Pressure accumulator pressure maintaining test device and method

Abstract

The application relates to a pressure accumulator pressure maintaining test device and method, which comprises a pressure accumulator pressure maintaining tester body, a pressure sensor connecting cable and an environment sensor connecting cable. The pressure accumulator pressure maintaining tester body receives voltage data V1 collected at a plurality of preset time nodes, environment temperature and air pressure data. The environment temperature and air pressure data collected for the first time are used as the reference environment condition. The voltage data V1 collected at other time nodes is converted into voltage values V2' under the reference environment condition. The voltage data V1 collected for the first time and the voltage values V2' of other time nodes obtained through conversion are all converted into corresponding pressure values. The absolute values of the pressure value difference between other time nodes and the pressure value corresponding to the first collection are calculated respectively. If the absolute values of the difference are all less than the allowable error, the pressure maintaining capability of the measured pressure accumulator is qualified. The periodic and automatic collection of pressure and environment data in the pressure accumulator pressure maintaining test process is realized, and manual processing of the collected data is not needed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pressure maintaining test and test, and relates to a pressure accumulator pressure maintaining test device and method. BACKGROUND

[0002] The pressure accumulator is an important product for eliminating POGO vibration on a carrier rocket, is usually assembled by a diaphragm box assembly and a multi-pass shell, wherein the diaphragm box assembly can play the roles of pressure-displacement conversion, energy transmission, sealing, medium isolation, volume compensation and the like, and is an indispensable element in the field of aerospace, so that a special test instrument is required to test the pressure maintaining capability thereof.

[0003] At present, in order to detect the pressure maintaining capability of the pressure accumulator, a traditional detection instrument is usually adopted, the operation personnel need to read the display data of the detection instrument periodically, manually record, and the environmental temperature, atmospheric pressure and other environmental data still need to be manually collected by other auxiliary instruments, so that the objectivity, accuracy and consistency of the data are difficult to guarantee, and the data processing also relies on manual calculation and processing, which is time-consuming, labor-consuming and low in efficiency. Therefore, it is necessary to develop a new portable pressure accumulator pressure maintaining test device and corresponding data acquisition and analysis software to realize automatic acquisition, transmission and intelligent analysis of the pressure test related data of the pressure accumulator product. SUMMARY

[0004] The technical problem solved by the application is to overcome the deficiencies of the prior art, propose a pressure accumulator pressure maintaining test device and method, realize periodic and automatic acquisition of pressure sensor data and pressure maintaining test environmental data in the pressure maintaining test process of the pressure accumulator, solve real-time monitoring, objective recording, multi-dimensional intelligent analysis and output of a pressure accumulator pressure maintaining test report in a format required by a user and the like.

[0005] The technical solution of the application is a pressure accumulator pressure maintaining test device, which comprises a pressure accumulator pressure maintaining test instrument body, a pressure sensor connecting cable and an environmental sensor connecting cable.

[0006] The pressure sensor connecting cable is divided into several groups, each group is a one-way eight-way connecting cable, one end of the one-way connecting cable is connected with the pressure accumulator pressure maintaining test instrument body, and the other eight-way ends can be connected with pressure sensors of the measured pressure accumulator, so that voltage data of the pressure sensors of eight measured pressure accumulators can be collected at the same time.

[0007] One end of the environmental sensor connecting cable is connected with the pressure accumulator pressure maintaining test instrument body, and the other end is connected with an atmospheric pressure and temperature sensor, so that temperature and pressure data of the environment where the measured pressure accumulator is located are collected and transmitted to the pressure accumulator pressure maintaining test instrument body.

[0008] The pressure accumulator pressure maintaining test instrument body receives voltage data collected at a plurality of preset time nodes ​Ambient temperature and air pressure data: Using the first collected ambient temperature and air pressure data as the baseline environmental conditions, voltage data collected at other time points were used. Voltage value converted to reference environmental conditions The voltage data collected for the first time And the voltage values ​​at other time points obtained from the conversion. All values ​​are converted to corresponding pressure values. The absolute value of the difference between the pressure value at other time points and the pressure value at the first acquisition is calculated. If the absolute value of the difference does not exceed the allowable error, the pressure holding capacity of the accumulator under test is qualified.

