CN116781999A

CN116781999A - Camera assembly, vehicle-mounted system and vehicle

Info

Publication number: CN116781999A
Application number: CN202210219609.2A
Authority: CN
Inventors: 邱杰; 吴雅萍; 张恒强
Original assignee: Faurecia Clarion Electronics Xiamen Co Ltd
Current assignee: Faurecia Clarion Electronics Xiamen Co Ltd
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2023-09-19
Also published as: WO2023169266A1

Abstract

The application discloses a camera assembly, a vehicle-mounted system and a vehicle, relates to the technical field of camera devices, and is used for solving the problems of camera fogging, frosting or icing and the like. The camera assembly comprises a camera, a first coil, a second coil and a heating piece. Wherein, first coil sets up on the camera. The second coil is arranged on the camera and used for receiving the magnetic field generated by the first coil and converting the magnetic field into current. The heating element is electrically connected with the second coil and is used for receiving current generated by the second coil and generating heat to heat the camera. The application is used for the camera.

Description

Camera assembly, vehicle-mounted system and vehicle

Technical Field

The application relates to the technical field of camera devices, in particular to a camera assembly, a vehicle-mounted system and a vehicle.

Background

With the development of electronic intelligence, cameras are widely applied in various fields, but when the cameras are used outdoors in cold and humid environments, natural phenomena such as atomization, icing and the like are easily generated by the lenses of the cameras. Under the condition, the imaging effect of the camera is poor, and if the camera is not cleaned in time, the use of a user is affected.

Disclosure of Invention

The embodiment of the application provides a camera assembly, a vehicle-mounted system and a vehicle, which are used for solving the problem of lens fogging or icing of a camera.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical scheme:

the application provides a camera assembly, which comprises a camera, a first coil, a second coil and a heating piece. Wherein, first coil sets up on the camera. The second coil is arranged on the camera and used for receiving the magnetic field generated by the first coil and converting the magnetic field into current. The heating element is electrically connected with the second coil and is used for receiving current generated by the second coil and generating heat to heat the camera.

In this case, a varying current (e.g., an alternating current) may be supplied to the first coil, such that the first coil may generate an alternating magnetic field under the influence of the varying current. In this case, the second coil receives the magnetic field and converts the magnetic energy into electric energy, thereby generating a varying current in the second coil. The heating element is electrically connected with the second coil, so that current in the second coil can flow through the heating element, and the heating element is arranged on the camera, so that heat generated by the heating element under the action of the current can heat the camera.

Further, the camera comprises a lens seat and a lens group, wherein the lens seat is provided with a first mounting cavity. The lens group is positioned in the first mounting cavity. The heating element is arranged between the lens group and the inner wall of the first installation cavity or on the outer wall of the first installation cavity.

Further, the camera comprises a lens base, a lens group and an image sensor. The lens seat is provided with a first installation cavity and a second installation cavity communicated with the first installation cavity. The lens group is positioned in the first mounting cavity. The image sensor is positioned in the second mounting cavity and is used for receiving light rays from the lens group and performing photoelectric conversion;

the heating element is arranged between the image sensor and the inner wall of the second mounting cavity, or is arranged at the position, close to the image sensor, of the outer wall of the second mounting cavity.

Further, the camera also comprises a transmission chip, wherein the transmission chip is positioned in the second mounting cavity and is electrically connected with the image sensor, and the heating element is arranged between the transmission chip and the inner wall of the second mounting cavity or is arranged on the outer wall of the second mounting cavity and is close to the transmission chip.

Further, the camera assembly further comprises at least one insulating sleeve, at least one of the first coil, the second coil and the heating element is wrapped in the insulating sleeve, and the insulating sleeve is arranged on the camera.

Further, the camera is nested in an insulating sleeve, which is a thermoplastic sleeve.

Further, the heating element is one or both of a resistance wire and a heating film.

Further, the camera component further comprises a temperature control resistor, and the temperature control resistor is connected with the heating element in series.

In one aspect, the application further provides a vehicle-mounted system, which comprises an electronic control unit and the camera assembly in the technical scheme, wherein the camera assembly is electrically connected with the electronic control unit.

