Camera temperature control system and camera

Abstract

The utility model provides a camera temperature control system and a camera. A temperature detection circuit obtains a camera temperature value in real time and outputs a voltage value corresponding to the camera temperature value; the obtained voltage value is stored in a register through a serializer; transmitting the voltage value in the register to the main control unit according to a deserializer; and the main control unit turns off the camera or heats the camera according to the voltage value. According to the invention, the problems of large occupied space and complex control in the existing camera temperature control scheme are solved, the problem of large temperature acquisition deviation in hardware transmission is solved, the risk of hard wire falling is avoided, and the temperature control cost is effectively reduced.

Description

Technical Field

[0001] The present application belongs to the field of temperature sensing technology, and specifically relates to a camera temperature control system and a camera. Background Art

[0002] Currently, the temperature detection of cameras mostly uses thermistors for AD detection. The voltage value at the camera end is obtained in real time through a hard-wired mainboard, and the temperature information of the camera is obtained by looking up a table. This method transmits the collected temperature information through hard wires. There may be a large error between the transmitted temperature information and the actual temperature information. There is also a risk that the hard wire may fall off, resulting in the inability to transmit information normally. A protection circuit needs to be reserved in the design, which makes the hardware cost relatively high.

[0003] By installing a temperature sensor near the camera, the temperature information collected by the temperature sensor is compensated for and transmitted to the CMS host as the temperature information of the camera. This design method requires attention to the location of the temperature sensor, which has the problem of occupying a large space. In addition, the motherboard side requires more ports to obtain the information transmitted by the temperature sensor and control the operation of the temperature sensor, which is more complicated in design and has a relatively high hardware cost.

[0004] By integrating a temperature sensor chip on the camera mainboard, the temperature information collected by the temperature sensor chip is transmitted to the host. This design requires powering the temperature sensor, and controlling it will occupy more space on the camera mainboard. The hardware cost is relatively high. Summary of the invention

[0005] In order to solve the above technical problems, the present application proposes a camera temperature control system, which obtains the camera temperature value in real time through a temperature detection circuit and outputs a voltage value corresponding to the camera temperature value; obtains the voltage value in real time through a serializer and stores it in a register; transmits the voltage value in the register to a main control unit through a deserializer; and the main control unit turns off the camera or heats the camera according to the voltage value.

[0006] Specifically, the present application provides a camera temperature control system, the system comprising:

[0007] Temperature detection circuit, serializer, deserializer and main control unit;

[0008] A temperature detection circuit, used to obtain the camera temperature value in real time and output a voltage value corresponding to the camera temperature value;

[0009] A serializer, used for storing the acquired voltage value in a register;

[0010] A deserializer, used for transmitting the voltage value in the register to the main control unit;

[0011] The main control unit turns off the camera or heats the camera according to the voltage value.

[0012] The system mentioned in this application solves the problems of large space occupation and complex control in existing camera temperature detection solutions. It also solves the problem of large temperature collection deviation in hardware transmission, avoids the risk of hard wire falling off, and effectively reduces the cost of camera temperature detection.

[0013] Further, the temperature detection circuit is composed of a thermistor, a pull-up power supply and a pull-up resistor;

[0014] Wherein, the resistance value of the thermistor is obtained according to the camera temperature value, and according to the thermistor resistance value combined with the pull-up power supply and the pull-up resistor, a voltage value corresponding to the camera temperature value is output, and the voltage value is transmitted to the serializer.

[0015] Further, the serializer is composed of a built-in ADC module and registers;

[0016] The voltage value of the temperature detection circuit is acquired in real time through the built-in ADC module, and the voltage value is stored in the register.

[0017] A FAKRA connector is also provided between the serializer and the deserializer for connection. The FAKRA connector adopts a standardized design to ensure compatibility and interchangeability between different devices and ensure stable and reliable connection; the FAKRA connector has excellent high-frequency transmission performance to ensure stability and reliability of signal transmission.

