Driving anti-collision radar device for automobile

Abstract

The invention relates to a driving anti-collision radar device for an automobile. The driving anti-collision radar device comprises an antenna array, a Butler matrix multi-beam feedback distribution / synthesizer, a millimeter wave receiving and transmitting assembly, a waveform generator, an intermediate-frequency amplification circuit, a signal processing circuit, a display and alarm module and a power supply module. The waveform generator generates modulation voltage, outputs the modulation voltage to the millimeter wave receiving and transmitting assembly, generates a transmitting signal, and outputs the transmitting signal to the Butler matrix multi-beam feedback distribution / synthesizer for beam forming; and the transmitting signal is radiated by the antenna array, reflection echoes are transmitted to the Butler matrix multi-beam feedback distribution / synthesizer by the antenna array for signal synthesis, an intermediate-frequency beat signal is output by down conversion, the intermediate-frequency amplification circuit amplifies the intermediate-frequency beat signal, and the intermediate-frequency beat signal is input to the signal processing circuit for sampling, analyzing, processing, displaying and prewarning. The device is high in beam switching speed, low in cost, high in reliability, large in search area, and strong in anti-jamming performance, and can be widely applied to the fields of various complex industrial fields and driving safety of automobiles.

Description

technical field [0001] The invention belongs to the technical field of radar communication and automobile electronics, in particular to an active anti-collision radar device for automobiles. Background technique [0002] With the development of the automobile industry, both manufacturers and consumers have begun to pay more and more attention to the safety of automobile driving. In traffic accident statistics, about 85% of automobile rear-end collisions are caused by the negligence of drivers. Therefore, how to control or avoid car collision has become a research hotspot, and car collision avoidance radar technology has been paid more and more attention by more and more people, and it is becoming an important technology to measure car safety performance. Compared with ultrasonic, infrared, laser and other automotive anti-collision radars, millimeter-wave automotive anti-collision radars have the characteristics of large bandwidth, high resolution, small component size, ligh...

AI Technical Summary

Problems solved by technology

[0004] First, single-beam detection technologies such as ultrasonic waves and lasers are used, and multiple sets of sensors and signal processing equipment are used to achieve multi-angle detection in front of the car, such as the Chinese patented multi-probe antenna car rearview anti-collision radar (patent No. 97237819.7), a A car anti-collision radar alarm device (patent No. 200620004241.4), a method and device for processing warning information in a car anti-collision laser radar system (patent No. 201010229331.4), but ultrasonic waves and lasers are greatly affected by weather conditions and cannot be used in large quantities. At the same time, the detection cost of multiple sets of sensors is greatly increased;

[0005] Second, microwave and millimeter wave single-beam detection is adopted, and the beam is narrow and the resolution is high. No. 200820213509.4), but because it is only a single-beam detection, the detection range of the automobile anti-collision radar is greatly limited. is not feasible;

[0006] Thirdly, microwave and millimeter wave frequency phased arrays are used to realize multi-beam scanning, and the direction of the beams changes due to different frequencies, such as the microwave car anti-collision driving radar device (patent No. 200320120396.0), but the narrow working frequency band is its inherent deficiency. Directly limit the detection range of beam scanning

[0007] To sum up, the current automotive anti-collision radar technology generally has defects such as large environmental impact, high cost, narrow detection range, and poor stability, which cannot guarantee the safety of the car during driving.

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