CN102866063B - Automatic data acquiring device and automatic data acquiring method for pressure tester - Google Patents
Automatic data acquiring device and automatic data acquiring method for pressure tester Download PDFInfo
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- CN102866063B CN102866063B CN201210305888.0A CN201210305888A CN102866063B CN 102866063 B CN102866063 B CN 102866063B CN 201210305888 A CN201210305888 A CN 201210305888A CN 102866063 B CN102866063 B CN 102866063B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000003921 oil Substances 0.000 claims abstract description 81
- 238000012360 testing method Methods 0.000 claims abstract description 74
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 33
- 238000013480 data collection Methods 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 10
- 239000002828 fuel tank Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000007405 data analysis Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 239000004568 cement Substances 0.000 description 6
- 239000004484 Briquette Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides an automatic data acquiring device and an automatic data acquiring method for a pressure tester, and belongs to the technical field of data acquisition of pressure testers. The automatic data acquiring device comprises the pressure tester and a terminal computer, wherein the pressure tester comprises a main unit, an oil pump, an oil tank, an oil delivery tube, an oil return tube, a control cabinet, a pressure sensor and an electric oil return valve; and the control cabinet comprises an oil filter valve, a one-way proportional flow control valve, an acquiring card and a display plate. A full-automatic pressure testing mode is realized, so that a testing process is simple and standard, signals are acquired automatically, data are automatically converted, analyzed and processed, stability of flow of hydraulic oil in the pressure testing process is guaranteed, and then the validity and the authenticity of the data are improved.
Description
Technical field
The invention belongs to the data acquisition technology field of pressure testing machine, particularly a kind of automatic data collection device and method of pressure testing machine.
Background technology
At present, pressure testing machine has had in the context of detection of China's infrastructure construction to be applied widely, and it is for the test of the compressive strength to the building material product such as cement sample and component.But usually in the process of test, need manual to carry out open and close operation to send fuel tap, the oil return valve in pressure testing machine, make pressure testing machine can continuous working, but the time point of open and close be watched by human eye and judged, artificially operates; In process of the test, also need the change of manual oversight pressure, manual record force value and time, manually result data analyzed and process; Therefore, in process of the test human factor participate in more, cause test figure authenticity low, and test operation process whether specification will directly have influence on the reliability of data.Have influence on construction quality the most at last, severe patient can cause a hidden trouble to engineering, even causes great loss.
Summary of the invention
For the deficiency that prior art exists, the present invention proposes a kind of automatic data collection device and method of pressure testing machine, to realize process of the test robotization, signal automatic acquisition, data are changed automatically, automatic analysis and process, the workload that reduces a staff, improve the object of data validity in pressure test process and reliability.
An automatic data collection device for pressure testing machine, comprises pressure testing machine and terminal computer, and wherein, described pressure testing machine comprises main frame, oil pump, fuel tank, send oil pipe and scavenge pipe, also comprises switch board, pressure transducer and electronic oil return valve; Described switch board comprises oil strain valve, unidirectional operated proportional flow control valve, capture card and display board; Described switch board lower end is respectively equipped with perforate, send the two ends of oil pipe to be each passed through above-mentioned perforate, and one end connects oil pump, and the other end connects main frame; Be provided with oil strain valve sending on oil pipe, sending on oil pipe between oil strain valve and main frame is also provided with unidirectional operated proportional flow control valve, and described oil strain valve and single-phase operated proportional flow control valve are positioned at switch board lower end; Single-phase operated proportional flow control valve connects display board, and display board connects terminal computer; The oil pipe place that send between unidirectional operated proportional flow control valve and main frame is provided with pressure transducer, and the output terminal of pressure transducer connects the input end of capture card; The output terminal of described capture card connects terminal computer; Described display board and capture card are positioned at the upper end of switch board; Scavenge pipe between main frame and fuel tank is provided with electronic oil return valve.
