CN213152198U

CN213152198U - High-intensity low-illumination rapid visual sensing system

Info

Publication number: CN213152198U
Application number: CN202021437066.4U
Authority: CN
Inventors: 宋世能; 李久滔
Original assignee: Yin Chuang Technology Shanghai Co ltd
Current assignee: Yin Chuang Technology Shanghai Co ltd
Priority date: 2020-07-18
Filing date: 2020-07-18
Publication date: 2021-05-07
Anticipated expiration: 2030-07-18

Abstract

The utility model discloses a high-intensity low-illumination rapid visual sensing system, which comprises an image acquisition coding and transmission circuit, and acquires image video information; the image acquisition coding and transmission circuit is connected with an image decoding and transmission circuit, the image decoding and transmission circuit is respectively connected with the light source control and regulation circuit and the PC, and the light source control and regulation circuit is connected with the LED light source array; different sensing technologies have respective corresponding detection limits, and the sizes of equipment in different illumination environments, installation positions and equipment are greatly different. The integration of the sensing technology provides a comprehensive environment sensing means for safe driving and unmanned driving decision making, and meets the requirement of quick response.

Description

High-intensity low-illumination rapid visual sensing system

Technical Field

The utility model belongs to automotive electronics vision sensing field especially relates to quick vision sensing system of high strength low light level.

Background

With the rapid development of safety assistance and unmanned driving technologies, machine vision-dominated sensing technologies and environment sensing become inevitable, however, different sensing technologies have respective corresponding detection limitations, and the integration of the sensing technologies provides a comprehensive environment sensing means for safety driving and unmanned driving decisions, so that the machine vision sensing needs to have accurate calibration and installation requirements.

SUMMERY OF THE UTILITY MODEL

The utility model provides a high strength low light level quick vision sensing system, different sensing technology all have respective corresponding detection limitation, at different illuminance environment, mounted position, equipment size all has very big difference. The integration of the sensing technology provides a comprehensive environment sensing means for safe driving and unmanned driving decision making, and meets the requirement of quick response.

In order to solve the problem existing in the background art, the utility model adopts the following technical scheme: the high-intensity low-illumination rapid visual sensing system comprises an image acquisition coding and transmission circuit, and is used for acquiring image video information; the image acquisition coding and transmission circuit is connected with an image decoding and transmission circuit, the image decoding and transmission circuit is respectively connected with the light source control and regulation circuit and the PC, and the light source control and regulation circuit is connected with the LED light source array.

Preferably, the image acquisition coding and transmission circuit comprises an image acquisition device and a power supply module, the image acquisition device is provided with an interface circuit connected with the coding chip, the coding chip is connected with the Fakra connector, and the power supply module supplies power to the coding chip and the interface circuit.

Preferably, the image decoding and transmitting circuit comprises a decoding chip and a power supply module, the decoding chip is connected with a Fakra interface, the decoding chip is connected with a signal conversion module, and the signal conversion module is connected with a USB interface and transmits data with a PC.

Preferably, the light source control and regulation circuit comprises an MCU and a power supply module, wherein the MCU is connected with an LED light source drive circuit and a light source brightness control circuit, and further comprises a USB debugging interface, a LIN bus drive circuit, a CAN bus drive circuit and an RS232 bus drive circuit.

Preferably, the USB interface is a USB3.0 interface connected with a PC.

Preferably, the USB debugging interface is a USB2.0 interface.

Preferably, the image acquisition device comprises a crystal oscillator circuit and a built-in EEPROM.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the unique high-intensity infrared source control system and the infrared source control technology have the advantages that the visual sensing system is smaller in size, lower in power consumption, more excellent in heat treatment, comprehensive in detection sensing environment and long in range, and meanwhile, the detection limitation and the accurate calibration and installation requirements of different sensing technologies are met.

