CN101025849A - Data communication and positioning-speed-measuring combined system based on asymmetic structure inductive loop - Google Patents

Abstract

The invention discloses a data communication and position detection composite system based on asymmetric structure induction ring, which includes terrestrial communication and position detection units, automotive communication and position detection units, cables laid on the center of tracks, transmitting antennas, receiving antennas and position detection antennas that are installed facing the cable between tracks under vehicle body. The terrestrial communication and positioning detection unit connects the cable between tracks, and the automotive communication and positioning unit respectively connects the transmitting antenna, receiving antenna and position detection antenna. The cable between tracks includes the first and second cable, the first cable is laid vertically along the track center, the second cable crosses with the first one at a certain distance interval, and the first one is set curved section on each crossing.

Description

Data communication and positioning-speed-measuring compound system based on the dissymmetrical structure induction loop

Technical field

The present invention is mainly concerned with data communication and positioning-speed-measuring complex technique field, refers in particular to a kind of data communication and positioning-speed-measuring compound system based on the dissymmetrical structure induction loop.

Background technology

At present, in track traffic, how car is positioned and tests the speed, how to solve simultaneously car, between communication become the key issue that will solve in the track traffic technology.With the magnetic suspension train is example, in order to guarantee the normal operation of magnetic-levitation train, must design communication and the positioning speed-measuring system that satisfies the magnetic-levitation train service requirement.For common wheel rail railway, mainly realize train-ground communication by track circuit, positioning-speed-measuring and communication system architecture are too complicated.And magnetic-levitation train does not have wheel, do not contact between vehicle and the track during operation, so the train-ground communication of magnetic-levitation train can not continue to use the method for traditional railway, must study the communication means that makes new advances.In the prior art, induction loop communication is a kind of communication mode that can satisfy magnetic-levitation train needs, reliability height, economic environmental protection.And cross the point of crossing number of times of induction loop by measuring antenna, can realize the positioning-speed-measuring of train.

Traditional induction loop implementation mainly contains three kinds, is respectively: parallel long lead induction loop mode, cross-inductive loop wire mode, improved cross-inductive loop wire mode.Parallel long lead induction loop mode is not carried out anti-interference process on line construction, so entire system is vulnerable to the outside electromagnetic interference influence, antijamming capability is relatively poor, especially is unfavorable for long distance applications.Cross-inductive loop wire mode has reduced external interference to a certain extent, but there is communication blind district in system, must adopt a plurality of antenna alternations could realize continuous communiction.A plurality of antennas have increased the complexity of system, and antenna is easy to make communication to make mistakes when switching.Improved cross-inductive loop wire mode adopts the signal phase shift system to eliminate the communication dead band, but because it has carried out the phase shift operation to transmission and received signal, further increased the complicacy of system, and phase shift operation makes and sneaked into the phase shift noise in the useful signal, reduced the reliability of communication.

Summary of the invention

The technical problem to be solved in the present invention just is: the invention provides a kind of simple in structure, train communication and positioning-speed-measuring are carried out simultaneously, be independent of each other, reduce simultaneously the external electromagnetic radiation to the influence of system, improve the data communication and the positioning-speed-measuring compound system based on the dissymmetrical structure induction loop of the reliability and stability of communication system.

For solving the problems of the technologies described above, the solution that the present invention proposes is: a kind of data communication and positioning-speed-measuring compound system based on the dissymmetrical structure induction loop, it is characterized in that: it comprises ground communication and positioning-speed-measuring unit, vehicle-carrying communication and positioning-speed-measuring unit, be layed in the rail cable of track centre and be installed on the emitting antenna of car body below respectively over against the rail cable place, receiving antenna and positioning-speed-measuring antenna, described ground communication links to each other with rail cable with the positioning-speed-measuring unit, vehicle-carrying communication and positioning-speed-measuring unit respectively with emitting antenna, receiving antenna links to each other with the positioning-speed-measuring antenna, described rail cable comprises first cable and second cable, first cable is vertically laid along orbit centre, second cable intersects once at a certain distance with first cable, is provided with bending segment in each infall first cable.

The emitting antenna coil of described emitting antenna and the receiving antenna coil of receiving antenna are the figure of eight.

Described emitting antenna coil links to each other with a series connection resonant element, and this series resonance unit comprises the capacitor C that is connected in series _O1And resistance R ₀₁

Described receiving antenna coil links to each other with a resonant element in parallel, and this parallel resonance unit comprises the capacitor C that is connected in parallel _I1And resistance R _I1

Described positioning-speed-measuring antenna lies in a horizontal plane in the top of track cable, is positioned at track centerline one side, and the positioning-speed-measuring aerial coil of positioning-speed-measuring antenna is rectangle.

