CN220730371U - Alarm circuit for detecting abnormal closing of normally closed end of relay - Google Patents
Alarm circuit for detecting abnormal closing of normally closed end of relay Download PDFInfo
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- CN220730371U CN220730371U CN202322403130.7U CN202322403130U CN220730371U CN 220730371 U CN220730371 U CN 220730371U CN 202322403130 U CN202322403130 U CN 202322403130U CN 220730371 U CN220730371 U CN 220730371U
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- alarm circuit
- closed end
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- 230000002159 abnormal effect Effects 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 230000005856 abnormality Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The utility model provides an alarm circuit for detecting abnormal closing of a normally closed end of a relay, which comprises a detection circuit and a warning lamp, wherein the detection circuit is connected with the warning lamp, the detection circuit is connected with an automobile load, the detection circuit comprises a relay K1 and a triode group, the relay K1 is connected with the triode group, one end of the warning lamp is connected with the triode group, the other end of the warning lamp is grounded, the triode group is connected with a power supply, one end of the relay K1 is connected with the power supply, the other end of the relay K1 is grounded, and the other ends of the relay K1 are connected with the automobile load through connectors. The utility model adopts 2 PNP triodes to connect in series to detect the abnormality of the normally closed end of the relay, thereby increasing redundancy judgment, preventing the loop from being conducted by mistake, and preventing one triode from conducting because the two triodes are conducted simultaneously and the loop is conducted, thereby indirectly reducing the power consumption and simultaneously having smaller volume and being convenient to be installed in an automobile electrical box for use.
Description
Technical Field
The utility model relates to an alarm circuit, in particular to an alarm circuit for detecting abnormal closing of a normally-closed end of a relay.
Background
In the design application of an automobile electrical box, a relay and a fuse are important devices of a traditional fuse box, and have a vital role on an automobile. The failure of the relay may cause serious consequences, which may cause the owner to fail to start the vehicle, resulting in customer complaints.
Because the relay of current car is mostly direct welding on the inside PCB board of fuse box, when the vehicle breaks down, under the condition of not dismantling, can't directly perceivedly judge whether the relay takes place unusual and lead to the vehicle trouble, can't lock and get rid of the problem of relay, transport through the service station, maintenance master dismantles, can destroy service environment, lead to can't find final trouble, can't get rid of the factor of relay in the fuse box yet, bring the resistance for the sustained solution of problem, can't lock the problem, lead to the trouble probably repeatedly happening, the vehicle persists to have hidden danger, there is potential great loss. Therefore, an addition of a detection circuit is required to perform abnormality monitoring of the relay.
For example, the utility model patent with publication number CN206378569U provides a voltage relay abnormality detection device, which comprises a power module, an external circuit module, a voltage detection module, a resistance detection module and a response detection module, wherein the output ends of the external circuit module, the voltage detection module, the resistance detection module and the response detection module are connected with an analysis module, the analysis module is electrically connected with the input end of a control module, the output end of the control module is connected with a display module and an alarm module, and the control module is electrically connected with a communication module. The beneficial effects are that: according to the utility model, after the input and output voltage, the coil resistance and the coil response speed of the relay are comprehensively detected, fault alarm can be carried out according to the detection result, so that an operator can intuitively know fault information of the relay, remote communication can be carried out, the operator can conveniently carry out remote auxiliary analysis on faults, and the judging and processing efficiency of the faults of the relay is improved. But the device has a complex structure, high cost and large occupied volume.
For example, publication number CN204832441U is an automotive relay circuit detector comprising, for a four-wire relay: resistor, LED, button switch. For a five wire relay, the detector includes: the device comprises a resistor, a light emitting diode, a normally open switch, a normally closed switch and a button switch. On the basis of not damaging the original relay socket, the detector is inserted into the original relay socket, whether the automobile relay control circuit is good or not can be judged rapidly by observing whether the diode is lighted or not, and then the automobile relay main circuit can be judged accurately by pressing the button switch, so that the production efficiency of checking and judging the automobile relay circuit by automobile detection maintenance technicians is improved. However, the detector is mainly used for judging whether the circuit of the relay has faults or not, and can not judge whether the relay has faults or not, so that abnormal monitoring of the relay can not be realized.
Disclosure of Invention
Aiming at the technical problem that the existing relay abnormality detection device is large in size, the utility model provides an alarm circuit for detecting abnormal closing of the normally-closed end of a relay, which is easy to maintain, simple in structure, small in size and low in cost.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows: the utility model provides a detect alarm circuit that relay normally closed end is closed unusual, includes detection circuitry and warning light, and detection circuitry is connected with the warning light, and detection circuitry is connected with car circuit, and detection circuitry includes relay K1 and triode group, and the one end of warning light is connected with the triode group, and the other end ground connection of warning light, the other end ground connection of relay K1, and triode group and car load are connected with the other both ends of relay K1 through the connector.
