CN109631955A - Surface mark sensor, detection device and system - Google Patents
Surface mark sensor, detection device and system Download PDFInfo
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- CN109631955A CN109631955A CN201811431615.4A CN201811431615A CN109631955A CN 109631955 A CN109631955 A CN 109631955A CN 201811431615 A CN201811431615 A CN 201811431615A CN 109631955 A CN109631955 A CN 109631955A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
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Abstract
The present invention provides a kind of surface mark sensor, detection device and system, sensor includes: frequency source, search coil component and signal processing circuit；Search coil component includes: transmitting coil, balance coil and receiving coil, and balance coil and receiving coil access the signal processing circuit；Frequency source is used to generate the alternating signal of predeterminated frequency according to external control instruction, and transmitting coil receives the alternating signal and generates alternating magnetic field, and balance coil and receiving coil generate induced electromotive force in the alternating magnetic field and access the signal processing circuit.The present invention solves the influence of temperature drift, and system disclosed by the invention uses digital display circuit, and structure and function is simple, it is easy to accomplish, the detection especially suitable for railway surface mark.
Description
Technical field
The present invention relates to tracks, are concretely a kind of surface mark sensor, detection device and system.
Background technique
Track inspection car is the geometry state irregularity situation for detecting track, to evaluate the spy of track geometry status
Kind vehicle, abbreviation track checking car.It is guarantee driving safety, tool that is steady, comfortable and instructing railway maintenance maintenance.It is examined according to rail
The record of vehicle is promptly studied for a second time courses one has flunked or speed limit measure, and determination should be counted to take it can be found that the undesirable place of rail smooth
The mileage paragraph of maintenance is drawn, maintenance activity plan is worked out.In addition, railway maintenance level can also be evaluated according to the record of track checking car
With trimming operations quality level.
When track checking car detects route, gauge, rail are had recorded to the data waveform of the projects such as, height, level, twist irregularity, is
It according to waveform diagram rapid positioning track disease site and is repaired convenient for line maintenance personnel, in track checking car waveform diagram
Several surface marks also on output track, such as road junction, track switch, bridge.Road junction, track switch on track circuit, bridge, gauge
Pull rod etc. can contain metal parts, surface mark sensor (the Automatic Location being installed on track checking car detection beam
Detector, ALD) these metal parts can be detected, the signal of output can be with mileage, track irregularity simultaneous display
On track detection waveform figure, according to waveform diagram rapid positioning track disease site and repaired convenient for related personnel.
With the development of computer technology, there is the online way trouble context of detection of more advanced technology both at home and abroad at present
The application of research, the technologies such as image procossing, optics not only can detecte switch location, while can monitor switch status, represent
The direction of technology development.Current vortex sensor is widely applied to every profession and trade as a kind of technology of maturation, in the 1990s,
Japan applies current vortex sensor on synthetic detection vehicle, detects to the Shinkansen, can detect some geometry of route
The information such as parameter, surface mark.The ALD that domestic each road bureau's track checking car uses at present is eddy current sensor, is examined as rail
One miscellaneous function of system, is the experience for using for reference U.S. ENSCO company, and sensor is mounted on track checking car in the following, flat with axle
Capable detection beam middle position, apart from rail surface certain altitude, for ground such as road junction, track switch, bridge, guard rails on detection track
Ferromagnetic object, function simply easily realize, but higher to operating environment requirements, needs frequent human intervention sensor zero point
Threshold value.
Summary of the invention
To realize the detection for being suitable for railway surface mark, the embodiment of the invention provides a kind of surface mark sensor,
Sensor includes: frequency source, search coil component and signal processing circuit；Search coil component includes: transmitting coil, balance
Coil and receiving coil, the balance coil and receiving coil access the signal processing circuit；
The frequency source is used to generate the alternating signal of predeterminated frequency, the transmitting coil according to external control instruction
It receives the alternating signal and generates alternating magnetic field, the balance coil and receiving coil generate in the alternating magnetic field and induct
Electromotive force accesses the signal processing circuit.
