CN101354268A - Intelligent transmitter and safety device based on monostable circuit - Google Patents
Intelligent transmitter and safety device based on monostable circuit Download PDFInfo
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- CN101354268A CN101354268A CNA2008102000706A CN200810200070A CN101354268A CN 101354268 A CN101354268 A CN 101354268A CN A2008102000706 A CNA2008102000706 A CN A2008102000706A CN 200810200070 A CN200810200070 A CN 200810200070A CN 101354268 A CN101354268 A CN 101354268A
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Abstract
The invention provides an intelligent converter and a safety protection device based on a monostable circuit, wherein, the converter is used for converting a non-electric physical quantity to an analog-quantity electric signal and comprises a sensor, a V/I switching circuit, a micro processor and the safety protection device based on the monostable circuit. One end of the safety protection device based on the monostable circuit is connected with the micro processor of the intelligent converter, the other end is connected with the V/I switching circuit; the safety protection device is used for determining whether the work state of the micro processor is ineffective by testing whether the micro processor sends out a pulse signal within a preset period; and if the micro processor is ineffective, the intelligent converter outputs a preset current value. The converter and the device of the invention can monitor the work state of the micro processor, thereby effectively avoiding the occurrence of systematic errors.
Description
Technical field
The present invention relates to the intelligent transducer technical field, particularly a kind of based on the safety guard of monostable circuit and the intelligent transducer that uses this safety guard.
Background technology
Industrially generally need to measure all kinds of non-electric physical quantitys, for example temperature, pressure, speed, angle etc., these non-electric physical quantitys all need to convert to the analog quantity electric signal and just can be transferred on hundreds of the rice outer pulpit or display device.And transmitter is the equipment that is used to physical quantity is converted to electric signal.
The main flow transmitter is the two-wire system intelligent transducer of 4～20mA at present.Two-wire system transducer is meant that in-situ transducer and pulpit instrument are got in touch and only uses two leads that these two lines are power lead, are again signal wires.And in order to realize the basic function of intelligent transducer, as linearization process, temperature compensation, automatic zero point and range adjustment and digital communication etc., some Primary Components are essential as microprocessor, A/D converter, D/A converter, communication chip and sensor etc.As shown in Figure 1, it is existing a kind of intelligent transducer structural drawing, and this intelligent transducer comprises sensor 103, A/D converter 105, microprocessor 107, V/I change-over circuit 109, storer 111 and communication system 113.Sensor 103 simulating signals are sent into microprocessor 107 and are handled after A/D converter 105 converts digital quantity to, at last by V/I conversion phone 109 conversion outputs 4～20mA normalized current signal.Therefore, existing intelligent transducer can convert sensor 103 detected non-electric analogy amounts to normalized current effectively.
But when breaking down etc. former thereby the microprocessor of intelligent transducer inside was lost efficacy, export for fear of signal error, cause the wrong chain reaction of system, cause catastrophic consequence, this moment, the electric current output of intelligent transducer should be a default fault alarm current value, so that can in time find the system failure and it is carried out fault detect, so the failure detection of microprocessor is just particularly important.
At present, existing a solution is to adopt the D/A converter with PWM pulse-width modulation circuit.See also Fig. 2, it is for solving a kind of intelligent transducer partial structurtes figure that microprocessor lost efficacy.Microprocessor 107 comprises micro-processor kernel 201 and PWM pulse-width modulation circuit module 203.PWM pulse-width modulation circuit module 203 is carried out communication by bus and micro-processor kernel 201, it produces the PWM pulse width modulated wave, and generate DC voltage after 205 filtering of process low pass filter, and then become voltage transitions electric current to export through V-I change-over circuit 207.In this scheme, the function of PWM pulse-width modulation circuit module 203 is to produce the PWM pulse width modulated wave, and the dutycycle of this PWM pulse width modulated wave is proportional to current output value (dutycycle is meant the ratio in duration and total cycle of pulse of positive pulse).And the part that PWM pulse-width modulation circuit module 203 belongs in the microprocessor 107, when microprocessor 107 lost efficacy, just can not send the PWM pulse width modulated wave, making dutycycle is 0, this moment, the fault alarm current value was preset in the output one of D/A converter 109, thereby reached the purpose of microprocessor 107 failure detection.