The vehicle-mounted system provided by the embodiment of the application can obtain the same technical effects as the camera assembly provided by the embodiment, and is not repeated here.

Further, the electronic control unit includes an image processor, a microcontroller, and a power chip. The image processor is electrically connected with the camera and is used for receiving the electric signals from the camera, generating image data and obtaining the definition of the image data. The microcontroller is electrically connected with the image processor and is used for sending out a control instruction if the definition is smaller than the definition threshold. The power chip is electrically connected with the microcontroller and the first coil in the camera component, and the power chip is used for supplying power to the first coil according to the control instruction.

In another aspect, the application further provides a vehicle, which comprises a vehicle body and the vehicle-mounted system mentioned in the technical scheme, wherein the vehicle-mounted system is mounted on the vehicle body.

The vehicle provided by the embodiment of the present application can obtain the same technical effects as the vehicle-mounted system provided by the above embodiment, and will not be described herein again.

Drawings

FIG. 1 is a schematic illustration of a vehicle according to an embodiment of the present application;

fig. 2 is a schematic diagram of an electrical connection between a camera assembly and an electronic control unit according to an embodiment of the present application;

FIG. 3 is a detailed view of the partial group of FIG. 2 provided by an embodiment of the present application;

FIG. 4 is an external schematic view of the first coil, the second coil and the heating element according to the embodiment of the present application after being mounted;

FIG. 5 is a circuit diagram of a first coil, a second coil and a heating element according to an embodiment of the present application;

FIG. 6a is a schematic cross-sectional view of a first heating element mounted at a lens assembly according to an embodiment of the present application;

FIG. 6b is a schematic cross-sectional view of a second heating element provided in an embodiment of the present application mounted at a lens group;

FIG. 7a is a schematic cross-sectional view of a first heating element mounted at an image sensor according to an embodiment of the present application;

FIG. 7b is a schematic cross-sectional view of a second heating element provided in an embodiment of the present application mounted at an image sensor;

FIG. 8a is a schematic cross-sectional view of a first heating element mounted at a transfer chip according to an embodiment of the present application;

FIG. 8b is a schematic cross-sectional view of a second heating element mounted at a transfer chip according to an embodiment of the present application;

FIG. 9 is a schematic cross-sectional view of a heating element mounting substrate according to an embodiment of the present application;

FIG. 10 is a schematic cross-sectional view of another heating element mounting substrate according to an embodiment of the present application;

FIG. 11 is a schematic cross-sectional view of a heating element provided in an embodiment of the present application mounted at a connector;

FIG. 12 is a schematic view of two heating elements provided by an embodiment of the present application mounted at a camera;

FIG. 13 is a circuit diagram of a temperature-controlled resistor and a heating element according to an embodiment of the present application;

FIG. 14 is a schematic cross-sectional view of an insulating sleeve and a heating element after installation according to an embodiment of the present application;

FIG. 15 is a schematic cross-sectional view of an insulation sleeve and a heating element after installation according to an embodiment of the present application;

FIG. 16 is a schematic diagram of the positional relationship among a first coil, a first sleeve and a second sleeve according to an embodiment of the present application;

fig. 17 is a schematic cross-sectional view of a first coil fixed to a camera through a first sleeve and a second sleeve according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The electrical connection mentioned in the embodiment of the application can be a wired connection or a wireless connection.

The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The camera is applied to various fields such as vehicles, outdoor monitoring and motion cameras. When the camera is subjected to supercooling and hot switching in cold, humid weather or environment, a lens group (lens) can generate a fogging phenomenon. Alternatively, the surface of the bare lens group is sublimated, thereby forming frost. These problems of fogging or frosting can seriously affect the definition of an image shot by a camera and affect the imaging effect of a lens. The application is illustrated by way of example in a vehicle.

