CN108534950B - Multichannel parallel performance detection system and method for air inlet channel pressure sensor - Google Patents
Multichannel parallel performance detection system and method for air inlet channel pressure sensor Download PDFInfo
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- CN108534950B CN108534950B CN201810743907.5A CN201810743907A CN108534950B CN 108534950 B CN108534950 B CN 108534950B CN 201810743907 A CN201810743907 A CN 201810743907A CN 108534950 B CN108534950 B CN 108534950B
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- pressure sensor
- air inlet
- pressure
- inlet channel
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2853—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals
Abstract
The invention provides a multi-channel parallel performance detection system and a detection method of an air inlet pressure sensor. The performance detection system comprises a pressure control air source, a plurality of tightness detection tools, a T-shaped groove working platform, a stabilized voltage power supply and a control unit, wherein a plurality of air inlet channel assemblies which are respectively connected with a pressure sensor are respectively fixed on the T-shaped groove working platform, each tightness detection tool is fixed on one air inlet channel and each air inlet channel assembly is connected with the pressure control air source through one tightness detection tool and is connected with one air supply branch, the stabilized voltage power supply is respectively electrically connected with each pressure sensor, and the control unit is respectively connected with the pressure control air source, the plurality of pressure sensors and the stabilized voltage power supply and is used for controlling each part and collecting data. The invention is a high-integration, high-automation and high-intelligence performance detection device and method, which can improve the detection efficiency and reduce the cost.
Description
Technical Field
The invention relates to a performance detection system and method of an air inlet pressure sensor, in particular to a multi-channel parallel performance detection system and method of the air inlet pressure sensor.
Background
After the measuring pipe and the pressure sensor on the air inlet channel assembly are installed, the tightness of the joint of the pressure sensor and the measuring pipe is detected under the air pressure strength of 0.70-0.1MPa (gauge pressure), and the pressure drop is not more than 0.01MPa within 5 min. Then, the output voltage of the pressure sensor is detected under the pressure of 0.10MPa, 0.20MPa, 0.40MPa, 0.60MPa and 0.80MPa (absolute pressure) respectively, so as to verify whether the performance of the pressure sensor is intact after being assembled.
In the existing monitoring method, a joint of an airtight tool is connected with a universal pressure test bed. Manually adjusting an air supply valve of the pressure test bed, supplying nitrogen gas of 0.70-0.1MPa (gauge pressure) to the pressure sensor, observing a pressure gauge of the pressure test bed, manually recording the measured value when the pressure drop is not more than 0.01MPa within 5 min.
After the pressure sensor, the direct-current stabilized voltage power supply and the universal meter are qualified, the pressure sensor, the direct-current stabilized voltage power supply and the universal meter are connected in place by utilizing the air inlet passage electrical detection transfer cable, then an air supply valve of the pressure test bed is manually adjusted, nitrogen with the pressure of 0.10MPa, 0.20MPa, 0.40MPa, 0.60MPa and 0.80MPa (absolute pressure) is respectively provided for the pressure sensor, and the output voltage of the pressure sensor is read from the universal meter in the period. After stabilizing for 20S each time the pressure was adjusted again. And manually recording and comparing the voltage measured value with a criterion, wherein all qualified data can pass through.
Firstly, the test air pressure is manually adjusted and output through an air supply valve of the universal pressure test bed, and the precision is low and unstable.
Secondly, the existing detection method needs to be carried out by adopting a method of using a plurality of devices such as a pressure test bed for air supply, a voltage-stabilized power supply, a universal meter for collection and the like in a matching way, and the detection devices are scattered and have low integration level.
Thirdly, different output air pressures during the performance detection of the pressure sensor need to be adjusted manually and repeatedly, long-time pressure stabilization is needed each time, and detection data are manually recorded and judged each time, so that the labor cost is high, and the production efficiency is low.
Moreover, only the detection of a single air inlet channel can be realized at each time, and the efficiency is low.
