CN209623746U - Proximity sensor is close to threshold variations point test macro - Google Patents

Abstract

A kind of nearly sensor disclosed by the utility model is close to threshold variations point test macro, it is intended to which it is simple to provide a kind of structure, and adjustment is simple, conveniently, fast to zero reaction, test accurately and reliably test macro of the test proximity sensor close to threshold variations point.The utility model is achieved by following technical proposals: fixing tool is by holding the electronic trapezoidal draw runner (8) to connection, electronic trapezoidal draw runner (8) connects the sliding block (16) on electronic slide unit (12) by transition connecting rod (13), electronic slide unit is connected single chip control unit (9) by driver (15), single chip control unit input terminal connects the proximity sensor detection device (11) being placed in high/low temperature control cabinet (10), output end connects proximity sensor and target of the clamping on fixing tool by return wire, another conducting wire on proximity sensor detection device output end is connected directly between on target, proximity sensor is collectively constituted close to threshold variations point detection system.

Description

Proximity sensor is close to threshold variations point test macro

Technical field

The utility model relates to one kind can be widely applied to the industries such as logistics, manufacture, metallurgy, chemical industry, light textile and printing, In It can be used as what the functions link such as limit, location control, quality testing, counting and automatic protection used in various automatic control systems Proximity sensor system is mainly used for proximity sensor system high and low temperature environment and accurately tests its Ga point, especially high/low temperature Proximity sensor system test system under (also referred to as full temperature) environment.

Background technique

Proximity sensor is that one kind can detect without any physical contact and report attachment object existing switch.It is close Formula sensor is also known as contactless proximity sensor, is to be applied to stroke control, positioning accuracy, the position of accurate response movement mechanism With the electronic switch quantity sensor of stroke.Proximity sensor is in addition to it can complete stroke control and position limitation protection, or one kind The detection device of non-contact type as detection part size and tests the speed, it can also be used to which frequency conversion counter, variable-frequency pulse occur Device, level control and automatic linking of processing program etc..There is the positive logic way of output by output signal classification, sensor sensing arrives When signal, output from 0 jump at 1 and negative logic way of output sensor sensing arrive signal when, output from 1 jump at 0.By letter Number transmission mode is divided into wired transmission, and inductive head signal and postpositive disposal electronic circuit are connected directly and Wireless transceiver, uses Object test in movement, or cannot occasion that is close, being unable to line.Common proximity sensor part is by higher-order of oscillation electricity Road, detecting circuit, amplifying circuit, shaping circuit and output circuit composition.Sensing element is detection coil, it is oscillating circuit One component part.When the close detection coil for being connected with AC signal of metal object, vortex will be generated and absorb energy, made The oscillations of oscillating circuit are so that failure of oscillation.Oscillation is converted into switching signal output through detection circuit with both states of failure of oscillation. The test side of capacitive approach switch capacitance-type switch is usually a pole plate for constituting capacitor, and another pole plate is then opened The shell of pass.Normally grounded in the measurement process or casing with equipment of its shell is connected.When there is object to shift to close switch, No matter whether it is conductor, all the dielectric constant of capacitor can be made to change, to make capacitance change, with measuring head phase Circuit state also can change therewith, thus can control switch be switched on or switched off.Photoelectric proximity switch utilizes Photoelectric effect production close to switch optoelectronic switch.Generally it is made of light source, optical path and photoelectric device three parts.It can divide For direct projection (transmission) type and two kinds of reflection-type, structure has two class of divergence type and integrated type.The title of automatic light source is active, benefit The title passive-type detected with external light source.When there is object to be detected close, photoelectric device has signal output, thus " can feel Know " object it is close.It determines sensitivity and what sensitivity was closely related is range ability, when one timing of the range of linearity, sensor Sensitivity it is higher, interference noise is bigger, drift input quantity it is constant in the case where, output quantity claims with time change, this phenomenon For drift.The drift of sensor refers to that in the case where input quantity is constant, sensor output quantity claims with time change, this phenomenon For drift.There are two aspects for the reason of generating drift: first is that sensor self structure parameter；(such as temperature, wet second is that ambient enviroment Degree etc.).The most common drift is temperature drift, i.e., ambient temperature changes and causes the variation exported, and temperature drift is main Show as temperature null offset and temperature sensitivity drift.Temperature drift usually uses working sensor environment temperature to deviate standard ring The ratio between the variable quantity of output valve when border temperature (generally 20 DEG C) and temperature variation (ξ) indicate.The one of proximity sensor A characteristic is: its sensitive surface size at a distance from face target determines the size of proximity sensor outputting inductance value.Close to biography The locating temperature field of sensor also determines the numerical values recited of its outputting inductance value and self-resistance value.The frequency response of sensor is special Property quality depends primarily on the natural frequency ω n and damping ratio ξ of sensor.Proximity sensor is divided into inductive type according to testing principle With it is capacitive.Inductive type proximity sensor (such as E2E) can only detect metal, cannot detect nonmetallic.Capacitive proximity sensor (such as E2K) can detecte metal and nonmetallic.Difference of the proximity sensor of both the above type according to testee material, inspection Ranging is different from also.Detecting distance is distance of the detectable substance surface to transducer probe face.Set distance is detectable substance surface It can be with the distance of stable detection to transducer probe face.About the 70%~80% of detecting distance.When object enters centainly When distance threshold, object of the detection in.This object is referred to as " close " or " neighbouring " sensor (proximity test threshold value). Detection zone is left or removed to detection object.This object is referred to as " separate " sensor (proximity test threshold value).Measurand Test object surface can be made to generate eddy current close to high frequency magnetic field, and eddy current can cause contrary magnetic field.Critical Output is had in one segment limit of detecting distance, for example detecting distance is the product of 3mm, in the range of one section of very little of 3mm or so It is interior, that is, unstable detection zone, self diagnosis, which exports, has output, informs that the distance detected now is unstable.

