Optical Air Particle Count Sensor Stability Test System

Abstract

The present invention discloses a stability test system for an optical air particle counting sensor, including 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 rear panel is provided with a counting acquisition card and an air outlet. The system collects on-site temperature and humidity parameters through a temperature and humidity sensor, collects flow data and controls flow rate through a front panel PCB, collects analog signals through a data acquisition card, and collects particles through a counting acquisition card. Through the above-mentioned manner, the present invention can realize automated and paperless testing, improve production efficiency, provide an analysis and guidance basis for the product stability and production consistency of currently produced optical air particle counting sensors, and provide a scientific basis for the upgrade maintenance, problem analysis and data statistics of optical air particle counting sensors.

Description

Technical Field

[0001] The invention relates to the technical field of air particle counting, and in particular to a stability testing system for an optical air particle counting sensor. Background Art

[0002] Air particle counter is an instrument used in the field of clean room environment monitoring. Its function is to count and analyze the number of microscopic particles in the atmosphere of the clean environment, and make a clean level judgment on the clean environment according to international standards such as ISO14644-1. In recent years, with the increasing demand for environmental cleanliness in the fields of microelectronics, precision machinery, fine chemicals, pharmaceutical production, food production, etc., optical air particle counters have developed rapidly.

[0003] As the core component of optical air particle counters, the demand for optical air particle counting sensors is also expanding. In the actual production, maintenance and customer repair of optical air particle counting sensors, it is often necessary to troubleshoot problems, and the consistency and stability of the products are difficult to quantify.

[0004] At present, most of the optical air particle counting sensors in production are tested on prototypes after assembly, and the test data is recorded manually, which is time-consuming, labor-intensive, and prone to errors. If problems are found, the sensors need to be disassembled and reworked, which is inefficient and highly dependent on experience, making it difficult for new employees to master them quickly. The above problems and defects have brought great difficulties to the problem analysis and data statistics of optical air particle counting sensors, and are not conducive to the subsequent optimization design of optical air particle counting sensors. Summary of the invention

[0005] The main technical problem solved by the present invention is to provide an optical air particle counting sensor stability testing system with simple operation and high test automation.

[0006] In order to achieve the above object, the technical solution adopted by the present invention to solve the technical problem is:

[0007] An optical air particle counting sensor stability test system, comprising:

[0008] A front panel, a chassis bottom plate and a rear panel, wherein the front panel and the rear panel are arranged on both sides of the chassis bottom plate; a main switch, a BNC interface, a front panel PCB, a temperature and humidity sensor and an air inlet are arranged on the front panel, and the front panel PCB is electrically connected to the BNC interface and the temperature and humidity sensor through wires; a first power supply, a second power supply, a support frame, an air pump driver and an air pump are arranged on the chassis bottom plate, and a data acquisition card is arranged on the support frame; a power socket, a counting acquisition card and an air outlet are arranged on the rear panel; the power socket is electrically connected to the main switch, the first power supply and the second power supply in sequence through wires, the first power supply is electrically connected to the front panel PCB through wires, and the second power supply is electrically connected to the air pump driver and the air pump in sequence through wires; the front panel PCB is electrically connected to the counting acquisition card, the data acquisition card, the air pump driver and the flow sensor through wires; the air inlet is connected to the flow sensor through a pneumatic hose, and the air pump is connected to the air outlet through a pneumatic hose.

[0009] Preferably, the first power supply and the second power supply are switching power supplies.

[0010] Preferably, the voltage or current provided by the first power supply is smaller than the voltage or current provided by the second power supply.

[0011] Preferably, a filter is also provided on the chassis bottom plate, and the filter is electrically connected to the power socket and the main switch respectively through wires.

[0012] Preferably, a flow sensor is further included, and the flow sensor is connected to the air pump.

[0013] Preferably, it also includes a USB converter, and the USB converter is electrically connected to the data acquisition card through a wire.