Described positioning-speed-measuring aerial coil links to each other with a resonant element in parallel, and this parallel resonance unit comprises the capacitor C that is connected in parallel _I2And resistance R _I2

Described ground communication and positioning-speed-measuring unit comprise first master controller, the first communications transmit unit, the first communications reception unit, the Signal Spacing unit, positioning-speed-measuring signal transmitter unit, first power amplifier unit and second power amplifier unit, the first communications transmit unit links to each other with the signal input interface of first power amplifier unit with second power amplifier unit respectively with positioning-speed-measuring signal transmitter unit, the output interface of first power amplifier unit and second power amplifier unit links to each other with rail cable, the first communications reception unit links to each other with the output interface of Signal Spacing unit, the input interface of Signal Spacing unit links to each other with rail cable, the input interface of the first communications transmit unit, the input interface of the output interface of the first communications reception unit and positioning-speed-measuring signal transmitter unit links to each other with the corresponding interface of first controller respectively.

Described vehicle-carrying communication and positioning-speed-measuring unit comprise second master controller, the second communication transmitter unit, the 3rd power amplifier unit, second communication receiving element and positioning-speed-measuring signal receiving unit, the second communication transmitter unit links to each other with the communications transmit antenna by the 3rd power amplifier unit, the input interface of second communication receiving element links to each other with receiving antenna, the input interface of positioning-speed-measuring signal receiving unit links to each other with the positioning-speed-measuring antenna, the input interface of second communication transmitter unit, the input interface of the output interface of second communication receiving element and positioning-speed-measuring signal receiving unit links to each other with the corresponding interface of second master controller respectively.

Compared with prior art, advantage of the present invention just is: of the present invention based on the dissymmetrical structure induction loop data communication and the positioning-speed-measuring compound system is simple in structure, integrated level is high, can finish the function of track train data communication and positioning-speed-measuring simultaneously, utilize the dissymmetrical structure induction loop among the present invention can reduce the influence of external electromagnetic radiation to system, improve the reliability of communication system, eliminated communication blind district simultaneously, avoided the phase shift operation, can not add noise signal of communication.System of the present invention is subjected to train-side less to the influence of vibrations and height change, can be applied to abominable environment.System of the present invention need not to carry out switching and the signal phase shift between different antennae, historical facts or anecdotes is existing fairly simple, be adapted at more using on the magnetic-levitation train than traditional induction loop communication system, its system's positioning-speed-measuring precision equals rail cable point of crossing spacing, can satisfy the driving demand.

Description of drawings

Fig. 1 is the framework synoptic diagram of general structure of the present invention;

Fig. 2 is the structural representation of rail cable;

Fig. 3 is the structure for amplifying synoptic diagram at I place among Fig. 2;

Fig. 4 is the structural representation of emitting antenna;

Fig. 5 is the plan structure synoptic diagram of emitting antenna coil;

Fig. 6 is the structural representation of receiving antenna;

Fig. 7 is the plan structure synoptic diagram of receiving antenna coil among Fig. 6;

Fig. 8 is the structural representation of positioning-speed-measuring antenna;

Fig. 9 is the structural representation of positioning-speed-measuring aerial coil among Fig. 8;

Figure 10 is the framed structure synoptic diagram of ground communication and positioning-speed-measuring unit;

Figure 11 is the framed structure synoptic diagram of vehicle-carrying communication and positioning-speed-measuring unit;

Figure 12 is the analog signal interface circuit theory synoptic diagram of ground communication transmitter unit in the specific embodiment, ground communication receiving element, vehicle-carrying communication transmitter unit, vehicle-carrying communication receiving element;

Figure 13 is the test the speed circuit theory synoptic diagram of receiving element of vehicle positioning in the specific embodiment;

Figure 14 is that synoptic diagram is analyzed in long straight conductor and square coil mutual inductance;

Figure 15 is and the effect synoptic diagram of track vertical component loop line cable to antenna;

Figure 16 is and the effect synoptic diagram of parallel track part loop line cable to antenna;

Figure 17 is that mutual inductance changes synoptic diagram with antenna height;

Figure 18 is the synoptic diagram of antenna disalignment;

Figure 19 be antenna when being in different spatial and between loop line cable mutual inductance change synoptic diagram;

Figure 20 is that antenna is in position a hour offset distance and mutual inductance relation curve synoptic diagram;

Mutual inductance change curve synoptic diagram when Figure 21 is antenna forward migration 1cm orbital motion.

Marginal data

1, rail cable 11, first cable

12, second cable 13, bending segment

2, communications transmit antenna 21, communications transmit aerial coil

22, series resonance unit 3, communications reception antenna

31, communications reception aerial coil 32, parallel resonance unit

4, positioning-speed-measuring antenna 41, positioning-speed-measuring aerial coil

5, ground communication and positioning-speed-measuring unit 42, parallel resonance unit

51, first master controller 52, the first communications transmit unit

53, the first communications reception unit 54, positioning-speed-measuring signal transmitter unit

55, first power amplifier unit 56, second power amplifier unit

57, Signal Spacing unit 6, vehicle-carrying communication and positioning-speed-measuring unit

61, second master controller 62, second communication transmitter unit

63, second communication receiving element 64, positioning-speed-measuring signal receiving unit

65, the 3rd power amplifier unit

Embodiment

Below with reference to the drawings and specific embodiments the present invention is described in further details.

