CN1143751A - Micropower impulse radar based wheel detector - Google Patents
Micropower impulse radar based wheel detector Download PDFInfo
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- CN1143751A CN1143751A CN96106957.0A CN96106957A CN1143751A CN 1143751 A CN1143751 A CN 1143751A CN 96106957 A CN96106957 A CN 96106957A CN 1143751 A CN1143751 A CN 1143751A
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- 238000012545 processing Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 5
- 238000003745 diagnosis Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 101100172132 Mus musculus Eif3a gene Proteins 0.000 description 4
- 230000005355 Hall effect Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 3
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/163—Detection devices
- B61L1/165—Electrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/163—Detection devices
- B61L1/166—Optical
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/04—Systems determining presence of a target
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
- G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
- G01S13/18—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein range gates are used
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
- G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Radar Systems Or Details Thereof (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A wheel detector for indicating the presence of a rail vehicle on a set of spaced rails is disclosed. The wheel detector transmits a radar pulse signal and samples a portion of the signal corresponding to a target area on one of the rails. The wheel detector will generate an indication signal if a change in the reflectivity of the received signal corresponding to the target area is detected. The wheel detector may additionally include multiple transmitters and receivers to provide redundancy, and be configured to determine the linear velocity and direction of a wheel.
Description
The applicant asks the rights and interests of No. 60/001,262, the U.S. Patent application submitted to July 20 nineteen ninety-five, and with in its content instructions incorporated herein by reference.
The present invention relates generally to the train wheel detector, relate in particular to and utilize micropower impulse radar to measure train wheel at wheel detector along position, direction and linear velocity on the point of fixity of passing road.
It is a kind of groundwork of railway industry that wheel is surveyed.Wheel detector can be used for determining train position and direction, measures train speed and resistance to rolling, confirms track circuit and detector on the scene, and starts various control sequences.
Develop some equipment and surveyed the appearance of train wheel.U.S. Patent number 4,200,855 disclose a kind of latch shape rolling stock detector, wherein, a pair of latch shape sensor unit are fixed in the hole on the web joint part that is formed at rail.This detector also is included in the strainmeter that stretches under the load of wheel.This stretching changes the resistance of strainmeter and can detect wheel.U.S. Patent number 4,200,856 disclose a kind of difference clamps the railway car wheel detector.This detector comprises the clamping sensor unit on the upper surface of a pair of base flange that is positioned at rail.A pair of C-clamp is fixed on these unit units on the base flange.Strain gauge element in this detector is subjected to the pressure of wheel weight.The appearance of wheel can detect by the resistance that monitors strainmeter.
United States Patent (USP) 4,524,932 disclose the railway car wheel detector that employing Hall (Hall) response element comes detecting wheel.Hall effect element is mounted in a permanent magnet top and this assembly is installed in and makes on the rail between this assembly and rail and to form a space.The appearance of wheel makes the magnetic flux level increase and improve immediately the output voltage of Hall effect element in the space.The existence of the Hall effect element output voltage indication train wheel that increases.
As mentioned above, each in these equipment all needs physically to be connected on the coupling part or base flange of rail.Correspondingly, during train passed through, these equipment were subject to judder.This vibration can be damaged detector assembly or be made the calibration of sensor element deviation occur, thereby causes the too much maintenance and the inefficacy of wheel detector.In addition, being used in installation component in the prior art equipment must provide and be fastenedly connected and become complicated and restricted subsequently in application.
Therefore, it is significant wheel detector being placed on the place of leaving railway track.Yet prior art equipment needs physical connection on rail, and is not suitable for reliable, accurate and low-power remote probe train wheel.
Other experimental equipment does not provide feasible solution.Especially, the fact proves, owing to comprise unfavourable weather condition and frangibility interior all multifactor, the scheme of utilizing photoelectric tube, laser and other photo-detector is insecure.
In addition, prior art equipment does not provide fault-tolerant, error detection and high reliability in single wheel detector.Moreover, on two positions on the rail, need two prior art equipment to come the appearance of detecting wheel to determine linear velocity and direction.
