CN107275157B - Relay moving part detection circuit and relay with same - Google Patents
Relay moving part detection circuit and relay with same Download PDFInfo
- Publication number
- CN107275157B CN107275157B CN201710605256.9A CN201710605256A CN107275157B CN 107275157 B CN107275157 B CN 107275157B CN 201710605256 A CN201710605256 A CN 201710605256A CN 107275157 B CN107275157 B CN 107275157B
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- relay
- electrically connected
- moving part
- voltage comparator
- power supply
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/08—Indicators; Distinguishing marks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
Abstract
The invention discloses a relay moving part detection circuit, which comprises a relay, a direct-current power supply voltage, a decision circuit, an action sensor and a signal output circuit, wherein the decision circuit comprises a moving part detection device, the moving part detection device comprises an infrared sensor and a first voltage comparator, and the action sensor is a relay moving part; the output end of the decision circuit is electrically connected with the signal output circuit, the front stage of the decision circuit is respectively electrically connected with the action sensor and the relay, the infrared sensor detects the position change of the moving part of the relay, and the decision circuit and the action sensor are respectively electrically connected with the voltage of the direct-current power supply; the decision circuit detects the position change of the relay moving part according to the infrared sensor, and then judges whether the relay contact is closed or not through the signal output indication of the signal output circuit. The position change state of the moving part of the relay can be effectively detected, the position of a fault point of a control system can be timely judged, and the circuit fault detection efficiency is improved.
Description
Technical Field
The invention relates to a relay, in particular to a relay for detecting the state of a moving part of the relay.
Background
A relay is a commonly used electric control device, and is an electric appliance that generates a predetermined step change in a controlled amount in an electric output circuit when a change in an input excitation amount meets a predetermined requirement. It has an interactive relationship between a control system or input loop and a controlled system or output loop. Generally, in an automatic control circuit, a relay is used as an "automatic switch" for controlling a large current operation through a small current in an actual circuit, and is widely used in many occasions, and plays roles of automatic adjustment, safety protection, circuit switching and the like in the circuit. Because the relay is an automatic switch element with an isolation function, the relay is widely applied to remote control, remote measurement, communication, automatic control, electromechanical integration, power electronic equipment and automobile electronic control elements, and is one of the most important control elements, and the existing relays are various, such as electromagnetic relays, optical relays and the like; relay elements are also used in the manufacture of motor vehicles, in order to effectively protect and control the electrical devices on board; however, the existing automobile relay only detects and tests the on-off of the relay contact before leaving the factory, and the relay itself does not have the self-detection on-off state and the fault state, and the relay is difficult to realize the self-detection on-off state and the fault state after being put into practical use as an electric control device, thereby not only easily causing circuit faults to appear, but also being capable of quickly and accurately judging the position of a fault point when the control circuit breaks down, bringing delay to the circuit fault detection and being not beneficial to the maintenance of the whole control system.
Disclosure of Invention
The invention provides a relay moving part detection circuit which can effectively detect the position change state of a relay moving part, can judge the position of a fault point of a control system in time and improve the circuit fault detection efficiency and a relay with the circuit, aiming at solving the problems that the existing relay does not have the defects of self-detection on-off state and fault state, so that the circuit fault is easy to occur, and the current situations that when the control circuit fails, the position of the fault point cannot be judged quickly and accurately, the circuit fault detection is delayed, the maintenance of the whole control system is not facilitated and the like.
The invention adopts the following specific technical scheme for solving the technical problems: a relay moving part detection circuit comprises a relay and a direct-current power supply voltage, and is characterized in that: the decision circuit comprises a moving part detection device, the moving part detection device comprises an infrared sensor and a first voltage comparator, and the action sensor is a relay moving part; the output end of the decision circuit is electrically connected with the signal output circuit, the front stage of the decision circuit is respectively electrically connected with the action sensor and the relay, the infrared sensor detects the position change of the moving part of the relay, and the decision circuit and the action sensor are respectively electrically connected with the voltage of the direct-current power supply; the decision circuit detects the position change of the relay moving part according to the infrared sensor and judges whether the relay contact is closed or not through the signal output indication of the signal output circuit; the decision circuit is characterized in that a control end sensor is arranged at the front stage of the decision circuit, the control end sensor adopts a photoelectric coupler, the decision circuit further comprises a control end sensor detection device, and the control end sensor detection device comprises a relay coil, a second voltage comparator and a third voltage comparator; the control end sensor detection device detects whether the relay coil is electrified or not, and then judges whether the relay is qualified or not through signal output indication of the signal output circuit. Whether the relay contact is closed or not is judged by measuring the position change of the moving component through the infrared sensor or whether the moving component is in the range of the correlation of the infrared sensor; the position change state of the moving part of the relay can be effectively detected, the position of a fault point of a control system can be timely judged, and the circuit fault detection efficiency is improved.
