CN220064207U - Monitoring circuit, system and vehicle - Google Patents
Monitoring circuit, system and vehicle Download PDFInfo
- Publication number
- CN220064207U CN220064207U CN202321373388.0U CN202321373388U CN220064207U CN 220064207 U CN220064207 U CN 220064207U CN 202321373388 U CN202321373388 U CN 202321373388U CN 220064207 U CN220064207 U CN 220064207U
- Authority
- CN
- China
- Prior art keywords
- power supply
- resistor
- monitored
- triode
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 83
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000002441 reversible effect Effects 0.000 claims description 6
- 239000002131 composite material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Abstract
The present disclosure relates to a monitoring circuit, system and vehicle. The monitoring circuit comprises a power supply circuit, a threshold level detection circuit, a level change-over switch and a controller; the threshold level detection circuit comprises a voltage stabilizing diode; the input end of the power supply circuit is connected with a general input/output pin of the controller, and the output end of the power supply circuit is respectively connected with equipment to be monitored and the cathode of the voltage stabilizing diode; the voltage stabilizing diode is used for connecting equipment to be monitored, and the anode is connected with the input end of the level change switch; the output end of the level change-over switch is connected with the interrupt pin of the controller; and the controller is used for controlling the on-off of the power supply circuit by controlling the level of the general input/output pin so as to realize the state monitoring of the equipment to be monitored. The anti-interference performance and the suitability of the monitoring circuit are improved through the voltage stabilizing diode in the threshold level detection circuit. In addition, the voltage stabilizing diode is used as a threshold level detection circuit, so that the structure is simplified, and the cost is low.
Description
Technical Field
The present disclosure relates to the field of vehicle equipment monitoring, and in particular, to a monitoring circuit, system and vehicle.
Background
The vehicle is provided with various devices such as an airbag, and the working state of the devices needs to be monitored according to signals output by an electronic control unit (Electronic Control Unit, ECU) of the devices so as to ensure the normal operation of the vehicle.
However, in practical application, when the level of the vehicle is fluctuated or abnormal, the low level of the signal is offset, but the identification range of the signal by the monitoring circuit matched with the equipment to be monitored on the vehicle in the prior art is limited, so that the effective signal is difficult to accurately identify when the low level of the signal is offset, and the adaptability is poor.
Disclosure of Invention
The purpose of the present disclosure is to provide a monitoring circuit, a system and a vehicle, and aims to solve the technical problem that the suitability of the existing monitoring circuit is poor.
To achieve the above object, the present disclosure provides a monitoring circuit including:
the power supply circuit, the threshold level detection circuit, the level change-over switch and the controller;
wherein the threshold level detection circuit comprises a zener diode;
the input end of the power supply circuit is connected with a general input/output pin of the controller, and the output end of the power supply circuit is respectively connected with equipment to be monitored and the cathode of the voltage stabilizing diode;
the voltage stabilizing diode has a negative electrode for being connected with the equipment to be monitored and a positive electrode connected with the input end of the level change switch;
the output end of the level change switch is connected with the interrupt pin of the controller;
and the controller is used for controlling the on-off of the power supply circuit by controlling the level of the general input/output pin so as to realize the state monitoring of the equipment to be monitored.
Optionally, the power supply circuit includes a first triode and a second triode;
the base electrode of the first triode is connected with the general input/output pin, the collector electrode of the first triode is connected with the base electrode of the second triode, and the emitter electrode of the first triode is grounded;
and the emitter of the second triode is used for being connected with a power supply, and the collector of the second triode is used for being respectively connected with equipment to be monitored and the cathode of the zener diode.
Optionally, the power supply circuit further comprises a diode and a first resistor;
the positive electrode of the diode is connected with the collector electrode of the second triode, and the negative electrode of the diode is connected with one end of the first resistor;
and the other end of the first resistor is used for being connected with the equipment to be monitored.
Optionally, the power supply circuit further includes: the power supply filter capacitor, the second resistor and the third resistor;
one end of the power supply filter capacitor is used for being connected with the power supply, and the other end of the power supply filter capacitor is grounded;
one end of the second resistor is connected with the collector electrode of the first triode, and the other end of the second resistor is respectively connected with the base electrode of the second triode and one end of the third resistor;
and the other end of the third resistor is connected with the power supply.