Yet, because PWM pulse-width modulation circuit module 203 is made up of relatively independent circuit unit, and be to carry out communication by register between PWM pulse-width modulation circuit module 203 and the micro-processor kernel 201, when having only the parameter that needs change PWM pulse width modulated wave, just revises by microprocessor 107 its register.And in operate as normal, micro-processor kernel 201 does not need to carry out communication with PWM pulse-width modulation circuit module 203.So when microprocessor 107 lost efficacy, because PWM pulse-width modulation circuit module 203 is circuit modules of independent operating, as long as system clock is effective, this PWM pulse-width modulation circuit module 203 also still might continue operate as normal, thereby also just might detect the inefficacy of microprocessor 107 in time, the probability that exists omission to survey.
In sum, existing intelligent transducer can't carry out in time with accurately detecting when microprocessor lost efficacy.
Summary of the invention
The purpose of this invention is to provide a kind of intelligent transducer, with solve existing intelligent transducer can't be in time with detect the problem that microprocessor lost efficacy exactly.
Another object of the present invention provides a kind of safety guard based on monostable circuit, with solve existing intelligent transducer can't be in time with detect the problem that microprocessor lost efficacy exactly.
The present invention proposes a kind of intelligent transducer; in order to convert non-electric physical quantity to the analog quantity electric signal; it comprises sensor; the V/I change-over circuit; microprocessor and based on the safety guard of monostable circuit; end based on the safety guard of monostable circuit is connected with the microprocessor of intelligent transducer; the other end is connected with the V/I change-over circuit; in order to whether in setting-up time, to continue to send pulse signal by detecting microprocessor; whether the duty of judging microprocessor lost efficacy; if microprocessor lost efficacy, then make intelligent transducer output one set current value.
According to the described intelligent transducer of preferred embodiment of the present invention; its safety guard based on monostable circuit comprises monostable trigger module and DAC digital to analog converter; the monostable trigger module links to each other with microprocessor; the DAC digital to analog converter links to each other with monostable trigger module and V/I change-over circuit respectively; wherein; the monostable trigger module can be single-shot trigger circuit; it comprises the first transistor; transistor seconds; power end; timing resistor and timing capacitor; the base stage of the first transistor is connected to microprocessor; the collector of the first transistor connects the base stage of transistor seconds; the grounded emitter of the first transistor; one end of timing resistor is connected to power end; the other end is connected on the line between the first transistor collector and the transistor seconds base stage; timing capacitor one end ground connection; the other end is connected on the line between the first transistor collector and the transistor seconds base stage, and the collector of transistor seconds is connected to the DAC digital to analog converter, the grounded emitter of transistor seconds.
According to the described intelligent transducer of preferred embodiment of the present invention, single-shot trigger circuit also comprises current-limiting resistance and capacitance, one end of current-limiting resistance is connected to microprocessor, and the other end is connected with an end of capacitance, and the other end of capacitance is connected with the base stage of the first transistor.
According to the described intelligent transducer of preferred embodiment of the present invention, single-shot trigger circuit also comprises diode, and its N level is connected on the line between capacitance and the first transistor base stage, its P level ground connection.
According to the described intelligent transducer of preferred embodiment of the present invention, described monostable trigger module comprises monostalbe trigger, timing resistor and timing capacitor, wherein monostalbe trigger comprises timing resistor incoming end, timing capacitor incoming end, trigger end and output terminal again, timing resistor is connected to the timing resistor incoming end of monostalbe trigger, timing capacitor is connected to the timing capacitor incoming end of monostalbe trigger, the trigger end of monostalbe trigger is connected to microprocessor, and the output terminal of monostalbe trigger is connected to the DAC digital to analog converter.
