CN102175446B - Detection device for safety valve assembly - Google Patents
Detection device for safety valve assembly Download PDFInfo
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- CN102175446B CN102175446B CN 201110045181 CN201110045181A CN102175446B CN 102175446 B CN102175446 B CN 102175446B CN 201110045181 CN201110045181 CN 201110045181 CN 201110045181 A CN201110045181 A CN 201110045181A CN 102175446 B CN102175446 B CN 102175446B
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Abstract
The invention discloses a detection device for a safety valve assembly, wherein a translational platform and two angular brackets are distributed on a stander; a displacement sensor and a force sensor are fixed on the translational platform through the angular brackets; the pressure for opening a valve is detected by the force sensor through a linear bearing; the displacement sensor is connected to an adjustable bolt so as to detect the stroke of the opened valve; the output of the displacement sensor and the force sensor is input to a control module through a data conditioning and acquisition module, and displayed through a liquid crystal display (LCD) module; the data is transmitted to a host computer through a data transmission module; a self-detection and self-calibration module is controlled to automatically detect by the control module; and the control module can be normally operated again by a watchdog module when the operation of the control module is out of control. The detection device for the safety valve assembly has a simple structure, good universality, a low manufacture cost, is easy to manufacture and assemble, is compact, lightweight and portable in size; in addition, the detection device is movable.
Description
Technical field
The present invention relates to a kind of detection device for safety valve component, particularly to the detection of aircraft fuel oil servo-drive system safety valve.
Background technology
The safety valve assembly is to prevent that inside and outside differential pressure in the fluid system (malleation or negative pressure) is excessive and the safety feature that causes system destruction.It is the important component part of aircraft engine, and its kind is many, and quantity is large, also is one of topmost repairing annex.At home, the event of initiation is too numerous to enumerate because safety valve breaks down, and this aviation safety to China has consisted of serious threat.
By the investigation to domestic many aircraft factories, the pick-up unit based on hydraulic system is adopted in the detection of finding safety valve mostly, such as the conventional hydraulic pick-up unit with based on the pick-up unit of complex hydraulic system.Conventional hydraulic pick-up unit measuring accuracy is low, volume is large, power consumption is large, floor area is large, structure of the detecting device based on complex hydraulic system is complicated, cost is high, the difficulty that causes safety valve to detect, cost is high, has restricted to a certain extent raising and the development of valve productive capacity and detection level.Therefore, under the prerequisite that guarantees the safety valve product quality, in order to improve the safety valve accuracy of detection, simplify structure of the detecting device, reduce cost, developing a kind of novel valve pick-up unit has extremely important meaning.
Summary of the invention
In order to overcome that the prior art precision is low, volume is large, power consumption is large or complex structure, deficiency that cost is high, the invention provides a kind of pick-up unit based on the dynamoelectric intelligent control system, this apparatus structure is simple, dexterous, cost is low, can accurately measure controlled pressure, path increment and the working temperature of valve, and can be by the real-time data of measuring of liquid crystal display, draw valve controlled pressure and path increment curve map, finally generate examining report.
The technical solution adopted for the present invention to solve the technical problems is: comprise safety valve detecting unit, data acquisition conditioning module, control module, LCD MODULE, self-test and self-calibration quasi-mode piece, watchdog module and data transmission module.
