CN207895321U - Target is close to movement angle control device - Google Patents
Target is close to movement angle control device Download PDFInfo
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- CN207895321U CN207895321U CN201820273152.2U CN201820273152U CN207895321U CN 207895321 U CN207895321 U CN 207895321U CN 201820273152 U CN201820273152 U CN 201820273152U CN 207895321 U CN207895321 U CN 207895321U
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Abstract
A kind of target disclosed by the utility model is close to movement angle control device, it is desirable to provide a kind of angle precise control, can be with the device of high-precision control target angle.The utility model is achieved by following technical proposals：The asynchronous all the way of microcontroller, full duplex serial ports are electrically connected absolute value numerical value code-disc；Microcontroller controls the rotation direction of stepper motor, synchronous control target turned position, and moves to the relative position with proximity sensor sensitive surface；Target is rotated with the rotation of stepper motor and around target connecting rod end origin O, and the reciprocating rotary in the target section of setting nearly forms shooting lane movement locus along the camber line section of proximity sensor；Stepper motor drives absolute value numerical value code-disc to rotate synchronously；Absolute value numerical value code-disc acquires the azimuth signal of target in real time, controls the movement angle and relative positional accuracy of target, and provides corresponding section instruction.
Description
Technical field
The utility model is related to a kind of target for being mainly used for realizing proximity sensor and proximity sensor difference approach angles
The movement control technology of degree, especially based on switching signal indicatrix, be mounted on undercarriage on proximity sensor and
The control technology of relative motion mode and the stroke setting of its target.
Background technology
Proximity sensor is the important component of Aircraft landing gear system and door-down switch monitoring system, with aircraft
It can require to be continuously improved, proximity sensor is proposed more sternly in safety, reliability, economy, environmental suitability etc.
The requirement of lattice.In A320 series aircraft undercarriage control lock systems, it is mounted on two groups each 16 of undercarriage different location totally 32
A proximity sensor.In folding and unfolding lock system, respectively there are one proximity sensor, this retractable lock sensings for each retractable lock the right and left
Device system is made of three parts：Proximity sensor, sensor target block and LGCIU 1＆2 computer-internal signal processing logics
Card.The logic card of LGCIU computer-internals transmits periodically pulsing or sine wave excitation signal to the sensor internal line of induction
Circle, coil generates induced field, and when lock tongue is impacted and lifts upwards, internal rocking-arm driving mechanism drives target block quickly to move afterwards
Close to sensor.At this point, sensor internal coil impedance value increase, system show Target near signals, when target block from
When opening, impedance value reduces, and system shows Target far signals.These detection approach signals are passed to DMC by LGCIU computers
The location information whether locked after the undercarriage control representated by it simultaneously shown on aircraft cockpit ECAM for computer.This works as
In, whether the inductive signal between sensor and target block has whether shielding and gap normally all play being properly received for signal
Highly important effect.Proximity sensor is usually made of iron core and coil, since it turns the variation of straight line or angular displacement
It is changed to the sensor of winding inductance quantity variation, so also known as inductive displacement transducer.Inductive proximity sensor, which is one kind, to be had
The position instruction and alarm equipment of output switch parameter, are mainly made of high-frequency generator and amplification treatment circuit.After connecing electricity, sensing
The oscillation inductive head of device generates electromagnetic field, when target made of metal to inductive head it is close within the scope of electromagnetic field effect when,
Vortex is generated inside target, this vortex reacts on sensor, causes the variation of internal circuit parameter, thus identify target
Mark.It is mainly one group of coil being wound on magnetizer inside inductive proximity sensor, in low-frequency ac exciting signal source
Under the action of, target and proximity sensor induction end identity distance from variation will cause sensor internal changes of magnetic field, and then cause
Output characterization parameter-inductance of sensor changes, and the variation of inductance represents target and becomes at a distance from proximity sensor
Change.The inductance value of inductive proximity sensor output calculates target and connects after position detection and the processing of folding and unfolding control unit
The distance of nearly sensor sensing end face and the far and near state for judging to need to control according to preset value.Target is the mesh of proximity sensor
Target block, target size and coincidence face at a distance from proximity sensor determine the inductance value size of proximity sensor.For connecing
For nearly sensor use, target and final fixed close and separate two states in proximity sensor position.Target and sensing
The distance of device inductive head can be close to or far away from, to complete the measurement to position quantity, and converts thereof into switching signal feedback
To cockpit, location aware and control of the unit to undercarriage control are realized.Standard measured object (the calibration inspection of inductance type transducer
Ranging from target) running orbit it is unstable when, measured object may offset out sensor detection range, when mounting distance slightly by
When close, measured object is likely to occur shock again with sensor sensing face, and sensor is caused to be damaged.By Analysis of Reliability Data,
In A320 series aircraft undercarriage control lock system sensor faults, 40% between sensor and target block magnetic impurity mistake
Conduct failures caused by more, 30% is sensor electric fault, and 10% is sensor performance wear-out failure, 10% for sensor with
Failure caused by gap is abnormal between target block, 10% is failure caused by the fracture of the support member of sensor or target block.