The present invention proposes a kind of safety guard based on monostable circuit in addition; it is arranged in the intelligent transducer; in order to detect the duty of the microprocessor in the intelligent transducer; and according to the electric signal output of the duty of microprocessor control intelligent transducer, this safety guard based on monostable circuit comprises monostable trigger module and DAC digital to analog converter.The input end of monostable trigger module is connected with microprocessor, be used for receiving the reset pulse that microprocessor sends, produce the system works normal signal, wherein, its input end is constantly received the refresh pulse from CPU, then produce a stable high level signal at output terminal, if surpass the reseting pulse signal that the setting-up time scope is not received this microprocessor, then its output terminal produces low level signal.The input end of DAC digital to analog converter is connected with the output terminal of monostable trigger module, if its input end is detected is the stable high level signal of monostable trigger module output, then its resetting pin is invalid inoperative, if its input end is detected is the low level signal of monostable trigger module output, then its resetting pin works, make the DAC digital to analog converter reset, its output current is restricted to a setting value.
According to the described safety guard of preferred embodiment of the present invention based on monostable circuit; the monostable trigger module can be single-shot trigger circuit; it comprises the first transistor; transistor seconds; power end; timing resistor and timing capacitor; the base stage of the first transistor is connected to microprocessor; the collector of the first transistor connects the base stage of transistor seconds; the grounded emitter of the first transistor; one end of timing resistor is connected to power end; the other end is connected on the line between the first transistor collector and the transistor seconds base stage; timing capacitor one end ground connection; the other end is connected on the line between the first transistor collector and the transistor seconds base stage; the collector of transistor seconds is connected to the DAC digital to analog converter, the grounded emitter of transistor seconds.
According to the described safety guard of preferred embodiment of the present invention based on monostable circuit; its single-shot trigger circuit also comprises current-limiting resistance and capacitance; current-limiting resistance one end is connected to microprocessor; the other end is connected with capacitance one end, and the other end of capacitance is connected with the base stage of the first transistor.
According to the described safety guard based on monostable circuit of preferred embodiment of the present invention, its single-shot trigger circuit also comprises diode, and its N level is connected on the line between capacitance and the first transistor base stage, its P level ground connection.
According to the described safety guard of preferred embodiment of the present invention based on monostable circuit; its monostable trigger module comprises monostalbe trigger, timing resistor and timing capacitor; wherein monostalbe trigger comprises timing resistor incoming end, timing capacitor incoming end, trigger end and output terminal again; timing resistor is connected to the timing resistor incoming end of monostalbe trigger; timing capacitor is connected to the timing capacitor incoming end of monostalbe trigger; the trigger end of monostalbe trigger is connected to microprocessor, and the output terminal of monostalbe trigger is connected to the DAC digital to analog converter.
Compared with prior art; the present invention has the following advantages: the safety protective circuit device that the present invention can utilize monostable trigger module and DAC digital to analog converter to constitute comes the duty of microprocessor is monitored; if find that microprocessor is in failure state; then the DAC digital to analog converter is exported a default fault alarm current value; thereby can in time find the system failure; and it is carried out the system failure handle, prevent to cause the wrong chain reaction of system.
Description of drawings
Fig. 1 is existing a kind of intelligent transducer structural drawing;
Fig. 2 is existing a kind of intelligent transducer partial structurtes figure;
Fig. 3 is a kind of intelligent transducer structural drawing of the embodiment of the invention;
Fig. 4 is the circuit diagram of a kind of single-shot trigger circuit of the embodiment of the invention;
Fig. 5 is the another kind of monostable circuit circuit diagram of the embodiment of the invention;
Fig. 6 is a kind of monostable circuit working timing figure of the embodiment of the invention.
Embodiment
Principle of the present invention is: the present invention has added a safety guard based on monostable circuit in existing transmitter, and by the duty based on the microprocessor of the safety guard monitoring transducer of monostable circuit.If find that microprocessor is in failure state, make transmitter export a predetermined current value at once, so that in time find the system failure, thus it is carried out Breakdown Maintenance, the wrong chain reaction of anti-locking system.
Below in conjunction with accompanying drawing, specify the present invention.
