CN114527409A - Load monitoring and diagnosing circuit for camera - Google Patents

Load monitoring and diagnosing circuit for camera Download PDF

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Publication number
CN114527409A
CN114527409A CN202210125485.1A CN202210125485A CN114527409A CN 114527409 A CN114527409 A CN 114527409A CN 202210125485 A CN202210125485 A CN 202210125485A CN 114527409 A CN114527409 A CN 114527409A
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China
Prior art keywords
load
power supply
camera device
monitoring
voltage
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Chinese (zh)
Inventor
李照龙
杜忠诚
卫冬冬
李军军
巩金朋
杨浩
陈绪年
谢东华
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Anhui Yuchi Intelligent Technology Co ltd
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Anhui Yuchi Intelligent Technology Co ltd
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Priority to CN202210125485.1A priority Critical patent/CN114527409A/en
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    • 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
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • 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
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The invention provides a load monitoring and diagnosing circuit for a camera, which comprises a VCC1 power supply, a camera device, a microcontroller, a VCC2 excitation source, a resistor R1, a resistor R2, a resistor R3 and a diode D1, wherein the VCC2 excitation source is connected with the camera device through a power supply; the VCC1 power supply is electrically connected with the anode of the power supply end of the camera device through a diode D1, and the cathode of the power supply section of the camera device is grounded; the power supply end of the camera device is connected with a resistor R2 and a resistor R3 in parallel and then is grounded, one end, far away from the ground, of the resistor R3 is connected with a first microcontroller in parallel for monitoring the voltage of the first microcontroller, and the grounding end of the first microcontroller is grounded; the VCC2 excitation source is electrically connected to the power supply terminal of the image pickup apparatus through a resistor R1. The voltage of the resistor R3 is enabled to show different values respectively in a load-to-ground short circuit fault state, a load-to-power fault state, a load open circuit fault state and a load normal state, so that real-time detection and monitoring are facilitated.

