Ultrasonic sensor applicable to escalator

Abstract

The invention provides an ultrasonic sensor applicable to an escalator. The ultrasonic sensor applicable to the escalator comprises a transmitting drive module, a receiving module, a power supply module and a control processing module; the transmitting drive module is connected with a transmitter; the transmitting drive module drives the transmitter to send an ultrasonic signal; the receiving module is connected with a receiver; the receiver is used for receiving the ultrasonic signal sent by the transmitter; the power supply module is connected with the transmitting drive module and the receiving module; the control processing module is connected with the signal output end of the receiving module; and the control processing module is connected with the controller of the escalator. A high-frequency ultrasonic transmitter and a driving circuit for reducing ultrasonic aftershock are adopted in the ultrasonic sensor; the low blind area, the high precision and the high directivity of the ultrasonic sensor in short-distance detection are improved; therefore, the handrail of the escalator has a function of preventing hand clamping; and thus, the danger due to the fact that the hand of achild is involved in the access of a hand strap by mistake can be effectively prevented.

Description

Technical field [0001] The invention relates to a sensor, in particular to an ultrasonic sensor applied to an escalator. Background technique [0002] With the development of society, various large supermarkets, shopping malls and other public places are equipped with multiple escalators between the upper and lower floors to meet the needs of leisure and fashion shopping. However, the existing escalators generally lack the installation of anti-pinching devices at the entrance and exit of the handrail. Although adults can avoid this risk well, children lack this awareness of prevention, coupled with the negligence of adults to supervise children, causing such accidents to happen from time to time. [0003] The invention patent (patent number: 201710937404.7) discloses an anti-pinch device for escalators with sound and light control. It relates to the field of protective devices used in escalators or moving walks. It is installed at the entrance and exit of the bottom handrail of esc...

AI Technical Summary

Problems solved by technology

[0004] The structure of the anti-pinch device for escalators is relatively complicated, and it is not very convenient to implement. The best way is to implement it through sensor braking.

However, due to the special application environment and application occasions of escalators, there is currently no sensor specially used in escalator anti-pinch

Images