Novel vehicle camera heating power supply system and circuit protection board

Abstract

The utility model provides a novel vehicle camera heating power supply system and a circuit protection board. A main control circuit, a protection circuit and a heating wire control circuit are additionally arranged in a host circuit and a camera circuit; the main control circuit is used for providing a power supply for the heating wire and detecting loop current, and is connected with the protection circuit; the protection circuit and the heating wire control circuit are used for controlling starting and stopping of a heating function of the camera, the protection circuit and the heating wire control circuit are connected through a coaxial line, and the heating wire control circuit directly supplies power to a camera heating wire; under the cooperation of the three modules, the camera heating power supply system provided by the utility model can realize a camera heating function more stably and safely, and meanwhile, the system is simple in circuit structure, low in cost and beneficial to mass production.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent vehicles, and in particular to a novel heating power supply system and a circuit protection board for a vehicle camera. Background Art

[0002] Nowadays, car cameras play an important role in the field of smart vehicle technology, including but not limited to: reversing assistance, panoramic monitoring, driving recorder and driver assistance system. In general, car cameras play an important role in smart vehicles, which can improve driving safety, provide driving assistance functions, and record important information during driving.

[0003] In frost and foggy weather conditions, frost or fog will form on the lens of the car camera, greatly affecting driving safety. However, the car camera is installed outside the car and the driver cannot deal with it in time, so a heating circuit is added to the camera.

[0004] In the existing heating circuits, the camera heating circuits commonly use two methods: direct power supply and increasing the current of the camera POC (Power over Coax) power supply network. Both methods are costly and unstable. Summary of the invention

[0005] In order to solve the above technical problems, the utility model provides a novel vehicle camera heating power supply system and circuit protection board, method and storage medium, and adds a main control circuit, a protection circuit and a heating wire control circuit in the host circuit and the camera circuit; the main control circuit is used to provide power for the heating wire and detect the loop current, and is connected to the protection circuit; the protection circuit and the heating wire control circuit are used to control the opening and closing of the camera heating function; with the coordinated cooperation of the three modules, the camera heating power supply system proposed in the utility model can realize the camera heating function more stably and safely.

[0006] In the first aspect, the utility model proposes a novel vehicle camera heating power supply system, including a POC power supply module, a deserializer and a Soc chip in a host circuit, and a POC power supply module, a serializer and a sensor in a camera circuit. A coaxial line is provided between the host circuit and the camera circuit for connection, and the Soc chip is connected to the POC power supply module.

[0007] A main control circuit and a protection circuit are added to the host circuit end.

[0008] A heating wire control circuit is added to the camera circuit end.

[0009] in,

[0010] The main control circuit is connected to the protection circuit, and the protection circuit is connected to the heating wire control circuit through the coaxial line.

[0011] The Soc chip is connected to the main control circuit and the protection circuit.

[0012] The heating wire control circuit is connected to the POC power taking module.

[0013] Furthermore, when the Soc chip controls the POC power supply module to cut off power, the main control circuit starts to supply power. When the current of the main control circuit reaches the current operating range of the heating wire, the protection circuit is turned on, and the current is supplied to the heating wire control circuit through the protection circuit. The heating wire control circuit is turned on, and the heating wire enters the working state.

[0014] Furthermore, when the Soc chip controls the POC power supply module to turn on, the heating wire control circuit is disconnected, the heating wire enters an idle state, and the main control circuit stops supplying power.

[0015] The heating wire power supply current detection module and the protection circuit work together to start the heating wire power supply and monitor the loop current:

[0016] If the loop current exceeds the set value, it is considered an external short circuit and needs to be shut down.

[0017] If the loop current is less than a certain set value, it is considered that the external circuit is open and a fault needs to be reported.

[0018] If the loop current is within the set range, it is considered to be working normally.

[0019] The heating wire control circuit is used on the camera end to control the start of the heating wire.

[0020] By using this design, it is possible to avoid supplying power to the heating wire through an external power supply line, thus ensuring the safety of the entire circuit.

[0021] Furthermore, the coaxial line is divided into a coaxial line host circuit part, a coaxial line camera circuit part and a middle part.

[0022] The protection circuit and the POC power supply module are connected to the coaxial line host circuit portion.

