Pressure accumulator pressure maintaining test device and method

Abstract

The invention relates to an accumulator pressure maintaining test device and method, and the device comprises an accumulator pressure maintaining tester body, a pressure sensor connection cable, and an environment sensor connection cable, and the accumulator pressure maintaining tester body receives voltage data V1, environment temperature, and air pressure data collected according to a plurality of preset time nodes. Taking the environment temperature and air pressure data collected for the first time as a reference environment condition, converting the voltage data V1 collected at other time nodes into a voltage value V2'under the reference environment condition, and converting the voltage data V1 collected for the first time and the converted voltage value V2 'at other time nodes into corresponding pressure values; respectively calculating the absolute value of the difference value between the pressure values corresponding to other time nodes and the pressure value corresponding to the first collection, and if the absolute value of the difference value does not exceed the allowable error, determining that the pressure maintaining capability of the measured pressure accumulator is qualified. Periodic and automatic collection of pressure and environment data in the pressure maintaining test process of the pressure accumulator is achieved, and manual processing of the collected data is not needed.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure-maintaining test and testing, and relates to a pressure-maintaining test device and method for a pressure accumulator. Background Art

[0002] The accumulator is an important product for eliminating POGO vibration on launch vehicles. It is usually composed of a diaphragm assembly and a multi-pass shell. The diaphragm assembly can play the role of "pressure-displacement" conversion, energy transfer, sealing, medium isolation, volume compensation, etc. It is an indispensable component in the aerospace field, so a special tester is required to test its pressure holding ability.

[0003] At present, in order to detect the pressure-maintaining capacity of the accumulator, traditional testers are often used, which require operators to regularly read the display data of the test instrument and record it manually. In addition, environmental data such as ambient temperature and atmospheric pressure still need to be manually collected by other auxiliary instruments. 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-intensive and inefficient. Therefore, it is necessary to develop a new portable accumulator pressure-maintaining test device and corresponding data acquisition and analysis software to realize the automatic collection, transmission and intelligent analysis of accumulator product pressure test related data. Summary of the invention

[0004] The technical problem solved by the present invention is: to overcome the shortcomings of the prior art, to propose an accumulator pressure maintaining test device and method, to realize the periodic and automatic collection of pressure sensor data and pressure maintaining test environment data during the accumulator pressure maintaining test, to solve the problems of real-time monitoring, objective recording, multi-dimensional intelligent analysis and output of accumulator pressure maintaining test report in the format required by the user.

[0005] The technical solution of the present invention is: an accumulator pressure-maintaining test device, including an accumulator pressure-maintaining tester body, a pressure sensor connecting cable, and an environmental sensor connecting cable;

[0006] The pressure sensor connection cables are divided into several groups, each group is a one-way to eight-way connection cable, one-way end is connected to the accumulator pressure tester body, and each of the eight-way ends can be connected to the pressure sensor of the accumulator under test, so as to realize the simultaneous collection of the pressure sensor voltage data V1 of eight accumulators under test;

[0007] One end of the environmental sensor connecting cable is connected to the accumulator pressure tester body, and the other end is connected to the atmospheric pressure temperature sensor to collect the temperature and air pressure data of the environment where the accumulator is tested and transmit them to the accumulator pressure tester body;

[0008] The accumulator pressure maintaining tester body receives voltage data V1, ambient temperature, and air pressure data collected at preset multiple time nodes, takes the ambient temperature and air pressure data collected for the first time as the reference environmental conditions, converts the voltage data V1 collected at other time nodes into a voltage value V2' under the reference environmental conditions, converts the voltage data V1 collected for the first time and the voltage values ​​V2' of other time nodes obtained by conversion into corresponding pressure values, and calculates the absolute value of the difference between the pressure values ​​corresponding to other time nodes and the pressure values ​​corresponding to the first collection respectively. If the absolute value of the difference does not exceed the allowable error, the pressure maintaining capacity of the accumulator under test is qualified.

[0009] Furthermore, the voltage data V1 collected at other time nodes is converted into a voltage value V2' under the reference environmental conditions as follows:

[0010] V2'=[(P1+kV1+V)T2 / T1-P2] / k

[0011] Among them, P1 and P2 are the measured values ​​of air pressure at temperature T1 and temperature T2 respectively, k and V are empirical constants and voltage zero value respectively, V1 is the measured value of voltage at temperature T2, and V2' is the equivalent value of the measured value of voltage at temperature T2 at temperature T1.

