Electronic checking system for subway passenger information

Abstract

The invention relates to an electronic checking system for subway passenger information. The checking system comprises an infrared sensor, a field monitoring terminal and a master monitoring center which are connected in sequence, wherein a front-end information processing circuit, a double cascade triode data processing circuit and a data output circuit which are connected in sequence are arranged between the infrared sensor and the field monitoring terminal. According to the electronic checking system for the subway passenger information, the front-end information processing circuit can receive external information collected by the sensor, threshold judgment and hierarchical filtering processing are carried out on external information, and collected signal data are preliminarily processed. According to the double-cascade triode data processing circuit, the amplification function of the double-cascade triode is utilized to amplify the data, and the subsequent processing capacity of the integrating circuit is improved. The data output circuit can complete signal voltage stabilization and anti-interference processing, so signal storage time is shortened, and the purity and the utilization rate of signals are improved.

Description

technical field [0001] This application relates to the field of subway information and information inspection systems, in particular to an electronic inspection system for subway passenger information. Background technique [0002] With the gradual improvement of the national urban level, urban rail transit has developed rapidly. The subway has become one of the necessary rail transit constructions in cities with rapid economic development, and it is also one of the tools often chosen by people for travel. Subway stations have become crowded places, but also places where dangers and diseases spread. [0003] The electronic inspection system for subway passenger information in the prior art has the following problems: 1. The body temperature recognition accuracy and speed of the existing inspection system are low; 2. The driving force of the existing inspection system is weak, and the output accuracy is low; 3 .The existing nuclear inspection system has weak anti-interferen...

AI Technical Summary

Problems solved by technology

[0003] The electronic inspection system for subway passenger information in the prior art has the following problems: 1. The body temperature recognition accuracy and speed of the existing inspection system are low; 2. The driving force of the existing inspection system is weak, and the output accuracy is low; 3 .The existing nuclear inspection system has weak anti-interference ability

[0004] like figure 1 As shown, it is an information processing circuit in the prior art. The circuit adopts a multi-channel signal acquisition method. Three amplifiers TL072 form a two-stage amplification. The amplification factor can be completed by adjusting the resistance value of the resistor R10, which improves the practical range of the overall circuit. However, the entire information processing circuit lacks a high-performance filter circuit, and its anti-interference ability is weak. At the same time, it adopts the design of amplifiers, resistors, capacitors and other passive components, which has poor driving ability and slow processing speed.

[0005] like figure 2 Shown is the schematic diagram of the prior art amplification circuit. The circuit adopts two-stage amplification, and uses the closed-loop effect of the amplifier to realize signal transmission and amplification. The circuit structure is simple and the cost is low. However, due to the excessive use of amplifier chips, it will The driving ability of the circuit will be reduced, and signal distortion will occur in severe cases

[0006] like image 3 As shown, the filter circuit in the prior art adopts a two-stage low-pass filter design, which can ensure that low-frequency signals can pass through smoothly, and has a wide range of applications. However, the bandwidth of the filter is determined by the values ​​​​of the resistors and capacitors around the amplifier. It is difficult to achieve a large frequency bandwidth, and the filtering effect for low frequency clutter signals is poor, and the anti-interference ability is weak

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