Light projection adjustment system for photoelectric sensor

A technology of photoelectric sensor and adjustment system, which is applied in the field of light projection adjustment system, can solve the problems such as the inability to automatically adjust the control voltage, achieve the effect of reducing cost and power consumption, reducing MCU resources, and simple implementation method

Active Publication Date: 2019-10-08
上海索迪龙自动化股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the control voltage provided by this method is constant, and the control voltage cannot be automatically adjusted according to actual needs.

Method used

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  • Light projection adjustment system for photoelectric sensor
  • Light projection adjustment system for photoelectric sensor
  • Light projection adjustment system for photoelectric sensor

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0041] Such as Image 6 As shown, the present invention provides a light projection adjustment system of a photoelectric sensor, and the system includes:

[0042] MCU (Microcontroller Unit) circuit, the MCU circuit outputs a PWM wave signal through its PWM port, and the timer of the MCU circuit generates a light projection timing signal Vm;

[0043] Here, the PWM wave signal can have a preset period, but the duty ratio is adjustable, and the amplitude is Vp, and the MCU circuit can output a signal with a preset period, a preset duty ratio, and an amplitude of Vp according to the demand. PWM signal;

[0044] A rectification and filter circuit connected to the MCU circuit, the rectification and filter circuit performs rectification and filter processing on the PWM wave signal output by the MCU circuit, and obtains a direct current equal to the voltage amplitu...

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Abstract

The invention provides a light projection adjustment system for a photoelectric sensor. The system provided by the invention comprises an MCU circuit, a rectification and filtering circuit, a power amplification driving circuit, a pulse width modulation circuit, a photoelectric conversion circuit and a light emitting diode. A PWM port built in the MCU circuit is used to output PWM waves with fixedperiod and adjustable duty cycle to control a light projection adjustment circuit to realize the adjustment of the amount of light projection. According to the invention, the implementation method ofthe system is simple; the system can automatically adjust the amount of light projection; MCU resources can be reduced, and the cost and power consumption of the system can be reduced.

Description

technical field [0001] The invention relates to a light projection adjustment system of a photoelectric sensor. Background technique [0002] In some applications of photoelectric switches, it is necessary to adjust the amount of light emitted to complete the most suitable detection. The existing methods of adjusting the amount of light emitted by photoelectric switches are as follows: [0003] (1) Use the analog potentiometer instead of the bias resistor, and change the size of the bias resistor by adjusting the size of the potentiometer to adjust the amount of light projected. This method is limited by the structure of the photoelectric switch, [0004] Difficult to adjust potentiometers. [0005] (2) Utilize the DA terminal of the MCU to output an analog signal, and perform power amplification to form a light projection control voltage capable of driving the light projection transistor. However, the control voltage provided by this method is constant, and the size of t...

Claims

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Application Information

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IPC IPC(8): H05B33/08H03K5/04H05B44/00
CPCH03K5/04H05B45/10Y02B20/30
Inventor 邓志才杨亚男陈坤速
Owner 上海索迪龙自动化股份有限公司
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