Apparatus and method for the speed of measure track vehicleTechnical field
Test the speed field the present invention relates to rail traffic vehicles, and in particular to a kind of dress of speed for measure track vehiclePut and method, in particular for the apparatus and method of the speed of low speed magnetic suspension vehicle in measurement.
Background technology
Middle low speed magnetic suspension vehicle as the vehicles of new generation, have speed is fast, route selection adaptable to landform moreFlexibly, many advantages, such as safe and environment-friendly.In maglev vehicle safety and automatic control system, vehicle position is accurately and timely obtainedPut it is new with speed, by Vehicular behavior real-time Transmission give ground control centre receive the order from control centre, this isThe basic guarantee of vehicle safety, reliability service.In maglev vehicle safety and command dispatching system, vehicle speed measuring alignment system hairWave important function.Vehicle operation control system will realize the functions such as automatic protection, automatic running and the automatic monitoring of vehicle, according toAccurate, the reliable car speed provided in vehicle speed measuring alignment system and positional information are provided.When being run in view of maglev vehicleContactless with track, traditional railway speed-measuring method can not achieve the speed-position detection of maglev vehicle.
At present, vehicle is tested the speed and is positioned frequently with the method for locating speed measurement of Doppler radar.According to microwave transmissionDoppler effect principle, mobile object can be measured with respect to the ground (movement velocity of roadbed ＞.Radar, thunder are installed on vehicleLaunch electromagnetic wave up to antenna to rail level, antenna is reflected back by rail level.Athletic meeting of the vehicle with respect to rail level causes transmitted wave and connectsThere are certain difference on the frequency, i.e. Doppler frequency between receipts ripple, its value is proportional to car speed and antenna beam direction and levelThe cosine value of ground angle.Running velocity can be measured around this principle.Ground of this method requirement as detection faces(track ＞ must ensure that radar has enough echoes, since sleety weather easily causes detection faces refraction radar wave, especially detectWhen face freezes, it can cause to measure by mistake, meanwhile, Doppler frequency is smaller during low speed, is vulnerable to external interference, can cause measurement essenceDegree declines.
The content of the invention
For the above problem in the presence of the prior art, the present invention proposes the dress of the speed for measure track vehiclePut and method.The apparatus structure is simple, and cost is very low, and precision is high, easy to operate, and has good maintainability.
It is used for the device of the speed of measure track vehicle according to the present invention, including：
At least two test devices, test device is fixed on vehicle along the direct of travel compartment of vehicle, andBy sending pulse signal during sleeper,
Processor, its time difference of pulse signal sent according at least two test devices and corresponding test device itBetween spacing distance and draw the speed of vehicle.
In one embodiment, it is sensor to test device.
In one embodiment, the spacing distance between adjacent test device is equal.
In one embodiment, test device is arranged at the bottom of vehicle.
In one embodiment, test device is arranged on vehicle by installing plate, is provided with installing plate for installingTest the adjustment hole of device.
In one embodiment, the quantity for testing device is 4 to 6.
According to the second aspect of the invention, there is provided a kind of method of speed for measure track vehicle, it includes：
Step 1：The distance between any two test device i, j L is pre-entered into processorij；
Step 2：Processor receives test device and passes through the pulse signal sent during sleeper, and obtains two pulsesTime difference t between signalij；
Step 3：The speed v=L of vehicleij/tij。
In one embodiment, the step of two in, obtain n time difference tij；In step 3, n speed is obtained firstSpend Vn=Lij/tij, wherein LijWith tijCorrespond to each other, the speed of vehicle is
Preferably, n time difference tijCome from the time difference between the pulse signal that test device adjacent to each other is sent.
In one embodiment, by testing sequencing that device is triggered to judge the directional velocity of vehicle.
Compared with prior art, it is an advantage of the current invention that device is simple, extra set need not be increased in orbitIt is standby, it can complete to measure using sensor detection sleeper.The present invention by changing the software of processor can achieve that precisionIt is it is required that easy to operate.Sensor uses non-contact speed measurement, remains to stablize output letter in the case where raining, the complicated weather condition such as snowNumber, strong environmental adaptability is applied widely.In underbody and using installing plate installation sensor, maintain easily and later period maintenance.
Brief description of the drawings
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing.In figure：
Fig. 1 shows the device for the speed for being used for measure track vehicle according to the present invention.
Fig. 2 shows the pulse diagram that sensor produces.
Fig. 3 shows installing plate according to the present invention.
In the accompanying drawings, identical component uses identical reference numeral.Attached drawing is not drawn according to actual ratio.
Embodiment
Below in conjunction with attached drawing, the present invention will be further described.
Fig. 1 schematically shows the device 10 for the speed of measure track vehicle.As shown in Figure 1, device 10 includesAt least two test devices 2.Test device 2 is arranged on vehicle 1 along the direct of travel compartment of vehicle 1, and tests device 2It is arranged in a linear.When vehicle 1 is run, at least two test devices 2 can be successively across sleeper 3, then multiple test devices 2 pass throughThe pulse signal (as shown in Figure 2) that phase lags successively can be produced during same sleeper 3.Device 10 further includes processor (in figure notShow), it sends the spacing distance between the time difference of pulse signal and corresponding test device 2 according to test device 2 and obtainsGo out the velocity magnitude of vehicle 1.