In the embodiment of the present invention, the transmitting coil, the enameled wire of balance coil and receiving coil is uniformly close to be around in
Organic glass skeleton；The balance coil is identical with receiving coil the number of turns, the axis of the balance coil and receiving coil with
The axis of transmitting coil is vertical.
In the embodiment of the present invention, the signal processing circuit includes: demodulator circuit, filtering and amplifying circuit and differential puts
Big circuit；Wherein,
The induced electromotive force is output to filtering and amplifying circuit by the demodulator circuit and is filtered, and is sent into after filtering
The differential amplifier circuit.
Meanwhile the present invention also provides a kind of surface mark detection devices, it is described for detecting the surface mark on track
Detection device includes: surface mark sensor, digital signal processing device；Wherein,
The surface mark sensor includes: frequency source, search coil component and signal processing circuit；Search coil
Component includes: transmitting coil, balance coil and receiving coil, and the balance coil and receiving coil access the signal processing
Circuit；
The frequency source is used to generate the alternating signal of predeterminated frequency according to the control instruction of digital signal processing device,
The transmitting coil receives the alternating signal and generates alternating magnetic field, and the balance coil and receiving coil are in the alternation
Induced electromotive force is generated in magnetic field and accesses the signal processing circuit, and the signal processing circuit outputs voltage signal to number
Signal processing apparatus.
In the embodiment of the present invention, the digital signal processing device is connected to frequency source by spi bus.
In the embodiment of the present invention, the digital signal processing device includes: A/D conversion module, is used for signal processing
Circuit output voltage signal is converted to digital voltage signal.
Further, the present invention also provides a kind of surface mark detection systems, for detecting the surface mark on track, system
Include: surface mark sensor, digital signal processing device and detection host, the digital signal processing device respectively with
The surface mark sensor is connected with detection host；Wherein,
The surface mark sensor includes: frequency source, search coil component and signal processing circuit；Search coil
Component includes: transmitting coil, balance coil and receiving coil, and the balance coil and receiving coil access the signal processing
Circuit；
The frequency source is used to generate the alternating signal of predeterminated frequency according to the control instruction of digital signal processing device,
The transmitting coil receives the alternating signal and generates alternating magnetic field, and the balance coil and receiving coil are in the alternation
Induced electromotive force is generated in magnetic field and accesses the signal processing circuit, and the signal processing circuit outputs voltage signal to number
Signal processing apparatus.
In the embodiment of the present invention, the digital signal processing device is connected by CAN bus with detection host.
The present invention is applied to the detection of track surface mark, and sensor uses eddy current principle, and balance type structure is fine
Solves the influence of temperature drift, and system disclosed by the invention uses digital display circuit, structure and function is simple, is easy to real
It is existing, the detection especially suitable for railway surface mark.
For above and other objects, features and advantages of the invention can be clearer and more comprehensible, preferred embodiment is cited below particularly,
And cooperate institute's accompanying drawings, it is described in detail below.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural block diagram of surface mark sensor disclosed by the invention；
Fig. 2 is the block diagram of surface mark detection device disclosed by the invention；
Fig. 3 is the block diagram of existing ALD sensor；
Fig. 4 is the system composition block diagram of surface mark sensor disclosed in one embodiment of the invention；
Fig. 5 is the schematic diagram of internal structure of surface mark sensor disclosed in one embodiment of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of surface mark sensors, as shown in Figure 1, for the ground mark provided in the embodiment of the present invention
The structural block diagram of will sensor, comprising: frequency source 101, search coil component 102 and signal processing circuit 103；Search coil
Component 102 includes: transmitting coil 1021, balance coil 1022 and receiving coil 1023, balance coil 1022 and receiving coil
1023 access signal processing circuits 103；
Frequency source 101 is used to generate the alternating signal of predeterminated frequency according to external control instruction, and transmitting coil 1021 receives
Alternating signal generates alternating magnetic field, and balance coil 1022 and receiving coil 1022 generate induced electromotive force access in alternating magnetic field
Signal processing circuit 103.
