CN220490990U - Test circuit for relay driving circuit - Google Patents
Test circuit for relay driving circuit Download PDFInfo
- Publication number
- CN220490990U CN220490990U CN202321832314.9U CN202321832314U CN220490990U CN 220490990 U CN220490990 U CN 220490990U CN 202321832314 U CN202321832314 U CN 202321832314U CN 220490990 U CN220490990 U CN 220490990U
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- voltage
- sampling
- circuit
- driving circuit
- relay driving
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- 238000005070 sampling Methods 0.000 claims abstract description 118
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000007689 inspection Methods 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 22
- 230000005669 field effect Effects 0.000 claims description 8
- 238000012795 verification Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- Measurement Of Current Or Voltage (AREA)
Abstract
The present utility model provides a test circuit for a relay driving circuit, the test circuit for a relay driving circuit including: each voltage sampling circuit comprises a sampling resistor and a voltage detection module, the sampling resistor is electrically connected with the relay driving circuit, and the voltage detection module is used for detecting the voltage of the sampling resistor and outputting the sampling voltage; a multiplexer including a plurality of channel input ports connected to the plurality of voltage sampling circuits and a channel output port for outputting the sampling voltage of one of the plurality of voltage samples one by one; and the power management module is used for providing electric energy for the multiplexer. The inspection circuit for the relay driving circuit can effectively save input and output channels and save cost.
Description
Technical Field
The utility model relates to the field of new energy automobiles, in particular to a test circuit for a relay driving circuit.
Background
Electric automobile is the new energy trade advocated by the nation. As an automobile that operates on electric power, a battery system (refer to a power source of an electric automobile) is a core component of the electric automobile. The electronic unit modules integrated in the electric automobile body are many, low-voltage components are generally smaller than 36v, and the important relay driving circuit is required to be subjected to voltage real-time stoping so as to detect the running state of the circuit.
In the prior art, aiming at the problem that the detection flexibility of a relay driving circuit is not high, one driving circuit needs to consume one input and output channel to output a detection result, and a large number of input and output channels (hardware simulation IO port channels) need to be consumed.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provide a checking circuit for a relay driving circuit, which can effectively save input and output channels and save cost.
In order to solve the above-described problems, the present utility model provides a test circuit for a relay driving circuit, the test circuit for a relay driving circuit including:
each voltage sampling circuit comprises a sampling resistor and a voltage detection module, the sampling resistor is electrically connected with the relay driving circuit, and the voltage detection module is used for detecting the voltage of the sampling resistor and outputting the sampling voltage;
a multiplexer including a plurality of channel input ports connected to the plurality of voltage sampling circuits and a channel output port for outputting the sampling voltage of one of the plurality of voltage samples one by one;
and the power management module is used for providing electric energy for the multiplexer.
Further, the inspection circuit is characterized by further comprising:
a main control unit connected to the control ports of the multiplexer to select one of the plurality of channel input ports to interface with the channel output port one by one;
the power management module is also connected with the main control unit to supply power to the main control unit.
Further, the multiplexer further includes:
the micro control unit is connected with the channel output port to judge whether the sampling voltage meets the requirement,
the power management module is also connected with the micro control unit to supply power to the micro control unit.
Further, the relay driving circuit further includes a sampling power supply, and the voltage sampling circuit further includes:
the field effect transistor switch is connected with the sampling power supply, and the field effect transistor switch is turned on/off according to an externally input control signal, so that the sampling power supply turns on/off the power supply of the relay driving circuit.
Further, the sampling resistor includes:
the first sampling resistor, the second sampling resistor and the relay driving circuit are sequentially connected in series;
and the first end of the third resistor is connected with the ground wire, and the second end of the third resistor is connected with the first sampling resistor and the second sampling resistor.
Further, the voltage sampling circuit further includes:
and the first end of the filter capacitor is connected with the ground wire, and the second end of the filter capacitor is connected with one end of the relay driving circuit, which is close to the multiplexer.
Further, the power management module includes:
the power management chip comprises a voltage input end and a voltage output end, and is used for adjusting the external voltage input into the voltage input end so that the external voltage becomes a preset voltage and outputting the preset voltage through the voltage output end.
Further, the power management module further includes:
and the first end of the grounding capacitor is connected with the voltage output end, and the second end of the grounding capacitor is connected with the ground wire.