[0023] The heating wire control circuit and the POC power supply module are partially connected to the coaxial line camera circuit.

[0024] It should be noted that the two ends of the coaxial line are also connected to a serializer and a deserializer through capacitors.

[0025] With this design, the coaxial cable can be used for communication and power supply connection between the host circuit and the camera.

[0026] Furthermore, the main control circuit includes:

[0027] The power integrated management chip U1 includes an RG1 port, an RG2 port, a VCC port, a V5 port, an OUT port and a GND port.

[0028] Monitor resistor R8, resistor R9 and resistor R10.

[0029] Capacitor C10 and capacitor C11.

[0030] A first DC voltage source and a second DC voltage source.

[0031] in,

[0032] One end of the monitoring resistor R8 is connected to the first DC voltage source, and the other end is connected to the RG2 port.

[0033] The RG1 port and the VCC port are connected to a first DC voltage source.

[0034] One end of the capacitor C11 is connected to the RG1 port and the VCC port, and the other end is grounded.

[0035] The V5 port is connected to the second DC voltage source through the resistor R9.

[0036] One end of capacitor C10 is connected to the V5 port, and the other end is grounded.

[0037] The OUT port is connected to the analog-to-digital conversion port of the Soc chip through resistor R10.

[0038] The GND port is connected to ground.

[0039] The U1 chip will extract the voltage difference across the monitoring resistor R8, then amplify it and output it to the analog-to-digital conversion port of the Soc chip at the OUT port of U1. Through this circuit design, the loop current of the heating wire can be monitored.

[0040] Furthermore, the protection circuit includes:

[0041] Resistor R5 and resistor R6.

[0042] Transistor Q2 and transistor Q0001.

[0043] And, capacitor C009.

[0044] in,

[0045] A resistor R5 and a capacitor C0009 are connected in parallel between the emitter and the collector of the transistor Q2.

[0046] The collector of transistor Q2 is connected to the coaxial mainframe circuit part, and the base is connected to the collector of transistor Q0001 through resistor R6.

[0047] The base of transistor Q0001 is connected to the first control enable port of the Soc chip, and the emitter is grounded.

[0048] The Soc chip receives the amplified voltage difference across the monitoring resistor R8 input by the U1 chip, and determines whether the loop current of the loop heating wire is within the working range of the heating wire through the internal logic of the Soc. If so, a low level is sent to the base of the transistor Q0001, if not, a high level is sent to the base of the transistor Q0001. Through this circuit design, the safe use of the heating wire can be protected by the protection circuit.

[0049] Furthermore, the main control circuit is connected to the protection circuit, specifically:

[0050] The emitter of transistor Q2 is connected to monitoring resistor R8.

[0051] Furthermore, the heating wire control circuit includes:

[0052] Transistor Q3 and transistor Q0004.

[0053] Resistor R0012.

[0054] Capacitor C0008 and capacitor C0012.

[0055] and, a third DC voltage source.

[0056] in,

[0057] The emitter of transistor Q3 is connected to the coaxial camera circuit part, the collector of transistor Q3 is connected to the heating wire input end, the base of transistor Q3 is connected to the power supply module through transistor C0012 and resistor R11, and transistor C0012 is connected in parallel with resistor R11.

[0058] The collector of the transistor Q0004 is connected to the base of the transistor Q3, the emitter of the transistor Q0004 is connected to the control end of the serializer, and the base of the transistor Q0004 is connected to the third DC voltage source.

[0059] Furthermore, the camera heating wire power supply switch is connected to the power taking module, specifically:

[0060] The base of transistor Q3 is connected to the output terminal of the POC power supply.

[0061] The circuit application of the heating wire control circuit is a combination switch, which mainly realizes PTC power supply control. When the camera video stream is not working, the control end of the serializer is at a low level. At this time, the emitter of the transistor Q0004 receives the level signal of the control end of the serializer and executes conduction or cutoff. The base of the transistor Q3 receives the level signal of the collector of the transistor Q0004 and the output end of the POC power supply and executes conduction or cutoff. When the transistor Q3 is turned on, the output voltage is to the heating wire. When the transistor Q3 is cut off, the heating wire control circuit is disconnected, the heating wire cannot receive the voltage, and the heating wire is turned off.