2. High integration, low power, excellent heat-treating capability;

3. provides a comprehensive environment sensing means for safe driving and unmanned decision making, has quick response, has a detection sensing environment with a response time of less than 10 milliseconds, is comprehensive and has a long range, and the detection range can reach 200 meters

Drawings

FIG. 1 is a system flow diagram of the present invention;

fig. 2 is a block diagram of an image capturing device according to the present invention;

fig. 3 is a circuit diagram of an interface according to the present invention;

FIG. 4 is a block diagram of an image coding chip according to the present invention;

fig. 5 is a power circuit diagram of the image acquisition coding and transmission circuit of the present invention;

fig. 6 is a circuit diagram of a Fakra interface of the connector of the present invention;

fig. 7 is a power circuit diagram of the image decoding processing and transmitting circuit of the present invention;

fig. 8 is a block diagram of a signal conversion chip U1 according to the present invention;

fig. 9 is a block diagram of a signal conversion chip U4 according to the present invention;

fig. 10 is a block diagram of the USB3.0 interface of the present invention;

fig. 11 is a block diagram of MCU light source control in the present invention;

fig. 12 is a circuit diagram of the LED light source driving circuit of the present invention;

fig. 13 is a LIN bus driver circuit diagram of the present invention;

fig. 14 is a CAN bus driving circuit diagram of the present invention;

fig. 15 is a circuit diagram of the RS232 bus driving circuit of the present invention;

fig. 16 is an interface circuit of the light source control regulator according to the present invention.

Fig. 17 is an image pickup device conversion circuit according to the present invention.

Detailed Description

Referring to the attached drawings, the high-intensity low-illumination rapid visual sensing system comprises an image acquisition coding and transmission circuit, and is used for acquiring image video information; the image acquisition coding and transmission circuit is connected with an image decoding and transmission circuit, the image decoding and transmission circuit is respectively connected with the light source control and regulation circuit and the PC, and the light source control and regulation circuit is connected with the LED light source array.

Preferably, the USB interface is a USB3.0 interface connected with a PC.

Preferably, the USB debugging interface is a USB2.0 interface.

The working principle of the system is that fig. 2 is an image acquisition device, a CMOS SENSOR receives a correct configuration through an IIC under the condition that a peripheral circuit works normally (a crystal oscillator starts oscillation and a voltage is normal), converts an optical signal into an electrical signal to be output, the electrical signal is converted into the electrical signal to be transmitted to an encoding chip through an interface circuit in fig. 3, the acquired video signal is transmitted to the encoding chip, the encoding chip receiving the video signal performs video signal encoding in a circuit in fig. 4, and after the peripheral circuit is configured, communication is established between a Serializer (encoding) and a Deserializer (decoding), and commands and image data are transmitted. Both command and image signals are transmitted from the OUT + port, while fig. 5 shows a power supply module for supplying power to the image acquisition encoding and transmission circuit. The encoded signal transmits command and image data through the Fakra connector in fig. 6, where the TVS tube is connected to the Fakra connector to prevent the transient current from being too large, thereby protecting the circuit. The Fakra connector is connected to the Fakra interface in fig. 7 for transmission of commands and video signals. The power supply module in fig. 8 is used for providing power for the image decoding processing and transmission circuit and the image acquisition coding transmission circuit, reducing the received video signal into parallel data in the decoding chip U1 in fig. 9, processing and converting the decoded video signal into a USB3.0 signal in the conversion chip U4 in fig. 10, transmitting the processed video signal to the PC through the USB3.0 interface in fig. 11, and synchronizing the video signal to the MCU in fig. 12 at the same time for communicating the vehicle body and related signals and controlling and regulating the light source, wherein after the LED light source driving circuit LED DRIVER IC in fig. 13 is powered on, the power supply is connected to the D pole of the MOS transistor through the resistor connected between the CSP and the CSN, the Gate pin is connected to the G pole of the MOS transistor as a control for the conduction and cut-off of the MOS transistor, the Boost pin, the SW, the Boost capacitor and the diode determine the start of the MOS transistor, the working behavior of the MOS tube is defined together with a Gate pin, a PWM pin determines the adjusting range of input pulse width, and a 100UH inductor and a capacitor form an LC low-pass filter for filtering the middle-high frequency part of PWM. An RC circuit with a 100UH inductor in parallel is used for filtering the switching frequency. The 100UH parallel diode is used for discharging the stored energy of the inductor when the MOS is cut off. The VLED pin is used for detecting the state of the solid-connected LED, and the chip is used for feedback and regulation. The resistance connected between the CSP and the CSN determines the driving current of the LED in the initial state, the register operation of the SPI interface determines the current in the actual working process, and the PWM determines the regulating range of the actual pulse width. The amplitude of the current can be adjusted in actual work, the pulse width can be adjusted, LED DRIVER has a plurality of channels, 1 channel can connect a plurality of LEDs, high integration is realized, under the condition of maintaining unchanged brightness, the pulse width is reduced by adjusting the current, the lighting time of the LED lamp is reduced, the LED has more cooling time, the heat treatment capacity is good, and the power consumption is low.