The triode group comprises a triode Q1 and a triode Q2, wherein an emitter of the triode Q1 is connected with a power supply through a current limiting resistor R1, a base electrode of the triode Q1 is connected with a second execution end of a relay K1 through the current limiting resistor R2, a collector electrode of the triode Q1 is connected with an emitter electrode of the triode Q2, and a base electrode of the triode Q2 is connected with a second control end of the relay K1 through a current limiting resistor R3, and a collector electrode of the triode Q2 is connected with a warning lamp.
The relay K1 is a 5-pin switching relay, a first execution end of the relay K1 is connected with a power supply, an 85-point ground of the relay K1 is connected with a second execution end of the relay K1 and a second control end of the relay K1 are connected with a connector.
The warning lamp is a light emitting diode D1 or an LED lamp.
The triode Q1 and the triode Q2 are PNP triodes.
The beneficial effects of the utility model are as follows:
1. the utility model adopts 2 PNP triodes to connect in series to detect the abnormality of the normally-closed end of the relay, when the relay is abnormal, the two triodes can meet the conduction condition at the same time, and simultaneously, the two diodes are adopted to increase redundancy judgment, prevent the loop from being conducted by mistake, and because the two triodes are conducted at the same time, the loop is conducted, prevent one triode from conducting, and increase the fault tolerance of the alarm.
2. The alarm circuit provided by the utility model has smaller volume and is convenient to install in an automobile for use.
3. The utility model utilizes the on-off of the alarm lamp to indicate whether the relay has faults, thereby facilitating the vehicle owner to quickly know the cause of the faults of the vehicle.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.
As shown in FIG. 1, an alarm circuit for detecting abnormal closing of a normally closed end of a relay comprises a detection circuit and a warning lamp, wherein the detection circuit is connected with the warning lamp, the detection circuit is connected with an automobile circuit and comprises a relay K1 and a triode group, the relay K1 is connected with the triode group, one end of the warning lamp is connected with the triode group, the other end of the warning lamp is grounded, the triode group is connected with a power supply, one end of the relay K1 is connected with the power supply, the other end of the relay K1 is grounded, and the other ends of the relay K1 are connected with the automobile circuit. The detection circuit is mainly used for detecting whether abnormal closing exists in the automobile circuit, and the warning lamp is mainly used for warning when the relay has abnormal closing problems.
Specifically, triode group includes triode Q1 and triode Q2, triode Q1's projecting pole is connected with the power through current-limiting resistor R1, triode Q1's base is connected with relay K1's second execution end (i.e. 87a end) through current-limiting resistor R2, triode Q1's collecting electrode is connected with triode Q2's projecting pole, triode Q2's base is connected with relay K1's second control end (i.e. 86 pin) through current-limiting resistor R3, triode Q2's collecting electrode is connected with the warning light. The triodes Q1 and Q2 are PNP triodes, and the model numbers are BC807.
The triode Q1 is used as a switch of the luminous loop and is used for controlling the on-off of the loop, and the on-off of the Q1 is controlled by detecting the level of the second execution end of the relay. The triode Q2 is used as another switch of the luminous loop and is also used for controlling the on-off of the loop, and the on-off of the Q2 is controlled by detecting the level of the second control end of the relay.
The current limiting resistor R1 is used for limiting the current flowing through the triode and the LED loop, and preventing the overlarge current and the overlarge power consumption from damaging the components of the loop. The current limiting resistor R2 is used to limit the current of the base of the transistor Q1 and protect the transistor Q1. The current limiting resistor R3 is used to limit the current of the base electrode of the transistor Q2 and protect the transistor Q2.
The resistance values of the current-limiting resistor R1, the current-limiting resistor R2 and the current-limiting resistor R3 are 1k omega, and the package of the current-limiting resistor R1, the current-limiting resistor R2 and the current-limiting resistor R3 is 0805.
The relay K1 is a 5-pin conversion relay, a first execution end (namely a 30-pin) of the relay K1 is connected with a power supply, an 85-end ground of the relay K1 is grounded, and a second execution end and a second control end of the relay K1 are connected with a connector. The warning lamp can adopt a light emitting diode D1 or an LED lamp, and the power supply is a 12V power supply.
The working flow of the utility model is as follows:
when the relay K1 does not work, the level of the second control end of the relay K1 is equal to the low level of 85 pins, namely the base of the triode Q2 is low level, the emitter of the triode Q2 is B+ and the triode Q2 is PNP triode, so that the triode Q2 is on, if the relay is not abnormal, at the moment, the first execution end and the second execution end of the relay K1 are on, and the second execution end is high level because of the B+ of the first execution end, namely the base of the triode Q1 is high level, the emitter of the triode Q1 is high level, the triode Q1 is not conducted because the triode Q1 is PNP triode, and the triode Q1 is connected in series with the triode Q2, so that a loop is not conducted, no current flows in the light emitting diode D1 is not lighted.
