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Data converter of atmosphere dust monitoring signal

A technology for monitoring signals and conversion devices, which is applied in measuring devices, signal transmission systems, suspensions and porous material analysis, etc. It can solve the problems of unclear location of received signals and inaccurate received signals. Analyze and avoid the effect of frequency signal interference

Active Publication Date: 2019-04-16
河南鑫安利职业健康科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide an atmospheric dust monitoring signal data conversion device, which has the characteristics of ingenious conception and humanized design, and effectively solves the problem that the signal received by the monitoring center server is not accurate enough and unclear. The problem with the specific location of the received signal

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  • Data converter of atmosphere dust monitoring signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, an atmospheric dust monitoring signal data conversion device, including a dust concentration sensor, a GPS positioning module, a GPRS communication module, and a monitoring center server, the coal mine atmospheric dust concentration information collected by the dust concentration sensor and the dust concentration sensor positioned by the GPS positioning module The location information is connected to the GPRS communication module through the serial port (the GSM+GPRS+GPS module of the model SKC111 with integrated positioning and communication can be selected), and the GPRS communication module sends it to the monitoring center server through the GPRS network, and the monitoring center server can clearly receive the information The specific location of the coal mine is more conducive to the use of database software to analyze the atmospheric dust concentration information of a certain area of ​​the coal mine, provide a basis for dust reduction, and reduce the...

Embodiment 2

[0016]Embodiment 2. On the basis of Embodiment 1, the frequency resonant circuit receives a dust concentration sensor X1 modeled as GCG1000 (which uses the principle of light scattering to detect the dust mass concentration of the coal mine underground air, and the measurement error is ≤ ± 10%) RS485 interface The output 200-1000Hz frequency signal passes through the band-pass filter composed of capacitor C1, capacitor C2, inductor L1, inductor L2, inductor L3, and capacitor C3 to filter out different frequency interference, and then enters the adjustable parallel resonance circuit with transistor Q1 as the core Resonate with a certain frequency signal in the 200-1000Hz frequency signal, where the resonant frequency is the impedance of the 200-1000Hz frequency signal generated by the matching network composed of inductor L4, inductor L5, variable capacitor CP1-variable capacitor CP3 The frequency of resonance generated by the parallel resonance circuit composed of capacitor C6 ...

Embodiment 3

[0017] Embodiment 3, on the basis of Embodiment 2, the voltage regulation circuit obtains the 2V-6V voltage signal output by the frequency-voltage conversion circuit without attenuation through the impedance matching circuit composed of the inductor L9, the inductor L10, the capacitor C13, and the capacitor C14. After that, the amplifier composed of operational amplifier AR1, resistor R10-resistor R12 is amplified in the same phase ratio, and the amplified signal passes through the diode D1 to isolate the interference signal below 3V, and the diode D2 to isolate the interference signal above 15V. The resistor R14 and resistor R15 are pull-up Resistor, which allows useful signals with an amplitude of 3V-15V to pass through, and suppresses noise interference that does not overlap in time. On the other hand, when the signal is lower than 3V or higher than 15V, the corresponding voltage regulator tubes Z1 and Z2 break down, and after amplification The signal is applied to the gate ...

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Abstract

The invention publishes a data converter of an atmosphere dust monitoring signal. A band pass filter in a bandpass filtering amplification circuit filters pilot-frequency interference from 200-1000Hzsignals which are output by an RS485 interface of a dust concentration sensor in the model of GCG1000, and the filtered signals are input to an adjustable anti-resonance circuit with the core of a triode Q1, and resonated with a signal in the certain frequency ranging from 200-1000Hz; the signal is then input to a voltage-frequency conversion circuit which is composed of a frequency-voltage conversion chip U1, resistors R6 to R11, capacitors C7 to C9 and a potentiometer RP1, and converted into a 2V-6V voltage signal in linear relation with the frequency; and the signal is finally input to a voltage adjusting circuit in which a 2V-6V voltage signal is obtained by an impedance match circuit in an attenuation free way, the signal is amplified proportionally by an amplifier, an MOS tube T1 feeds back voltage regulation, diodes D1 and D2 isolate signals lower than 3V or higher than 15V, and the signal is then transmitted to an RS232 interface of a GPRS communication module. The problems that a monitoring center server cannot receive signals accurately and the concrete position of the received signal is not clear are solved effectively.

Description

technical field [0001] The invention relates to the technical field of coal mine and atmospheric dust monitoring, in particular to an atmospheric dust monitoring signal data conversion device. Background technique [0002] A large amount of dust will be produced in coal mine production. Dust not only brings safety problems such as dust explosion to coal mine production, but also greatly affects the health problems of coal miners (causing respiratory diseases, pneumoconiosis, etc.), so dust is measured and monitored, and then It is very necessary to carry out dust control. At present, the dust concentration sensor of model GCG1000 is mainly used to collect the instantaneous information of the atmospheric dust concentration of coal mines. After entering the data conversion device through the RS485 serial port line (A / D conversion device or RS232, etc. are converted into corresponding communication modules) or the signal that the computer can receive) is serially connected to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06G08C17/02
CPCG01N15/06G08C17/02
Inventor 毛春丽王艳娇赵昆南高申俊樊玉江张海郭志军刘晓蒋利霞
Owner 河南鑫安利职业健康科技有限公司