Referring to Fig. 1, Fig. 2 and shown in Figure 3, a kind of data communication and positioning-speed-measuring compound system of the present invention based on the dissymmetrical structure induction loop, it comprises ground communication and positioning-speed-measuring unit 5, vehicle-carrying communication and positioning-speed-measuring unit 6, be layed in the rail cable 1 of track centre and be installed on the emitting antenna 2 of car body below respectively over against rail cable 1 place, receiving antenna 3 and positioning-speed-measuring antenna 4, ground communication links to each other with rail cable 1 with positioning-speed-measuring unit 5, vehicle-carrying communication and positioning-speed-measuring unit 6 respectively with emitting antenna 2, receiving antenna 3 links to each other with positioning-speed-measuring antenna 4, rail cable 1 comprises first cable 11 and second cable 12, first cable 11 is vertically laid along orbit centre, second cable 12 intersects once at a certain distance with first cable 11, is provided with bending segment 13 in each infall first cable 11.In the present embodiment, second cable 12 of end and the distance between first cable 11 are a, and second cable 12 intersects once every distance b with first cable 11.First cable 11 turns back at each infall and once forms bending segment 13, and the length of turning back is 2a, and bending segment 13 twists into twisted-pair feeder, and connects build-out resistor and matching capacitance in the cable termination place.

Referring to Fig. 4, Fig. 5, Fig. 6 and shown in Figure 7, the emitting antenna coil 21 of emitting antenna 2 and the receiving antenna coil 31 of receiving antenna 3 are the figure of eight.In the present embodiment, the coil width of figure of eight antenna and arranged on left and right sides is a, and antenna lies in a horizontal plane in directly over the rail cable.To send signal as far as possible greatly in order making, to require the electric current in the emitting antenna 2 big as far as possible, therefore adopt the series resonance mode to export, make antenna resonance in emission signal frequency.In the present embodiment, emitting antenna coil 21 links to each other with a series connection resonant element 22, and this series resonance unit 22 comprises the capacitor C that is connected in series _O1And resistance R ₀₁In order to make received signal big as far as possible, require the voltage in the receiving antenna 3 big as far as possible, therefore adopt the parallel resonance mode to import, make antenna resonance in the received signal frequency.In the present embodiment, receiving antenna coil 31 links to each other with a resonant element 32 in parallel, and this parallel resonance unit 32 comprises the capacitor C that is connected in parallel _I1And resistance R _I1

In order to analyze the communication characteristic of asymmetric formula induction loop, at first calculate the mutual inductance between unlimited long straight conductor and the square coil.As shown in figure 14, square coil is put in the xoy plane with rectangular coordinate system in space, and long limit is parallel with the y axle.The long L of coil, wide W=b-a, a, b are respectively the projections of two long limits at the x axle.Lead is in the yoz plane, and is parallel with the y axle, is projected as h on the z axle.Any 1 p (x, y, 0) is r to the distance of lead in the square coil _p, when feeding electric current I in the lead, the magnetic induction that p is ordered is

Be the tangential direction unit vector of circle coordinates,

Be respectively rectangular coordinate x, y, z direction unit vector.

Ignore skin effect of line, the Ampere circuit law of application can get:

So have:

$\left|{\stackrel{\&OverBar;}{B}}_p\right|=({\mathrm{\&mu;}}_{0}I+\frac{1}{{\mathrm{<figure-callout\; id="2"\; label="c"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">c</figure-callout>}}^2}{\&Integral;}_S\frac{\&PartialD;E}{\&PartialD;t}\&CenterDot;\mathrm{dS})/2\mathrm{\&pi;}{r}_p---\left(2\right)$

In desirable induction loop system, external electromagnetic field is constant, promptly $\frac{\&PartialD;E}{\&PartialD;t}=0.$ In actual applications, external electromagnetic field, has much smaller than the influence that current in wire produced the induction system influence at this moment usually:

Therefore can obtain:

${\stackrel{\&OverBar;}{B}}_p=\frac{I{\mathrm{\&mu;}}_0}{2\mathrm{\&pi;}{r}_p}\stackrel{\&RightArrow;}{\mathrm{\&alpha;}}=\frac{I{\mathrm{\&mu;}}_0}{2\mathrm{\&pi;}\sqrt{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+x^2}}(\frac{-\mathrm{<figure-callout\; id="2"\; label="h\; h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}{\sqrt{h^{}}}\stackrel{\&RightArrow;}{i}+\frac{-x}{\sqrt{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+x^2}}\stackrel{\&RightArrow;}{k})---\left(3\right)$

The coil flux ψ that is produced by straight lead is:

$\mathrm{\&psi;}=L{\&Integral;}_a^b\frac{-I{\mathrm{\&mu;}}_{0}x}{2\mathrm{\&pi;}({\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+x^2)}\mathrm{dx}$

