One-to-multiple gas exhaust joint with valve, multi-pressure sensor calibration system and calibration method

Abstract

The invention relates to the technical field of sensor calibration, in particular to a one-to-multiple valve gas exhaust connector, a multi-pressure sensor calibration system and a multi-pressure sensor calibration method, and the one-to-multiple valve gas exhaust connector comprises a gas inlet connector used for being connected with a gas source pump; the connecting pipe is connected with the air inlet connector and enables the pressure of an air source to be transmitted into the connecting pipe; one end of each gas exhaust connector is independently connected to different positions of the connecting pipe, each gas exhaust connector is provided with a valve, and each valve is used for controlling whether the corresponding gas exhaust connector transmits the pressure of the gas source outwards or not; wherein the air inlet joint and the plurality of air exhaust joints are flexible hoses with different lengths or the same length so as to facilitate connection. According to the one-to-multiple gas exhaust connector with the valve, one or more gas exhaust connectors can be assembled together to achieve one-to-multiple paths, and the one-to-multiple paths can be independently controlled to be connected and disconnected.

Description

Technical Field

[0001] The present application relates to the technical field of sensor calibration, and particularly to a one-to-many valve air discharge joint, a multi-pressure sensor calibration system, and a calibration method. Background Art

[0002] When calibrating a pressure sensor during the performance test of an existing aeroengine, a manual one-by-one calibration method is adopted. By manually giving multiple pressure values, the corresponding voltage values are obtained using an acquisition module and an acquisition program, and the given pressure values and the corresponding voltage values are recorded one by one. Then, a calibration curve of the pressure sensor is obtained by curve fitting the pressure values and the voltage values.

[0003] The existing technology is time-consuming and laborious for calibrating a large number of sensors. Generally, a large number of sensors are used in the performance test of an aeroengine. Taking a certain type of turbofan engine as an example, the number of pressure sensors used in the performance test is close to 60. If each sensor is calibrated one by one and ten points are calibrated for each sensor, the calibration workload is very large, and it is easy to make mistakes when manually recording a large number of calibration data values. Summary of the Invention

[0004] Embodiments of the present application provide a one-to-many valve air discharge joint, a multi-pressure sensor calibration system, and a calibration method to solve the problems existing in the related technology. The technical solutions are as follows: Embodiments of the present application provide a one-to-many valve air discharge joint, including: An air inlet joint for connecting to an air source pump; A connecting pipe connected to the air inlet joint to transfer the pressure of the air source into the connecting pipe; A plurality of air discharge joints, one ends of the plurality of air discharge joints are respectively and independently connected to different positions of the connecting pipe, and each air discharge joint is provided with a valve, and the valve is used to control whether the air source pressure is transmitted outward through the air discharge joint where it is located; Wherein, the air inlet joint and the plurality of air discharge joints are flexible hoses of different lengths or the same length for easy connection.

[0005] In one embodiment, a splicing joint is provided at the middle position of the connecting pipe for connecting the plurality of air discharge joints.

[0006] In one embodiment, the valve is a manual valve.

[0007] In one embodiment, splicing joints are provided at both ends of the valve on the plurality of air discharge joints.

[0008] In one embodiment, the plurality of air discharge joints are respectively connected to the air inlet joint of another one-to-many valve air discharge joint through hoses.

[0009] The embodiment of the present application also provides a multi-pressure sensor calibration system, including: A gas source pump; The multi-outlet valve gas discharge joint as described above, and one or more groups of the multi-outlet valve gas discharge joints are used in superposition; A test panel with multiple pressure sensors; An acquisition module for acquiring data of multiple pressure sensors; A calibration unit for acquiring and processing data of multiple pressure sensors in the acquisition module.

[0010] In one embodiment, the calibration unit includes a calibration computer running calibration software and a serial-port-to-Ethernet-port conversion module. The calibration computer is connected to the acquisition module through the serial-port-to-Ethernet-port conversion module, and the serial-port-to-Ethernet-port conversion module is used to convert data of multiple pressure sensors transmitted through the serial port into data transmitted through the Ethernet port for the calibration computer to acquire and process.

