CN103196660A - Multistation computer test system facing multitandem valves - Google Patents
Multistation computer test system facing multitandem valves Download PDFInfo
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- CN103196660A CN103196660A CN2012100074542A CN201210007454A CN103196660A CN 103196660 A CN103196660 A CN 103196660A CN 2012100074542 A CN2012100074542 A CN 2012100074542A CN 201210007454 A CN201210007454 A CN 201210007454A CN 103196660 A CN103196660 A CN 103196660A
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Abstract
The invention discloses a multistation computer test system facing multitandem valves. The test system comprises a computer data processing system, a plurality of test stations formed by data acquisition systems, hydraulic systems, tested multitandem valves and sensors, and a 485 bus. The system can carry out various tests for the multitandem valves, each oil port is provided with a pressure sensor and a flow sensor, pressure and flow signals can be collected in the tests, the pressure and flow signals are converted into electric signals, after the electric signals are converted into digital signals through analog to digital conversion, the digital signals are converted into pressure and flow data through a single chip program to be stored into a data storage module and simultaneously displayed through a display module; and the computer data processing system reads the data stored in all the station data storage modules through the 485 bus, the data are written into a data base to be analyzed and processed, a report is generated, the various test stations can work simultaneously or independently without mutual interference. The multistation computer test system can provide rapid and effective computer-aided testing means for the multitandem valve testing.
Description
Technical field
The present invention relates to the hydraulic valve field tests, particularly a kind of multistation computer testing system towards banked direction control valves.
Background technology
Banked direction control valves is the critical component that is used for changing the break-make relation of each oil circuit in hydrostatic transmission and control, and the quality of its performance index is directly connected to the quality of whole hydraulic system.Every banked direction control valves must carry out strict test to its parameter by various instrument before dispatching from the factory, check its performance whether to reach the index of correlation requirement.Have only the banked direction control valves through being up to the standards, just can dispatch from the factory, also only in this way could guarantee the normal operation by its whole hydraulic system that constitutes.Particularly for new product, must before formally putting into production, by type approval test the whole requirements whether product satisfies technical manual be tested.
At present, the test of banked direction control valves is mostly by manually finishing, record test figure by tensimeter and flowmeter, and by manual record, test findings is also drawn by manual analysis, this test method exists and is subject to shortcomings such as human factor influence, automaticity is low, measurement efficient is low, is difficult to satisfy the quality control demand of part in enormous quantities.
Summary of the invention
Purpose of the present invention is exactly in order to address the above problem, a kind of advanced person's the multistation computer testing system towards banked direction control valves is provided, can carry out automatic collection and the intellectual analysis of the every test figure of banked direction control valves, improve the efficient of banked direction control valves test, increase the credibility of test findings.The whole test method is according to JB/T 8729.2-1998 " hydraulic multichannel conversion valve test method " standard formulation, and the every test that can finish banked direction control valves detects, and shows automatically and the output test result.
For achieving the above object, the present invention adopts following technical scheme: a kind of multistation computer testing system towards banked direction control valves of the present invention is made up of a computer data processing system, several test stations and 485 buses, and each is tested station and is made up of data acquisition system (DAS), hydraulic system, tested banked direction control valves and sensor.
Describedly respectively test the multiple test that station can be implemented banked direction control valves, comprise: banked direction control valves controlled pressure and flow curve test, banked direction control valves controlled pressure and the test of working pressure curve, the leakage rate curve test of banked direction control valves under different operating pressure, the test of banked direction control valves flow resistance curve and banked direction control valves on-load pressure and flow curve test.
Described hydraulic system with the annexation of sensor is: the 35MPa pressure transducer is connected with testing table P mouth, A mouth and B mouth respectively by pressure measuring tie-in, the 10MPa pressure transducer is connected with testing table a mouth and b mouth respectively by pressure measuring tie-in, the 200L/min flow sensor is connected with testing table P mouth, A mouth, B mouth and tested banked direction control valves respectively by pipeline, and the 2000ml/min flow sensor is connected with testing table T mouth and tested banked direction control valves respectively by pipeline.
Described data acquisition system (DAS) comprises single-chip microcomputer, A/D converter, flow sensor, pressure transducer, signal conditioning circuit, multiway analog switch, sampling hold circuit, clock module, display module, communication module, button and data memory module.Wherein said flow sensor is connected with signal conditioning circuit respectively with pressure transducer; Described multiway analog switch is connected with signal conditioning circuit, sampling hold circuit and single-chip microcomputer; Described sampling hold circuit is connected with single-chip microcomputer and A/D converter; Described single-chip microcomputer is connected with clock module, display module, button, data memory module, A/D converter and communication module.