When the relay K1 does not work, the level of the second control end of the relay K1 is equal to the low level of the 85 pins, namely the base of the triode Q2 is low level, the emission of the triode Q2 is B+ and is PNP triode, so that the triode Q2 is on, if the relay is abnormal, at the moment, the first execution end and the second execution end of the relay K1 are not on, the level of the second execution end is the low level of the A1 load end, namely the base of the triode Q1 is low level, the emission of the triode Q1 is high level, the triode Q1 is PNP triode, so that the triode Q1 is on, the triode Q1 is connected with the triode Q2 in series, the loop is on, and the light emitting diode D1 is electrified, namely the light emitting diode D1 is lighted, so that a user is intuitively reminded of poor contact between the first execution end and the second execution end of the relay.
When the relay K1 works, the level of the second control end of the relay K1 is high, namely the base electrode of the triode Q2 is high, and the triode Q2 is not turned on because the triode Q2 is a PNP triode; because the relay is attracted, the first executing end is not contacted with the second executing end, at the moment, the second executing end is at a low level of the A1 load end, namely, the base electrode of the triode Q1 is at a low level, because the triode Q1 is a PNP triode, the triode Q1 is connected with the triode Q2 in series, the collector electrode of the triode Q2 is not at a high level, namely, the emitter electrode of the triode Q1 is not at a high level, the triode Q1 is not conducted, the triode Q1 is connected with the triode Q2 in series, the triode Q1 and the triode Q2 are not conducted, no current flows in a loop, and therefore, the light emitting diode D1 is not in light, the triode does not consume current, and no power consumption is caused.
The utility model only lightens the light-emitting diode when the relay fails, and consumes weak current; when the relay works normally, the components of the alarm circuit do not work and have no power consumption.
The utility model adopts 2 PNP triodes to connect in series to detect the abnormality of the normally-closed end of the relay, when the relay is abnormal, the two triodes can meet the conduction condition simultaneously, and simultaneously, the two diodes are adopted to increase the redundancy judgment, prevent the loop from being conducted by mistake, and the loop is conducted only because the two triodes are conducted simultaneously, thus preventing one triode from conducting, increasing the fault tolerance of the alarm, and simultaneously, the utility model has smaller volume and is convenient to be installed in an automobile for use.
Meanwhile, the alarm circuit provided by the utility model has smaller volume, and the on/off of the alarm lamp is used for indicating whether the relay is faulty or not, so that the alarm circuit is convenient to install in an automobile for use, and a vehicle owner can conveniently and quickly know the reason of the vehicle fault.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (5)
1. The utility model provides a detect alarm circuit that relay normally closed end is closed unusual, its characterized in that, including detection circuitry and warning light, detection circuitry is connected with the warning light, and detection circuitry is connected with car circuit, and detection circuitry includes relay K1 and triode group, and the one end of warning light is connected with the triode group, and the other end ground connection of warning light, the other end ground connection of relay K1, and triode group and car load are connected with the other both ends of relay K1 through the connector.
2. The alarm circuit for detecting abnormal closing of the normally-closed end of the relay according to claim 1, wherein the triode group comprises a triode Q1 and a triode Q2, an emitter of the triode Q1 is connected with a power supply through a current limiting resistor R1, a base of the triode Q1 is connected with a second execution end of the relay K1 through a current limiting resistor R2, a collector of the triode Q1 is connected with an emitter of the triode Q2, and a base of the triode Q2 is connected with a second control end of the relay K1 through a current limiting resistor R3, and a collector of the triode Q2 is connected with a warning lamp.
3. The alarm circuit for detecting abnormal closing of the normally closed end of the relay according to claim 2, wherein the relay K1 is a 5-pin switching relay, a first executing end of the relay K1 is connected with a power supply, an 85-end ground of the relay K1, and a second executing end and a second control end of the relay K1 are connected with a connector.
4. The alarm circuit for detecting abnormal closing of the normally closed end of the relay according to claim 3, wherein the warning lamp is a light emitting diode D1 or an LED lamp.
5. The alarm circuit for detecting abnormal closing of the normally-closed end of the relay according to claim 3 or 4, wherein the transistor Q1 and the transistor Q2 are PNP transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322403130.7U CN220730371U (en) | 2023-09-05 | 2023-09-05 | Alarm circuit for detecting abnormal closing of normally closed end of relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322403130.7U CN220730371U (en) | 2023-09-05 | 2023-09-05 | Alarm circuit for detecting abnormal closing of normally closed end of relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220730371U true CN220730371U (en) | 2024-04-05 |
Family
ID=90484256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322403130.7U Active CN220730371U (en) | 2023-09-05 | 2023-09-05 | Alarm circuit for detecting abnormal closing of normally closed end of relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220730371U (en) |
-
2023
- 2023-09-05 CN CN202322403130.7U patent/CN220730371U/en active Active
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