[0011] In one embodiment, the calibration computer is further connected to the gas source pump to acquire the working state of the gas source pump and control the pressure value pumped out by the gas source pump.

[0012] The embodiment of the present application also provides a calibration method using the multi-pressure sensor calibration system as described above, including: S10: Connect the other ends of multiple gas discharge joints to multiple pressure sensors respectively, and open the valves on each gas discharge joint. Among them, the multiple pressure sensors are of the same type and the same range; S20: Set the pressure value output by the gas source pump and control the gas source pump to open; S30: After the pressure value is stable, save the calibrated pressure value read through the acquisition module; S40: Adjust the pressure value in step S20, save the new calibrated pressure value in step S30, and perform cyclic operations until the calibration is completed.

[0013] In one embodiment, after the calibration is completed, it further includes: S50: Display the saved multiple calibrated pressure values and obtain a calibration curve.

[0014] The advantages or beneficial effects in the above technical solutions at least include: The multi-outlet air exhaust joint with valve in the embodiments of the present application is a pressure transmission joint that can use one or more components assembled together to achieve multi-outlet and can individually control the on / off of each single path. The joint made of flexible hose is more convenient for installation. The multi-pressure sensor calibration system and calibration method provided by the embodiments of the present application have a collection module for automatically collecting the pressures of multiple sensors and a calibration computer, which can complete the calibration of multiple sensors of the same type and the same range at one time, greatly saving time and labor costs, and is not prone to errors compared with the traditional manual reading. Since each air exhaust joint is equipped with a valve, the pipeline connecting the pressure sensor can be opened, which can make the output pressure stable.

[0015] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will become apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the drawings, unless otherwise specified, the same reference numerals throughout the several views represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0017] Figure 1 It is a schematic diagram of the multi-outlet air exhaust joint with valve in the embodiments of the present application; Figure 2 It is a schematic block diagram of the multi-pressure sensor calibration system in the embodiments of the present application; Figure 3 It is a multi-outlet air exhaust device with channel selection in the embodiments of the present application Figure 4 It is an interface diagram of the pressure sensor calibration program in the embodiments of the present application; Figure 5 It is a flowchart of the calibration method of the multi-pressure sensor calibration system in the embodiments of the present application; Figure 6 It is a software interface diagram for displaying the calibration results of the pressure sensor in the embodiments of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0019] See Figure 1, which shows a multi-outlet valve air exhaust joint 200 of a preferred embodiment of the first embodiment of the present application, as Figure 1 shown, including: An air inlet joint 1 for connecting to an air source pump 100; when the air source pump 100 is working, the air pressure signal output by the air source pump 100 can enter the multi-outlet valve air exhaust joint 200 through the air inlet joint; A connecting pipe 2, connected to the air inlet joint 1 and transmitting the pressure of the air source into the connecting pipe 2; wherein the connecting pipe 2 has a hollow cavity and accommodates gas; A plurality of air exhaust joints 3, one ends of the plurality of air exhaust joints 3 are respectively independently connected to different positions of the connecting pipe 2, and each air exhaust joint 3 is provided with a valve 4, and the valve 4 is used to control whether the air source pressure is transmitted outward through the air exhaust joint 3 where it is located; Wherein, the air inlet joint 1 and the plurality of air exhaust joints 3 are flexible hoses of different lengths or the same length for easy connection. For the convenience of connecting to a pressure sensor or the air source pump 100, the length of the flexible hose can be not limited, and those skilled in the art can adjust it according to the actual situation. Among them, the air inlet joint 1, the connecting pipe 2, the plurality of air exhaust joints 3 and the valve 4 can all be connected through splicing joints, and among them, the splicing joints can also be hoses and are connected in a sleeved manner.

[0020] In an embodiment, the air exhaust joint 3 can be 8, that is, an eight-outlet air exhaust joint 3 is formed.

[0021] In an embodiment, a splicing joint is arranged at the middle position of the connecting pipe 2 connecting the plurality of air exhaust joints 3, and can be disassembled and assembled at will to expand more branch air paths.