Described safety valve detecting unit comprises translation stage, three angle supports, frame, displacement transducer and power sensors.Be distributed with successively translation stage at the frame upper surface along straight line, two bugle supports and three bugle supports, translation stage moves along this rectilinear direction, and upper surface is fixed with a bugle support, be fixed with displacement transducer and power sensor on the one bugle support, linear bearing passes two bugle supports, one termination touch force sensor, other end contact valve, valve is fixed on the three bugle supports, when the translation stage feeding, the power sensor is by linear bearing indirect contact safety valve, record valve and open pressure, path increment when displacement transducer connects expansion screw on the two bugle supports and detects valve and open, the controlled pressure of displacement transducer and power sensor senses valve and path increment also change it into electric signal, carry out pre-filtering by the data conditioning acquisition module, isolation, amplify, anti-aliasing filter and analog to digital conversion become digital voltage signal, be input in the control module, digital signal after control module will be changed is scaled valve controlled pressure and path increment, and by LCD MODULE the data after converting are shown in real time, simultaneously transfer data to host computer by data transmission module, control module control self-test and self-calibration quasi-mode piece, produce electric signal the data collection modulation module is carried out self check, in the stressed different situation of valve, test data and expectation value are compared, and calibration factor is stored in the EEPROM internal memory, as to the sensor fixed error, the drift compensation of mimic channel among gain amplifier and the ADC, watchdog module is the programmable watchdog timer, during normal operation, control module can with one regular time the interval register of WatchDog Timer is carried out write operation, when control module occurs moving because of system mistake when out of control, can stop the write operation to the WatchDog Timer register, at this moment, watchdog module sends reset signal to control module under the driving of self timer, so that control module can normally be moved again.
The present invention also comprises an acousto-optic hint module, controlled pressure, path increment when working according to the different model safety valve, set corresponding work threshold values scope for safety valve, control module will compare from controlled pressure, the path increment of data conditioning acquisition module and working pressure threshold value and the impulse stroke threshold value of presetting.When the controlled pressure of safety valve during less than the minimum value of job control pressure threshold value, LCD MODULE shows " owing power "; When the controlled pressure of safety valve during greater than the maximal value of job control pressure threshold value, LCD MODULE shows " exertin "; When the safety valve controlled pressure was in the scope of work threshold values, acousto-optic hint module prompting controlled pressure was normal.When the path increment of safety valve during less than the minimum value of impulse stroke threshold values, LCD MODULE shows " owing the position "; When the path increment of safety valve during greater than the maximal value of impulse stroke threshold values, LCD MODULE shows " crossing the position "; When the path increment of safety valve was in the scope of impulse stroke threshold values, acousto-optic hint module prompting path increment was normal.When safety valve controlled pressure and path increment reached corresponding work threshold values simultaneously, LCD MODULE showed information such as preparing detection.
The translation stage model that the present invention adopts is TSM25-2A.
Described linear bearing is selected the ball linear bearing, and as the power guide pole between power sensor and the valve, its Mo Chali is very little, can ignore, and therefore, the systematic error of this device is very little.
The invention has the beneficial effects as follows: simple in structure, versatility is good, is easy to the processing assembling, and processing cost is low, and compact size is light, has mobility, conveniently under the various working occasion safety valve is detected.Pick-up unit has adopted the off-load technology, eliminates the introducing of external force; Adopted self check and self calibration technology, the accuracy of detection of safety valve and the reliability of product are high; Adopt liquid crystal display, can check the data that each operation is measured, and the operation indicating that carries out next step, very friendly to the conduction interactive interface; By network interface the safety valve pick-up unit is linked to each other with host computer, realize communication, generate quickly and easily product inspection report.
Description of drawings
Fig. 1 is composition frame chart of the present invention;
Fig. 2 is safety valve detecting unit frock synoptic diagram;
Among the figure, 101 accurate translation stages, 102 displacement transducers, 103 jiaos of support 1,104 power sensors, 105 expansion screws, 106 linear bearings, 107 jiaos of support 2,108 safety valves, 109 jiaos of support 3,110 frames.