Modern civil aircraft undercarriage control includes normal folding and unfolding and emergency release two systems.Landing gear control system exists Flight By Wire is used on maneuverability pattern, and realizes and is crosslinked with other systems, and inductive proximity sensor is widely used for detecting The position of undercarriage.Proximity sensor work when temperature and product around environment temperature have it is close contact, when environment temperature Spend higher or heat dissipation it is difficult when, proximity sensor when working generated thermal energy be difficult to distribute, proximity sensor temperature will be made Degree increases.Since the component in proximity sensor has certain normal working temperature range, if (most more than its limiting temperature It is high or minimum) it is necessary to cause the change of working condition, the lost of life is even damaged.Influence of the temperature to proximity sensor is main Show: electric property changes, noise increases etc., and proximity sensor internal component is damaged when serious.Proximity sensor and its Detection system environmental work difference is big, and -55 DEG C of low temperature, the requirement of high temperature is different.For examine sensor temperature environment adaptability, The test of temperature environment is an important content, and the temperature environment test of simulation and realization the two uses common thermocycling Case.The characteristic index of proximity sensor and its detection system is contained close to threshold variations Ga point.To proximity sensor and its inspection For examining system, Ga point is distance of the proximity sensor with respect to target by far from towards close to movement, what detection system was tested is connect Close threshold variations point.It is it from separate towards close transition point close to threshold variations Ga point, is characterization proximity sensor itself The parameter of characteristic；Under high/low temperature temperature environment, need to carry out to close to sensor detecting device close to threshold variations Ga point Test, it is thus necessary to determine that proximity sensor is actual close to threshold variations with respect to the correspondence of target test under the conditions of different temperature Ga point.Testing close to threshold variations Ga point for the high and low temperature environment of proximity sensor and its detection system is carried out before, using position Platform is moved, the structure of displacement platform is the mechanical roll adjustment of X, Y coordinates plane, the test of Ga point when for room temperature.Because of robot Work roll adjustment is not suitable with high/low temperature condition, while needing to be opened and closed thermocycling chamber door in test and the temperature inside the box field is easily caused to become Change, while door of unpacking under low temperature also results in displacement platform frosting and can not work, therefore tests proximity sensor in high/low temperature item The approximation method used under part, the range data inaccuracy of test.In practical engineering application test, corresponding testing equipment is needed Meet the test under different temperature environments under the conditions of the different distance of proximity sensor and target, especially under high/low temperature, It is required that proximity sensor system testing distance is accurate, the utility model realizes the purpose.