Thus, the present invention is to test the spacing between device 2 as the benchmark to test the speed, its be not relying between sleeper away fromFrom and obtain speed, avoiding distance between sleeper has the problem of inaccurate caused by certain error, so that rate accuracyHeight, good reliability.The present invention only by setting test device 2 and processor to obtain the speed of vehicle, pacify by test device 2Dress is convenient, simple in structure, and production cost is low, and maintenance workload is small.Even under the complicated weather condition such as sleet, as long as energyDetect indivedual sleepers, sensor just can output pulse signal, the speed of vehicle 1 just can be calculated, so that the device 10Adaptive faculty is strong, wide adaptation range.
According to the present invention, test device 2 is sensor, and the distance between adjacent sensor can it is equal can alsoIt is unequal.But in order to which subsequent treatment is simple, while improve calculating measuring accuracy, it is preferable that the distance between sensor phaseDeng.
In order to enable sensor can more accurately scan sleeper, sensor is installed at the bottom of vehicle 1.For simplificationSensor, can first be installed on installing plate 4, be then fixed on by installing plate 4 on vehicle 1, the structure of installing plate 4 is such as by installationShown in Fig. 3.Installing plate 4 includes the first connecting hole 41 for being arranged on its both ends, this connecting hole 41 is used for installing plate 4 and vehicle 1Bottom connection.For convenience, it can be bolted, and thereby simplify the installation and removal of installing plate 4, while convenientlyThe installation of sensor, replacement and dismounting.The adjustment hole 42 for installing sensor is additionally provided with installing plate 4.Adjustment hole42 are arranged in rows on the direct of travel of vehicle 1.Sensor can be connected on installing plate 4 by bolt, and thereby facilitating biographyThe dismounting and replacement of sensor.In order to facilitate the distance between sensor is reconciled, adjustment hole 42 is configured to the direct of travel along vehicle 1Slot hole.In addition, in order to avoid particular sensor damages, and measurement accuracy is influenced, it can also be set in the bottom of vehicle 1 multiple rows ofMultiple sensors.Therefore, the adjustment hole 42 of installing plate 4 can also be multiple rows of.It should be noted that the adjustment hole on installing plate 442 quantity, location and shape can need according to the different of real work and have different settings.For example, adjustment hole 42 is in carCan also be elongated hole on 1 direct of travel so that sensor can on the direct of travel of vehicle 1 change location.WhenSo, the shape and size of installing plate 4 can also have different settings according to different need of real work.For example, installationPlate 4 may be configured to circle it is so structured that square.
The method for describing the speed for measure track vehicle 1 in detail below according to Fig. 1 to 2.
Assuming that being provided with multiple (at least two) sensors in the bottom of vehicle 1, in vehicle traveling direction, sensor is usedNatural number marks successively, and the distance between any two sensor i, j are Lij(numeral in wherein i, j and S1~S5 matches,And i is not equal to j, such as L12For the distance between S1 and S2), when any two sensor i, j pass through same sleeper 3, sendPulse signal, and obtain the time difference t between two pulse signalsij(for example, shown in Fig. 2, when S1 and S2 pass through sleeper, S1 productionsIt is t at the time of corresponding to the rising edge of raw pulse1, and when S2 passes through same sleeper, corresponding to the rising edge of the pulse of generationAt the time of be t2, then the time difference t between two pulse signals12=t2-t1).V=L can then be passed throughij/tijDraw vehicle 1Speed.Wherein, two sensors of i, j can be that sensor adjacent to each other can also be sensor not adjacent to each other, as long asIt is that there is certain spacing between two sensors of i, j, and there is the time by pulse signal caused by same sleeperDifference, can pass through v=Lij/tijDraw the speed of vehicle 1.
In order to improve precision, in multiple and different sensors, n time difference t can obtainij(such as t12、t23Or t13Deng, wherein i, j is unequal, but two sensors are also not necessarily adjacent, that is, the difference of i and j differs and is set to 1), correspondinglyTo n speed Vn=Lij/tij(wherein LijWith tijCorrespond to each other, it is, LijIn i and j and tijIn i and j correspond to).ThenThe speed that vehicle can be obtained is：
For example, shown in Fig. 1,5 sensor S1-S5 are installed in the bottom of vehicle 1.Such as between 5 sensors away fromFrom all equal, that is, it is disposed as L.Show in fig. 2 during the traveling of vehicle 1, pulse caused by 5 sensors is believedNumber.Learn that the time difference that S1, S2 pass through identical sleeper 3 is t by processor12.So as to pass through v1=L/t12Obtain vehicle 1Speed.Similarly, it is t that the time difference that S2, S3 pass through same sleeper 3 is also seen by Fig. 223, you can obtain speed v2=L/t23。Successively, v can also be obtained3=L/t34, v4=L/t45.In order to enable velocity structure is more accurate, can be calculated by processor averageSpeed v=(v1+v2+v3+v4)/4 are using the speed as vehicle 1.
The distance between sensor is smaller, its rate accuracy is higher.Preferably, the spacing distance between adjacent sensors is20~50cm.For example, it may be configured as equidistant 30cm between adjacent sensors.This spacing distance ensure that what is tested the speed and positionAccuracy.
According to the order for the sensor being triggered, vehicle heading can be judged.As described in Figure 1, if passedThe order that sensor is triggered is：S1-S2-S3-S4-S5, or the order that sensor is triggered are identical with the direction of S1 to S5,For example, S3-S4-S5, then vehicle 1 is to right travel.On the contrary, the order that sensor is triggered is opposite with the direction of S1 to S5,For example, S3-S2-S1, then vehicle travels to the left.
It these are only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, any this areaTechnical staff in technical scope disclosed by the invention, easily can be changed or change, and this be altered or varied allIt is covered by the protection scope of the present invention.Therefore, protection scope of the present invention should using the protection domain of claims asIt is accurate.