[0018] Furthermore, the voltage value is transmitted between the deserializer and the main control unit via an I2C bus. Transmitting the voltage value via the I2C bus reduces hard-line errors and risks, and effectively reduces the transmission cost of the voltage value.

[0019] Furthermore, a control switch is provided between the main control unit and the camera; the control switch turns on or off the camera according to a high level or a low level sent by the main control unit.

[0020] A high side switch and a heating wire are also arranged between the main control unit and the camera; wherein the high side switch controls the heating wire to enter a working state or a disconnected state according to a high level or a low level sent by the main control unit.

[0021] Furthermore, the high-side switch and the heating wire are connected via the connector. Connecting according to the connector ensures a safe connection between the power line and the heating wire, avoiding dangerous situations such as short circuit or disconnection. Connecting according to the connector can separate the heating wire from the power line, so that when the heating wire needs to be maintained or replaced, only the connector needs to be replaced without changing the circuit wiring. Connecting the heating wire via the connector allows the heating camera to operate effectively and safely, and is convenient for maintenance and management.

[0022] Furthermore, the temperature detection circuit, serializer and heating wire are installed at the camera end;

[0023] The deserializer, the main control unit and the high side switch are installed at the control end.

[0024] The principle process based on the above camera temperature control system when applied is as follows:

[0025] S1: obtaining the camera temperature value in real time through the temperature detection circuit and outputting the voltage value corresponding to the camera temperature value;

[0026] S2: acquiring the voltage value in real time through a serializer and storing it in a register;

[0027] S3: Transmitting the voltage value in the register to the main control unit through the deserializer;

[0028] S4: the main control unit determines whether the temperature value of the camera is within a normal working range according to the voltage value, and outputs a corresponding temperature control instruction according to the determination result;

[0029] S5: Controlling the camera to enter different working modes according to the temperature control instruction.

[0030] Furthermore, the step S1 comprises:

[0031] According to the resistance value of the thermistor in the temperature detection circuit, the voltage value of the pull-up power supply and the resistance value of the pull-up resistor, the voltage value of the temperature detection circuit is obtained by calculating through a voltage value calculation formula;

[0032] The voltage value calculation formula is specifically:

[0033] U 检测 =(U 上拉 / (R+R 热 ))*R 热 ;

[0034] Among them, U 检测 Indicates the voltage value of the temperature detection circuit, U 上拉 Indicates the voltage value of the pull-up power supply, R indicates the pull-up resistor, R 热Indicates thermistor;

[0035] The resistance value of the pull-up resistor is added to the resistance value of the thermistor to obtain a calculation result one, and then the voltage value of the pull-up power supply is divided by the calculation result one to obtain a calculation result two, and then the calculation result two is multiplied by the resistance value of the thermistor to calculate and obtain the voltage value of the temperature detection circuit.

[0036] Furthermore, the step S4 is specifically:

[0037] The main control unit obtains the camera temperature value corresponding to the voltage value by looking up the table according to the voltage value;

[0038] When the camera temperature value is within the normal working range, the current camera state is maintained;

[0039] When the camera temperature value is greater than the maximum temperature threshold, an instruction to turn off the camera is output;

[0040] When the camera temperature value is less than the minimum temperature threshold, a camera heating instruction is output.

[0041] Furthermore, the step S5 is specifically:

[0042] According to the camera shut down instruction, the camera is controlled to enter working mode one; the working mode one is to shut down the camera power supply; the working mode one can ensure the safety of camera use.

[0043] According to the camera heating instruction, the camera is controlled to enter working mode 2; the working mode 2 is to heat the camera by controlling the heating wire through the high side switch. By heating the camera, it is ensured that the camera can work normally in a low temperature environment, and heating the camera by the heating wire can better ensure the stability of the device operation.

[0044] Based on the same inventive concept, the present application also proposes a camera, which controls the temperature of the camera according to the camera temperature control system.

