CN202676204U - Oxygen and humiture data acquisition system - Google Patents
Oxygen and humiture data acquisition system Download PDFInfo
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- CN202676204U CN202676204U CN 201220231846 CN201220231846U CN202676204U CN 202676204 U CN202676204 U CN 202676204U CN 201220231846 CN201220231846 CN 201220231846 CN 201220231846 U CN201220231846 U CN 201220231846U CN 202676204 U CN202676204 U CN 202676204U
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Abstract
一种基于LabVIEW软件的氧气、温湿度数据采集系统。主要解决现有的此类数据采集系统中存在的频率低、数据误差大和多点组网困难的问题。其特征在于：所述数据采集系统还包括氧气传感器数据处理电路、美国NI公司的PCI-6251数据采集卡和内置有LabVIEW软件的上位机；氧气传感器数据处理电路采用AD824运算放大器作为核心处理芯片，氧气传感器数据处理电路的信号输入端连接至氧气传感器的信号输出端，氧气传感器数据处理电路的信号输出端连接至数据采集卡的数据输出端；PCI-6251数据采集卡的数据输出端连接至上位机的数据输入端。所述系统可实现氧气、温湿度数据的高频率采样和多点数据采集，易于实现组网通信，具有较强的抗故障能力。
An oxygen, temperature and humidity data acquisition system based on LabVIEW software. It mainly solves the problems of low frequency, large data error and difficult multi-point networking existing in the existing data acquisition system. It is characterized in that: the data acquisition system also includes an oxygen sensor data processing circuit, a PCI-6251 data acquisition card of American NI Company and a host computer with built-in LabVIEW software; the oxygen sensor data processing circuit adopts AD824 operational amplifier as the core processing chip, The signal input end of the oxygen sensor data processing circuit is connected to the signal output end of the oxygen sensor, and the signal output end of the oxygen sensor data processing circuit is connected to the data output end of the data acquisition card; the data output end of the PCI-6251 data acquisition card is connected to the host The data input terminal of the machine. The system can realize high-frequency sampling and multi-point data collection of oxygen, temperature and humidity data, is easy to realize network communication, and has strong anti-fault ability.
Description
Technical field
The utility model relates to a kind of being applied in the environmental parameter fields of measurement, the device that oxygen, humiture data are gathered.
Background technology
Traditional oxygen, humiture data acquisition system (DAS) normal operation single-chip microcomputer are as the core control element, cooperate the A/D module, LCD MODULE etc. are carried out data collection task, its frequency acquisition is low, data error is large, the shortcomings such as multiple spot networking difficulty all are difficult to overcome, and the sensor great majority for detection of oxygen are measured oxygen concentration by resistance or the capacitance variations of its probe on the traditional industry, are vulnerable to the interference in external electrical field, magnetic field etc.And in inflammable, explosive environments, also can bring the hidden danger of secure context.
Summary of the invention
In order to solve the technical matters of mentioning in the background technology, the utility model provides a kind of oxygen, humiture data acquisition system (DAS) of the LabVIEW of application software, this kind system can realize high-frequency sampling and the multi-point data acquisition of oxygen, humiture data, be easy to realize group-net communication, have stronger fault-resistant ability.
The technical solution of the utility model is: this kind oxygen, humiture data acquisition system (DAS), comprise oxygen sensor, temperature sensor and humidity sensor, it is characterized in that: described data acquisition system (DAS) also comprises the PCI-6251 data collecting card of oxygen sensor data treatment circuit, America NI company and is built-in with the host computer of LabVIEW software; Described oxygen sensor data treatment circuit adopts the AD824 operational amplifier as kernel processor chip, the signal input part of described oxygen sensor data treatment circuit is connected to the signal output part of oxygen sensor, and the signal output part of oxygen sensor data treatment circuit is connected to the data output end of PCI-6251 data collecting card; The data output end of described PCI-6251 data collecting card is connected to the data input pin of host computer.
In addition, on above scheme basis, can obtain further prioritization scheme, namely between the data input pin of the data output end of described oxygen sensor data treatment circuit and PCI-6251 data collecting card, be connected with an oxygen data and process the intermediate buffering circuit.
The utlity model has following beneficial effect: this kind system constructing oxygen, the humiture data acquisition system (DAS) that can use LabVIEW software, therefore formed a virtual instrument platform.This platform has powerful data acquisition ability, and friendly programmed environment and diversified network communications capability can satisfy the needs of industrial and agricultural production better.This data acquisition system (DAS) can realize the high-frequency sampling of data, sample frequency reaches more than the 1KHz, this system can realize multi-point data acquisition simultaneously, as long as possess unified monitor terminal upper computer software, the wasting of resources that just can avoid legacy equipment when multipoint acquisition, to cause, and can realize the group-net communication of each monitor terminal, realize the remote communication of data, and can strengthen the fault-resistant ability.In addition, the advantages such as this system peripherals circuit is few, good reliability, good stability, highly sensitive, analysis is rapid have wide market application foreground.