$=\frac{-\mathrm{IL}{\mathrm{\&mu;}}_0}{4\mathrm{\&pi;}}\ln ({\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+x^2){|}_a^b$

$=\frac{-\mathrm{IL}{\mathrm{\&mu;}}_0}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+a^2}---\left(4\right)$

Perhaps also can be write as:

$\mathrm{\&psi;}=\frac{-\mathrm{IL}{\mathrm{\&mu;}}_0}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{(a+W)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+a^2}---\left(5\right)$

Negative sign represents that flow direction is opposite with the z direction of principal axis in the following formula.The signal transmission characteristics of dissymmetrical structure induction loop system is discussed below, at first the single turn antenna is analyzed.Calculate for simplifying, ignore the boundary effect of coil and lead.Direction according to loop line cable can be divided into two parts with it.At first analyze the effect of loop line cable and track vertical component to antenna.Discuss in two kinds of situation, as shown in figure 15:

In (a), cable is ψ to the magnetic flux that aerial coil A, B two parts produce ₁, ψ ₂According to formula (5), and make vertical paper, then have upward to for just:

${\mathrm{\&psi;}}_1={\mathrm{\&psi;}}_2=\frac{\mathrm{Ib}{\mathrm{\&mu;}}_0}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{(a+L)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+a^2}---\left(6\right)$

Equate the electromotive force equal and opposite in direction that vertical as can be known cable produces by two coil fluxs in them.Because two coils are to intersect to link to each other, the combined potential of antenna output is zero.

In (b), lead two parts close proximity in actual applications, is wound in twisted-pair feeder with them, so they are to almost not influence of antenna.Inoperative with track vertical component loop line cable as can be known by last surface analysis to whole communication process.The induced signal of antenna is to produce with the excitation of parallel track part loop line cable fully.Divide the effect of three kinds of situation analysis and parallel track part loop line cable to antenna.

Referring to shown in Figure 16, when antenna was in position (a), the magnetic flux in the aerial coil A was:

${\mathrm{\&psi;}}_1=\frac{\mathrm{IL\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}+\frac{-\mathrm{IL\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{\left(2b\right)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}---\left(7\right)$

The magnetic flux of aerial coil B is:

${\mathrm{\&psi;}}_2=\frac{-\mathrm{IL\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}+\frac{-\mathrm{IL\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}=\frac{-\mathrm{IL\&mu;}}{2\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{h^2}---\left(8\right)$

So the combined potential that antenna induction arrives should for:

$e\left(t\right)=e_1\left(t\right)-e_2\left(t\right)$

$=-\frac{d{\mathrm{\&psi;}}_1}{\mathrm{dt}}+\frac{d{\mathrm{\&psi;}}_2}{\mathrm{dt}}$

$=-(\frac{3\mathrm{L\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}+\frac{-\mathrm{L\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{\left(2b\right)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2})\frac{\mathrm{dI}}{\mathrm{dt}}---\left(9\right)$

When antenna was in last figure position (b), analytic process was the same.Antenna induction to combined potential be:

$e\left(t\right)=e_1\left(t\right)-e_2\left(t\right)$

$=-(\frac{3\mathrm{L\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}+\frac{-\mathrm{L\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{\left(2b\right)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2})\frac{\mathrm{dI}}{\mathrm{dt}}---\left(10\right)$

When antenna was in last figure position (c), the magnetic flux of aerial coil A was:

${\mathrm{\&psi;}}_1=\frac{\mathrm{IL\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}+\frac{\mathrm{<figure-callout\; id="1"\; label="I\; l"\; filenames="A20071003450900171.png,A20071003450900211.png"\; state="\{\{state\}\}">I</figure-callout>}{l}_{}{}_1\mathrm{\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}+\frac{-I(L-l_1)\mathrm{\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{\left(2b\right)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}---\left(11\right)$

The magnetic flux of aerial coil B is:

${\mathrm{\&psi;}}_2=\frac{-\mathrm{IL\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}+\frac{-I(L-l_1)\mathrm{\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}+\frac{\mathrm{<figure-callout\; id="1"\; label="I\; l"\; filenames="A20071003450900171.png,A20071003450900211.png"\; state="\{\{state\}\}">I</figure-callout>}{l}_{}{}_1\mathrm{\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{\left(2b\right)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}---\left(12\right)$

So the combined potential in the antenna should for:

$e\left(t\right)=e_1\left(t\right)-e_2\left(t\right)$

$=-\frac{d{\mathrm{\&psi;}}_1}{\mathrm{dt}}+\frac{d{\mathrm{\&psi;}}_2}{\mathrm{dt}}$

$=-(\frac{3\mathrm{L\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}+\frac{-\mathrm{L\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{\left(2b\right)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2})\frac{\mathrm{dI}}{\mathrm{dt}}---\left(13\right)$

The contrast three kinds of situations the result as can be known, when train did not have laterally offset, the induced potential in the antenna did not change with train position.Order