Utility model content

Under the conditions of solving high and low temperature environment, tests the displacement platform used and vary with temperature to expand with heat and contract with cold and cause Test benchmark variation causes the test of Ga point error occur, and the utility model aim is, it is simple to provide a kind of structure, adjustment letter Singly, conveniently, fast to zero reaction, measuring distance is accurate, and target and proximity sensor sensitive surface distance controlling are accurate, and precision is high, Test macro of the reliable test proximity sensor of measurement close to threshold variations point.

The utility model is reached by following measures, and a kind of nearly sensor has close to threshold variations point test macro Following technical characteristic: the fixing tool of preparation one horizontal clamping proximity sensor 4 and target 5, and fixing tool is placed in height In the thermocycling field of low-temperature test chamber 1, fixing tool is connected by electronic trapezoidal draw runner 8 from end to connection and transition connecting rod 13 Connect the sliding block 16 on electronic slide unit 12, electronic slide unit 12 is connected single chip control unit 9 by driver 15, and single-chip microcontroller control is single First 9 input terminals connect the proximity sensor detection device 11 being placed in high/low temperature control cabinet 10, and output end is connected by return wire It is hinged with the proximity sensor 4 and target 5 being clipped on fixing tool, another on 11 output end of proximity sensor detection device is led Line is connected directly between on target 5, collectively constitutes threshold variations point detection system；Single chip control unit 9 is controlled by driver 15 The sliding block 16 on electronic slide unit 12 is made, the target connecting rod 6 being connected through transition connecting rod 13 drives target 5 to move, and detects and proofreads and connects The zero distance of contact is aligned between nearly sensor 4 and the induction of target 5 end face；After completing zero point contraposition, single chip control unit 9 is logical Device 15 of overdriving controls starting, the operation, stopping that electronic draw runner 8 slides, and advance is tested with retrogressing, controls target 5 and connects The test starting and starting return-to-zero of nearly sensor 4；In high and low temperature environment, target 5 under the instruction of single chip control unit 9, It is moved from the position far from proximity sensor 4 to proximity sensor 4, proximity sensor detection device 11 passes through the electricity in circuit Pressure comparator is compared with preset critical electrical parameter, periodically resolves the critical electrical parameter of proximity sensor 4；When close The critical electrical parameter of sensor 4 occur compared with critical electrical parameter preset in circuit it is identical when, compare occur circuit overturning, produce The variation of the low and high level of raw output on-off model, and it is introduced into conduct in the test circuit of single chip control unit 9 The foundation of critical point Ga, it is defeated when detection target 5 moves to critical point Ga close to apart from corresponding electric signal with proximity sensor 4 Outlet level is reduced to ground, then it represents that position locating for target 5 is critical point Ga point at this time.

The utility model has the advantages that compared with the prior art.

The utility model is using the power source mobile as target 5 and displacement measurement unit (i.e. driver 15 and electronic slide unit 12) it is placed in outside the case of high-low temperature test chamber 1, target 5 and proximity sensor 4 pass through thermocycling by return wire 2 respectively The power supply string holes of case 1 are drawn out to outside case, are not influenced by 1 the temperature inside the box of high-low temperature test chamber.Proximity sensor 4, target 5, target Mark connecting rod 6, electronic trapezoidal draw runner 8, transition connecting rod 13, sliding block 16, electronic slide unit 12, driver 15, single chip control unit 9, Proximity sensor detection device 11 collectively constitutes proximity sensor that target temperature field can be set close to threshold variations point detection system System, test is accurate, and mechanism is simple, and it is convenient to realize, at low cost.

Adjustment is simply, conveniently.The utility model is by target 5 and proximity sensor 4 together with 14 fixing tool one of flat base It rises, is placed in the thermocycling field of high-low temperature test chamber 1, in high and low temperature environment, target 5 is in advance far from proximity sensor 4, by the sensitive surface of the induction end face of proximity sensor 4 and target 5 to zero, positional distance precise control, precision are high, adjustment letter Singly, it conveniently, gives and realizes simplicity.The prior art is solved using X, Y coordinates in-plane displancement platform, mechanical roll adjustment is complicated, mechanical The problem of artificial roll adjustment is not suitable with high/low temperature condition.It is easy to avoid the chamber door for needing to be opened and closed high-low temperature test chamber 1 when test simultaneously The temperature inside the box field is caused to change, door of unpacking under low temperature will lead to displacement platform frosting can not work problem.

Fast to zero reaction, measuring distance is accurate.To realize the accurate of proximity sensor system testing its Ga point under high/low temperature Property, the utility model using single chip control unit 9 by driver 15 control electronic slide unit 12, sliding block 16, transition connecting rod 13, Electronic trapezoidal draw runner 8, target connecting rod 6, and then starting, operation, stopping, advance and the retrogressing of target 5 is driven to be tested；Simultaneously During the work of whole system, because of the variation of target temperature point, with the variation and stabilization in temperature field, single-chip microcontroller control is single Member 9 can control zero reset and the test of target 5 and proximity sensor 4 any time, fast to zero reaction, high-acruracy survey The measuring distance of proximity sensor 4 and target 5；Single chip control unit 9 is real under the action of driver 15 and electronic slide unit 12 Existing precise motion and positioning, distance are counted with zero point, and the distance of move distance zero point is known and accurate.

Detailed description of the invention

Fig. 1 is detection system of the utility model test proximity sensor close to threshold variations point.

Fig. 2 is the circuit theory schematic diagram of Fig. 1.

Fig. 3 is the flat base fixing tool main view of clamping proximity sensor and target.

Fig. 4 is the sectional view along A-A of Fig. 2.

Fig. 5 is the electrical connection schematic diagram of single chip control unit Yu displacement measurement unit.

In figure: 1 high-low temperature test chamber, 2 return wires, 3 mounting frame for sensor, 4 proximity sensors, 5 targets, 6 targets Connecting rod, 7 rectangular platforms, 8 electronic trapezoidal draw runners, 9 single chip control units, 10 high/low temperature control cabinets, the detection of 11 proximity sensors Device, 12 electronic slide units, 13 transition connecting rods, 14 flat bases, 15 drivers, 16 sliding blocks.

The utility model is further illustrated with reference to the accompanying drawings and examples, but is not therefore limited in the utility model Among the embodiment described range.

Specific embodiment

Refering to fig. 1.According to the utility model, the fixing tool of horizontal a clamping proximity sensor 4 and target 5 is prepared, And fixing tool is placed in the thermocycling field of high-low temperature test chamber 1, fixing tool is by holding to the electronic trapezoidal of connection Draw runner 8 and transition connecting rod 13 connect the sliding block 16 on electronic slide unit 12, and electronic slide unit 12 is connected single-chip microcontroller control by driver 15 Unit 9 processed, 9 input terminal of single chip control unit connect the proximity sensor detection device 11 being placed in high/low temperature control cabinet 10, Output end connects proximity sensor 4 and target 5 of the clamping on fixing tool, proximity sensor detection device by return wire Another conducting wire on 11 output ends is connected directly between on target 5, collectively constitutes threshold variations point detection system.