Target and proximity sensor are relatively close to there are many motion modes, and wherein target is cut along the camber line of proximity sensor
Face is close to being wherein important one kind, such as Fig. 1.Research and application target along the camber line section of proximity sensor close to mode, especially
It is target A and center of rotation O lines OA and the corner dimension of X-axis line and the relationship of proximity sensor inductance value are one important
Content, it is therefore desirable to realize the angle position motion control of target and proximity sensor sensitive surface.The utility model is realized
The purpose.
Utility model content
The utility model aim is, provides a kind of given realization simplicity, has angle precise control, precision high, high-precision
The target of degree control target angle is close to movement angle control device.
The utility model is reached by following measures, a kind of target close to movement angle control device, including：Stepping electricity
Coaxially the be connected shaft of absolute value numerical value code-disc and target connecting rod of machine is controlled by control line through pull-up resistor to power supply microcontroller
System enables driver and motor step actuator, it is characterised in that：The asynchronous all the way of microcontroller, the electrical connection of full duplex serial ports are absolute
It is worth numerical value code-disc；Microcontroller controls the rotation direction of stepper motor, synchronous control target turned position, and moves to and approach
The relative position in sensor sensing face；Target is rotated with the rotation of stepper motor and around target connecting rod end origin O, is being set
Target section in reciprocating rotary, nearly form shooting lane movement locus along the camber line section of proximity sensor；Stepper motor drives
Absolute value numerical value code-disc rotates synchronously；Absolute value numerical value code-disc acquires the azimuth signal of target in real time, controls the movement of target
Angle and relative positional accuracy, and provide corresponding section instruction.
The utility model has the advantages that compared with the prior art.
It is given to realize simplicity.The utility model is using microcontroller by corresponding control line through pull-up resistor to power supply, control
System enables driver and motor step actuator, and circuit devcie is few, and circuit is realized simply, is easily realized, at low cost.Stepper motor is same
The connected individual pen absolute value numerical value code-disc of axis, the asynchronous all the way of microcontroller, full duplex serial ports are electrically connected individual pen absolute value numerical value code-disc,
To the positioning and fixation of proximity sensor 1 in realization, the positioning and installation of electrical axis, the machine of 4 structure of target connecting rod and entirety
Frame, parts are few, simple in structure, clear in structure.
Adjustment is simply, conveniently.The utility model is former around target connecting rod end with the rotation of stepper motor using target
Point O rotations nearly form movement locus along the camber line section of proximity sensor, and adjustment is simply, conveniently.
Angle precise control, precision are high.The utility model receives the position angle control of host computer using microcontroller
Instruction, control stepper motor rotate clockwise or counterclockwise, by step motor control target turned position, and move to
The relative position of proximity sensor sensitive surface, chip microcontroller is flexible, and reaction is fast, and control program is flexibly, effectively.Stepper motor band
Dynamic individual pen absolute value numerical value code-disc synchronization, same to angle, equidirectional rotation, high-precision control target angle, performance are stablized, and angle is fixed
Position is reliable.
Angle control precision is high.Microcontroller calculates target purpose angle and works as on 360 ° of circumference according to the nearest principle that reaches
The differential seat angle of preceding angle, determine whether are new angle and purpose angle≤0.1125 °, otherwise change rotation direction, commutation hair one
Pulse, then whether look into new angle and purpose angle≤0.1125, precision is high, can reach≤0.1125 ° to the control of target angle.
Strong antijamming capability.The utility model acquires the azimuth letter of target using individual pen absolute value numerical value code-disc in real time
Number, control the movement angle and relative positional accuracy of target, by RS485 interfaces, with interrogation reply system will it is coaxial on stepping electricity
The azimuth signal of machine feeds back to microcontroller, strong antijamming capability.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model proximity sensor target motion angle control.