Description

Load monitoring and diagnosing circuit for camera
Technical Field
The invention relates to the field of monitoring and diagnosis, in particular to a load monitoring and diagnosis circuit for a camera.
Background
Along with the rapid development of automobile intellectualization, the application of the vehicle-mounted camera in the automobile field is gradually wide, the vehicle-mounted camera is gradually extended to the intelligent cabin interior behavior recognition and ADAS intelligent driving from the early stage of vehicle driving recording, backing images and 360-degree look-around, and the application scene is gradually enriched. According to the difference of intelligent driving function demand and camera mounted position, the vehicle-mounted camera is divided into foresight, back vision, look around, look sideways and built-in cameras and the like.
The vehicle-mounted camera is used as a main component of the intelligent driving area controller, and load diagnosis and detection of the vehicle-mounted camera are also very critical and important.
The diagnosis and detection of the current camera load are basically realized by collecting the power supply voltage of the camera through a microcontroller, and then various states of the camera load are judged according to the processing and analysis of the voltage collection value, including low short-circuit fault, power short-circuit fault and normal state, and because the voltage values collected by the camera load open circuit state and the normal connection state are the same, the microcontroller cannot detect and judge the load open circuit state.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a load monitoring and diagnosing circuit for a camera.
In order to solve the above technical problem, the technical solution adopted by the present invention is a load monitoring and diagnosing circuit for a camera, including:
the detection circuit is used for judging the fault type of the image pickup device by the image pickup device according to the voltage value detected by the detection circuit;
the VCC2 excitation source, VCC2 excitation source with camera device's supply terminal positive pole electricity is connected, VCC2 excitation source is used for giving when camera device opens the circuit detection circuit circular telegram to according to the voltage value that detection circuit detected judges camera device's real-time connection status.
Furthermore, the VCC2 driver source presets a rated voltage U2 and low power, and is used for enabling the VCC2 driver source to output a low current, the power supply VCC1 of the image pickup apparatus outputs a rated voltage U1, the value of the rated voltage U2 is greater than the rated voltage U1, when the image pickup apparatus is not open-circuited due to the output low current, the high-voltage VCC2 driver source is clamped, and the low-voltage VCC1 supplies power to the detection circuit; when the camera device is in an open circuit, the clamping is released, and the VCC2 excitation source supplies power to the detection circuit, so that the microcontroller detects the real-time connection state of the camera device;
and the detection circuit is provided with a backflow prevention unit to prevent the high voltage of the VCC2 excitation source from flowing back to a power supply VCC1 of the camera device.
Further, the backflow prevention unit is a diode D1, and a power supply VCC1 of the image pickup apparatus is connected to the positive electrode of the power supply port of the image pickup apparatus through the diode D1.
Furthermore, a shunt resistor R1 for shunting is arranged on the VCC2 excitation source, and the VCC2 excitation source is electrically connected with the anode of the power supply port of the image pickup device through the shunt resistor R1.
Further, detection circuitry includes divider resistance R2, monitoring resistance R3, first microcontroller, VCC1 power supply electricity is connected to camera device's power supply port is anodal, camera device's power supply port negative pole ground connection, ground connection behind camera device's the anodal parallelly connected divider resistance R2 of power supply port, the monitoring resistance R3, divider resistance R2 includes a sub-resistance at least, the parallelly connected first microcontroller of monitoring resistance R3's input is in order to be used for first microcontroller detects monitoring resistance R3's voltage value to judge camera device's trouble kind, first microcontroller's earthing terminal ground connection.
Furthermore, a plurality of threshold values are preset in the first microcontroller, and the plurality of threshold values are compared with the voltage value of the monitoring resistor R3 to judge the real-time connection state of the camera device, where the connection state includes a load-to-ground short-circuit fault, a load-to-power fault, a load open-circuit fault, and a load normal state.
Further, the plurality of thresholds include 0V, > (U1-U3), U2/(R1+ R2+ R3) × R3, (U1-U3)/(R2+ R3) × R3, where the connection state corresponding to 0V is a load-to-ground short-circuit fault state, the connection state corresponding to > (U1-U3) is a load-to-power fault state, the connection state corresponding to U2/(R1+ R2+ R3) × R3 is a load open-circuit fault state, and the connection state corresponding to U1-U3)/(R2+ R3) × R3 is a load normal state; u1 is the voltage value of rated voltage U1 of VCC1 power supply, U2 is the voltage value of rated voltage U2 of VCC2 excitation source, U3 is the voltage division value of diode D1, R1 is the resistance value of shunt resistor R1, R2 is the resistance value of voltage division resistor R2, and R3 is the resistance value of monitoring resistor R3.
Further, a display screen is arranged on the first microcontroller and used for displaying the voltage value of the monitoring resistor R3.
Further, still include remote monitoring device, remote monitoring device with first microcontroller electric connection is in order to be used for the control camera device's real-time connection state, the last alarm device that is provided with of remote monitoring device for report to the police when the load breaks down.
The power supply end of the camera device is connected with the second microcontroller in parallel to detect the voltage value of the power supply end, the grounding end of the second microcontroller is grounded, and the second microcontroller is provided with a display screen for displaying the voltage value of the power supply end of the camera device.