Therefore, the purpose of this invention is to provide a kind of reliable, fault-tolerant, fault diagnosis and do not need the wheel detector of physical connection on rail.Appearance and the linear velocity of simultaneously measuring wheel and the single equipment of determining its direction of another object of the present invention for detectable wheel is provided.Another purpose of the present invention is for providing a kind of wheel detector that can easily install and calibrate and only need hang down maintenance rate.Another purpose again of the present invention is not subjected to electromagnetism and Radio frequency interference (RFI) and weather conditions variable effect for providing a kind of, and does not disturb the wheel detector of other railway electronic equipment.
The invention provides a kind of by indicate the wheel detector of the appearance of the rolling stock on one group of isolated rail in the appearance of detecting wheel on one of rail.This wheel detector comprises a radar pulse signal generator and a transmitter, is used for sending radar pulse signal to one of rail.This wheel detector also comprises a receiver, is used to sample from the radar pulse signal of one first target area reflection of the top of one of rail.Receiver and transmitter are preferably in transversely and separate with rail.
This wheel detector also has a displacement processor, is used to monitor the radar pulse signal that returns from first target area.The displacement processor responds the change with the reflectivity of the corresponding radar pulse signal of appearance of wheel in first target area, generates an indicator signal.The displacement processor can be configured to also monitor that two target areas on the rail are to provide the speed calculation from a single wheel detector.Wheel detector can comprise that also three transmitters and receiver are to provide reliable and fault tolerant operation and wheel directional information.
By the reference accompanying drawing, the present invention will be more readily understood person skilled in the art person, in the accompanying drawing:
The skeleton view that Fig. 1 separates for horizontal and rail according to wheel detector of the present invention;
Fig. 2 a surveys the block scheme of micropower impulse radar circuit of the appearance of train wheel for emission broadband spread-spectrum pulse;
Fig. 2 b is for sampling with the appearance of detecting wheel and the block scheme of the micropower impulse radar circuit of an indicator signal being provided when detecting wheel to the echo series of complexity;
Fig. 3 is for laterally and rail separates and calibrated so that the planimetric map of the wheel detector of the micropower impulse radar of two last detecting wheels of distance in the above;
Fig. 4 is for further comprising a time division multiplex being used to survey on the rail the last train wheel of two distances functional block diagram apart from the micropower impulse radar circuit of circuit;
Fig. 5 separates and has the planimetric map of the wheel detector of three micropower impulse radars for horizontal and rail:
Fig. 6 is the functional block diagram of the wheel detector operated in discrete I/O pattern;
Fig. 7 is the functional block diagram of the wheel detector operated in LAN (Local Area Network);
Fig. 8 is for being spaced laterally apart with rail and connect at a carrier sense multiple access/planimetric map of a plurality of wheel detectors in collision detection (uncertainty) LAN configuration;
Fig. 9 is for being spaced laterally apart with rail and the planimetric map of a plurality of wheel detectors in a token ring (determinacy) LAN configuration; And
Figure 10 is the synoptic diagram according to an one exemplary embodiment of wheel detector of the present invention.
The invention provides a kind of micropower impulse radar (MIR) that utilizes at fault-tolerant, fault diagnosis and high reliability wheel detector along appearance, direction and the linear velocity of surveying train wheel on the specified point of passing road.(radar pulse recurrence interval) upward has the wideband pulse of amplifying noise to the passing road emission to transmitter in the micropower impulse radar in the recurrence interval of presetting.If a train wheel passes through along the preset distance increment group on the point of passing road, just generate an alerting signal.Wheel detector can be used in basic discrete I/O (I O) design or the Local Area Network configuration.
Fig. 1 illustrates a wheel detector 10 adjacent with rail 20.Wheel detector 10 can be placed in the scope of 20 4 gauge width of rail, and can be connected on the rail 20 or physically, or separates with rail 20, as shown in Figure 1.