Described computer data processing system comprises PC, display, printer and 232/485 converter.Described PC is connected with printer with display, and is connected with 485 buses by 232/485 converter, and the communication module of each testing table data acquisition system (DAS) is connected with 485 buses.
Principle of work of the present invention is as follows:
Each hydraulic fluid port of tested banked direction control valves is installed flange or joint, oil inlet P mouth, A mouth, B mouth and the T mouth of banked direction control valves are connected with flow sensor respectively, control port a mouth, b mouth on its guide's hydraulic fluid port a mouth, b mouth and the test table top are connected, elder generation's typing test plan in computer data processing system before the test, test must be carried out in strict accordance with test plan.The sensor that is arranged on each hydraulic fluid port reads pressure and data on flows according to the needs of different tests, and show by display module, each sensor signal is amplified and filtering through signal conditioning circuit, by monolithic processor controlled multiway analog switch input, sampling hold circuit enters sampling pattern, treat to enter the maintenance pattern after the signal input, keep output voltage constant, signal carries out the A/D conversion subsequently, behind the EOC, deposit data in data memory module, computer data processing system reads the data in each testing table data memory module in turn, and writes database.Can check test findings and the trial curve and test findings is analyzed of each test by computer data processing system after the off-test, and can print form by printer.
Compared with prior art, the present invention has following advantage:
1) automaticity height, measuring speed are fast
Because the data acquisition system (DAS) that has adopted pressure transducer, flow sensor and Single Chip Microcomputer (SCM) system to form has realized the automatic collection of test figure and storage automatically;
2) test result is accurate, credible
Owing to adopt high-precision pressure transducer and flow sensor to record pressure, data on flows, and draw out various trial curves by software, need not manual intervention, guaranteed the accurate, credible of test result;
3) measurement result is carried out intellectual analysis
Owing to adopted methods such as process capability index, machine capability index and control chart that the measurement result of tested valve is carried out statistical analysis of quality, whether working ability and the process that not only can confirm equipment satisfy quality requirements, and can monitor the fluctuation situation of process quality in real time, judge whether operation is stable.
Description of drawings
Fig. 1 is general structure synoptic diagram of the present invention;
Fig. 2 is each testing table hydraulic system synoptic diagram of the present invention;
Fig. 3 is data acquisition theory diagram of the present invention;
Fig. 4 is working routine process flow diagram of the present invention.
Among the figure: 1, data acquisition system (DAS); 101, single-chip microcomputer; 102, clock module; 103, data memory module; 104, communication module; 105, button; 106, display module; 107, A/D converter; 108, sampling hold circuit; 109, multiway analog switch; 110, signal conditioning circuit; 2, hydraulic system; 201, stop valve I; 202, stop valve II; 203, charge valve I; 204, charge valve II; 205, stop valve III; 206, throttling valve; 207, multiple directional control valve I; 208, surplus valve I; 209, main pump; 210, service pump; 211, surplus valve II; 212, multiple directional control valve II; 213, reduction valve I; 214, reduction valve II; 215, pressure measuring tie-in; 3, tested banked direction control valves; 4, sensor; 41,35MPa pressure transducer; 42,10MPa pressure transducer; 43,200L/min flow sensor; 44,2000ml/min flow sensor; 5, computer data processing system; 51, display; 52, PC; 53, printer; 54,232/485 converter; 6,485 buses.
Embodiment
The general structure synoptic diagram of a kind of multistation computer testing system towards banked direction control valves of the present invention as shown in Figure 1, system is made up of a computer data processing system (5), several test stations and 485 buses (6), and each is tested station and is made up of data acquisition system (DAS) (1), hydraulic system (2), tested banked direction control valves (3) and sensor (4).
Described computer data processing system (5) comprises PC (52), display (51), printer (53) and 232/485 converter (54).Described PC (52) is connected with display (51) and printer (53), and is connected with 485 buses (6) by 232/485 converter (54), and the communication module (104) of each testing table data acquisition system (DAS) (1) is connected with 485 buses (6).
The testing table hydraulic system synoptic diagram of a kind of multistation computer testing system towards banked direction control valves of the present invention as shown in Figure 2, the annexation of described hydraulic system (2) and sensor (4) is: 35MPa pressure transducer (41) by pressure measuring tie-in (215) respectively with testing table P mouth, A mouth and B mouth connect, 10MPa pressure transducer (42) is connected with testing table a mouth and b mouth by pressure measuring tie-in (215), 200L/min flow sensor (43) by pipeline respectively with testing table P mouth, the A mouth, B mouth and tested banked direction control valves (3) connect, 2000ml/min flow sensor (44) is connected with testing table T mouth and tested banked direction control valves (3) respectively by pipeline.
