CN101576524B - Detection device for dynamical contacting impedance of magnetic reed pipe and detection method thereof - Google Patents
Detection device for dynamical contacting impedance of magnetic reed pipe and detection method thereof Download PDFInfo
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- CN101576524B CN101576524B CN 200810037015 CN200810037015A CN101576524B CN 101576524 B CN101576524 B CN 101576524B CN 200810037015 CN200810037015 CN 200810037015 CN 200810037015 A CN200810037015 A CN 200810037015A CN 101576524 B CN101576524 B CN 101576524B
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Abstract
The invention discloses a detection device for dynamical contacting impedance of magnetic reed pipe and a detection method thereof. The device comprises a power supply, a computer, software, a digitalstorage oscilloscope card, a microprocessor, an electromagnetic valve controller, a signal generator, a tool and an air cylinder, wherein the microprocessor controls test actions of the whole detecti on device through communication between the microprocessor and the computer, and the electromagnetic valve controller converts electronic control signals to control signals suitable for the air cylinder after receiving the electronic control signals emitted by the microprocessor to enable the air cylinder to do relative motion; after the signal generator connected with the microprocessor generatesa consecutive special waveform to a test coil in the tool, the digital storage oscilloscope card collects waveform signals of the magnetic reed pipe matching with the computer, and the software of th e computer records and analyzes the collected waveform signals of the magnetic reed pipe. The device can detect a defective product of the magnetic reed pipe with abnormal waveform and an attached extraneous matter, and has the advantages of simple structure, convenient use, and the like.
Description
Technical field
The present invention relates to a kind of pick-up unit and detection method of magnetic reed tube, particularly a kind of detection device for dynamical contacting impedance of magnetic reed pipe and detection method thereof.
Background technology
Magnetic reed tube is a kind of magnetic control mechanical switch of hermetically sealing, can be used as magnet proximity switch or relay and use, it is less than common mechanical volume of switch, speed is high, long working life, compares with electronic switch, it has again the strong characteristics of anti-load shock ability, and functional reliability is very high.In mobile phone, satellite antenna, water dispenser, coffee machine, humidifier, programme-controlled exchange, duplicating machine, washing machine etc., be widely used.Magnetic reed switch is a kind of field drives type switch, and it is comprised of the elasticity magnetic red sheet of pair of magnetic material manufacturing, and through that part magnetic red sheet of pressure processing, overlapped and maintenance certain interval is sealed in the glass tube of inert gas.Encapsulation process is to utilize exothermal infraredly, the both sides glass tube is dissolved engage to form.But in encapsulation process, because technological factor, can produce some defectives, comprise contact foreign matter (, other metals and nonmetallic substance broken such as glass), contact coating come off and reed not parallel etc., if there is foreign matter to be present in the magnetic reed tube, light then can make contact resistance (CR) value of magnetic reed tube bigger than normal, serious then can make the long-term short circuit of reed of magnetic reed tube, again or make magnetic reed tube intermittent disabler situation occur.Wherein the contact foreign matter directly affects the quality level of product, so that the magnetic reed tube cisco unity malfunction.These defectives are to occur in the encapsulation process, will remain in after the encapsulation in the glass tube and can't remove, and the most serious problem is not have appropriate method to detect bad magnetic reed tube product, and it is broken down in application process.
Summary of the invention
Technical deficiency for above existence, the object of the present invention is to provide a kind of magnetic reed tube wave form varies of beating during dynamical state in closing course of see through observing, measure its DCR value, thereby detect the pick-up unit that unusual waveform reaches the magnetic reed tube of having foreign matter;
Another object of the present invention is to provide the method that pick-up unit of the present invention detects of using.
Goal of the invention of the present invention is achieved by the following technical solution:
As depicted in figs. 1 and 2, magnetic reed tube dynamic Contact impedance (DCR) pick-up unit comprises power supply 14, computing machine 16 and software 15, numeral is stored oscillograph card 17, microprocessor 10 and solenoid valve controller 9, signal generator 11, tool 3 and cylinder 4, as shown in Figure 2, power supply 14 provides in different DC direct supply each accessory to the DCR self-verifying machine, described microprocessor 10 by with computing machine 16 between the test action of communicating by letter to control whole pick-up unit, after solenoid valve controller 9 receives the electronic control signal that microprocessor 10 sends, change into the control signal that cylinder 4 is suitable for, make cylinder 4 make corresponding action; Behind the test coil 2 of the specific waveforms that the signal generator 11 that is connected with microprocessor 10 produces consecutives to the tool 3, numeral is stored the waveform signal that oscillograph card 17 coupled computers 16 gather magnetic reed tube, will gather the magnetic reed tube waveform signal record of returning and make analysis by computer software 15.
The position regulation of coil 2 can utilize and rotate the screw 7 of adjusting height, by the assistance of anchor post 6 and spring 5, with coil 2 position movements.
Installed the identification id base plate 12 of product additional in described tool 3 bottoms, after tool 3 was put into the DCR inspection machine, it can load corresponding machine program automatically.In addition, consider temperature to the impact of coil resistance, also installed the compensation that temperature sensor 13 is made temperature on coil next door additional.Be provided with the automatically dotting device by tool, non-defective unit has cylinder cooperation and gets pen do identification printing ready after measurement.