[0022] In an embodiment, the valve 4 is a manual valve. It is convenient to manually open the valve. Of course, those skilled in the art can realize automatic opening and closing by changing it into the form of an electromagnetic valve. The implementation method using a manual valve is for cost consideration and to facilitate observing which air exhaust joint 3 is connected to the pressure sensor for adjustment. It is only a preferred method of the embodiments of the present application and does not limit the present application.

[0023] In an embodiment, splicing joints are arranged at both ends of the valve 4 on the plurality of air exhaust joints 3 for connecting bifurcated pipes, valves or hoses to facilitate the realization of multi-path expansion.

[0024] As a preferred embodiment, multiple one-to-many valved air exhaust connectors 200 can also be connected to the air inlet connector of another group of one-to-many valved air exhaust connectors 200 through hoses. That is, multiple one-to-many valved air exhaust connectors 200 can be cascaded, and the number of pressure sensors that can be connected can be expanded through cascading. For example, 8 one-to-eight valved air exhaust connectors (i.e., eight air exhaust connectors) are cascaded, and the air exhaust connectors of the upper stage are respectively connected to the air inlet connectors of the lower stage through hoses, so that 7*8=56 air exhaust connectors for connecting pressure sensors can be formed.

[0025] The present application also provides a multi-pressure sensor calibration system. Figure 2 As shown, including: Air source pump 100; As in the one-to-many valved air exhaust connector 200 in the above embodiment, the one-to-many valved air exhaust connector is used as one or more groups in a stacked manner; A test panel 300 having a plurality of pressure sensors; wherein the test panel is used to fix a plurality of pressure sensors, for example, 56 pressure sensors, wherein the plurality of pressure sensors are preferably pressure sensors of the same type and range.

[0026] A collection module 400 for collecting data from multiple pressure sensors is provided; wherein the collection module 400 can collect pressure values ​​of multiple pressure sensors in parallel or in a time-sharing manner, and multiple collection modules 400 can also be selected to be used. For example, each collection module can collect sensor data from 8 channels, and then 7 collection modules can be used to realize data collection for 56 pressure sensors; if only one collection module 400 is used, the collection can be carried out in a time-sharing manner, and a path switching module for time-sharing collection can be used to realize it.

[0027] A calibration unit 500 is used to acquire and process the data of the multiple pressure sensors in the acquisition module 400 .

[0028] In one embodiment, the calibration unit 500 includes a calibration computer running calibration software and a serial port to network port conversion module, such as Figure 3 As shown, it is a one-point-multiple gas exhaust device with channel selection in the embodiment of the present application, wherein the calibration calculation is connected to the acquisition module through the serial port network port conversion module, and the serial port network port conversion module is used to convert the data of multiple pressure sensors transmitted through the serial port into data transmitted through the network port for the calibration computer to obtain and process. Among them, the calibration software can be used to select which pressure sensors need to be calibrated, and then a selection box is displayed in front of the pressure sensor, and the valve on the gas exhaust connector of the pressure sensor in the selected state needs to be opened, wherein the calibration computer controls the opening or closing of the solenoid valve 4 through the gas path selection control information, thereby realizing the control of whether to calibrate multiple pressure sensors.

[0029] In one embodiment, the calibration computer is also connected to the gas source pump 100 to obtain the working state of the gas source pump 100. The calibration computer can output a pneumatic control signal to the pressure regulating device and output a gas source working control signal to the gas source, thereby realizing the control of the pressure value pumped out by the pressure regulating device. As Figure 4 shown, it is the interface diagram of the pressure sensor calibration program in the embodiment of the present application, and can also be used to control the opening and closing of the gas source pump 100 and set the given value of the pressure for the gas source pump 100 to press, and can also read the actual value of the actual pressure of the gas source pump 100. For example, in the input box of the given value of the gas source pump 100, the desired given values are input in sequence according to the range of the pressure sensor to achieve calibration.

