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Plug-in emitted pulse sensor

A pulse-emitting, plug-in technology, applied in the field of pulse-emitting plug-in sensors, can solve problems such as invalid functions

Inactive Publication Date: 2005-01-05
OMRON SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when noise pulses occur periodically and the timing of their occurrence coincides with the timing of receiving light, the function is almost ineffective.

Method used

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  • Plug-in emitted pulse sensor
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  • Plug-in emitted pulse sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] Below, refer to the attached Figure 1 A preferred embodiment of the pulse-emitting insertion type sensor to which the present invention is applied will be described in detail.

[0063] The circuit configuration of the throwing and receiving split type photoelectric sensor (the first embodiment) of the present invention is shown in figure 1 middle.

[0064] As shown in the figure, the circuit of the photoelectric sensor includes a light projecting device 1 and a light receiving device 2 . The light projecting device 1 includes: a pulse generator 11 that outputs a driving pulse for specifying light projection timing according to a prescribed cycle, and a driving circuit 12 that works with pulses output by the pulse generator 11 (in the figure, an emitter resistor 12a is used). The emitter grounded transistor) and the light emitting device 13 driven by the drive circuit (in the figure, a light emitting diode that emits light such as infrared rays or visible light is sho...

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Abstract

The present invention provides a plug-in emitted pulse sensor and the main technique thereof, measures for preventing error operating are formed effectivly even if noise pulses occur periodically and the timing of the noise pulses overlap with the timing of receiving lights. A converter for converting the received radiation pulses into electrical pulses is set in the receiving apparatus in a radiation pulse plug-in sensor which has a emitting apparatus for sending repeatedly radiation pulses and a receiving apparatus for receiving radiation pulses; an judgment component, by which it is judged , on the basis of a known waveform characteristic or characteristics of true electrical pulse, if a pulse which appears on the output line of the converter is a true electrical pulse caused by receiving the radiation pulse emitted from the emitting device or a false electrical pulse caused by noise; an component for outputing signals according to the result of the judgment of the judgment component.

Description

technical field [0001] The present invention relates to such as photoelectric sensors, ultrasonic sensors, microwave sensors, pulse transponders, etc. Transmitting pulse insertion sensors, especially when noise pulses occur periodically and the timing of their occurrence coincides with the timing of receiving light. A pulse-emitting insertion sensor that forms a countermeasure against misoperation. Background technique [0002] Conventionally, pulsed insertion sensors such as photoelectric sensors, ultrasonic sensors, microwave sensors, and transponders are known as sensors that detect the presence, distance, shape, etc. of an object in a non-contact manner. Here, the emission pulse is a general term for optical pulses, ultrasonic pulses, microwave pulses, pulsed electromagnetic waves, and the like. [0003] In the emission pulse insertion type sensor, there is a transmission side device (generally called a light projector or a wave transmitter) that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/44G01S7/493G01S7/527
CPCG01S7/493G01J1/44G01S7/527
Inventor 水原晋中村新中西弘明
Owner OMRON SHANGHAI