$M=\frac{3\mathrm{L\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}+\frac{-\mathrm{L\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{\left(2b\right)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}---\left(14\right)$

M is the mutual inductance between antenna and the induction cable, and wide when definite as the length of antenna, M is only with highly relevant.Make L=0.15m, b=0.15m, M and height change relation are as shown in figure 17;

If electric current is in the cable: I=Asin ω t, then single turn antenna internal induction electromotive force is:

e(t)＝-M·A·ω·cosωt (15)

The induced potential of n circle antenna is:

e(t)＝-n·M·A·ω·cosωt (16)

Top analysis explanation, communication blind district and undesire frequency have been eliminated by the induction loop system among the present invention.For giving fixed system, mutual inductance is a definite value between antenna and induction loop, and the induced signal that antenna receives is identical with the frequency and the phase place of exciting current in the loop line cable, and amplitude is a constant.That is to say that the communication channel based on the induction loop communication system is a constant-parameter channel; And the communication channel of various traditional induction loop communication systems all is a variable-parameter channel.These new features make to be simplified based on the communication system equipment of novel induction loop, and signal transmission fidelity and reliability are improved significantly.

In train travelling process, must also there be the vibration on other direction in the relative rail cable of antenna except having along the parallel motion of cable axis direction, and this vibration it seems it is inevitable as stochastic error.The single turn antenna is analyzed, and after the adding vibration interference, equation (15) is rewritten as:

$e\left(t\right)=-M\&CenterDot;A\&CenterDot;\mathrm{\&omega;}\&CenterDot;\cos \mathrm{\&omega;t}-A\&CenterDot;\sin \mathrm{\&omega;t}\&CenterDot;\frac{\mathrm{dM}}{\mathrm{dt}}$

$=-M\&CenterDot;A\&CenterDot;\mathrm{\&omega;}\&CenterDot;\cos \mathrm{\&omega;t}-A\&CenterDot;\sin \mathrm{\&omega;t}\&CenterDot;(\frac{\&PartialD;M}{\&PartialD;h}\frac{\mathrm{dh}}{\mathrm{dt}}+\frac{\&PartialD;M}{\&PartialD;b}\frac{\mathrm{db}}{\mathrm{dt}}+\frac{\&PartialD;M}{\&PartialD;L}\frac{\mathrm{dL}}{\mathrm{dt}})---\left(17\right)$

With formula (14) respectively to h, L, the μ differentiate gets:

$\frac{\&PartialD;M}{\&PartialD;h}=\frac{-6{\mathrm{<figure-callout\; id="4"\; label="b"\; filenames="A20071003450900171.png,A20071003450900211.png"\; state="\{\{state\}\}">b</figure-callout>}}^4\mathrm{hL\&mu;}}{\mathrm{\&pi;}{h}^2({\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2)({\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+4b^2)}---\left(18\right)$

$\frac{\&PartialD;M}{\&PartialD;b}=\frac{6{\mathrm{<figure-callout\; id="3"\; label="b"\; filenames="A20071003450900171.png,A20071003450900211.png"\; state="\{\{state\}\}">b</figure-callout>}}^3\mathrm{L\&mu;}}{\mathrm{\&pi;}({\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2)({\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+4b^2)}---\left(19\right)$

$\frac{\&PartialD;M}{\&PartialD;L}=\frac{3\mathrm{\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}+\frac{-\mathrm{\&mu;}}{4\mathrm{\&pi;}}\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{\left(2b\right)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+b^2}---\left(20\right)$

By formula (18), (19), (20) as can be seen

With the same order of magnitude of M, and

Depend on and train composition and running status, generally can be very not big.The communication carrier frequencies omega is chosen as tens kHz usually to hundreds of kHz, and then the interference of vibration generation is far smaller than carrier frequency ω.Therefore, back one is far smaller than lastly in the formula (17), and promptly vibration interference is compared useful signal and can be ignored.

May there be error in the installation site of the laying of loop line cable and train antenna, and following surface analysis antenna and loop line cable are out of position to the influence of system.When train antenna height h changed, the curve that mutual inductance M changes was thereupon as above schemed.With M ₀The mutual inductance of antenna and loop line cable during expression h=0.1m.When h variation ± 10%, when promptly going up lower deviation 1cm, the M variation range is [0.8581 M ₀, 1.1701 M ₀].For the induction loop communication system that adopts frequency modulation or pm mode, mutual inductance changes in above-mentioned scope and exerts an influence very little to communication.

Referring to shown in Figure 180, when skew takes place train antenna vertical track direction in surface level, respectively antenna is in diverse location analysis.