Optionally, the threshold level detection circuit further includes:
and one end of the fourth resistor is used for being connected with the equipment to be monitored, and the other end of the fourth resistor is connected with the cathode of the zener diode.
Optionally, the monitoring circuit further comprises an electrostatic protection device arranged between the device to be monitored and the interrupt pin.
Optionally, the monitoring circuit further comprises a reverse protection device arranged between the zener diode and the level shifter switch.
Optionally, the monitoring circuit further comprises a fifth resistor disposed between the level shifter switch and the interrupt pin.
In addition, to achieve the above object, the present disclosure further provides a monitoring system, including:
the equipment to be monitored; and
and the monitoring circuit is the monitoring circuit.
In addition, in order to achieve the above purpose, the present disclosure further provides a vehicle, including the above monitoring system, wherein the device to be monitored in the monitoring system is an airbag.
In the above technical solution, the monitoring circuit includes a power supply circuit, a threshold level detection circuit, a level switch, and a controller, where the threshold level detection circuit includes a zener diode; the controller controls the on-off of the power supply circuit by controlling the level of the universal input/output pin of the controller so as to realize the state monitoring of the equipment to be monitored. Through the zener diode control voltage in the threshold level detection circuit, signal interference with a certain amplitude can be filtered, the low-level amplitude lifting phenomenon caused by the ground offset of the vehicle is reduced, the anti-interference performance of the monitoring circuit is improved, meanwhile, the normal operation of the monitoring circuit can be ensured under the condition that different threshold level values exist in different vehicle types, and the suitability of the monitoring circuit is improved. In addition, the voltage stabilizing diode is used as a threshold level detection circuit, so that the structure is simplified, and the cost is low.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
fig. 1 is a schematic diagram illustrating a configuration of a monitoring system according to an exemplary embodiment.
Fig. 2 is a schematic diagram illustrating a configuration of a monitoring system according to an exemplary embodiment.
Fig. 3 is a schematic view showing a state signal (normal state is continuous with occurrence of collision) output from an airbag according to an exemplary embodiment.
Fig. 4 is a schematic diagram showing a state signal (normal state) of an airbag output according to an exemplary embodiment.
Fig. 5 is a schematic diagram showing a state signal (collision) of an airbag output according to an exemplary embodiment.
Description of the reference numerals
1. First triode of power supply circuit Q1
Q2 second triode D1 diode
R1 first resistor C1 power supply filter capacitor
R2 second resistor R3 third resistor
2. Threshold level detection circuit D3 voltage-stabilizing diode
R4 fourth resistor 3-level change-over switch
Q3 composite triode R5 fifth resistor
R6 load resistor 4 electrostatic protection device
Reverse protection device of VS1 anti-static diode 5
D2 GPIO general input/output pin of composite diode
INT interrupt pin 100 device to be monitored
ECU electronic control unit 200 monitoring circuit
BATT power supply L controller
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
The present disclosure provides a monitoring circuit, as shown in fig. 1, a monitoring circuit 200 includes a power supply circuit 1, a threshold level detection circuit 2, a level shift switch 3, and a controller L; wherein the threshold level detection circuit 2 includes a zener diode D3; the input end of the power supply circuit 1 is connected with a general purpose input/output pin GPIO of the controller L, the output end of the power supply circuit 1 is respectively connected with the device to be monitored 100 and the cathode of the zener diode D3, specifically, as shown in fig. 2, the input end of the power supply circuit 1 is connected with the general purpose input/output pin GPIO of the controller L through an srs_en pin (i.e., an enable pin) of the monitoring circuit 200; the negative electrode of the voltage stabilizing diode D3 is used for being connected with the equipment to be monitored 100, and the positive electrode of the voltage stabilizing diode D3 is connected with the input end of the level change switch 3; the output end of the level switch 3 is connected to the interrupt pin INT of the controller L, specifically, as shown in fig. 2, the output end of the level switch 3 is connected to the interrupt pin INT of the controller L through the srs_out pin of the monitoring circuit 200; the controller L is configured to control on/off of the power supply circuit 1 by controlling the level of the general purpose input/output pin GPIO, so as to monitor the state of the device to be monitored 100.