Further, the multiplexer includes a multiplexing chip through which the plurality of voltage sampling circuits and the power management module are connected.
Further, the multiplexing chip includes eight channel input ports and one channel output. Due to the technical scheme, the utility model has the following beneficial effects:
according to the test circuit for the relay driving circuit, the plurality of voltage sampling circuits detect the operation condition of the relay driving circuit by detecting the sampling voltage of the sampling resistor, the power management module provides the power required by the operation of the multiplexer, the plurality of voltage sampling circuits butt-joint the detected sampling voltage with the plurality of channel input ports of the multiplexer, the multiplexer outputs the sampling voltage which is output by the plurality of sampling circuits one by one through the plurality of channel output ports, namely, one sampling voltage receiving end can butt-joint the plurality of voltage sampling circuits through the multiplexer, the input and output channels (analog IO port resources) can be effectively saved, the cost is reduced, the real-time monitoring and the accurate monitoring of the relay driving circuit are efficiently realized.
Drawings
In order to more clearly illustrate the technical solution of the present utility model, the following description will make a brief introduction to the drawings used in the description of the embodiments or the prior art. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a verification circuit for a relay drive circuit according to one embodiment of the utility model;
FIG. 2 is a schematic diagram of a voltage sampling circuit according to one embodiment of the utility model;
FIG. 3 is a schematic diagram of a power management module according to one embodiment of the utility model;
fig. 4 is a schematic diagram of a multiplexer according to one embodiment of the utility model.
100. A voltage sampling circuit; 101. sampling a power supply; 102. a field effect transistor switch; 103 a relay driving circuit; r1, a first sampling resistor; r2, a second sampling resistor; r3, a third sampling resistor; c1, a filter capacitor; 200. a multiplexer; 201. a power management chip; CH1, a first grounding capacitor; CH2, a second grounding capacitor; 300. a power management module; 301. multiplexing the chips; 302. a main control unit; 303. and a micro control unit.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, 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 making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
Next, a test circuit for the relay driving circuit 103 according to an embodiment of the present utility model is described.
As shown in fig. 1 to 4, the inspection circuit for the relay driving circuit 103 according to the embodiment of the present utility model includes a plurality of voltage sampling circuits 100, a multiplexer 200, and a power management module 300.
First, the voltage sampling circuit 100 is explained. Each of the voltage sampling circuits 100 includes a sampling resistor electrically connected to the relay driving circuit 103 and a voltage detection module for detecting a voltage of the sampling resistor and outputting the sampled voltage. The voltage detection module may include a device capable of detecting a voltage, such as a multimeter, and a circuit capable of outputting a detected sampling voltage.
As shown in fig. 2, the sampling resistor includes a first sampling resistor R1, a second sampling resistor R2, and a third sampling resistor R3. The sampling resistor is connected (in series or in parallel) to the relay driving circuit 103, and the sampling resistor can generate a sampling voltage (the current of the relay driving circuit 103 multiplied by the resistance value of the sampling resistor is equal to the sampling voltage), and the voltage detection module detects the sampling voltage, so that the operation state of the relay driving circuit 103 can be judged based on the voltage of the sampling resistor, and the sampling voltage is output.
Next, the multiplexer 200 is explained. The multiplexer 200 includes a plurality of channel input ports connected to the plurality of voltage sampling circuits 100 and a channel output port for outputting the sampling voltage of one of the plurality of voltage samples.
As shown in fig. 4, the multiplexer 200 includes eight channel input ports (Y0/Y1/Y2/Y3/Y4/Y5/Y6/Y7) that can interface with the output ports (HS 0/HS1/HS2/HS3/HS4/HS5/HS6/HS 7) of the eight voltage sampling circuits 100 at most, and one channel output port. The channel output port outputs the sampling voltage of one of the plurality of voltage samples one by one, for example, outputs the sampling voltage of eight voltage sampling circuits 100 one by one.
It should be noted that the above is only an optional example, and the input ports of the multiplexer 200 may further include four or ten input ports, that is, the number of input ports of the multiplexer 200 is not limited herein.
Alternatively, the multiplexer 200 may implement the above-described functions through the multiplexing chip 301.