Use for many years the experience of magnetic reed tube in conjunction with the inventor, grasped the response characteristic of magnetic reed tube, according to the characteristic of its reaction, designed the DCR inspection machine.It is the self-verifying machine that develops out mainly for detecting the foreign matter in the magnetic reed tube.It has the PI/DO/SCR of measurement magnetic reed tube and the function of DCR value.The PI value is the startup value of a magnetic reed tube, the DO value is the release value of magnetic reed tube, and they are as unit (A=electric current, T=wire circle) with the AT value, when the magnetic field intensity that is produced by coil or magnet had just enough promoted the magnetic reed tube action, this magnetic field intensity just was called the PI value.Otherwise if after the magnetic reed tube conducting, magnetic field intensity begins to weaken, and the magnetic field intensity until magnetic reed tube disconnects (returning to original position) during a moment is called the DO value.
Magnetic reed tube can be divided into two kinds of 2 kinds of patterns-dynamic Contact resistance value (DCR) and Static Contact resistance values (SCR) when measuring contact impedance value (CR), as title, they are to come across on the different time coordinates.Response characteristic based on magnetic reed tube, when it connects electric a moment that reaches in conducting, magnetic reed tube is immediately fully conducting, it must be to pass through first the resilience stage, enter dynamic Contact impedance zone (not complete stability state) after reaching, and just enter static contact impedance zone (complete stability state) at last.
The method that detection device for dynamical contacting impedance of magnetic reed pipe is applied to the magnetic reed tube detection is: passing through to input continuously the waveform of characteristic frequency and given shape to coil, again magnetic reed tube or its relevant components goods are placed the center range of coil, by the output signal of last 10 waveforms of supervision magnetic reed tube, can measure SCR and DCR value.And can utilize the waveform shape that detects to go to judge whether magnetic reed tube belongs to normal or existing problems with the time.Mixed and disorderly such as the waveform after the resilience, the amplitude of beating is very large, and can be has foreign matter to exist.If the waveform after the resilience is mixed and disorderly, but the amplitude of beating is less, then can be that poor plating or reed are asymmetric.And if very level and smooth after the resilience, namely the waveform of back segment is more steady, then belongs to non-defective unit.
Measured data are that the checkout facility (the LabVIEW software and the waveform signal capture card that cooperate specialty) via robotization goes to judge the good with bad of magnetic reed tube.
Figure of description
Fig. 1 is the structural representation of magnetic reed tube dynamic Contact of the present invention impedance (DCR) pick-up unit;
Fig. 2 is the functional block diagram of magnetic reed tube dynamic Contact of the present invention impedance (DCR) pick-up unit;
Fig. 3 is bourdon tube response characteristic curve map to be measured;
Fig. 4 is bourdon tube PI to be measured, and DO measures curve map;
Fig. 5 is that bourdon tube DCR to be measured measures curve map;
Fig. 6 is that bourdon tube SCR to be measured measures curve map;
Fig. 7 is the measurement curve map of bourdon tube remanent magnetism to be measured.
The number in the figure explanation
1-spring goods to be measured 2-test coil 3-tool 4-cylinder
The action of 5-spring 6-anchor post 7-screw 8-cylinder
9-solenoid valve controller 10-microprocessor 11-signal generator 12-identifies base plate
13-temperature sensor 14-power supply 15-waveform is judged software
16-computing machine 17-numeral is stored the oscillograph card
Embodiment
How further specify the present invention below in conjunction with accompanying drawing realizes:
Embodiment
Magnetic reed tube or magnetic reed tube goods are connected the 5V power supply and can produce in the circuit of about 50mA electric current, then it is positioned over the center of coil.
1.PI DO measures (as shown in Figure 4):
Inceptive impulse to the coil of inputting first forward (1) makes the magnetic reed tube starting, then begins to begin to increase by little level the electric current of (2) coil, after the PI value that finds forward, again by the current direct of little level minimizing (3) coil till find the DO value.After positive test is finished, just begin to measure the part of negative sense, inceptive impulse to the coil of input negative sense (4) makes the magnetic reed tube starting, then begin to begin to increase by little level the electric current of (5) coil, after the PI value that finds negative sense, the current direct that reduces (6) coil by little level again is till find the DO value.The benefit of doing simultaneously the test of forward and negative sense is that the earth is that south poles magnetic field is arranged, and different places uses identical goods all may have different performance datas, and therefore, the PI/DO value of consideration is to take from the mean value of forward and negative sense.And the benefit that adds inceptive impulse is to make the magnetic reed tube to be measured can be to test under the more stable state.
2.DCR measure (as shown in Figure 5):
Input the signal of minimum 60 characteristic frequency and waveform shape (7) to coil, the amplitude of waveform be before about 1.4 times of measured PI value, such setting can make magnetic reed tube measure dynamic CR value in more stable situation, the last reaction signal that only adopts last 10 waveforms, particular range at signal, measure dynamic contact resistance (DCR) value of each reaction signal, and these numerical value just draw the DCR value after being averaged.
