CN2814762Y - Vehicle load electric control switch with short-circuit and open-circuit predetection - Google Patents
Vehicle load electric control switch with short-circuit and open-circuit predetection Download PDFInfo
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- CN2814762Y CN2814762Y CN 200520033542 CN200520033542U CN2814762Y CN 2814762 Y CN2814762 Y CN 2814762Y CN 200520033542 CN200520033542 CN 200520033542 CN 200520033542 U CN200520033542 U CN 200520033542U CN 2814762 Y CN2814762 Y CN 2814762Y
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Abstract
The utility model relates to a vehicle load electric control switch with short-circuit and open-circuit pre-detection, which is composed of an electric control switch, a signal source, a restrictor, a prediction switch, a reference voltage circuit for detecting short circuit, a reference voltage circuit for detecting open circuit, a comparator 1 and a comparator 2, wherein the signal source, the restrictor and load to be detected form a voltage division circuit converting the resistance quantity of the load to be detected into voltage signals which are respectively input into one input end of the comparator 1 and the comparator 2 through a voltage division way. The reference voltage circuit for detecting short circuit gives a short-circuit reference voltage which is input into the other input end of the comparator 1, and the reference voltage circuit for detecting open circuit gives an open-circuit reference voltage which is input into the other input end of the comparator 2. Whether the load to be detected is a circuit, a short circuit or an open circuit is determined through early warning signals input by the comparator 1 and the comparator 2, and then the prediction switch is switched off. When a vehicle power supply is switched on, the utility model can pre-detect the load situation and can obtain the early warning signals that whether the load to be detected is in the short-circuit situation or the open-circuit situation on the output end of the circuit, and then the electric control switch is controlled according to the early warning signals; as a result, the function of protecting the electric control switch is performed.
Description
Technical field
The utility model relates to automobile load electric-controlled switch, especially a kind of automobile load electric-controlled switch with short circuit, open circuit pre-detection.
Background technology
At present, before automobile power source starts or before electric-controlled switch is opened, load might be to be in short circuit or open-circuit condition, and known automobile electrically-controlled switch does not have load short circuits, the function of open circuit pre-detection, and can not be to load short circuits, open circuit sends early warning signal, if load on the preceding just short circuit that powers on, the big electric current of powered on moment just may the damage car electric-controlled switch, if just short circuit of load before opening electric-controlled switch, remove to open electric-controlled switch again, electric-controlled switch also can be damaged, in addition, automobile power source is before startup or before electric-controlled switch opens, if load is when being in open-circuit condition, the driver can not obtain alarm signal after starting automobile power source or when opening electric-controlled switch.
Summary of the invention
The purpose of this utility model provides a kind of automobile load electric-controlled switch with short circuit, open circuit pre-detection, can carry out short circuit, open circuit pre-detection to the automobile load when automobile power source one is opened, and the output early warning signal, thereby electric-controlled switch is played the effect of protection.
In order to achieve the above object, the technical solution of the utility model is: a kind of band short circuit, the automobile load electric-controlled switch of open circuit pre-detection, described automobile load electric-controlled switch is made of pre-detection circuit and electric-controlled switch, wherein pre-detection circuit and the electric-controlled switch load to be measured that is connected in parallel, described pre-detection circuit is by signal source, flow restricter, pre-slowdown monitoring switch, survey the short circuit reference voltage circuit, survey the open circuit reference voltage circuit, comparator 1, comparator 2 constitutes, after wherein pre-slowdown monitoring switch receives enable signal, the prediction switch conduction, signal source, flow restricter and load to be measured formation bleeder circuit are converted to the input that voltage signal is input to comparator 1 and comparator 2 respectively with the resistance of load to be measured by the dividing potential drop mode, survey another input of the given short circuit reference voltage input comparator 1 of short circuit reference voltage circuit, survey another input of the given open circuit reference voltage input comparator 2 of open circuit reference voltage circuit, early warning signal by comparator 1 and comparator 2 outputs determines that load to be measured is a path, short circuit or open circuit disconnect pre-slowdown monitoring switch then.If load is a path, then can give the electric-controlled switch switching signal, the electric-controlled switch conducting, loaded work piece is if short circuit or open circuit then can not be given the electric-controlled switch switching signal, in order to avoid damage electric-controlled switch.