A kind of multistation computer testing system theory diagram towards banked direction control valves of the present invention as shown in Figure 3, described data acquisition system (DAS) (1) comprises single-chip microcomputer (101), clock module (102), data memory module (103), communication module (104), button (105), display module (106), A/D converter (107), sampling hold circuit (108), multiway analog switch (109) and signal conditioning circuit (110).Wherein said signal conditioning circuit (110) is connected with 35MPa pressure transducer (41), 10MPa pressure transducer (42), 200L/min flow sensor (43) and 2000ml/min flow sensor (44) respectively; Described multiway analog switch (109) is connected with signal conditioning circuit (110), sampling hold circuit (108) and single-chip microcomputer (101); Described sampling hold circuit (108) is connected with single-chip microcomputer (101) and A/D converter (107); Described single-chip microcomputer (101) is connected with clock module (102), display module (106), button (105), data memory module (103), A/D converter (107) and communication module (104); Wherein said button (105) comprises data acquisition system (DAS) (1) shift knob, test type button and sampling switch button; Described data acquisition system (DAS) (1) shift knob is used for the open and close of control data acquisition system (DAS) (1); Because the data difference of the different required collections of test, described test type button are used for selecting tested number, single-chip microcomputer (101) is selected to read the data that this tests the sensor of required collection by reading this tested number, and deposits data memory module in; Described sampling switch button is used for the beginning of control data acquisition and stops.
Principle of work of the present invention is as follows:
Each hydraulic fluid port of tested banked direction control valves is installed flange or joint, oil inlet P mouth, A mouth, B mouth and the T mouth of banked direction control valves is connected with each flow sensor respectively, control port a mouth, b mouth on its guide's hydraulic fluid port a mouth, b mouth and the test table top are connected.Should be in computer data processing system before on-test the typing test plan, test must be carried out in strict accordance with test plan.The sensor that is arranged on each hydraulic fluid port reads pressure and data on flows according to the needs of different tests, and show by display module, each sensor signal is amplified and filtering through signal conditioning circuit, by monolithic processor controlled multiway analog switch input, sampling hold circuit enters sampling pattern, treat to enter the maintenance pattern after the signal input, keep output voltage constant, signal carries out the A/D conversion subsequently, behind the EOC, deposit data in data memory module, computer data processing system reads the data of respectively testing in the station data memory module in turn, and writes database.Can check test findings and the trial curve and test findings is analyzed of each test by computer data processing system after the off-test, and can print form by printer.
Be example explanation principle of work with banked direction control valves controlled pressure and flow curve test below, before carrying out P to A test, by lever operated multiple directional control valve II (212), make its position, left side work, and open stop valve I (201) the A mouth is connected with the B mouth, by lever operated multiple directional control valve I (207), make its right position work, begin test, check P mouth data on flows by display module, and regulate P mouth flow to reach testing requirements, press the sampling switch button this moment, regulating reduction valve I (213) subsequently makes a mouth pressure become big gradually in 0.6MPa to 2.5MPa scope, press the sampling switch button this moment again, and switch is upspring, and stops to gather, the flow sensor that is arranged on the A mouth reads data on flows, can obtain the curve that A mouth flow changes with a mouth controlled pressure; Carrying out P to B subsequently tests, by lever operated multiple directional control valve II (212), make its right position work, and open stop valve I (201) the A mouth is connected with the B mouth, by lever operated multiple directional control valve I (207), make its right position work, begin test, check P mouth data on flows by display module, and regulate P mouth flow to reach testing requirements, press the sampling switch button this moment, regulates reduction valve II (214) subsequently and make the b mouth pressure become big gradually in 0.6MPa to 2.5MPa scope, presses the sampling switch button this moment again, switch is upspring, stop sampling, the flow sensor that is arranged on the B mouth reads data on flows, can obtain the curve that B mouth flow changes with b mouth controlled pressure.All the other every experimental working techniques all similarly, so no longer describe in detail.
Working routine process flow diagram of the present invention the steps include: as shown in Figure 4
1) test is prepared
Clean tested valve, check test stand, electrical equipment and in computer data processing system the typing test plan, the content of every record comprises Part No. in the test plan table, date of test, need carry out information such as which test.
2) tested banked direction control valves is installed
Each hydraulic fluid port of tested banked direction control valves is installed flange or joint, oil inlet P mouth, A mouth, B mouth and the T mouth of banked direction control valves is connected with each flow sensor respectively, a mouth, b mouth on its guide's hydraulic fluid port a mouth, b mouth and the test table top are connected.
3) data acquisition system (DAS) initialization
After system power supply is opened, carry out a series of initial work by scm software control, comprise the initial work of state variable and numerical value in each register.