Fig. 2 is the control flow for realizing the control of proximity sensor target motion angle.
Fig. 3 is the installation elevational schematic view of proximity sensor.
Fig. 4 is Fig. 3 targets along the camber line section of proximity sensor close to schematic diagram.
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.
In figure：1 proximity sensor, 2 proximity sensor sensitive surfaces, 3 targets, 4 target connecting rods, 5 shafts, 6 stepper motors, 7
Absolute value numerical value code-disc.
Specific implementation mode
- Fig. 4 refering to fig. 1.In the embodiment described below, a kind of target is close to movement angle control device, including：Step
Stepper motor coaxially be connected absolute value numerical value code-disc and target connecting rod shaft, by control line through pull-up resistor to power supply monolithic
Machine controls and enables driver and motor step actuator, and the asynchronous all the way of microcontroller, full duplex serial ports are electrically connected absolute value numerical value
Code-disc；Microcontroller controls the rotation direction of stepper motor, 3 turned position of synchronous control target, and moves to and close sensing
The relative position of device sensitive surface 2；Target 3 is being set with the rotation of stepper motor and around 3 connecting rod end origin O rotations of target
Target section in reciprocating rotary, nearly form shooting lane movement locus along the camber line section of proximity sensor 1；Stepper motor drives
Absolute value numerical value code-disc rotates synchronously；Absolute value numerical value code-disc acquires the azimuth signal of target 3 in real time, controls the fortune of target 3
Dynamic angle and relative positional accuracy, and provide corresponding section instruction.
According to the utility model, controller uses microcontroller, and such as the microcontroller D1 of model C8051F340, microcontroller is logical
Corresponding control line is crossed through pull-up resistor to+5V power supplys, controls and enables driver and motor step actuator.Specifically, monolithic
Machine, to+5V power supplys, and passes through above-mentioned control by P0.6, P0.7, P1.0 control line parallel connection pull-up resistor R1, R2, R3 of I/O port
Line processed connects motor step actuator N1, motor step actuator N1 connection stepper motors N2.Motor step actuator N1 can be with
Using the step actuator of model HST-8325B.Microcontroller is answered by the control pair of P0.6, P0.7, P1.0 of I/O port
Connect PUL pulse control signals interface, DIR interfaces and the enable signal end EN of motor step actuator N1.Wherein, microcontroller is sent out
What is gone out corresponds to the umber of pulse of stepper motor movement angle, is sent into motor step actuator N1 by PUL Wiring ports, sends out
Pulse control signal by motor step actuator PUL generate control beat A+, A-, B+, B-, correspond to stepper motor respectively
Control beat A+, A-, B+, B- of N2 is carried out at the same time level amplification.DIR interfaces be microcontroller send out drive motor operation side
To direction signal interface, microcontroller passes through PUL by the direction signal that DIR interfaces are sent out to stepper motor N2 prior to microcontroller
The pulse signal that interface is sent out to stepper motor N2 is controlled the sequential of stepper motor N2 by pulse signal, is produced by microcontroller
Raw high/low level signal control stepper motor N2 reliably commutates, and stepper motor N2 is made to rotate clockwise or counterclockwise.DIR- high
4~5V when level, 0~0.5V when low level.EN is that the driver that microcontroller is sent out enables useful signal end, inputs enable signal
For enabling or forbidding.When the EN- of motor step actuator N1 connects low level or internal optocoupler conducting, motor step actuator N1
Stepper motor N2 motors are made to be in free state in the electric current for cutting off each phase of motor, step-by-step impulse is not responded at this time, when being not required to
When with this function, enable signal end EN is hanging.The rotational angle of stepper motor determines by stepper motor N2 rotational pulse numbers, stepping
The velocity of rotation of motor N2 is determined by the frequency of rotational pulse.Monolithic processor controlled stepper motor N2 turns clockwise or counterclockwise
Dynamic, monolithic processor controlled stepper motor N2 axis are located at the O points of Fig. 3, the target connecting rod 4 of the rigid connection rotation of target 3, stepping electricity
Machine N2 axis is rigidly attached to 4 tail end O points of target connecting rod, and target 3 is rotated with the rotation of stepper motor N2 and around O point axis, target
