TOF three-dimensional distance measuring sensor

Abstract

The invention belongs to the technical field of sensors and especially relates to a TOF (Time of Flight) three-dimensional distance measuring sensor. The sensor includes a TOF processing chip composed of a distance calculating unit, a transmission driver and a receiving and processing circuit. The transmission driver is connected with an LED array light source. The receiving and processing circuit is connected with a CMOS light sensing chip. A transmitting lens is arranged in the transmitting direction of the LED array light source. A receiving lens is arranged in the receiving direction of the CMOS light sensing chip. The sensor provided by the invention is small in size, high in measurement precision, large in measurement distance; the actual measurement distance can reach 15 to 25 m. Besides, measurement results of the sensor provided by the invention are insusceptible to interference of vibration signals, sound signals and the like, so that product stability is improved substantially. Also, through effective control of frequency, power and divergence angle of the light source, the measurement results are insusceptible to influence of environmental light environments. The sensor provided by the invention can work stably in scenes of snowfield, desert and the like no matter in night or day, summer or winter. Therefore, requirements of automobile application scenes can be met.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a TOF three-dimensional ranging sensor. Background technique [0002] With the development of science and technology and the improvement of observation methods, people have deepened their research on optics. One of the signs is the accurate measurement of the speed of light propagation, and this data is used in various fields. Among them, using the propagation speed of light to measure the distance is an innovation in the distance measurement method, and this method is called Time of Flight (TOF) distance measurement method. [0003] The goal of the time-of-flight (TOF) ranging method is to measure real-time information, which requires a modulated light source and a high-precision receiver. Light, the distance of the target can be calculated by calculating the time from the light emission to the receiver to receive the reflected light. 10 -8 m / s, so this method has...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a TOF three-dimensional ranging sensor for the short measurement distance of the existing TOF three-dimensional ranging instrument, which is easily disturbed by ambient light and has low measurement accuracy, so as to solve the problem that the measuring distance is not far, The problem of low measurement accuracy

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