A pair of installation stake 14a and 14b can have hole 16a and 16b to admit wheel detector 10 and to allow that it is elevation angle calibration and vertical rotation.Wheel detector 10 preferably should be positioned at wheel 18 same surface levels on to reduce the elevation angle and to improve the signal to noise ratio (S/N ratio) (referring to Fig. 2 a and Fig. 2 b) of the receiver output signal 41 of micropower impulse radar 26.
Fig. 2 a and Fig. 2 b are U.S. Patent number 5,361, and the functional block diagram of disclosed micropower impulse radar 26 is combined in this with them by reference in 070.Fig. 2 a and Fig. 2 b illustrate the emission and the receiving-member of micropower impulse radar 26.Particularly, first party wave oscillator 30 generates a radar pulse recurrence interval (PRI) on a selected frequency between 30KHz and the 2MHz.Noise generator 28 is introduced a kind of random variation and is made randomization launch time of radar pulse signal 33 on the radar pulse recurrence interval, and generates one traditional receiver be it seems the spread-spectrum that resembles random noise.First party wave oscillator 30 can be connected on the step generator 32, it generates transponder pulse according to the radar pulse recurrence interval, and radar pulse signal 33 is via transmitter antenna 42 emissions.The bandwidth of each pulse of radar pulse signal is good with 0.1ns.
When pulse is outwards propagated, be subjected to reflected by objects on every side, and a compound echo series turns back to receiver antenna 43 as the radar pulse signal 34 that receives.First party wave oscillator 30 is connected on the pulse receiver 40 via time delay device 36.Time delay device 36 is added in time delay on the radar pulse recurrence interval corresponding to reflection interval back and forth of radar pulse signal 33 between the target area 22 on micropower impulse radar 26 and the rail 20.Adjust target area 22 by the distance control 38 that can change time delay.
Appearance in the target area 22 of wheel 18 on rail 20 changes the radar reflectivity of the radar pulse signal 34 that is received.Pulse receiver 40 acts on a receiver output signal 41 on the displacement processor 44.Displacement processor 44 compares receiver output signal 41 and a reference voltage, if the reflectivity of the radar pulse signal 34 that is received has changed, just generate an indicator signal 46.
By sensitivity control 45 and can change the sensitivity of displacement processor 44 according to the intensity of receiver output signal 41.This control can reduce the sensitivity of 10 pairs of rainwater of wheel detector, insect and the mixed and disorderly wave source of other environment.
In the second embodiment of the present invention shown in Fig. 3, micropower impulse radar 26 can be applicable in two detection modes.The appearance of detecting wheel 18 on one first target area 22a that micropower impulse radar 26 among this embodiment is configured at passing road and one the second target area 122a.
Fig. 4 is the functional block diagram of second embodiment of wheel detector 10, wherein, micropower impulse radar 26 is modified as comprises a time division multiplex apart from circuit.Particularly, by an analog switch 48 receiver output signal 41 is acted on one first displacement processor 44a and one the second motion process device 44b.A second party wave oscillator 47 is acted on time delay device 36 and the analog switch 48.Analog switch 48 respectively replaces the distance of pulse receiver 40 time interval between one first distance corresponding to the first target area 22a reaches corresponding to the second distance of the second target area 122a.First distance monitors that by the first displacement processor 44a second distance is then monitored by the second motion process device 44b.The distance of micropower impulse radar 26 can be adjusted by distance control 38.
As shown in Figure 3, wheel detector 10 is positioned at contiguous rail 20 places and calibration is the chi orientation separation of the first target area 22a and the second target area 122a.Set micropower impulse radar 26 when being positioned at the first target area 22a triggering one first indicator signal 46a and when wheel 18 is positioned at the second target area 122a, to set micropower impulse radar 26 triggering one second indicator signal, be used for the linear velocity detection and wheel detector 10 is scaled at wheel 18.Can calculate the linear velocity of wheel 18 by the time interval between two indicator signal 46a of timing and the 146a.