[0009] Furthermore, the method for converting voltage values ​​into corresponding pressure values ​​is as follows:

[0010]

[0011] in, p 1 represents the equivalent pressure value of the voltage data at the desired time point under reference environmental conditions; p 0 represents the zero pressure value; when calculating the pressure collected for the first time, The voltage data collected for the first time When calculating the pressure at other time points, The voltage values ​​at other time points obtained through conversion , V This is the zero-point value of the pressure sensor voltage.

[0012] Furthermore, it also includes a printer connection cable, one end of which is connected to the accumulator pressure holding tester body, and the other end is connected to the printer, ensuring that the test data of the accumulator pressure holding tester body is output in a controlled manner.

[0013] Furthermore, the accumulator pressure holding tester body is equipped with several pressure data acquisition aviation plug females, one environmental data acquisition aviation plug female, and one printed aviation plug female.

[0014] Furthermore, one end of the pressure sensor connection cable is soldered with a male aviation plug for connection to the female aviation plug for pressure data acquisition, and each of the eight ends is soldered with a female aviation plug for connection to the male aviation plug of the pressure sensor of the accumulator under test.

[0015] Furthermore, both ends of the environmental sensor connection cable are soldered with male aviation plugs, which are respectively connected to the female aviation plug for environmental data acquisition and the female aviation plug for atmospheric pressure and temperature sensors.

[0016] Furthermore, one end of the printing connection cable is soldered with an aviation plug male connector for connection to the printing aviation plug female connector, and the other end is matched with the printer interface.

[0017] Furthermore, the accumulator pressure holding tester also has functions such as equipment monitoring, historical data measurement, system settings, test task management, and network communication.

[0018] A method for testing the pressure holding capacity of an accumulator includes the following steps:

[0019] Convert the current accumulator pressure sensor output voltage data into a voltage value under the reference environmental conditions for pressure holding test;

[0020] The voltage data collected initially and the voltage values ​​under the converted reference environmental conditions were converted into pressure values.

[0021] The pressure values ​​obtained during the test are compared with the pressure values ​​collected in the first pressure holding test, and the absolute value of the difference is output. If the fluctuation range does not exceed the allowable error, the pressure holding capacity of the accumulator under test is qualified; otherwise, it is unqualified.

[0022] Save the collected pressure values, generate a test data report according to the user-defined data report format, and output the accumulator pressure holding test report.

[0023] The advantages of this invention compared to the prior art are:

[0024] (1) The present invention designs a complete set of accumulator pressure holding test data acquisition device, which can simultaneously collect 24 channels of accumulator product pressure sensor data and pressure holding test environment data (temperature, humidity, atmospheric pressure) according to the user-defined acquisition cycle, perform periodic automatic objective acquisition, real-time monitoring and objective recording, eliminate the hidden dangers of misreading, misjudgment and misrecording, and solve the problem that the previous accumulator pressure holding test could not be arranged across weekends or holidays;

[0025] (2) The accumulator pressure holding test software of the present invention can provide real-time prompts to the user on whether the test process is normal by changing the color, based on real-time monitoring and processing of the collected environmental data and sensor voltage data;

[0026] (3) The accumulator pressure holding test software of the present invention can cover the usage requirements of various types of launch vehicles equipped with accumulators for pre-installation testing, zero-position testing, pressure holding test and other type-related tests, and can be used in one machine for multiple purposes;

[0027] (4) The data analysis method of the present invention automatically converts and processes the collected sensor voltage data, automatically determines whether the accumulator's pressure holding capacity in the test is qualified, and outputs a test report in a user-preset format, without the need for manual processing of the collected data.

[0028] (5) The accumulator pressure holding tester of the present invention also has reserved a corresponding hardware interface for data transmission, which provides the corresponding network capability for subsequent accumulator pressure holding test. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an accumulator pressure holding test device according to an embodiment of the present invention;

[0030] In the diagram: 1-Accumulator pressure holding tester body, 2-Pressure sensor connection cable, 3-Environmental sensor connection cable, 4-Printer connection cable. Detailed Implementation

[0031] The present invention will be further described below with reference to the embodiments.

[0032] Example 1

[0033] like Figure 1 As shown, an accumulator pressure holding test device in this embodiment includes an accumulator pressure holding tester body 1, a pressure sensor connection cable 2, an environmental sensor connection cable 3, and a printer connection cable 4.