[0012] Furthermore, the method for converting the voltage value into the corresponding pressure value is:

[0013] p1=p0+[(V1-V) / V]×p0

[0014] Among them, p1 is the equivalent pressure value of the voltage data at the required time node under the reference environmental conditions; p0 is the zero-position pressure value.

[0015] Furthermore, it also includes a printing connection cable, one end of which is connected to the accumulator pressure maintaining tester body, and the other end is connected to a printer, to ensure that the test data of the accumulator pressure maintaining tester body is output in a controlled manner.

[0016] Furthermore, the accumulator pressure holding tester body is provided with a plurality of pressure data acquisition aviation plug females, an environmental data acquisition aviation plug female, and a printing aviation plug female.

[0017] Furthermore, one end of the pressure sensor connecting cable is welded with a male aviation plug for connecting to the female aviation plug for pressure data acquisition, and each of the eight ends is welded with a female aviation plug for connecting to the male aviation plug of the accumulator pressure sensor under test.

[0018] Furthermore, both ends of the environmental sensor connection cable are welded with aviation plug males, which are respectively connected to the environmental data acquisition aviation plug female and the aviation plug female of the atmospheric pressure and temperature sensor.

[0019] Furthermore, one end of the printing connection cable is welded with a male aviation plug for connecting to the female printing aviation plug, and the other end is matched with the interface of the printer.

[0020] Furthermore, the accumulator pressure maintaining tester body also has the functions of equipment monitoring, historical data measurement, system setting, test task management, and network communication.

[0021] A pressure accumulator pressure maintenance test method comprises the following steps:

[0022] Convert the current accumulator pressure sensor output voltage data into a voltage value under the pressure holding test reference environmental conditions;

[0023] Convert the voltage data collected for the first time and the voltage value under the converted reference environmental conditions into pressure values;

[0024] The multiple pressure values ​​obtained during the test are compared with the corresponding 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 error allowance, the pressure holding capacity of the tested accumulator is qualified, otherwise it is unqualified;

[0025] Save the collected multiple pressure values, generate test data report according to the user-defined data report format, and output the accumulator pressure maintenance test report.

[0026] The beneficial effects of the present invention compared with the prior art are:

[0027] (1) The present invention designs a complete set of accumulator pressure test data acquisition devices, which can simultaneously collect 24 channels of accumulator product pressure sensor data and pressure test environment data (temperature, humidity, atmospheric pressure) according to the collection cycle set by the user, and perform periodic automatic objective collection, real-time monitoring and objective recording, eliminating the hidden dangers of misreading, misjudgment and misrecording, and solving the problem that the accumulator pressure test cannot be arranged across weekends or holidays in the past;

[0028] (2) The accumulator pressure-maintaining test software of the present invention can prompt the user in real time through color changes whether the test progress is normal based on real-time monitoring and processing of the collected environmental data and sensor voltage data;

[0029] (3) The accumulator pressure holding test software of the present invention can meet the requirements of accumulator pre-installation detection, zero position detection, pressure holding test and other types of related tests for several types of launch vehicles equipped with accumulators, and one machine can be used for multiple purposes;

[0030] (4) The data analysis method of the present invention automatically converts and processes the collected sensor voltage data, automatically determines whether the pressure holding capacity of the pressure accumulator under test is qualified, and outputs a test report in a user-preset format, without the need for manual processing of the collected data;

[0031] (5) The accumulator pressure-maintaining tester body of the present invention also reserves a corresponding hardware interface for data transmission, thereby reserving corresponding capabilities for networking of subsequent accumulator pressure-maintaining test experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of a pressure accumulator pressure-maintaining test device according to an embodiment of the present invention;

[0033] In the figure: 1- accumulator pressure holding tester body, 2- pressure sensor connecting cable, 3- environmental sensor connecting cable, 4- printing connecting cable. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the embodiments.

[0035] Example 1

[0036] like Figure 1 As shown, a pressure accumulator pressure holding test device in this embodiment includes a pressure accumulator pressure holding tester body 1, a pressure sensor connecting cable 2, an environmental sensor connecting cable 3 and a printing connecting cable 4;

[0037] The pressure sensor connecting cable 2 is divided into 3 groups, each group is a one-way eight-way connecting cable, one end is connected to the accumulator pressure maintaining tester body 1, and each of the eight ends can be connected to the pressure sensor of the accumulator under test, so as to realize the simultaneous collection of the pressure sensor voltage data V1 of the eight accumulators under test; in this embodiment, the pressure sensor connecting cable can connect 24 accumulators at a time and transmit their pressure sensor voltage data to the accumulator pressure maintaining tester body.