As shown in Figure 10, wheel detector 10 can also comprise three micropower impulse radar 26a, 26b and 26c, is used for determining the linear direction of wheel 18.For example, as shown in Figure 5, a wheel of advancing from right to left 18 will at first be detected by the first micropower impulse radar 26a on the first target area 22a, is then detected by the second micropower impulse radar 26c on the one target area 22b of back.Therefore, at first trigger the direction which micropower impulse radar 26 just can be determined wheel 18 by detecting wheel 18.The linear direction that depends on wheel 18, when wheel 18 passes through target area 22a, 22b, 22c or 222c, 222b, 222a, the wheel detector 10 shown in Fig. 5 will generate three indicator signal 46a, 46b and 46c.
As shown in Fig. 6 and Fig. 7, indicator signal 46a, 46b and 46c can be acted on the logic processor 50.Logic processor 50 is carried out fault detect by analyzing three indicator signal 46a, 46b and 46c.If whole three micropower impulse radar 26a, 26b and 26c do not detect the wheel 18 by target area 22a, 22b and 22c, just represent fault.
Discrete I in the O pattern as each micropower impulse radar 26 in the wheel detector 10 of linear velocity detector operation can by two 24 vor signals of relay 52 outputs give I O processor 54.Each output signal is corresponding to detect wheel 18 in the first target area 22a or the second target area 122a.Main central processing unit 56 calculates time of passing between two signals and according to the distance calculation speed between the first target area 22a and the second target area 122a.Main central processing unit 56 also can at first trigger the linear direction which micropower impulse radar 26 is determined wheel 18 by analysing vehicle wheels 18.
Depend on working environment, may wish main central processing unit 56 is configured to carry out some or all logic function.Therefore, wheel detector 10 can be designed to by relay 52 directly indicator signal 46 is exported to I O processor 54.Subsequently main central processing unit 56 from I O processor 54 read and handle the output of wheel detector 10.Main central processing unit 56 can carry out fault detect, fault diagnosis and comprise fault-tolerant, as with a kind of replacement scheme on the printed circuit board (PCB) (PCB) of these logic function hardwires in wheel detector 10.
As discrete I a kind of of O pattern substitute, wheel detector 10 can be used on such as in the LAN configuration such as token ring (determinacy) LAN configuration or carrier sense multiple access connection/collision detection (CSMA/CD) (uncertainty) LAN configuration.
The function of micropower impulse radar 26 in LAN configuration and front discrete I O identical described in disposing.As shown in Figure 7, indicator signal 46 is to act on the logic processor 50 that can carry out fault detect, fault diagnosis and fault tolerance therein.The output action of logic processor 50 is on a local CPU (central processing unit) 60.
The output of local CPU (central processing unit) 60 processing logic processors 50 is to determine appearance, linear velocity and the direction of wheel 18.Counter 66 of local CPU (central processing unit) 60 usefulness is determined at time interval of detecting wheel 18 on the first target area 22a and second target area 122a linear velocity with definite wheel 18.As an alternative, can be between single micropower impulse radar 26a, 26b and 26c minute at interval.Utilize three micropower impulse radar 26a, 26b and 26c to provide fault tolerant operation also can determine the linear direction of wheel 18.
Be similar to wheel detector 10 discrete I operation in the O pattern, the fault logic function can be carried out by logic processor 50 or by local CPU (central processing unit) 60 as previously mentioned.
Wheel appearance, linear velocity and directional data are submitted to network controller 62 from local CPU (central processing unit) 60, there it is ready to for by LAN be transferred to I O processor 54.I O processor 54 tissue and storage data and the parking lot profile that when receiving request, will analyze be transferred to main central processing unit 56.
Can in a CSMA/CD LAN configuration, arrange a plurality of wheel detectors 10, as shown in Figure 8.Each wheel detector 10 in this configuration when bus 70 is unimpeded, try hard to by network controller 62 with its latest data be transferred to I O processor 54.If occurring then not transmitting data on the bus 70 from the conflict between the signal of different wheel detector 10.Each wheel detector 10 is unimpeded and transmitted its data and end up to bus 70 with continuing to try hard to transmit its latest data.Operation in the CSMA/CD configuration may require network load to be not more than 51 of capacity.