Described oil strain valve, for filter flow to pressure testing machine main frame in impurity in hydraulic oil; Described unidirectional operated proportional flow control valve, for detecting the stability of the flowing velocity sending hydraulic oil in oil pipe, and can carry out adjust flux automatically; Described display board, for showing the flowing velocity sending hydraulic oil in oil pipe, and information is passed to terminal computer, then obtains the control information that terminal computer sends, above-mentioned control information is passed to unidirectional operated proportional flow control valve, carries out hydraulic fluid flow rate adjustment; Pressure transducer is for gathering the pressure signal produced when pressure testing machine detects sample test block; Described capture card, for gathering the current signal after pressure transducer conversion, and is uploaded to terminal computer by this current signal.
In described terminal computer, Control management system is installed, starts for controlled pressure testing machine and quit work; Instruction sheet is to the flow of operated proportional flow control valve regulator solution force feed; Convert the current signal of reception to force value, and analysis is carried out to it judge whether to meet standard value, finally generate pressue-graph.
Adopt the automatic data collection device of pressure testing machine to carry out the method for pressure detection, comprise step as follows:
Step 1, sample test block is put into the sample lay down location of pressure testing machine main frame, start the Control management system in terminal computer, initiation pressure is tested, and the hydraulic oil in pressure testing machine in oil pump flows to main frame by sending oil pipe;
Step 2, oil strain valve filter sending the impurity of hydraulic oil in oil pipe;
Step 3, unidirectional operated proportional flow control valve detect the flowing velocity of the hydraulic oil after filtering, and in real time speed are passed to display board;
Whether the flow of the hydraulic oil that the Control management system real-time judge display board in step 4, terminal computer shows is stablized, if unstable, Control management system will send control information to unidirectional operated proportional flow control valve, carry out voltage stabilizing adjustment by unidirectional operated proportional flow control valve to hydraulic fluid flow rate;
Step 5, hydraulic oil flow to main frame, in main frame, produce pressure, extrude sample test block, the pressure signal that pressure transducer Real-time Collection hydraulic oil produces, and pressure signal are converted to the current signal of 4 ~ 20 milliamperes;
Step 6, the capture card Real-time Collection current signal of 4 ~ 20 milliamperes after pressure transducer conversion, and current signal is uploaded to terminal computer;
Step 7, treat that the sample test block in pressure testing machine on main frame is crushed, then off-test, electronic oil return valve in Control management system controlled pressure testing machine in terminal computer is opened completely, all flow in fuel tank by scavenge pipe by the hydraulic oil in main frame;
Control management system in step 8, terminal computer is according to demarcation, convert the current signal of receive 4 ~ 20 milliamperes to force value, and final generation force value curve map, then to the data analysis collected, judge whether to meet standard value, finally automatically generate examining report.
Advantage of the present invention:
The automatic data collection device and method of a kind of pressure testing machine of the present invention, there is pressure test fully automatic mode, make that process of the test is simpler and more direct, specification, achieve signal automatic acquisition, data changed automatically, automatic analysis and process, ensure that the stability of hydraulic fluid flow rate in pressure test process, and then improve data validity, authenticity.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram of an embodiment of the present invention;
Fig. 2 is the pressure detection method workflow diagram of an embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described further.
The automatic data collection device of the pressure testing machine that an embodiment of the present invention adopts, as shown in Figure 1, comprise pressure testing machine and terminal computer, wherein, described pressure testing machine comprises main frame, oil pump, fuel tank, send oil pipe and scavenge pipe, it is characterized in that: also comprise switch board, pressure transducer and electronic oil return valve; Described switch board comprises oil strain valve, unidirectional operated proportional flow control valve, capture card and display board; Described switch board lower end is respectively equipped with perforate, send the two ends of oil pipe to be each passed through above-mentioned perforate, and one end connects oil pump, and the other end connects main frame; Be provided with oil strain valve sending on oil pipe, sending on oil pipe between oil strain valve and main frame is also provided with unidirectional operated proportional flow control valve, and described oil strain valve and single-phase operated proportional flow control valve are positioned at switch board lower end; Single-phase operated proportional flow control valve connects display board, and display board connects terminal computer; The oil pipe place that send between unidirectional operated proportional flow control valve and main frame is provided with pressure transducer, and the output terminal of pressure transducer connects the input end of capture card; The output terminal of described capture card connects terminal computer; Described display board and capture card are positioned at the upper end of switch board; Scavenge pipe between main frame and fuel tank is provided with electronic oil return valve.Wherein, the model of pressure testing machine is: SYE-2000; The model of pressure transducer is: SINYD-YLCG-003; The model of switch board is: SINYD-KZG-001; The model of oil strain valve is: XU-630; The model of unidirectional operated proportional flow control valve is: EFC-G-06; The model of electronic oil return valve is: electronic serial 220; The name of Control management system is called: pressure test Control management system.