[0062] In the second aspect, the utility model proposes a circuit protection board, including: a new type of vehicle camera heating and power supply system, the system is integrated on a circuit substrate; the battery protection board includes: the vehicle camera heating and power supply system, and the circuit substrate, the vehicle camera heating and power supply system is integrated on the circuit substrate.

[0063] To sum up, the utility model proposes a novel vehicle camera heating power supply system and circuit protection board, in which a main control circuit, a protection circuit and a heating wire control circuit are added to the host circuit and the camera circuit; the main control circuit is used to provide power to the heating wire and detect the loop current, and is connected to the protection circuit; the protection circuit and the heating wire control circuit are used to control the opening and closing of the camera heating function, the protection circuit and the heating wire control circuit are connected through a coaxial cable, and the heating wire control circuit directly supplies power to the camera heating wire.

[0064] Compared with the prior art, the present invention has at least the following beneficial effects:

[0065] Through the coordinated cooperation of the main control circuit, the protection circuit and the heating wire control circuit, the camera heating power supply system proposed in the utility model can realize the camera heating function more stably and safely. At the same time, the system has a simple circuit structure and low cost, which is conducive to large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 It is a schematic diagram of a novel vehicle camera heating and power supply system shown in an embodiment of the utility model.

[0067] Figure 2 It is a schematic diagram of a main control circuit shown in an embodiment of the utility model.

[0068] Figure 3 It is a schematic diagram of a protection circuit shown in an embodiment of the utility model.

[0069] Figure 4 It is a schematic diagram of a heating wire control circuit shown in an embodiment of the utility model. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0071] Embodiment 1:

[0072] See also Figure 1 , is a schematic diagram of a novel vehicle camera heating power supply system shown in an embodiment of the utility model, specifically:

[0073] A novel automotive camera heating power supply system includes a POC power supply module, a deserializer and a Soc chip in a host circuit, and a POC power supply module, a serializer and a sensor in a camera circuit. A coaxial line is provided between the host circuit and the camera circuit for connection, and the Soc chip is connected to the POC power supply module.

[0074] A main control circuit and a protection circuit are added to the host circuit end.

[0075] A heating wire control circuit is added to the camera circuit end.

[0076] in,

[0077] The main control circuit is connected to the protection circuit, and the protection circuit is connected to the heating wire control circuit through the coaxial line.

[0078] The Soc chip is connected to the main control circuit and the protection circuit.

[0079] The heating wire control circuit is connected to the POC power taking module.

[0080] In an embodiment of the present invention, optionally, when the Soc chip controls the POC power supply module to cut off power, the main control circuit starts to supply power, and when the current of the main control circuit reaches the current operating range of the heating wire, the protection circuit is turned on, and the current is supplied to the heating wire control circuit through the protection circuit. The heating wire control circuit is turned on, and the heating wire enters a working state.

[0081] In an embodiment of the present invention, optionally, when the Soc chip controls the POC power supply module to be turned on, the heating wire control circuit is disconnected, the heating wire enters an idle state, and the main control circuit stops supplying power.

[0082] In the embodiment of the present invention, optionally, the heating wire power supply current detection module and the protection circuit cooperate to execute the start of the heating wire power supply and the monitoring of the loop current:

[0083] If the loop current exceeds the set value, it is considered an external short circuit and needs to be shut down.

[0084] If the loop current is less than a certain set value, it is considered that the external circuit is open and a fault needs to be reported.

[0085] If the loop current is within the set range, it is considered to be working normally.

[0086] The heating wire control circuit is used on the camera end to control the start of the heating wire.

[0087] In an embodiment of the present invention, optionally, in the host circuit, the battery voltage supplies power to the main control circuit, the main control circuit starts working, amplifies the voltage and sends it to the Soc chip, the Soc chip converts it into a digital signal and determines through internal logic whether the voltage is within the operating voltage range of the heating wire, and generates a result level signal and sends it to the protection circuit. The protection circuit performs conduction or cutoff according to the result level signal. At the same time, the main control circuit also outputs voltage to the protection circuit. If the protection circuit is turned on, the voltage will continue to be output to the camera circuit through the coaxial cable. If the protection circuit is cut off, the entire heating wire circuit loop will be disconnected.

[0088] In an embodiment of the present invention, optionally, in the host circuit, the Soc chip is also connected to the POC power supply module to control the opening and closing of the POC power supply module.