[0034] The pressure sensor connection cable is divided into 3 groups, each group consisting of one cable with eight connecting lines. One end connects to the main body 1 of the accumulator pressure holding tester, and each of the eight connecting lines can connect to the pressure sensor of the accumulator under test, realizing the pressure sensor voltage data of the eight accumulators under test. Simultaneous data collection; in this embodiment, the pressure sensor connection cable can connect 24 accumulators at once and transmit their pressure sensor voltage data to the accumulator pressure holding tester body.

[0035] One end of the environmental sensor connection cable 3 is connected to the main body 1 of the accumulator pressure holding tester, and the other end is connected to the atmospheric pressure and temperature sensor to collect the temperature and air pressure data of the environment where the accumulator under test is located and transmit them to the main body of the accumulator pressure holding tester.

[0036] One end of the printing connection cable 4 is connected to the accumulator pressure holding tester body 1, and the other end is connected to the printer to ensure that the test data of the accumulator pressure holding tester body 1 is output in a controlled manner.

[0037] The accumulator voltage holding tester body 1 receives voltage data collected at multiple preset time points. Ambient temperature and air pressure data: Using the first collected ambient temperature and air pressure data as the baseline environmental conditions, voltage data collected at other time points were used. Voltage value converted to reference environmental conditions The voltage data collected for the first time And the voltage values ​​at other time points obtained from the conversion. All values ​​are converted to corresponding pressure values. The absolute value of the difference between the pressure value at other time points and the pressure value at the first acquisition is calculated. If the absolute value of the difference does not exceed the allowable error, the pressure holding capacity of the accumulator under test is qualified.

[0038] The method for converting voltage values ​​into corresponding pressure values ​​is as follows:

[0039]

[0040] in, p 1 represents the equivalent pressure value of the voltage data at the desired time point under reference environmental conditions; p 0 represents the zero pressure value; when calculating the pressure collected for the first time, The voltage data collected for the first time When calculating the pressure at other time points, The voltage values ​​at other time points obtained through conversion , V This is the zero-point value of the pressure sensor voltage.

[0041] In this embodiment, the accumulator pressure holding tester body 1 is equipped with three pressure data acquisition aviation plug females, one environmental data acquisition aviation plug female, and one printed aviation plug female.

[0042] One end of the pressure sensor connection cable 2 is welded with a male aviation plug for connection to the female aviation plug for pressure data acquisition. Each of the eight ends is welded with a female aviation plug for connection to the male aviation plug of the pressure sensor of the accumulator under test.

[0043] Both ends of the environmental sensor connection cable 3 are soldered with male aviation plugs, which are respectively connected to the female aviation plug for environmental data acquisition and the female aviation plug for atmospheric pressure and temperature sensors.

[0044] One end of the printing connection cable 4 is soldered with an aviation plug male connector for connection to the printing aviation plug female connector, and the other end is matched with the printer interface.

[0045] Furthermore, the accumulator pressure holding tester body 1 also has functions such as equipment monitoring, historical data measurement, system settings, test task management, and network communication.

[0046] The equipment monitoring function is mainly used in accumulator pressure holding tests to display the current atmospheric pressure, temperature, and humidity; the status and current voltage value of the accumulator pressure sensor connected to the accumulator pressure holding tester; and the power supply to the accumulator pressure sensor can be switched on and off via software to ensure its service life. The monitoring interface can also use color indicators to show whether the accumulator pressure data is within the normal range.

[0047] The historical data measurement function is mainly used for the statistics, display, and export of past accumulator pressure holding test data. It allows for single and parallel queries by measurement type, task name, accumulator pressure sensor number, operator, etc. Exported data can be categorized by product type, including pre-installation testing, zero-point testing, and pressure holding test data records, and test reports can be output in preset formats.

[0048] The system settings function is mainly used to set basic information such as test type, product model, number of data acquisitions within the test cycle, power-on time of the accumulator pressure sensor before data acquisition, and upper and lower limits of voltage data fluctuation, which can be used quickly when creating a new test task;

[0049] The test task management function is mainly used for setting and managing specific test task information, including specific functions such as creating a new task, starting a task, pausing a task, stopping a task, and terminating a task;

[0050] The network communication function is mainly used to realize the network transmission and remote acquisition of test data for accumulator pressure holding test.