Mark 3 is rotated using 4 length of target connecting rod as the radius of gyration, with the rotation of stepper motor N2 around O point axis, and target 3 is along close
1 induction end A of sensor forms movement locus to the camber line section of 4 tail end O vertical planes of target connecting rod.3 turned position of target by
The rotation of stepper motor N2 determines that target 3 moves to the relative position with 1 sensitive surface 2 of proximity sensor by monolithic processor controlled
Stepper motor N2 is determined.The movement locus relative position and control accuracy of target 3 are absolute by the individual pen coaxial with stepper motor N2
It is worth numerical value code-disc to determine.Stepper motor N2 be 1.8 ° of patterns, i.e., without motor step actuator N1 when 1 pulse rotate 1.8 °, realize
360 ° of rotations need 360 °/1.8 °=200 pulses；Driver is set as 64 subdivisions, it is thin to obtain 200 pulse/360 ° × 64
=12800 pulse/360 °, the i.e. ends PUL are divided to obtain 12800 pulses, stepper motor rotates 360 °, every 1 pulse step electricity
Machine N2 rotates 360 °/12800 pulse ≈, 0.028 °/1 pulse, and here it is theoretically 1 pulses can obtain 0.028 ° of ≈
Rotation resolution angle.If motor step actuator N1 is 128 subdivisions, theoretically 1 pulse can obtain 0.014 ° of ≈'s
Rotate resolution angle.Close along the camber line section of proximity sensor 1 for target 3,1 target motion angle of proximity sensor is
Angle theta, will setting angle theta from zero degree, incremental step is 1 ° of angle, i.e., 0 °, 1 °, 2 °, 3 °, until
Until the perspective plane of target and proximity sensor sensitive surface 2 is detached from, 0 ° of acquisition, 1 °, 2 °, 3 °, correspond to respectively
Proximity sensor 1 inductance value.
The another way of microcontroller is asynchronous, full duplex serial ports UART0, UART1 export RS-485 signals, passes through P0.4, P0.5
Port and sense control terminal P1.1 export RS-485 signals by low-power consumption transceiver D2, and low-power consumption transceiver D2 passes through
RS-485 signals are sent into host computer by output end parallel resistance R4 connection host computers.Microcontroller low pass crosses power consumption receipts
The position angle control instruction that device D2 receives host computer is sent out, while by low-power consumption transceiver D2, will be walked with interrogation reply system
The position angle signal of stepper motor feeds back to host computer.The subtype number of MAX485 may be used in low-power consumption transceiver D2, D3
It is logical that half-duplex may be implemented for the low-power consumption transceiver that RS-485 is communicated with RS-422 in MAX485ESA low-power consumption transceivers
Letter.
Sense control terminal P3.3, the port P3.4 and P3.5 of microcontroller are correspondingly connected with low-power consumption transceiver D3, low work(
Consumption transceiver D3 passes through output end parallel resistance R5 connection absolute value numerical value code-disc N3, the i.e. output port of low-power consumption transceiver D3
The input terminal RS485B, resistance R5 of the output port B connection absolute value numerical value code-discs N3 of the RS485A of A connection input terminals N3, D3
It is connected in parallel on low-power consumption transceiver D3 and absolute value numerical value code-disc N3 lines.The individual pen absolute value numerical value code-disc N3 and stepping simultaneously
Motor N2 is connected in the axis coaxle of both structure upper edges, and absolute value numerical value code-disc N3 interfaces export RS485 signals.Absolute value number
The individual pen absolute value numerical value code-disc of model GMS412RE10PB may be used in value code-disc N3.The individual pen absolute value numerical value code-disc 12
4096 linear resolutions of position are 212=4096, per 360 °/4096 line ≈ of line angle degree, 0.088 °/1 lines, there is coding and in real time acquisition side
The ability of parallactic angle signal.The rotation of stepper motor N2 drives the synchronization of individual pen absolute value numerical value code-disc, same to angle, equidirectional rotation,
The sense ports control terminal P3.3, P3.4 and P3.5 of microcontroller export RS-485 through MAX485ESA low-power consumption transceivers D3
Signal inputs individual pen absolute value numerical value code-disc N3 by parallel resistance R5, compares stepper motor N2 rotational pulses, realizes resolution ratio
Less than 1 °, and by its RS485 interface, by interrogation reply system will it is coaxial on the azimuth signal of stepper motor N2 feed back to list
Piece machine.Compared stepper motor N2 rotation 0.028 °/1 pulse of ≈ and 0.088 °/1 lines of individual pen absolute value numerical value code-disc ≈,
0.028°<0.088 °, the theoretical rotation precision that can reach is≤0.088 °, realizes that resolution ratio is less than 1 °.