Fig. 9 illustrates and is arranged in a plurality of wheel detectors 10 in the token ring lan configuration.Each wheel detector 10 is connected on the token ring 68 by network controller 62.Will be in I O processor 54, so that be transferred to main central processing unit 56 from the data storage of wheel detector 10.Main central processing unit 56 starting makes it can read one of all-network controller 62 data transfer processes orderly in order.System software is with dynamic position, direction and the speed data of predetermined sequencing by the appointment linear range.From the velocity profile on the linear range of this rail, also can draw acceleration calculation.
Owing to when token sequentially transmits whole token ring lan, one after the other measured, preferably token ring lan is used as the velocity profile maker along the spot speed on the link position of rail 20.In this LAN configuration, obtain some spot speed and can determine acceleration information efficiently.This system can be used on a train in the speed control in the classification parking lot that many locational speed all must be known is used.
The operation of two kinds of LAN configuration can both enhancement wheel detectors 10.When wheel detector 10 is used in velocity profile and the acceleration application, select token LAN configuration for use better.Otherwise,, then select the CSMA/CD configuration for use better if wheel detector 10 is mainly used to determine that wheel appearance or linear direction and network load are fully low.
The synoptic diagram of one embodiment of the present of invention has been shown among Figure 10.The transmitter antenna 42 of micropower impulse radar 26 is with one first target area 22a and the second target area 122a emission of radar pulse signal 33 on the rail (not shown).Micropower impulse radar 26 generates corresponding to the indicator signal 46a and the 146a that detect wheel 18 in the first target area 22a and the second target area 122a.The distance control 38 of micropower impulse radar 26 can realize that apart from pot 86a, 86b and 86c sensitivity control 45 then available a plurality of sensitivity pot 87a, 87h and 87c realize with a plurality of.
The indicator signal of buffering is acted on a plurality of univibrator 72a, 72b and the 72c simultaneously.Univibrator 72a, 72b and 72c keep adequate time with the indicator signal of buffering, whereby synchronously from the indicator signal of each buffering of each micropower impulse radar 26a, 26b and 26c.Because therefore each micropower impulse radar 26a, 26b will need the coupling of the indicator signal of buffering at different instantaneous adjoining land detecting wheels 18 with 26c.
Output action with univibrator 72a, 72b and 72c supplies to be transferred to local CPU (central processing unit) 60 on latch 55 in the present embodiment.Local CPU (central processing unit) 60 is passed through each wheel detector 10 of address comparator 79 addressing with starting transmission from latch 55 to local CPU (central processing unit) 60 with the wheel detection data.
Also with monostable 72 output action on logic processor 50.With the output action of logic processor 50 on relay 52 for be transferred to by discrete interfaces 53 I O processor 54.Discrete interfaces 53 adds to each single wheel detector 10 an on-the-spot test pilot is provided.In addition, a DC-DC translator 76 is supplied 5 vor signals to 5 volts of micropower impulse radar 26 circuit.
List the parts that can be used for constituting the embodiments of the invention shown in Figure 10 in the following table:
| Reference number | Part description | Part number | Supplier |
| ????26 | Micropower impulse radar | ?????ASIC | Lawrence livermore laboratory |
| ????52 | Relay | 6200 series | ????????Coto?Wabash |
| ????55 | Latch | ????74HC573 | The Texas instrument |
| ????63 | Impact damper | ????74HC808 | The Texas instrument |
| ????72 | Univibrator | ????74HC4538 | Motorola inc |
| ????76 | The DC-DC converter | ???24VDC-5VDC | The Pico electronics |
| ????79 | Address comparator | ????74HC688 | The Texas instrument |
| ???86，87 | Pot | 3099 series | ????????????Bourns |
Though describe and show some preferred embodiments at this, should be understood that and in the scope of following claims, to make other embodiment miscellaneous and modification.
