阅读说明：本技术 光学空气粒子计数传感器稳定性测试系统 (Stability testing system for optical air particle counting sensor ) 是由 马忠杰 惠旅锋 张亚 朱程前 朱亚博 耿笠 于 2019-12-17 设计创作，主要内容包括：本发明公开了一种光学空气粒子计数传感器稳定性测试系统,包括前面板、机箱底板、后面板。前面板设置有BNC接口、前面板PCB、温湿度传感器、进气口；机箱底板设置有开关电源、气泵、数据采集卡、流量传感器；后面板设置有计数采集卡、出气口。该系统通过温湿度传感器采集现场温湿度参数,通过前面板PCB采集流量数据和控制流速,通过数据采集卡采集模拟信号,通过计数采集卡采集粒子。通过上述方式,本发明能够实现测试自动化、无纸化,提高生产效率,为现产光学空气粒子计数传感器的产品稳定性、生产一致性提供分析指导依据,为光学空气粒子计数传感器的升级维护、问题分析与数据统计提供科学依据。(The invention discloses a stability test system of an optical air particle counting sensor, which comprises a front panel, a chassis bottom plate and a rear panel. The front panel is provided with a BNC interface, a front panel PCB, a temperature and humidity sensor and an air inlet; the chassis bottom plate is provided with a switching power supply, an air pump, a data acquisition card and a flow sensor; the back panel is provided with a counting acquisition card and an air outlet. The system collects field temperature and humidity parameters through a temperature and humidity sensor, collects flow data and controls flow speed through a front panel PCB, collects analog signals through a data collection card, and collects particles through a counting collection card. By the mode, the test automation and paperless test method can realize test automation and paperless test, improve production efficiency, provide analysis guidance basis for product stability and production consistency of the existing optical air particle counting sensor, and provide scientific basis for upgrading maintenance, problem analysis and data statistics of the optical air particle counting sensor.)

1. An optical air particle counting sensor stability testing system, comprising:

the front panel and the rear panel are arranged on two sides of the chassis base plate;

the front panel is provided with a main switch, a BNC interface, a front panel PCB, a temperature and humidity sensor and an air inlet, and the front panel PCB is electrically connected with the BNC interface and the temperature and humidity sensor through wires respectively;

the chassis base plate is provided with a first power supply, a second power supply, a support frame, an air pump driver and an air pump, and the support frame is provided with a data acquisition card;

the rear panel is provided with a power socket, a counting and collecting card and an air outlet; the power socket is electrically connected with the main switch, the first power supply and the second power supply in sequence through leads, the first power supply is electrically connected with the front panel PCB through leads, and the second power supply is electrically connected with the air pump driver and the air pump in sequence through leads; the front panel PCB is electrically connected with the counting acquisition card, the data acquisition card, the air pump driver and the flow sensor through leads respectively; the air inlet is connected with the flow sensor through a pneumatic hose, and the air pump is connected with the air outlet through a pneumatic hose.

2. The optical air particle counting sensor stability testing system of claim 1, wherein: the first power supply and the second power supply are switching power supplies.

3. The optical air particle counting sensor stability testing system of claim 1, wherein: the voltage or current provided by the first power source is less than the voltage or current provided by the second power source.

4. The optical air particle counting sensor stability testing system of claim 1, wherein: and the chassis bottom plate is also provided with a filter, and the filter is electrically connected with the power socket and the main switch through leads respectively.

5. The optical air particle counting sensor stability testing system of claim 1, wherein: still include flow sensor, flow sensor connects on the air pump.

6. The optical air particle counting sensor stability testing system of claim 1, wherein: the USB interface is electrically connected with the data acquisition card through a wire.

7. The optical air particle counting sensor stability testing system of claim 1, wherein: the support frame is made of metal plates or stainless steel.

Technical Field

The invention relates to the technical field of air particle counting, in particular to a stability testing system of an optical air particle counting sensor.

Background

The air particle counter is an instrument used in the field of clean room environment monitoring, and has the functions of counting and analyzing the number of micro particles in the atmosphere in a clean environment and judging the clean grade of the clean environment according to international standards such as ISO14644-1 and the like. In recent years, with the continuous rising of the requirement for environment cleanliness in the fields of microelectronics, precision machinery, fine chemical engineering, medicine production, food production and the like, the optical air particle counter has been rapidly developed.