As shown in fig. 1, an embodiment of the present application provides a vehicle 100, and the vehicle 100 may be a car, a passenger car, a trailer, or the like, and the vehicle 100 may include a body 20. In addition, the vehicle 100 may further include an in-vehicle system 10 as shown in fig. 2, wherein the in-vehicle system 10 may be mounted on the body 20 in fig. 1. As shown in fig. 2, the in-vehicle system 10 may include an electronic control unit (Electronic Control Unit, ECU) 1 and a camera assembly 2, the camera assembly 2 being electrically connected with the electronic control unit 1. In some embodiments of the present application, the electronic control unit 1 may be installed inside the body 20, and the electronic control unit 1 may control the camera assembly 2, for example, turn on the camera assembly 2 to perform image acquisition on the environment outside the body 20, or the electronic control unit 1 may further receive image data acquired from the camera assembly 2 and further display the image data, thereby increasing the visual field of the driver.

Based on this, in order to be able to display the image data acquired by the camera assembly 2, the vehicle 100 may further comprise a display device electrically connected to the electronic control unit 1. The display device may be disposed in the body 20, and the application is not limited to the type of display device, and for example, the display device may include a plasma or digital projection assembly, a liquid crystal display, and the like.

The above-mentioned mounting position of the camera module 2 is exemplified below. For example, in some embodiments of the present application, the area and adjustment angle of the rearview mirrors mounted on the left and right sides of the body 20 are limited, resulting in a limited view of the exterior of the body as viewed by the driver through the rearview mirrors. Therefore, in order to observe the rear view of the vehicle body 20, the driver needs to tilt the head to the left and right to observe the rear of the vehicle body, and thus the driver is likely to be distracted, and the driving behavior is likely to be dangerous.

Based on this, in order to improve the view field of the driver, the camera module 2 of the embodiment of the present application may be mounted on at least one of two rear view mirrors at both left and right sides of the front of the body of the vehicle 100 (refer to fig. 1). In this way, the camera module 2 allows the driver to observe the rear view of the vehicle 100 in the vehicle body 20, and the driver can observe the rear of the vehicle body without tilting his/her head, which contributes to an improvement in the driver's attention.

The above description is given of the mounting position and application scenario of the camera module 2 by taking the example that the camera module 2 is mounted on the rear view mirrors on the left and right sides of the vehicle body 20. In other embodiments of the present application, the camera module 2 may be mounted on two sides of the rear portion of the vehicle body, the front end of the vehicle body (for example, a bus, the vehicle body is higher, and the front end of the vehicle body has a certain view angle blind area), etc.

The above description has been given taking the example in which the camera module 2 is mounted on the vehicle body 20. In other embodiments of the present application, the camera assembly 2 described above may also be applied to other outdoor fields, such as outdoor monitoring systems, traffic monitoring systems, and property monitoring systems. Alternatively, in other embodiments, the camera assembly 2 described above may also be applied to a motion camera or an AVM panoramic surveillance imaging system.

The structure and the working principle of the above-mentioned electronic control unit 1 and the camera assembly 2 electrically connected thereto are exemplified below. For example, in some embodiments of the present application, as shown in fig. 3, the above-mentioned camera assembly 2 may include a camera 21 and a heating assembly 22 capable of heating the camera 21. The electronic control unit 1 may include an image processor 11, a microcontroller 12 (Microcontroller Unit, MCU) and a power chip 13. The image processor 11 is electrically connected to the camera 21, and is configured to receive an electrical signal from the camera 21, generate image data, and obtain sharpness of the image data. The microcontroller 12 is electrically connected to the image processor 11 for issuing a control command if the sharpness is smaller than the sharpness threshold. The power chip 13 is electrically connected with the microcontroller 12 and the heating component 22, and the power chip 13 is used for supplying power to the heating component 22 according to control instructions.

In this case, the image processor 11 may process the image monitored by the camera 21 to generate image data and send the image data to the microcontroller 12, the microcontroller 12 may compare the sharpness of the image data with the sharpness threshold, and if the sharpness is smaller than the sharpness threshold, send a control instruction to the power chip 13, so as to supply power to the heating component 22 according to the control instruction, thereby implementing heating of the camera 21. At this time, the heating mode and time may be set according to the requirement, for example, the heating time is: 100 ms, 200 ms, 300 ms, etc., as the application is not limited in this regard. If the definition is greater than or equal to the definition threshold, no control command is issued to the power chip 13, so that electricity is saved.