[0089] In the embodiment of the present invention, optionally, the POC power supply module receives the voltage output by the POC power supply module through the coaxial cable, and supplies power to the entire camera circuit through the POC power supply output terminal.

[0090] In an embodiment of the present invention, optionally, in the camera circuit, the LOCK control port of the serializer is connected to the heating wire control circuit, and the heating wire control circuit is also connected to the POC power output terminal. At the same time, the heating wire control circuit receives the voltage output by the protection circuit through the coaxial cable. When the camera video stream is turned off, the LOCK control port of the serializer is at a low level, the heating wire control circuit is turned on, and continues to output voltage to the heating wire. When the camera video stream is turned on, the LOCK control port of the serializer is at a high level, the POC power output terminal is at a high level, the heating wire control circuit is cut off, and the entire heating wire circuit loop is disconnected.

[0091] See also Figure 2 , is a schematic diagram of a main control circuit shown in an embodiment of the utility model. In the embodiment of the utility model, optionally, the main control circuit specifically includes:

[0092] The power integrated management chip U1 includes an RG1 port, an RG2 port, a VCC port, a V5 port, an OUT port and a GND port.

[0093] Monitor resistor R8, resistor R9 and resistor R10.

[0094] Capacitor C10 and capacitor C11.

[0095] A first DC voltage source and a second DC voltage source.

[0096] in,

[0097] One end of the monitoring resistor R8 is connected to the first DC voltage source, and the other end is connected to the RG2 port.

[0098] The RG1 port and the VCC port are connected to a first DC voltage source.

[0099] One end of the capacitor C11 is connected to the RG1 port and the VCC port, and the other end is grounded.

[0100] The V5 port is connected to the second DC voltage source through the resistor R9.

[0101] One end of capacitor C10 is connected to the V5 port, and the other end is grounded.

[0102] The OUT port is connected to the analog-to-digital conversion port of the Soc chip through resistor R10.

[0103] The GND port is connected to ground.

[0104] In the embodiment of the utility model, the chip U1 is MPQ8113GJ-AEC1-Z, which is a power management chip mainly used in battery-powered portable devices. The chip contains multiple functional modules, including a boost converter, a buck converter, a battery charging management, etc., which can realize functions such as battery charging and power management. Specifically, its main features are as follows:

[0105] Highly integrated: The MPQ8113GJ-AEC1-Z integrates multiple modules, including a boost converter, a buck converter, and battery charge management, to implement a variety of power management functions.

[0106] High efficiency: The chip adopts advanced power management technology to achieve high-efficiency power management and reduce system energy consumption.

[0107] Peak current protection: The chip supports functions such as over-current protection and short-circuit protection, which can effectively protect the system power supply from damage.

[0108] Small Package: The MPQ8113GJ-AEC1-Z is available in a small package, making it suitable for use in portable devices.

[0109] In the embodiment of the utility model, the voltage value of the first DC voltage source is 12V, the voltage value of the second DC voltage source is 5V, the monitoring resistor is 50mΩ, the resistance value of resistor R9 and resistor R10 is 10Ω, and the capacitance value of capacitor C10 and capacitor C11 is 0.1μF.

[0110] In an embodiment of the utility model, the U1 chip extracts the voltage difference across the monitoring resistor R8, and then amplifies it and outputs it to the analog-to-digital conversion port of the Soc chip at the OUT port of U1. Since the power of the heating wire PTC is 12V / 0.6A, the monitoring resistor is set to 50mΩ. At the same time, the first DC voltage source of the main control circuit also powers the protection circuit.

[0111] See also Figure 3 , is a schematic diagram of a protection circuit shown in an embodiment of the utility model. In the embodiment of the utility model, optionally, the protection circuit specifically includes:

[0112] Resistor R5 and resistor R6.

[0113] Transistor Q2 and transistor Q0001.

[0114] And, capacitor C009.

[0115] in,

[0116] A resistor R5 and a capacitor C0009 are connected in parallel between the emitter and the collector of the transistor Q2.

[0117] The collector of transistor Q2 is connected to the coaxial mainframe circuit part, and the base is connected to the collector of transistor Q0001 through resistor R6.

[0118] The base of transistor Q0001 is connected to the first control enable port of the Soc chip, and the emitter is grounded.