Single chip control unit 9 controls the sliding block 16 on electronic slide unit 12 by driver 15, is connected through transition connecting rod 13 Target connecting rod 6 drive target 5 to move, detect and proofread proximity sensor 4 and target 5 and incude the zero point for aligning contact between end face Distance；After completing zero point contraposition, single chip control unit 9 controlled by driver 15 starting that electronic draw runner 8 slides, operation, Stop, advance is tested with retrogressing, controls the test starting and starting return-to-zero of target 5 and proximity sensor 4；In high/low temperature ring In border, target 5 is moved under the instruction of single chip control unit 9 from the position far from proximity sensor 4 to proximity sensor 4, Proximity sensor detection device 11 is compared by the voltage comparator in circuit with preset critical electrical parameter, periodically Resolve the critical electrical parameter of proximity sensor 4；When preset in circuit face occurs compared with for the critical electrical parameter of proximity sensor 4 When boundary's electrical parameter is identical, compares and circuit overturning occurs, generate the variation of the low and high level of output on-off model, and is introduced into Foundation into the test circuit of single chip control unit 9 as critical point Ga, detection target 5 are moved to proximity sensor 4 When critical point Ga is close to apart from corresponding electric signal, output end level is reduced to ground, then it represents that position locating for target 5 is at this time It is critical point Ga point.

Single chip control unit 9 controls electronic slide unit 12, sliding block 16, transition connecting rod 13, electronic trapezoidal by driver 15 Draw runner 8, target connecting rod 6, and then drive starting, operation, stopping, advance and the retrogressing of target 5.In different temperature environments, Proximity sensor 4, target 5, target connecting rod 6, electricity because of the variation and stabilization of target temperature point, in high-low temperature test chamber 1 The trapezoidal meeting of draw runner 8 is moved with the variation of temperature and stablizes the new equilibrium state to expand with heat and contract with cold of arrival component, must be carried out at this time The check and correction again of zero distance point (i.e. zero point).

Under the conditions of a certain steady temperature field, single chip control unit 9 controls electronic slide unit 12 by driver 15 and acts, And then target 5 is driven to move, when zero point contraposition to be carried out, single chip control unit 9 is according to the electrical circuit of return wire 2 first No connection test target 5 is contacted with proximity sensor 4, if electrical circuit is connected, then it is assumed that and target 5 has been contacted with proximity sensor 4, Target 5 is then moved towards the direction far from proximity sensor 4, and after moving 2cm, target 5 delays from far near towards 4 direction of proximity sensor Slow movement, target 5 are moving simultaneously, and whether both detections of single chip control unit 9 contact；When the two Contact, single-chip microcontroller Control unit 9 detects that the electrical circuit of the return wire 2 of target 5 and proximity sensor 4 is connected, and single chip control unit 9 is then sent out Target 5 moves halt instruction out, and target 5 then moves stopping, at this time the sensitive surface of the induction end face and target 5 of proximity sensor 4 Contact distance be 0mm, as zero point completes zero point contraposition at this time.

Later during the work of whole system, because of the variation of target temperature point, the variation and stabilization in adjoint temperature field, Single chip control unit 9 can control zero reset and the test of target 5 and proximity sensor 4 any time.Single-chip microcontroller control Unit 9 processed is in driver 15 and realizes that precise motion and positioning, distance are counted with zero point under the action of electronic slide unit 12, movement away from It is known and accurate with a distance from zero point.

Refering to Fig. 2.In test of the proximity sensor close to threshold variations point detection system, the signal of proximity sensor 4 Proximity sensor detection device 11 is accessed by cable；Target 5 is from the position far from proximity sensor 4 in single chip control unit It is moved under 9 instruction to proximity sensor 4, proximity sensor detection device 11 periodically resolves the critical of proximity sensor 4 Electrical parameter, the parameter are compared in the circuit of proximity sensor detection device 11 with preset parameter；When the induction of target 5 When face is run to the induction end identity distance of proximity sensor 4 from for Ga, the critical electrical parameter of proximity sensor 4 with it is pre- in circuit Set that parameter is identical, the circuit of proximity sensor detection device 11 compares through voltage comparator occurs circuit overturning, generates output and opens The variation of the low and high level of signal is measured in pass, and the test circuit that the variation of the on-off model is introduced into single chip control unit 9 is made For the foundation of Ga point, single chip control unit 9 detects that the variation of the on-off model then indicates the location of target 5 at this time It is Ga point, target 5 is Ga at a distance from proximity sensor 4, which is exactly proximity sensor system close to distance, because For electronic slide unit 12, positional distance is determining and it is known that the then distance energy of Ga point under the control of single chip control unit 9 It is enough to obtain.

The controller of single chip control unit 9 can use the single-chip microcontroller D1 of model C8051F310, the control of single-chip microcontroller Line P1.2, P1.3 are separately connected the 2 of XS3 connector, 3 pins, respectively as the control clockwise and counterclockwise of subsequent driver 15 Tubulation foot.

The asynchronous all the way of single-chip microcontroller, full duplex serial port UART0 export RS232 signal, by the port P0.4, P0.5, pass through Model MAX232CPE serial port chip N1 exports RS232 signal, connects host computer, and RS232 signal is sent into upper calculating Machine.Single-chip microcontroller receives the positional distance control instruction from host computer by serial port chip N1, while will with interrogation reply system The positional distance signal of target feeds back to host computer.The periphery MAX232CPE serial port chip N1 meets the 0.1uf of C1~C5 respectively Capacitor, this is the preferred circuit connection of MAX232CPE serial port chip.

P2.0 mouthfuls of single-chip microcontroller contact the return-to-zero signal end connected in place as target 5 with proximity sensor 4, booting be powered or Any time, it can receive and reset control instruction, single chip control unit 9 passes through driver 15,12 band of electronic slide unit first Moving-target mark 5 moves, and moves to right target 5 close to proximity sensor and incudes end face, when target 5 and the sensitive surface of proximity sensor 4 connect The electrical circuit of touching, the circuit a and circuit b of return wire 2 is connected, low in P2.0 mouthfuls of generations of single-chip microcontroller by TLP185 optocoupler E1 Level reset signal, the positional distance of target 5 and proximity sensor 4 is 0mm, electronic 12 stop motion of slide unit at this time.

Proximity sensor detection device can be caused to export when target 5 and 4 distance of proximity sensor move to critical point Ga The low and high level of on-off model change, which reaches the pin 2 and pin 3 of connector XS4.Target 5 When moving to critical point Ga with 4 distance of proximity sensor, low and high level is changed opens for the output of proximity sensor detection device Signal is measured in pass, the high level of switching value is added to the input circuit of TLP185 optical coupler E2 by resistance R3, which has electric current Passing through, the output loop of optical coupler E2 is connected, and output end level is reduced to ground, which is obtained by single-chip microcontroller P1.7, It is considered that target 5 and 4 distance of proximity sensor move to the corresponding electric signal of critical point Ga.

Refering to Fig. 3~Fig. 4.Fixing tool includes: that proximity sensor 4 is horizontally fixed on flat base 14 by pilot hole Nonmetallic mounting frame for sensor 3, be parallel to mounting frame for sensor 3, the rectangular platform being fixed on flat base 14 7, with proximity sensor 4 it is opposite it is coaxial be isolated, the electricity in dovetail groove sliding rail is assemblied in by 7 top dovetail groove sliding rail of rectangular platform Trapezoidal draw runner 8 is moved, the axial connection target connecting rod 6 of electronic trapezoidal draw runner 8 is relatively close to 4 sensitive surface of sensor, target 5 is fixed on The rod end of target connecting rod 6, proximity sensor 4, target 5, target connecting rod 6 and coplanar 14 regular worker of pedestal of electronic trapezoidal draw runner 8 Dress is placed in together in the thermocycling field of high-low temperature test chamber.