In the present disclosure, the controller L may be a micro control unit (Microcontroller Unit, MCU) including a general purpose input/output pin GPIO and an interrupt pin INT, where the MCU may be a separately provided micro control unit, or may be a micro control unit with matched computing power in a multiplexed vehicle. The device to be monitored 100 may be an airbag, or may be a device similar to an output signal of the airbag, an electronic control unit (Electronic Control Unit, ECU) is disposed IN the device to be monitored 100, and the device to be monitored 100 is connected to the monitoring circuit 200 through an OUT interface of the ECU, specifically, as shown IN fig. 2, the device to be monitored 100 is connected to an srs_in pin of the monitoring circuit 200 through an OUT interface of the ECU.
In addition, the monitoring circuit 200 may monitor the state of the device 100 to be monitored at a preset period. Specifically, when the state of the device to be monitored 100 needs to be monitored, the controller L controls the general purpose input/output pin GPIO to output a high level, so that the srs_en pin is at a high level, and at this time, the power supply circuit 1 is turned on to monitor the state of the device to be monitored 100; when the state monitoring of the device to be monitored 100 is completed, the controller L controls the general purpose input/output pin GPIO to output a low level so that the srs_en pin is at a low level, and at this time, the power supply circuit 1 is turned off to stop monitoring the state of the device to be monitored 100. Therefore, the level of the general purpose input/output pin GPIO can be flexibly set according to the detection requirement, the power supply circuit is disconnected in time after the monitoring is finished, the long-term working current consumption of the monitoring circuit can be avoided, and the power consumption of the monitoring circuit is reduced.
When the general purpose input/output pin GPIO outputs a high level, the power supply circuit 1 is turned on, thereby supplying power to the monitoring circuit 200 and the electronic control unit ECU of the device 100 to be monitored. The level shift switch 3 is capable of converting a high voltage to a voltage required for the operation of the controller L, for example, a voltage greater than 6V to 3.3V. The threshold level detection circuit 2 includes a zener diode D3, and the zener diode D3 is turned on when the input voltage is greater than the zener voltage value of the zener diode D3, and the zener diode D3 is turned off when the input voltage is less than or equal to the zener voltage value of the zener diode D3. The voltage stabilizing diode D3 is used for threshold level threshold monitoring, so that signal interference with a certain amplitude can be filtered, the low-level amplitude lifting phenomenon caused by vehicle grounding deviation is reduced, the anti-interference performance of the monitoring circuit 200 is improved, and meanwhile, under the condition that different threshold level values exist in different vehicle types, the normal operation of the monitoring circuit 200 can be ensured, and the suitability of the monitoring circuit 200 is improved.
In the above technical solution, the monitoring circuit includes a power supply circuit, a threshold level detection circuit, a level switch, and a controller, where the threshold level detection circuit includes a zener diode; the controller controls the on-off of the power supply circuit by controlling the level of the universal input/output pin of the controller so as to realize the state monitoring of the equipment to be monitored. Through the zener diode control voltage in the threshold level detection circuit, signal interference with a certain amplitude can be filtered, the low-level amplitude lifting phenomenon caused by the ground offset of the vehicle is reduced, the anti-interference performance of the monitoring circuit is improved, meanwhile, the normal operation of the monitoring circuit can be ensured under the condition that different threshold level values exist in different vehicle types, and the suitability of the monitoring circuit is improved. In addition, the voltage stabilizing diode is used as a threshold level detection circuit, so that the structure is simplified, and the cost is low.
When the power supply circuit 1 is turned on, power is supplied to the monitoring circuit 200 and the ECU of the device to be monitored 100, at this time, the ECU outputs a status signal (for example, square wave) of the device to be monitored 100, and the status signal is input to the srs_in pin of the monitoring circuit 200 through the OUT interface, and then sequentially passes through the threshold level detection circuit 2, the level switch 3 and the srs_out pin, and is output to the interrupt pin INT of the controller L, where the frequency and the phase of the status signal before and after transmission remain unchanged. The controller L determines the working state of the equipment to be monitored according to the frequency of the square wave received in the self-timing calculation window detection time T1.