When antenna was in position a, mutual inductance was:

$M=\frac{\mathrm{L\&mu;}}{4\mathrm{\&pi;}}[2\mathrm{<figure-callout\; id="2"\; label="ln\; h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">ln</figure-callout>}\frac{h^{}}{}\frac{{}^2+{(b+x)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+x^2}+\mathrm{<figure-callout\; id="2"\; label="ln\; h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">ln</figure-callout>}\frac{h^{}}{}\frac{{}^2+{(b-2x)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+x^2}-\mathrm{<figure-callout\; id="2"\; label="ln\; h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">ln</figure-callout>}\frac{h^{}}{}\frac{{}^2+{(2b+x)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{(b+x)}^2}]---\left(21\right)$

When antenna was in position b, mutual inductance was:

$M=\frac{\mathrm{L\&mu;}}{4\mathrm{\&pi;}}[2\mathrm{<figure-callout\; id="2"\; label="ln\; h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">ln</figure-callout>}\frac{h^{}}{}\frac{{}^2+{(b-x)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+x^2}+\mathrm{<figure-callout\; id="2"\; label="ln\; h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">ln</figure-callout>}\frac{h^{}}{}\frac{{}^2+{(b+x)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+x^2}-\mathrm{<figure-callout\; id="2"\; label="ln\; h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">ln</figure-callout>}\frac{h^{}}{}\frac{{}^2+{(2b-x)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{(b-x)}^2}]---\left(22\right)$

When antenna was in position c, mutual inductance was:

$M=\frac{\mathrm{\&mu;}}{4\mathrm{\&pi;}}[(2L-l_1)\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{(b+x)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+x^2}+(L+l_1)\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{(b-x)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+x^2}$

$-(L-l_1)\ln \frac{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{(2b+x)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{(b+x)}^2}-{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="A20071003450900171.png,A20071003450900211.png"\; state="\{\{state\}\}">l</figure-callout>}}_1\mathrm{<figure-callout\; id="2"\; label="ln\; h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">ln</figure-callout>}\frac{h^{}}{}\frac{{}^2+{(2b-x)}^2}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A20071003450900171.png,A20071003450900181.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{(b-x)}^2}]---\left(23\right)$

As shown in figure 19, with matlab antenna that formula (21), formula (22), formula (23) the determine mutual inductance parameter when being in different spatial of drawing.As can be seen, antenna is during over against induction loop, and mutual inductance is a constant; During antenna off-center position, mutual inductance is cyclical variation.Negative offset and forward migration when being in position b when antenna is in position a, mutual inductance reduces the fastest.

Referring to shown in Figure 20, when providing antenna and being in position a, the relation of vertical track direction offset distance and mutual inductance.Referring to shown in Figure 21, when providing antenna forward migration 1cm orbital motion, antenna and loop line cable mutual inductance situation of change.Mutual inductance change be no more than peaked 10%, little to the frequency modulation communication influence.Analysis above comprehensive as can be known, when antenna changed among a small circle in the space, mutual inductance changed not quite between itself and loop line cable, and induced signal is that amplitude changes, and phase place and frequency remain unchanged, this influence for the frequency shift keying communication mode is very little.Therefore has good interference free performance on the dissymmetrical structure induction loop Systems Theory.

Referring to Fig. 8 and shown in Figure 9, positioning-speed-measuring antenna 4 lies in a horizontal plane in the top of track cable 1, is positioned at track centerline one side, and the positioning-speed-measuring aerial coil 41 of positioning-speed-measuring antenna 4 is rectangle, and in the present embodiment, its width is a.In order to make received signal big as far as possible, require the voltage in the positioning-speed-measuring antenna 4 big as far as possible, therefore adopt the parallel resonance mode to import, positioning-speed-measuring antenna 4 shunt capacitances and resistance make antenna resonance in the received signal frequency.In the present embodiment, positioning-speed-measuring aerial coil 41 links to each other with a resonant element 42 in parallel, and this parallel resonance unit 42 comprises the capacitor C that is connected in parallel _I1And resistance R _I1

Rail cable and antenna are set up electromagnetic model, and analyzing as can be known, the mutual inductance between the rail cable and antenna does not change with train operation.During therefore local surface launching signal, the induced signal that antenna receives is identical with the frequency and the phase place of exciting current in the rail cable, and amplitude is a constant.When antenna transmitted, exciting current frequency in the induced signal that the ground rail cable receives and the antenna, phase place were identical.That is to say that the communication channel based on novel induction loop communication system is a constant-parameter channel.This makes is simplified based on the communication system equipment of novel induction loop, and signal transmission fidelity and reliability are improved significantly.

Sinusoidal wave in the rail cable by stablizing, the every forward travel distance b of train (rail cable intersection spacing), the signal phase that positioning-speed-measuring antenna 4 receives changes 180 °.Vehicle-mounted address decoder can obtain the train relative position information by the phase change that detects signal in the antenna, again position signalling is done calculus of differences, just obtains train speed information.

