CN203965830U - A kind of controlling hard switch machine system - Google Patents
A kind of controlling hard switch machine system Download PDFInfo
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- CN203965830U CN203965830U CN201420167861.4U CN201420167861U CN203965830U CN 203965830 U CN203965830 U CN 203965830U CN 201420167861 U CN201420167861 U CN 201420167861U CN 203965830 U CN203965830 U CN 203965830U
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Abstract
The utility model discloses a kind of controlling hard switch machine system, comprises power supply and current foldback circuit, switching on and shutting down button, hardware boot-strap circuit, software shutdown circuit, hardware circuit for forced shutdown, hardware forced shutdown time adjustment circuit and key press detecting circuit.Compared with prior art, the controlling hard switch machine system that the utility model provides, the hardware unused time is controlled, and off-mode can detect, almost zero-power simple, safe and reliable of standby.
Description
Technical field
The utility model relates to field of medical, exactly refers to a kind of controlling hard switch machine system.
Background technology
At present, in the on/off circuit of Medical Devices, design one is hardware switch machine, and another kind is software switch machine mode, and the third is hardware switch machine+software shutdown mode.The first is by the pressing and disconnect mechanical control system power supply of power knob, and the simple and standby current of control mode can reach zero-power.The second carrys out the open and close of control system power supply by microcontroller, after shutdown system power supply, can enter holding state, still can consume mA rank or hundreds of uA rank electric current, more serious problem is in the situation of microcontroller deadlock or paralysis, only have in the situation that disconnects battery and external power source and could recover, for product maintenance brings very big inconvenience.The third is the combination of first two, sort circuit also passes through many improvement, wherein the control mode of handlebar hardware switch machine machinery changes circuit control into, for example utilize the negate that trigger is good to reach the object that substitutes Machinery Control System open and close, stability is a bit stronger, but trigger obtains moment power consumption.
Along with the lifting of modern medical equipment technology, also on/off circuit is had higher requirement: 1, some user's configuration datas and the critical data the processed action of shutting down again after obtaining and can being preserved in time, it is inadvisable that now mechanical type closes the mode of tester in power-down state immediately; 2, encountering soft-off malfunctioning in the situation that, must have hardware forced shutdown, now the mode of MCU control system power supply is inadvisable; 3, accomplish low-power consumption, it is more lasting that battery uses, and now the static power consumption of mA rank or hundreds of uA rank electric current obtains and improved.
Utility model content
For above-mentioned defect, the technical matters that the utility model solves is to provide a kind of controlling hard switch machine system, and the hardware unused time is controlled, and off-mode can detect, almost zero-power simple, safe and reliable of standby.
In order to solve above technical matters, the controlling hard switch machine system that the utility model provides, comprise power supply and current foldback circuit, switching on and shutting down button, hardware boot-strap circuit, software shutdown circuit, hardware circuit for forced shutdown, hardware forced shutdown time adjustment circuit and key press detecting circuit, described power supply and current foldback circuit are connected with described switching on and shutting down push button signalling, described switching on and shutting down are by hardware boot-strap circuit described in key control, software shutdown circuit, hardware forced shutdown time adjustment circuit and key press detecting circuit, hardware circuit for forced shutdown described in the control of described hardware forced shutdown time adjustment circuit, wherein:
Described power supply and current foldback circuit: while realizing short circuit that late-class circuit operation irregularity occurs or the excessive phenomenon of power consumption, reach the effect of power cutoff protection late-class circuit;
Described switching on and shutting down button: realize manual triggers hardware starting-up signal and trigger soft-off signal and hardware forced shutdown;
Described hardware boot-strap circuit: realize the process of transmitting starting-up signal after manual trigger switch machine button;
Described hardware forced shutdown time adjustment circuit: the time of realizing forced shutdown is controlled;
Described key press detecting circuit: realize soft-off for controller trigger pip is provided;
Described software shutdown circuit: for controller output off signal provides function realizing circuit;
Described hardware circuit for forced shutdown: in the time that soft-off lost efficacy, reach at any time the accurately object of shutdown.