Taking an airbag as an example, an ECU of the airbag outputs a state signal in the form of a square wave, and determines the working state of the airbag according to the square wave frequency received by the controller L in T1. The operation state of the airbag includes a normal state (i.e., no collision occurs) and a collision occurs. The specific judging method comprises the following steps:
1. when the square wave frequency received by the controller L (specifically, the interrupt pin INT of the controller L) in T1 is a first preset frequency (a square wave with a frequency of 10Hz as shown in fig. 3 and 4), determining that the working state of the air bag is a normal state;
2. when the square wave frequency received by the controller L (specifically, the interrupt pin INT of the controller L) in T1 is a second preset frequency (such as a square wave with a frequency of 250Hz shown in fig. 3 and 5), the working state of the airbag is determined to be collision, where the second preset frequency is greater than the first preset frequency.
As an alternative embodiment, as shown in fig. 2, the power supply circuit 1 includes a first transistor Q1 and a second transistor Q2; the base electrode of the first triode Q1 is connected with the general input/output pin GPIO, the collector electrode of the first triode Q1 is connected with the base electrode of the second triode Q2, and the emitter electrode of the first triode Q is grounded; the emitter of the second triode Q2 is connected with the power supply BATT, and the collector of the second triode Q2 is connected with the equipment to be monitored 100 and the cathode of the zener diode D3 respectively.
In one embodiment of the present disclosure, the first transistor Q1 is an enable transistor, and the second transistor Q2 is a controlled transistor, also referred to as a power transistor, functioning as a power switch. When the state of the device to be monitored 100 needs to be monitored, the general purpose input/output pin GPIO is set to be at a high level (for example, +3.3v), the first triode Q1 is saturated and conducted to the ground, and the second triode Q2 is also saturated and conducted, at this time, the current is output to the second triode Q2 by the power supply BATT and is provided to the external ECU through the srs_in interface, so that the power supply circuit 1 can supply power to the external ECU IN a pull-up manner. After the monitoring is finished, the general purpose input/output pin GPIO is set to be at a low level (i.e. 0V), the base of the first triode Q1 is also at a low level, at this time, the first triode Q1 is disconnected, the collector thereof is at a high level, the base of the second triode Q2 is connected with the collector of the first triode Q1 and is also at a high level, and the emitter of the second triode Q2 is also at a high level, so that the second triode Q2 is also disconnected, and the power supply circuit 1 stops supplying power. Through setting up first triode Q1 and second triode Q2 for power supply circuit 1 can carry out power supply or outage with the beginning or the ending synchronization of monitoring work, prevents that whole circuit from switching on for a long time and consuming the electric current, can reduce the system consumption.
As an alternative embodiment, as shown in fig. 2, the power supply circuit 1 further includes a diode D1 and a first resistor R1; the positive electrode of the diode D1 is connected with the collector electrode of the second triode Q2, and the negative electrode of the diode D1 is connected with one end of the first resistor R1; the other end of the first resistor R1 is connected to the device to be monitored 100.
In one embodiment of the present disclosure, the power supply circuit 1 further includes a power supply pull-up portion, which is composed of a diode D1 and a first resistor R1, wherein the diode D1 is a reverse connection preventing protection diode, and the first resistor R1 is a pull-up matching resistor. The power supply BATT is output to the ECU through the diode D1 and the first resistor R1 so as to externally pull up and supply power to the ECU.
As an alternative embodiment, as shown in fig. 2, the power supply circuit 1 further includes: a power supply filter capacitor C1, a second resistor R2 and a third resistor R3; one end of the power supply filter capacitor C1 is connected with the power supply BATT, and the other end of the power supply filter capacitor C is grounded; one end of the second resistor R2 is connected with the collector electrode of the first triode Q1, and the other end of the second resistor R2 is respectively connected with the base electrode of the second triode Q2 and one end of the third resistor R3; and the other end of the third resistor R3 is connected with the power supply BATT.
The power supply filter capacitor C1 can perform filter processing on the power supply BATT, and reduces the amplitude of power supply ripple, so that the normal operation of the power supply circuit 1 is ensured. The second resistor R2 is a serial resistor, and can play a role in limiting current for the collector of the first triode Q1. The third resistor R3 is a base-level pull-up resistor, and can play a role in stabilizing the base level of the second triode Q2 when the second triode Q2 is in the off state.