Furthermore, in some embodiments of the present application, the above-mentioned structure of the camera assembly 2 may include, for example, the camera 21 and the heating assembly 22, and the heating assembly 22 may heat the camera 21, thereby solving the above-mentioned problems. In order to more clearly express the technical solution of the present application, the following will take the application scenario as an example of taking the camera 21 as a vehicle-mounted camera. The application does not limit the type of the camera 21, and can meet the requirement of the camera 21 needing to be heated.

The above-mentioned structure of the heating assembly 22 is exemplified below, for example, in some embodiments of the present application, as shown in fig. 4, the heating assembly 22 may include a first coil 221, a second coil 222, and a heating member 223, wherein the first coil 221 is disposed on the camera 21 and electrically connected to the power chip 13, and the power chip 13 may supply a varying current. The second coil 222 is disposed on the camera 21, and is used for receiving the magnetic field generated by the first coil 221 and converting the magnetic field into electric current. The heating element 223 is electrically connected to the second coil 222, and is configured to receive the current generated by the second coil 222 and generate heat to heat the camera 21.

In this case, the first coil 221 and the second coil 222 of the present application operate on the principle as shown in fig. 5, and the power chip 13 may supply the first coil 221 with a variable current. For example, the power supply chip 13 may switch a power supply to supply the alternating current to the first coil 221.

In this case, an alternating current may be supplied to the first coil, so that the first coil may generate an alternating magnetic field under the influence of the varying current. In this case, the second coil receives the magnetic field and converts the magnetic energy into electric energy, thereby generating a varying current in the second coil. The heating element is electrically connected with the second coil, so that current in the second coil can flow through the heating element, and the heating element is arranged on the camera, so that heat generated by the heating element under the action of the current can heat the camera.

In other embodiments of the present application, the heating assembly 22 may be used alone in an AVM panoramic image system, an electronic rearview mirror, a vehicle recorder camera, or the like. And the method can also be applied to equipment such as outdoor monitoring and sports cameras. The specific type of the application device of the heating element 22 of the present application is not limited, and the device or apparatus having a lens generating picture may be satisfied.

The mounting position of the heating member 223 is illustrated below, for example, in some embodiments of the present application, the camera 21 may include a lens holder 211 and a lens group 212 as shown in fig. 6a, the lens holder 211 having a first mounting cavity 2111. Lens group 212 is positioned within first mounting cavity 2111. The lens group 212 may include a plurality of lenses, and light is incident from outside to the light incident side of the lens group and passes through the lenses, so that the transmission path of the light is affected when the lenses are frosted or fogged, thereby causing interference to imaging and further reducing the quality of the captured image.

Based on this, in order to solve the problem of unclear imaging of the lens group 212, in some embodiments of the present application, the first heating member 223 includes a first heating member 223a and a second heating member 223b. As shown in fig. 6a, first heating element 223a may be disposed between lens group 212 and an inner wall of first mounting chamber 2111, wherein the inner wall of first mounting chamber 2111 refers to a side of first mounting chamber 2111 adjacent to lens group 212. In other embodiments of the present application, as shown in fig. 6b, the second heating member 223b may be disposed on the outer wall of the first mounting cavity 2111 (i.e., the position of the first mounting cavity 2111 corresponding to the outer surface of the lens holder 211).

In this case, the heating member 223 may heat the lens assembly 212 closely or directly, which is helpful for improving the heating efficiency of the lens assembly 212, and when the heating member 223 is located in the first installation cavity 2111 of the lens holder 211, the lens holder 211 may have a certain heat-preserving effect on the heating member 223, preventing rapid loss of heat, and not affecting the external beauty of the camera 21.

In other embodiments of the application, the camera 21 may further comprise an image sensor 213 as shown in fig. 7 a. The lens mount 211 also has a second mounting cavity 2112 in communication with the first mounting cavity 2111. The image sensor 213 is located in the second mounting cavity 2112, and is configured to receive light from the lens group 212 and perform photoelectric conversion, so that the image sensor 213 can generate a corresponding image. However, when the temperature is low or the environment is wet, the picture output effect of the image sensor 213 is affected.