[0045] In summary, the present application obtains the camera temperature value in real time through a temperature detection circuit and outputs a voltage value corresponding to the camera temperature value; obtains the voltage value in real time through a serializer and stores it in a register; transmits the voltage value in the register to the main control unit through a deserializer; and the main control unit turns off the camera or heats the camera according to the voltage value.

[0046] Compared with the prior art, this application has at least the following beneficial effects:

[0047] The system mentioned in this application solves the problems of large space occupation and complex control in existing camera temperature control solutions. It also solves the problem of large temperature collection deviation in hardware transmission, avoids the risk of hard wire falling off, and effectively reduces the cost of camera temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the framework of the camera temperature control system shown in the embodiment of the present application.

[0049] Figure 2 It is a schematic diagram of a camera temperature control system shown in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] Embodiment 1:

[0052] Reference Figure 1 , is a schematic diagram of a camera temperature control system according to an embodiment of the present application;

[0053] The present application proposes a camera temperature control system, the system comprising:

[0054] Temperature detection circuit, serializer, deserializer and main control unit;

[0055] Wherein, the temperature detection circuit is used to obtain the camera temperature value in real time and output the voltage value corresponding to the camera temperature value; the temperature detection circuit is composed of a thermistor, a pull-up power supply and a pull-up resistor;

[0056] Wherein, the resistance value of the thermistor is obtained according to the camera temperature value, and the voltage value corresponding to the camera temperature value is output according to the resistance value of the thermistor in combination with the pull-up power supply and the pull-up resistor, and the voltage value is transmitted to the serializer. As the camera temperature value increases, the resistance value of the thermistor decreases; as the camera temperature value decreases, the resistance value of the thermistor increases.

[0057] A serializer, used for storing the acquired voltage value in a register;

[0058] The serializer is composed of a built-in ADC module and registers;

[0059] The voltage value of the temperature detection circuit is acquired in real time through the built-in ADC module, and the voltage value is stored in the register.

[0060] Among them, the built-in ADC module is connected to the temperature detection circuit, and the temperature detection circuit transmits the voltage value to the input ADC pin of the built-in ADC module, so as to detect the voltage value of the temperature detection circuit in real time; the built-in ADC module stores the voltage value on the input ADC pin in a data register.

[0061] A deserializer, used to obtain the voltage value in the register and transmit the voltage value in the register to the main control unit;

[0062] A FAKRA connector is also provided between the serializer and the deserializer for connection.

[0063] Among them, the FAKRA connector is a standardized solderless connector for automotive electronic systems; the FAKRA connector adopts a standardized design to ensure compatibility and interchangeability between different devices and ensure stable and reliable connections; the FAKRA connector has excellent high-frequency transmission performance to ensure the stability and reliability of signal transmission.

[0064] Furthermore, the voltage value is transmitted between the deserializer and the main control unit via an I2C bus. Transmitting the voltage value via the I2C bus reduces hard-line errors and risks, and effectively reduces the transmission cost of the voltage value.

[0065] The main control unit turns off the camera or heats the camera according to the voltage value.

[0066] Preferably, the main control unit may be a central processing unit main control unit, an embedded system main control unit, a network router main control unit or an automotive electronic main control unit.

[0067] A control switch is provided between the main control unit and the camera; the control switch turns on or off the camera according to a high level or a low level sent by the main control unit.

[0068] A high side switch and a heating wire are also arranged between the main control unit and the camera; wherein the high side switch controls the heating wire to enter a working state or a disconnected state according to a high level or a low level sent by the main control unit.

[0069] A connector is also provided between the high side switch and the heating wire. Connection according to the connector ensures a safe connection between the power line and the heating wire, avoiding dangerous situations such as short circuit or disconnection. Connection according to the connector can separate the heating wire from the power line, so that when the heating wire needs to be maintained or replaced, only the connector needs to be replaced without changing the circuit wiring. Connecting the heating wire through the connector allows the heating camera to operate effectively and safely, and is convenient for maintenance and management.