As an alternative embodiment, as shown in fig. 2, the threshold level detection circuit 2 further includes: and one end of the fourth resistor R4 is used for being connected with the equipment to be monitored 100, and the other end of the fourth resistor R4 is connected with the cathode of the zener diode D3.
In one embodiment of the present disclosure, the fourth resistor R4 can adjust the voltage distribution in the threshold level detection circuit 2 to ensure the normal operation of the zener diode D3.
As an alternative embodiment, as shown in fig. 2, the monitoring circuit further comprises an electrostatic protection device 4 arranged between the device to be monitored 100 and the interrupt pin INT.
In one embodiment of the present disclosure, the electrostatic protection device 4 is composed of an anti-static diode VS1 (as shown in fig. 2) for protecting static electricity at the OUT interface of the device to be monitored 100, and when an instantaneous large current flows into the anti-static diode VS1, the large current is conducted to ground through the anti-static diode VS1, so as to prevent the large current from being rapidly propagated along the circuit within a short time to cause internal damage of the circuit.
As an alternative embodiment, as shown in fig. 2, the monitoring circuit further includes a reverse protection device 5 disposed between the zener diode D3 and the level shifter 3, so as to prevent the power supply from being connected reversely to the circuit.
In one embodiment of the present disclosure, the reverse protection device 5 is constituted by a composite diode D2 (as shown in fig. 2).
As an alternative embodiment, as shown in fig. 2, the monitoring circuit further includes a fifth resistor R5 disposed between the level shift switch 3 and the interrupt pin INT.
In one embodiment of the present disclosure, the fifth resistor R5 acts as a current limiter to avoid excessive current input to the MCU.
In a possible embodiment, as shown in fig. 2, the level switch 3 is formed by a composite triode Q3, and can convert a high voltage into a voltage required by the MCU to operate, for example, convert a voltage greater than 6V into 3.3V, so as to implement level conversion.
As shown in fig. 2, the monitoring circuit 200 further includes a load resistor R6, where one end of the load resistor R6 is connected to the fifth resistor R5, and the other end is grounded, so as to stabilize the voltage, and ensure that the monitoring circuit 200 works normally.
In addition, the present disclosure further provides a monitoring system, which includes the device to be monitored 100 and the monitoring circuit 200, where the monitoring circuit 200 is the monitoring circuit provided in the present disclosure. In addition, the present disclosure further provides a vehicle, which includes a monitoring system, where the monitoring system is the above-mentioned monitoring system provided by the present disclosure, and the device to be monitored 100 in the monitoring system is an airbag. The state of the safety airbag on the vehicle is monitored by the monitoring system.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (10)
1. A monitoring circuit, comprising:
a power supply circuit (1), a threshold level detection circuit (2), a level change-over switch (3) and a controller (L);
wherein the threshold level detection circuit (2) comprises a zener diode (D3);
the input end of the power supply circuit (1) is connected with a general purpose input/output pin (GPIO) of the controller (L), and the output end of the power supply circuit is respectively connected with equipment to be monitored (100) and the cathode of the voltage stabilizing diode (D3);
the voltage stabilizing diode (D3) is used for connecting the negative electrode with the equipment (100) to be monitored, and the positive electrode is connected with the input end of the level change switch (3);
the output end of the level change-over switch (3) is used for being connected with an interrupt pin (INT) of the controller (L);
the controller (L) is used for controlling the on-off of the power supply circuit (1) by controlling the level of the general purpose input/output pin (GPIO) so as to realize the state monitoring of the equipment (100) to be monitored.
2. The monitoring circuit according to claim 1, characterized in that the power supply circuit (1) comprises a first transistor (Q1) and a second transistor (Q2);
the base electrode of the first triode (Q1) is connected with the general purpose input/output pin (GPIO), the collector electrode of the first triode is connected with the base electrode of the second triode (Q2), and the emitter electrode of the first triode is grounded;
and the second triode (Q2) is characterized in that an emitter is connected with a power supply (BATT), and a collector is respectively connected with the equipment to be monitored (100) and the cathode of the voltage stabilizing diode (D3).
3. The monitoring circuit according to claim 2, characterized in that the power supply circuit (1) further comprises a diode (D1) and a first resistor (R1);
the positive electrode of the diode (D1) is connected with the collector electrode of the second triode (Q2), and the negative electrode of the diode is connected with one end of the first resistor (R1);
the first resistor (R1) is connected with the equipment (100) to be monitored at the other end.