Referring to Figure 10 and shown in Figure 12, in the present embodiment, ground communication and positioning-speed-measuring unit 5 comprise first master controller 51, the first communications transmit unit 52, the first communications reception unit 53, the first Signal Spacing unit 57, positioning-speed-measuring signal transmitter unit 54, first power amplifier unit 55 and second power amplifier unit 56, the first communications transmit unit 52 links to each other with the signal input interface of first power amplifier unit 55 and second power amplifier unit 56 respectively with positioning-speed-measuring signal transmitter unit 54, the output interface of first power amplifier unit 55 and second power amplifier unit 56 links to each other with rail cable 1, the first communications reception unit 53 links to each other with the output interface of signal isolation circuit 57, the input interface of Signal Spacing unit 57 links to each other with rail cable 1, the input interface of the first communications transmit unit 52, the input interface of the output interface of the first communications reception unit 53 and positioning-speed-measuring signal transmitter unit 54 links to each other with the corresponding interface of first master controller 51 respectively.In the present embodiment, first master controller 51 adopts the C8051F040 single-chip microcomputer, the first communications transmit unit 52 and the first communications reception unit 53 are realized by FSK modem chip ST7538 respectively, first power amplifier unit 55 and second power amplifier unit 56 adopt non-linear D class A amplifier A, positioning-speed-measuring signal transmitter unit 54 is made of MAX038 and interlock circuit, Signal Spacing unit 57 is by isolating transformer, and filtering circuit is formed.

Referring to Figure 11, Figure 12 and shown in Figure 13, in the present embodiment, vehicle-carrying communication and positioning-speed-measuring unit 6 comprise second master controller 61, second communication transmitter unit 62, the 3rd power amplifier unit 65, second communication receiving element 63 and positioning-speed-measuring signal receiving unit 64, second communication transmitter unit 62 links to each other with communications transmit antenna 2 by the 3rd power amplifier unit 65, the input interface of second communication receiving element 63 links to each other with receiving antenna 3, the input interface of positioning-speed-measuring signal receiving unit 64 links to each other with positioning-speed-measuring antenna 4, the input interface of second communication transmitter unit 62, the input interface of the output interface of second communication receiving element 63 and positioning-speed-measuring signal receiving unit 64 links to each other with the corresponding interface of second master controller 61 respectively.In the present embodiment, second master controller 61 adopts the C8051F040 single-chip microcomputer, second communication transmitter unit 62 and second communication receiving circuit 63 are realized by FSK modem chip ST7538, the 3rd power amplifier unit 65 adopts non-linear D class A amplifier A, positioning-speed-measuring signal receiving unit 64 is by filtering, amplifying circuit, multiplier, the magnetic hysteresis comparator circuit is formed.

As shown in figure 12, the signal of communication modulation and demodulation are realized by monolithic FSK modem chip ST7538.The analog signal interface of ST7538 mainly comprises RAI, ATOP1, ATOP2 pin, and wherein RAI is that simulating signal receives pin, it can receive-5.3V～+ effective simulating signal in the 5.3V scope.ATOP1 and ATOP2 are the simulating signal output pins, and output voltage range is-0.3V～12.3V that the two pins phase of output signal differs 180 °, can realize bridge-type output.

As shown in figure 13, positioning-speed-measuring signal receiving unit hardware configuration is according to the method design of introducing in the last joint, except comprising multiplier, low-pass filtering, hysteresis relatively outside be feeble signal because antenna receives, also must before entering multiplier, carry out filtering and amplification, here be divided into transformer isolation, two links are amplified in frequency-selecting.Multiplier adopts the AD734 chip to realize.Constitute the RC low-pass filter by operational amplifier, the back connects proportional amplifier and amplifies voltage and improve the circuit output performance.The hysteresis comparator circuit is to be realized by the Schmidt trigger that 555 timers and related peripheral circuit constitute.Output signal is the standard square wave, can directly output to host computer.

Claims (10)

1, a kind of data communication and positioning-speed-measuring compound system based on the dissymmetrical structure induction loop, it is characterized in that: it comprises ground communication and positioning-speed-measuring unit (5), vehicle-carrying communication and positioning-speed-measuring unit (6), be layed in the rail cable (1) of track centre and be installed on the emitting antenna (2) that the car body below is located over against rail cable (1) respectively, receiving antenna (3) and positioning-speed-measuring antenna (4), described ground communication links to each other with rail cable (1) with positioning-speed-measuring unit (5), vehicle-carrying communication and positioning-speed-measuring unit (6) respectively with emitting antenna (2), receiving antenna (3) links to each other with positioning-speed-measuring antenna (4), described rail cable (1) comprises first cable (11) and second cable (12), first cable (11) is vertically laid along orbit centre, second cable (12) intersects once at a certain distance with first cable (11), is provided with bending segment (13) in each infall first cable (11).

2, data communication and positioning-speed-measuring compound system based on the dissymmetrical structure induction loop according to claim 1 is characterized in that: the emitting antenna coil (21) of described emitting antenna (2) and the receiving antenna coil (31) of receiving antenna (3) are the figure of eight.

3, data communication and positioning-speed-measuring compound system based on the dissymmetrical structure induction loop according to claim 2, it is characterized in that: described emitting antenna coil (21) links to each other with a series connection resonant element (22), and this series resonance unit (22) comprises the electric capacity (C that is connected in series _O1) and resistance (R ₀₁).