Preferably, described power supply and current foldback circuit are specially: power supply is adapter and battery, the output terminal of adapter and battery is connected resettable fuse (F1) by diode (D20) with diode (D18) respectively, and the output terminal of described resettable fuse (F1) is connected with the source electrode of power MOS pipe (U28); The source electrode of described power MOS pipe (U28) is connected with its grid by resistance (R150), the output terminal of described power MOS pipe (U28), i.e. drain electrode is connected to filter capacitor (C75) and filter capacitor (C77), is then connected with load.
Preferably, described switching on and shutting down button (K1) is specially: its one end connecting pin (1,4) is connected with the source electrode of described power MOS pipe (U28), the input end parallel join of other end connecting pin (2,3) Fen San road and hardware boot-strap circuit, hardware circuit for forced shutdown, key press detecting circuit.
Preferably, described hardware boot-strap circuit is specially: the connecting pin (2,3) by described switching on and shutting down button (K1) is connected with the positive pole of diode (D2), described diode (D2) negative pole is connected to ground by electric capacity (C158), described diode (D2) negative pole is also connected with the grid of power MOS pipe (U16) by resistance (R96), and described power MOS pipe (U16) grid is connected to ground by resistance (R90); Described power MOS pipe (U16) source ground, the drain electrode of described power MOS pipe (U16) is connected with the grid of described power MOS pipe (U28).
Preferably, described software shutdown circuit is specially: its one end is connected with master control IO mouth, the other end is directly connected with triode (Q1) base stage, the base stage of described triode (Q1) is connected to ground by electric capacity (C9), the direct ground connection of emitter of described triode (Q1), the collector of described triode (Q1) is connected with diode (D1) negative pole by resistance (R7), the positive pole of described diode (D1) is connected with VCC, and the collector of described triode (Q1) is also connected with the grid of described power MOS pipe (U16) by resistance (R151); The drain electrode of described power MOS pipe (U16) is connected with the grid of power MOS pipe (U28), the source ground of described power MOS pipe (U16).
Preferably, described hardware circuit for forced shutdown is specially: its input end is connected with the connecting pin (2,3) of switching on and shutting down button (K1) by resistance (R155), described resistance (R155) is also connected with the crus secunda of stabilivolt (U31), and described resistance (R155) is also connected with the first pin of stabilivolt (U31) by resistance (R154); The first pin of described stabilivolt (U31) is by resistance (R145) ground connection, the direct ground connection of tripod of described stabilivolt (U31), the crus secunda of described stabilivolt (U31) is by electric capacity (C168) ground connection, the crus secunda of described stabilivolt (U31) is also connected to ground by resistance (R208), and the crus secunda of described stabilivolt (U31) is also connected with diode (D15) by resistance (R207); The positive pole of described diode (D15) is connected with electric capacity (C170) is anodal; Described electric capacity (C170) minus earth, the positive pole of described electric capacity (C170) is connected with the tripod of amplifier (U9) by resistance (R209), and the positive pole of described electric capacity (C170) is also connected to ground by electric capacity (C106); The tripod of described amplifier (U9) is also connected to ground by resistance (R210), the 4th pin ground connection of described amplifier (U9), the octal of described amplifier (U9) is connected with the negative pole of diode (D15), and the octal of described amplifier (U9) is also connected with the negative pole of diode (D8) and diode (D9); The positive pole of described diode (D8) is connected with the connecting pin of switching on and shutting down button (K1) (2,3), and the positive pole of described diode (D9) is connected with VCC; The first pin of described amplifier (U9) is connected with triode (Q12) base stage by resistance (R158); The base stage of described triode (Q12) is connected to ground by resistance (R211), the grounded emitter of described triode (Q12), and the collector of described triode (Q12) is connected with the grid of described power MOS pipe (U16); The crus secunda of described amplifier (U9) is connected with the crus secunda of stabilivolt (U43) by resistance (R213); The crus secunda of described stabilivolt (U43) is connected with the crus secunda of self, and the first pin of described stabilivolt (U43) is also connected with the connecting pin (2,3) of switching on and shutting down button (K1) by resistance (R212);
Preferably, described hardware forced shutdown time adjustment circuit is specially: belong to a part for hardware circuit for forced shutdown, its unused time t=RC, i.e. t=R207*C170.