4. The monitoring circuit according to claim 2, wherein the power supply circuit (1) further comprises: a power supply filter capacitor (C1), a second resistor (R2) and a third resistor (R3);
one end of the power supply filter capacitor (C1) is connected with the power supply (BATT), and the other end of the power supply filter capacitor is grounded;
one end of the second resistor (R2) is connected with the collector electrode of the first triode (Q1), and the other end of the second resistor is respectively connected with the base electrode of the second triode (Q2) and one end of the third resistor (R3);
the third resistor (R3) is connected with the power supply (BATT) at the other end.
5. The monitoring circuit according to claim 1, wherein the threshold level detection circuit (2) further comprises:
and one end of the fourth resistor (R4) is used for being connected with the equipment (100) to be monitored, and the other end of the fourth resistor is connected with the cathode of the zener diode (D3).
6. Monitoring circuit according to claim 1, characterized in that it further comprises electrostatic protection means (4) arranged between the device to be monitored (100) and the interrupt pin (INT).
7. The monitoring circuit according to claim 1, characterized in that it further comprises a reverse protection device (5) arranged between the zener diode (D3) and the level shifter switch (3).
8. The monitoring circuit according to claim 1, characterized in that it further comprises a fifth resistor (R5) arranged between the level-shift switch (3) and the interrupt pin (INT).
9. A monitoring system, comprising:
-a device (100) to be monitored; and
monitoring circuit (200), wherein the monitoring circuit (200) is according to any one of claims 1-8.
10. A vehicle comprising a monitoring system according to claim 9, wherein the device (100) to be monitored in the monitoring system is an airbag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321373388.0U CN220064207U (en) | 2023-05-31 | 2023-05-31 | Monitoring circuit, system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321373388.0U CN220064207U (en) | 2023-05-31 | 2023-05-31 | Monitoring circuit, system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220064207U true CN220064207U (en) | 2023-11-21 |
Family
ID=88786706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321373388.0U Active CN220064207U (en) | 2023-05-31 | 2023-05-31 | Monitoring circuit, system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220064207U (en) |
-
2023
- 2023-05-31 CN CN202321373388.0U patent/CN220064207U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108288735B (en) | Power source wake-up control circuit of electric automobile | |
| CN204145720U (en) | A kind of noise canceller circuit of audio devices | |
| CN113147504B (en) | Charging control circuit, charging system, vehicle and charging control method | |
| CN109532497B (en) | High-voltage interlocking control and detection circuit of electric automobile | |
| CN220064207U (en) | Monitoring circuit, system and vehicle | |
| CN212012500U (en) | Safe torque shutoff circuit | |
| CN211335606U (en) | Charging detection and wake-up circuit and battery management system | |
| CN113507199B (en) | High-reliability sleep circuit based on frequency control | |
| CN115207876A (en) | Overvoltage protection circuit, method and power supply system | |
| CN110854961B (en) | Power-on impact current suppression circuit | |
| CN210027305U (en) | Reversing signal detection circuit and vehicle-mounted electronic equipment | |
| CN209805667U (en) | drive circuit with power output port state detection function and low-end and/or high-end drive control circuit | |
| CN208078901U (en) | A kind of voltage monitoring circuit | |
| CN204392214U (en) | A kind of locked circuit | |
| CN212258391U (en) | Low-voltage power supply power-down protection circuit and low-voltage power supply power-down protection device | |
| CN220894434U (en) | High-voltage interlocking detection circuit | |
| CN215267712U (en) | Drive circuit for lithium battery control switch | |
| CN220122612U (en) | Voltage limiting protection circuit | |
| CN213484578U (en) | Power-down protection device | |
| CN218240721U (en) | Controller with local control and remote control functions | |
| CN215813163U (en) | Fault detection circuit, BMS system, power supply unit and trade electric cabinet of switch pipe | |
| CN220022625U (en) | Overvoltage protection circuit for input power supply of automobile parts | |
| CN112117736B (en) | Solid state power controller | |
| EP3985828B1 (en) | Battery turn on circuit and lithium battery | |
| CN215120095U (en) | Power supply circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |