CN201247217Y

CN201247217Y - Detection device for magnetic reed pipe dynamic contact impedance

Info

Publication number: CN201247217Y
Application number: CNU2008200580666U
Authority: CN
Inventors: 洪应军; 陈育权
Original assignee: RAN YUNHUA
Current assignee: RAN YUNHUA
Priority date: 2008-05-06
Filing date: 2008-05-06
Publication date: 2009-05-27
Anticipated expiration: 2018-05-06

Abstract

The utility model discloses a detecting device of the dynamic contact impedance of a magnetic reed tube, the device comprises a power supply, a computer and software, a digital storing card of an oscilloscope, a microprocessor and a magnetic valve controller, a signal generator, a tool and a cylinder, wherein the microprocessor controls the detecting action of the whole detecting device through communicating with the computer, after the magnetic valve controller receives electronic control signals which are emitted by the microprocessor, the electronic control signals are converted into control signals which are used for the cylinder, which enables the cylinder to carrying out the corresponding action, after the signal generator which is connected with the microprocessor generates a series of specific waveform to a detecting coil in the tool, the digital storing card of the oscilloscope collects waveform signals of the magnetic reed tube through matching with the computer, and the waveform signals of the magnetic reed tube which are collected by computer software are recorded and analyzed. The utility model has the advantages that non-conforming articles of the magnetic reed tube which are attached with foreign materials and whose waveform is abnormal can be detected, the structure is simple, the use is convenient and the like.

Description

A kind of detection device for dynamical contacting impedance of magnetic reed pipe

Technical field

The utility model relates to a kind of pick-up unit of magnetic red pipe, particularly a kind of detection device for dynamical contacting impedance of magnetic reed pipe.

Background technology

The magnetic red pipe is a kind of magnetic control mechanical switch of hermetically sealing, can be used as magnet proximity switch or relay and use, it is littler than common mechanical volume of switch, speed is high, long working life, compares with electronic switch, it has the strong characteristics of anti-load shock ability again, and functional reliability is very high.In mobile phone, satellite antenna, water dispenser, coffee machine, humidifier, programme-controlled exchange, duplicating machine, washing machine etc., obtained using widely.Magnetic reed switch is a kind of field drives type switch, and it is made up of the elasticity magnetic red sheet of pair of magnetic made, 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) as glass, contact coating come off and reed not parallel etc., if there is foreign matter to be present in the magnetic red pipe, light then can make contact resistance (CR) value of magnetic red pipe bigger than normal, serious then can make the long-term short circuit of reed of magnetic red pipe, again or make the magnetic red pipe intermittent disabler situation occur.Wherein the contact foreign matter directly influences the quality level of product, so that magnetic red pipe 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 red pipe product, and it is broken down in application process.

Summary of the invention

Technical deficiency at above existence, the purpose of this utility model is to provide a kind of seeing through to observe magnetic red pipe wave form varies of beating during dynamical state in closing course, measure its DCR value, thereby detect the pick-up unit that abnormal waveforms reaches the magnetic red pipe of having foreign matter;

Another purpose of the present utility model is to provide the method that the utility model pick-up unit detects of using.

Goal of the invention of the present utility model is achieved by the following technical solution:

As depicted in figs. 1 and 2, the dynamic contact impedance of magnetic red pipe (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 communicate by letter and control the test action of 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 that is connected with microprocessor 10 11 produces consecutives to the tool 3, numeral is stored the waveform signal that oscillograph card 17 coupled computers 16 are gathered the magnetic red pipe, will gather the magnetic red tube wave shape 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, coil 2 positions is moved.