[0014] Preferably, the support frame is made of sheet metal or stainless steel.

[0015] Due to the application of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0016] Provided is a stability test system for an optical air particle counting sensor. The system collects on-site temperature and humidity parameters through a temperature and humidity sensor, collects flow sensor data and controls an air pump driver through a front panel PCB to control the air pump flow rate, collects analog signal data of the produced optical air particle counting sensor through a data acquisition card, collects particle number data of the optical air particle counting sensor through a counting acquisition card, and performs cyclic testing within a period of time. The system can record on-site temperature and humidity parameters, air flow rate, analog signal, particle number data and other related parameters of the produced optical air particle counting sensor one by one.

[0017] The system can realize automated and paperless testing, improve production efficiency, provide analytical guidance for product stability and production consistency of existing optical air particle counting sensors, and provide a scientific basis for the upgrade, maintenance, problem analysis and data statistics of optical air particle counting sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the principle of a stability testing system for an optical air particle counting sensor of the present invention.

[0019] Figure 2 It is a structural schematic diagram of an optical air particle counting sensor stability testing system of the present invention.

[0020] Figure 3 It is a top view of an optical air particle counting sensor stability testing system of the present invention.

[0021] Figure 4 It is a structural schematic diagram of another angle of an optical air particle counting sensor stability testing system of the present invention.

[0022] Figure 5 The present invention is a schematic diagram of an optical air particle counting sensor stability testing system during use.

[0023] Description of reference numerals:

[0024] 1. Front panel, 2. Chassis bottom plate, 3. Rear panel, 4. Optical air particle counting sensor, 5. Computer PC, 101. Main switch, 102. BNC interface, 103. Front panel PCB, 104. Temperature and humidity sensor, 105. Air inlet, 201. Filter, 202. Small switching power supply, 203. Large switching power supply, 204. Support frame, 205. Data acquisition card, 206. Air pump driver, 207. Air pump, 208. Flow sensor, 301. Power socket, 302. Counting acquisition card, 303. USB adapter, 304. Air outlet, 401. Counting sensor nozzle, 402. Counting sensor circuit board. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0026] Referring to the attached drawings, a stability test system for an optical air particle counting sensor mainly includes a front panel 1 , a chassis bottom panel 2 , and a rear panel 3 .

[0027] The front panel 1 is provided with a main switch 101, a BNC interface 102, a front panel PCB 103, a temperature and humidity sensor 104, and an air inlet 105; the front panel PCB 103 is electrically connected to the BNC interface 102 and the temperature and humidity sensor 104 through wires. In the present invention, the temperature and humidity sensor can be a HSTL-10TH (RS-485) temperature and humidity sensor.

[0028] The chassis bottom 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. 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 material of the support frame 204 is sheet metal or stainless steel.

[0029] Wherein, the first power supply and the second power supply are both switching power supplies, and the voltage or current provided by the first power supply is less than the voltage or current provided by the second power supply, that is, the first power supply is a small switching power supply 202, and the second power supply is a large switching power supply 203. In the present invention, the first power supply can be a switching power supply of model MW-NET-35B, and the second power supply can be a switching power supply of model MW-SP-240-24.

[0030] 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 socket 301 is electrically connected to the filter 201, the main switch 101, the small switch power supply 202, and the large switch power supply 203 in sequence through wires. Through the setting of the filter 201, the irregular electric wave output by the power socket 301 can be converted into a regular electric wave, such as a sine wave. In the present invention, the filter can be selected from the filter model JRW1310-22.

[0031] The small switching power supply 202 is electrically connected to the front panel PCB 103 through a wire, providing ±12V voltage and 1A current to the front panel PCB 103; the large switching power supply 203 is electrically connected to the air pump driver 206 and the air pump 207 through wires in sequence, and the large switching power supply 203 provides 24V voltage and 10A current to the air pump driver 206. In the present invention, the air pump driver can be a WS2408DY01V01 air pump driver.