Refering to Fig. 5.Electronic slide unit 12 connects driver 15 and forms displacement measurement unit, single chip control unit 9 with it is electronic The matching crosslinking of slide unit 12.Driver 15 can use model ARD-K chip driver, and electronic slide unit can use model The electronic slide unit chip of EASM4YE070ARAK.Electronic slide unit 12 passes through CC030VA2F2 cable to 15 input terminal CN2 of driver Displacement signal is transmitted, driver 15 passes through the output end CN5 of CC36D2E cable connection driver 15 by XS3, to single-chip microcontroller Control unit input terminal XS3 transmits displacement signal, and CN2 connector connects electronic slide unit 12, single-chip microcontroller by CC030VA2F2 cable Control unit 9 accesses circuit a, the circuit b conducting wire from return wire 2；Switch S1 represents target 5 and proximity sensor 4 two in figure The electric pathway whether person's all-metal structure contacts is represented with switch S1 closure in electrical circuit, is connect when the two is non-when the two contact When touching, is disconnected and being represented with switch S1 in electrical circuit.Target 5 and proximity sensor 4 by non-contact to the instantaneous position contacted, The return-to-zero signal of contact in place is generated in electrical circuit.Pass through the connected proximity sensor detection of the XP4 leading foot of XS4 on output end Device passes through the RS232 serial ports of the connected host computer of the XP1 leading foot of XS1 on output end.Driver 15 is controlled by single-chip microcontroller The control of unit 9, and then the sliding block 16 on electronic slide unit 12 is pushed to move along a straight line, sliding block 16 passes through 13 band of transition connecting rod Moving-target mark moves along a straight line.Electronic slide unit 12 its internal ball screw under the electric drive of driver 15 carry out clockwise or Rotation counterclockwise drives sliding block 16 on ball screw far from (moving to right) or close to the motor (in figure of (moving to left) electronic slide unit 12 Left side) direction movement, the positioning accuracy repeatedly of rectilinear direction shift to right or left is ± 0.02mm.

Single chip control unit 9 receives the instruction of host computer by the RS232 serial ports of XS1 connection host computer, feeds back simultaneously Location status information is to host computer.The instruction for the host computer that single chip control unit 9 receives, finally on electronic slide unit 12 at For the realization of positional distance point.The 32nd pin of CN5 of driver 15 is control pin clockwise in figure, and the 36th pin is counterclockwise Pin is controlled, the 23rd pin is two circuit units in left and right pin altogether.When obtaining single chip control unit on 32 pins of CN5 When pulse signal on 9 on XS3, the ball screw in electronic slide unit 12 is rotated clockwise, the sliding block on electronic slide unit 12 16 (move) to the right far from movement；When the pulse signal on the 36th pin of CN5 in acquisition single chip control unit 9 on XS3 When, the ball screw in electronic slide unit 12 is rotated counterclockwise, and the sliding block 16 on electronic slide unit (is transported to the left close to movement It is dynamic).The distance of the two move distance is determined by the umber of pulse obtained on upper 32nd or the 36th pin of CN5 of driver 15, is moved Speed speed is determined by its pulse frequency.Driver 15 and electronic slide unit 12 itself band position feedback closed loop circuit, have position Distance positioning ability.Circuit a, the circuit b conducting wire of 9 connector XS2 link circuit conducting wire 2 of single chip control unit, for receiving Target 5 contacts the return-to-zero signal connected in place with proximity sensor 4.In proximity sensor close to threshold variations point detection system In test, since target 5 and 4 distance change of proximity sensor cause the variation of proximity sensor signal, which is approached Sensor detecting device is periodically detected, and target 5 and 4 distance of proximity sensor can cause to approach sensing when moving to critical point Ga The low and high level of the on-off model of device detection device output changes, which enters list by XS4 connector Piece machine control unit 9, to be detected.

