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No-crosstalk supersonic ranging system hardware circuit

A distance measurement system and hardware circuit technology, which is applied in radio wave measurement system, measurement device, sound wave reradiation, etc., can solve the problem of wrong measurement results of transducers and obstacles, wrong movement of mobile robots, collision with obstacles, etc. problem, to achieve the effect of small aftershock, small blind area, and small distortion of measurement signal

Inactive Publication Date: 2018-03-06
王东玉
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Problems solved by technology

Ultrasonic crosstalk means that when multiple ultrasonic ranging sensors work at the same time, the signal received by one of the ultrasonic transducers is the echo emitted by other transducers or the echo after the ultrasonic touches an obstacle, not the ultrasonic emitted by itself. The echo, which leads to errors in the measurement results between the transducer and the obstacle, which will cause errors in the next action of the mobile robot, and it is very likely to hit the obstacle, resulting in serious consequences

Method used

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  • No-crosstalk supersonic ranging system hardware circuit
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Embodiment Construction

[0018] The present invention will be further described below in conjunction with drawings and embodiments.

[0019] Such as figure 1 , in the transmitter circuit and the detection circuit, the pulse signal sent by the signal source ear makes Q1 in the switching state, so that a changing current will be generated in the primary coil of the transformer, and the magnetic flux generated by the changing current will be in the secondary coil of the transformer A voltage is induced, and the secondary induced voltage is about 70 times that of the primary coil induced voltage (the ratio of the primary and secondary induced voltages is equal to the ratio of the coil turns). The high voltage of hundreds of volts generated by the secondary coil excites the transducer, causing the transducer to emit ultrasonic waves, and the electrical energy is converted into sound energy. The ultrasonic waves are reflected back by obstacles and act on the transducer. The capacitance of the transducer ch...

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Abstract

The invention discloses a hardware circuit of a crosstalk-free ultrasonic ranging system, which is suitable for the field of ultrasonic ranging. The circuit is composed of a transmitting circuit, a detecting circuit, a filtering circuit, a transmitting and receiving switch control circuit, a real-time data storage circuit and a historical data storage circuit. The circuit has long measurement distance, small blind area, small distortion of measurement signal, high precision, large dynamic range, stable echo signal, and small aftershock. The number of aftershocks can be adjusted according to the needs of theoretical research, which is convenient for encoding and transmitting signals. modulation.

Description

Technical field [0001] The invention relates to a hardware circuit of a non-crosstalk ultrasonic ranging system, which is suitable for the field of ultrasonic ranging. Background technique [0002] Robots have been more and more widely used in all walks of life in society such as industry, agriculture, national defense, scientific experiments, and service industries. Mobile robot is a kind of robot with self-planning, self-organizing and self-adaptive ability working in complex environment, and it is becoming a new focus and focus of robotics research. One of the most basic and most important manifestations of the intelligence of mobile robots is the ability to walk autonomously and avoid obstacles automatically. Theoretically, the behavior of a mobile robot can be pre-planned according to its environment, described by a series of motions, and eventually it can realize automatic walking and automatic obstacle avoidance. However, there are moving people or objects in the ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/08G01S7/523
CPCG01S15/08G01S7/523
Inventor 王东玉
Owner 王东玉
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