[0032] The front panel PCB 103 is electrically connected to the counting acquisition card 302, the data acquisition card 205, the USB transfer interface 303, the air pump driver 206, and the flow sensor 208 through wires. Due to the different data signal transmission modes of the data acquisition card, a USB transfer interface 303 can be provided, and the data acquisition card 205 is electrically connected to the USB transfer interface 303 through wires. In the present invention, the data acquisition card can be a data acquisition card of model NI-6218, and the counting acquisition card can be a counting acquisition card of model MCC-CTR08.

[0033] The air inlet 105 is connected to the flow sensor 208 through a pneumatic hose, and the air pump 207 is connected to the air outlet 304 through a pneumatic hose. The flow sensor 208 can collect the gas flow through the flow sensor 208 in real time. In the present invention, the flow sensor can be a flow sensor of model F1031 (50L).

[0034] In the above embodiment, if Figure 1 and Figure 5 As shown, the produced optical air particle counting sensor 4, the optical air particle counting sensor stability test system of the present invention, and the computer PC5 are placed on the workbench in sequence, the main power is connected to the power socket 301, and the main switch 101 of the power supply is turned on. The counting sensor nozzle 401 is connected to the air inlet 105 of the optical air particle counting sensor stability test system of the present invention through a pneumatic hose, and the counting sensor circuit board 402 is electrically connected to the BNC interface 102 and the front panel PCB103 of the optical air particle counting sensor stability test system of the present invention through a wire. The counting acquisition card 302 and the USB transfer interface 303 of the optical air particle counting sensor stability test system of the present invention are electrically connected to the computer PC5 through a wire.

[0035] At this point, the on-site temperature and humidity parameters are collected by the temperature and humidity sensor 104, and sent to the computer PC5 through the front panel PCB103 and the USB adapter 303; the gas flow rate in the gas hose is collected by the flow sensor 208, and sent to the computer PC5 through the front panel PCB103 and the USB adapter 303; the signal of the produced optical air particle counting sensor 4 reaches 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 send the signals to the computer PC5, which records and stores the data uniformly.

[0036] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An optical air particle counting sensor stability test system, used to connect with an optical air particle counting sensor, characterized in that: include: A front panel, a chassis bottom plate and a rear panel, wherein the front panel and the rear panel are arranged on both sides of the chassis bottom 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 to the BNC interface and the temperature and humidity sensor through wires; The chassis bottom 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 acquisition card and an air outlet; the power socket is electrically connected to the main switch, the first power supply and the second power supply in sequence through wires, the voltage or current provided by the first power supply is less than the voltage or current provided by the second power supply, the first power supply is electrically connected to the front panel PCB through wires, and the second power supply is electrically connected to the air pump driver and the air pump in sequence through wires; the front panel PCB is electrically connected to the counting acquisition card, the data acquisition card, the air pump driver and the flow sensor through wires respectively; the air inlet is connected to the flow sensor through a pneumatic hose, and the air pump is connected to the air outlet through a pneumatic hose; A filter is also provided on the chassis bottom plate, and the filter is electrically connected to the power socket and the main switch through wires, and is used to convert irregular radio waves output by the power socket into regular radio waves; The air inlet is connected to the counting sensor air nozzle through a pneumatic hose, and the BNC interface and the front panel PCB are electrically connected to the counting sensor circuit board through a wire.

2. The optical air particle counting sensor stability testing system according to claim 1, characterized in that: The first power supply and the second power supply are switching power supplies.

3. The optical air particle counting sensor stability testing system according to claim 1, characterized in that: It also includes a flow sensor, which is connected to the air pump.

4. The optical air particle counting sensor stability testing system according to claim 1, characterized in that: It also includes a USB conversion interface, and the USB conversion interface is electrically connected to the data acquisition card through a wire.

5. The optical air particle counting sensor stability testing system according to claim 1, characterized in that: The support frame is made of sheet metal or stainless steel.

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