Preferably, described key press detecting circuit is specially: its input end is by the base stage of resistance (R124) connecting triode (Q9), the base stage of described triode (Q9) is connected to ground by electric capacity (C109), the collector of described triode (Q9) meets VCC, the emitter of described triode (Q9) is by resistance (R125) ground connection, the emitter of described triode (Q9) also connects the IO mouth of micro-control unit (MCU) by resistance (R132), the IO mouth of described micro-control unit (MCU) is pulled down to ground by resistance (R131).
Compared with prior art, the controlling hard switch machine system that the utility model provides, the hardware unused time is controlled, and off-mode can detect, almost zero-power simple, safe and reliable of standby.
Brief description of the drawings
Fig. 1 is the theory diagram of controlling hard switch machine system in the utility model embodiment;
Fig. 2 is the circuit structure diagram of controlling hard switch machine system in the utility model embodiment.
Embodiment
For those skilled in the art can understand technical scheme provided by the utility model better, set forth below in conjunction with specific embodiment.
Refer to Fig. 1 and Fig. 2, Fig. 1 is the theory diagram of controlling hard switch machine system in the utility model embodiment; Fig. 2 is the circuit structure diagram of controlling hard switch machine system in the utility model embodiment.
The controlling hard switch machine system that the utility model embodiment provides, comprise power supply and current foldback circuit, switching on and shutting down button, hardware boot-strap circuit, software shutdown circuit, hardware circuit for forced shutdown, hardware forced shutdown time adjustment circuit and key press detecting circuit, described power supply and current foldback circuit are connected with described switching on and shutting down push button signalling, described switching on and shutting down are by hardware boot-strap circuit described in key control, software shutdown circuit, hardware forced shutdown time adjustment circuit and key press detecting circuit, hardware circuit for forced shutdown described in the control of described hardware forced shutdown time adjustment circuit, wherein:
Power supply and current foldback circuit: while realizing short circuit that late-class circuit operation irregularity occurs or the excessive phenomenon of power consumption, reach the effect of power cutoff protection late-class circuit; Switching on and shutting down button: realize manual triggers hardware starting-up signal and trigger soft-off signal and hardware forced shutdown; Hardware boot-strap circuit: realize the process of transmitting starting-up signal after manual trigger switch machine button; Hardware forced shutdown time adjustment circuit: the time of realizing forced shutdown is controlled; Key press detecting circuit: realize soft-off for controller trigger pip is provided; Software shutdown circuit: for controller output off signal provides function realizing circuit; Hardware circuit for forced shutdown: in the time that soft-off lost efficacy, reach at any time the accurately object of shutdown.