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 the influence of temperature, also installed temperature sensor 13 additional on the coil next door and made Temperature Compensation the coil resistance.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 the experience of magnetic red pipe for many years in conjunction with the inventor, grasped the response characteristic of magnetic red pipe,, designed the DCR inspection machine according to its reaction properties.It is to be primarily aimed at the self-verifying machine that detects the foreign matter in the magnetic red pipe and develop out.It has the PI/DO/SCR of measurement magnetic red pipe and the function of DCR value.The PI value is the startup value of a magnetic red pipe, the DO value is the release value of magnetic red pipe, and they are as unit (A=electric current, T=wire circle) with the AT value, when just enough having been promoted the action of magnetic red pipe by the magnetic field intensity that coil or magnet produced, this magnetic field intensity just is called the PI value.Otherwise if after the conducting of magnetic red pipe, magnetic field intensity begins to weaken, and disconnects (returning to original position) magnetic field intensity during a moment until the magnetic red pipe and just is called the DO value.

The magnetic red pipe can be divided into two kinds of 2 kinds of patterns-dynamic contact impedance 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 the magnetic red pipe, when it connects electric a moment that reaches in conducting, the magnetic red pipe is conducting fully immediately, it must be earlier through 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 detection of magnetic red pipe is: passing through to import the waveform of characteristic frequency and given shape continuously to coil, again magnetic red pipe or its relevant components goods are placed the center range of coil, by the output signal of last 10 waveforms of supervision magnetic red pipe, can measure SCR and DCR value.And can utilize the waveform shape that is detected to go to judge whether the magnetic red pipe belongs to normal or existing problems with the time.Mixed and disorderly as the waveform after the resilience, the amplitude of beating is very big, 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, promptly 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 red pipe.

Figure of description

Fig. 1 is the structural representation of the dynamic contact impedance of the utility model magnetic red pipe (DCR) pick-up unit;

Fig. 2 is the functional block diagram of the dynamic contact impedance of the utility model magnetic red pipe (DCR) pick-up unit;

Fig. 3 is a 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 2-test coil 3-tool 4-cylinder to be measured

The action of 5-spring, 6-anchor post, 7-screw, 8-cylinder

9-solenoid valve controller, 10-microprocessor, 11-signal generator 12-identification 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 utility model below in conjunction with accompanying drawing realizes:

Embodiment

Magnetic red pipe or magnetic red tubing products 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 input forward (1) makes the starting of magnetic red pipe earlier, and the beginning begins to increase by little level the electric current of (2) coil then, after the PI value that finds forward, reduces the electric current of (3) coil till finding the DO value by little level again.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 starting of magnetic red pipe, and the beginning begins to increase by little level the electric current of (5) coil then, after the PI value that finds negative sense, reduce the electric current of (6) coil till finding the DO value by little level again.The benefit of doing the test of forward and negative sense simultaneously 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 red pipe to be measured can be more to test under the stable status.

2.DCR measure (as shown in Figure 5):

The signal of importing minimum 60 characteristic frequency and waveform shape (7) is to coil, the amplitude of waveform be before about 1.4 times of measured PI value, such setting can make the magnetic red pipe measure dynamic CR value under 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 red pipe, by measurement data, therefrom can select the magnetic red pipe 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-as foreign matter and electrodeposited coating bad etc.

4.SCR measure (as shown in Figure 6)

The signal of importing minimum 10 characteristic frequency and waveform shape (8) is to coil, the amplitude of waveform be before about 1.4 times of measured PI value, such setting can make the magnetic red pipe measure dynamic CR value under 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)

The magnetic red pipe is after test repeatedly in principle, and it remains the stable of the utmost point, the method for this measurement be to compare the magnetic red pipe 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 input forward (9) makes the starting of magnetic red pipe earlier, begins to increase by little level the electric current of (10) coil then, till the PI value that finds forward.

Claims

1, a kind of detection device for dynamical contacting impedance of magnetic reed pipe, comprise power supply, computing machine, 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 communicate by letter and control the test action of whole pick-up unit, after solenoid valve controller receives the electronic control signal that microprocessor sends, change into the control signal that cylinder is suitable for, 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 is gathered the magnetic red pipe, will gather the magnetic red tube wave shape 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.

5, a kind of detection device for dynamical contacting impedance of magnetic reed pipe according to claim 1 is characterized in that: be provided with the automatically dotting device on institute tool next door, this device is by cylinder and get ready and form.