[0038] One end of the environmental sensor connecting cable 3 is connected to the accumulator pressure tester body 1, and the other end is connected to the atmospheric pressure temperature sensor to collect the temperature and air pressure data of the environment where the accumulator is located and transmit them to the accumulator pressure tester body;

[0039] One end of the printing connection cable 4 is connected to the accumulator pressure tester body 1, and the other end is connected to the printer to ensure that the test data of the accumulator pressure tester body 1 is output in a controlled manner;

[0040] The accumulator pressure maintaining tester body 1 receives voltage data V1, ambient temperature, and air pressure data collected at preset multiple time nodes, takes the ambient temperature and air pressure data collected for the first time as the reference environmental conditions, converts the voltage data V1 collected at other time nodes into a voltage value V2' under the reference environmental conditions, converts the voltage data V1 collected for the first time and the voltage values ​​V2' of other time nodes obtained by conversion into corresponding pressure values, and calculates the absolute value of the difference between the pressure values ​​corresponding to other time nodes and the pressure values ​​corresponding to the first collection respectively. If the absolute value of the difference does not exceed the allowable error, the pressure maintaining capacity of the accumulator under test is qualified.

[0041] The voltage data V1 collected at other time nodes is converted to the voltage value V2' under the reference environmental conditions as follows:

[0042] V2'=[(P1+kV1+V)T2 / T1-P2] / k

[0043] Among them, P1 and P2 are the measured values ​​of air pressure at temperature T1 and temperature T2 respectively, k and V are empirical constants and voltage zero value respectively, V1 is the measured value of voltage at temperature T2, and V2' is the equivalent value of the measured value of voltage at temperature T2 at temperature T1.

[0044] The method to convert the voltage value into the corresponding pressure value is:

[0045] p1=p0+[(V1-V) / V]×p0

[0046] Among them, p1 is the equivalent pressure value of the voltage data at the required time node under the reference environmental conditions; p0 is the zero-position pressure value.

[0047] In this embodiment, the accumulator pressure holding tester body 1 is provided with three pressure data acquisition aviation plug females, one environmental data acquisition aviation plug female, and one printing aviation plug female.

[0048] One end of the pressure sensor connecting cable 2 is welded with an aviation plug male head for connecting to the pressure data acquisition aviation plug female head, and each of the eight ends is welded with an aviation plug female head for connecting to the aviation plug male head of the accumulator pressure sensor under test.

[0049] Both ends of the environment sensor connection cable 3 are welded with aviation plug males, which are respectively connected to the environment data acquisition aviation plug female and the aviation plug female of the atmospheric pressure and temperature sensor.

[0050] One end of the printer connection cable 4 is welded with an aviation plug male head for connecting with the printer aviation plug female head, and the other end is matched with the interface of the printer.

[0051] Furthermore, the accumulator pressure maintaining tester body 1 also has the functions of equipment monitoring, historical data measurement, system setting, test task management, and network communication.

[0052] The equipment monitoring function is mainly used in the accumulator pressure test. It displays the current atmospheric pressure, temperature, humidity, the status of the accumulator pressure sensor connected to the accumulator pressure tester, and the current voltage value. The accumulator pressure sensor power supply can be turned on and off through the software switch to ensure its service life. The color of the monitoring interface can also prompt the user whether the accumulator pressure data is within the normal range;

[0053] The historical data measurement function is mainly used for statistics, display and export of previous accumulator pressure test data. Single and parallel queries can be performed by measurement type, task name, accumulator pressure sensor number, operator, etc. The exported data can be exported according to product type, including pre-installation inspection, zero position inspection and pressure test related data records, and the test report can be output in a preset format;

[0054] The system setting function is mainly used to set basic information such as test type, model product type, number of collections within the test cycle, power-on time of the accumulator pressure sensor before collection, upper and lower limits of voltage data fluctuation, etc., for quick use when creating a new test task;

[0055] The test task management function is mainly used for setting and managing specific test task information, including creating new tasks, starting tasks, pausing tasks, terminating tasks, etc.

[0056] The network communication function is mainly used to realize the network transmission and remote collection of accumulator pressure maintenance test data.