[0070] Furthermore, the temperature detection circuit, serializer and heating wire are installed at the camera end; the deserializer, main control unit and high-side switch are installed at the control end.

[0071] The camera end and the control end are connected via a coaxial line, and the coaxial line is used to transmit the voltage value and the configuration information of the serializer and the deserializer, as well as the data communication between the deserializer and the serializer.

[0072] Reference Figure 2 It is a schematic diagram of a camera temperature control system shown in an embodiment of the present application.

[0073] Furthermore, when the above camera temperature control system is used, the principle process is as follows:

[0074] S1: obtaining the camera temperature value in real time through the temperature detection circuit and outputting the voltage value corresponding to the camera temperature value;

[0075] Furthermore, the step S1 comprises:

[0076] According to the resistance value of the thermistor in the temperature detection circuit, the voltage value of the pull-up power supply and the resistance value of the pull-up resistor, the voltage value of the temperature detection circuit is obtained by calculating through a voltage value calculation formula;

[0077] The voltage value calculation formula is specifically:

[0078] U 检测 =(U 上拉 / (R+R 热 ))*R 热 ;

[0079] Among them, U 检测 Indicates the voltage value of the temperature detection circuit, U 上拉 Indicates the voltage value of the pull-up power supply, R indicates the pull-up resistor, R 热 Indicates thermistor;

[0080] The resistance value of the pull-up resistor is added to the resistance value of the thermistor to obtain a calculation result one, and then the voltage value of the pull-up power supply is divided by the calculation result one to obtain a calculation result two, and then the calculation result two is multiplied by the resistance value of the thermistor to calculate and obtain the voltage value of the temperature detection circuit.

[0081] Preferably, if the current camera temperature value is 100, the resistance value of the thermistor is 60, the resistance value of the pull-up resistor is 50, and the voltage value of the pull-up power supply is 220, when the temperature value is 100 according to the voltage value calculation formula, the temperature detection circuit voltage value corresponding to the temperature value is 120.

[0082] S2: acquiring the voltage value in real time through a serializer and storing it in a register;

[0083] Furthermore, the step S2 is specifically:

[0084] The temperature detection circuit is connected through the built-in ADC module of the serializer, and the temperature detection circuit transmits the voltage value to the input ADC pin of the built-in ADC module to detect the voltage value of the temperature detection circuit in real time; the built-in ADC module stores the voltage value on the input ADC pin in a data register.

[0085] S3: Transmitting the voltage value in the register to the main control unit through the deserializer;

[0086] Furthermore, the step S3 is specifically:

[0087] The deserializer obtains the voltage value stored in the register and transmits the voltage value to the main control unit through the I2C bus; transmitting the voltage value through the I2C bus reduces hard-line errors and existing risks, and effectively reduces the transmission cost of the voltage value.

[0088] S4: the main control unit determines whether the temperature value of the camera is within a normal working range according to the voltage value, and outputs a corresponding temperature control instruction according to the determination result;

[0089] Furthermore, the step S4 is specifically:

[0090] The main control unit obtains the camera temperature value corresponding to the voltage value by looking up the table according to the voltage value;

[0091] When the camera temperature value is within the normal working range, the current camera state is maintained;

[0092] When the camera temperature value is greater than the maximum temperature threshold, an instruction to turn off the camera is output;

[0093] When the camera temperature value is less than the minimum temperature threshold, a camera heating instruction is output.

[0094] Preferably, if the minimum temperature threshold is 0, the maximum temperature threshold is 40, and the voltage value received by the main control unit is 120, then according to the table lookup method, the current camera temperature value is obtained as 100, and according to the judgment that the current camera temperature value is greater than the maximum temperature threshold, the main control unit outputs a command to turn off the camera.

[0095] S5: Controlling the camera to enter different working modes according to the temperature control instruction.

[0096] According to the camera shut down instruction, the camera is controlled to enter working mode one; the working mode one is to shut down the camera power supply; the working mode one can ensure the safety of camera use.