Compared with the prior art, the invention has the beneficial effects that: the voltage of the resistor R3 shows different values in the fault state of short circuit of load to ground, the fault state of power supply of load to open circuit and the fault state of normal load, so as to monitor the connection state of the camera device in real time.
Drawings
The disclosure of the present invention is illustrated with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:
FIG. 1 schematically illustrates a schematic diagram of the operation of a proposed circuit according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a system flow architecture according to an embodiment of the present invention;
fig. 3 schematically shows a flow structure diagram of remote monitoring according to an embodiment of the present invention.
Detailed Description
It is easily understood that according to the technical solution of the present invention, a person skilled in the art can propose various alternative structures and implementation ways without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.
An embodiment according to the present invention is shown in connection with fig. 1. A load monitoring diagnostic circuit for a camera comprising:
the VCC2 excitation source is electrically connected with the anode of the power supply end of the camera device, and the camera device judges the fault type of the camera device according to the voltage value detected by the detection circuit;
and the VCC2 excitation source is used for electrifying the detection circuit when the camera is opened, and judging the real-time connection state of the camera according to the voltage value detected by the detection circuit. As shown in the prior art and the detection circuit, the present invention is improved according to the prior art, and the VCC2 excitation source is used to energize the detection circuit when the load is open, so that the voltage value detected by the microcontroller for detection is different in the four states of the load-to-ground short circuit fault, the load-to-power fault, the load open circuit fault and the load normal state, thereby determining the real-time connection state of the camera device.
Specifically, as shown in fig. 1, the VCC2 driver source presets a rated voltage U2 and low power, which is used to enable the VCC2 driver source to output low current, the VCC1 power supply of the image pickup apparatus outputs a rated voltage U1, the value of the rated voltage U2 is greater than the rated voltage U1, when the image pickup apparatus is not open-circuited due to the output low current, the high-voltage VCC2 driver source is clamped, and the low-voltage VCC1 power supply supplies power to the detection circuit; when the camera device is in an open circuit, the clamping is released, and the VCC2 excitation source supplies power to the detection circuit, so that the microcontroller detects the real-time connection state of the camera device;
and the detection circuit is provided with a backflow prevention unit to prevent the high voltage of the VCC2 excitation source from flowing back to a VCC1 power supply of the camera device. The VCC2 excitation source of low current is when the non-open circuit of load camera device, by the clamp, make VCC1 power supply normally supply power for detection circuit, when the load camera device opens a way, the clamp is relieved, the high VCC2 excitation source of voltage supplies power for detection circuit this moment, through different powers under different states, the voltage value of very obvious detection circuit is inequality, thereby make the multiple connection status of camera device demonstrate different voltage values in detection circuit, be convenient for judge the discernment. The provision of the anti-backflow unit prevents the VCC2 driver source of high voltage from flowing voltage into the VCC1 power supply of low voltage.
Specifically, as shown in fig. 1, the backflow prevention unit is a diode D1, and a VCC1 power supply of the image pickup apparatus is connected to the positive electrode of the power supply port of the image pickup apparatus through the diode D1. The backflow prevention function is provided by the diode D1.
Specifically, as shown in fig. 1, a shunt resistor R1 for shunting is provided on the VCC2 excitation source, and the VCC2 excitation source is electrically connected to the positive electrode of the power supply port of the image pickup apparatus through the shunt resistor R1. A shunt resistor R1 is provided for shunting.
Specifically, as shown in fig. 1 and fig. 2, the detection circuit includes divider resistor R2, monitoring resistance R3, first microcontroller, VCC1 power supply electricity is connected to camera device's power supply port is anodal, camera device's power supply port negative pole ground connection, ground connection behind camera device's the anodal parallelly connected divider resistor R2 of power supply port, the monitoring resistance R3, divider resistor R2 includes a sub-resistor at least, the parallelly connected first microcontroller of monitoring resistance R3's input is in order to be used for first microcontroller detects monitoring resistance R3's voltage value to judge camera device's fault type, first microcontroller's earthing terminal ground connection. A specific implementation method is provided as follows: when the circuit load camera device is normal, the VCC2 excitation source makes the output current very small due to its preset low power and rated voltage U1, resulting in the voltage being clamped, so that the VCC1 power supply source smaller than its voltage value supplies power to the camera device, the diode D1 is set to prevent the high voltage of VCC2 excitation source from entering into VCC1 power supply source, at this time, the VCC1 power supply source divides the voltage to resistor R2 and resistor R3, the voltage of resistor R3 is detected by the first microcontroller, at this time, the voltage of R3 is (U1-U3)/(R2+ R3) × R3, wherein U3 is the voltage value divided by diode D1, when the circuit load camera device short-to-ground fails, the voltage of R3 is 0V, when the circuit load camera device load fails, the external power source may be directly connected to the load, resulting in the voltage of the load becomes larger, the voltage of R3 is larger than U1-U3, when the circuit load image pickup device has an open-circuit fault, the clamp is released, the VCC2 excitation source with large voltage supplies power to the circuit, and the diode D1 is arranged to prevent the VCC2 excitation source from flowing back to the VCC1 power supply. The voltage of R3 at this time was U2/(R1+ R2+ R3) × R3. The voltage of the resistor R3 is different in each state, so that it is very easy to distinguish and monitor the connection state of the image pickup apparatus.