In the embodiment of the present invention, the enameled wire of transmitting coil 1021, balance coil 1022 and receiving coil 1023 is uniform
It is close to be around in organic glass skeleton；And balance coil 1022 is identical with the enamel-cover number of wire turns of receiving coil 1023, balance coil
1022 and receiving coil 1023 axis it is vertical with the axis of transmitting coil 1021.
Meanwhile invention additionally discloses a kind of surface mark detection devices, for detecting the surface mark on track, such as Fig. 2
Shown, detection device includes: surface mark sensor 10, digital signal processing device 20；Wherein,
Surface mark sensor 10 includes: frequency source 101, search coil component 102 and signal processing circuit 103；It visits
Survey line coil assembly 102 includes: transmitting coil 1021, balance coil 1022 and receiving coil 1023, balance coil 1022 and is connect
Take-up circle 1023 accesses signal processing circuit 103；
Frequency source 101 is used to generate the alternating signal of predeterminated frequency according to external control instruction, and transmitting coil 1021 receives
Alternating signal generates alternating magnetic field, and balance coil 1022 and receiving coil 1022 generate induced electromotive force access in alternating magnetic field
Signal processing circuit 103, signal processing circuit 103 output voltage signal to digital signal processing device 20.
In the embodiment of the present invention, digital signal processing device 20 is connected to frequency source 101 by spi bus.Digital signal
Processing unit includes: A/D conversion module, for signal processing circuit output voltage signal to be converted to digital voltage signal.
As shown in figure 3, being the block diagram of existing ALD sensor, wherein oscillator 201 generates the sine wave letter of frequency f
Number, it is respectively fed to the input terminal of transmitting coil 202 and demodulator 203, receiving coil 204 send the same frequency sinusoidal signal received
Enter another input terminal of demodulator 203, the direct current signal u after the demodulated demodulation of device 2030、u1It is sent into differential amplifier 205
It is exported after processing.
When under sensor without metal object, the two-way sinusoidal signal of receiving coil and oscillator respectively symmetrically, demodulator solution
Recall same direct current signal, i.e. u0=u1, the output voltage of differential amplifier is zero.When there is metal object close to receiving coil,
Receiving coil inductance changes, and the two-way sinusoidal signal of receiving coil and oscillator is asymmetric, and the output of demodulator has electricity
Pressure difference, u0≠u1, therefore differential amplifier has output voltage.Metal object and receiving coil distance are closer, and output voltage is bigger, away from
In the case where certain, the area of metal object is bigger, and output voltage is bigger.
In existing ALD sensor shown in Fig. 3, the resistance of coil is the function of temperature t, i.e. R1=f (t), line
Resistance is enclosed to increase with temperature (external world or itself) and increase, and the increase of resistance makes coil q degenerate, receiving coil is defeated
Voltage u out0Reduce, at this time u0≠u1, therefore sensor output voltage is not 0, output waveform deviates baseline, needs operator's frequency
It is numerous that its zero point threshold voltage is adjusted, so that output waveform is returned to baseline.
Also, existing ALD sensor uses analog circuit, generates alternating magnetic field using RLC resonance circuit, signal is not so good as
Digital electricity is reliable and stable, and sensor output is analog signal, cannot directly access industrial personal computer, needs to increase at special signal
Manage equipment.
Sensor disclosed by the invention remains the appearance of former ALD, has re-started internal circuit design and structure optimization,
On the basis of compatible original ALD, the interface for being suitable for digital rail check system is extended, it can export analog- and digital- two-way letter
Number, it is functionally still detection route surface mark.
Surface mark sensor disclosed by the invention and detection device, compensate the temperature drift of receiving coil, that is, inhibit temperature
The influence that degree variation exports sensor, the system of surface mark sensor improve system using digital processing unit as core
Reliability and stability, and on the basis of compatible original ALD, extension is suitable for the interface of digital rail detection system.
As shown in figure 4, for the system composition block diagram of surface mark sensor disclosed in one embodiment of the invention.The present embodiment
System using DSP digital processing element as core, surface mark sensor is by search coil, signal processing circuit, frequency source etc.
Composition.