The demand for optical air particle counting sensors, which are the core components of optical air particle counters, is also expanding. In the actual production, maintenance and customer repair of the optical air particle counting sensor, problems are frequently checked, and the consistency and stability of the product are difficult to quantify.

At present, most of produced optical air particle counting sensors are tested on a prototype after being assembled, test data are recorded manually, time and labor are wasted, and errors are easy to occur. If the problem is found, the work efficiency is low, the experience dependence degree is high, and new staff cannot master the problem quickly. The above problems and defects bring great difficulties to problem analysis and data statistics of the optical air particle counting sensor, and are not favorable for the optimization design of the subsequent optical air particle counting sensor.

Disclosure of Invention

The invention mainly solves the technical problem of providing the stability test system of the optical air particle counting sensor, which is simple to operate and high in test automation degree.

In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:

an optical air particle counting sensor stability testing system, comprising:

the front panel and the rear panel are arranged on two sides of the chassis base plate; the front panel is provided with a main switch, a BNC interface, a front panel PCB, a temperature and humidity sensor and an air inlet, and the front panel PCB is electrically connected with the BNC interface and the temperature and humidity sensor through wires respectively; the chassis base plate is provided with a first power supply, a second power supply, a support frame, an air pump driver and an air pump, and the support frame is provided with a data acquisition card; the rear panel is provided with a power socket, a counting and collecting card and an air outlet; the power socket is electrically connected with the main switch, the first power supply and the second power supply in sequence through leads, the first power supply is electrically connected with the front panel PCB through leads, and the second power supply is electrically connected with the air pump driver and the air pump in sequence through leads; the front panel PCB is electrically connected with the counting acquisition card, the data acquisition card, the air pump driver and the flow sensor through leads respectively; the air inlet is connected with the flow sensor through a pneumatic hose, and the air pump is connected with the air outlet through a pneumatic hose.

Preferably, the first power supply and the second power supply are switching power supplies.

Preferably, the voltage or current provided by the first power supply is less than the voltage or current provided by the second power supply.

Preferably, a filter is further arranged on the chassis base plate, and the filter is electrically connected with the power socket and the main switch through wires respectively.

Preferably, the air pump further comprises a flow sensor, and the flow sensor is connected to the air pump.

Preferably, the system further comprises a USB adapter, and the USB adapter is electrically connected with the data acquisition card through a wire.

Preferably, the support frame is made of sheet metal or stainless steel.

Due to the application of the technical scheme, compared with the prior art, the invention has the following beneficial effects:

the system comprises a temperature and humidity sensor, a front panel PCB, a flow sensor, an air pump driver, a data acquisition card, a counting acquisition card and a test system, wherein the temperature and humidity sensor is used for acquiring field temperature and humidity parameters, the front panel PCB is used for acquiring data of a flow sensor and controlling the air pump driver so as to control the flow speed of an air pump, the data acquisition card is used for acquiring analog quantity signal data of the produced optical air particle counting sensor, the counting acquisition card is used for acquiring particle number data of the optical air particle counting sensor, and the test system is tested in a circulating mode within a period of time, so that the field temperature and humidity parameters, the air flow rate, the analog quantity signal, the.

The system can realize test automation and paperless, improves production efficiency, provides analysis guidance basis for product stability and production consistency of the optical air particle counting sensor produced at present, and provides scientific basis for upgrading maintenance, problem analysis and data statistics of the optical air particle counting sensor.

Drawings

FIG. 1 is a schematic diagram of a system for testing the stability of an optical air particle counting sensor according to the present invention.

FIG. 2 is a schematic structural diagram of a system for testing stability of an optical air particle counting sensor according to the present invention.

FIG. 3 is a top view of an optical air particle counting sensor stability testing system of the present invention.

FIG. 4 is a schematic diagram of another embodiment of a system for testing stability of an optical air particle counting sensor according to the present invention.

FIG. 5 is a schematic diagram of an optical air particle counting sensor stability testing system of the present invention during use.

Description of reference numerals:

1. the device comprises a front panel, a chassis base plate, a rear panel, a front panel, an optical air particle counting sensor, a computer PC 101, a main switch, a temperature and humidity sensor, a BNC interface, a computer PC 103, a front panel PCB 104, a temperature and humidity sensor 105, an air inlet 201, a filter 202, a small switch power supply 203, a large switch power supply 204, a support frame 205, a data acquisition card 206, an air pump driver 207, an air pump 208, a flow sensor 301, a power supply socket 302, a counting acquisition card 303, a USB adapter interface 304, an air outlet 401, a counting sensor air nozzle 402 and a counting sensor circuit board.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

Referring to the attached drawings, the optical air particle counting sensor stability testing system mainly comprises a front panel 1, a chassis bottom plate 2 and a rear panel 3.