Disclosure of Invention
The invention provides a performance detection device and a detection method with the characteristics of multipath parallelism, high integration degree, high automation and the like, which are mainly used for detecting the assembly tightness of an air inlet passage pressure sensor and a measuring pipe and the performance of the pressure sensor.
The multi-channel parallel performance detection system of the air inlet channel pressure sensor comprises a pressure control air source, a plurality of sealing detection tools, a T-shaped groove working platform, a stabilized voltage power supply and a control unit, wherein a plurality of air inlet channel assemblies which are respectively connected with the pressure sensor are respectively fixed on the T-shaped groove working platform, each sealing detection tool is fixed on one air inlet channel, each pressure sensor is connected with an air supply branch connected with the pressure control air source through one sealing detection tool, the stabilized voltage power supply is respectively and electrically connected with each pressure sensor, and the control unit is respectively connected with the pressure control air source, the plurality of pressure sensors and the stabilized voltage power supply and used for controlling each part and collecting data.
Preferably the leakproofness detects frock is including erecting baffle, horizontal plate washer, ejector pin and seal assembly, erects the one end of baffle welding at the lower surface of horizontal plate washer, and the ejector pin passes and erects in the screw hole that baffle threaded connection set up on a seal assembly side for fixed seal assembly, on seal assembly's the another side, be provided with the connector that is used for connecting pressure sensor, the pressure control air supply connector intercommunication that sets up on this pressure sensor's connector and the seal assembly lower surface.
Preferably, the sealing detection tool further comprises a supporting plate, the supporting plate is welded to the other end of the lower surface of the transverse baffle plate through a base plate, the supporting plate is a square plate, 8 phi 6 through holes are formed in the frame of the supporting plate, and the sealing detection tool is fixed on the air inlet channel through 8M 5X16 screws and M5 threaded holes in the air inlet channel.
Preferably, the number of the air inlet channel assemblies is four.
The invention relates to a multi-channel parallel performance detection method of an air inlet channel pressure sensor, which is suitable for the detection method of each technical scheme and comprises the following steps: step one, respectively connecting a plurality of pressure sensors with a plurality of air inlet channel assemblies in a one-to-one correspondence manner, and respectively fixing the plurality of air inlet channel assemblies on a T-shaped groove working platform; step two, installing a sealing detection tool on each air inlet channel assembly; thirdly, communicating each pressure sensor with the corresponding air supply branch through the tightness detection tool on the air inlet channel assembly; correspondingly connecting the control unit with the gas supply control branch, the power supply control branch and the data acquisition branch respectively; and fifthly, detecting the performance of the pressure sensor, supplying power to each sensor, supplying gas to each gas supply branch, collecting data, comparing, judging and printing a result.
Preferably, in the first step, the four pressure sensors are respectively connected with one air inlet channel assembly, and the four air inlet channel assemblies connected with the pressure sensors are fixed on the T-shaped groove working platform side by side.
Preferably, the four pressure sensors are respectively communicated with the four gas supply branches connected with the pressure control gas source in a one-to-one correspondence manner by means of a sealing detection tool.
Preferably, the step five comprises: step 1, detecting the sealing performance of the joint of the pressure sensor and the measuring pipe, simultaneously outputting nitrogen gas of 0.70-0.1MPa to each pressure sensor, then maintaining the pressure for 5min, judging that the sealing performance is good if the pressure drop is not more than 0.01MPa, and turning to step 2; step 2, detecting the performance of the pressure sensor: the nitrogen gas of 0.10MPa, 0.20MPa, 0.40MPa, 0.60MPa and 0.80MPa (absolute pressure) is provided for each gas supply branch in a grading way, meanwhile, the control unit controls the voltage-stabilized power supply to input +9V voltage to each pressure sensor respectively, the control unit collects voltage signals output by each pressure sensor, compares the voltage signals with pre-edited judgment data and judges the qualification, and finally, reports are printed and output automatically.
