CN215526748U

CN215526748U - Automobile data recorder

Info

Publication number: CN215526748U
Application number: CN202121764571.4U
Authority: CN
Inventors: 肖凡
Original assignee: Shenzhen Brando Technology Co ltd
Current assignee: Shenzhen Brando Technology Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-01-14
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses a vehicle event data recorder which comprises a first camera and a host, wherein the first camera comprises a first camera sensor, the first camera sensor collects image signals to generate MIPI parallel digital signals, a mainboard is installed in the host, the mainboard comprises a main chip, the first camera further comprises a first signal conversion chip electrically connected with the first camera sensor, the mainboard further comprises a second signal conversion chip electrically connected with the first signal conversion chip, a storage module and a power module, the first signal conversion chip is used for converting the received MIPI parallel digital signals into LVDS serial digital signals and outputting the LVDS serial digital signals to the second signal conversion chip, and the second signal conversion chip is used for converting the LVDS serial digital signals into the MIPI parallel digital signals again and outputting the MIPI parallel digital signals to the main chip. Above-mentioned vehicle event data recorder can long distance transmission MIPI signal, avoids data loss, guarantees the image high definition effect, and camera and mainboard mounted position flexibility ratio are high simultaneously.

Description

Automobile data recorder

Technical Field

The utility model relates to a recorder, in particular to an automobile data recorder.

Background

Currently, the MIPI (mobile Industry Processor interface) interface standard becomes the main standard for image output of image sensors on mobile devices (such as mobile phones), and the transmission distance of the physical layers C-PHY and D-PHY of the MIPI, which are widely used at present, is short, and is only about 0.1 meter. Due to the wide application of the image sensor in the fields of medical electronics (such as endoscopes) and automotive electronics (such as reverse images), the communication distance of the occasions can reach 5 meters and is far greater than the communication distance in mobile equipment, so that the image sensor cannot be directly and simply adopted, and the short distance of video communication based on the MIPI protocol becomes a bottleneck problem of a camera with the MIPI protocol. The short video communication distance of the MIPI protocol also causes the need of configuration and storage in the camera, which is not only not favorable for compact size of the camera, but also favorable for reliable storage of data, and in industrial application, such as large-size liquid crystal display on a vehicle-mounted driving recorder host, the LDVS (Low-Voltage Differential Signaling) interface standard is still widely used as a mature interface standard, and the solution of the transmission of MIPI and LVDS video signals becomes a technical problem which needs to be solved urgently by technicians in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a vehicle event data recorder which can transmit high-definition MIPI digital signals in a long distance and is flexibly and flexibly installed.

The utility model is realized in such a way, and provides a vehicle event data recorder which comprises a first camera and a host, wherein the first camera comprises a first camera sensor, the first camera sensor collects image signals to generate MIPI parallel digital signals, a mainboard is installed in the host, the mainboard comprises a main chip, the first camera further comprises a first signal conversion chip electrically connected with the first camera sensor, the mainboard further comprises a second signal conversion chip electrically connected with the first signal conversion chip, a storage module and a power module, the first signal conversion chip is used for converting the received MIPI parallel digital signals into LVDS serial digital signals and outputting the LVDS serial digital signals to the second signal conversion chip, and the second signal conversion chip is used for converting the LVDS serial digital signals into MIPI parallel digital signals again and outputting the MIPI parallel digital signals to the main chip.

Furthermore, the main chip also comprises a sensor which is electrically connected with the second signal conversion chip and used for receiving and processing the MIPI parallel digital signals input by the second signal conversion chip.

The automobile data recorder further comprises a second camera, the second camera comprises a second camera sensor and a third signal conversion chip electrically connected with the second camera sensor, the second camera sensor collects image signals to generate MIPI parallel digital signals, the main chip further comprises an LVDS receiving end electrically connected with the third signal conversion chip, the third signal conversion chip is used for receiving the MIPI parallel digital signals generated by the second camera sensor and converting the MIPI parallel digital signals into LVDS serial digital signals, and the LVDS receiving end is used for receiving the LVDS serial digital signals input by the third signal conversion chip.

Further, the master chip also includes a memory for providing data caching for the sensors and the LVDS.

Furthermore, the main chip also comprises a clock circuit and a crystal oscillator circuit which are electrically connected and used for controlling the LVDS clock frequency and the MIPI clock frequency, a plurality of storage interfaces which are electrically connected with the storage module on the mainboard, and a power supply module which supplies power to the main chip.

Furthermore, the mainboard also comprises a Wi-Fi module electrically connected with the main chip and used for transmitting images to external equipment.

Compared with the prior art, because the MIPI interface can transmit high-definition images, therefore, the image effect is ensured, meanwhile, the transmission distance of LVDS serial digital signals is far greater than that of MIPI parallel digital signals, and better EMC electromagnetic shielding capacity is achieved, data cannot be lost even if long-distance transmission is carried out, the image effect cannot be lost, the advantages of the MIPI interface and the LVDS interface are fully utilized, respective defects are avoided, because the transmission distance is greatly increased, a camera of the automobile data recorder can only be provided with a necessary memory, a storage module (such as a TF memory card and the like) is not needed to be arranged, the separation of the camera and the storage module is achieved, recorded automobile data can be effectively protected, the installation range of a host is enlarged, the installation position is flexible and mobile, the internal space of the camera can be saved, and the camera is more compact.

Drawings

Fig. 1 is a schematic block diagram of a drive recorder according to an embodiment of the present invention.

Fig. 2 is a circuit schematic diagram of the second signal conversion chip of fig. 1.