[0030] The embodiment of the present application also provides a calibration method using the multi-pressure sensor calibration system as described above, as Figure 5 shown, including: S10. Connect the other ends of multiple air exhaust connectors to multiple pressure sensors respectively, and open the valves on each air exhaust connector. Among them, the multiple pressure sensors are pressure sensors of the same type and the same range; S20. Set the pressure value output by the gas source pump and control the gas source pump to open; S30. After the pressure value is stable, save the calibrated pressure value read by the acquisition module; S40. Adjust the pressure value in step S20, save the new calibrated pressure value in step S30, and perform cyclic operations until the calibration is completed.

[0031] In one embodiment, after the calibration is completed, it further includes: S50. Display the saved multiple calibrated pressure values and obtain a calibration curve. As Figure 6 shown, it is the software interface for displaying the pressure sensor calibration results in the embodiment of the present application, which can realize the display of multiple calibration curves, and can select and export the calibration curve data of different pressure sensors when necessary.

[0032] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0034] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of various changes or substitutions, and these should all be covered within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

1. One-to-many valve-equipped air exhaust joint, characterized in that, Comprising: An air inlet joint for connecting with an air source pump; A connecting pipe connected to the air inlet joint and enabling the pressure of the air source to be transmitted into the connecting pipe; A plurality of air exhaust joints, one ends of the plurality of air exhaust joints are respectively and independently connected to different positions of the connecting pipe, and each air exhaust joint is provided with a valve, and the valve is used to control whether the air exhaust joint transmits the pressure of the air source outwards; Wherein, the air inlet joint and the plurality of air exhaust joints are flexible hoses of different lengths or the same length for facilitating connection.

2. The one-to-many valve-equipped air exhaust joint according to claim 1, characterized in that, A splicing joint is arranged at the middle position of the connecting pipe for connecting the plurality of air exhaust joints.

3. The one-to-many valve-equipped air exhaust joint according to claim 1, characterized in that, The valve is a manual valve.

4. The one-to-many valve-equipped air exhaust joint according to claim 1 or 3, characterized in that, Splicing joints are arranged at both ends of the valve on the plurality of air exhaust joints.

5. The one-to-many valve-equipped air exhaust joint according to claim 1, characterized in that, The plurality of air exhaust joints are respectively connected to the air inlet joint of another group of one-to-many air exhaust joints with valves through hoses.

6. Multi-pressure sensor calibration system, characterized in that, Comprising: An air source pump; The one-to-many air exhaust joint with valves according to any one of claims 1-5, and the one-to-many air exhaust joint with valves is used in one group or multiple groups in a stacked manner; A test panel with a plurality of pressure sensors; An acquisition module for acquiring data of the plurality of pressure sensors; A calibration unit for acquiring and processing the data of the plurality of pressure sensors in the acquisition module.

7. The multi-pressure sensor calibration system according to claim 6, characterized in that, The calibration unit includes a calibration computer running calibration software and a serial-port to Ethernet-port conversion module. The calibration computer is connected to the acquisition module through the serial-port to Ethernet-port conversion module, and the serial-port to Ethernet-port conversion module is used to convert the data of the plurality of pressure sensors transmitted through the serial port into data transmitted through the Ethernet port for the calibration computer to acquire and process.

8. The multi-pressure sensor calibration system according to claim 7, characterized in that, The calibration computer is further connected to the air source pump to acquire the working state of the air source pump and control the pressure value pumped out by the air source pump.

9. A calibration method using the multi-pressure sensor calibration system according to any one of claims 6 - 8, characterized in that, Comprising: S10: Connect the other ends of the plurality of air exhaust joints to a plurality of pressure sensors respectively, and open the valves on each air exhaust joint. Among them, the plurality of pressure sensors are pressure sensors of the same type and the same range; S20: Set the pressure value output by the air source pump and control the air source pump to be turned on; S30: After the pressure value is stable, save the calibrated pressure value read through the acquisition module; S40: Adjust the pressure value in step S20, save the new calibrated pressure value in step S30, and perform cyclic operations until calibration is completed.

10. The calibration method according to claim 9, characterized in that, After calibration is completed, it further includes: S50: Display the saved plurality of calibrated pressure values and obtain a calibration curve.

Images