3. the judgement of waveform:
By a series of test, known the normergic state of magnetic reed tube, by measurement data, therefrom can select the magnetic reed tube of some less stables.Defined some bad waveform states, the state that can therefrom assess defective products is that to come from which kind of reason-such as foreign matter and electrodeposited coating bad etc.
4.SCR measure (as shown in Figure 6)
Input the signal of minimum 10 characteristic frequency and waveform shape (8) to coil, the amplitude of waveform be before about 1.4 times of measured PI value, such setting can make magnetic reed tube measure dynamic CR value in more stable situation, the last reaction signal that only adopts last 10 waveforms, in the particular range of signal (2/3 position of pulse begins to get a little), measure Static Contact resistance (SCR) value of each reaction signal, and just draw the SCR value after these numerical value are averaged.
5. the measurement of remanent magnetism (as shown in Figure 7)
Magnetic reed tube is after test repeatedly in principle, and it remains the stable of the utmost point, the method for this measurement be to compare magnetic reed tube the measured PI value of project 1 whether with project 5 (at last) measured be identical.Method is the same with project 1, and inceptive impulse to the coil of inputting first forward (9) makes the magnetic reed tube starting, then begins to begin to increase by little level the electric current of (10) coil, till the PI value that finds forward.
Claims (4)
1. detection device for dynamical contacting impedance of magnetic reed pipe, comprise power supply, computing machine and software, numeral is stored oscillograph card, microprocessor and solenoid valve controller, signal generator, tool and cylinder is characterized in that: described microprocessor by with computing machine between the test action of communicating by letter to control whole pick-up unit, after solenoid valve controller receives the electronic control signal that microprocessor sends, change into the applicable control signal of cylinder, make cylinder make corresponding action; Behind the test coil of the specific waveforms that the signal generator that is connected with microprocessor produces consecutive to the tool, numeral is stored the waveform signal that oscillograph card coupled computer gathers magnetic reed tube, will gather the magnetic reed tube waveform signal record of returning and make analysis by computer software.
2. a kind of detection device for dynamical contacting impedance of magnetic reed pipe according to claim 1 is characterized in that: the test coil in the described tool is provided with screw, anchor post and the spring of the rotation adjustment height of adjusting coil position.
3. a kind of detection device for dynamical contacting impedance of magnetic reed pipe according to claim 1 is characterized in that: the identification base plate that has installed product in described tool bottom additional.
4. a kind of detection device for dynamical contacting impedance of magnetic reed pipe according to claim 1 is characterized in that: at described test coil one side mounting temperature sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810037015 CN101576524B (en) | 2008-05-06 | 2008-05-06 | Detection device for dynamical contacting impedance of magnetic reed pipe and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810037015 CN101576524B (en) | 2008-05-06 | 2008-05-06 | Detection device for dynamical contacting impedance of magnetic reed pipe and detection method thereof |
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| CN101576524A CN101576524A (en) | 2009-11-11 |
| CN101576524B true CN101576524B (en) | 2013-05-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091696A (en) * | 2010-12-30 | 2011-06-15 | 今皓光电（昆山）有限公司 | Automatic SR dotting jig |
| CN105203892A (en) * | 2015-10-30 | 2015-12-30 | 江西金程智能科技有限公司 | Reed switch characteristic testing method and reed switch characteristic tester |
| CN110231561A (en) * | 2019-06-17 | 2019-09-13 | 王爱华 | A kind of method of magnetic reed switch test |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6294971B1 (en) * | 2000-07-21 | 2001-09-25 | Kearney-National Inc. | Inverted board mounted electromechanical device |
| CN2670940Y (en) * | 2003-12-04 | 2005-01-12 | 技嘉科技股份有限公司 | Tester of circuit board |
| CN101151525A (en) * | 2005-04-05 | 2008-03-26 | 哈拉尔·霍恩 | Method and device for measuring the condition of steel structures |
| CN201247217Y (en) * | 2008-05-06 | 2009-05-27 | 冉芸华 | Detection device for magnetic reed pipe dynamic contact impedance |
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- 2008-05-06 CN CN 200810037015 patent/CN101576524B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6294971B1 (en) * | 2000-07-21 | 2001-09-25 | Kearney-National Inc. | Inverted board mounted electromechanical device |
| CN2670940Y (en) * | 2003-12-04 | 2005-01-12 | 技嘉科技股份有限公司 | Tester of circuit board |
| CN101151525A (en) * | 2005-04-05 | 2008-03-26 | 哈拉尔·霍恩 | Method and device for measuring the condition of steel structures |
| CN201247217Y (en) * | 2008-05-06 | 2009-05-27 | 冉芸华 | Detection device for magnetic reed pipe dynamic contact impedance |
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Effective date of registration: 20180723 Address after: 518101 B14, B19 Tung, B18 building, Hengzhou industrial estate, Hang Zhou, Baoan District City, Shenzhen, Guangdong Patentee after: Aleph Electronics (Shenzhen) Co., Ltd. Address before: 518126 coconut coast C2-13BF, 269 Taoyuan West Road, Nanshan District, Shenzhen, Guangdong Patentee before: Ran Yunhua |