CN105352425B - A kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors - Google Patents
A kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors Download PDFInfo
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- CN105352425B CN105352425B CN201510740782.7A CN201510740782A CN105352425B CN 105352425 B CN105352425 B CN 105352425B CN 201510740782 A CN201510740782 A CN 201510740782A CN 105352425 B CN105352425 B CN 105352425B
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Abstract
A kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors, it include the controllable HF switch being connected with high-frequency signal source on car body, the probe coil being connected with controllable HF switch, the signal deteching circuit being connect with probe coil, the self-diagnosis unit switches being connected with signal deteching circuit；Two detection coil input terminals of sensor are connected by two controllable HF switches with two high-frequency signal sources respectively；The output end of two detection coils is connected with mutually independent signal deteching circuit respectively；Controllable HF switch and signal deteching circuit are also connected with sequence controller (T) simultaneously；Two signal deteching circuits export two independent gap measurement values, and signal deteching circuit output is also connected with the input terminal of self-diagnosis unit switches (D), self-diagnosis unit switches output transducer condition diagnosing signal.Two detection coils are controlled by sequence controller and two signal deteching circuit timesharing detect two air gap signals, export mutually glitch-free two-way independence air gap value.
Description
Technical field
The present invention relates to a kind of air gap sensors with self-diagnostic function, especially a kind of magnetic floating train suspending air gap is non-
Touch sensor.
Background technology
Magnetic-levitation train adjusts the electric current in levitating electromagnet by suspension control system and keeps train stable suspersion, suspension gas
Gap sensor may be implemented non-contactly to detect the suspension air gap between train electromagnet and track in real time, while give suspension control
Device processed carries out closed-loop control.Therefore the precision and reliability of air gap sensors directly affect the performance of suspension control system, any
When reason leads to air gap sensors output abnormality, the dynamic property of train suspension control system will be all influenced, multiplying for train is reduced
Comfort, or even aggravation train rail coupled vibration are sat, causes control system to collapse, jeopardizes train operating safety.
Existing magnetic floating train suspending measurement of air gap mostly uses non-contact displacement sensor (air gap sensors), frequently with single spy
Head or dual probe two ways.Include only a detection coil in the probe of single probe air gap sensors, only output detects all the way
As a result, sensor itself is without diagnostic function.Self-diagnostic function is generally realized in another dual probe air gap sensors, frequently with
Twin coil detection method, containing there are one detection coil in each probe, for the magnetic coupling for avoiding between two probe coils, generally
Two probe coils are arranged on position apart from each other, and two probe coils generally use the signal source of different frequency.
The main deficiency of present technology is exactly that only there are one testing result, sensors itself when unicoil detects in single probe
Without diagnostic function, suspension controller can not judge whether sensor detection results are correct, will when sensor itself breaks down
Directly result in suspension control system disabler；And the interference that magnetic coupling is brought between two coils of reduction when twin coil detection,
It must be maintained a certain distance between two coils so that sensor probe becomes large-sized inconvenient installation or even limited by space can not
Installation, and the magnetic coupling between two coils cannot completely eliminate, and the testing result of two detection coils is by working condition each other
It influences.Additionally while two coil electrical parameters are identical, but to reduce magnetic interference between two coils, the frequency of signal source cannot phase
Together, cause the parameter of detection circuit different, the complexity of sensor is made to increase.
Invention content
The object of the present invention is to provide a kind of single probe twin coil self diagnosis magnetic-levitation train air gap sensors, and the sensor is only
There are one detection probes, and can export the independent suspension air gap value of two-way, while sensor has self-diagnostic function can basis
The whether normal output alarm signal of itself working condition.