Power supply and current foldback circuit: power supply is adapter and battery, the output terminal of adapter and battery is connected resettable fuse F1 by diode D20 with diode D18 respectively, and the output terminal of resettable fuse F1 is connected with the source electrode of power MOS pipe U28; The source electrode of power MOS pipe U28 is connected with its grid by resistance R 150, the output terminal of power MOS pipe U28, i.e. and drain electrode is connected to filter capacitor C75 and filter capacitor C77, is then connected with load;
Switching on and shutting down button K1: its one end connecting pin 1,4 is connected with the source electrode of power MOS pipe U28, the input end parallel join of other end connecting pin 2,3 Fen San roads and hardware boot-strap circuit, hardware circuit for forced shutdown, key press detecting circuit;
Hardware boot-strap circuit: the connecting pin 2,3 by switching on and shutting down button K1 is connected with the positive pole of diode D2, diode D2 negative pole is connected to ground by capacitor C 158, diode D2 negative pole is also connected with the grid of power MOS pipe U16 by resistance R 96, and power MOS pipe U16 grid is connected to ground by resistance R 90; Power MOS pipe U16 source ground, the drain electrode of power MOS pipe U16 is connected with the grid of power MOS pipe U28;
Software shutdown circuit: its one end is connected with master control IO mouth, the other end is directly connected with triode Q1 base stage, the base stage of triode Q1 is connected to ground by capacitor C 9, the direct ground connection of emitter of triode Q1, the collector of triode Q1 is connected with diode D1 negative pole by resistance R 7, the positive pole of diode D1 is connected with VCC, and the collector of triode Q1 is also connected with the grid of power MOS pipe U16 by resistance R 151; The drain electrode of power MOS pipe U16 is connected with the grid of power MOS pipe U28, the source ground of MOS pipe U16;
Hardware circuit for forced shutdown: its input end is connected with the connecting pin 2,3 of switching on and shutting down button K1 by resistance R 155, and resistance R 155 is also connected with the crus secunda of stabilivolt U31, resistance R 155 is also connected with the first pin of stabilivolt U31 by resistance R 154; The first pin of stabilivolt U31 is by resistance R 145 ground connection, the direct ground connection of tripod of stabilivolt U31, the crus secunda of stabilivolt U31 is by capacitor C 168 ground connection, the crus secunda of stabilivolt U31 is also connected to ground by resistance R 208, and the crus secunda of stabilivolt U31 is also connected with diode D15 by resistance R 207; The positive pole of diode D15 is connected with capacitor C 170 is anodal; Capacitor C 170 minus earths, the positive pole of capacitor C 170 is connected with the tripod of amplifier U9 by resistance R 209, and the positive pole of capacitor C 170 is also connected to ground by capacitor C 106; The tripod of amplifier U9 is also connected to ground by resistance R 210, the 4th pin ground connection of amplifier U9, and the octal of amplifier U9 is connected with the negative pole of diode D15, and the octal of amplifier U9 is also connected with the negative pole of diode D8 and diode D9; The positive pole of diode D8 is connected with the connecting pin 2,3 of switching on and shutting down button K1, and the positive pole of diode D9 is connected with VCC; The first pin of amplifier U9 is connected with triode Q12 base stage by resistance R 158; The base stage of triode Q12 is connected to ground by resistance R 211, the grounded emitter of triode Q12, and the collector of triode Q12 is connected with the grid of power MOS pipe U16; The crus secunda of amplifier U9 is connected with the crus secunda of stabilivolt U43 by resistance R 213; The crus secunda of stabilivolt U43 be connected with the crus secunda of self, the first pin of stabilivolt U43 is also connected with the connecting pin 2,3 of switching on and shutting down button K1 by resistance R 212;
Hardware forced shutdown time adjustment circuit: belong to a part for hardware circuit for forced shutdown, its unused time t=RC, i.e. t=resistance R 207* capacitor C 170;
Key press detecting circuit: its input end is by the base stage of resistance R 124 connecting triode Q9, the base stage of triode Q9 is connected to ground by capacitor C 109, the collector of triode Q9 meets VCC, the emitter of triode Q9 is by resistance R 125 ground connection, the emitter of triode Q9 also connects the IO mouth of micro-control unit MCU by resistance R 132, the IO mouth of micro-control unit MCU is pulled down to ground by resistance R 131.
In the present embodiment, the course of action of the controlling hard switch machine system that the utility model provides is as follows:
1), hardware start:
While start, when switching on and shutting down button, K1 presses, the connecting pin 2,3 of switching on and shutting down button K1 switch on power adapter or battery, now high level is by the lead grid of power MOS pipe U16 of diode D2 and resistance R 96, now the grid of power MOS pipe U16 sets high, make power MOS pipe U16 conducting, its drain electrode level sets low and causes power MOS pipe U28 conducting, VCC is powered subsequently, VCC sets high the grid of power MOS pipe again through diode D1 and resistance R 7, resistance R 151, holding power metal-oxide-semiconductor U16 is in conducting state, and final realization started shooting.