Fig. 3 is the control system process flow diagram;
Fig. 4 is data acquisition transformant process flow diagram;
Fig. 5 is based on the data transmission sub-process figure of network interface;
Fig. 6 is sensor signal conditioning Acquisition Circuit instance graph;
Fig. 7 is based on CAN bus circuit instance graph;
Fig. 8 is that liquid crystal display drives and the display circuit instance graph.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is functional block diagram of the present invention.Described detection device for safety valve component comprises the safety valve detecting unit, sensor group, data acquisition conditioning module, control module, LCD MODULE, self check, self calibration module, watchdog module, data transmission module, acousto-optic hint module.The present invention adopts accurate sensor group that safety valve is detected, then with the feeble signal input data conditioning acquisition module that records, signal is carried out pre-filtering, isolation, amplification, anti-aliasing filter and analog to digital conversion become digital voltage signal, be input in the control module; In control module, for safety valve presets corresponding work threshold values, will be from digital voltage signal and its comparison of data conditioning acquisition module, whether detect safety valve qualified; LCD MODULE is mainly used in being presented at valve controlled pressure, path increment and the operation indicating etc. that record in the safety valve testing process; Data transmission module receives the data in the safety valve testing process, and this data communication device is crossed network interface is sent in the host computer, and draws valve controlled pressure and path increment curve map in host computer, finally generates examining report etc.With reference to figure 1, the sensor group is distributed in the safety valve detecting unit, the sensor group comprises accurate displacement transducer and power sensor, controlled pressure that can accurate perception valve and path increment also change it into electric signal, the feeble signal that records by data conditioning acquisition module processes sensor group, and this signal is carried out pre-filtering, isolation, amplification, anti-aliasing filter and analog to digital conversion become digital voltage signal, be input in the control module.LCD MODULE is mainly used in being presented at valve pressure, path increment and operation indicating etc. measured in the safety valve testing process.In control module, the digital signal after the conversion is scaled valve controlled pressure and path increment, and by LCD MODULE the data after converting is shown in real time, transfer data to host computer by data transmission module simultaneously, realize communication.Controlled pressure, path increment when working according to the different model safety valve, for safety valve is set corresponding work threshold values scope, control module will compare with working pressure threshold value and the impulse stroke threshold value preset from controlled pressure, the path increment digital voltage signal of data conditioning acquisition module.When the controlled pressure of safety valve during less than the minimum value of job control pressure threshold value, LCD MODULE shows " owing power "; When the controlled pressure of safety valve during greater than the maximal value of job control pressure threshold value, LCD MODULE shows " exertin "; When the safety valve controlled pressure was in the scope of work threshold values, acousto-optic hint module prompting controlled pressure was normal.When the path increment of safety valve during less than the minimum value of impulse stroke threshold values, LCD MODULE shows " owing the position "; When the path increment of safety valve during greater than the maximal value of impulse stroke threshold values, LCD MODULE shows " crossing the position "; When the path increment of safety valve was in the scope of impulse stroke threshold values, acousto-optic hint module prompting path increment was normal.When safety valve controlled pressure and path increment reached corresponding work threshold values simultaneously, LCD MODULE showed information such as preparing detection.Data transmission module receives the data in the safety valve testing process, and data communication device is crossed network interface is sent to host computer; By control module control self-test and self-calibration quasi-mode piece hardware circuit is carried out self check, and self calibration is carried out in compensation to test data, has improved the precision of safety valve detection and the reliability of product; Watchdog module is the programmable watchdog timer, during normal operation, control module can with one regular time the interval register of WatchDog Timer is carried out write operation, when control module occurs moving because of system mistake when out of control, can stop the write operation to the WatchDog Timer register, at this moment, watchdog module can send reset signal to control module under the driving of timer of self, uses control module again normally to move.
Described safety valve detecting unit comprises translation stage, angle support 1, angle support 2, angle support 3, frame, displacement transducer and power sensor.Displacement transducer and power sensor are fixed on the angle support 1, and angle support 1 is fixed on the translation stage, and translation stage is fixed on the frame.Linear bearing is fixed on the angle support 2, linear axis one termination touch force sensor, other end contact valve.Valve is fixed on the angle support 3, and angle support 3 is fixed on the frame.When the translation stage feeding, the power sensor records valve and opens pressure by bearing indirect contact safety valve.Displacement transducer is by the expansion screw indirect joint valve on the angle support 2, path increment when the detection valve is opened, valve and angle support 3 usefulness quick-release screws are fixed, and make things convenient for the quick loading and unloading of valve, self resistance of displacement transducer by expansion screw and angle support off-load on frame.Regulate translation stage, the controlled pressure of displacement transducer and power sensor senses valve and path increment also change it into electric signal, carry out pre-filtering, isolation, amplification, anti-aliasing filter and analog to digital conversion by the data conditioning acquisition module and become digital voltage signal, be input in the control module.Digital signal after control module will be changed is scaled valve controlled pressure and path increment, and by LCD MODULE the data after converting is shown in real time, transfers data to host computer by data transmission module simultaneously.Control module control self-test and self-calibration quasi-mode piece, the electric signal that produces certain waveform carries out self check to the data collection modulation module, in the stressed different situation of valve, test data and expectation value are compared, and calibration factor is stored in the EEPROM internal memory, as the drift compensation to mimic channel among sensor fixed error, gain amplifier and the ADC, the precision of safety valve detection and the reliability of product have been improved.Watchdog module is the programmable watchdog timer, during normal operation, control module can with one regular time the interval register of WatchDog Timer is carried out write operation, when control module occurs moving because of system mistake when out of control, can stop the write operation to the WatchDog Timer register, at this moment, watchdog module sends reset signal to control module under the driving of self timer, uses control module again normally to move.Fig. 2 is safety valve detecting unit frock synoptic diagram.Open pressure, path increment for what detect safety valve, adopt accurate translation stage 101 (model that the present invention adopts is TSM25-2A) to realize feeding, collaborative work between power sensor 104 and the displacement transducer 102 is fixed on the angle support 103 jointly.When mobile translation stage 101,104 of power sensors can pass through bearing 106 indirect contact safety valves 108, can record valve and open pressure, displacement transducer 102 is contacted with the expansion screw 105 on the angle support 107, path increment in the time of can detecting simultaneously valve and open, and self resistance of displacement transducer can pass through expansion screw, angle support off-load on frame 110.The present invention selects ball linear bearing 106 as the power guide pole between power sensor 104 and the valve, and its Mo Chali is very little, can ignore, and therefore, the systematic error of this device is very little.Regulate translation stage 101, judge that whether the controlled pressure of safety valve and path increment reach in the work threshold values scope, can finish testing.For the tool structure of safety valve detecting unit, by mating the sensor of different ranges, can finish the work that the different model safety valve detects.
Fig. 3 is the control system process flow diagram.When the detection device for safety valve component electrifying startup, system begins initialization, and the self-check program operation judges whether normal operation, and maintenance is then pointed out in malfunction, otherwise continues to carry out.Enter master menu, can check the information of native system.When entering the safety valve detecting pattern, begin to start A/D conversion and interface interruption subroutine, carry out data acquisition, and data communication device is crossed the liquid crystal display subroutine be presented on the liquid crystal display, send to the enterprising line number of host computer according to one's analysis by network interface communicator program, finally generate examining report at host computer.
Fig. 4 is data acquisition conversion process figure.When translation stage is realized feeding, sensor output feeble signal, carry out pre-filtering, isolation, amplification, anti-aliasing filter by modulate circuit, resulting signal changes into and is digital voltage signal, and send in the control module, the digital signal after the conversion is scaled valve controlled pressure and path increment, and by LCD MODULE the data after converting is shown in real time, simultaneously transfer data to host computer by data transmission module, realize communication.Controlled pressure when working according to the different model safety valve, path increment, for safety valve is set corresponding work threshold values scope, control module will compare with working pressure threshold value and the impulse stroke threshold value preset from the multi-path digital voltage signal of data conditioning acquisition module, when its less than the work minimum value of threshold values or its during greater than the maximal value of work threshold values, LCD MODULE shows " defective ", and prompting is returned, only have when it satisfies the scope of work threshold values, acousto-optic hint module prompting " qualified ", LCD MODULE show information such as preparing detection.
Fig. 5 is the data transmission flow process figure that the present invention is based on network interface.Beginning is carried out initialization to the network port and communication data district at first respectively; Then judge the required network port that communicates connection; Receive handshake from host computer by this network port, if do not receive the handshake from host computer, then return, continue to wait for the signal of host computer.If received the handshake from host computer, then begin to send to host computer by the network port detection data of safety valve.Send the most at last the detection data of safety valve with data structure forms such as messages.Every frame message information structure has comprised the data messages such as the detection data of header, telegram end and safety valve assembly and switching on and shutting down time.Judge at last whether data send complete, do not continue to send data if data are sent just to return.
