Monitoring system with photoelectric sensor and monitoring method

Abstract

The invention discloses a monitoring system with a photoelectric sensor and a monitoring method thereof.The monitoring system comprises an optical signal receiving module, a photoelectric conversion module, a data processing module and an output control module, and the optical signal receiving module transmits received optical signals to the photoelectric conversion module; the photoelectric conversion module converts the optical signal into an electric signal, the electric signal is transmitted to the data processing module after being processed, the electric signal is converted into a digital signal through the data processing module, and the optical signal received by the optical signal receiving module changes along with the change of a measured physical quantity. The optical signal is converted into a digital signal, the digital signal is processed by the data processing module, the change rule of the measured physical quantity is displayed through a state change curve by the display device, and the monitoring system can be suitable for distance monitoring of high-precision equipment; and whether the appearance color of the product is qualified can be detected.

Description

technical field [0001] The invention relates to a sensor monitoring system applied in the field of automation, in particular to a monitoring system and a monitoring method with a photoelectric sensor. Background technique [0002] As a detection device, the sensor converts the measured physical quantity into an electrical signal, so as to realize the reprocessing of the obtained information through transmission, processing, storage, display, recording and control in the later stage. Taking the existing displacement sensor as an example, it detects the displacement by using the principle of cross-radiation of light, and obtains the displacement analog value, which can be used as a switch simply by using the analog value. For example, when the detected distance is close to the preset After the threshold range, the corresponding PLC device action will be controlled; for more complex applications, the analog quantity can play a role in monitoring statistics, for example, the ana...

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Problems solved by technology

[0003] However, there are also defects in the application of this analog quantity: first, what is read through the analog quantity is an intermediate quantity, and this intermediate quantity needs to be converted, oscilloscope and other means to indirectly obtain the corresponding state value indicating the distance; Or, neither the state value nor the intermediate value is an intuitive value, which cannot be further used for data analysis, which will affect the smooth progress of later data statistics and error analysis.

[0004] Furthermore, in the actual application environment, the existing displacement monitoring system only controls the switching value limit. When the color of the components is scattered, dust is generated, or the components are scratched on the work station and the appearance color is bad, it is very difficult to detect the aging of the optical fiber. Misjudgment will occur, resulting in reduced detection accuracy

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