Search coil in the present embodiment: it is made of three coils, transmitting coil uses line footpath for d1Enameled wire it is uniformly close
It is wound on organic glass skeleton, for generating alternating electromagnetic field in the case where alternating current drives；Receiving coil and balance coil use
Line footpath is d2Enameled wire uniformly on the close organic glass skeleton for being wound on 2 geometric dimension strict conformances, in the embodiment of the present invention
It is required that 2 coils of receiving coil and balance coil are symmetrical above and below, the number of turns strict conformance, and axis strictly with transmitting coil axis
Vertically, symmetrically.The quality of coil characteristics has significant impact to the resolution ratio of system, sensitivity and stability.Receiving coil peace
The induced electromotive force of weighing apparatus coil accesses signal processing circuit.In the present embodiment, d1Enameled wire line footpath be Ф 0.12mm, the number of turns,
For 150 circles, uniformly it is close around；d2Enameled wire line footpath be Ф 0.14mm, the number of turns be 26.5 circles, uniformly it is close around.The embodiment of the present invention
In, d1And d2All be it is adjustable, can also be the same, the inductance of coiling is key technical index, and inductance is met the requirements,
The present embodiment considers that sensor internal space structure uses different line footpath.
Signal processing circuit: in the present embodiment, signal processing circuit is by demodulator circuit, filtering and amplifying circuit and differential amplification
The composition such as circuit, to symmetrical two-way filtering and amplifying circuit is respectively outputted to after the signal demodulation of search coil, after filtering newly
Semaphore is sent into differential amplifier circuit and is handled, and the A/D module that the voltage signal finally exported is sent to dsp processor carries out mould
Number conversion.
Dsp processor: the frequency and amplitude of frequency source are controlled by spi bus；The signal of signal processing circuit is carried out
Acquire and to data processing, data that treated by CAN bus be sent into detect host.
Frequency source: the digit chip of frequency source receives the instruction of dsp processor, generates the alternating signal that frequency is f and accesses
Transmitting coil, as frequency source.ALD compared to the prior art is realized with RLC resonance circuit, improves waveform generation in this way
Stability.
It detects host: receiving the data of dsp processor by CAN bus, carry out data storage and waveform is shown, the present invention
Host is detected in embodiment can be used the QNX real-time processing computer realization of rail check system.
The characteristics of the present embodiment whole system is to be constituted using dsp processor as core with bus mode connection main devices
Digital display circuit, it is connected in which can be convenient with real-time processing computer, realizes the remote parameter setting and information of sensor
Exchange, system performance is improved compared with the metal detector that traditional analog circuit forms.
The working principle of the field application of the embodiment of the present invention:
Sensor uses balance type structure in the embodiment of the present invention, i.e., a bucking coil is increased in detection circuit,
It ensure that output signal not vulnerable to external interference.
As shown in figure 5, transmitting coil is planar as densely packed coil in the embodiment of the present invention, when transmitting coil access circuit produces
When raw frequency is the alternating current of f, alternating electromagnetic field, the effect of balance coil A, receiving coil B in alternating magnetic field can be generated
Under will generate induced electromotive force.
When not having ferromagnetic object around sensor, transmitting coil generates equal in magnitude, direction at receiving coil both ends
Opposite alternating magnetic field H1.That is HA1=H1, HB1=-H1.Due to A, B two receiving coil bilateral symmetries, the number of turns strict conformances, and
Axis is strictly vertical with transmitting coil axis, symmetrical, by electromagnetic induction principle it is found that equivalent alternating magnetic field generates inducting for equivalent
Electromotive force, therefore, two receiving coils of A, B generate equal in magnitude, contrary output voltage, after the differential amplification of oversampling circuit
It is 0 that voltage, which always exports,.