Preferably, the first voltage comparator is a first voltage comparator with the chip model number of LM393, a comparison input end IN + pin of the first voltage comparator is electrically connected with the direct-current power supply voltage, meanwhile, the comparison input end IN + pin of the first voltage comparator is connected with the tenth resistor IN series and then connected to the output end of the infrared sensor, and the other output end of the infrared sensor is connected with the twelfth resistor IN series and then electrically connected with the direct-current power supply voltage ground pole; one end of the input end of the infrared sensor is connected with the eleventh resistor IN series and then connected to the power supply end of the first voltage comparator, the other end of the input end of the infrared sensor is electrically connected with the voltage ground of the direct-current power supply, and the IN-pin of the comparison input end of the first voltage comparator is electrically connected with the signal output circuit. The motion change state of the moving part of the relay is effectively and automatically detected, when the control system is in a fault state, the position of a system fault point can be quickly and timely judged, the circuit fault detection efficiency is improved, the overhaul and maintenance of the whole control system are utilized, and the loss in multiple aspects caused by faults is reduced.
Preferably, the input end of the photoelectric coupler is connected with the two ends of the relay coil in series through a first resistor and a second resistor to form an input loop of the photoelectric coupler; the level output end of the photoelectric coupler is electrically connected with a pin of a comparison input end IN + of the third voltage comparator, and the other level output end of the photoelectric coupler is electrically connected with the positive pole of the direct-current power supply voltage through a third resistor connected IN series to form an output loop of the photoelectric coupler. Whether the relay is qualified or not is judged by monitoring whether the coil is electrified or not, and the relay fault judgment efficiency is improved.
Preferably, the third voltage comparator is a third voltage comparator with a chip model number of LM393, a comparison input end IN + pin of the third voltage comparator is electrically connected with a level output end of the optical coupler, a third resistor and a fourth resistor are connected IN series and then are connected IN parallel with the voltage of the direct-current power supply, a comparison output end of the third voltage comparator is electrically connected with a comparison input end IN + pin of the second voltage comparator, a comparison input end IN-pin of the third voltage comparator is electrically connected with an output end of the infrared sensor, a power supply end of the third voltage comparator is electrically connected with the voltage of the direct-current power supply through a ninth resistor and is electrically connected with the other output end of the infrared sensor after being connected IN series with a fifth resistor; one end of the input end of the infrared sensor is connected with the seventh resistor in series and then connected to the power end of the second voltage comparator, and the other end of the input end of the infrared sensor is electrically connected with the voltage ground of the direct-current power supply. The motion change state of the moving part of the relay is effectively and automatically detected, when the control system is in a fault state, the position of a system fault point can be quickly and timely judged, the circuit fault detection efficiency is improved, the overhaul and maintenance of the whole control system are utilized, and the loss in multiple aspects caused by faults is reduced.
Preferably, the dc power supply voltage is a vehicle power supply dc voltage. The voltage of the direct-current power supply is obtained conveniently, stably and reliably.
Preferably, the signal output circuit adopts an LED indication output circuit or a buzzer indication output. Convenient and effective prompt, and convenient for a user or a maintainer to quickly judge the on-off state of two ends of the relay contact.
Preferably, the LED indication output circuit adopts a sixth resistor and an LED light emitting diode connected IN series, one end of the sixth resistor is electrically connected to the IN-pin of the comparison input terminal of the first voltage comparator, the other end of the sixth resistor is electrically connected to the anode of the LED light emitting diode, and the cathode of the LED light emitting diode is electrically connected to the negative pole of the dc power supply voltage ground. The on-off state that appears at relay contact both ends is judged fast to user's or maintainer conveniently.