[0057] The present invention also provides a pressure accumulator pressure maintenance test method, comprising the following steps:

[0058] Convert the current accumulator pressure sensor output voltage data into a voltage value under the pressure holding test reference environmental conditions;

[0059] Convert the voltage data collected for the first time and the voltage value under the converted reference environmental conditions into pressure values;

[0060] The multiple pressure values ​​obtained during the test are compared with the corresponding 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 error allowance, the pressure holding capacity of the tested accumulator is qualified, otherwise it is unqualified;

[0061] Save the collected multiple pressure values, generate test data report according to the user-defined data report format, and output the accumulator pressure maintenance test report.

[0062] Taking a pressure holding test as an example, the operation process of the pressure holding test device for the accumulator is described in detail:

[0063] Open the cable storage compartment cover of the accumulator pressure tester and take out the pressure sensor connecting cable 2;

[0064] Open the sliding door of the atmospheric pressure and temperature sensor storage compartment of the accumulator pressure tester body, and take out the environmental sensor connection cable 3;

[0065] Open the cable storage compartment cover of the accumulator pressure tester and take out the matching AC220V three-plug power cable;

[0066] Connect the eight-end of the pressure sensor connecting cable 2 to the male aviation plug of the pressure sensor on the accumulator product to be tested, and connect the one-end to the corresponding female aviation plug marked on the accumulator pressure tester body 1. Ensure that the connection is stable and good, and align the red mark to insert;

[0067] In this embodiment, the four female aviation plugs in the eight-head end of the pressure sensor connection cable 2 are used to connect the male aviation plugs of the pressure sensors on the four pressure accumulator products respectively;

[0068] Connect the aviation plug end of the environmental sensor connection cable 3 to the female aviation plug of the accumulator pressure tester body 1 environmental data acquisition plug, ensure that the plug is firmly connected, and align the red mark to insert it;

[0069] Print the aviation plug end of the connection cable 4 and connect it to the accumulator pressure tester body 1. Print the female aviation plug to ensure that the connection is stable and good. Align the red mark and insert it.

[0070] Turn on the power supply of the accumulator pressure holding tester body 1;

[0071] Press the main power switch on the panel 1 of the accumulator pressure tester. After the power is turned on, the green power indicator next to the button is always on, and the red data indicator flashes according to the data access status. The system will directly enter the standby interface of the accumulator pressure test software;

[0072] Press and click the power switch of the atmospheric pressure temperature sensor connected to the environmental sensor connection cable 3 to power it on, and observe whether the data displayed on its LCD is consistent with the temperature, humidity and atmospheric pressure on the monitoring interface of the accumulator pressure holding test software equipment;

[0073] Click System Settings to enter the System Settings interface, and enter basic configuration information such as sensor model type, test type (pre-installation test, zero position test, pressure holding test), number of acquisitions, acquisition interval, and accumulator pressure sensor power-on time before acquisition;

[0074] In this embodiment, the collection type is set to pressure holding test, the collection interval is set to 8 hours, the accumulator pressure sensor is powered on for 1 minute before collection, and the sensor model type is a silicon pressure sensor;

[0075] Click the upper left corner of the standby interface of the accumulator pressure holding test software, select the connected pressure sensor cable connector number in the pop-up interface, enter the sensor number, calibration period, normal temperature voltage sensitivity, normal temperature zero output in sequence, and enter the measurement task name, measurement type, product model, product drawing number, and operator in the header part;

[0076] In this embodiment, the sensor number, calibration period, normal temperature voltage sensitivity, and normal temperature zero position output are taken from the factory certificate of the accumulator pressure sensor; the remaining information is filled in according to the test requirements;

[0077] Click the lower left corner of the current interface to start measuring, and the system will automatically return to the real-time sensor monitoring interface. At this time, the sensor just entered has turned green, indicating that it is working;

[0078] The test is carried out according to the preset test time, acquisition frequency and other parameters. No manual intervention is required during the test. Just keep the accumulator pressure tester powered stably. The accumulator pressure tester automatically records relevant data according to the preset parameters.

[0079] After the test is finished, click on the historical measurement data to view the detailed data records during the test, but it cannot be modified manually;

[0080] In the historical measurement data interface, click the Export button to generate the corresponding test report according to the task name or product drawing number and test type in the preset report format;

[0081] In this embodiment, a pressure test report for a pressure accumulator product for a certain type of launch vehicle is finally generated. The report content includes operation content, data records of the pressure test process, maximum fluctuation value after excluding temperature influence, test conclusions, etc.