And the PC end judges whether the brightness requirement of the image is met or not according to the received image effect, and if the brightness requirement cannot be met, the light source control and adjustment circuit is required to adjust the brightness. The LIN bus, the CAN bus and the Uart bus of the MCU are connected with other ECUs, commands of the ECU CAN be transmitted to the MCU through the buses, and the MCU analyzes the commands and then works on a driving circuit of the LED through the PWM waveform and the SPI interface. Firstly, the MCU increases the pulse width, acquires image data, calculates whether the brightness meets the requirement, if the brightness can meet the requirement, finishes adjusting, if the brightness can not meet the requirement, continues increasing the pulse width, and repeats the process until the threshold value of the pulse width. If the requirements are still not met by adjusting the pulse width. The MCU adjusts the peak current of the pulse through the SPI interface, and the steps are repeated until the threshold value of the adjustable pulse peak current is reached.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. The high-intensity low-illumination rapid visual sensing system is characterized by comprising an image acquisition coding and transmission circuit, an image video information acquisition circuit and a visual information acquisition circuit, wherein the image acquisition coding and transmission circuit is used for acquiring image video information; the image acquisition coding and transmission circuit is connected with an image decoding and transmission circuit, the image decoding and transmission circuit is respectively connected with the light source control and regulation circuit and the PC, and the light source control and regulation circuit is connected with the LED light source array.

2. The high intensity low intensity fast vision sensing system of claim 1, wherein: the image acquisition coding and transmission circuit comprises an image acquisition device and a power supply module, the image acquisition device is provided with an interface circuit connected with a coding chip, the coding chip is connected with a Fakra connector, and the power supply module supplies power for the coding chip and the interface circuit.

3. The high intensity low intensity fast vision sensing system of claim 1, wherein: the image decoding and transmitting circuit comprises a decoding chip and a power supply module, wherein the decoding chip is connected with a Fakra interface, the decoding chip is connected with a signal conversion module, and the signal conversion module is connected with a USB interface and transmits data with a PC.

4. The high intensity low intensity fast vision sensing system of claim 1, wherein: the light source control and regulation circuit comprises an MCU (micro controller unit) and a power supply module, wherein the MCU is connected with an LED light source drive circuit and a light source brightness control circuit, and also comprises a USB (universal serial bus) debugging interface, a LIN bus drive circuit, a CAN bus drive circuit and an RS232 bus drive circuit.

5. A high intensity low light fast vision sensing system as defined in claim 3, wherein: the USB interface is a USB3.0 interface.

6. The high intensity low intensity fast vision sensing system of claim 4, wherein: the USB debugging interface is a USB2.0 interface.

7. The high intensity low intensity fast vision sensing system of claim 2, wherein: the image acquisition device comprises a crystal oscillator circuit and a built-in EEPROM.