[0119] In the embodiment of the utility model, the model of the transistor Q2 is S-LMBT493PELT1G, the operating temperature thereof is between -30°C and 130°C, and the operating voltage thereof is between 3V and 8V.

[0120] In the embodiment of the utility model, the model of the transistor Q0001 is S-LMUN2211LT1G, its operating temperature is between -30°C and 125°C, and its operating voltage is between 3.5V and 6.5V.

[0121] In the embodiment of the present invention, the resistance value of the resistor R5 is 100Ω, the resistance value of the resistor R6 is 10Ω, and the capacitance value of the capacitor C0009 is 0.01μF.

[0122] In an embodiment of the utility model, the base of transistor Q0001 is connected to the first control enable port Poweron of the Soc chip. The Soc chip receives the amplified voltage sent by the main control circuit, converts it into a digital signal, and determines whether the voltage is within the operating voltage range of the heating wire through internal logic, and generates a result level signal to send to the base of the protection transistor Q0001. The protection circuit is turned on or off through the result level signal.

[0123] See also Figure 4 , is a schematic diagram of a heating wire control circuit shown in an embodiment of the utility model. In the embodiment of the utility model, optionally, the heating wire control circuit specifically includes:

[0124] Transistor Q3 and transistor Q0004.

[0125] Resistor R0012.

[0126] Capacitor C0008 and capacitor C0012.

[0127] and, a third DC voltage source.

[0128] in,

[0129] The emitter of transistor Q3 is connected to the coaxial camera circuit part, the collector of transistor Q3 is connected to the heating wire input end, the base of transistor Q3 is connected to the power supply module through transistor C0012 and resistor R11, and transistor C0012 is connected in parallel with resistor R11.

[0130] The collector of the transistor Q0004 is connected to the base of the transistor Q3, the emitter of the transistor Q0004 is connected to the control end of the serializer, and the base of the transistor Q0004 is connected to the third DC voltage source.

[0131] In the embodiment of the utility model, the model of the transistor Q3 is S-LMBT493PELT1G, the operating temperature thereof is between -30°C and 130°C, and the operating voltage thereof is between 3V and 8V.

[0132] In the embodiment of the utility model, the model of the transistor Q0004 is S-LMUN2211LT1G, its operating temperature is between -30°C and 125°C, and its operating voltage is between 3.5V and 6.5V.

[0133] In the embodiment of the present invention, the resistance value of the resistor R11 is 100 kΩ, the resistance value of the resistor R0012 is 10 Ω, and the capacitance value of the capacitor C0012 is 0.01 μF.

[0134] The circuit application of the heating wire control circuit is a combination switch, which mainly realizes PTC power supply control. When the camera video stream is not working, the control end of the serializer is at a low level. At this time, the emitter of transistor Q0004 is turned on at a low level, and transistor Q0004 is turned on, and then the B pole of transistor Q3 is pulled low, transistor Q3 is turned on, and the heating wire starts to work; when the camera video stream is working normally, the control end of the serializer is at a high level, and the high level of the POC power supply output end is loaded to the B pole of transistor Q3, transistor Q3 is closed, and the heating wire stops working.

[0135] Embodiment 2: The utility model proposes a circuit protection board, comprising: a new vehicle camera heating and power supply system, the system is integrated on a circuit substrate; the battery protection board comprises: the vehicle camera heating and power supply system, and a circuit substrate, the vehicle camera heating and power supply system is integrated on the circuit substrate.

[0136] To sum up, the utility model proposes a novel vehicle camera heating power supply system and circuit protection board, in which a main control circuit, a protection circuit and a heating wire control circuit are added to the host circuit and the camera circuit; the main control circuit is used to provide power to the heating wire and detect the loop current, and is connected to the protection circuit; the protection circuit and the heating wire control circuit are used to control the opening and closing of the camera heating function, the protection circuit and the heating wire control circuit are connected through a coaxial cable, and the heating wire control circuit directly supplies power to the camera heating wire.

[0137] Through the coordinated cooperation of the main control circuit, the protection circuit and the heating wire control circuit, the camera heating power supply system proposed in the utility model can realize the camera heating function more stably and safely. At the same time, the system has a simple circuit structure and low cost, which is conducive to large-scale production.