Based on this, in order to solve the problem of poor picture output of the image sensor 213, as shown in fig. 7a, the first heating member 223a may be disposed between the image sensor 213 and the inner wall of the second installation cavity 2112, wherein the inner wall of the second installation cavity 2112 is the side of the second installation cavity 2112 close to the image sensor 213. In other embodiments of the present application, as shown in fig. 7b, the second heating member 223b may be disposed on the outer wall of the second installation cavity 2112 near the image sensor 213, and the outer wall of the second installation cavity 2112 refers to the outer surface of the lens holder 211.

In this case, it is also necessary to ensure that the image sensor 213 is within a temperature range for normal operation under more severe temperature conditions. For example, the image sensor 213 operates at a temperature of-40 ℃ or higher to normally output a picture. At this time, a heating member 223 may be additionally installed in the vicinity of the image sensor 213, and when the ambient temperature is lower than-40 ℃, the image sensor 213 is heated to a temperature higher than-40 ℃ after a short time of heating by preheating the heating member 223. Thereby realizing that the image sensor 213 enters a normal operation state in advance.

In other embodiments of the present application, the camera 21 may further include a transmission chip 214 as shown in fig. 8a, where the transmission chip 214 is located in the second mounting cavity 2112 and is electrically connected to the image sensor 213, and the first heating element 223a is disposed between the transmission chip 214 and an inner wall of the second mounting cavity 2112, where the inner wall of the second mounting cavity 2112 is a side of the second mounting cavity 2112 near the transmission chip 214. In other embodiments of the present application, as shown in fig. 8b, the second heating element 223b is disposed on the outer wall of the second installation cavity 2112 near the transmission chip 214, and the outer wall of the second installation cavity 2112 is the outer surface of the lens holder 211 near the transmission chip 214. In this case, too low a temperature of the transfer chip 214 may affect the operation of the transfer chip 214, so that the transfer chip 214 is properly preheated or heated when the temperature is too low, which is helpful for the normal operation of the camera 21.

It should be noted that, in order to increase the heating effect, the first heating element 223a and the second heating element 223b in the above embodiment may be disposed at corresponding heating positions at the same time, which is not limited in the present application, and for convenience of description, the heating element 223 is disposed on the outer surface of the lens holder 211 for illustration.

In some embodiments of the present application, as shown in fig. 9, the image sensor 213 and the transmission chip 214 may be disposed on one substrate 215 (copper clad laminate), or may be disposed on a first substrate 2151 and a second substrate 2152, respectively, as shown in fig. 10, wherein the substrate 215 may include the first substrate 2151 and the second substrate 2152. When the number of the substrates 215 is two, the image sensor 213 may be electrically connected to the first substrate 2151, the transmission chip 214 is electrically connected to the second substrate 2152, and a space d is provided between the first substrate 2151 and the second substrate 2152. In this case, the heating member 223 may be provided at a position between the first substrate 2151 and the second substrate 2152, or may be provided outside the lens holder 211 or in the second mounting cavity 2112 of the lens holder 211, so that both the image sensor 213 and the transfer chip 214 may be preheated by the heating member 223.

In some embodiments of the present application, the camera 21 may further include a connector 216 as shown in fig. 11, the connector 216 being used to transmit information of the transmission chip 214 to the electronic control unit 1 for vehicles, and a heating member 223 may be added at the connector 216 of the lens holder 211 because the contact performance of the connector 216 may be deteriorated in a low temperature environment. Proper heating of the connector 216 ensures system transport stability.

In other embodiments of the present application, the camera 21 may further include other components (such as an infrared filter, a dust-proof gasket, and a shielding case, which are not listed in the embodiments of the present application), which are only some of the embodiments of the present application, and the present application is not limited thereto, and certain components in the camera 21 may need to be heated, that is, disposed near the components.

In other embodiments of the present application, as shown in fig. 12, there may be a plurality of heating elements 223 (two heating elements 223 are illustrated in fig. 12, for example), and two heating elements 223 are connected in series with the second coil 222, wherein one heating element 223 is disposed at the rear end of the camera 21 near the above-mentioned image sensor 213, transmission chip 214, connector 216, and the like. Another heating member 223 may be provided at the front end of the camera 21 near the above-mentioned lens group 212, in which case a plurality of heating members 223 may be provided near other parts of the camera 21 that need heating or preheating, respectively. The application is not limited in this regard.