When have ferromagnetic material from underface close to sensor a certain range in when, ferromagnetic object to sensor axis
Distance be S.Following variation will occur for the alternating electromagnetic field around receiving coil at this time:
1) the alternating electromagnetic field H that transmitting coil generates1；
2) the alternating electromagnetic field H that transmitting coil generates1Vortex, the vortex in ferromagnetic object are generated in ferromagnetic object
Also an alternating electromagnetic field H can be generated2。
H2With H1Frequency it is identical, with the electromagnetic field H around following receiving coil BA1Direction is identical, and connects with above
Receive the electromagnetic field H around loop AB1It is contrary.ALD sensor is closer at a distance from ferromagnetic object surface, H2Numerical value get over
Greatly, it is clear that HA2< HB2。H1And H2The two collective effect determines the size H of receiving coil peripheral electromagnetic field3, i.e. HB3=HB1+
HB2=H1+HB2, HA3=HA1+HA2=-H1+HA2, it is clear that HA3< HB3.Therefore, the induced electromotive force that two receiving coils of A, B generate
Size is no longer identical, and the voltage of output is not also identical, and it is no longer 0 that voltage, which always exports, after the differential amplification of oversampling circuit, will have certain
The voltage output of size.Ferromagnetic material just can be judged whether there is in this way by ALD sensor.
In the embodiment of the present invention, the encapsulation of sensor:
Transmitting coil, balance coil and receiving coil will emit after making and measuring its inductance value in claimed range
Coil, balance coil, receiving coil and circuit board are packed into the plastic tube processed, and the position and angle for adjusting receiving coil make
Obtaining output voltage is zero, is then fixed with glue.The position of transmitting coil in use, balance coil and receiving coil in order to prevent
It changes, fills plastic tube with the extraordinary glue of mobility in the embodiment of the present invention, cover solidification, thorough fixed transmission line
Circle, balance coil, receiving coil and circuit board complete packaging technology.
In the embodiment of the present invention, packaged sensor meet after tested sensitive direction apart from metal inductor 130mm~
When 150mm, sensor output voltage is greater than 100mv, and when around sensor without metal inductor, sensor output should be close to 0mv
It can be used.
In the embodiment of the present invention, sensor is mounted on detection beam parallel with axle below track checking car car body, away from sleeper
Face is no more than 350mm.When track checking car passes through surface mark position, sensor output phase answers voltage signal.Due to metal material
There is larger impact to the magnetic field of coil, therefore its fixed frame has to use nonmetallic materials (such as nylon), and fixed frame week
Metal material object can not be had by enclosing in 300mm, otherwise, will affect the stability and reliability of working sensor.
New terrestrial index transducer, detection device and system disclosed by the invention use digital display circuit, carry out in structure
Optimization, interface is compatible with old model sensor, and has carried out on several track detection vehicles installing applying.Sensor meets
Rail check system is to the detection demand of surface mark, and novel sensor does not need artificial frequent adjusting zero point threshold value, has more
Good reliability and stability.
Novel sensor has developed digital circuit on the sensor integration of existing surface mark position, reliable and stable；And
Using coil balanced structure, compensation temperature drift no longer needs artificial frequently adjusting sensor zero point compared to existing sensor.
Sensor structure is simple, using convenient, meets the market demand, is not only used on track checking car, also available to other a variety of rails
In road dynamic detection product, disease position is detected for auxiliary judgment.
The present invention applies in track field, and sensor uses eddy current principle, and balance type structure solves temperature drift very well
The influence of shifting.Using digital display circuit, structure and function is simple, it is easy to accomplish, the detection especially suitable for railway surface mark.This
The detection signal acquired in inventive embodiments can be applied in track geometry detection system, be also extrapolated to use rail polling,
In the track dynamics detection system such as profile, undulatory wear, contact net.
Surface mark sensor, detection device and system disclosed by the invention compensate the temperature drift of receiving coil, i.e.,
Inhibit the influence of temperature changes on sensor output.The system of surface mark sensor is mentioned using DSP digital processing element as core
The reliability and stability of high system, and on the basis of compatible original ALD, extension is suitable for the interface of digital rail detection system.
Specific embodiment is applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Explanation be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (14)
1. a kind of surface mark sensor, which is characterized in that the sensor includes: frequency source, search coil component and
Signal processing circuit；Search coil component includes: transmitting coil, balance coil and receiving coil, the balance coil and is connect
Take-up circle accesses the signal processing circuit；
The frequency source is used to generate the alternating signal of predeterminated frequency according to external control instruction, and the transmitting coil receives
The alternating signal generates alternating magnetic field, the balance coil and receiving coil generated in the alternating magnetic field induct it is electronic
Gesture accesses the signal processing circuit.