Pressure testing machine is the pressure produced by hydraulic oil, detects the force value of sample test block, adopts cement briquette in the embodiment of the present invention.Wherein, described oil strain valve, for filter flow to pressure testing machine main frame in impurity in hydraulic oil; Described unidirectional operated proportional flow control valve, for detecting the stability of the flowing velocity sending hydraulic oil in oil pipe, and can carry out adjust flux automatically; Described display board, for showing the flowing velocity sending hydraulic oil in oil pipe, and information is passed to terminal computer, then obtains the control information that terminal computer sends, above-mentioned control information is passed to unidirectional operated proportional flow control valve, carries out hydraulic fluid flow rate adjustment; Pressure signal for gathering the pressure signal (every 100 milliseconds gather a pressure signal) produced when pressure testing machine detects cement briquette, and is converted to the current signal fluctuated within the scope of 4 ~ 20 milliamperes by pressure transducer in real time; Described capture card, for gathering the current signal after pressure transducer conversion, and is uploaded to terminal computer by this current signal.
The pressure test Control management system installed in described terminal computer, terminal computer is connected with the oil pump in pressure testing machine, electronic oil return valve respectively by signal wire, oil pressurization is sent by sending oil pipe to main frame for control oil pump, open completely for controlling electronic oil return valve, the hydraulic oil in main frame is all flow in fuel tank by scavenge pipe; Terminal computer is connected with display board in switch board by signal wire, for judging the stability of the hydraulic fluid flow rate that display board shows in real time, if unstable, pressure test Control management system will send control information to unidirectional operated proportional flow control valve, carrying out voltage stabilizing adjustment by unidirectional operated proportional flow control valve to hydraulic fluid flow rate (send the hydraulic fluid flow rate in oil pipe should keep same speed in process of the test, when running of hydraulic power oil excessive velocities, then slow down; When running of hydraulic power oil is crossed slow, then tune up); Terminal computer is connected with capture card by signal wire, for converting the current signal of receive 4 ~ 20 milliamperes to force value, in the embodiment of the present invention, range of pressure values is 0-2000 thousand Ns (4-20 milliampere signal and 0-2000 thousand Ns demarcate), and mineralization pressure curve map; Can judge whether the data collected to meet pressure criteria value, the present embodiment standard value be 1,000 thousand Ns simultaneously.