Specifically, as shown in fig. 1, a plurality of threshold values are preset in the first microcontroller, and the plurality of threshold values are compared with the voltage value of the monitoring resistor R3 to determine the real-time connection state of the image capturing device, where the connection state includes a load-to-ground short-circuit fault, a load-to-power fault, a load open-circuit fault, and a load normal state. The specific connection state of the load imaging device is determined by determining the voltage value of the detection resistor R3 and the threshold value.
Specifically, as shown in fig. 1, the plurality of thresholds include 0V, > (U1-U3), U2/(R1+ R2+ R3) × R3, (U1-U3)/(R2+ R3) × R3, where the connection state corresponding to 0V is a load-to-ground short-circuit fault state, the connection state corresponding to > (U1-U3) is a load-to-power fault state, the connection state corresponding to U2/(R1+ R2+ R3) × R3 is a load open-circuit fault state, and the connection state corresponding to U1-U3)/(R2+ R3) × R3 is a load normal state; u1 is the voltage value of rated voltage U1 of VCC1 power supply, U2 is the voltage value of rated voltage U2 of VCC2 excitation source, U3 is the voltage division value of diode D1, R1 is the resistance value of shunt resistor R1, R2 is the resistance value of voltage division resistor R2, and R3 is the resistance value of monitoring resistor R3. Provides a specific implementation method.
Specifically, as shown in fig. 1, a display screen is disposed on the first microcontroller and is used for displaying the voltage value of the monitoring resistor R3. The voltage value of the monitoring resistor R3 is displayed, so that a person can visually judge the connection state of the load.
Specifically, as shown in fig. 1, the system further comprises a remote monitoring device, wherein the remote monitoring device is electrically connected with the first microcontroller to monitor the real-time connection state of the camera device, and an alarm device is arranged on the remote monitoring device and used for alarming when a load fails. The remote monitoring device can remotely monitor the real-time connection state of the camera device through signal transmission, and can directly display the specific connection state of the current camera device in an external display screen through signals. The terminal is visual and convenient, great convenience is brought to detection of personnel, and multiple data analysis of the terminal can be realized, so that the terminal can integrally monitor a plurality of camera devices.
Specifically, as shown in fig. 3, the device further includes a second microcontroller, a power supply terminal of the image pickup apparatus is connected in parallel to the second microcontroller for detecting the voltage at the power supply terminal, and a display screen is arranged on the second microcontroller for displaying the voltage value of the power supply terminal of the image pickup apparatus. The second microcontroller detects the voltage of the power supply terminal of the camera device, and the voltage at the power supply terminal can distinguish the four states.
Providing a specific implementation data:
let VCC2 driver voltage U2 be 12V, power supply VCC1 voltage U1 be 8V, R1 be 4.7K, R2 be 50K, R3 be 10K, diode drop be 0.7V.
Figure BDA0003500201680000051
In this embodiment, the circuit is successfully installed through the above-mentioned installation relationship of components and electrical appliances, then the first microcontroller is used to detect the voltage of the resistor R3, when the circuit load image pickup apparatus is normal, the VCC2 excitation source makes the output current very small due to its preset low power and rated voltage U1, so that the voltage is clamped, so that the VCC1 power supply source smaller than its voltage value supplies power to the image pickup apparatus, the diode D1 is provided to prevent the high voltage of the VCC2 excitation source from entering the VCC1 power supply source, at this time, the VCC1 power supply source divides the voltage onto the resistor R2 and the resistor R3, the first microcontroller detects the voltage of the resistor R3, at this time, the voltage of R3 is (U1-U3)/(R2+ R3) R3, where U3 is the voltage value of the diode D1, when the circuit load image pickup apparatus is short-to ground, at this time, the voltage of R3 is 0V, when the load of the circuit load camera device has a power failure, an external power supply is directly connected to the load, so that the voltage of the load is increased, the voltage of R3 is higher than (U1-U3), when the load of the circuit load camera device has an open-circuit failure, the clamping is released, the VCC2 excitation source with high voltage supplies power to the circuit, and the diode D1 is arranged to prevent the VCC2 excitation source from flowing back to the VCC1 power supply. The voltage of R3 at this time was U2/(R1+ R2+ R3) × R3. The voltage of the resistor R3 is different in each state, so that it is very easy to distinguish and monitor the connection state of the image pickup apparatus.
The connection state of the camera device can be monitored through the remote monitoring device, and when the connection state of the camera device is a fault state, the remote monitoring device enables the alarm device to give an alarm through signal transmission.
And the remote monitoring device can also compare or redundantly through the data of the first microcontroller and the second microcontroller, so that the detected connection state is more accurate.
The technical scope of the present invention is not limited to the above description, and those skilled in the art can make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and such changes and modifications should fall within the protective scope of the present invention.