Claims (34)
1. the device that occurs rolling stock on this group rail is indicated in the appearance of surveying a wheel on one of the rail that is used for by separating at a group, it is characterized in that comprising:
A. many radar pulse generators are used to produce a plurality of radar pulse signals, and the reflectivity of wherein said radar pulse signal is changed by the contact of the object in the environment;
B. many transmitters be used for the target area of described radar pulse signal emission above one of described rail, and described transmitter are connected on the described radar pulse generator and described transmitter is to be spaced laterally apart with one of these rails;
C. many receivers corresponding with each described transmitter, the radar pulse signal of a plurality of receptions that reflect from described target area of being used to sample, and described receiver is spaced laterally apart with one of these rails;
D. at least one displacement processor is used to generate an indicator signal, and this indicator signal is corresponding to the radar pulse signal that has from each described reception of the altered reflectivity of the displacement of the wheel in the described target area; And
E. be connected a logic processor on described at least one displacement processor, be used to respond a plurality of described indicator signals and generate a wheel detectable signal.
2. sniffer according to claim 1 wherein, connects each described radar pulse generator thereon, described transmitter, described receiver, and described at least one displacement processor monolithic semiconductor made.
3. sniffer according to claim 1, wherein, one the first radar pulse signal sampling of receiver to receiving from first of first target area, one the second radar pulse signal sampling of receiver to receiving from second of second target area, described at least one displacement processor generates corresponding to first indicator signal of the reflectance varies of described first radar pulse signal that receives and generates second indicator signal corresponding to the variation of the reflectivity of described second radar pulse signal that receives, and the direction of described logic processor definite wheel from described first indicator signal and described second indicator signal.
4. sniffer according to claim 1, wherein, each described receiver is to taking a sample from first radar pulse signal that receives of first target area and from second radar pulse signal that receives of second target area, described at least one displacement processor generates corresponding to first indicator signal of the variation of the reflectivity of described first radar pulse signal that receives and generates second indicator signal corresponding to the variation of the reflectivity of described second radar pulse signal that receives, and the linear spot speed of described logic processor definite wheel from described first indicator signal and described second indicator signal.
5. sniffer according to claim 4 also comprises a counter, is used for the linear spot speed of the definite wheel of time interval confession between described first indicator signal of timing and described second indicator signal.
6. sniffer according to claim 1, wherein, described sniffer physically separates with rail.
7. sniffer according to claim 6, wherein said sniffer are positioned within four gauge width of one of rail.
8. one kind is used for the device of indicating the appearance of a rolling stock on one group of rail that separates in the appearance of the wheel on one of rail by surveying, and it is characterized in that comprising:
A. a radar pulse signal generator is used to generate a radar pulse signal, and the reflectivity of wherein said radar pulse signal is subjected to the change that contacts with object in the environment;
B. a transmitter that is connected on the described radar pulse signal generator be used for described radar pulse signal is launched to one of rail, and described transmitter is spaced laterally apart with one of rail;
C. receiver, be used to sample from first radar pulse signal that receives of one first target area reflection of one of rail top and from second radar pulse signal that receives of one second target area reflection of one of rail top, and described receiver is spaced laterally apart with one of rail; And
D. displacement processor, the variation that the variation that is used to respond the reflectivity of described first radar pulse signal that receives generates first indicator signal and responds the reflectivity of described second radar pulse signal that receives generates second indicator signal, and described displacement processor is connected on the described receiver.
9. sniffer according to claim 8 also comprises a counter, be used for the time interval between described first indicator signal of timing and described second indicator signal, and described counter is connected on the described displacement processor.
10. sniffer according to claim 8, wherein said radar pulse generator, described transmitter, described receiver, and described displacement processor monolithic semiconductor made.
11. sniffer according to claim 8, wherein said sniffer physically separates with rail.
12. sniffer according to claim 11, wherein said sniffer are positioned within four gauge width of one of rail.
13. sniffer according to claim 8, wheel wherein is by described first target area and described second target area.
14. sniffer according to claim 8, also comprise a time delay device, be used to adjust the sample time of described receiver, so that corresponding to described first radar pulse signal that receives of described first target area and the radar pulse signal sampling that receives corresponding to described second of described second target area, and described time delay device is connected between described radar pulse generator and the described receiver.