In other embodiments of the present application, the first coil 221 and the heating element 22 may be preset inside the camera 21 to be connected to the camera 21 as an integral structure when the camera 21 is assembled according to requirements, wherein the two may be separately disposed inside and outside the camera 21, which is not limited in the present application.

In the following, the structure of the heating element 223 is illustrated, and in some embodiments of the present application, since the volume of the camera 21 itself is small, if a metal body is used as the heating element 223 disposed in the camera 21, the size and thickness of the metal body are limited, and the heating effect is limited. In addition, the camera 21 is required to be waterproof and dustproof, and the thermal expansion coefficients of the metal body and the nonmetal member (plastic) are not uniform, so that it is difficult to achieve high waterproof and dustproof specifications. Thus, in some embodiments of the present application, the heating element 223 may be a resistive wire, the present application is not limited to the type of resistive wire, and the resistive wire is connected in series with the second coil 222.

In this case, the resistance wire may be disposed at a position to be heated inside or outside the camera 21 together with the second coil 222, and the second coil 222 may be connected in series with a plurality of resistance wires, and the resistance wires may be disposed at positions to be heated inside or outside the camera 21 separately. The application is not limited in this regard. The heating effect of the resistance wire of the application can be set by changing the parameters of the resistance wire. Compared with the metal body, the control mode is simple and easy to realize, the resistance wire is easy to wind inside and outside the camera 21, and the occupied space is small. Since the first coil 221 and the second coil 222 are coupled to transfer energy, the operating frequency required to ensure resonance between the two coils is relatively fixed during use.

In other embodiments of the present application, the heating member 223 may be a heating film, and the heating film 223 may be a transparent flexible film having a certain light transmittance. The transparent flexible film may be disposed on the surface of the lens (lens group 212) or on the edge of the lens, and the camera 21 can also monitor the image. The heating film 223 may be disposed inside the camera 21 or on the surface of the camera 21, which is not limited in the present application.

For ease of illustration, the subsequent heating element 223 is illustrated as a resistive wire. In the related art, the heating effect after the installation of the resistance wire can be determined by controlling the current through the system, but the control manner is single, and in some embodiments of the present application, preferably, as shown in fig. 12, the centers of the first coil 221 and the second coil 222 are on the same axis, and the two coils are parallel. The coupling distance between the second coil 222 and the first coil 221 is proportional to the energy transmission size. The closer the distance is, the greater the current generated at the first coil 221. In other embodiments of the application, the control of the heating effect of the resistive wire may also be achieved by controlling the current on the second coil 222 by the ratio of the number of turns between the first coil 221 and the second coil 222. Therefore, the heating effect control mode is more flexible.

In other embodiments of the present application, the heating assembly 22 may further include a temperature-controlled resistor 224 as shown in fig. 13, wherein the temperature-controlled resistor 224 is connected in series with the second coil 222 and the resistance wire to achieve intelligent heating, and the temperature-controlled resistor 224 may include a positive temperature coefficient resistor, a negative temperature coefficient resistor, a self-restoring fuse, and the like. The operating state of the second coil 222 may be indirectly known by monitoring the difference between the current value at the second coil 222 and a predetermined value. When the resistance wire can be controlled using a series positive temperature coefficient resistor. The positive temperature coefficient resistance is small at the beginning due to the positive temperature coefficient resistance, and the current on the loop is large. The heat generated on the resistance wire is the greatest. Over time, the positive temperature coefficient resistance value gradually increases, the loop current gradually decreases, and the heat generated on the resistance wire gradually decreases.

In this case, the resistance wire starts to heat at a high power at the start-up, and then the heating effect is reduced. In this way, when an electric current is generated in the second coil 222 to start, a rapid heating of the resistance wire can be achieved until the heating function is turned off. Thereby rapidly achieving a heating effect.