Claims (10)

1. A load monitoring diagnostic circuit for a camera, comprising:
the detection circuit is used for judging the fault type of the image pickup device by the image pickup device according to the voltage value detected by the detection circuit;
the VCC2 excitation source, VCC2 excitation source with camera device's supply terminal positive pole electricity is connected, VCC2 excitation source is used for giving when camera device opens the circuit detection circuit circular telegram to according to the voltage value that detection circuit detected judges camera device's real-time connection status.
2. A load monitoring and diagnostic circuit for a camera head as claimed in claim 1, wherein: the VCC2 excitation source is preset with rated voltage U2 and low power, and is used for enabling the VCC2 excitation source to output low current, the VCC1 power supply of the image pickup device outputs rated voltage U1, the value of the rated voltage U2 is greater than the rated voltage U1, when the image pickup device is not open-circuited due to the output low current, the high-voltage VCC2 excitation source is clamped, and the low-voltage VCC1 power supply supplies power to the detection circuit; when the camera device is in an open circuit, the clamping is released, and the VCC2 excitation source supplies power to the detection circuit, so that the microcontroller detects the real-time connection state of the camera device;
and the detection circuit is provided with a backflow prevention unit to prevent the high voltage of the VCC2 excitation source from flowing back to a VCC1 power supply of the camera device.
3. A load monitoring and diagnostic circuit for a camera head according to claim 2, wherein: the backflow prevention unit is a diode D1, and a VCC1 power supply of the camera device is connected with the anode of a power supply port of the camera device through a diode D1.
4. A load monitoring and diagnostic circuit for a camera head according to claim 3, wherein: the VCC2 excitation source is provided with a shunt resistor R1 for shunting, and the VCC2 excitation source is connected with the anode of the power supply port of the camera device through the shunt resistor R1.
5. The load monitoring and diagnosis circuit for a camera according to claim 4, wherein: detection circuitry includes divider resistance R2, monitoring resistance R3, a microcontroller, VCC1 power supply electricity is connected extremely camera device's power supply port is anodal, camera device's power supply port negative pole ground connection, camera device's the anodal parallelly connected divider resistance R2 of power supply port, monitoring resistance R3 back ground connection, divider resistance R2 includes a sub-resistance at least, monitoring resistance R3's the parallelly connected first microcontroller of input is in order to be used for a microcontroller detects monitoring resistance R3's voltage value to judge camera device's trouble kind, first microcontroller's earthing terminal ground connection.
6. The load monitoring and diagnosis circuit for a camera according to claim 5, wherein: a plurality of threshold values are preset in the first microcontroller, and the threshold values are compared with the voltage value of the monitoring resistor R3 to judge the real-time connection state of the camera device, wherein the connection state comprises a load-to-ground short circuit fault, a load-to-power fault, a load open circuit fault and a load normal state.
7. The load monitoring and diagnosis circuit for a camera according to claim 6, wherein: the plurality of thresholds include 0V, > (U1-U3), U2/(R1+ R2+ R3) × R3, (U1-U3)/(R2+ R3) × R3, wherein the connection state corresponding to 0V is a load-to-ground short-circuit fault state, > (U1-U3) is a load-to-power fault state, and U2/(R1+ R2+ R3) × R3 is a load open-circuit fault state, (U1-U3)/(R2+ R3) × R3 is a load normal state; u1 is the voltage value of rated voltage U1 of VCC1 power supply, U2 is the voltage value of rated voltage U2 of VCC2 excitation source, U3 is the voltage division value of diode D1, R1 is the resistance value of shunt resistor R1, R2 is the resistance value of voltage division resistor R2, and R3 is the resistance value of monitoring resistor R3.
8. A load monitoring and diagnostic circuit for a camera head as claimed in claim 7, wherein: and a display screen is arranged on the first microcontroller and used for displaying the voltage value of the monitoring resistor R3.
9. The load monitoring and diagnosis circuit for a camera according to claim 5, wherein: still include remote monitoring device, remote monitoring device with first microcontroller electric connection is in order to be used for the control camera device's real-time connection state, the last alarm device that is provided with of remote monitoring device for report to the police when the load breaks down.
10. The load monitoring and diagnostic circuit for a camera according to claim 9, wherein: the power supply end of the camera device is connected with the second microcontroller in parallel so as to be used for detecting the voltage value of the position, the grounding end of the second microcontroller is grounded, and the second microcontroller is provided with a display screen for displaying the voltage value of the power supply end of the camera device.
CN202210125485.1A 2022-02-10 2022-02-10 Load monitoring and diagnosing circuit for camera Pending CN114527409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210125485.1A CN114527409A (en) 2022-02-10 2022-02-10 Load monitoring and diagnosing circuit for camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210125485.1A CN114527409A (en) 2022-02-10 2022-02-10 Load monitoring and diagnosing circuit for camera

Publications (1)

Publication Number Publication Date
CN114527409A true CN114527409A (en) 2022-05-24

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CN202210125485.1A Pending CN114527409A (en) 2022-02-10 2022-02-10 Load monitoring and diagnosing circuit for camera

Country Status (1)

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