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Analog-to-digital conversion module in gas concentration detection system of painting workshop

A gas concentration detection and analog-to-digital conversion technology, which is applied in the field of shoe processing, can solve problems such as affecting detection accuracy and low precision, and achieve the effects of low cost, guaranteed conversion accuracy, and fewer components.

Inactive Publication Date: 2018-02-06
刘应华
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  • Claims
  • Application Information

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Problems solved by technology

The analog-to-digital conversion module in the gas concentration detection system in the existing paint spraying workshop is directly implemented by the analog-to-digital converter, which has low precision in application, which will affect the accuracy of detection

Method used

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  • Analog-to-digital conversion module in gas concentration detection system of painting workshop

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Embodiment

[0013] Such as figure 1 As shown, the analog-to-digital conversion module in the gas concentration detection system in the painting workshop includes a signal input line, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, and a second capacitor C2 , a transient voltage suppression diode D1, a voltage-to-frequency converter and a signal output circuit, wherein the voltage-to-frequency converter uses an LM331 chip, and its eighth pin is connected to a power supply VCC. Both ends of the first resistor R1 are respectively connected to the signal input line and the seventh pin of the voltage-frequency converter, one end of the first capacitor C1 is connected to the line between the first resistor R1 and the seventh pin of the voltage-frequency converter, and the other end grounded. One end of the transient voltage suppression diode D1 is connected to the seventh pin of the voltage-to-frequency converter, and the other end is...

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Abstract

The invention discloses an analog-to-digital conversion module in a gas concentration detection system in a painting workshop, comprising a signal input circuit, a first resistor, a fourth resistor, a first capacitor, a transient voltage suppression diode, a voltage-frequency converter and a signal output circuit, wherein , the voltage-to-frequency converter adopts the LM331 chip, and its eighth pin is connected to a power supply. Both ends of the first resistor are respectively connected to the signal input line and the seventh pin of the voltage-to-frequency converter, one end of the first capacitor is connected to the line between the first resistor and the seventh pin of the voltage-to-frequency converter, and the other end of the first capacitor is grounded. One end of the transient voltage suppression diode is connected to the seventh pin of the voltage-to-frequency converter, and the other end is grounded. Both ends of the fourth resistor are respectively connected to the third pin of the voltage-to-frequency converter and the signal output line. When the invention is applied, the analog / digital conversion of the sensor detection signal can be realized, and the conversion accuracy of the detection signal conversion can be guaranteed.

Description

technical field [0001] The invention relates to shoe processing technology, in particular to an analog-to-digital conversion module in a gas concentration detection system in a paint spraying workshop. Background technique [0002] With the development of society and the improvement of people's living standards, people pay more and more attention to the working environment. In the processing and production of shoes, the environment of the paint shop is poor, and people have also adopted a series of optimization measures to improve the construction environment of the paint shop. In order to facilitate the detection of gas concentration in the painting workshop, a gas concentration detection system has been designed, which includes a sensor, a DC regulated power supply, an analog-to-digital conversion circuit and a digital display circuit. When the gas concentration detection system is applied, it is powered by a DC regulated power supply Powering the entire system, the senso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/12G01N33/00
CPCH03M1/12G01N33/0004
Inventor 刘应华
Owner 刘应华
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