4, data communication and positioning-speed-measuring compound system based on the dissymmetrical structure induction loop according to claim 2, it is characterized in that: described receiving antenna coil (31) links to each other with a resonant element in parallel (32), and this parallel resonance unit (32) comprises the electric capacity (C that is connected in parallel _I1) and resistance (R _I1).

5, according to claim 1 or 2 or 3 or 4 described data communication and positioning-speed-measuring compound systems based on the dissymmetrical structure induction loop, it is characterized in that: described positioning-speed-measuring antenna (4) lies in a horizontal plane in the top of track cable (1), be positioned at track centerline one side, the positioning-speed-measuring aerial coil (41) of positioning-speed-measuring antenna (4) is rectangle.

6, according to data communication and the positioning-speed-measuring compound system described in the claim 5 based on the dissymmetrical structure induction loop, it is characterized in that: described positioning-speed-measuring aerial coil (41) links to each other with a resonant element in parallel (42), and this parallel resonance unit (42) comprises the electric capacity (C that is connected in parallel _I2) and resistance (R _I2).

7, according to claim 1 or 2 or 3 or 4 described data communication and positioning-speed-measuring compound systems based on the dissymmetrical structure induction loop, it is characterized in that: described ground communication and positioning-speed-measuring unit (5) comprise first master controller (51), the first communications transmit unit (52), the first communications reception unit (53), Signal Spacing unit (57), positioning-speed-measuring signal transmitter unit (54), first power amplifier unit (55) and second power amplifier unit (56), the first communications transmit unit (52) links to each other with the signal input interface of first power amplifier unit (55) with second power amplifier unit (56) respectively with positioning-speed-measuring signal transmitter unit (54), the output interface of first power amplifier unit (55) and second power amplifier unit (56) links to each other with rail cable (1), the first communications reception unit (53) links to each other with the output interface of Signal Spacing unit (57), the input interface of Signal Spacing unit (57) links to each other with rail cable (1), the input interface of the first communications transmit unit (52), the input interface of the output interface of the first communications reception unit (53) and positioning-speed-measuring signal transmitter unit (54) links to each other with the corresponding interface of first controller (51) respectively.

8, data communication and positioning-speed-measuring compound system based on the dissymmetrical structure induction loop according to claim 6, it is characterized in that: described ground communication and positioning-speed-measuring unit (5) comprise first master controller (51), the first communications transmit unit (52), the first communications reception unit (53), Signal Spacing unit (57), positioning-speed-measuring signal transmitter unit (54), first power amplifier unit (55) and second power amplifier unit (56), the first communications transmit unit (52) links to each other with the signal input interface of first power amplifier unit (55) with second power amplifier unit (56) respectively with positioning-speed-measuring signal transmitter unit (54), the output interface of first power amplifier unit (55) and second power amplifier unit (56) links to each other with rail cable (1), the first communications reception unit (53) links to each other with the output interface of Signal Spacing unit (57), the input interface of Signal Spacing unit (57) links to each other with rail cable (1), the input interface of the first communications transmit unit (52), the input interface of the output interface of the first communications reception unit (53) and positioning-speed-measuring signal transmitter unit (54) links to each other with the corresponding interface of first controller (51) respectively.

9, according to claim 1 or 2 or 3 or 4 described data communication and positioning-speed-measuring compound systems based on the dissymmetrical structure induction loop, it is characterized in that: described vehicle-carrying communication and positioning-speed-measuring unit (6) comprise second master controller (61), second communication transmitter unit (62), the 3rd power amplifier unit (65), second communication receiving element (63) and positioning-speed-measuring signal receiving unit (64), second communication transmitter unit (62) links to each other with communications transmit antenna (2) by the 3rd power amplifier unit (65), the input interface of second communication receiving element (63) links to each other with receiving antenna (3), the input interface of positioning-speed-measuring signal receiving unit (64) links to each other with positioning-speed-measuring antenna (4), the input interface of second communication transmitter unit (62), the output interface of the output interface of second communication receiving element (63) and positioning-speed-measuring signal receiving unit (64) links to each other with the corresponding interface of second master controller (61) respectively.

10, data communication and positioning-speed-measuring compound system based on the dissymmetrical structure induction loop according to claim 8, it is characterized in that: described vehicle-carrying communication and positioning-speed-measuring unit (6) comprise second master controller (61), second communication transmitter unit (62), the 3rd power amplifier unit (65), second communication receiving element (63) and positioning-speed-measuring signal receiving unit (64), second communication transmitter unit (62) links to each other with communications transmit antenna (2) by the 3rd power amplifier unit (65), the input interface of second communication receiving element (63) links to each other with receiving antenna (3), the input interface of positioning-speed-measuring signal receiving unit (64) links to each other with positioning-speed-measuring antenna (4), the input interface of second communication transmitter unit (62), the input interface of the output interface of second communication receiving element (63) and positioning-speed-measuring signal receiving unit (64) links to each other with the corresponding interface of second master controller (61) respectively.

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