Refering to Fig. 2.Booting, when target 3 be in the arbitrary θ angles that last time terminates, microcontroller self-test, target 3 is clockwise turn
Dynamic 4 90 °, then reset to θ=0 ° counterclockwise, check circuit, mechanical structure connection working order, microcontroller waits for upper
Computer, which sends out new command or host computer and send out new purpose angle command, have been executed and has waited for afterwards if being non-new purpose angle command；
If new purpose angle command, microcontroller calculate new purpose angle, purpose is calculated according to the nearest principle that reaches on 360 ° of circumference
The differential seat angle of angle and current angular, computational theory arrival need to send umber of pulse N；Microcontroller enables motor step actuator N1
And the direction of motion, send N-10 pulse.Microcontroller determines whether are new angle and purpose angle≤0.1125 ° (current angular with
The angle position tolerance value of purpose angle controls in 0.1125 °).If not, rotation direction is constant, then microcontroller sends out a pulse
(stepper motor walks a minimum angles), whether microcontroller look into new angle and purpose angle again≤and 0.1125 °, if not, rotation direction
It is constant, after one pulse of supervention；, purpose angle is reached if 0.1125 ° of new angle and purpose angle=.
Microcontroller determines whether are new angle and purpose angle≤0.1125 °, if not, rotation direction changes, then commutate hair one
A pulse；New angle and purpose angle are looked into again whether≤0.1125 °, it then exits in this way；If no and rotation direction changes, then commutate
Send out a pulse；So commutation sends out pulse rotation and reaches 3 times, then exits at the end of the 3rd time.
Refering to Fig. 3, Fig. 4.The target 3 of the induction end of 3 face proximity sensor 1 of target, the rigid connection rotation of target 3 connects
Bar, the radius of gyration are 4 length of target connecting rod, are rigidly attached on 4 tail end O points of target connecting rod, step motor shaft rigid connection target
Connecting rod 4O points are marked, O points are set as origin, and O points and the axis line of proximity sensor 1 are OX, are equivalent to coordinate OX's
Forward direction, it is zero degree that target 3, which is moved to around O points with the angle theta of OX forward directions, at this time；Target is determined by monolithic processor controlled stepper motor
Mark 3 moves to the relative position with 1 sensitive surface 2 of proximity sensor, and turned position is determined by the rotation of stepper motor.Microcontroller control
The stepper motor axis of system is located at the O points of Fig. 3, and monolithic processor controlled stepper motor axis is located at the target for being set as coordinate origin
4 tail end O points of connecting rod.It rotating clockwise, angle theta increases to 360 ° by zero degree, and control stepper motor rotates clockwise or counterclockwise,
Target 3 is rotated with the rotation of stepper motor and around O point axis, and target 3 is close along the camber line section of proximity sensor 1, is formed
The movement locus A-A ' of target 3, the movement locus A-A ' of target 3 are by the individual pen absolute value numerical code that is coaxially connected with stepper motor
Disk determines relative position and control accuracy.
Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with the power
Subject to the protection domain that profit requires.
Claims (9)
1. a kind of target is close to movement angle control device, including：Stepper motor is coaxially connected absolute value numerical value code-disc and target
The shaft of connecting rod controls by control line through pull-up resistor to power supply microcontroller and enables driver and motor step actuator,
It is characterized in that：The asynchronous all the way of microcontroller, full duplex serial ports are electrically connected absolute value numerical value code-disc；Microcontroller controls stepper motor
Rotation direction, synchronous control target（3）Turned position, and move to and proximity sensor sensitive surface（2）Relative position；Target
Mark（3）With the rotation of stepper motor around target（3）The O rotations of connecting rod end origin, the reciprocating rotary in the target section of setting
Turn, shooting lane movement locus is nearly formed along the camber line section of proximity sensor 1；Stepper motor drives absolute value numerical value code-disc to synchronize
Rotation；Absolute value numerical value code-disc acquires target in real time（3）Azimuth signal, control target（3）Movement angle and opposite position
Precision is set, and provides corresponding section instruction.
2. target as described in claim 1 is close to movement angle control device, it is characterised in that：Microcontroller passes through I/O port
P0.6, P0.7, P1.0 control line parallel connection pull-up resistor R1, R2, R3 connect motor step to+5V power supplys, and by above-mentioned control line
Into driver N1, motor step actuator N1 connection stepper motors N2；Microcontroller passes through P0.6, P0.7, P1.0 of I/O port
Control line is correspondingly connected with PUL pulse control signals interface, DIR interfaces and the ends EN of motor step actuator N1.