2), button detects:
After start, when switching on and shutting down button, K1 presses, and produces high level, opens triode Q9 by R124, and VCC is undertaken outputing to micro-control unit MCU after dividing potential drop by resistance R 131 and resistance R 132 and gathers subsequently, detects that high level is switching on and shutting down button K1 and presses; After switching on and shutting down button K1 unclamps, what micro-control unit MCU collected is low level.
3), software shutdown:
After start, MCU, according to oneself requirement, can export high level and make triode Q1 conducting, then drags down power MOS pipe U16, causes power MOS pipe U16 cut-off and reaches and close power MOS pipe U28, realizes software shutdown.
4), hardware forced shutdown:
After start, if soft-off lost efficacy or micro-control unit MCU crashes, can grow by switching on and shutting down button K1, level reduction of fractions to a common denominator two-way flows to crus secunda and the tripod of amplifier U9, the crus secunda level that flows to amplifier U9 is processed a fixed level 2.5V of rear output by resistance R 212 with stabilivolt U43, and this fixed level outputs to the crus secunda of amplifier U9 as reference voltage source, flow to the tripod level of amplifier U9 by resistance R 155, resistance R 154, resistance R 145 is exported 6.25V level after processing with stabilivolt U31, charge to capacitor C 170 through resistance R 207 subsequently, charging level is through resistance R 207, after resistance R 209 and resistance R 210 dividing potential drops, export the tripod of amplifier U9 to, in the time that level exceedes the crus secunda reference voltage 2.5V of amplifier U9, the first pin of amplifier U9 becomes high level from original low level, high level is opened triode Q12 by resistance R 158, dragged down the grid of power MOS pipe U16 by triode Q12, now power MOS pipe U16 cut-off, close power MOS pipe U28 thereby reach, realize hardware forced shutdown.
Supplementary notes about RC delay circuit:
The calculating of RC delay circuit time, simple method is exactly t=RC, it is the time constant in RC loop, in the time of charging, the time of a t of every mistake, on capacitor voltage just rise (1-1/e) approximate input source voltage (being the voltage in resistance R 208 in the utility model circuit) and condenser voltage (voltage on the utility model circuit capacitance C170) poor of 0.632 times; In the utility model circuit, for the hardware unused time is controlled to t=RC=R208*C170=100*10^3* (33/10^6)=3.3 second, the tripod input voltage of amplifier U9 must exceed the input voltage of crus secunda within the time of 3.3 seconds so.According to this theory, the resistance of resistance R 207, resistance R 209, resistance R 210 is rationally set, can design the accurately controlled hardware unused time.
Supplementary notes about standby current:
This circuit is under off-mode, actual measurement has the static power consumption that is less than 20uA, mainly to come from power MOS pipe, size is taken from pull-up resistor R150, if also need to reduce static power consumption size, can take to increase the mode of resistance, but its turn-off capacity decreases, so can adjust according to actual, and the circuit of the present embodiment is got its representative value 10K.
