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Symmetrical transmitting-receiving integrated infrared thru-beam sensor

A technology of on-beam sensor and infrared on-beam, applied in the direction of optical device exploration, etc., can solve the problems of unfavorable occlusion, accurate calculation of occlusion time, transmitter consumption, large current, etc., to ensure effective distance and anti-interference ability, facilitate production and Effects of installation and debugging and reduction of power consumption

Inactive Publication Date: 2020-08-18
龚杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition to increasing the cost, this solution also brings two problems. 1: The receiving parts on both sides can not only receive the infrared signal on the opposite side, but also receive the direct or reflected signal from the transmitter on the same side, which is not conducive to correctly judging the occlusion 2: The transmitters on both sides will consume a large current, which is not easy to meet the low power consumption requirements of the infrared sensor for outdoor battery-powered application scenarios

Method used

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  • Symmetrical transmitting-receiving integrated infrared thru-beam sensor
  • Symmetrical transmitting-receiving integrated infrared thru-beam sensor
  • Symmetrical transmitting-receiving integrated infrared thru-beam sensor

Examples

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example

[0012] Example: The receiving and converging lenses ⑥ and ④ of the through-beam sensor are located on the same plane, the main optical axes are parallel, the infrared emitting element and the receiving element are located at the focal point of the lens, the A-side through-beam sensor and the B-side through-beam sensor are installed opposite each other, and the axis of rotation ⑧ Rotate the angle, adjust the inclination angle of the up, down, left and right directions, so that the main optical axes of the A-side transmitting lens and the B-side receiving lens are as close as possible, and the main optical axes of the A-side receiving lens and the B-side transmitting lens are as close as possible. After any side is powered on, it enters the receiving cycle first. If no pulse is received within 3 seconds, the transmitting cycle starts. A pulse is transmitted every T1 time, and 8 pulses form a group. The receiving cycle starts counting from receiving the pulse. If 8 pulses with a p...

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Abstract

The invention discloses a symmetrical transmitting-receiving integrated infrared thru-beam sensor. Two parts forming the thru-beam sensor are completely the same, transmitting and receiving are integrated, and pairing is not needed when the two parts are used in pairs; the two parts of the thru-beam sensor do not need to be connected, and thru-beam detection signals can be independently outputted.The thru-beam sensor comprises an infrared receiving part and an infrared transmitting part which are provided with converging lenses, a driving circuit for generating infrared pulses, a decoding circuit for processing received infrared signals, and an indicator lamp for shielding detection output and indicating the quality of the received signals. The thru-beam sensor alternately receives and transmits discontinuous pulse sequence coded infrared signals, can give consideration to correlation detection distance and detection response speed, and reduces emission power consumption at the same time. When in use, the two parts only need to be installed at two sides of a monitored channel, and the shielding detection signals can be simultaneously output at two sides by observing the signal quality indicating lamp to adjust the alignment direction, so the installation and debugging are simple and convenient, and the application is more flexible.

Description

technical field [0001] The invention relates to an infrared beam-to-beam sensor, in particular to an infrared occlusion detection sensor with two completely identical parts receiving and sending together and bilateral outputs. Background technique [0002] The infrared beam sensor includes a transmitter and a receiver. Usually, the infrared transmitter and the infrared receiver are fixed on both sides of the monitored road, aisle, entrance and exit, etc. When the infrared beam passing through the detection channel is blocked by passing pedestrians and vehicles , the receiving part detects the interruption of the infrared signal, and outputs a signal representing the occurrence of occlusion. Existing infrared through-beam sensors need to distinguish between the transmitting end and the receiving end, or between the master end and the slave end, and only one of the ends can output a occlusion detection signal. There are material differences or process differences in the produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V8/20
CPCG01V8/20
Inventor 龚杰
Owner 龚杰
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