The present invention is to realize that its invention mesh, used technical solution are：
A kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors, including with high-frequency signal source phase on car body
Controllable HF switch even, the probe coil being connected with controllable HF switch, the signal deteching circuit being connect with probe coil, with
The connected self-diagnosis unit switches of signal deteching circuit；It is characterized in that, sensor is made of single probe, there are two detections in probe
Coil (L1 and L2)；The size of two detection coils (L1 and L2) and around to identical, and be spatially completely superposed；Two detection lines
The input terminal of circle (L1 and L2) passes through two controllable HF switches (K1 and K2) and two high-frequency signal sources (S1 and S2) phase respectively
Connection；The output end of two detection coils (L1 and L2) is connected with mutually independent signal deteching circuit (PS1 and PS2) respectively；It can
Control HF switch and signal deteching circuit are also connected with sequence controller (T) simultaneously；Two signal deteching circuits (PS1 and PS2)
Two independent gap measurement values are exported, signal deteching circuit output is also connected with the input terminal of self-diagnosis unit switches (D), self diagnosis
Unit output transducer condition diagnosing signal.
Each high-frequency signal source is connected by corresponding controllable HF switch with corresponding detection coil, two high-frequency signals
Independently of each other, frequency can be the same or different in source (S1 and S2).Two detection coil sizes are identical, around to identical, and two
A coil space overlapping, has identical electrical parameter.Two controllable switches (K1 and K2) at the same by sequence controller (T) control
System, only there are one switches to be closed in any time period, i.e., only there are one detection coil is in running order, another detection coil
In off state.Two signal deteching circuits (PS1 and PS2) at the same by sequence controller (T) control, only in respective switch
Signal deteching circuit is just detected the signal of corresponding detection coil when closure, two detection coils and two signal detection electricity
Road timesharing detects two independent gap widths.Any one detection coil testing result is not by another coil working feelings in single probe
Condition influences, independent mutually between the output of two signal deteching circuits (PS1 and PS2).Two signal deteching circuits (PS1 and
PS2 output) is connected with the input terminal of self-diagnosis unit switches (D), and whether self-diagnosis unit switches (D) output characterization working sensor state
Normal autodiagnosis break signal.
In this way, the working condition of two detection coils is controlled by two controllable HF switches, pass through sequence controller
The logic level sent out can make two coil time-sharing works, when sequence controller (T) sends out effective logic level, make controllably to open
It closes K1 and is closed the t times, and when K2 is disconnected within the time period, detection coil L1 is encouraged by high-frequency signal source S1, in normal
Working condition, signal deteching circuit are also controlled by effective logic level of sequence controller and are worked normally, to which this road is believed
Number output current detection value.And at this time since switch K2 is not closed, detection coil L2 open circuits, actuating coil L1 can not opened
Induced current is generated in the L2 coils on road, therefore L2 coils do not interfere with the spatial distribution in L1 coil workings magnetic field, while L2 lines
Circle will not generate magnetic interference when open circuit does not work to the external space.Channel 2 exported the detected value in a upper period at this time.Together
Reason, when K2 is closed and K1 is disconnected, the working condition of two coils is similar.Therefore two detection coils and two signal detections
Circuit timesharing detects two air gap signals, exports mutually glitch-free two-way independence air gap value.
Since the working frequency of eddy current sensor can be arranged in 2MHz or more, and the working frequency of suspension controller does not surpass
Cross 20KHz, it can be seen that the working frequency of driving source is 100 times or more of final required effective clearance signal, therefore appropriate
The turn-on cycle of HF switch is set, you can the Signal Regulation requirement of suspension controller can be met by making two-way testing result.
Compared with prior art, the beneficial effects of the invention are as follows：
One, by two detection coils, spatially arranged superposed is independently arranged in two in single probe compared to two coils
The probe size that sensor is greatly reduced in a probe facilitates and installs and can reduce cost；
Two, there are two independent detection coil and two signal deteching circuits in sensor, are detected and are controlled by timesharing, and two
Without magnetic coupling between a independent gap measurement coil, sensor can export two independent gap measurement values；
Three, by self-diagnosis unit switches, sensor can integrate sensor itself according to two-way air gap testing result
Evaluation, when two independent detected values differ greatly Mr. Yu's given threshold, the exportable self diagnosis alarm signal of self-diagnosis unit switches is hanged
Floating controller adjusts safer control strategy according to sensor alarm signal while reporting onboard diagnostics network into line sensor
Fault diagnosis report.
Present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
Description of the drawings
Fig. 1 is the arrangement of two detection coils of the embodiment of the present invention and its schematic diagram of electric principle.