Description of drawings:
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the electrical schematic diagram of showing oxygen sensor data treatment circuit described in the utility model.
Fig. 3 shows that oxygen data is processed the intermediate buffering circuit described in the utility model.
Embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
By shown in Figure 1, this kind is based on oxygen, the humiture data acquisition system (DAS) of LabVIEW software, comprise oxygen sensor, temperature sensor and humidity sensor, it is characterized in that: described data acquisition system (DAS) also comprises the PCI-6251 data collecting card of oxygen sensor data treatment circuit, America NI company and is built-in with the host computer of LabVIEW software; Described oxygen sensor data treatment circuit adopts the AD824 operational amplifier as kernel processor chip, the signal input part of described oxygen sensor data treatment circuit is connected to the signal output part of oxygen sensor, and the signal output part of oxygen sensor data treatment circuit is connected to the data output end of PCI-6251 data collecting card; The data output end of described PCI-6251 data collecting card is connected to the data input pin of host computer.
Fig. 2 is the electrical schematic diagram of showing oxygen sensor data treatment circuit described in the utility model.Why need to add this circuit, be because: the switching signal for temperature and moisture sensors is standard signal, and the AJD-I oxygen sensor can only convert the oxygen signal to 0～4mV electric signal, could collect by capture card after need to being further processed as 1～5V standard signal.The acp chip of this signal processing circuit is the AD824 operational amplifier, and this amplifier is the operational amplifier that single supply, low-power consumption, the accurate field effect of ADI's production inputted, and the operational amplifier of four Performance Match is contained in this amplifier inside.
Because initial oxygen signal is the faint small-signal of 0～4mV, exist simultaneously the disturbing signal of certain frequency in this signal, affect the measuring accuracy of oxygen content, need to carry out filtering and go to disturb processing, therefore, can between the data input pin of the data output end of described oxygen sensor data treatment circuit and PCI-6251 data collecting card, be connected with an oxygen data and process the intermediate buffering circuit.Its circuit diagram as shown in Figure 3, this filtering circuit adopts the RC filtering circuit, wherein resistance R can be finely tuned by adjustable resistance, by the reality debugging, selects suitable filter resistance, thereby filtering interference signals.
The PCI-6251 data collecting card that adopts America NI company to produce in this programme is realized the collection of voltage signal that oxygen, temperature-humidity sensor are produced, and the DAQ module that carries by LabVIEW software is set up communicating by letter between capture card and the terminating machine.Utilize LabVIEW software to programme as platform, design and to realize that voltage signal calculates and show the host computer terminal platform of oxygen, temperature, humidity.
After native system gathers the oxygen in the work condition environment, temperature, humidity value by sensor, be converted into the voltage of 1～5V by signal processing circuit, then utilize NI PCI-6251 data collecting card that these voltages are gathered the analysis platform to LabVIEW, algorithm by analysis platform, to data analysis and the calculating of uploading, draw the corresponding work condition environment value of information, and draw change curve, find out simultaneously extreme value and key value in the work condition environment, these extreme values and key value are filed, conveniently later call and do analysis.And in order to carry out conduct monitoring at all levels to work condition environment, capture card can gather multipoint data simultaneously, and can have many cover capture cards to work simultaneously simultaneously, has greatly strengthened environmental monitoring and acquisition capacity; And the corresponding terminal LabVIEW platform of each capture card, can communicate by LAN (Local Area Network) between the terminal, the data message that exchange gathers, when one of them terminal platform meets with the collection fault, as long as capture card and network can normally use, other terminal platform just can replace this terminal to carry out data analysis work, has greatly improved the ability of the fault-resistant of whole supervisory system.
Claims (1)
1. an oxygen, humiture data acquisition system (DAS), comprise oxygen sensor, temperature sensor and humidity sensor, it is characterized in that: described data acquisition system (DAS) also comprises PCI-6251 data collecting card and the host computer of oxygen sensor data treatment circuit, America NI company; Described oxygen sensor data treatment circuit adopts the AD824 operational amplifier as kernel processor chip, the signal input part of described oxygen sensor data treatment circuit is connected to the signal output part of oxygen sensor, and the signal output part of oxygen sensor data treatment circuit is connected to the data output end of PCI-6251 data collecting card; The data output end of described PCI-6251 data collecting card is connected to the data input pin of host computer; Between the data input pin of the data output end of described oxygen sensor data treatment circuit and PCI-6251 data collecting card, be connected with an oxygen data and process the intermediate buffering circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231846 CN202676204U (en) | 2012-05-22 | 2012-05-22 | Oxygen and humiture data acquisition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231846 CN202676204U (en) | 2012-05-22 | 2012-05-22 | Oxygen and humiture data acquisition system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202676204U true CN202676204U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220231846 Expired - Fee Related CN202676204U (en) | 2012-05-22 | 2012-05-22 | Oxygen and humiture data acquisition system |
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| CN (1) | CN202676204U (en) |
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2012
- 2012-05-22 CN CN 201220231846 patent/CN202676204U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130116 Termination date: 20130522 |