Finally, the power management module 300 is described. The power management module 300 is configured to provide power to the multiplexer 200.
The power pipeline module provides power to the plurality of multiplexers so that the multiplexer 200 can operate.
According to the inspection circuit for the relay driving circuit 103, the plurality of voltage sampling circuits 100 detect the operation condition of the relay driving circuit 103 by detecting the sampling voltage of the sampling resistor, the power management module provides the power required by the operation of the multiplexer 200, the plurality of voltage sampling circuits 100 butt joint the detected sampling voltage with the plurality of channel input ports of the multiplexer 200, the multiplexer 200 outputs the sampling voltage which is output by the plurality of sampling circuits one by one through the plurality of channel output ports, namely, an external sampling voltage receiver can butt joint the plurality of voltage sampling circuits 100 through the multiplexer 200, an input and output channel (analog IO port resource) can be effectively saved, the cost is reduced, and the real-time monitoring and the accurate monitoring of the relay driving circuit 103 are efficiently realized.
In some embodiments of the present utility model, multiplexer 200 also includes a master control unit 302. The main control unit 302 is connected to the control ports of the multiplexer 200 to select one of the plurality of channel input ports one by one to interface with the channel output port. The power management module 300 is also connected to the main control unit 302 to power the main control unit 302.
As shown IN fig. 4, for example, the multiplexer 200 interfaces three voltage sampling circuits 100, the output terminals (HS 0/HS1/HS 2) of the three voltage sampling circuits 100 interface with three channel input ports (Y0/Y1/Y2), the main control unit 302 controls the three channel input ports (Y0/Y1/Y2) to interface with the channel output ports (OUT/IN) one by one, YO interfaces with OUT/IN 10 seconds later, Y1 interfaces with OUT/IN 10 seconds later, Y2 interfaces with OUT/IN 10 seconds later, YO interfaces with OUT/IN … …, thereby realizing the reciprocating cycle monitoring of the operation condition of the relay driving circuit 103.
Further, the multiplexer 200 further comprises a micro control unit 303. The micro control unit 303 is connected to the channel output port to determine whether the sampled voltage meets the requirement. The power management module 300 is further connected to the micro control unit 303 to supply power to the micro control unit 303.
The micro control unit 303 can judge whether the sampled voltages meet the requirements one by one and directly, so that the efficiency can be improved, and the result of the judgment can be stored correspondingly, and an alarm can be given when the sampled voltages are judged to not meet the requirements.
In some embodiments of the present utility model, the relay driving circuit 103 further includes a sampling power supply 101, and the power supply is provided to the relay driving circuit 103 and the voltage sampling circuit 100 through the sampling power supply, the voltage sampling circuit 100 further includes a field effect transistor switch 102 (MOS switch), the field effect transistor switch 102 is connected to the sampling power supply 101, and the field effect transistor switch 102 is turned on/off according to a control signal input from the outside, so that the sampling power supply 101 turns on/off the power supply of the relay driving circuit 103.
As shown in fig. 2, the power supply of the relay driving circuit 103 can be rapidly turned on/off according to an external control signal through the fet switch 102, so that the response time is short and the power consumption is low. The sampling power supply 101 also supplies power to the voltage sampling circuit 100, so that the start-up of the voltage sampling circuit 100 can be made to respond quickly.
Further, the sampling resistor includes a first sampling resistor R1, a second sampling resistor R2, and a third sampling resistor R3. The first sampling resistor R1, the second sampling resistor R2, and the relay driving circuit 103 are sequentially connected in series. The first end of the third resistor is connected with the ground wire, and the second end of the third resistor is connected with the first sampling resistor R1 and the second sampling resistor R2.
As shown in fig. 2, the operation of the short-term driving circuit may be monitored by detecting the sampled voltages of one or more of the first sampling resistor R1, the second sampling resistor R2, and the third sampling resistor R3.
Further, the voltage sampling circuit 100 further includes a filter capacitor C1, where a first end of the filter capacitor C1 is connected to the ground, and a second end of the filter capacitor C1 is connected to an end of the relay driving circuit 103 close to the multiplexer 200.
The output of the voltage sampling circuit 100 can be made more stable by the filter capacitor C1, and fluctuation can be reduced.