Fig. 2 is the electrical principle structural schematic diagram of the embodiment of the present invention.
Fig. 3 is the control logic schematic diagram of the sequence controller output of the embodiment of the present invention.
Specific implementation mode
Fig. 1 and Fig. 2 shows a kind of specific implementation mode of the invention is：Include being connected with high-frequency signal source on car body
Controllable HF switch, the probe coil being connected with controllable HF switch, the signal deteching circuit being connect with probe coil, with signal
The connected self-diagnosis unit switches of detection circuit, sensor are made of single probe, and there are two detection coils (L1 and L2) in probe；Two
The size of a detection coil (L1 and L2) and around to identical, and be spatially completely superposed；Two detection coils (L1 and L2) it is defeated
Enter end to be connected with two high-frequency signal sources (S1 and S2) by two controllable HF switches (K1 and K2) respectively；Two detection coils
The output end of (L1 and L2) is connected with mutually independent signal deteching circuit (PS1 and PS2) respectively；Controllable HF switch and signal
Detection circuit is also connected with sequence controller (T) simultaneously；Two signal deteching circuits (PS1 and PS2) export two independent gas
Gap detected value, signal deteching circuit output are also connected with the input terminal of self-diagnosis unit switches (D), self-diagnosis unit switches output transducer shape
State diagnostic signal.
Fig. 3 shows that sequence controller of the invention controls two controllable HF switches (K1 and K2) simultaneously, and two switches are handed over
For closure, phase differs 180 degree, a switch is only closed in the same period, i.e., only there are one detection lines in the same period
It encloses in running order, control signal that sequence controller is sent out while giving corresponding detecting signal unit, only work as coil
Corresponding detection circuit just carries out signal extraction detection, thus two coils and two signal deteching circuits when in running order
Timesharing detection two independent gap widths of output.
Each high-frequency signal source is connected by corresponding controllable HF switch with corresponding detection coil, two high-frequency signals
Independently of each other, frequency can be the same or different in source (S1 and S2).Two detection coil sizes are identical, around to identical, and two
A coil space overlapping, has identical electrical parameter.Two controllable switches (K1 and K2) at the same by sequence controller (T) control
System, only there are one switches to be closed in any time period, i.e., only there are one detection coil is in running order, another detection coil
In off state.Two signal deteching circuits (PS1 and PS2) at the same by sequence controller (T) control, only in respective switch
Signal deteching circuit is just detected the signal of corresponding detection coil when closure, two detection coils and two signal detection electricity
Road timesharing detects two independent gap widths.Any one detection coil testing result is not by another coil working feelings in single probe
Condition influences, independent mutually between the output of two signal deteching circuits (PS1 and PS2).Two signal deteching circuits (PS1 and
PS2 output) is connected with the input terminal of self-diagnosis unit switches (D), and whether self-diagnosis unit switches (D) output characterization working sensor state
Normal autodiagnosis break signal.
Claims (7)
1. a kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors, including be connected with high-frequency signal source on car body
Controllable HF switch, the probe coil being connected with controllable HF switch, the signal deteching circuit being connect with probe coil, with letter
The connected self-diagnosis unit switches of number detection circuit；It is characterized in that, sensor is made of single probe, there are two detections for probe coil
Coil（L1, L2）；Two detection coils（L1, L2）Size and around to identical, and be spatially completely superposed；Two detection coils
（L1, L2）Input terminal pass through two controllable HF switches respectively（K1, K2）With two high-frequency signal sources（S1, S2）It is connected；Two
A detection coil（L1, L2）Output end respectively with mutually independent signal deteching circuit（PS1, PS2）It is connected；Controllable high frequency is opened
It closes and signal deteching circuit is gone back simultaneously and sequence controller（T）It is connected；Two signal deteching circuits（PS1, PS2）Output two is solely
Vertical gap measurement value, signal deteching circuit output is gone back and self-diagnosis unit switches（D）Input terminal be connected, self-diagnosis unit switches output pass
Sensor condition diagnosing signal.