Another object of the present invention is to provide a relay, including a relay package case, wherein: the relay moving part detection circuit further comprises a relay finished product which is formed by jointly arranging the relay packaging shell, the relay coil, the relay contact, the relay moving part and the decision circuit into a whole. The position change state and the coil fault state of the moving part of the relay can be effectively detected, the position of a fault point of a control system can be timely judged, and the circuit fault detection efficiency is improved.
The invention has the beneficial effects that: whether the relay contact is closed or not is judged by measuring the position change of the moving component through the infrared sensor or whether the moving component is in the range of the correlation of the infrared sensor; in addition, whether the relay is qualified or not is judged by monitoring whether the coil is electrified or not; the position change state of the moving part of the relay can be effectively detected, the position of a fault point of a control system can be timely judged, and the circuit fault detection efficiency is improved.
Description of the drawings:
the invention is described in further detail below with reference to the figures and the detailed description.
Fig. 1 is a schematic diagram of a circuit principle structure of the moving part detection circuit of the relay and the relay with the circuit.
Fig. 2 is a schematic diagram of another circuit principle structure of the moving part detection circuit of the relay and the relay with the circuit.
Fig. 3 is a schematic diagram of a circuit structure of the moving part detection circuit of the relay and the relay with the circuit of the invention.
Fig. 4 is a schematic diagram of another circuit structure of the moving part detection circuit of the relay and the relay having the same according to the present invention.
Detailed Description
Example 1:
in the embodiment shown in fig. 1 and 3, a relay moving part detection circuit comprises a relay 10 and a dc power supply voltage 20, and further comprises a decision circuit 30, an action sensor 40 and a signal output circuit 50, wherein the decision circuit 30 comprises a moving part detection device, the moving part detection device comprises an infrared sensor 70 and a voltage comparator IC1, and the action sensor 40 is a relay moving part 41; the output end of the decision circuit 30 is electrically connected with the signal output circuit 50, the front stage of the decision circuit 30 is respectively electrically connected with the action sensor 40 and the relay 10, the infrared sensor 70 detects the position change of the relay moving part 41, and the decision circuit 30 and the action sensor 40 are respectively electrically connected with the direct-current power supply voltage 20; the decision circuit 30 detects the position change of the relay moving part 41 according to the infrared sensor 70, and then judges whether the contact of the relay 10 is closed or not through the signal output instruction of the signal output circuit 50.
The dc power supply voltage 20 is a vehicle power supply dc voltage. The first voltage comparator IC1 adopts a first voltage comparator with the chip model number LM393, a comparison input end IN + pin of the first voltage comparator is electrically connected with the DC power supply voltage of 12V/24V, meanwhile, a comparison input end IN + pin of the first voltage comparator IC1 is connected with a tenth resistor R10 IN series and then connected to the output end of the infrared sensor 70, and the other output end of the infrared sensor 70 is connected with a twelfth resistor R12 IN series and then electrically connected with the DC power supply voltage ground; one end of the input end of the infrared sensor 70 is connected with an eleventh resistor R11 IN series and then connected to the power supply end of the first voltage comparator IC1, the other end of the input end of the infrared sensor 70 is electrically connected with the 12V/24V ground of the direct-current power supply voltage, and the IN-pin of the comparison input end of the first voltage comparator IC1 is electrically connected with the signal output circuit.
The signal output circuit 50 adopts an LED indication output circuit or a buzzer indication output. The LED indication output circuit adopts a sixth resistor R6 and an LED light-emitting diode which are connected IN series, one end of the sixth resistor R6 is electrically connected with the IN-pin of the comparison input end of the first voltage comparator IC1, the other end of the sixth resistor R6 is electrically connected with the anode of the LED light-emitting diode, and the cathode of the LED light-emitting diode is electrically connected with the ground of the direct-current power supply voltage. Two ends AB of a coil of the relay KA are electrically connected with a direct-current power supply voltage of 12V/24V, and two contacts CD of the relay KA are connected with a load R after being connected with a power supply. Whether the relay contact is closed or not is judged by measuring the position change of the moving component or whether the moving component is in the range of the correlation of the infrared sensor through the infrared sensor.