The invention has the following advantages:
1. the air pressure applying method suitable for detecting the performance of the air inlet channel pressure sensor can realize high-precision and stable air pressure within the absolute pressure range of 0.1-2 MPa and the precision of less than or equal to 0.001MPa, and can complete adjustment only within seconds by controlling the high-speed pressure.
2. The automatic measurement and control software is intelligently programmed and can interact with an interface, detection and pressure drop data during 4 paths of air compaction and acquisition of output voltage signals of the pressure sensor can be simultaneously realized, and qualification judgment is completed.
3. Pressure control appearance, nitrogen cylinder, multi-way valve, manometer, constant voltage power supply, pipeline, computer system are high integrated in portable rack, and the structure is exquisite, is convenient for remove, and the outward appearance is pleasing to the eye, firm durable, simple to operate.
4. By using the invention, only 1 operator is needed to complete the connection of the tool with the air inlet channel and the pressure sensor, and the programming and test operation of the detection program are completed, thereby greatly saving the labor cost.
5. The invention can simultaneously complete the performance detection of the 4 air inlet channel pressure sensors, and the detection efficiency is greatly improved.
The invention is a multi-channel, high-integration, high-automation and high-intelligence performance detection device and method suitable for multi-channel performance detection of an air inlet pressure sensor, improves the detection efficiency and reduces the cost.
Drawings
FIG. 1 is a block diagram of a multi-channel parallel performance detection system.
Fig. 2 is a front view of the inlet tooling mechanism.
Fig. 3 is a schematic view of a gas inlet passage tooling mechanism in section.
FIG. 4 is a top view of an inlet tooling mechanism.
Description of the symbols
1. Vertical baffle 2, ejector rod 3, baffle component 4, transverse baffle 5, sealing component 6, backing plate 7, support plate 8, pressure sensor
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
According to one embodiment of the invention, through the matching use of the air inlet channel pressure test and the sensor test platform, the adapter cable and the 4 sets of air tightness detection tools, the performance test of the pressure sensors of the 4 air inlet channel assemblies after assembly is realized. The number of air intake duct assemblies is not limited to 4.
1) 4 air inlet channels are arranged on a T-shaped groove working platform side by side, then 4 pressure sensors 8 are respectively connected with the 4 air inlet channels in place in a one-to-one correspondence manner,
2) 4 air outlet branches 1-4 of the air inlet channel pressure test and sensor test platform are respectively connected with 4 sets of air tightness detection tools, and then the air tightness detection tools are respectively connected with an air inlet channel pressure sensor 8. And finally, respectively connecting the power supply branches 1-4 and the data acquisition branches 1-4 of the adapter cable with the air inlet pressure sensor in place.
3) The structure of the air tightness detection tool is shown in figures 2 and 3. The vertical baffle plate 1, the transverse baffle plate 4, the backing plate 6 and the support plate 7 are welded into a whole, specifically, the vertical baffle plate 1 is welded at one end of the lower surface of the transverse baffle plate 4, the support plate 7 is welded at the other end of the lower surface of the transverse baffle plate 4 by means of the backing plate 6, the support plate 7 is a square plate, and 8 phi 6 through holes are formed in the frame of the square plate. The air tightness detection tool is used as a main support frame of the air tightness detection tool and is firmly connected with an M5 threaded hole in an air inlet channel through 8 phi 6 through holes and 8M 5X16 screws (not shown) in a No. 7 part of a support plate. The seal assembly 5 is then connected to the pressure sensor. Ejector pin 2 is external screw thread spare, and 2 screws in of ejector pin and pass perpendicular baffle 1 and baffle subassembly 3, and threaded connection is tight in the screw hole that sets up on 5 sides of seal assembly in, with 5 tops of seal assembly for fixed seal assembly. Realize airtight detection frock and pressure sensor's sealing connection. And a connector for connecting a pressure sensor is arranged on the other side surface of the sealing assembly 5, and the connector of the pressure sensor is communicated with a pressure control air source connector arranged on the lower surface of the sealing assembly. And finally, connecting the joint at the lowest part of the sealing assembly 5 with an air source interface of an air inlet pressure test and sensor test platform.
