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Light projection adjustment system for photoelectric sensors

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: 2020-11-13
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 sensors
  • Light projection adjustment system for photoelectric sensors
  • Light projection adjustment system for photoelectric sensors

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Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0040] like Figure 6 As shown, the present invention provides a light projection adjustment system of a photoelectric sensor, and the system includes:

[0041] 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;

[0042] 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;

[0043] 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 amplitude...

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PUM

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Abstract

The object of the present invention is to provide a light projection adjustment system of a photoelectric sensor. The present invention includes an MCU circuit, a rectification and filter circuit, a power amplifier drive circuit, a pulse width modulation circuit, a photoelectric conversion circuit and a light-emitting diode. The PWM port outputs a PWM wave with a fixed period and an adjustable duty cycle to control the light projection adjustment circuit, thereby realizing the adjustment of the light projection amount. The realization method of the present invention is simple, can automatically adjust the amount of light projection, can reduce MCU resources, and reduce system cost and power consumption.

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, and it is difficult to adjust the potentiometer. [0004] (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 o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B45/325H05B45/10H03K5/04H05B44/00
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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