See also Fig. 3, it is a kind of intelligent transducer structural drawing of the embodiment of the invention.This intelligent transducer comprises sensor 303, V/I change-over circuit 309, microprocessor 307 and based on the safety guard 301 of monostable circuit.Safety guard 301 based on monostable circuit comprises DAC digital to analog converter 305 and monostable trigger module 311 again.Sensor 303 is connected with microprocessor 307, microprocessor 307 is connected with DAC digital to analog converter 305, the DAC digital to analog converter is connected with V/I change-over circuit 309, and monostable trigger module 311 1 ends connect microprocessor 307, and the other end connects DAC digital to analog converter 305.This intelligent transducer is when operate as normal, sensor 303 detected external data signals are delivered to microprocessor 307 and are handled, then microprocessor 307 deal with data convert analog voltage signal to by DAC digital to analog converter 305, convert the output of normalized current signal to by V/I change-over circuit 309 at last.In the present embodiment, when microprocessor 307 operate as normal, can regularly send quenching pulse, after monostable trigger module 311 receives quenching pulse to monostable trigger module 311, just can send a steady state voltage to DAC digital to analog converter 305, and make DAC digital to analog converter 305 operate as normal.And when microprocessor 307 lost efficacy, because the program cisco unity malfunction also just can't regularly send reset signal to monostable trigger module 311.If monostable trigger module 311 does not receive the reset signal that microprocessor 307 sends in a period of time of setting, then it can be decided to be microprocessor 307 duty of inefficacy, and, control the default fault alarm current value of DAC digital to analog converter 305 outputs at last to voltage opposite of DAC digital to analog converter 305 outputs with respect to steady state voltage.
In actual applications, the resetting pin of DAC digital to analog converter 305 can be directly controlled in the output of monostable trigger module 311, when microprocessor 307 lost efficacy, monostable trigger module 311 will reverse to the level of the resetting pin output of DAC digital to analog converter 305, thereby DAC digital to analog converter 305 is resetted, make the default fault alarm current value of its output.
When microprocessor 307 operate as normal, pulse from stable state to single-shot trigger circuit that can regularly send is promptly regularly imported a steady state voltage by the INPUT end, then can flow through electric current on current-limiting resistance R1 and capacitance C1, and make the first transistor Q1 conducting.Can be in the time of the first transistor Q1 conducting timing capacitor C2 rapid discharge, thus the undertension that makes transistor seconds Q2 base stage is with conducting transistor seconds Q2.That is to say when working as microprocessor 307 operate as normal that this single-shot trigger circuit is not influence 305 work of DAC digital to analog converter.
When microprocessor 307 lost efficacy, that is to say when the INPUT end does not have the potential pulse input that the base stage of the first transistor Q1 is not owing to there is bias current, thereby the first transistor Q1 ends.This moment, timing resistor R2 can charge to timing capacitor C2, and the voltage of transistor seconds Q2 base stage is risen.After surpassing cut-in voltage to the voltage of transistor seconds Q2 base stage, transistor seconds Q2 will conducting, makes the OUTPUT output low level.Because single-shot trigger circuit is connected to the resetting pin of DAC digital to analog converter 305, so the low level of single-shot trigger circuit output this moment resets to DAC digital to analog converter 305.
In addition, unidirectional saturated for preventing capacitance C1, diode D1 provides a discharge loop for capacitance C1.
When single-shot trigger circuit was sent pulse, the time interval of pulse was set according to timing resistor R2 and timing capacitor C2 at microprocessor 307.Therefore if the recurrence interval that microprocessor 307 sends less than timing, just can make single-shot trigger circuit play the effect of monitoring microprocessor 307 duties.
See also Fig. 5, this monostable circuit comprises 74HC123 chip, timing resistor RT and timing capacitor CT.The 74HC123 chip is a kind of monostalbe trigger, and it comprises timing resistor incoming end RCCOM, timing capacitor incoming end CTC, trigger end TRA, trigger end TRB, reset terminal CLR and output terminal Q.Timing resistor RT is connected to the timing resistor incoming end RCCOM of monostalbe trigger 74HC123, timing capacitor CT is connected to the timing capacitor incoming end CTC of monostalbe trigger 74HC123, the trigger end TRA of monostalbe trigger 74HC123 is connected to microprocessor 307, and monostalbe trigger 74HC123 output terminal Q is connected to DAC digital to analog converter 305.
In this embodiment, trigger end TRA is that negative edge triggers input end, and microprocessor 307 sends negative pulse to trigger end TRA and triggers, and the time spent does not keep high level to trigger end TRA.Trigger end TRB is that rising edge triggers input end, and microprocessor 307 sends positive pulse to trigger end and triggers, and the time spent does not keep low level to trigger end TRB.As shown in Figure 6, it is the single-shot trigger circuit working timing figure of present embodiment, and monostalbe trigger 74HC123 is by edge-triggered (rising edge or negative edge), and output terminal Q produces the monopulse of width T ≈ RT*CT, has only used negative edge trigger end TRA among the figure.After trigger end TRA triggered a negative edge, output terminal Q will become the low level of stable state.As trigger end TRA when repeatedly negative edge triggers in less than timing T, output terminal Q will keep the high level of transient state always, till trigger end TRA triggers in the T at the appointed time once more.
As seen utilize the principle of work of the single-shot trigger circuit of present embodiment, when microprocessor 307 operate as normal, as long as in official hour T, single-shot trigger circuit is triggered, monostable circuit 311 will keep the high level output of transient state always, thereby can be to the resetting pin zero clearing of DAC digital to analog converter 305.And when microprocessor 307 lost efficacy, because can't trigger single-shot trigger circuit once more, the output of single-shot trigger circuit just can become the low level of stable state so, and just can reset to DAC digital to analog converter 305 this moment, that is to say the purpose that has reached monitoring microprocessor 307 duties.
The present invention also proposes a kind of safety guard based on monostable circuit, and it is arranged in the intelligent transducer, in order to detecting the duty of the microprocessor in the intelligent transducer, and according to the electric signal output of the duty control intelligent transducer of microprocessor.This is identical with the safety guard 301 based on monostable circuit in the above-mentioned intelligent transducer based on the structure of the safety guard of monostable circuit and function, herein repeated description no longer.
Compared with prior art; the present invention has the following advantages: the safety protective circuit device that the present invention can utilize monostable trigger module and DAC digital to analog converter to constitute comes the duty of microprocessor is monitored; if find that microprocessor is in failure state; then the DAC digital to analog converter is exported a default fault alarm current value; thereby can in time find the system failure; and it is carried out the system failure handle, prevent to cause the wrong chain reaction of system.
More than disclosed only be several specific embodiment of the present invention, but the present invention is not limited thereto, any those skilled in the art can think variation, all should drop in protection scope of the present invention.
Claims (10)
1; a kind of intelligent transducer; in order to convert non-electric physical quantity to the analog quantity electric signal; it comprises a sensor; one V/I change-over circuit; one microprocessor; it is characterized in that; it also comprises a safety guard based on monostable circuit; the one end is connected with this microprocessor of this intelligent transducer; the other end is connected with this V/I change-over circuit; in order to whether in setting-up time, to continue to send pulse signal by detecting this microprocessor; whether the duty of judging this microprocessor lost efficacy; if this microprocessor lost efficacy, then make this intelligent transducer output one set current value.
2, intelligent transducer as claimed in claim 1; it is characterized in that; should comprise a monostable trigger module and a DAC digital to analog converter based on the safety guard of monostable circuit; this monostable trigger module links to each other with this microprocessor; this DAC digital to analog converter links to each other with this monostable trigger module and this V/I change-over circuit respectively
3, intelligent transducer as claimed in claim 2, it is characterized in that, this monostable trigger module can be a single-shot trigger circuit, it comprises a first transistor, one transistor seconds, one power end, one timing resistance and one is electric capacity regularly, the base stage of this first transistor is connected to this microprocessor, the collector of this first transistor connects the base stage of this transistor seconds, the grounded emitter of this first transistor, one end of this timing resistor is connected to this power end, the other end is connected on the line between the first transistor collector and the transistor seconds base stage, this timing capacitor one end ground connection, the other end is connected on the line between the first transistor collector and the transistor seconds base stage, the collector of this transistor seconds is connected to this DAC digital to analog converter, the grounded emitter of this transistor seconds.
4, intelligent transducer as claimed in claim 3, it is characterized in that, this single-shot trigger circuit also comprises a current-limiting resistance, a capacitance and a diode, one end of this current-limiting resistance is connected to this microprocessor, the other end is connected with an end of this capacitance, the other end of this capacitance is connected with the base stage of this first transistor, and the N level of this diode is connected on the line between this capacitance and this first transistor base stage, its P level ground connection.
5, intelligent transducer as claimed in claim 2, it is characterized in that, described monostable trigger module comprises a monostalbe trigger, one timing resistance and one is electric capacity regularly, wherein this monostalbe trigger comprises a timing resistance incoming end again, one timing electric capacity incoming end, one trigger end and an output terminal, this timing resistor is connected to this timing resistor incoming end of this monostalbe trigger, this timing capacitor is connected to this timing capacitor incoming end of this monostalbe trigger, this trigger end of this monostalbe trigger is connected to this microprocessor, and this output terminal of this monostalbe trigger is connected to the DAC digital to analog converter.
6, a kind of safety guard based on monostable circuit; it is arranged in the intelligent transducer; in order to detect the duty of the microprocessor in this intelligent transducer; and control the electric signal output of this intelligent transducer according to the duty of this microprocessor; it is characterized in that, should comprise based on the safety guard of monostable circuit:
One monostable trigger module, its input end is connected with this microprocessor, be used for receiving the reset pulse that this microprocessor sends, produce the system works normal signal, wherein, its input end is constantly received the refresh pulse from CPU, then produces a stable high level signal at output terminal, if surpass the reseting pulse signal that the setting-up time scope is not received this microprocessor, then its output terminal produces low level signal;
One DAC digital to analog converter, its input end is connected with the output terminal of this monostable trigger module, if its input end is detected is the stable high level signal of this monostable trigger module output, then its resetting pin is invalid inoperative, if its input end is detected is the low level signal of this monostable trigger module output, then its resetting pin works, and makes this DAC digital to analog converter reset, and its output current is restricted to a setting value.
7; safety guard based on monostable circuit as claimed in claim 6; it is characterized in that; described monostable trigger module can be a single-shot trigger circuit; it comprises a first transistor; one transistor seconds; one power end; one timing resistance and one is electric capacity regularly; the base stage of this first transistor is connected to this microprocessor; the collector of this first transistor connects the base stage of this transistor seconds; the grounded emitter of this first transistor; one end of this timing resistor is connected to this power end; the other end is connected on the line between the first transistor collector and the transistor seconds base stage; this timing capacitor one end ground connection; the other end is connected on the line between the first transistor collector and the transistor seconds base stage; the collector of this transistor seconds is connected to this DAC digital to analog converter, the grounded emitter of this transistor seconds.
8, the safety guard based on monostable circuit as claimed in claim 7; it is characterized in that; its single-shot trigger circuit also comprises a current-limiting resistance and a capacitance; this current-limiting resistance one end is connected to this microprocessor; the other end is connected with this capacitance one end, and the other end of this capacitance is connected with the base stage of this first transistor.
9, the safety guard based on monostable circuit as claimed in claim 8 is characterized in that, this single-shot trigger circuit also comprises a diode, and its N level is connected on the line between this capacitance and this first transistor base stage, its P level ground connection.