4) When the connection tightness of the pressure sensor and the measuring pipe is detected, the automatic measurement and control system gives an instruction to the pressure controller, and outputs 0.70-0.1MPa (gauge pressure) nitrogen to the 4-way pressure sensor at the same time, and then the pressure is maintained. During the period, the automatic measurement and control system reads the air pressure data in the pressure sensor pipeline in real time, compares the air pressure data with the pre-edited criterion and judges the qualification, and finally automatically prints and outputs the report.
5) When the sensor pressurization performance is tested, the automatic measurement and control system gives an instruction to the pressure controller, nitrogen with the pressure of 0.10MPa, 0.20MPa, 0.40MPa, 0.60MPa and 0.80MPa (absolute pressure) is simultaneously and hierarchically provided for the 4-way pressure sensor, and the air pressure is used as a signal source to be loaded on the pressure sensor to be tested. In the period, a stabilized voltage power supply in the air inlet pressure test and sensor test platform supplies power to the branches 1-4 through the adapter cable and simultaneously inputs +9V voltage to the 4 paths of pressure sensors. At the moment, the pressure sensor correspondingly outputs a certain voltage signal, the automatic measurement and control system collects the voltage signal output by the pressure sensor through the adapter cable data collection branch 1-4, the voltage signal is compared with a pre-edited criterion and is subjected to qualification judgment, and finally, a report is automatically printed and output.
6) The whole pressure test and sensor test process can realize automatic measurement, recording, judgment, final report generation and report printing under the program control of automatic measurement and control software.
The key points of the invention are as follows:
1. according to the method, through the matching use of an air inlet channel pressure test and sensor test platform, a transfer cable and 4 sets of air tightness detection tools, the performance test of 4 air inlet channel assembly pressure sensors after assembly is realized.
2. A test platform for air inlet pressure test and sensor comprises a high-precision pressure controller, which can realize high-precision and stable output of test air source; the pressure sensor comprises automatic measurement and control software, can be flexibly programmed, realizes implementation data acquisition and judgment of a high-precision pressure meter and a voltage value, comprises a voltage-stabilized power supply, and can provide +9V and +/-15V voltage input for the pressure sensor.
3. A tool structure can be effectively and hermetically connected with a pressure sensor, an air inlet channel pressure test and a sensor test platform.
4. A switching cable is of a one-to-four structure, and can achieve simultaneous connection of an air inlet channel pressure test and sensor test platform and 4 paths of pressure sensors.
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. It is obvious to those skilled in the art that various modifications and variations can be made within the scope of the claims and the technical scope of the present invention.
Claims (7)
1. The utility model provides an intake duct pressure sensor's parallel performance detecting system of multichannel which characterized in that: the device comprises a pressure control air source, a plurality of tightness detection tools, a T-shaped groove working platform, a stabilized voltage power supply and a control unit, wherein a plurality of air inlet channel assemblies which are respectively connected with pressure sensors are respectively fixed on the T-shaped groove working platform, each tightness detection tool is fixed on one air inlet channel, each pressure sensor is connected with an air supply branch connected with the pressure control air source by means of one tightness detection tool, the stabilized voltage power supply is respectively electrically connected with each pressure sensor, the control unit is respectively connected with the pressure control air source, the plurality of pressure sensors and the stabilized voltage power supply and used for controlling each part and collecting data, the tightness detection tool comprises a vertical baffle plate, a transverse baffle plate, an ejector rod and a sealing assembly, the vertical baffle plate is welded at one end of the lower surface of the transverse baffle plate, the ejector rod penetrates through the vertical baffle plate and is in a threaded hole arranged on one, the sealing component is used for fixing the sealing component, a connector used for connecting a pressure sensor is arranged on the other side face of the sealing component, and the connector of the pressure sensor is communicated with a pressure control air source connector arranged on the lower surface of the sealing component.