Automobile power source is opened, electric-control system provides enable signal on the car, prediction switch conduction in this programme, signal source, flow restricter, load to be measured forms bleeder circuit, the resistance of load to be measured is converted to voltage signal by the dividing potential drop mode is input to the negative terminal of comparator 1 and the anode of comparator 2 respectively, the anode of comparator 1 given one survey the short circuit reference voltage, the negative terminal of comparator 2 given one survey the open circuit reference voltage, under the normal situation of load, comparator 1 and comparator 2 be output low level all, can give electric-controlled switch switching signal, electric-controlled switch conducting, loaded work piece, if comparator 1 upset, output high level, then load short circuits, can not make the electric-controlled switch conducting to switching signal, avoid damaging load, if comparator 2 upset, the output high level, then load open circuit does not make the electric-controlled switch conducting to switching signal.
The utility model has the advantages that: automobile power source one is opened; the utility model is just made pre-detection to the situation of load; output at circuit can obtain judging whether load to be measured is in the early warning signal of short circuit or open circuit; if short circuit or the open circuit do not open electric-controlled switch, thereby electric-controlled switch is played the effect of protection.
Description of drawings
In conjunction with the embodiments the utility model is described
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is a circuit diagram of the present utility model.
Embodiment
The short circuit of the utility model band, automobile load electric-controlled switch such as Fig. 1 of open circuit pre-detection, shown in Figure 2: described automobile load electric-controlled switch is made of pre-detection circuit and electric-controlled switch, wherein pre-detection circuit and the electric-controlled switch load to be measured that is connected in parallel, described pre-detection circuit is by signal source, flow restricter, pre-slowdown monitoring switch, survey the short circuit reference voltage circuit, survey the open circuit reference voltage circuit, comparator 1, comparator 2 constitutes, after wherein pre-slowdown monitoring switch receives enable signal, the prediction switch conduction, signal source, flow restricter and load to be measured formation bleeder circuit are converted to the input that voltage signal is input to comparator 1 and comparator 2 respectively with the resistance of load to be measured by the dividing potential drop mode, survey another input of the given short circuit reference voltage input comparator 1 of short circuit reference voltage circuit, survey another input of the given open circuit reference voltage input comparator 2 of open circuit reference voltage circuit, early warning signal by comparator 1 and comparator 2 outputs determines that load to be measured is a path, short circuit or open circuit disconnect pre-slowdown monitoring switch then.If load is a path, then can give the electric-controlled switch switching signal, the electric-controlled switch conducting, loaded work piece is if short circuit or open circuit then can not be given the electric-controlled switch switching signal, in order to avoid damage electric-controlled switch.Described load RL to be measured is an electrical apparatus for vehicle use.
See that Fig. 2 as can be known: the signal source VCC in the described bleeder circuit, flow restricter R1, D1, load RL to be measured and 1 series connection of prediction K switch, the common port of flow restricter (R1) and prediction K switch 1 is through isolation resistance R9, and isolation resistance R8 connects the negative terminal of comparator 1 IC4A and the anode of comparator 2 IC4B respectively.K2 is an electric-controlled switch described in the utility model.
See that Fig. 2 also as can be known: described survey short circuit reference voltage circuit is made of the 5th divider resistance R5, the 6th divider resistance R6, isolation resistance R7, wherein the 5th divider resistance R5, the 6th divider resistance R6 are connected between signal source VCC and the ground GND, and the common port of the 5th divider resistance R5, the 6th divider resistance R6 connects the anode of comparator 1 IC4A by isolation resistance R7.
See that Fig. 2 also as can be known: described survey open circuit reference voltage circuit is made of the second divider resistance R2, the 3rd divider resistance R3, isolation resistance R4, wherein the second divider resistance R2, the 3rd divider resistance R3 are connected between signal source VCC and the ground GND, and the common port of the second divider resistance R2, the 3rd divider resistance R3 connects the negative terminal of comparator 2 IC4B by isolation resistance R4.