In some embodiments of the present utility model, the power management module 300 includes a power management chip 201, and the power management chip 201 includes a voltage input terminal and a voltage output terminal to adjust an external voltage input to the voltage input terminal so that the external voltage becomes a predetermined voltage and outputs the predetermined voltage through the voltage output terminal.
As shown in fig. 3, the external voltage can be adjusted to a predetermined voltage satisfying the demand by the power management chip 201, and the stability of the voltage output can be improved.
Further, the power management module 300 further includes a grounding capacitor, where a first end of the grounding capacitor is connected to the voltage output terminal, and a second end of the grounding capacitor is connected to a ground line.
As shown in fig. 4, the voltage output terminal of the power management chip 201 is connected through two grounding capacitors (a first grounding capacitor CH1 and a second grounding capacitor CH 2), and the output voltage of the power pipeline module can be reduced in fluctuation and interference through the grounding capacitors, and the smoothness of the voltage output line is improved.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (10)
1. A test circuit for a relay drive circuit, the test circuit comprising:
each voltage sampling circuit comprises a sampling resistor and a voltage detection module, the sampling resistor is electrically connected with the relay driving circuit, and the voltage detection module is used for detecting the voltage of the sampling resistor and outputting sampling voltage;
a multiplexer including a plurality of channel input ports connected to the plurality of voltage sampling circuits and a channel output port for outputting the sampling voltage of one of the plurality of voltage sampling circuits one by one;
and the power management module is used for providing electric energy for the multiplexer.
2. The inspection circuit for a relay driving circuit according to claim 1, further comprising:
a main control unit connected to the control ports of the multiplexer to select one of the plurality of channel input ports to interface with the channel output port one by one;
the power management module is also connected with the main control unit to supply power to the main control unit.
3. The inspection circuit for a relay driving circuit according to claim 1, wherein the multiplexer further comprises:
the micro control unit is connected with the channel output port to judge whether the sampling voltage meets the requirement,
the power management module is also connected with the micro control unit to supply power to the micro control unit.
4. The inspection circuit for a relay driving circuit according to claim 1, wherein the relay driving circuit further comprises a sampling power source, the voltage sampling circuit further comprising:
the field effect transistor switch is connected with the sampling power supply, and the field effect transistor switch is turned on/off according to an externally input control signal, so that the sampling power supply turns on/off the power supply of the relay driving circuit.
5. The inspection circuit for a relay driving circuit according to claim 4, wherein the sampling resistor comprises:
the first sampling resistor, the second sampling resistor and the relay driving circuit are sequentially connected in series;
and the first end of the third resistor is connected with the ground wire, and the second end of the third resistor is connected with the first sampling resistor and the second sampling resistor.
6. The inspection circuit for a relay driving circuit according to claim 5, wherein the voltage sampling circuit further comprises:
and the first end of the filter capacitor is connected with the ground wire, and the second end of the filter capacitor is connected with one end of the relay driving circuit, which is close to the multiplexer.
7. The verification circuit for a relay driver circuit of claim 1 wherein the power management module comprises:
the power management chip comprises a voltage input end and a voltage output end, and is used for adjusting the external voltage input into the voltage input end so that the external voltage becomes a preset voltage and outputting the preset voltage through the voltage output end.
8. The verification circuit for a relay driver circuit of claim 7 wherein the power management module further comprises:
and the first end of the grounding capacitor is connected with the voltage output end, and the second end of the grounding capacitor is connected with the ground wire.
9. The inspection circuit for a relay driving circuit according to claim 1, wherein the multiplexer includes a multiplexing chip through which the plurality of voltage sampling circuits and the power management module are connected.
10. The verification circuit for a relay driver circuit of claim 9 wherein the multiplexing chip comprises eight channel input ports and one channel output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321832314.9U CN220490990U (en) | 2023-07-12 | 2023-07-12 | Test circuit for relay driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321832314.9U CN220490990U (en) | 2023-07-12 | 2023-07-12 | Test circuit for relay driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220490990U true CN220490990U (en) | 2024-02-13 |
Family
ID=89837177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321832314.9U Active CN220490990U (en) | 2023-07-12 | 2023-07-12 | Test circuit for relay driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220490990U (en) |
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2023
- 2023-07-12 CN CN202321832314.9U patent/CN220490990U/en active Active
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