15. sniffer according to claim 14, wherein said radar pulse generator, described transmitter, described receiver, described displacement processor and described time delay device monolithic semiconductor made.
16. one kind is used for it is characterized in that comprising by indicate the device of the appearance of a rolling stock on one group of rail that separates in the appearance of detecting wheel on one of rail:
A. a radar pulse signal generator is used to produce radar pulse signal, the reflectivity of wherein said radar pulse signal be subjected to environment in the change that contacts of object;
B. a transmitter that is connected on the described radar pulse signal generator be used for described radar pulse signal is launched to one of rail, and described transmitter is spaced laterally apart with one of rail;
C. receiver be used to sample from the radar pulse signal of the reception of described target area reflection, and described receiver is spaced laterally apart with one of rail;
D. a time delay device be used to adjust the sample time of described receiver and define described target area whereby, and described time delay device is between described radar pulse signal generator and described receiver; And
E. displacement processor, the change of reflectivity that is used to respond the radar pulse signal of described reception generates the wheel detectable signal, and described motion process device is connected on the described receiver.
17. sniffer according to claim 16, wherein said radar pulse generator, described transmitter, described time delay device, described receiver and described displacement processor monolithic semiconductor made.
18. sniffer according to claim 16, wherein said target area comprises one first target area and one second target area, and the radar pulse signal of described reception comprises one first radar pulse signal that receives and one second radar pulse signal that receives.
19. sniffer according to claim 18, wherein said receiver is sampled to the radar pulse signal that receives from first of described first target area and from second radar pulse signal that receives of described second target area, and described displacement processor generates corresponding to first indicator signal of the variation of the reflectivity of described first radar pulse signal that receives and corresponding to second indicator signal of the variation of the reflectivity of described second radar pulse signal that receives.
20. sniffer according to claim 19 also comprises a counter, is used for the time interval between described first indicator signal of timing and described second indicator signal, for the linear spot speed of determining wheel.
21. sniffer according to claim 16, wherein said sniffer physically separates with rail.
22. sniffer according to claim 21, wherein said sniffer are positioned within four gauge width of one of rail.
23. the method for the appearance of the rolling stock of an indication on one group of rail that separates is characterized in that comprising the steps:
A. launch first radar pulse signal from one first fixed position that is spaced laterally apart with rail to first target area of one of rail top;
B. sample corresponding to a first of first radar pulse signal of this first target area;
C. analyze this first and survey variation corresponding to the reflectivity of first radar pulse signal that wheel in first target area, occurs; And
D. respond in first target area and detect wheel, indicate the appearance of this rolling stock.
24. method according to claim 23 also comprises the step that the indication of this wheel in first target area is counted.
25. method according to claim 23, wherein, the transmitter of first radar pulse signal and receiver separate with rail physically.
26. method according to claim 25, wherein, one of transmitter and receiver and rail separate in four gauge width.
27. method according to claim 23 also comprises the steps:
E. launch first radar pulse signal from first fixed position that is spaced laterally apart with this rail to one second target area of one of this rail top;
F. sample corresponding to the second portion of first radar pulse signal of second target area;
G. analyze this second portion to survey variation corresponding to the reflectivity of first radar pulse signal that wheel in this second target area, occurs; And
H. respond in second target area and detect wheel, the appearance of indication rolling stock.
28. method according to claim 27 also comprises the step of the linear velocity of calculating wheel.
29. the method for rolling stock appears in an indication on one group of rail that separates, it is characterized in that comprising the steps:
A. from a fixed position that is spaced laterally apart with this rail, launch a plurality of radar pulse signals to a plurality of target areas of one of this rail top;
B. sample corresponding to the first of each radar pulse signal of these target areas;
C. analyze these firsts to survey variation corresponding to the reflectivity of these radar pulse signals that wheel in these target areas, occurs; And
D. respond in these target areas and detect wheel, the appearance of indication rolling stock.
30. method according to claim 29 also comprises the step of the linear velocity of calculating wheel:
31. method according to claim 29 also comprises the step of the direction of determining wheel:
32. method according to claim 29 also comprises the step of counting the wheel in these target areas:
33. method according to claim 29, wherein, many transmitters and many receivers of these radar pulse signals physically separate with these rails.