Fig. 3 is a circuit schematic diagram of the LVDS receiving end of fig. 1.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1, a driving recorder according to an embodiment of the present invention includes a first camera 1, a second camera 2, and a host (not shown). The first camera 1 comprises a first camera sensor 10 and a first signal conversion chip 12, wherein the first camera sensor 10 collects image signals to generate MIPI parallel digital signals, the MIPI parallel digital signals are transmitted to the first signal conversion chip 12, and then the MIPI parallel digital signals are output to a host. The second camera 2 comprises a second camera sensor 20 and a third signal conversion chip 22, the second camera sensor 20 collects image signals to generate MIPI parallel digital signals, the MIPI parallel digital signals are transmitted to the third signal conversion chip 22, and then the MIPI parallel digital signals are output to a host. The host is internally provided with a mainboard 3, and the mainboard 3 comprises a main chip 30, a second signal conversion chip 32, a storage module 34, a Wi-Fi module 35 and a power supply module 36. The master chip 30 includes a sensor 301, an LVDS receiving terminal 302, a clock circuit 303, a crystal oscillator circuit 304, an SPI flash memory 305 storing a system program, a memory 307, and a power supply module 308.

Referring to fig. 2, the MIPI parallel digital signal output by the first camera sensor 10 is transmitted to the first signal conversion chip 12 and is converted into the LVDS serial digital signal by the first signal conversion chip 12, in this embodiment, the first signal conversion chip 12 adopts a THCV231 chip. The LVDS serial digital signal converted and outputted by the first signal conversion chip 12 is continuously outputted to the second signal conversion chip 32, and is converted into an MIPI parallel digital signal and outputted to the sensor 301 driven by the main chip 30 for analysis and processing, after being outputted to the sensor 301, data stored in the memory 307 is needed, and the sensor 301 converts the MIPI signal into image information after receiving the MIPI signal, and performs video stream conversion and compression. In this embodiment, the THCV236 chip is used as the second signal conversion chip 32. The clock circuit 303 and the crystal oscillator circuit 304 control the LVDS clock frequency and the MIPI clock frequency to adapt to different LVDS and MIPI data.

Because the MIPI interface can transmit high-definition images, the image effect is ensured, meanwhile, the transmission distance of LVDS serial digital signals is far longer than that of MIPI parallel digital signals, and has better EMC electromagnetic shielding capability, so that data can not be lost in long-distance transmission, the image effect can not be lost, the advantages of the MIPI interface and the LVDS interface are fully utilized, and the respective defects are avoided, because the transmission distance is greatly increased, the first camera 1 of the automobile data recorder can only be provided with necessary internal memory without arranging a storage module (such as a TF memory card and the like), the camera 1 is separated from the storage module 34, therefore, recorded driving data can be protected more effectively, the installation range of a host (in which the main board 3 is installed) is enlarged, the installation position is flexible and mobile, the internal space of the first camera 1 can be saved, and the first camera 1 is more compact.

Considering that there are still a large number of devices using LVDS interface in the industry, such as large-sized liquid crystal screen (e.g. 7 inches or more), it is still necessary to provide compatibility adaptation for these external devices. Referring to fig. 3, in this embodiment, the MIPI parallel digital signal output by the second camera sensor 20 of the second camera 2 is transmitted into the third signal conversion chip 22, and is converted into an LVDS serial digital signal and then transmitted to the LVDS receiving terminal 302 on the main chip 30, where the LVDS receiving terminal 302 is a module embedded in the main chip 30, the memory 307 caches data, and all video recording files are stored in the storage module 34 (which may be a TF memory card) or wirelessly transmitted to an external device by the Wi-Fi module 35, and in this embodiment, the third signal conversion chip 22 also adopts a THCV231 chip.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a vehicle event data recorder, includes first camera and host computer, first camera includes first camera sensor, first camera sensor gathers image signal and generates the parallel digital signal of MIPI, install the mainboard in the host computer, the mainboard includes main chip, its characterized in that: the first camera further comprises a first signal conversion chip electrically connected with the first camera sensor, the mainboard further comprises a second signal conversion chip electrically connected with the first signal conversion chip, a storage module and a power module, the first signal conversion chip is used for converting the received MIPI parallel digital signals into LVDS serial digital signals and outputting the LVDS serial digital signals to the second signal conversion chip, and the second signal conversion chip is used for converting the LVDS serial digital signals into MIPI parallel digital signals again and outputting the MIPI parallel digital signals to the main chip.

2. The tachograph of claim 1, wherein: the main chip also comprises a sensor which is electrically connected with the second signal conversion chip and is used for receiving and processing the MIPI parallel digital signals input by the second signal conversion chip.

3. The tachograph of claim 2, wherein: the automobile data recorder further comprises a second camera, the second camera comprises a second camera sensor and a third signal conversion chip electrically connected with the second camera sensor, the second camera sensor collects image signals to generate MIPI parallel digital signals, the main chip further comprises an LVDS receiving end electrically connected with the third signal conversion chip, the third signal conversion chip is used for receiving the MIPI parallel digital signals generated by the second camera sensor and converting the MIPI parallel digital signals into LVDS serial digital signals, and the LVDS receiving end is used for receiving the LVDS serial digital signals input by the third signal conversion chip.

4. The tachograph of claim 3, wherein: the main chip also comprises a memory for providing data cache for the sensor and the LVDS.

5. The tachograph of claim 4, wherein: the main chip further comprises a clock circuit and a crystal oscillator circuit which are electrically connected and used for controlling LVDS clock frequency and MIPI clock frequency, a plurality of storage interfaces electrically connected with the storage module on the mainboard, and a power supply module for supplying power to the main chip.

6. The tachograph of claim 1, wherein: the mainboard further comprises a Wi-Fi module electrically connected with the main chip and used for transmitting images to external equipment.