The utility model is not limited to above embodiment, anyone can obtain other under the enlightenment of the utility model Various forms of products are thought however, making any variation in its shape or structure not departing from the above-mentioned technology of the utility model In the case where thinking, according to ordinary skill knowledge and customary means, various replacements and change are made, this reality should all be included in With novel protection scope.

Claims (8)

1. a kind of proximity sensor is close to threshold variations point test macro, comprising: be fixed on high-low temperature test chamber (1) partition Fixing tool and the proximity sensor detection device (11) being fixed on high/low temperature control cabinet (10) partition, fixing tool pass through end To the electronic trapezoidal draw runner (8) of connection, it is characterised in that: electronic trapezoidal draw runner (8) connects electric sliding by transition connecting rod (13) Sliding block (16) on platform (12), electronic slide unit (12) are connected single chip control unit (9) by driver (15), single-chip microcontroller control Unit (9) input terminal connects the proximity sensor detection device (11) being placed in high/low temperature control cabinet (10), and output end passes through back Line conductor connects proximity sensor (4) and target (5) of the clamping on fixing tool, proximity sensor detection device (11) output Another conducting wire on end is connected directly between on target (5), collectively constitutes proximity sensor close to threshold variations point detection system.

2. proximity sensor according to claim 1 is close to threshold variations point test macro, it is characterised in that: single-chip microcontroller control Unit (9) processed controls the sliding block (16) on electronic slide unit (12) by driver (15), the target being connected through transition connecting rod (13) Connecting rod (6) drives target (5) movement, detects and proofreads between proximity sensor (4) and target (5) incude end face and aligns the zero of contact Point distance.

3. proximity sensor according to claim 2 is close to threshold variations point test macro, it is characterised in that: driver (15) sliding block (16) on electronic slide unit (12) is pushed to move along a straight line, sliding block (16) drives target by transition connecting rod (13) Linear motion.

4. proximity sensor according to claim 1 is close to threshold variations point test macro, it is characterised in that: electronic slide unit (12) under the electric drive of driver (15), internal ball screw carries out clockwise or counterclockwise, driving ball screw On sliding block (16) away from or approaching electronic slide unit (12) motor drive direction move.

5. proximity sensor according to claim 1 is close to threshold variations point test macro, it is characterised in that: single-chip microcontroller control Unit (9) processed drives target (5) to move the right side and moves closer to proximity sensor induction end by driver (15), electronic slide unit (12) Face.

6. proximity sensor according to claim 1 is close to threshold variations point test macro, it is characterised in that: electronic slide unit (12) connection driver (15) forms displacement measurement unit, and single chip control unit (9) matches crosslinking with electronic slide unit (12).

7. proximity sensor according to claim 6 is close to threshold variations point test macro, it is characterised in that: electronic slide unit (12) displacement signal is transmitted to driver (15) input terminal CN2 by CC030VA2F2 cable, driver (15) passes through by XS3 The output end CN5 of CC36D2E cable connection driver (15) transmits displacement signal to single chip control unit input terminal XS3, CN2 connector is connect electronic slide unit (12) by CC030VA2F2 cable, and single chip control unit (9) is accessed from return wire (2) Circuit a, circuit b conducting wire.

8. proximity sensor according to claim 1 is close to threshold variations point test macro, it is characterised in that: fixing tool It include: the nonmetallic mounting frame for sensor that proximity sensor (4) is horizontally fixed on to flat base (14) by pilot hole (3), mounting frame for sensor (3) are parallel to, the rectangular platform (7) being fixed on flat base (14), with proximity sensor (4) Opposite coaxial isolation, is assemblied in the electronic trapezoidal draw runner in dovetail groove sliding rail by rectangular platform (7) top dovetail groove sliding rail (8), electronic trapezoidal draw runner (8) axially connection target connecting rod (6), is relatively close to sensor (4) sensitive surface, target (5) is fixed on The rod end of target connecting rod (6).