Example 2:
in the embodiment shown in fig. 2 and 4, the front stage of the decision circuit 30 is electrically connected with the control end sensor 40, the control end sensor 40 adopts a photoelectric coupler 80, and the decision circuit further comprises a control end sensor detection device, and the control end sensor detection device comprises a relay coil AB, a second voltage comparator IC2 and a third voltage comparator IC 3; the control end sensor 40 detects whether the relay coil AB is electrified or not, and then judges whether the relay 10 is qualified or not through the signal output indication of the signal output circuit 50. The input end of the photoelectric coupler 80 is connected with the two ends of the relay coil AB in series through a first resistor R1 and a second resistor R2 to form an input loop of the photoelectric coupler 80; the level output end F of the photoelectric coupler 80 is electrically connected with the comparison input end IN + pin IN +1 of the third voltage comparator CI3, and the other level output end of the photoelectric coupler 80 is electrically connected with the positive pole of the dc power supply voltage 12V/24V after being connected IN series through a third resistor R3, so as to form an output loop of the photoelectric coupler 80. A third voltage comparator IC3 adopts a third voltage comparator with a chip model number LM393, a comparison input end IN + pin of a third voltage comparator IC3 is electrically connected with a level output end F of the optical coupler 80, a third resistor R3 and a fourth resistor R4 are connected IN series and then are connected with a direct-current power supply voltage 12V/24V IN parallel, a comparison output end OUT1+ of the third voltage comparator IC3 is electrically connected with a comparison input end IN + pin of a second voltage comparator IC2, a comparison input end IN-pin of the third voltage comparator IC3 is electrically connected with an output end H pin of the infrared sensor, a power supply end VCC of the third voltage comparator IC3 is electrically connected with the direct-current power supply voltage 12V/24V through a ninth resistor R9 and is electrically connected with the other output end of the infrared sensor 80 after being connected with a fifth resistor R5 IN series; one end of the input end of the infrared sensor 80 is connected with a seventh resistor R7 in series and then connected to a power supply end VCC of a second voltage comparator IC2, and the other end of the input end of the infrared sensor 80 is electrically connected with a 12V/24V direct-current power supply voltage ground electrode. The rest is the same as in example 1. Whether the relay contact is closed or not is judged by measuring the position change of the moving part through the infrared sensor or whether the moving part is in the range of the infrared sensor correlation, and whether the relay is qualified or not is judged by judging whether the monitoring coil is electrified or not.
Example 3:
a relay comprises a relay packaging shell and a relay moving part detection circuit in embodiment 1 or embodiment 2, wherein the relay packaging shell, a relay coil, a relay contact, a relay moving part and a decision circuit are arranged together to form an integrated relay finished product.
The foregoing summary and structure are provided to explain the principles, general features, and advantages of the product and to enable others skilled in the art to understand the invention. The foregoing examples and description have been presented to illustrate the principles of the invention and are intended to provide various changes and modifications within the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A relay moving part detection circuit comprises a relay and a direct-current power supply voltage, and is characterized in that: the decision circuit comprises a moving part detection device, the moving part detection device comprises an infrared sensor and a first voltage comparator, and the action sensor is a relay moving part; the output end of the decision circuit is electrically connected with the signal output circuit, the front stage of the decision circuit is respectively electrically connected with the action sensor and the relay, the infrared sensor detects the position change of the moving part of the relay, and the decision circuit and the action sensor are respectively electrically connected with the voltage of the direct-current power supply; the decision circuit detects the position change of the relay moving part according to the infrared sensor and judges whether the relay contact is closed or not through the signal output indication of the signal output circuit; the decision circuit is characterized in that a control end sensor is arranged at the front stage of the decision circuit, the control end sensor adopts a photoelectric coupler, the decision circuit further comprises a control end sensor detection device, and the control end sensor detection device comprises a relay coil, a second voltage comparator and a third voltage comparator; the control end sensor detection device detects whether the relay coil is electrified or not, and then judges whether the relay is qualified or not through signal output indication of the signal output circuit.
2. The relay moving part detecting circuit according to claim 1, wherein: the first voltage comparator is a first voltage comparator with the chip model number being LM393, a comparison input end IN + pin of the first voltage comparator is electrically connected with the direct-current power supply voltage, meanwhile, the comparison input end IN + pin of the first voltage comparator is connected with a tenth resistor IN series and then connected to the output end of the infrared sensor, and the other output end of the infrared sensor is connected with a twelfth resistor IN series and then electrically connected with the direct-current power supply voltage ground pole; one end of the input end of the infrared sensor is connected with the eleventh resistor IN series and then connected to the power supply end of the first voltage comparator, the other end of the input end of the infrared sensor is electrically connected with the voltage ground of the direct-current power supply, and the IN-pin of the comparison input end of the first voltage comparator is electrically connected with the signal output circuit.
