CN2891095Y - Electronic tag for high-speed train - Google Patents

Abstract

The utility model discloses an electric label of high-speed train to improve the identification rate of the electric label of the high-speed train and adapt to need of high-speed running. The utility model applies the following technical proposal: an electric label for high-speed train comprises orderly connected aerial, power transformed data modulation circuit, label data processing module and writing interface, the label data processing module includes two-phase (FMO) encoder and memory device for store the two-phase result, signal generated from the encoder is delivered to aerial through first field transistor for amplitude modulation and coupler. The utility model, comparing to the present technology, includes two-phase (FMO) encoder and memory device, accelerates speed of information transmission by FMO encoding, improves recognition rate of train label to satisfy the need of high-speed train.

Description

The bullet train electronic tag

Technical field

The utility model relates to a kind of electronic tag of railroad train.

Background technology

ATIS is the basis of automatic data collection in the transportation by railroad infosystem, read-only passive electronic label is installed by this system on all vehicles of railway, on locomotive, install can wired rewriting active label, gateway at all marshalling yards of railway, district station, large freight delivery stations, and mouthful installation ground identification equipment of demarcating between boundary mouth, railroad suboffice between Railway Bureau, set up train, train number information automation collection reporter, realize tracking and managing train, vehicle, locomotive.What the electronic tag of utilization adopted at present is FSK (frequency shiftkeying frequency-shift keying coding) technology, coding/decoding and correction process for ease of label data, the max. speed that its technical standard order FSK code tag is suitable for is per hour 80 miles, about 128Km/h, because mounting condition complexity, can't satisfy the required installing environmental conditions of electronic tag operate as normal, can not reliably be identified so be applied in the electronic tag of the above hot-short of 260Km/h, cause discrimination not reach the requirement of operation management all the time.Along with train constantly raises speed, must develop the speed of a motor vehicle is the bullet train electronic tag of 300Km/h, to adapt to the constantly needs of speed-raising of Chinese Railway.

Summary of the invention

The purpose of this utility model provides a kind of bullet train electronic tag, and the technical matters that solve is to improve the discrimination of train electronic tag, adapts to the needs that train is run at high speed.

The utility model is by the following technical solutions: a kind of bullet train electronic tag, have antenna, power source conversion data modulation circuitry, the tag data process module that is linked in sequence and write inlet, described tag data process module comprises quarter-phase (FMO) scrambler and storage double phase encoding result's storer, and first field effect transistor that the signal that scrambler produces is used through amplitude modulation, coupling mechanism are to antenna.

Power source conversion data modulation circuitry of the present utility model comprises first filtering circuit, diode peak detector, second filtering circuit, level Four amplifying circuit and the binary counter that is linked in sequence, the intermediate-freuqncy signal that generates inputs to long line transmitter, export again chip selection signal, clock signal through hex inverter, bus driver to scrambler.

The inlet of writing of the present utility model connects the label programmable device.

Scrambler of the present utility model adopts XT9005, storer adopts 24C256, first field effect transistor adopts BFR92, diode peak detector adopts ISS237, amplifier in the level Four amplifying circuit adopts AD8022, binary counter adopts MC54ACT163D, and long line transmitter adopts MAX485, and bus driver adopts MC74HC368.

The utility model compared with prior art, the tag data process module comprises FMO scrambler and storer, the first field effect transistor coupling mechanism and antenna that the emission of coding is used by the scrambler that is linked in sequence, amplitude modulation are finished, the speed that realizes data transmission by the FMO coded system increases, improve the discrimination of train label, thereby reached the purpose that adapts to bullet train.

Description of drawings

Fig. 1 is the work synoptic diagram of the utility model embodiment.

Fig. 2 is used new data coding of the utility model and legacy data coding contrast figure.

Fig. 3 is the circuit block diagram of the utility model embodiment.

Fig. 4 is the circuit theory diagrams of the utility model embodiment.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.As shown in Figure 1, when ground automatic equipment identification AEI (Automatic EquipmentIdentification) detects the signal of train arrival, start microwave launcher, launch microwave by the antenna that is loaded between rail, when being loaded on the electronic tag process antenna of train bottom, label is activated by microwave energy, and with the detailed amplitude modulation of the data in label reflected back ground automatic equipment identification AEI to the microwave, ground automatic equipment identification AEI again by demodulation, that decoding obtains label is detailed.

As shown in Figure 2, the form of FSK coding: each logical bit " 1 " or " 0 " take the physical signalling position of 8 40KHz, and information bit speed is 10kbps.FMO[frequency modulation O (frequency modulation is 0) double phase encoding, generally claim at home: quarter-phase (bi-phase space) coding] the form bit rate of coding: each logical bit " 1 " or " 0 " take the physical signalling position of 2 40KHz, and information bit speed is 40kbps.

As shown in Figure 3, bullet train electronic tag of the present utility model partly is linked in sequence by four and forms: antenna part, power source conversion data modulation circuitry, tag data process module and write inlet.Antenna part: be used to receive the microwave request signal of the readout device of automatic recognition of devices AEI to the electronic tag emission, antenna part sends the part of the microwave energy that receives to the power source conversion data modulation circuitry, the power source conversion data modulation circuitry converts direct current again to and gives tag-powered, another part microwave energy reflected back readout device that antenna part will receive, this part microwave energy also claims the microwave reflection signal, and the microwave reflection signal carries the data message that electronic tag stores.The power source conversion data modulation circuitry: the microwave request signal that antenna is received is converted to direct current to tag-powered, change with label license number data by antenna load impedance, the license number data-modulated that the label data module is sent here is finished the data-modulated to the microwave reflection signal to the carrier wave of reflection.The tag data process module: the tag data process module is made up of special chip and storer, storer has the license number data message of FMO coded format, special chip is finished reading and dealing with the work of storage license number data, and the license number data message of handling is sent to the power source conversion data modulation circuitry.Write inlet: write inlet and connect the label programmable device, be used to write the license number data message of FMO coded format.