34. method according to claim 33, wherein these transmitters and one of these receivers and these rails separate in four gauge width.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US126295P | 1995-07-20 | 1995-07-20 | |
| US60/001262 | 1995-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1143751A true CN1143751A (en) | 1997-02-26 |
Family
ID=21695162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96106957.0A Pending CN1143751A (en) | 1995-07-20 | 1996-07-19 | Micropower impulse radar based wheel detector |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN1143751A (en) |
| DE (1) | DE19628884A1 (en) |
| GB (1) | GB2303510A (en) |
| IT (1) | IT1284212B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115140118A (en) * | 2022-07-15 | 2022-10-04 | 北京全路通信信号研究设计院集团有限公司 | Axle counting method and system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007031139A1 (en) * | 2007-06-29 | 2009-01-02 | Siemens Ag | Method for increasing the interference immunity of a wheel sensor and wheel sensor for carrying out the method |
| CN106895859A (en) * | 2015-12-19 | 2017-06-27 | 山东优联智能科技有限公司 | A kind of multipurpose track sensor |
| DE102019215844A1 (en) * | 2019-07-23 | 2021-01-28 | Siemens Mobility GmbH | Sensor device for an arrangement for the detection and analysis of a wheel of a vehicle moving along a track, in particular along a track |
| WO2022089689A1 (en) | 2020-10-27 | 2022-05-05 | Pintsch Gmbh | Proximity switch, method for operating such a switch, and arrangement and method for monitoring a track section |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB875918A (en) * | 1957-01-14 | 1961-08-23 | Plessey Co Ltd | Improved radio apparatus adapted to obtain information from bodies in motion |
| DE1144953B (en) * | 1960-03-09 | 1963-03-07 | Telefunken Patent | Arrangement for determining and evaluating the fill level of traffic routes |
| GB1082109A (en) * | 1965-12-24 | 1967-09-06 | American Brake Shoe Co | Microwave identification of railroad cars |
| GB1315533A (en) * | 1970-06-24 | 1973-05-02 | Pye Ltd | Vehicle monitoring radar apparatus |
| GB1479616A (en) * | 1974-10-15 | 1977-07-13 | Standard Telephones Cables Ltd | Train position indication |
| DE3025718C2 (en) * | 1980-07-07 | 1982-10-28 | Siemens AG, 1000 Berlin und 8000 München | Device for tracking the path of lane-guided vehicles |
| DE3235733A1 (en) * | 1982-09-27 | 1984-03-29 | Siemens AG, 1000 Berlin und 8000 München | Device for track-free signalling |
| DE3920154A1 (en) * | 1989-06-20 | 1991-01-10 | Siemens Ag | DEVICE FOR CLEARING THE TRACK IN RAILWAYS |
| FR2691262B3 (en) * | 1992-05-15 | 1994-10-21 | Gerard Desclos | Portable and autonomous security device for detecting mobile vehicles. |
| US5361070B1 (en) * | 1993-04-12 | 2000-05-16 | Univ California | Ultra-wideband radar motion sensor |
-
1996
- 1996-07-05 GB GB9614222A patent/GB2303510A/en not_active Withdrawn
- 1996-07-15 IT IT96RM000504A patent/IT1284212B1/en active IP Right Grant
- 1996-07-17 DE DE19628884A patent/DE19628884A1/en not_active Withdrawn
- 1996-07-19 CN CN96106957.0A patent/CN1143751A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115140118A (en) * | 2022-07-15 | 2022-10-04 | 北京全路通信信号研究设计院集团有限公司 | Axle counting method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| ITRM960504A0 (en) | 1996-07-15 |
| GB9614222D0 (en) | 1996-09-04 |
| DE19628884A1 (en) | 1997-01-23 |
| IT1284212B1 (en) | 1998-05-14 |
| ITRM960504A1 (en) | 1998-01-15 |
| GB2303510A (en) | 1997-02-19 |
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