CN208506826U - A kind of drive recorder that can be recorded from SD to full HD analog video - Google Patents

Abstract

The drive recorder from SD to full HD analog video can be recorded the utility model discloses one kind, which is characterized in that vision signal is inputted by 75 Ω coaxial lines, and resolution ratio can be from the video of NTSC/PAL until the full HD video of FHD.The video transmitted using coaxial line, cheap connector and connecting line are not used only, and camera shooting head end and recording end can be apart from very remote, it farthest can be more than that the design of 500m the utility model is highly convenient for standardizing, can it is very convenient replacement camera part solution, different camera vendors even is replaced, but does not need to do any change in recording end.To reduce the certification cost of the updating and upgrading of a product.

Description

Driving recorder capable of recording analog video from standard definition to full high definition

Technical Field

The utility model belongs to a can record from the clear driving recorder of the clear analog video of full altitude of mark.

Background

In the conventional tachograph design, the image Sensor (CMOS Sensor) is very close to the main chip of the tachograph, and there is usually no way to exceed 20 cm. This limits the product structure of the drive recorder and the installation form of this product, for example, it can be installed only in the middle-upper portion of the front windshield by being gathered together in its entirety. Once the image sensor and video end can be pulled apart a relatively large distance, high definition video is transmitted over long distances, and inexpensive connectors and connecting wires are also used. This makes the car-recorder product flexible in its arrangement in the car, and makes the suppliers in the factory selection system have many more possibilities.

Disclosure of Invention

The utility model aims to solve the technical problem that a can record from the clear simulation video's of mark driving recorder to full high-definition is provided.

The utility model provides a technical scheme as follows that above-mentioned technical problem took:

a driving recorder capable of recording analog video from standard definition to full high definition is characterized in that video signals are input through a 75 omega coaxial line, and the resolution can be from NTSC/PAL video to full high definition video of FHD. The video transmitted by the coaxial line not only adopts a cheap connector and a connecting line, but also has a camera head end and a recording end which can be far away and can exceed 500m farthest.

Preferably, the main components of the driving recorder capable of recording the analog video from standard definition to full high definition comprise:

STK4580L, which is a main control chip of the automobile data recorder, adopts BGA184 pin package, and embeds 32M byte DDR 2;

TP2825, which is a decoder for various analog video signals, can decode signals of various standards from CVBS to FHD;

WT51F108, a single-chip microcomputer of 1T 8051 core that MSOP10 capsulates, very small volume and stand-by power consumption;

DA380，G-Sensor；

ISL85410, a step-down DC-DC, that generates the main power rail of the system from the input ACC and B +;

EUP3508, integrated MOS switch.

The utility model discloses after having taken above-mentioned scheme, this design is convenient for standardize very much, can change the solution of camera part very conveniently, changes different camera suppliers even, but does not need to do any change at the video recording end. Thereby reducing the authentication cost of upgrading and updating products. The cameras of the NTSC and PAL systems are already standard components for automotive applications, are available from a number of suppliers, are very easy to obtain, do not require re-authentication, are cheap but are not high enough in definition. The HD and FHD cameras adopt the standard of simulating high-definition video and transmit the video to a video recording end. Currently, there are several solutions worldwide for analog high definition, but there is no fundamental difference in principle, but there are some differences in the frequency of the color carrier. The RX end designed on the driving recorder can be compatible with all the existing analog high-definition standards at present, and can automatically identify and adapt to cameras adopting different standards. Cameras, including both NTSC and PAL, may be automatically identified and processed, and then record the received video.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The present invention will be described in detail with reference to the accompanying drawings so that the above advantages of the present invention can be more clearly understood. Wherein,

fig. 1 is the structure schematic diagram of the driving recorder of the utility model which can record the analog video from standard definition to full high definition.

Detailed Description

The following detailed description will be made with reference to the accompanying drawings and examples, so as to solve the technical problems by applying technical means to the present invention, and to fully understand and implement the technical effects of the present invention. It should be noted that, as long as no conflict is formed, the embodiments and the features in the embodiments of the present invention may be combined with each other, and the technical solutions formed are all within the scope of the present invention.

A driving recorder capable of recording analog video from standard definition to full high definition is characterized in that video signals are input through a 75 omega coaxial line, and the resolution can be from NTSC/PAL video to full high definition video of FHD. The video transmitted by the coaxial line not only adopts a cheap connector and a connecting line, but also has a camera head end and a recording end which can be far away and can exceed 500m farthest.

Preferably, the main components of the driving recorder capable of recording the analog video from standard definition to full high definition comprise:

STK4580L, which is a main control chip of the automobile data recorder, adopts BGA184 pin package, and embeds 32M byte DDR 2;

TP2825, which is a decoder for various analog video signals, can decode signals of various standards from CVBS to FHD;

WT51F108, a single-chip microcomputer of 1T 8051 core that MSOP10 capsulates, very small volume and stand-by power consumption;

DA380，G-Sensor；

ISL85410, a step-down DC-DC, that generates the main power rail of the system from the input ACC and B +;

EUP3508, integrated MOS switch.

The utility model discloses after having taken above-mentioned scheme, this design is convenient for standardize very much, can change the solution of camera part very conveniently, changes different camera suppliers even, but does not need to do any change at the video recording end. Thereby reducing the authentication cost of upgrading and updating products. The cameras of the NTSC and PAL systems are already standard components for automotive applications, are available from a number of suppliers, are very easy to obtain, do not require re-authentication, are cheap but are not high enough in definition. The HD and FHD cameras adopt the standard of simulating high-definition video and transmit the video to a video recording end. Currently, there are several solutions worldwide for analog high definition, but there is no fundamental difference in principle, but there are some differences in the frequency of the color carrier. The RX end designed on the driving recorder can be compatible with all the existing analog high-definition standards at present, and can automatically identify and adapt to cameras adopting different standards. Cameras, including both NTSC and PAL, may be automatically identified and processed, and then record the received video.