The front panel 1 is provided with a main switch 101, a BNC interface 102, a front panel PCB103, a temperature and humidity sensor 104 and an air inlet 105; the front panel PCB103 is electrically connected to the BNC interface 102 and the temperature and humidity sensor 104 through wires. In the invention, the temperature and humidity sensor can be a temperature and humidity sensor with the model of HSTL-10TH (RS-485).

The chassis base plate 2 is provided with a filter 201, a first power supply, a second power supply, a support frame 204, an air pump driver 206 and an air pump 207, and the air pump 207 is provided with a flow sensor 208. The support frame 204 is provided with a data acquisition card 205, and the support frame 204 is made of metal plates or stainless steel materials.

The first power supply and the second power supply both adopt switch power supplies, the voltage or current provided by the first power supply is smaller than the voltage or current provided by the second power supply, namely, the opposite first power supply is a small switch power supply 202, and the second power supply is a large switch power supply 203. In the invention, the first power supply can adopt a switching power supply with the model of MW-NET-35B, and the second power supply can adopt a switching power supply with the model of MW-SP-240-24.

The rear panel 3 is provided with a power socket 301, a counting acquisition card 302, a USB adapter 303 and an air outlet 304. The power jack 301 is electrically connected to the filter 201, the main switch 101, the small switching power supply 202, and the large switching power supply 203 in this order by wires. By setting the filter 201, the irregular electric wave output from the power outlet 301 can be converted into a regular electric wave, such as a sine wave. In the present invention, the filter may be a filter of model number JRW 1310-22.

The small switch power supply 202 is electrically connected with the front panel PCB103 through a lead to provide +/-12V voltage and 1A current for the front panel PCB 103; the large switch power supply 203 is electrically connected with the air pump driver 206 and the air pump 207 in sequence through leads, and the large switch power supply 203 provides 24V voltage and 10A current for the air pump driver 206. In the invention, the air pump driver can be the air pump driver with model number WS2408DY01V 01.

The front panel PCB103 is electrically connected with the counting acquisition card 302, the data acquisition card 205, the USB adapter 303, the air pump driver 206 and the flow sensor 208 through wires respectively. Due to different data signal transmission modes of the data acquisition card, a USB adapter 303 can be arranged, and the data acquisition card 205 is electrically connected with the USB adapter 303 through a wire. In the invention, the data acquisition card can be a data acquisition card with the model of NI-6218, and the counting acquisition card can be a counting acquisition card with the model of MCC-CTR 08.

The air inlet 105 is connected with the flow sensor 208 through a pneumatic hose, the air pump 207 is connected with the air outlet 304 through a pneumatic hose, and the magnitude of the air flow passing through the flow sensor 208 can be acquired in real time through the flow sensor 208. In the invention, the flow sensor can be a flow sensor with the model F1031 (50L).

In the above embodiment, as shown in fig. 1 and fig. 5, the optical air particle counting sensor 4, the stability testing system of the optical air particle counting sensor of the present invention, and the computer PC5 are sequentially placed on the workbench, and the mains power is connected to the power socket 301, and the main switch 101 of the power supply is turned on. The air tap 401 of the counting sensor is connected with the air inlet 105 of the optical air particle counting sensor stability testing system of the invention through a pneumatic hose, and the circuit board 402 of the counting sensor is electrically connected with the BNC interface 102 and the front panel PCB103 of the optical air particle counting sensor stability testing system of the invention through wires. The counting acquisition card 302 and the USB adapter 303 of the optical air particle counting sensor stability testing system are electrically connected with the computer PC5 through wires.

At this point, the field temperature and humidity parameters are collected by the temperature and humidity sensor 104 and are sent to the computer PC5 through the front panel PCB103 and the USB adapter 303; the gas flow velocity in the gas path hose is collected by the flow sensor 208 and is sent to the computer PC5 through the front panel PCB103 and the USB adapter 303; the signals of the optical air particle counting sensor 4 are transmitted to the data acquisition card 205 and the counting acquisition card 302 through the front panel PCB103, the data acquisition card 205 and the counting acquisition card 302 process the signals respectively and transmit the signals to the computer PC5, and the data are recorded and stored by the computer PC 5.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.