Signal detecting device for automatic door control system

Abstract

The invention relates to a signal detecting device used in a control system of an automatic door, comprising a waveguide body, a coupling element extending into the waveguide body, a filtering element, an antenna connected with the waveguide body, a shorting plate and an oscillator and a mixer which are arranged in the waveguide body, wherein the waveguide body is provided inside with a waveguidecavity which is a cube, the oscillator and the mixer are flexibly arranged on the right side wall and the left side wall of the waveguide body respectively. The front ends of the filtering element andthe coupling element are positioned in the waveguide cavity and respectively on the top wall and the bottom wall of the waveguide cavity. The invention adopts a millimeter wave element and makes thestructure of the oscillator, the mixer, the coupling element and the filtering element inside the waveguide cavity more compact by changing the structure of the waveguide cavity. With the reduced volume,the depths of the oscillator and the mixer in the waveguide cavity can be adjusted by tube supports in threaded connection, the frequency and power of the oscillator can also be adjusted, and theeffi ciency and the receiving sensitivity of the mixer are improved.

Description

technical field [0001] The invention relates to a signal detection device used in an automatic door control system. Background technique [0002] At present, most of the signal detection devices used in the automatic door control system adopt the following two technical solutions: the first one is an infrared detector, which uses infrared radiation characteristics to obtain target information. Regardless of whether the person moves or not, as long as it is within the scanning range of the infrared detector, it will sense the target (human body) information, thereby generating a trigger signal to open the automatic door. The disadvantage of this technical solution is that the response speed of infrared detection is relatively slow, and it is suitable for places where people with slow movements come in and out, and this kind of infrared detection is greatly affected by the environment, such as temperature, humidity, smoke, dust, etc., long-term use will cause Misoperation or ...

AI Technical Summary

Problems solved by technology

The disadvantage of this component is that the waveguide between the mixing tube and the oscillator in the component needs a certain length to meet the condition of no direct coupling, and the volume cannot be reduced; the oscillator is fixedly connected in the waveguide cavity, and its frequency needs another Adjustable screw tuning, complex structure, inconvenient debugging; and due to complex structure, too many adjustable parts, it is difficult to meet the requirements of higher frequency bands; the existing detectors use microwaves with working frequency bands of 9.3GHz and 24.125GHz

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