Furthermore, 1, the temperature of the environment of use to which the design can be adapted: -40 ℃ to 105 ℃; particularly, the power supply structure without electrolytic capacitor is adopted, so that the starting under low temperature environment is easy to meet. The high temperature resistance is realized by improving the working efficiency of the device and selecting the device capable of resisting the high temperature.

2. Acceptable supply voltage range: DC 6V-40V, so that the power supply can be applied to automobiles with 12V power supply systems and 24V power supply systems; the automobile air conditioner is suitable for most automobiles;

3. the standby current is less than 0.2mA, which is realized under the conditions of simple circuit and low cost. In the standby state, the RTC of the main chip is alive; the small MCU is in a sleep state but can be awakened by I/O;

4. the main rail of this design uses 5V, although the overall power supply is somewhat less efficient (compared to a 3.6V main rail); however, when the super capacitor is used as a standby power supply of a low-voltage end, a relatively long power supply time (under the condition that both ACC and B + are abnormally powered off) can be obtained by using a relatively small capacity of the super capacitor.

5. The ACC is used as a main high-voltage power supply, and the B + power supply is used as a backup power supply of a high-voltage end; the super capacitor is used as a backup power supply of the main power rail. The design of the double backup power supply (high-voltage end and low-voltage end) can meet various harsh abnormal conditions of the power supply. It is important to ensure the security of the recorded data.

6. The whole circuit design adopts a design without electrolytic capacitance, so that the circuit has excellent low-temperature starting performance. The passive elements of the system are the most temperature-resistant, especially the capacitors with electrolyte, including aluminum electrolytic capacitors and tantalum electrolytic capacitors.

7. The input video hardware interface is a 75 omega coaxial line, and videos in various analog formats can be input; for the video with analog high definition, the method can be compatible with different time sequence standards, and different encoding standards of analog high definition can also be automatically adapted.

Note: in the resolution/refresh rate column, the representation with i is an interlaced signal; the others are progressive signals.

8. Data compression format: h.264, the compression format has higher compression ratio, and can occupy smaller memory space, thereby prolonging the service life of the data card. Video in this format is not suitable for frame-by-frame playback;

9. recording resolution and frame rate, determined in this design following the incoming signal; the resolution and frame rate of the currently input analog video are automatically set according to the current signal;

10. the video display device can be synchronously output when recording or previewing. For far-distance equipment, the output signal format can be a standard CVBS signal or a 960H format signal through an analog video output interface. For the devices in the same device, the digital interface BT656 can output digital video, and the highest resolution can be achieved: 960 x 540/30 Hz;

11. the analog video output is designed with a protection circuit, which can prevent VCC and B + from being mistakenly connected to a video output pin, thereby causing the damage of a main chip;

12. a mono analog audio Line Out;

13. a microphone amplifying circuit is embedded in the main chip, so that the main chip can be directly connected with a microphone of an electret; and the design of the digital microphone is compatible, and the digital microphone can be flexibly selected. The digital microphone has better recording effect; whether analog or digital, the microphone may be a relatively distant location, e.g., 1-2 meters away, from the main chip. The arrangement is very convenient;

14. the detection of the input states of the two groups of high-voltage power supplies, namely ACC and B +, is particularly carried out by using one ADC input pin of a small MCU; therefore, the pin resource of the MCU is greatly saved, and two I/O type pins are occupied by the common design;

15. this design does not have the capability of parking monitoring because the G-Sensor is mounted on one end of the main chip; once in the standby state, the power supply at one end of the main chip is completely cut off. In order to have the parking monitoring function, the G-Sensor and peripheral circuits thereof need to be moved to the end of the small MCU, and the normal electricity is kept;

16. a UART communication interface is designed in an external interface, the UART is connected to the main chip and is subjected to level expansion through an MOS (metal oxide semiconductor) tube; whether the connected communication devices adopt a level of 3.3V, a level of 5V, or even a level of 12V; this design is compatible. The communication processing of the UART is also completed by the main chip; through the UART serial communication interface, for example, a central control multimedia system can carry out standard time service on a driving recorder; a man-machine interface can be realized through a UART interface. And GPS coordinate information can be acquired from the multimedia central control navigation machine and then recorded in a file.

17. The integrated MOS switch is adopted, and can be directly driven by the I/O of the MCU, so that a mechanism for preventing the output voltage from flowing backwards and a measure for discharging the load are provided. By adopting the mode, not only the performance is excellent, but also the circuit is extremely simple; a relatively small volume design can be achieved.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (2)

1. A driving recorder capable of recording analog video from standard definition to full high definition is characterized in that video signals are input through a 75 omega coaxial line, the resolution can be from NTSC/PAL video to FHD full high definition video, coaxial line transmission video is adopted, not only cheap connectors and connecting lines are adopted, but also the camera head end and the recording end can be far away and can be more than 500m farthest.

2. The tachograph for recording analog video from standard definition to full high definition according to claim 1, wherein the tachograph comprises:

STK4580L, which is a main control chip of the automobile data recorder, adopts BGA184 pin package, and embeds 32M byte DDR 2;

TP2825, which is a decoder for various analog video signals, can decode signals of various standards from CVBS to FHD;

WT51F108, a single-chip microcomputer of 1T 8051 core that MSOP10 capsulates, very small volume and stand-by power consumption;

DA380，G-Sensor；

ISL85410, a step-down DC-DC, that generates the main power rail of the system from the input ACC and B +;

EUP3508, integrated MOS switch.