4) select pilot project also to carry out successively
Switch to first test carrying out by the test type button, pilot project must be carried out in strict accordance with the test plan of formulating in advance, start the data communication interface in the computer data processing system then, press the sampling switch button, the beginning image data is also tested, Single Chip Microcomputer (SCM) system reads the data of needed each sensor of this test in the process of the test, and deposit data memory module in, simultaneously can show each sensing data in real time by display module, computer data processing system reads data in the data memory module in each banked direction control valves testing table in turn by the timeslice that designs, and writes database; After a test is finished, press the sampling switch button again, switch is upspring, stop data collection, switch to next test by the test type button on the testing table afterwards, press the sampling switch button then, begin to test, so circulation is up to finishing last test.
5) dismantle tested banked direction control valves
After the test of a tested valve is all finished by test plan, dismantle tested valve, and the tested valve that will finish test moves to assigned address.
6) printing of generation test report and form
Enter the Report Server Management interface in the computer data processing system, check test findings and the trial curve of each test, adopt methods such as process capability index, machine capability index and control chart that the measurement result of tested valve is carried out statistical analysis of quality, and can print form by printer.
The above flow process is the workflow of a test station, and each is tested station and can work simultaneously as required or work independently, mutually noninterfere.
Claims (2)
1. multistation computer testing system towards banked direction control valves, it is characterized in that being made up of a computer data processing system, several test stations and 485 buses, each is tested station and is made up of data acquisition system (DAS) (1), hydraulic system (2), tested banked direction control valves (3) and sensor (4); Data acquisition system (DAS) (1) comprises single-chip microcomputer (101), clock module (102), data memory module (103), communication module (104), button (105), display module (106), A/D converter (107), sampling hold circuit (108), multiway analog switch (109) and signal conditioning circuit (110); Signal conditioning circuit (110) is connected with 35MPa pressure transducer (41), 10MPa pressure transducer (42), 200L/min flow sensor (43) and 2000ml/min flow sensor (44) respectively; Multiway analog switch (109) is connected with signal conditioning circuit (110), sampling hold circuit (108) and single-chip microcomputer (101); Sampling hold circuit (108) is connected with single-chip microcomputer (101) and A/D converter (107); Single-chip microcomputer (101) is connected with clock module (102), display module (106), button (105), data memory module (103), A/D converter (107) and communication module (104); Computer data processing system (5) comprises PC (52), display (51), printer (53) and 232/485 converter (54); Described PC (52) is connected with printer (53) with display (51), and is connected with 485 buses (6) by 232/485 converter (54), and the communication module (104) of each testing table data acquisition system (DAS) (1) is connected with 485 buses (6).
2. a kind of multistation banked direction control valves test macro according to claim 1 is characterized in that button (105) comprises data acquisition system (DAS) (1) shift knob, test type button and sampling switch button; Described data acquisition system (DAS) (1) shift knob is used for the open and close of control data acquisition system (DAS) (1); Because the data difference of the different required collections of test, described test type button are used for selecting tested number, single-chip microcomputer (101) is selected to read the data that this tests the sensor of required collection by reading this tested number, and deposits data memory module in; Described sampling switch button is used for the beginning of control data acquisition and stops.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100074542A CN103196660A (en) | 2012-01-10 | 2012-01-10 | Multistation computer test system facing multitandem valves |
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| CN2012100074542A CN103196660A (en) | 2012-01-10 | 2012-01-10 | Multistation computer test system facing multitandem valves |
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Cited By (5)
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| CN103471829A (en) * | 2013-09-05 | 2013-12-25 | 南京工业大学 | Multi-way valve test bed of hydraulic excavator |
| CN104776986A (en) * | 2014-01-15 | 2015-07-15 | 上海理工大学 | Performance testing device for safety valve |
| CN104990676A (en) * | 2015-07-03 | 2015-10-21 | 西安航天动力试验技术研究所 | Test bed valve sealing and operation characteristic detection system and detection method |
| CN105136442A (en) * | 2015-08-27 | 2015-12-09 | 无锡阳工机械制造有限公司 | Hydraulic multi-way selector valve delivery test detection method |
| CN105157971A (en) * | 2015-08-27 | 2015-12-16 | 无锡阳工机械制造有限公司 | Hydraulic multipath reversing valve delivery test method |
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| CN105136442A (en) * | 2015-08-27 | 2015-12-09 | 无锡阳工机械制造有限公司 | Hydraulic multi-way selector valve delivery test detection method |
| CN105157971A (en) * | 2015-08-27 | 2015-12-16 | 无锡阳工机械制造有限公司 | Hydraulic multipath reversing valve delivery test method |
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Application publication date: 20130710 |