2. a kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors according to claim 1, feature
It is, the concrete structure that the controllable HF switch is connected with high-frequency signal source and detection coil is：Each high-frequency signal source warp
It crosses corresponding controllable HF switch with corresponding detection coil to be connected, two high-frequency signal sources（S1, S2）Independently of each other, frequency
It can be the same or different.
3. a kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors according to claim 1, feature
It is, the detection coil arrangement concrete structure is：Two detection coil sizes are identical, around to identical, two coil space weights
It is folded, there is identical electrical parameter.
4. a kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors according to claim 1, feature
It is, described two controllable switches（K1, K2）Simultaneously by sequence controller（T）Control, only there are one switches in any time period
It is closed, i.e., only in running order there are one detection coil, another detection coil is in off state.
5. a kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors according to claim 1, feature
It is, described two signal deteching circuits（PS1, PS2）Simultaneously by sequence controller（T）Control is only closed in respective switch
When signal deteching circuit just the signal of corresponding detection coil is detected, two detection coils and two signal deteching circuits point
When detect two independent gap widths.
6. a kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors according to claim 1, feature
It is, any one detection coil testing result is not influenced by another coil working situation in single probe, two signal inspections
Slowdown monitoring circuit（PS1, PS2）Output between it is independent mutually.
7. a kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors according to claim 1, feature
It is, described two signal deteching circuits（PS1, PS2）Output and self-diagnosis unit switches（D）Input terminal be connected, self diagnosis list
Member（D）The output characterization whether normal autodiagnosis break signal of working sensor state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510740782.7A CN105352425B (en) | 2015-11-03 | 2015-11-03 | A kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510740782.7A CN105352425B (en) | 2015-11-03 | 2015-11-03 | A kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors |
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| Publication Number | Publication Date |
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| CN105352425A CN105352425A (en) | 2016-02-24 |
| CN105352425B true CN105352425B (en) | 2018-09-21 |
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| CN201510740782.7A Expired - Fee Related CN105352425B (en) | 2015-11-03 | 2015-11-03 | A kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333810B (en) * | 2015-11-03 | 2018-01-05 | 西南交通大学 | The probe timesharing detection medium-and low-speed maglev train gap sensor of one kind three |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4812757A (en) * | 1985-05-04 | 1989-03-14 | Thyssen Industrie Ag | Method and device for accurately determining the distance of a magnetic sensor from a conductive reaction rail |
| CN1584491A (en) * | 2004-05-25 | 2005-02-23 | 上海磁浮交通工程技术研究中心 | Gap displacing sensor of high-speed magnetic suspension train |
| CN1745708A (en) * | 2005-08-12 | 2006-03-15 | 中国人民解放军空军航空医学研究所 | The motivational techniques of sensing coiles of multi-channel breathing sensitive volume discribing and device |
| CN101750001A (en) * | 2009-12-31 | 2010-06-23 | 中国人民解放军国防科学技术大学 | Self-diagnosis levitation gap sensor for low-speed maglev train |
| CN205245985U (en) * | 2015-11-03 | 2016-05-18 | 西南交通大学 | Twin coil self -diagnosis maglev train that singly pops one's head in suspension air gap measuring device |
-
2015
- 2015-11-03 CN CN201510740782.7A patent/CN105352425B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4812757A (en) * | 1985-05-04 | 1989-03-14 | Thyssen Industrie Ag | Method and device for accurately determining the distance of a magnetic sensor from a conductive reaction rail |
| CN1584491A (en) * | 2004-05-25 | 2005-02-23 | 上海磁浮交通工程技术研究中心 | Gap displacing sensor of high-speed magnetic suspension train |
| CN1745708A (en) * | 2005-08-12 | 2006-03-15 | 中国人民解放军空军航空医学研究所 | The motivational techniques of sensing coiles of multi-channel breathing sensitive volume discribing and device |
| CN101750001A (en) * | 2009-12-31 | 2010-06-23 | 中国人民解放军国防科学技术大学 | Self-diagnosis levitation gap sensor for low-speed maglev train |
| CN205245985U (en) * | 2015-11-03 | 2016-05-18 | 西南交通大学 | Twin coil self -diagnosis maglev train that singly pops one's head in suspension air gap measuring device |
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