CN202793686U - Digital pressure high-precision data collecting system - Google Patents
Digital pressure high-precision data collecting system Download PDFInfo
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- CN202793686U CN202793686U CN 201220393121 CN201220393121U CN202793686U CN 202793686 U CN202793686 U CN 202793686U CN 201220393121 CN201220393121 CN 201220393121 CN 201220393121 U CN201220393121 U CN 201220393121U CN 202793686 U CN202793686 U CN 202793686U
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Abstract
The utility model discloses a digital pressure high-precision data collecting system, comprising a plurality of resistance-type pressure sensors, a multi-path analogue selection switch, a front-end conditioning circuit, an analogue-to-digital (A/D) converter, a data collecting module, a microprocessor and a wireless communication module, wherein the output end of each resistance-type pressure sensor is connected with one end of the multi-path analogue selection switch; the other end of the multi-path analogue selection switch is connected with the input end of the front-end conditioning circuit; the output end of the front-end conditioning circuit is connected with the signal input end of the A/D converter; the signal output end of the A/D converter is connected with the signal input end of the data collecting module; the signal output end of the data collecting module is connected with the signal input end of the microprocessor, and the microprocessor is connected with the wireless communication module. By adopting the technical scheme, a nonlinear error compensation problem of the resistance-type pressure sensor caused by temperature drifting and zero drifting is solved, and the measurement accuracy of the entire system is also improved.
Description
Technical field
The utility model relates to a kind of data acquisition system (DAS), particularly relates to a kind of digital pressure High Precise Data Acquisition System.
Background technology
At oil, chemical industry, metallurgy, electric power, prevent, in the industry such as light industry, water conservancy and the scientific research field, the pressure detection that all must be correlated with and analysis, pressure transducer measuring error size directly has influence on the performance of TT﹠C system, resistive pressure sensor is one of most widely used pressure transducer, resistive pressure sensor has temperature coefficient, can produce temperature error; Resistive pressure sensor has again nonlinearity erron, and therefore, pressure transducer has in actual applications the temperature and pressure error and exists, and when utilizing pressure transducer to carry out high-acruracy survey, will the error of pressure transducer be compensated.
Summary of the invention
The purpose of this utility model is that a kind of digital pressure High Precise Data Acquisition System that has compensate function, measuring accuracy height, can carry out remote transmission is provided in order to address the above problem.
The utility model is achieved through the following technical solutions:
A kind of digital pressure High Precise Data Acquisition System, comprise a plurality of resistive pressure sensors, the multi-channel analog selector switch, the front end modulate circuit, A/D converter, data acquisition module, microprocessor and wireless communication module, the output terminal of each described resistive pressure sensor is connected with an end of described multi-channel analog selector switch, the other end of described multi-channel analog selector switch is connected with the input end of described front end modulate circuit, the output terminal of described front end modulate circuit is connected with described A/D converter signal input part, the signal output part of described A/D converter is connected with the signal input part of described data acquisition module, the signal output part of described data acquisition module is connected with the signal input part of described microprocessor, and described microprocessor is connected with described wireless communication module.
Resistive pressure sensor detects the pressure of different measuring point, the multi-channel analog selector switch need to select the resistive pressure sensor of measurement, the pressure simulation signal that resistive pressure sensor detects is through amplifying conditioning by the front end modulate circuit, simulated pressure signal after the conditioning is converted into digital signal by A/D converter, digital signal transfers to microprocessor by data acquisition module, microprocessor is processed and is analyzed the digital pressure signal that receives, and the pressure on the number signal after will analyzing transfers to wireless communication module.
Further, described front end modulate circuit comprises the first amplifier, the second amplifier, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and the 6th resistance, the first end of the first end of described the first resistance and described the second resistance be connected the negative input of the first amplifier and be connected, the second end of described the second resistance and the output terminal of described the first amplifier be connected the first end of the 3rd resistance and be connected, the electrode input end of described the first amplifier respectively with the first end of described the 5th resistance be connected the first end of the 6th resistance and be connected, the second end of described the 6th resistance respectively with the first end of described the 4th resistance, the output terminal of the second amplifier be connected the negative input of amplifier and connect.
As preferably, described data acquisition system (DAS) also comprises USB interface, and described USB interface is connected with described microprocessor.
As preferably, described data acquisition system (DAS) also comprises real time clock circuit, and described real time clock circuit is connected with described microprocessor.
The beneficial effects of the utility model are:
By adopting technique scheme, the utility model has solved resistive pressure sensor because the nonlinear error compensation problem that temperature is faded and fall, fade and fall zero point etc. causes, improve the measuring accuracy of whole system, can be widely used in the collection of industrial circle pressure data, detection, analysis and remote monitoring.