3. target as described in claim 1 is close to movement angle control device, it is characterised in that：Microcontroller is sent out corresponding
Motor step actuator N1, the Pulse Width Control sent out are sent by PUL Wiring ports in the umber of pulse of stepper motor movement angle
Signal generates control beat A+, A-, B+, B- by the PUL of motor step actuator, corresponds to the control section of stepper motor N2 respectively
A+, A-, B+, B- are clapped, is carried out at the same time level amplification, and the direction signal sent out to stepper motor N2 by DIR interfaces is prior to list
The pulse signal that piece machine is sent out by PUL interfaces to stepper motor N2 is believed by the high/low level that microcontroller DIR interfaces generate
The commutation of number control stepper motor N2.
4. target as described in claim 1 is close to movement angle control device, it is characterised in that：Target（3）Rigid connection turns
Dynamic target connecting rod（4）, stepper motor N2 axis is rigidly attached to target connecting rod（4）Tail end O points；Monolithic processor controlled stepper motor
N2 is rotated clockwise or counterclockwise, target（3）It is rotated around O point axis with the rotation of stepper motor N2, the radius of gyration is target
Mark connecting rod（4）Length.
5. target as described in claim 1 is close to movement angle control device, it is characterised in that：Target（3）Rigid connection turns
Dynamic target connecting rod（4）, stepper motor N2 axis is rigidly attached to 4 tail end O points of target connecting rod, target（3）With target connecting rod（4）It is long
Degree is the radius of gyration, is rotated around O point axis with the rotation of stepper motor N2, target（3）Along proximity sensor（1）Induction end
A is to target connecting rod（4）The camber line section of tail end O vertical planes forms movement locus.
6. target as described in claim 1 is close to movement angle control device, it is characterised in that：Microcontroller by P0.4,
The ports P0.5 and sense control terminal P1.1 export RS-485 signals, low-power consumption transceiver D2 by low-power consumption transceiver D2
By output end parallel resistance R4 connection host computers, RS-485 signals are sent into host computer.
7. target as described in claim 1 is close to movement angle control device, it is characterised in that：The sense control of microcontroller
End P3.3 processed, port P3.4 and P3.5 are correspondingly connected with low-power consumption transceiver D3, low-power consumption transceiver D3 and pass through output end electricity in parallel
Hinder R5 connection absolute value numerical value code-discs N3.
8. target as claimed in claim 7 is close to movement angle control device, it is characterised in that：Low-power consumption transceiver D3's is defeated
The input terminal RS485B of the output port B connection absolute value numerical value code-discs N3 of the RS485A of exit port A connection input terminals N3, D3,
Resistance R5 is connected in parallel on low-power consumption transceiver D3 and absolute value numerical value code-disc N3 lines.
9. target as described in claim 1 is close to movement angle control device, it is characterised in that：The sense control of microcontroller
The ports end P3.3, P3.4 and P3.5 processed export RS-485 signals through MAX485ESA low-power consumption transceivers D3, pass through parallel resistance R5
Input individual pen absolute value numerical value code-disc N3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820273152.2U CN207895321U (en) | 2018-02-27 | 2018-02-27 | Target is close to movement angle control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820273152.2U CN207895321U (en) | 2018-02-27 | 2018-02-27 | Target is close to movement angle control device |
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| CN207895321U true CN207895321U (en) | 2018-09-21 |
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| CN201820273152.2U Active CN207895321U (en) | 2018-02-27 | 2018-02-27 | Target is close to movement angle control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049019A (en) * | 2019-12-26 | 2021-06-29 | 中国航空工业集团公司西安飞机设计研究所 | Circumferential relative motion test bed for magnetic induction type proximity sensor |
-
2018
- 2018-02-27 CN CN201820273152.2U patent/CN207895321U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049019A (en) * | 2019-12-26 | 2021-06-29 | 中国航空工业集团公司西安飞机设计研究所 | Circumferential relative motion test bed for magnetic induction type proximity sensor |
| CN113049019B (en) * | 2019-12-26 | 2022-09-20 | 中国航空工业集团公司西安飞机设计研究所 | Circumferential relative motion test bed for magnetic induction type proximity sensor |
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