The utility model is work like this, the enable signal input, 1 conducting of prediction K switch, signal source VCC, flow restricter R1, D1, prediction K switch 1 and load RL to be measured form bleeder circuit, the resistance of load RL to be measured is converted to voltage signal by the dividing potential drop mode, this voltage signal is input to the negative terminal of comparator 1 IC4A through isolation resistance R9, this voltage signal also is input to the anode of comparator 2 IC4B through isolation resistance R8, the 5th divider resistance R5, the voltage signal that the survey short circuit reference voltage circuit that the 6th divider resistance R6 forms provides is through the anode of isolation resistance R7 input comparator 1 IC4A, the second divider resistance R2, the voltage signal that the survey open circuit reference voltage circuit that the 3rd divider resistance R3 forms provides is through the negative terminal of isolation resistance R4 input comparator 2IC4B, under the path situation, the negative terminal voltage of comparator 1 IC4A and comparator 2 IC4B all is higher than positive terminal voltage, and therefore the output of two comparators all is a low level " 0 "; When load RL short circuit to be measured, applied signal voltage reduces, and the positive terminal voltage of comparator 1 IC4A is higher than negative terminal voltage, comparator 1 IC4A upset, and the short circuit early warning signal of output is high level " 1 ", this moment, the output of comparator 2 IC4B still was low level; When load RL to be measured opened a way, applied signal voltage increased, and the positive terminal voltage of comparator 2 IC4B is higher than negative terminal voltage, comparator 2 IC4B upset, and the open circuit early warning signal of output is high level " 1 ", this moment, the output of comparator 1 IC4A still was low level; Obtain disconnecting prediction K switch 1 behind the early warning signal, short circuit early warning signal and open circuit early warning signal according to comparator output terminal output, can judge that load RL to be measured is path, short circuit or open circuit, if load RL to be measured is a path, then can give electric-controlled switch K2 switching signal, electric-controlled switch K2 conducting, load RL work to be measured, if load RL to be measured short circuit or open circuit then can not be given electric-controlled switch K2 switching signal, in order to avoid damage electric-controlled switch.
Claims (5)
1, a kind of band short circuit, the automobile load electric-controlled switch of open circuit pre-detection, it is characterized in that: described automobile load electric-controlled switch is made of pre-detection circuit and electric-controlled switch, wherein pre-detection circuit and the electric-controlled switch load to be measured that is connected in parallel, described pre-detection circuit is by signal source, flow restricter, pre-slowdown monitoring switch, survey the short circuit reference voltage circuit, survey the open circuit reference voltage circuit, comparator 1, comparator 2 constitutes, after wherein pre-slowdown monitoring switch receives enable signal, the prediction switch conduction, signal source, flow restricter and load to be measured formation bleeder circuit are converted to the input that voltage signal is input to comparator 1 and comparator 2 respectively with the resistance of load to be measured by the dividing potential drop mode, survey another input of the given short circuit reference voltage input comparator 1 of short circuit reference voltage circuit, survey another input of the given open circuit reference voltage input comparator 2 of open circuit reference voltage circuit, determine that by the early warning signal of comparator 1 and comparator 2 outputs load to be measured is a path at last, short circuit or open circuit.
The automobile load electric-controlled switch of 2, band short circuit according to claim 1, open circuit pre-detection, it is characterized in that: the signal source in the described bleeder circuit (VCC), flow restricter (R1, D1), load to be measured (RL) and pre-slowdown monitoring switch (K1) series connection, the common port of flow restricter (R1) and pre-slowdown monitoring switch (K1) is through isolation resistance (R9), and isolation resistance (R8) connects the negative terminal of comparator 1 (IC4A) and the anode of comparator 2 (IC4B) respectively.
The automobile load electric-controlled switch of 3, band short circuit according to claim 1, open circuit pre-detection, it is characterized in that: described survey short circuit reference voltage circuit is made of the 5th divider resistance (R5), the 6th divider resistance (R6), isolation resistance (R7), wherein the 5th divider resistance (R5), the 6th divider resistance (R6) are connected between signal source (VCC) and the ground (GND), and the common port of the 5th divider resistance (R5), the 6th divider resistance (R6) connects the anode of comparator 1 (IC4A) by isolation resistance (R7).
The automobile load electric-controlled switch of 4, band short circuit according to claim 1, open circuit pre-detection, it is characterized in that: described survey open circuit reference voltage circuit is made of second divider resistance (R2), the 3rd divider resistance (R3), isolation resistance (R4), wherein second divider resistance (R2), the 3rd divider resistance (R3) are connected between signal source (VCC) and the ground (GND), and the common port of second divider resistance (R2), the 3rd divider resistance (R3) connects the negative terminal of comparator 2 (IC4B) by isolation resistance (R4).