10; a kind of safety guard as claimed in claim 6 based on monostable circuit; it is characterized in that; this monostable trigger module comprises a monostalbe trigger; one timing resistance and one is electric capacity regularly; wherein this monostalbe trigger comprises a timing resistance incoming end again; one timing electric capacity incoming end; one trigger end and an output terminal; this timing resistor is connected to this timing resistor incoming end of this monostalbe trigger; this timing capacitor is connected to this timing capacitor incoming end of this monostalbe trigger; this trigger end of this monostalbe trigger is connected to this microprocessor, and this output terminal of this monostalbe trigger is connected to this DAC digital to analog converter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810200070A CN100587410C (en) | 2008-09-18 | 2008-09-18 | Intelligent transmitter and safety device based on monostable circuit |
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| CN200810200070A CN100587410C (en) | 2008-09-18 | 2008-09-18 | Intelligent transmitter and safety device based on monostable circuit |
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| CN101354268A true CN101354268A (en) | 2009-01-28 |
| CN100587410C CN100587410C (en) | 2010-02-03 |
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| CN200810200070A Active CN100587410C (en) | 2008-09-18 | 2008-09-18 | Intelligent transmitter and safety device based on monostable circuit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628697A (en) * | 2011-03-17 | 2012-08-08 | 兰州理工大学 | Method for dynamic memory of physical quantity and system thereof |
| CN102931713A (en) * | 2011-08-08 | 2013-02-13 | 李尔公司 | Charger system with safety guardian |
| CN104901279A (en) * | 2015-03-03 | 2015-09-09 | 无锡艾柯威科技有限公司 | Frequency conversion module protection circuit and protection method thereof |
| CN109141481A (en) * | 2018-09-30 | 2019-01-04 | 广州市捷众智能科技有限公司 | A kind of environmental parameter detection circuit |
| CN110244133A (en) * | 2019-06-26 | 2019-09-17 | 吉林大学 | A kind of single pulse width measuring circuit and measurement method |
| CN110265992A (en) * | 2019-06-03 | 2019-09-20 | 深圳市华讯方舟微电子科技有限公司 | A kind of false-touch prevention protection circuit, wireless data transmission module and unmanned plane |
| CN110672141A (en) * | 2018-07-03 | 2020-01-10 | 中国科学院苏州纳米技术与纳米仿生研究所 | Detection method and detection system of self-powered sensor |
| WO2023093269A1 (en) * | 2021-11-29 | 2023-06-01 | 广州汽车集团股份有限公司 | Vehicle mcu failure control circuit and method |
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2008
- 2008-09-18 CN CN200810200070A patent/CN100587410C/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628697A (en) * | 2011-03-17 | 2012-08-08 | 兰州理工大学 | Method for dynamic memory of physical quantity and system thereof |
| CN102931713A (en) * | 2011-08-08 | 2013-02-13 | 李尔公司 | Charger system with safety guardian |
| CN102931713B (en) * | 2011-08-08 | 2014-12-10 | 李尔公司 | Charger system with safety guardian |
| US8917054B2 (en) | 2011-08-08 | 2014-12-23 | Lear Corporation | Charger system with safety guardian |
| US9227521B2 (en) | 2011-08-08 | 2016-01-05 | Lear Corporation | Vehicle charger system with safety guardian |
| CN104901279A (en) * | 2015-03-03 | 2015-09-09 | 无锡艾柯威科技有限公司 | Frequency conversion module protection circuit and protection method thereof |
| CN110672141A (en) * | 2018-07-03 | 2020-01-10 | 中国科学院苏州纳米技术与纳米仿生研究所 | Detection method and detection system of self-powered sensor |
| CN110672141B (en) * | 2018-07-03 | 2021-11-30 | 中国科学院苏州纳米技术与纳米仿生研究所 | Detection method and detection system of self-powered sensor |
| CN109141481A (en) * | 2018-09-30 | 2019-01-04 | 广州市捷众智能科技有限公司 | A kind of environmental parameter detection circuit |
| CN110265992A (en) * | 2019-06-03 | 2019-09-20 | 深圳市华讯方舟微电子科技有限公司 | A kind of false-touch prevention protection circuit, wireless data transmission module and unmanned plane |
| CN110244133A (en) * | 2019-06-26 | 2019-09-17 | 吉林大学 | A kind of single pulse width measuring circuit and measurement method |
| WO2023093269A1 (en) * | 2021-11-29 | 2023-06-01 | 广州汽车集团股份有限公司 | Vehicle mcu failure control circuit and method |
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| Publication number | Publication date |
|---|---|
| CN100587410C (en) | 2010-02-03 |
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