Description of drawings
Fig. 1 is the structured flowchart of the utility model digital pressure High Precise Data Acquisition System;
Fig. 2 is the circuit diagram of front end modulate circuit in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments:
As shown in Figure 1, the utility model digital pressure High Precise Data Acquisition System, comprise a plurality of resistive pressure sensors, the multi-channel analog selector switch, the front end modulate circuit, A/D converter, data acquisition module, microprocessor and wireless communication module, the output terminal of each described resistive pressure sensor is connected with an end of described multi-channel analog selector switch, the other end of described multi-channel analog selector switch is connected with the input end of described front end modulate circuit, the output terminal of described front end modulate circuit is connected with described A/D converter signal input part, the signal output part of described A/D converter is connected with the signal input part of described data acquisition module, the signal output part of described data acquisition module is connected with the signal input part of described microprocessor, and described microprocessor is connected with described wireless communication module.
Resistive pressure sensor detects the pressure of different measuring point, the multi-channel analog selector switch need to select the resistive pressure sensor of measurement, the pressure simulation signal that resistive pressure sensor detects is through amplifying conditioning by the front end modulate circuit, simulated pressure signal after the conditioning is converted into digital signal by A/D converter, digital signal transfers to microprocessor by data acquisition module, microprocessor is processed and is analyzed the digital pressure signal that receives, and the pressure on the number signal after will analyzing transfers to wireless communication module.
As shown in Figure 2, described front end modulate circuit comprises the first amplifier A1, the second amplifier A2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6, the first end of the first end of described the first resistance R 1 and described the second resistance R 2 be connected the negative input of the first amplifier A1 and be connected, the second end of described the second resistance R 2 and the output terminal of described the first amplifier A1 be connected the first end of the 3rd resistance R 3 and be connected, the electrode input end of described the first amplifier A1 respectively with the first end of described the 5th resistance R 5 be connected the first end of the 6th resistance R 6 and be connected, the second end of described the 6th resistance R 6 respectively with the first end of described the 4th resistance R 4, the output terminal of the second amplifier A2 be connected the negative input of amplifier A2 and connect.
As shown in Figure 1, described data acquisition system (DAS) also comprises USB interface, and described USB interface is connected with described microprocessor.Described data acquisition system (DAS) also comprises real time clock circuit, and described real time clock circuit is connected with described microprocessor.
Claims (4)
1. digital pressure High Precise Data Acquisition System, it is characterized in that: comprise a plurality of resistive pressure sensors, the multi-channel analog selector switch, the front end modulate circuit, A/D converter, data acquisition module, microprocessor and wireless communication module, the output terminal of each described resistive pressure sensor is connected with an end of described multi-channel analog selector switch, the other end of described multi-channel analog selector switch is connected with the input end of described front end modulate circuit, the output terminal of described front end modulate circuit is connected with described A/D converter signal input part, the signal output part of described A/D converter is connected with the signal input part of described data acquisition module, the signal output part of described data acquisition module is connected with the signal input part of described microprocessor, and described microprocessor is connected with described wireless communication module.
2. digital pressure High Precise Data Acquisition System according to claim 1, it is characterized in that: described front end modulate circuit comprises the first amplifier, the second amplifier, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and the 6th resistance, the first end of the first end of described the first resistance and described the second resistance be connected the negative input of the first amplifier and be connected, the second end of described the second resistance and the output terminal of described the first amplifier be connected the first end of the 3rd resistance and be connected, the electrode input end of described the first amplifier respectively with the first end of described the 5th resistance be connected the first end of the 6th resistance and be connected, the second end of described the 6th resistance respectively with the first end of described the 4th resistance, the output terminal of the second amplifier be connected the negative input of amplifier and connect.
3. digital pressure High Precise Data Acquisition System according to claim 1, it is characterized in that: described data acquisition system (DAS) also comprises USB interface, described USB interface is connected with described microprocessor.
4. digital pressure High Precise Data Acquisition System according to claim 1, it is characterized in that: described data acquisition system (DAS) also comprises real time clock circuit, described real time clock circuit is connected with described microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220393121 CN202793686U (en) | 2012-08-09 | 2012-08-09 | Digital pressure high-precision data collecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220393121 CN202793686U (en) | 2012-08-09 | 2012-08-09 | Digital pressure high-precision data collecting system |
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| Publication Number | Publication Date |
|---|---|
| CN202793686U true CN202793686U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220393121 Expired - Fee Related CN202793686U (en) | 2012-08-09 | 2012-08-09 | Digital pressure high-precision data collecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575464A (en) * | 2012-08-09 | 2014-02-12 | 四川奥格科技有限公司 | High precision digital pressure data collection system |
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2012
- 2012-08-09 CN CN 201220393121 patent/CN202793686U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575464A (en) * | 2012-08-09 | 2014-02-12 | 四川奥格科技有限公司 | High precision digital pressure data collection system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20130809 |