Fig. 6 is sensor signal conditioning Acquisition Circuit instance graph; Fig. 7 is the data transmission circuit instance graph based on CAN bus network interface; Fig. 8 is display screen and the driving circuit instance graph thereof of detection device for safety valve component.These three circuit are circuit common, here no longer introduce.
Claims (3)
1. detection device for safety valve component, comprise the safety valve detecting unit, the data acquisition conditioning module, control module, LCD MODULE, self-test and self-calibration quasi-mode piece, watchdog module and data transmission module, it is characterized in that: described safety valve detecting unit comprises translation stage, three angle supports, frame, displacement transducer and power sensor, be distributed with successively translation stage at the frame upper surface along straight line, two bugle supports and three bugle supports, translation stage moves along this rectilinear direction, and the translation stage upper surface is fixed with a bugle support, be fixed with displacement transducer and power sensor on the one bugle support, linear bearing passes two bugle supports, one termination touch force sensor, other end touch-safe valve, safety valve is fixed on the three bugle supports, when the translation stage feeding, the power sensor is by linear bearing indirect contact safety valve, record safety valve and open pressure, path increment when displacement transducer connects expansion screw on the two bugle supports and detects safety valve and open, the controlled pressure of displacement transducer and power sensor senses safety valve and path increment also change it into electric signal, carry out pre-filtering by the data acquisition conditioning module, isolation, amplify, anti-aliasing filter and analog to digital conversion become digital voltage signal, be input in the control module, digital signal after control module will be changed is scaled safety valve controlled pressure and path increment, and by LCD MODULE the data after converting are shown in real time, simultaneously transfer data to host computer by data transmission module, control module control self-test and self-calibration quasi-mode piece, produce electric signal the data collection modulation module is carried out self check, in the stressed different situation of safety valve, test data and expectation value are compared, and calibration factor is stored in the EEPROM internal memory, as to the sensor fixed error, the drift compensation of mimic channel among gain amplifier and the ADC, watchdog module is the programmable watchdog timer, during normal operation, control module can with one regular time the interval register of WatchDog Timer is carried out write operation, when control module occurs moving because of system mistake when out of control, can stop the write operation to the WatchDog Timer register, at this moment, watchdog module sends reset signal to control module under the driving of self timer, so that control module can normally be moved again.
2. a kind of detection device for safety valve component according to claim 1, it is characterized in that: described translation stage model is TSM25-2A.
3. a kind of detection device for safety valve component according to claim 1, it is characterized in that: described linear bearing is selected the ball linear bearing.
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| CN 201110045181 CN102175446B (en) | 2011-02-24 | 2011-02-24 | Detection device for safety valve assembly |
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| CN 201110045181 CN102175446B (en) | 2011-02-24 | 2011-02-24 | Detection device for safety valve assembly |
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| CN102175446A CN102175446A (en) | 2011-09-07 |
| CN102175446B true CN102175446B (en) | 2013-04-17 |
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| CN 201110045181 Expired - Fee Related CN102175446B (en) | 2011-02-24 | 2011-02-24 | Detection device for safety valve assembly |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106855458A (en) * | 2015-12-08 | 2017-06-16 | 江西昌河航空工业有限公司 | A kind of anti-vacuum valve checking tool of aircraft fuel tank |
| CN114166464B (en) * | 2021-11-12 | 2023-10-27 | 浙江省水利河口研究院(浙江省海洋规划设计研究院) | Wind wave and current force measuring device and method |
| CN117465690B (en) * | 2023-12-28 | 2024-03-22 | 商飞软件有限公司 | Method for health monitoring of starting valve of civil aircraft |
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| JP4120576B2 (en) * | 2003-12-15 | 2008-07-16 | 株式会社デンソー | Liquid volume measuring device |
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| CN201225962Y (en) * | 2008-06-10 | 2009-04-22 | 郑州轻工业学院 | Universal test platform for intelligent high voltage gas/liquid system |
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