In other embodiments of the application, a series negative temperature coefficient resistor may also be used in series with the second coil 222 and the resistive wire. And due to the negative temperature coefficient resistor, low-power heating during starting is realized, and the heating power is gradually increased to the maximum value. In this case, the resistance wire can gradually increase the heating power, which helps to ensure the structural stability of the heated component in the camera 21, without damaging the internal damage of the heated component due to inconsistent internal thermal expansion coefficients, such as loosening of the components in the lens, slight displacement of the components, and influence on the service life of the components.

In other embodiments of the present application, a series delay type self-healing fuse may also be used in series with the second coil 222 and the resistive wire. The self-restoring fuse has the double functions of overcurrent and overheat protection and automatic restoration. When the working current is larger than the set value of the self-recovery fuse protection, the self-recovery fuse is disconnected to stop heating. The fixed heating is realized for a certain time (for example, 100 ms, 200 ms, 300 ms, etc.), and the time is not limited by the application.

The arrangement of the first coil 221, the second coil 222, and the resistance wire on the camera 21 is exemplified below. For example, in some embodiments of the present application, the camera module 2 may further include an insulating sleeve 225 as shown in fig. 14 (the insulating sleeve 225 is sufficient for insulation and can be fixed by cold shrinkage after being heated, which is within the scope of the present application), and the insulating sleeve 225 may be a thermoplastic sleeve. At this time, when the heating assembly 22 is disposed outside the camera 21, the first coil 221, the second coil 222, and the resistance wire may be located inside the thermoplastic sleeve and adhered outside the camera 21 by heating, and a plurality of resistance wires may be adhered at a position to be heated. In other embodiments of the present application, the first coil 221, the second coil 222 and the resistance wire may be adhered to the inner side of the camera 21 through thermoplastic sleeves, and the present application is not limited to the adhering position.

In this case, since the thermoplastic sleeve has the characteristics of high temperature shrinkage, softness, flame retardance, insulation, corrosion resistance, etc., the thermoplastic sleeve can be shrunk by heating (125 degrees) the thermoplastic sleeve by a heat gun without changing the internal structure of the camera 21, and the thermoplastic sleeve is sleeved outside the second coil 222 to be fixed on the camera 21 as shown in fig. 15 (which is a schematic sectional view in the A-A direction of fig. 14). The first coil 221 and the resistance wire can also be fixed outside the camera 21 by this method. By adopting the fixing mode, the installation mode is simple, and the imaging quality of the camera 21 is not affected on the premise of not changing the waterproof and dustproof structure of the existing camera 21. And the thermoplastic sleeve is not limited to the size of the camera 21, so that the heating function of the camera 21 with each size can be realized easily. In other embodiments of the present application, the first coil 221, the second coil 222, and the resistance wire may be fixed to the outside of the camera 21 by other means or a fixing structure.

In other embodiments of the application, as shown in fig. 16, the thermoplastic sleeve (insulating sleeve 225) may include a first sleeve 2251 and a second sleeve 2252 positioned within the first sleeve 2251, with the first coil 221 or heating assembly 22 positioned between the first sleeve 2251 and the second sleeve 2252. In this case, the following illustrates a manner of fixing the first coil 221, for example, as shown in fig. 17, the first coil 221 is fixed on the outer side of the camera 21, the second sleeve 2252 is heated to be closely attached to the outer wall of the camera 21, and the first sleeve 2251 is heated to adhere the first coil 221 to the second sleeve 2252, so as to fix the first coil 221. In this way, second sleeve 2252 isolates camera 21 from first coil 221, thereby preventing components within camera 21 from interfering with the magnetic field generated by first coil 221. The thermoplastic sleeve of the present application may also be adhered to the inside of the camera 21, which is not limited in this regard. In other embodiments of the present application, the second coil 222 and the resistance wire may be fixed in this manner, which is not limited by the present application.

In other embodiments of the present application, the first coil 221, the second coil 222 and the resistance wire may be wound on the outside of the camera 21 by an adhesive tape having similar properties to an insulating adhesive tape, or may be individually wound on the outside of the camera 21 after penetrating into the heat shrinkage bush. The application is not limited in this regard.