[0051] This invention also proposes a method for testing the pressure holding capacity of an accumulator, comprising the following steps:

[0052] Convert the current accumulator pressure sensor output voltage data into a voltage value under the reference environmental conditions for pressure holding test;

[0053] The voltage data collected initially and the voltage values ​​under the converted reference environmental conditions were converted into pressure values.

[0054] The pressure values ​​obtained during the test are compared with the pressure values ​​collected in the first pressure holding test, and the absolute value of the difference is output. If the fluctuation range does not exceed the allowable error, the pressure holding capacity of the accumulator under test is qualified; otherwise, it is unqualified.

[0055] Save the collected pressure values, generate a test data report according to the user-defined data report format, and output the accumulator pressure holding test report.

[0056] Taking a single pressure holding test as an example, the operation process of the accumulator pressure holding test device is explained in detail:

[0057] Open the cable storage compartment cover of the accumulator pressure holding tester and take out the pressure sensor connection cable 2;

[0058] Open the sliding door of the atmospheric pressure and temperature sensor storage compartment of the accumulator pressure holding tester and take out the environmental sensor connection cable 3.

[0059] Open the cable storage compartment cover of the accumulator pressure holding tester and take out the matching AC220V three-prong power cable.

[0060] Connect the eight ends of the pressure sensor connection cable 2 to the male aviation connector of the pressure sensor on the accumulator product to be tested, and connect the other end to the corresponding female aviation connector on the main body 1 of the accumulator pressure holding tester. Ensure that the connection is secure and good, and insert it according to the red mark.

[0061] In this embodiment, four female aviation plugs in the eight-ended end of the pressure sensor connection cable 2 are respectively connected to the male aviation plugs of the pressure sensors on four accumulator products.

[0062] The environmental sensor connection cable 3 connects to the accumulator pressure holding tester body 1. Environmental data acquisition aviation plug female end, ensure a firm and good connection, align with the red mark and insert;

[0063] Print the aviation plug end of the connecting cable 4 to connect to the accumulator pressure holding tester body 1. Print the aviation plug female end, ensure a firm and good connection, and insert it by aligning with the red mark.

[0064] Connect the power supply to the main body 1 of the accumulator pressure holding tester;

[0065] Press the main power switch on the main panel of the accumulator pressure holding tester. After powering on, the green power indicator light next to the button will stay on, and the red data indicator light will flash according to the data storage and retrieval status. The system will then directly enter the standby interface of the accumulator pressure holding test software.

[0066] Press the power switch of the atmospheric pressure and temperature sensor connected to the environmental sensor connection cable 3 to power it on, and observe whether the data displayed on its built-in LCD matches the temperature, humidity, and atmospheric pressure on the monitoring interface of the accumulator pressure holding test software.

[0067] Click on System Settings to enter the System Settings interface. Enter basic configuration information such as sensor model and type, test type (pre-installation test, zero-point test, pressure holding test), number of data acquisitions, data acquisition interval, and accumulator pressure sensor power-on time before data acquisition.

[0068] In this embodiment, the acquisition type is set to pressure holding test, the acquisition interval is set to 8 hours, the accumulator pressure sensor is powered on for 1 minute before acquisition, and the sensor model is silicon pressure sensor.

[0069] Click the upper left corner of the standby interface of the accumulator pressure holding test software. In the pop-up interface, select the connected pressure sensor cable connector number, and then enter the sensor number, calibration period, room temperature voltage sensitivity, and room temperature zero output in sequence. In the meter header, enter the measurement task name, measurement type, product model, product drawing number, and operator.

[0070] In this embodiment, the sensor number, calibration period, room temperature voltage sensitivity, and room temperature zero-point output are taken from the accumulator pressure sensor's factory certificate of conformity; the remaining information is filled in truthfully according to the test requirements.

[0071] Click "Start Measurement" in the lower left corner of the current interface, and the system will automatically return to the real-time sensor monitoring interface. The sensor you just entered will now be green, indicating it is in operation.

[0072] The test is conducted according to the preset test time, acquisition frequency and other parameters. No manual intervention is required during the test. Just keep the accumulator pressure holding tester powered stably. The accumulator pressure holding tester will automatically record the relevant data according to the preset parameters.

[0073] After the experiment ends, clicking on historical measurement data will allow you to view detailed data records during the experiment, but these cannot be manually modified.

[0074] On the historical measurement data interface, clicking the export button will generate the corresponding test report according to the task name or product drawing number and test type, in the preset report format.