Adopt the automatic data collection device of pressure testing machine to carry out the method for pressure detection, as shown in Figure 2, comprise step as follows:
Step 1, cement briquette is put into the sample lay down location of pressure testing machine main frame, start the Control management system in terminal computer, initiation pressure is tested, and the hydraulic oil in pressure testing machine in oil pump flows to main frame by sending oil pipe;
Step 2, oil strain valve filter sending the impurity of hydraulic oil in oil pipe;
Step 3, unidirectional operated proportional flow control valve detect the flowing velocity of the hydraulic oil after filtering, and in real time speed are passed to display board;
Whether the flow of the hydraulic oil that the Control management system real-time judge display board in step 4, terminal computer shows is stablized, if unstable, Control management system will send control information to unidirectional operated proportional flow control valve, carry out voltage stabilizing adjustment by unidirectional operated proportional flow control valve to hydraulic fluid flow rate;
Step 5, hydraulic oil flow to main frame, pressure is produced in main frame, cement briquette is extruded, the pressure signal that pressure transducer Real-time Collection hydraulic oil produces, and convert pressure signal the current signal of 4 ~ 20 milliamperes to (wherein, every platform pressing machine all did once to be demarcated, i.e. this milliampere of current signal scope and range of pressure values one_to_one corresponding);
Step 6, the capture card Real-time Collection current signal of 4 ~ 20 milliamperes after pressure transducer conversion, and current signal is uploaded to terminal computer;
Step 7, treat that the cement briquette in pressure testing machine on main frame is crushed, then off-test, electronic oil return valve in Control management system controlled pressure testing machine in terminal computer is opened completely, all flow in fuel tank by scavenge pipe by the hydraulic oil in main frame;
Control management system in step 8, terminal computer is according to demarcation, convert the current signal of receive 4 ~ 20 milliamperes to force value, and final generation force value curve map, again to the data analysis collected, judge whether to meet standard value 1,000 thousand Ns, finally automatically generate examining report.
Claims (3)
1. the automatic data collection device of a pressure testing machine, comprise pressure testing machine and terminal computer, wherein, described pressure testing machine comprises main frame, oil pump, fuel tank, send oil pipe and scavenge pipe, it is characterized in that: also comprise switch board, pressure transducer and electronic oil return valve, described switch board comprises oil strain valve, unidirectional operated proportional flow control valve, capture card and display board; Described switch board lower end is respectively equipped with perforate, send the two ends of oil pipe to be each passed through above-mentioned perforate, and one end connects oil pump, and the other end connects main frame; Be provided with oil strain valve sending on oil pipe, sending on oil pipe between oil strain valve and main frame is also provided with unidirectional operated proportional flow control valve, and described oil strain valve and single-phase operated proportional flow control valve are positioned at switch board lower end; Single-phase operated proportional flow control valve connects display board, and display board connects terminal computer; The oil pipe place that send between unidirectional operated proportional flow control valve and main frame is provided with pressure transducer, and the output terminal of pressure transducer connects the input end of capture card; The output terminal of described capture card connects terminal computer; Described display board and capture card are positioned at the upper end of switch board; Scavenge pipe between main frame and fuel tank is provided with electronic oil return valve;
Described oil strain valve, for filter flow to pressure testing machine main frame in impurity in hydraulic oil; Described unidirectional operated proportional flow control valve, for detecting the stability of the flowing velocity sending hydraulic oil in oil pipe, and can carry out adjust flux automatically; Described display board, for showing the flowing velocity sending hydraulic oil in oil pipe, and information is passed to terminal computer, then obtains the control information that terminal computer sends, above-mentioned control information is passed to unidirectional operated proportional flow control valve, carries out hydraulic fluid flow rate adjustment; Pressure transducer is for gathering the pressure signal produced when pressure testing machine detects sample test block; Described capture card, for gathering the current signal after pressure transducer conversion, and is uploaded to terminal computer by this current signal.
2. the automatic data collection device of a kind of pressure testing machine according to claim 1, is characterized in that: be provided with Control management system in described terminal computer, starts and quit work for controlled pressure testing machine; Instruction sheet is to the flow of operated proportional flow control valve regulator solution force feed; Convert the current signal of reception to force value, and analysis is carried out to it judge whether to meet standard value, finally generate pressue-graph.