[0097] According to the camera heating instruction, the camera is controlled to enter working mode 2; the working mode 2 is to heat the camera by controlling the heating wire through the high side switch. By heating the camera, it is ensured that the camera can work normally in a low temperature environment, and heating the camera by the heating wire can better ensure the stability of the device operation.

[0098] Preferably, if the received temperature control instruction is an instruction to turn off the camera, the camera is controlled to enter working mode one, and the camera power is turned off to ensure the safe use of the camera; if the received temperature control instruction is an instruction to heat the camera, the camera is controlled to enter working mode two, and the heating wire is controlled by the high-side switch to heat the camera until the camera temperature value reaches the normal working range.

[0099] Embodiment 2:

[0100] The present application also proposes a camera, which controls the temperature of the camera according to the camera temperature control system.

[0101] The camera can obtain the camera temperature value in real time through the temperature detection circuit and output the voltage value corresponding to the camera temperature value; obtain the voltage value in real time through the serializer and store it in the register; transmit the voltage value in the register to the main control unit through the deserializer; the main control unit judges whether the camera temperature value is within the normal working range according to the voltage value, and outputs the corresponding temperature control instruction according to the judgment result; controls the camera to enter different working modes according to the temperature control instruction, and performs corresponding temperature control according to the corresponding working mode.

[0102] In summary, the present application obtains the camera temperature value in real time through a temperature detection circuit and outputs the voltage value corresponding to the camera temperature value; obtains the voltage value in real time through a serializer and stores it in a register; transmits the voltage value in the register to the main control unit through a deserializer; the main control unit turns off the camera or heats the camera according to the voltage value. The present application solves the problems of large space occupation and complex control in existing camera temperature control solutions, and solves the problem of large temperature acquisition deviation in hardware transmission, and also avoids the risk of hard wire falling off, effectively reducing the cost of temperature control.

[0103] In several embodiments provided in the present application, 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 realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order 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.

[0104] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for enabling an electronic device to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0105] The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the scope of protection of the present application. 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 present application should be included in the scope of protection of the present application.

Claims

1. A camera temperature control system, characterized in that: include: Temperature detection circuit, serializer, deserializer and main control unit; A temperature detection circuit, used to obtain the camera temperature value in real time and output a voltage value corresponding to the camera temperature value; A serializer, used for storing the acquired voltage value in a register; A deserializer, used for transmitting the voltage value in the register to the main control unit; The main control unit turns off the camera or heats the camera according to the voltage value.

2. A camera temperature control system according to claim 1, characterized in that: The serializer comprises: Built-in ADC module and register; The voltage value of the temperature detection circuit is acquired in real time through the built-in ADC module, and the voltage value is stored in the register.

3. A camera temperature control system according to claim 2, characterized in that: A FAKRA connector is also provided between the serializer and the deserializer for connection.

4. A camera temperature control system according to claim 3, characterized in that: The voltage value is transmitted between the deserializer and the main control unit via an I2C bus.

5. A camera temperature control system according to claim 4, characterized in that: A control switch is provided between the main control unit and the camera; the control switch turns on or off the camera according to a high level or a low level sent by the main control unit.

6. A camera temperature control system according to claim 5, characterized in that: A high side switch and a heating wire are also provided between the main control unit and the camera; wherein the high side switch controls the heating wire to enter a working state or a disconnected state according to a high level or a low level sent by the main control unit.

7. A camera temperature control system according to claim 6, characterized in that: A connector is also provided between the high side switch and the heating wire.

8. A camera temperature control system according to claim 7, characterized in that: The temperature detection circuit, serializer and heating wire are installed at the camera end.

9. A camera temperature control system according to claim 8, characterized in that: The deserializer, the main control unit and the high side switch are installed at the control end.

10. A camera, characterized in that: The camera uses the temperature control system described in any one of claims 1-9 to control the temperature of the camera.

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