3. The relay moving part detecting circuit according to claim 1, wherein: the input end of the photoelectric coupler is connected with the two ends of the relay coil in series through a first resistor and a second resistor to form an input loop of the photoelectric coupler; the level output end of the photoelectric coupler is electrically connected with a pin of a comparison input end IN + of the third voltage comparator, and the other level output end of the photoelectric coupler is electrically connected with the positive pole of the direct-current power supply voltage through a third resistor connected IN series to form an output loop of the photoelectric coupler.
4. The relay moving part detecting circuit according to claim 1, wherein: the third voltage comparator is a third voltage comparator with the model number of LM393, a comparison input end IN + pin of the third voltage comparator is electrically connected with a level output end of the photoelectric coupler, a third resistor and a fourth resistor are connected IN series and then are connected IN parallel with the voltage of the direct-current power supply, a comparison output end of the third voltage comparator is electrically connected with a comparison input end IN + pin of the second voltage comparator, a comparison input end IN-pin of the third voltage comparator is electrically connected with an output end of the infrared sensor, a power supply end of the third voltage comparator is electrically connected with the voltage of the direct-current power supply through a ninth resistor and is also electrically connected with the other output end of the infrared sensor after being connected IN series with a fifth resistor; one end of the input end of the infrared sensor is connected with the seventh resistor in series and then connected to the power end of the second voltage comparator, and the other end of the input end of the infrared sensor is electrically connected with the voltage ground of the direct-current power supply.
5. The relay moving part detecting circuit according to claim 1, wherein: the direct current power supply voltage adopts the direct current voltage of the vehicle power supply.
6. The relay moving part detecting circuit according to claim 1 or 2, wherein: the signal output circuit adopts an LED indication output circuit or a buzzer for indication output.
7. The relay moving part detecting circuit according to claim 6, wherein: the LED indication output circuit adopts a sixth resistor and an LED light-emitting diode which are connected IN series, one end of the sixth resistor is electrically connected with a comparison input end IN-pin of the first voltage comparator, the other end of the sixth resistor is electrically connected with the anode of the LED light-emitting diode, and the cathode of the LED light-emitting diode is electrically connected with the voltage ground pole of the direct-current power supply.
8. A relay, comprising a relay enclosure, characterized in that: the relay moving part detection circuit further comprises a relay finished product which is formed by jointly arranging the relay packaging shell, the relay coil, the relay contact, the relay moving part and the decision circuit into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710605256.9A CN107275157B (en) | 2017-07-24 | 2017-07-24 | Relay moving part detection circuit and relay with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710605256.9A CN107275157B (en) | 2017-07-24 | 2017-07-24 | Relay moving part detection circuit and relay with same |
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| CN107275157A CN107275157A (en) | 2017-10-20 |
| CN107275157B true CN107275157B (en) | 2020-05-26 |
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| CN201710605256.9A Active CN107275157B (en) | 2017-07-24 | 2017-07-24 | Relay moving part detection circuit and relay with same |
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| CN109031107B (en) * | 2018-07-13 | 2023-10-03 | 浙江英洛华新能源科技有限公司 | Electronic auxiliary contact circuit for detecting on-off of high-voltage relay contact |
| CN112539930B (en) * | 2020-12-07 | 2022-04-19 | 中国长江电力股份有限公司 | GIS/GCB circuit breaker three-phase opening and closing state monitoring device and using method |
| CN113539751B (en) * | 2021-06-02 | 2022-03-22 | 中汇瑞德电子（芜湖）有限公司 | Contact monitoring device of high-voltage direct-current relay |
| CN113483787B (en) * | 2021-07-19 | 2024-03-01 | 浙江国自机器人技术股份有限公司 | Controlled device and state detection circuit of safe touch edge sensor thereof |
| CN113922336A (en) * | 2021-09-10 | 2022-01-11 | 青岛海信日立空调系统有限公司 | Frequency converter protection device, frequency converter and air conditioner |
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| US4914315A (en) * | 1987-06-10 | 1990-04-03 | Bayerische Motoren Werke Ag | Method for loosening the contacts of a sticking relay as well as circuit arrangement for carrying out the method |
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