3. adopt the automatic data collection device of pressure testing machine according to claim 1 to carry out the method for pressure detection, it is characterized in that: comprise step as follows:
Step 1, sample test block is put into the sample lay down location of pressure testing machine main frame, start the Control management system in terminal computer, initiation pressure is tested, and the hydraulic oil in pressure testing machine in oil pump flows to main frame by sending oil pipe;
Step 2, oil strain valve filter sending the impurity of hydraulic oil in oil pipe;
Step 3, unidirectional operated proportional flow control valve detect the flowing velocity of the hydraulic oil after filtering, and in real time speed are passed to display board;
Whether the flow of the hydraulic oil that the Control management system real-time judge display board in step 4, terminal computer shows is stablized, if unstable, Control management system will send control information to unidirectional operated proportional flow control valve, carry out voltage stabilizing adjustment by unidirectional operated proportional flow control valve to hydraulic fluid flow rate;
Step 5, hydraulic oil flow to main frame, in main frame, produce pressure, extrude sample test block, the pressure signal that pressure transducer Real-time Collection hydraulic oil produces, and pressure signal are converted to the current signal of 4 ~ 20 milliamperes;
Step 6, the capture card Real-time Collection current signal of 4 ~ 20 milliamperes after pressure transducer conversion, and current signal is uploaded to terminal computer;
Step 7, treat that the sample test block in pressure testing machine on main frame is crushed, then off-test, electronic oil return valve in Control management system controlled pressure testing machine in terminal computer is opened completely, all flow in fuel tank by scavenge pipe by the hydraulic oil in main frame;
Control management system in step 8, terminal computer is according to demarcation, convert the current signal of receive 4 ~ 20 milliamperes to force value, and final generation force value curve map, then to the data analysis collected, judge whether to meet standard value, finally automatically generate examining report.
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| CN105526209B (en) * | 2014-09-28 | 2017-11-28 | 中国航空工业集团公司西安飞机设计研究所 | A kind of counter-pressure experimental rig and its method |
| CN106153526B (en) * | 2015-04-17 | 2020-07-24 | 上海宝钢工业技术服务有限公司 | Tinned plate pickling time lag test method |
| CN106323862A (en) * | 2015-06-29 | 2017-01-11 | 上海宝钢工业技术服务有限公司 | System and method of testing acid-pickling time lag value of tin-plated board |
| CN105045301A (en) * | 2015-08-03 | 2015-11-11 | 江西洪都航空工业集团有限责任公司 | Method for adjusting pulse test flow precisely |
| CN108254227A (en) * | 2018-02-01 | 2018-07-06 | 刘炀 | A kind of crude oil storage tank oil sample remote automatic acquisition device and acquisition method |
| CN108693045A (en) * | 2018-07-18 | 2018-10-23 | 和峻（广州）胶管有限公司 | The online high pressure constant-pressure test system of rubber hose |
| CN113340738B (en) * | 2021-05-24 | 2024-01-26 | 鲁西工业装备有限公司 | Full-automatic pressure test system and measurement method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2515669Y (en) * | 2001-11-16 | 2002-10-09 | 无锡建仪仪器机械有限公司 | Microprocessing controlled pressure tester |
| CN200947075Y (en) * | 2006-07-11 | 2007-09-12 | 谢永杰 | Multifunctional hydraulic testing machine |
| CN201982391U (en) * | 2010-12-20 | 2011-09-21 | 王俊涛 | Hydraulic speed limiting device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3852043B2 (en) * | 1998-12-28 | 2006-11-29 | 関東自動車工業株式会社 | Method for evaluating the durability of concrete |
| JP5660789B2 (en) * | 2010-03-04 | 2015-01-28 | 株式会社島津製作所 | Compression testing machine |
-
2012
- 2012-08-24 CN CN201210305888.0A patent/CN102866063B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2515669Y (en) * | 2001-11-16 | 2002-10-09 | 无锡建仪仪器机械有限公司 | Microprocessing controlled pressure tester |
| CN200947075Y (en) * | 2006-07-11 | 2007-09-12 | 谢永杰 | Multifunctional hydraulic testing machine |
| CN201982391U (en) * | 2010-12-20 | 2011-09-21 | 王俊涛 | Hydraulic speed limiting device |
Non-Patent Citations (4)
| Title |
|---|
| JP特开2000-193572A 2000.07.14 * |
| JP特开2011-185609A 2011.09.22 * |
| 基于PLC的压力试验机测控系统;赵欣 等;《自动测量与控制》;20080731;第27卷(第7期);58－62 * |
| 电液比例控制技术和策略及其在锻压设备中的应用;李小龙 等;《机床与液压》;20100630;第38卷(第11期);119－126 * |
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