Compared with prior art, the controlling hard switch machine system that the utility model provides, the hardware unused time is controlled, and off-mode can detect, and almost zero-power simple, safe and reliable of standby, particularly, has the following advantages:
1, all adopt discrete device composition, circuit is simple, safe and reliable to operation, has the lower power consumption for the treatment of than present congenerous application circuit, and actual measurement is lower than 20uA;
2, the utility model is to prevent the software malfunctioning situation of shutting down, and has increased hardware forced shutdown, and Product Safety is promoted greatly, safeguards and obtains larger convenience;
3, the hardware unused time of the present utility model controlled, t=RC, is more suitable for modern medical equipment user's configuration data and the critical data processed is obtained to the particular/special requirement that can be preserved in time.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a controlling hard switch machine system, it is characterized in that, comprise power supply and current foldback circuit, switching on and shutting down button, hardware boot-strap circuit, software shutdown circuit, hardware circuit for forced shutdown, hardware forced shutdown time adjustment circuit and key press detecting circuit, described power supply and current foldback circuit are connected with described switching on and shutting down push button signalling, described switching on and shutting down are by hardware boot-strap circuit described in key control, software shutdown circuit, hardware forced shutdown time adjustment circuit and key press detecting circuit, hardware circuit for forced shutdown described in the control of described hardware forced shutdown time adjustment circuit, wherein:
Described power supply and current foldback circuit: while realizing short circuit that late-class circuit operation irregularity occurs or the excessive phenomenon of power consumption, reach the effect of power cutoff protection late-class circuit;
Described switching on and shutting down button: realize manual triggers hardware starting-up signal and trigger soft-off signal and hardware forced shutdown;
Described hardware boot-strap circuit: realize the process of transmitting starting-up signal after manual trigger switch machine button;
Described hardware forced shutdown time adjustment circuit: the time of realizing forced shutdown is controlled;
Described key press detecting circuit: realize soft-off for controller trigger pip is provided;
Described software shutdown circuit: for controller output off signal provides function realizing circuit;
Described hardware circuit for forced shutdown: in the time that soft-off lost efficacy, reach at any time the accurately object of shutdown.
2. controlling hard switch machine system according to claim 1, it is characterized in that, described power supply and current foldback circuit are specially: power supply is adapter and battery, the output terminal of adapter and battery be connected resettable fuse F1 by diode D20 with diode D18 respectively described in the output terminal of resettable fuse F1 be connected with the source electrode of power MOS pipe U28; The source electrode of described power MOS pipe U28 is connected with its grid by resistance R 150, the output terminal of described power MOS pipe U28, i.e. and drain electrode is connected to filter capacitor C75 and filter capacitor C77, is then connected with load.
3. controlling hard switch machine system according to claim 2, it is characterized in that, described switching on and shutting down button K1 is specially: its one end connecting pin (1,4) is connected with the source electrode of described power MOS pipe U28, the input end parallel join of other end connecting pin (2,3) Fen San road and hardware boot-strap circuit, hardware circuit for forced shutdown, key press detecting circuit.
4. controlling hard switch machine system according to claim 3, it is characterized in that, described hardware boot-strap circuit is specially: the connecting pin (2,3) by described switching on and shutting down button K1 is connected with the positive pole of diode D2, described diode D2 negative pole is connected to ground by capacitor C 158, described diode D2 negative pole is also connected with the grid of power MOS pipe U16 by resistance R 96, and described power MOS pipe U16 grid is connected to ground by resistance R 90; Described power MOS pipe U16 source ground, the drain electrode of described power MOS pipe U16 is connected with the grid of described power MOS pipe U28.
5. controlling hard switch machine system according to claim 4, it is characterized in that, described software shutdown circuit is specially: its one end is connected with master control IO mouth, the other end is directly connected with triode Q1 base stage, the base stage of described triode Q1 is connected to ground by capacitor C 9, the direct ground connection of emitter of described triode Q1, the collector of described triode Q1 is connected with diode D1 negative pole by resistance R 7, the positive pole of described diode D1 is connected with VCC, and the collector of described triode Q1 is also connected with the grid of described power MOS pipe U16 by resistance R 151; The drain electrode of described power MOS pipe U16 is connected with the grid of power MOS pipe U28, the source ground of described power MOS pipe U16.