2. surface mark sensor as described in claim 1, which is characterized in that the transmitting coil, balance coil and
The enameled wire of receiving coil is uniformly close to be around in organic glass skeleton；The balance coil is identical with receiving coil the number of turns, described
The axis of balance coil and receiving coil is vertical with the axis of transmitting coil.
3. surface mark sensor as described in claim 1, which is characterized in that the signal processing circuit includes: demodulation
Circuit, filtering and amplifying circuit and differential amplifier circuit；Wherein,
The induced electromotive force is output to filtering and amplifying circuit by the demodulator circuit and is filtered, after filtering described in feeding
Differential amplifier circuit.
4. a kind of surface mark detection device, for detecting the surface mark on track, which is characterized in that the detection device
It include: surface mark sensor, digital signal processing device；Wherein,
The surface mark sensor includes: frequency source, search coil component and signal processing circuit；Search coil component
It include: transmitting coil, balance coil and receiving coil, the balance coil and receiving coil access the signal processing electricity
Road；
The frequency source is used to generate the alternating signal of predeterminated frequency according to the control instruction of digital signal processing device, described
Transmitting coil receive the alternating signal and generate alternating magnetic field, the balance coil and receiving coil are in the alternating magnetic field
Middle generation induced electromotive force accesses the signal processing circuit, and the signal processing circuit outputs voltage signal to digital signal
Processing unit.
5. surface mark detection device as claimed in claim 4, which is characterized in that the transmitting coil, balance coil with
And the enameled wire of receiving coil uniformly close is around in organic glass skeleton；The balance coil is identical with receiving coil the number of turns, institute
It states balance coil and the axis of receiving coil and the axis of transmitting coil is vertical.
6. surface mark detection device as claimed in claim 4, which is characterized in that the signal processing circuit includes: solution
Adjust circuit, filtering and amplifying circuit and differential amplifier circuit；Wherein,
The induced electromotive force is output to filtering and amplifying circuit by the demodulator circuit and is filtered, after filtering described in feeding
Differential amplifier circuit.
7. surface mark detection device as claimed in claim 4, which is characterized in that the digital signal processing device passes through
Spi bus is connected to frequency source.
8. surface mark detection device as claimed in claim 4, which is characterized in that the digital signal processing device packet
It includes: A/D conversion module, for signal processing circuit output voltage signal to be converted to digital voltage signal.
9. a kind of surface mark detection system, for detecting the surface mark on track, which is characterized in that the system packet
Include: surface mark sensor, digital signal processing device and detection host, the digital signal processing device respectively with institute
Surface mark sensor is stated to be connected with detection host；Wherein,
The surface mark sensor includes: frequency source, search coil component and signal processing circuit；Search coil component
It include: transmitting coil, balance coil and receiving coil, the balance coil and receiving coil access the signal processing electricity
Road；
The frequency source is used to generate the alternating signal of predeterminated frequency according to the control instruction of digital signal processing device, described
Transmitting coil receive the alternating signal and generate alternating magnetic field, the balance coil and receiving coil are in the alternating magnetic field
Middle generation induced electromotive force accesses the signal processing circuit, and the signal processing circuit outputs voltage signal to digital signal
Processing unit.
10. surface mark detection system as claimed in claim 9, which is characterized in that the transmitting coil, balance coil with
And the enameled wire of receiving coil uniformly close is around in organic glass skeleton；The balance coil is identical with receiving coil the number of turns, institute
It states balance coil and the axis of receiving coil and the axis of transmitting coil is vertical.
11. surface mark detection system as claimed in claim 9, which is characterized in that the signal processing circuit includes: solution
Adjust circuit, filtering and amplifying circuit and differential amplifier circuit；Wherein,
The induced electromotive force is output to filtering and amplifying circuit by the demodulator circuit and is filtered, after filtering described in feeding
Differential amplifier circuit.