[0138] In several embodiments provided by the present utility model, it is understood that each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved.

[0139] The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the protection scope of the utility model. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A novel automotive camera heating power supply system, comprising a POC power supply module, a deserializer and a Soc chip in a host circuit, and a POC power supply module, a serializer and a sensor in a camera circuit. A coaxial line is provided between the host circuit and the camera circuit for connection, and the Soc chip is connected to the POC power supply module, characterized in that: Adding a main control circuit and a protection circuit to the host circuit end; Adding a heating wire control circuit to the camera circuit end; in, The main control circuit is connected to the protection circuit, and the protection circuit is connected to the heating wire control circuit through the coaxial line; The Soc chip is connected to the main control circuit and the protection circuit; The heating wire control circuit is connected to the POC power taking module.

2. According to claim 1, a novel vehicle camera heating power supply system is characterized in that: The heating power supply system further includes: When the Soc chip controls the POC power supply module to cut off power, the main control circuit starts to supply power. When the current of the main control circuit reaches the current operating range of the heating wire, the protection circuit is turned on, and the current is supplied to the heating wire control circuit through the protection circuit; the heating wire control circuit is turned on, and the heating wire enters the working state.

3. According to claim 2, a novel vehicle camera heating power supply system is characterized in that: The heating power supply system further includes: When the Soc chip controls the POC power supply module to turn on, the heating wire control circuit is disconnected, the heating wire enters an idle state, and the main control circuit stops supplying power.

4. According to claim 3, the novel vehicle camera heating power supply system is characterized in that: The main control circuit comprises: The power integrated management chip U1 includes an RG1 port, an RG2 port, a VCC port, a V5 port, an OUT port and a GND port; monitoring resistor R8, resistor R9 and resistor R10; Capacitor C10 and capacitor C11; a first DC voltage source and a second DC voltage source; in, One end of the monitoring resistor R8 is connected to the first DC voltage source, and the other end is connected to the RG2 port. The RG1 port and the VCC port are connected to a first DC voltage source; One end of capacitor C11 is connected to the RG1 port and the VCC port, and the other end is grounded; The V5 port is connected to the second DC voltage source via the resistor R9; One end of capacitor C10 is connected to the V5 port, and the other end is grounded; The OUT port is connected to the analog-to-digital conversion port of the Soc chip through resistor R10; The GND port is connected to ground.

5. According to claim 4, the novel vehicle camera heating power supply system is characterized in that: The protection circuit comprises: Resistor R5 and resistor R6; Transistor Q2 and Transistor Q0001 and, capacitor C009; in, A resistor R5 and a capacitor C0009 are connected in parallel between the emitter and collector of transistor Q2; The collector of transistor Q2 is connected to the main circuit part of the coaxial line, and the base is connected to the collector of transistor Q0001 through resistor R6; The base of transistor Q0001 is connected to the first control enable port of the Soc chip, and the emitter is grounded.

6. According to the novel vehicle camera heating power supply system of claim 5, it is characterized in that: The heating wire control circuit comprises: Transistor Q3 and transistor Q0004; Resistor R0012; Capacitor C0008 and capacitor C0012; and, a third DC voltage source; in, The emitter of transistor Q3 is connected to the coaxial camera circuit part, the collector of transistor Q3 is connected to the input end of the heating wire, the base of transistor Q3 is connected to the power taking module through transistor C0012 and resistor R11, and transistor C0012 is connected in parallel with resistor R11; The collector of the transistor Q0004 is connected to the base of the transistor Q3, the emitter of the transistor Q0004 is connected to the control end of the serializer, and the base of the transistor Q0004 is connected to the third DC voltage source.

7. The novel vehicle camera heating power supply system according to claim 6 is characterized in that: The main control circuit is connected to the protection circuit, specifically: The emitter of transistor Q2 is connected to monitoring resistor R8; The camera heating wire power supply switch is connected to the power taking module, specifically: The base of transistor Q3 is connected to the output terminal of the POC power supply.

8. A circuit protection board, characterized in that: include: A novel vehicle camera heating and power supply system as claimed in any one of claims 1 to 7, wherein the system is integrated on a circuit substrate; The battery protection board includes: the vehicle camera heating and power supply system and a circuit substrate, and the vehicle camera heating and power supply system is integrated on the circuit substrate.

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