As shown in Figure 4, the power source conversion data modulation circuitry of bullet train electronic tag of the present utility model is that level Four amplifying circuit and the binary counter MC54ACT163D of AD8022 constitutes by first filtering circuit that is linked in sequence, diode peak detector ISS237, second filtering circuit, amplifier, the intermediate-freuqncy signal that generates inputs to long line transmitter MAX485, exports chip selection signal, clock signal again through hex inverter, bus driver MC74HC368 to FMO scrambler XT9005; The tag data process module comprises FMO scrambler XT9005 and storer 24C256, the first field effect transistor BFR92, coupling mechanism and antenna that the emission of coding is used by the FMO scrambler XT9005, the amplitude modulation that are linked in sequence are finished, and the FMO coding result deposits storer 24C256 in.

The FMO coding of bullet train electronic tag of the present utility model is achieved as follows: passenger vehicle label 1 frame data take 128 information bits altogether.The composition of FMO-104 frame must comprise following three parts: 8 of frame heads, 104 of information bits, 16 of verifications

Flag of frame: 0101000110110001

Check bit: CRC16 verification

Polynomial expression adopts: X^16+X^12+X^5+1

Reset values: 0XFFFF

Transmission mode: anti-phase, most significant digit is sent out earlier

The FSK coding sees Table 1 with the contrast of FM0-104 coding

The FMO coding of bullet train electronic tag, i.e. 8bit frame head+104bit information+16bit verification.For the 120bit information bit boil down to 104bit information bit with former FSK coding, the method for compression method and position is as follows:

License number and the changing position of growing tall is represented by the 4-bit ASCII character, only keeps low 4 bit positions, and so just to license number with change the position of growing tall and limit: license number can only be made up of digital 0-9 with changing to grow tall.

X＝X & 0x0F

When from label, reading data, again with license number with change the bit recovery that grows tall and become to use the 6-bitASCII representation, whole information bit is returned to 120bit.

X＝X+0x10

The utility model is to be contained in passenger vehicle railway carriage bottom, when train when being loaded on the ground identification equipment antenna on the rail, the utility model label is activated, data message in the label is modulated by ASK, and reflected back ground identification equipment, obtain label data through demodulation, the emitting antenna main lobe width of ground identification equipment is 120 degree at present, exceed this scope, it is weak that the energy of aerial radiation becomes, can not guarantee to activate label, after in fact label was determined apart from the distance H of antenna, the horizontal coverage that label can be identified had just been determined.

Because the main lobe angle of ground identification equipment antenna is 120 degree, label is from the distance H=0.7m～1m. of identification equipment antenna, and label in the effective reading distance of train during by antenna is:

2L＝2×H×tg60°＝2×(0.7～1)×1.732＝2.42(m)～3.4(m)

Label is in the reach of read area and the relation of the speed of a motor vehicle.If train speed is V, the time that label can effectively transmit data is T.

Label during by AEI label can effectively transmit the time of data and the relation of the speed of a motor vehicle is calculated as follows:

$T=\frac{2L}{V}$

If the V=300 of train speed kilometer/hour, the time of label kilometer/hour energy effective reading: T=24ms～40ms then in vehicle velocity V=300, the label of FMO coding can by AEI effectively the number of identification have: (24～40)/3.2 ≈ 7～12 (frame).

If not necessarily from frame head, and FMO encodes that AEI can recognition data have 6 frames at least when undisturbed to label when entering active zone, so the utility model can satisfy the identification needs of bullet train fully.

Table 1 FSK coding and the contrast of FMO-104 coding

The section name	The FSK coding		The FMO-104 coding
					The position sequence number	Figure place	The position sequence number	Figure place
	Flag of frame	0-1	2	0-7					8(0101000110110001)
Attribute code					2-7	6	8-13	6
	Car type	8-13	6	14-19					6
Vehicle					14-43	30	20-49	30
	License number	44-61	18	50-77					28
Check bit					62-63	2	--
	Filler	64-65	2	--
License number					66-89	24
	Change length	90-101	12	78-87					10
Manufacturing plant					102-107	6	88-93	6
	Build date	108-125	18	94-111					18
Check bit					126-127	2	112-127	16

Claims (4)

1. bullet train electronic tag, have antenna, power source conversion data modulation circuitry, the tag data process module that is linked in sequence and write inlet, it is characterized in that: described tag data process module comprises quarter-phase (FMO) scrambler and storage double phase encoding result's storer, and first field effect transistor that the signal that scrambler produces is used through amplitude modulation, coupling mechanism are to antenna.

2. bullet train electronic tag according to claim 1, it is characterized in that: described power source conversion data modulation circuitry comprises first filtering circuit, diode peak detector, second filtering circuit, level Four amplifying circuit and the binary counter that is linked in sequence, the intermediate-freuqncy signal that generates inputs to long line transmitter, export again chip selection signal, clock signal through hex inverter, bus driver to scrambler.

3. bullet train electronic tag according to claim 2 is characterized in that: the said write mouth connects the label programmable device.

4. bullet train electronic tag according to claim 3, it is characterized in that: described scrambler adopts XT9005, storer adopts 24C256, first field effect transistor adopts BFR92, diode peak detector adopts ISS237, and the amplifier in the level Four amplifying circuit adopts AD8022, and binary counter adopts MC54ACT163D, long line transmitter adopts MAX485, and bus driver adopts MC74HC368.

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