[0082] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0083] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A pressure accumulator pressure test device, characterized in that: It includes the accumulator pressure holding tester body, the pressure sensor connecting cable, and the environmental sensor connecting cable; The pressure sensor connection cables are divided into several groups, each group is a one-way to eight-way connection cable, one-way end is connected to the accumulator pressure tester body, and each of the eight-way ends can be connected to the pressure sensor of the accumulator under test, so as to realize the simultaneous collection of the pressure sensor voltage data V1 of eight accumulators under test; One end of the environmental sensor connecting cable is connected to the accumulator pressure tester body, and the other end is connected to the atmospheric pressure temperature sensor to collect the temperature and air pressure data of the environment where the accumulator is tested and transmit them to the accumulator pressure tester body; The accumulator pressure maintaining tester body receives voltage data V1, ambient temperature, and air pressure data collected at preset multiple time nodes, takes the ambient temperature and air pressure data collected for the first time as the reference environmental conditions, converts the voltage data V1 collected at other time nodes into a voltage value V2' under the reference environmental conditions, converts the voltage data V1 collected for the first time and the voltage values ​​V2' of other time nodes obtained by conversion into corresponding pressure values, and calculates the absolute value of the difference between the pressure values ​​corresponding to other time nodes and the pressure values ​​corresponding to the first collection respectively. If the absolute value of the difference does not exceed the allowable error, the pressure maintaining capacity of the accumulator under test is qualified.

2. The accumulator pressure test device according to claim 1, characterized in that: The voltage data V1 collected at other time nodes is converted to the voltage value V2' under the reference environmental conditions as follows: V2'=[(P1+kV1+V)T2 / T1-P2] / k Among them, P1 and P2 are the measured values ​​of air pressure at temperature T1 and temperature T2 respectively, k and V are empirical constants and voltage zero value respectively, V1 is the measured value of voltage at temperature T2, and V2' is the equivalent value of the measured value of voltage at temperature T2 at temperature T1.

3. The accumulator pressure-maintaining test device according to claim 2, characterized in that: The method to convert the voltage value into the corresponding pressure value is: p1=p0+[(V1-V) / V]×p0 Among them, p1 is the equivalent pressure value of the voltage data at the required time node under the reference environmental conditions; p0 is the zero-position pressure value.

4. The accumulator pressure-maintaining test device according to claim 1, characterized in that: It also includes a printing connection cable, one end of which is connected to the accumulator pressure maintaining tester body, and the other end is connected to the printer, so as to ensure the controlled output of the test data of the accumulator pressure maintaining tester body.

5. The accumulator pressure-maintaining test device according to claim 4, characterized in that: The main body of the accumulator pressure holding tester is equipped with several pressure data acquisition aviation plug females, one environmental data acquisition aviation plug female, and one printing aviation plug female.

6. The accumulator pressure-maintaining test device according to claim 5, characterized in that: One end of the pressure sensor connecting cable is welded with an aviation plug male head for connecting to the pressure data acquisition aviation plug female head, and each of the eight ends is welded with an aviation plug female head for connecting to the aviation plug male head of the accumulator pressure sensor under test.

7. The accumulator pressure-maintaining test device according to claim 5, characterized in that: Both ends of the environmental sensor connection cable are welded with aviation plug males, which are respectively connected to the environmental data acquisition aviation plug female and the aviation plug female of the atmospheric pressure and temperature sensor.

8. The accumulator pressure-maintaining test device according to claim 5, characterized in that: One end of the printer connection cable is welded with an aviation plug male head for connecting with the printer aviation plug female head, and the other end is matched with the interface of the printer.

9. The accumulator pressure-maintaining test device according to claim 1, characterized in that: The accumulator pressure holding tester body also has the functions of equipment monitoring, historical data measurement, system setting, test task management and network communication.

10. A pressure accumulator pressure test method based on the device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Convert the current accumulator pressure sensor output voltage data into a voltage value under the pressure holding test reference environmental conditions; Convert the voltage data collected for the first time and the voltage value under the converted reference environmental conditions into pressure values; The multiple pressure values ​​obtained during the test are compared with the corresponding 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 error allowance, the pressure holding capacity of the tested accumulator is qualified, otherwise it is unqualified; Save the collected multiple pressure values, generate test data report according to the user-defined data report format, and output the accumulator pressure maintenance test report.

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