6. controlling hard switch machine system according to claim 5, it is characterized in that, described hardware circuit for forced shutdown is specially: its input end is connected with the connecting pin (2,3) of switching on and shutting down button K1 by resistance R 155, described resistance R 155 is also connected with the crus secunda of stabilivolt U31, and described resistance R 155 is also connected with the first pin of stabilivolt U31 by resistance R 154; The first pin of described stabilivolt U31 is by resistance R 145 ground connection, the direct ground connection of tripod of described stabilivolt U31, the crus secunda of described stabilivolt U31 is by capacitor C 168 ground connection, the crus secunda of described stabilivolt U31 is also connected to ground by resistance R 208, and the crus secunda of described stabilivolt U31 is also connected with diode D15 by resistance R 207; The positive pole of described diode D15 is connected with capacitor C 170 is anodal; Described capacitor C 170 minus earths, the positive pole of described capacitor C 170 is connected with the tripod of amplifier U9 by resistance R 209, and the positive pole of described capacitor C 170 is also connected to ground by capacitor C 106; The tripod of described amplifier U9 is also connected to ground by resistance R 210, the 4th pin ground connection of described amplifier U9, and the octal of described amplifier U9 is connected with the negative pole of diode D15, and the octal of described amplifier U9 is also connected with the negative pole of diode D8 and diode D9; The positive pole of described diode D8 is connected with the connecting pin (2,3) of switching on and shutting down button K1, and the positive pole of described diode D9 is connected with VCC; The first pin of described amplifier U9 is connected with triode Q12 base stage by resistance R 158; The base stage of described triode Q12 is connected to ground by resistance R 211, the grounded emitter of described triode Q12, and the collector of described triode Q12 is connected with the grid of described power MOS pipe U16; The crus secunda of described amplifier U9 is connected with the crus secunda of stabilivolt U43 by resistance R 213; The crus secunda of described stabilivolt U43 is connected with the crus secunda of self, and the first pin of described stabilivolt U43 is also connected with the connecting pin (2,3) of switching on and shutting down button K1 by resistance R 212.
7. controlling hard switch machine system according to claim 6, is characterized in that, described hardware forced shutdown time adjustment circuit is specially: belong to a part for hardware circuit for forced shutdown, its unused time t=RC, i.e. t=R207*C170.
8. controlling hard switch machine system according to claim 7, it is characterized in that, described key press detecting circuit is specially: its input end is by the base stage of resistance R 124 connecting triode Q9, the base stage of described triode Q9 is connected to ground by capacitor C 109, the collector of described triode Q9 meets VCC, the emitter of described triode Q9 is by resistance R 125 ground connection, the emitter of described triode Q9 also connects the IO mouth of micro-control unit MCU by resistance R 132, the IO mouth of described micro-control unit MCU is pulled down to ground by resistance R 131.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420167861.4U CN203965830U (en) | 2014-04-08 | 2014-04-08 | A kind of controlling hard switch machine system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420167861.4U CN203965830U (en) | 2014-04-08 | 2014-04-08 | A kind of controlling hard switch machine system |
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| CN203965830U true CN203965830U (en) | 2014-11-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869722A (en) * | 2014-04-08 | 2014-06-18 | 广东宝莱特医用科技股份有限公司 | Hard startup / shutdown system |
| CN107425835A (en) * | 2016-05-23 | 2017-12-01 | 中兴通讯股份有限公司 | A kind of on/off circuit |
| CN108008803A (en) * | 2018-01-30 | 2018-05-08 | 广东星创众谱仪器有限公司 | A kind of software and hardware on/off circuit and its method of work |
-
2014
- 2014-04-08 CN CN201420167861.4U patent/CN203965830U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869722A (en) * | 2014-04-08 | 2014-06-18 | 广东宝莱特医用科技股份有限公司 | Hard startup / shutdown system |
| CN103869722B (en) * | 2014-04-08 | 2017-01-04 | 广东宝莱特医用科技股份有限公司 | A kind of controlling hard switch machine system |
| CN107425835A (en) * | 2016-05-23 | 2017-12-01 | 中兴通讯股份有限公司 | A kind of on/off circuit |
| CN108008803A (en) * | 2018-01-30 | 2018-05-08 | 广东星创众谱仪器有限公司 | A kind of software and hardware on/off circuit and its method of work |
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