In summary, the heating device of the camera 21 is generally installed inside the camera 21, and the size and thickness of the heating device are limited due to the small size of the camera 21. And because of the different sizes of the cameras 21, heating devices with different versions and sizes are required to be matched with the cameras to meet the requirements. As can be seen from the above embodiments, the resistance wire of the present application may be mounted on the outside of the camera 21 or provided on the outer surface of the lens group 212. Realize the heating function of camera 21 on the basis that does not change current camera 21 waterproof dustproof construction, do not influence camera 21 imaging effect, all can install to different size structure cameras 21, realized the commonality of the different models of heating camera 21. Furthermore, in other embodiments of the present application, a shielded electromagnetic field region may be formed outside the camera 21, and the varying magnetic field may not leak, which may increase the receiving strength of the second coil 222.

When the camera 21 is used for the vehicle 100, the current on the first coil 221 needs to be supplied by the power chip 13, and in other embodiments of the present application, the first coil 221 may also be supplied by an external power source, and the power chip 13 of the original power source such as a motion camera, an outdoor monitor, etc. is used for supplying power. The application is not limited in this regard. In some embodiments of the present application, if the original power chip 13 in the vehicle electronic control unit 1 is used for supplying power, the cost of an external power supply is saved, and the power supply unit can be controlled by the vehicle electronic control unit 1, so that the power supply is more intelligent, and in addition, in order to meet the changing current requirement of the first coil 221, a power conversion module can also be connected in series before the first coil 221 to meet the current characteristic. In other embodiments of the present application, the power chip 13 may also generate a variable current, which is not limited by the present application.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A camera assembly, comprising:

a camera;

the first coil is arranged on the camera;

the second coil is arranged on the camera and used for receiving the magnetic field generated by the first coil and converting the magnetic field into current;

and the heating piece is electrically connected with the second coil and is used for receiving the current generated by the second coil and generating heat to heat the camera.

2. The camera head assembly of claim 1, wherein the camera head comprises:

a lens base provided with a first mounting cavity;

the lens group is positioned in the first mounting cavity;

the heating element is arranged between the lens group and the inner wall of the first mounting cavity, or is arranged on the outer wall of the first mounting cavity.

3. The camera head assembly of claim 1, wherein the camera head comprises:

the lens seat is provided with a first installation cavity and a second installation cavity communicated with the first installation cavity;

the lens group is positioned in the first mounting cavity;

the image sensor is positioned in the second mounting cavity and is used for receiving light rays from the lens group and performing photoelectric conversion;

4. A camera assembly according to claim 3, wherein the camera further comprises:

and the transmission chip is positioned in the second mounting cavity and is electrically connected with the image sensor, and the heating element is arranged between the transmission chip and the inner wall of the second mounting cavity or is arranged on the outer wall of the second mounting cavity and is close to the transmission chip.

5. The camera assembly of any of claims 1-4, further comprising:

at least one insulating sleeve in which at least one of the first coil, the second coil, and the heating element is wrapped; the insulating sleeve is arranged on the camera.

6. The camera head assembly of claim 5, wherein the camera head is nested within the insulating sleeve;

the insulating sleeve is a thermoplastic sleeve.

7. The camera head assembly of claim 1, wherein the heating element is one or both of a resistive wire and a heating film.

8. The camera assembly of claim 1, further comprising a temperature controlled resistor; the temperature control resistor is connected with the heating element in series.

9. A vehicle-mounted system, comprising: an electronic control unit and a camera assembly according to any one of claims 1 to 8, said camera assembly being electrically connected to said electronic control unit.

10. An in-vehicle system according to claim 9, wherein,

the electronic control unit includes:

the image processor is electrically connected with the camera and is used for receiving the electric signals from the camera, generating image data and obtaining the definition of the image data;

the microcontroller is electrically connected with the image processor and is used for sending out a control instruction if the definition is smaller than the definition threshold value;

and the power supply chip is electrically connected with the microcontroller and the first coil in the camera assembly and is used for supplying power to the first coil according to the control instruction.

11. A vehicle comprising a body and the in-vehicle system according to claim 9 or 10, the in-vehicle system being mounted on the body.