[0075] In this embodiment, a pressure holding test report for a certain type of accumulator product for a launch vehicle is finally generated. The report includes the operation content, data records of the pressure holding test process, the maximum fluctuation value after excluding the influence of temperature, and the test conclusions.

[0076] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

[0077] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A pressure holding test device for an accumulator, characterized in that, Includes the accumulator pressure holding tester body, pressure sensor connection cable, and environmental sensor connection cable; The pressure sensor connection cables are divided into several groups, each group consisting of one cable with eight connecting cables. One cable connects to the main body of the accumulator pressure holding tester, and each of the eight connecting cables can connect to the pressure sensor of the accumulator under test, enabling the collection of pressure sensor voltage data from eight accumulators under test. Simultaneous collection; One end of the environmental sensor connection cable is connected to the main body of the accumulator pressure holding tester, and the other end is connected to the atmospheric pressure and temperature sensor to collect temperature and air pressure data of the environment in which the accumulator under test is located and transmit them to the main body of the accumulator pressure holding tester. The accumulator voltage holding tester receives voltage data collected at multiple preset time points. Ambient temperature and air pressure data: Using the first collected ambient temperature and air pressure data as the baseline environmental conditions, voltage data collected at other time points were used. Voltage value converted to reference environmental conditions The voltage data collected for the first time And the voltage values ​​at other time points obtained from the conversion. All values ​​are converted to corresponding pressure values. The absolute value of the difference between the pressure value at other time points and the pressure value at the first acquisition is calculated. If the absolute value of the difference does not exceed the allowable error, the pressure holding capacity of the accumulator under test is qualified.

2. The accumulator pressure holding test device according to claim 1, characterized in that, The method for converting voltage values ​​to corresponding pressure values ​​is as follows: in, p 1 represents the equivalent pressure value of the voltage data at the desired time point under reference environmental conditions; p 0 represents the zero pressure value; when calculating the pressure collected for the first time, The voltage data collected for the first time When calculating the pressure at other time points, The voltage values ​​at other time points obtained through conversion , V This is the zero-point value of the pressure sensor voltage.

3. The accumulator pressure holding test device according to claim 1, characterized in that, It also includes a printer connection cable, one end of which is connected to the accumulator pressure holding tester body and the other end is connected to the printer, ensuring that the test data of the accumulator pressure holding tester body is output in a controlled manner.

4. The accumulator pressure holding test device according to claim 3, characterized in that, The accumulator pressure holding tester is equipped with several pressure data acquisition aviation plugs (female), one environmental data acquisition aviation plug (female), and one printed aviation plug (female).

5. The accumulator pressure holding test device according to claim 4, characterized in that, One end of the pressure sensor connection cable is soldered with a male aviation plug for connection to the female aviation plug for pressure data acquisition. Each of the eight ends is soldered with a female aviation plug for connection to the male aviation plug of the pressure sensor of the accumulator under test.

6. The accumulator pressure holding test device according to claim 4, characterized in that, Both ends of the environmental sensor connection cable are soldered with male aviation plugs, which are respectively connected to the female aviation plug for environmental data acquisition and the female aviation plug for atmospheric pressure and temperature sensors.

7. The accumulator pressure holding test device according to claim 4, characterized in that, One end of the printing connection cable is soldered with an aviation plug male connector for connection to the printing aviation plug female connector, and the other end is matched with the printer interface.

8. The accumulator pressure holding test device according to claim 1, characterized in that, The accumulator pressure holding tester also features equipment monitoring, historical data measurement, system settings, test task management, and network communication functions.

9. A method for testing the pressure holding capacity of an accumulator based on the device according to any one of claims 1 to 8, characterized in that, Includes the following steps: Convert the current accumulator pressure sensor output voltage data into a voltage value under the reference environmental conditions for pressure holding test; The voltage data collected initially and the voltage values ​​under the converted reference environmental conditions were converted into pressure values. The pressure values ​​obtained during the test are compared with the pressure values ​​collected in the first pressure holding test, and the absolute value of the difference is output. If the fluctuation range does not exceed the allowable error, the pressure holding capacity of the accumulator under test is qualified; otherwise, it is unqualified. Save the collected pressure values, generate a test data report according to the user-defined data report format, and output the accumulator pressure holding test report.

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