2. The system of claim 1, wherein the system comprises: the sealing detection tool is characterized by further comprising a supporting plate, the supporting plate is welded to the other end of the lower surface of the transverse baffle plate through a base plate, the supporting plate is a square plate, 8 phi 6 through holes are formed in the frame of the supporting plate, and the sealing detection tool is fixed on the air inlet channel through 8M 5X16 screws and M5 threaded holes in the air inlet channel.
3. The system for detecting the parallel performance of the air intake duct pressure sensor according to claim 1 or 2, wherein: the number of the air inlet channel assemblies is four.
4. A multichannel parallel performance detection method of an air inlet channel pressure sensor is characterized by comprising the following steps: is a method suitable for use in a test system according to any one of claims 1 to 3, comprising:
step one, respectively connecting a plurality of pressure sensors with a plurality of air inlet channel assemblies in a one-to-one correspondence manner, and respectively fixing the plurality of air inlet channel assemblies on a T-shaped groove working platform;
step two, installing a sealing detection tool on each air inlet channel assembly;
thirdly, communicating each pressure sensor with the corresponding air supply branch through the tightness detection tool on the air inlet channel assembly;
correspondingly connecting the control unit with the gas supply control branch, the power supply control branch and the data acquisition branch respectively;
and fifthly, detecting the performance of the pressure sensor, supplying power to each sensor, supplying gas to each gas supply branch, collecting data, comparing, judging and printing a result.
5. The method for detecting the multichannel parallel performance of the air inlet channel pressure sensor as claimed in claim 4, wherein:
and step one, connecting the four pressure sensors with one air inlet channel assembly respectively, and fixing the four air inlet channel assemblies connected with the pressure sensors on the T-shaped groove working platform side by side.
6. The method for detecting the multichannel parallel performance of the intake duct pressure sensor according to claim 5, wherein: the four pressure sensors are respectively communicated with the four gas supply branches connected with the pressure control gas source in a one-to-one correspondence manner by means of a sealing detection tool.
7. The method for detecting the multichannel parallel performance of the intake duct pressure sensor according to any one of claims 4 to 6, wherein:
the fifth step comprises the following steps:
step 1, detecting the sealing property of the joint of the pressure sensor and the measuring pipe: simultaneously outputting nitrogen gas of 0.70-0.1MPa to each pressure sensor, then maintaining the pressure for 5min, judging that the sealing performance is good if the pressure drop is not more than 0.01MPa, and turning to the step 2;
step 2, detecting the performance of the pressure sensor: the nitrogen gas of 0.10MPa, 0.20MPa, 0.40MPa, 0.60MPa and 0.80MPa is provided for each gas supply branch in a grading way, meanwhile, the control unit controls the voltage-stabilized power supply to input +9V voltage to each pressure sensor respectively, the control unit collects voltage signals output by each pressure sensor, compares the voltage signals with pre-edited judgment data and judges the qualification, and finally, reports are printed and output automatically.
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| CN109443605B (en) * | 2018-12-14 | 2023-09-29 | 上海三原电缆附件有限公司 | Device and method for detecting pressure of insulation interface between rubber prefabricated part and cable |
| CN110702335A (en) * | 2019-08-30 | 2020-01-17 | 广州文冲船厂有限责任公司 | Debugging device and debugging method for detecting air tightness of pressure sensing device |
| CN110440982A (en) * | 2019-09-16 | 2019-11-12 | 大唐半导体科技有限公司 | A kind of full-automatic control system for the calibration of air compressor machine sensor parameters |
| CN113984296A (en) * | 2021-10-12 | 2022-01-28 | 珠海格力智能装备有限公司 | Air tightness detection device and control method thereof |
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