12. surface mark detection system as claimed in claim 9, which is characterized in that the digital signal processing device is logical
It crosses spi bus and is connected to frequency source.
13. surface mark detection system as claimed in claim 9, which is characterized in that the digital signal processing device packet
It includes: A/D conversion module, for signal processing circuit output voltage signal to be converted to digital voltage signal.
14. surface mark detection system as claimed in claim 9, which is characterized in that the digital signal processing device is logical
CAN bus is crossed to be connected with detection host.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201835196U (en) * | 2010-09-28 | 2011-05-18 | 中国铁道科学研究院基础设施检测研究所 | Geometrical detecting system for tracks |
| CN202110295U (en) * | 2011-03-08 | 2012-01-11 | 山东华特磁电科技股份有限公司 | Metal detector |
| WO2012045578A1 (en) * | 2010-10-07 | 2012-04-12 | Mettlert-Toledo Safeline Limited | Method for operating a metal detection system and metal detection system |
| CN102540261A (en) * | 2010-10-07 | 2012-07-04 | 梅特勒-托利多安全线有限公司 | Method for operating of a metal detection system and metal detection system |
| CN102565860A (en) * | 2010-10-07 | 2012-07-11 | 梅特勒-托利多安全线有限公司 | Method for monitoring the operation of a metal detection system and metal detection system |
| CN102870011A (en) * | 2010-05-07 | 2013-01-09 | 罗伯特·博世有限公司 | Detection of a metal or magnetic object |
| CN102955173A (en) * | 2011-08-24 | 2013-03-06 | 梅特勒-托利多安全线有限公司 | Metal detection apparatus |
| CN103353613A (en) * | 2013-07-23 | 2013-10-16 | 沈阳斯达特电子科技有限公司 | Time-sharing multi-frequency metal detection machine |
| CN106483569A (en) * | 2016-12-08 | 2017-03-08 | 华北电力大学（保定） | Balanced differences dynamic formula metal detection sensor and insulation paper detecting apparatus |
-
2018
- 2018-11-27 CN CN201811431615.4A patent/CN109631955A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102870011A (en) * | 2010-05-07 | 2013-01-09 | 罗伯特·博世有限公司 | Detection of a metal or magnetic object |
| CN201835196U (en) * | 2010-09-28 | 2011-05-18 | 中国铁道科学研究院基础设施检测研究所 | Geometrical detecting system for tracks |
| WO2012045578A1 (en) * | 2010-10-07 | 2012-04-12 | Mettlert-Toledo Safeline Limited | Method for operating a metal detection system and metal detection system |
| CN102540261A (en) * | 2010-10-07 | 2012-07-04 | 梅特勒-托利多安全线有限公司 | Method for operating of a metal detection system and metal detection system |
| CN102565860A (en) * | 2010-10-07 | 2012-07-11 | 梅特勒-托利多安全线有限公司 | Method for monitoring the operation of a metal detection system and metal detection system |
| CN202110295U (en) * | 2011-03-08 | 2012-01-11 | 山东华特磁电科技股份有限公司 | Metal detector |
| CN102955173A (en) * | 2011-08-24 | 2013-03-06 | 梅特勒-托利多安全线有限公司 | Metal detection apparatus |
| CN103353613A (en) * | 2013-07-23 | 2013-10-16 | 沈阳斯达特电子科技有限公司 | Time-sharing multi-frequency metal detection machine |
| CN106483569A (en) * | 2016-12-08 | 2017-03-08 | 华北电力大学（保定） | Balanced differences dynamic formula metal detection sensor and insulation paper detecting apparatus |
Non-Patent Citations (3)
| Title |
|---|
| BRIGHTON.M等: "Calculation of optimum spacing for a three coil axially symmetric metal detector", 《ELECTRONICS LETTERS- IEE》 * |
| 吴先球: "基于闭合式圆形线圈系统金属探测仪传感器的研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 苏庆丰等: "金属探测器的平衡式线圈最佳空间位置研究", 《国外电子测量技术》 * |
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