The automobile load electric-controlled switch of 5, band short circuit according to claim 1 and 2, open circuit pre-detection is characterized in that: described load to be measured (RL) is electrical apparatus for vehicle use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520033542 CN2814762Y (en) | 2005-03-17 | 2005-03-17 | Vehicle load electric control switch with short-circuit and open-circuit predetection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520033542 CN2814762Y (en) | 2005-03-17 | 2005-03-17 | Vehicle load electric control switch with short-circuit and open-circuit predetection |
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| Publication Number | Publication Date |
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| CN2814762Y true CN2814762Y (en) | 2006-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520033542 Expired - Fee Related CN2814762Y (en) | 2005-03-17 | 2005-03-17 | Vehicle load electric control switch with short-circuit and open-circuit predetection |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527446B (en) * | 2009-03-31 | 2011-12-21 | 北京易斯路电子有限公司 | Protection circuit applied to controller |
| CN103698652A (en) * | 2013-12-30 | 2014-04-02 | 上海自动化仪表股份有限公司 | Thermal resistor open circuit detection method |
| CN103913668A (en) * | 2014-03-21 | 2014-07-09 | 东风商用车有限公司 | AD signal or switch signal processing and diagnosis circuit |
| CN105372552A (en) * | 2015-12-10 | 2016-03-02 | 南京康尼电子科技有限公司 | Load open circuit detection circuit and method for high-side switch |
| CN105841776A (en) * | 2015-01-15 | 2016-08-10 | 佛山市顺德区美的电热电器制造有限公司 | Water level detection circuit, self-checking method thereof, and cooking utensil |
| CN109239583A (en) * | 2018-10-22 | 2019-01-18 | 上海艾为电子技术股份有限公司 | Detect the circuit of pin floating state |
| CN109387778A (en) * | 2017-08-10 | 2019-02-26 | 联合汽车电子有限公司 | Digital switch detection circuit and method |
| CN110350473A (en) * | 2018-04-03 | 2019-10-18 | 中兴通讯股份有限公司 | A kind of control circuit, method and device |
| CN110870944A (en) * | 2018-08-29 | 2020-03-10 | 苏州景昱医疗器械有限公司 | Nerve stimulator and overvoltage protection method thereof |
| CN114347790A (en) * | 2021-02-26 | 2022-04-15 | 华为数字能源技术有限公司 | High-voltage interlocking detection circuit and electronic equipment |
| CN114895107A (en) * | 2022-04-13 | 2022-08-12 | 无锡盛景微电子股份有限公司 | Resistance detection system and method for electronic detonator |
-
2005
- 2005-03-17 CN CN 200520033542 patent/CN2814762Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527446B (en) * | 2009-03-31 | 2011-12-21 | 北京易斯路电子有限公司 | Protection circuit applied to controller |
| CN103698652A (en) * | 2013-12-30 | 2014-04-02 | 上海自动化仪表股份有限公司 | Thermal resistor open circuit detection method |
| CN103913668A (en) * | 2014-03-21 | 2014-07-09 | 东风商用车有限公司 | AD signal or switch signal processing and diagnosis circuit |
| CN103913668B (en) * | 2014-03-21 | 2016-08-17 | 东风商用车有限公司 | AD signal or switch signal processing and diagnosis circuit |
| CN105841776A (en) * | 2015-01-15 | 2016-08-10 | 佛山市顺德区美的电热电器制造有限公司 | Water level detection circuit, self-checking method thereof, and cooking utensil |
| CN105372552A (en) * | 2015-12-10 | 2016-03-02 | 南京康尼电子科技有限公司 | Load open circuit detection circuit and method for high-side switch |
| CN109387778A (en) * | 2017-08-10 | 2019-02-26 | 联合汽车电子有限公司 | Digital switch detection circuit and method |
| CN110350473B (en) * | 2018-04-03 | 2022-08-12 | 中兴通讯股份有限公司 | Control circuit, method and device |
| CN110350473A (en) * | 2018-04-03 | 2019-10-18 | 中兴通讯股份有限公司 | A kind of control circuit, method and device |
| CN110870944A (en) * | 2018-08-29 | 2020-03-10 | 苏州景昱医疗器械有限公司 | Nerve stimulator and overvoltage protection method thereof |
| CN109239583A (en) * | 2018-10-22 | 2019-01-18 | 上海艾为电子技术股份有限公司 | Detect the circuit of pin floating state |
| CN114347790A (en) * | 2021-02-26 | 2022-04-15 | 华为数字能源技术有限公司 | High-voltage interlocking detection circuit and electronic equipment |
| CN114347790B (en) * | 2021-02-26 | 2023-10-20 | 华为数字能源技术有限公司 | High-voltage interlocking detection circuit and electronic equipment |
| CN114895107A (en) * | 2022-04-13 | 2022-08-12 | 无锡盛景微电子股份有限公司 | Resistance detection system and method for electronic detonator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |