JPH0323391B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a device for determining the type of vehicle traveling on a designated travel route. Specifically, this invention focuses on the fact that the distance between axles varies depending on the type of vehicle, and uses an axle detector to determine the type of vehicle. The present invention relates to a vehicle type identification device that performs the following functions.

[Prior art and its drawbacks]

Conventionally, in order to determine the car type of a train on the ground side, a device that outputs information indicating the car type is installed on the train, and the ground side receives the car type information from above the car to determine the car type. Ta. Therefore,
Conventionally, in addition to installing a reception discrimination device on the ground, it was necessary to install special equipment onboard the vehicle, which had the disadvantage of increasing equipment costs.

[Technical problem to be solved]

In view of the above points, the present invention provides a vehicle type identification device that does not require any special equipment on the vehicle, and is capable of identifying vehicle types by installing equipment on the ground that has the same configuration for all vehicle types. The purpose is to provide.

[Means to solve the problem]

In order to achieve the above object, the present invention uses an axle detector, and from the time when the preceding axle of successive axles of a running train is detected by the axle detector, the following axle is detected by the same axle detector. (hereinafter referred to as the inter-axle passing time) and the ratio of the sequentially measured inter-axle passing time (hereinafter referred to as the inter-axle passing time ratio) or the distance between each axle of the train (hereinafter referred to as the inter-axle passing time ratio). This system measures the axle distance (referred to as the inter-axle distance), compares this with the pre-stored inter-axle passing time ratio or inter-axle distance for each vehicle type, and if they match, outputs a vehicle-specific signal corresponding to the stored value. This is how it was done. The axle detector may be of any known type, such as an electromagnetic type using transmitting and receiving coils installed on both sides of the rail, or an optical type using a light projector and a light receiver placed on both sides of the track.

[Effect]

With the above configuration, in the vehicle type discrimination device according to the first invention, the axle detector outputs a detection signal to the arithmetic circuit every time it detects each axle when the vehicle passes on the road where the axle detector is installed. . The arithmetic circuit sequentially measures each inter-axle passing time of the vehicle based on the detection signal, and obtains a ratio of the sequentially obtained inter-axle passing times. The verification circuit compares the inter-axle passing time ratio given by the arithmetic circuit with a reference value stored in the storage circuit, and outputs a predetermined vehicle type signal for the matched reference value. In addition, in the vehicle type discrimination device according to the second invention, when the axle detector provides a detection signal to the arithmetic circuit every time it detects an axle, the arithmetic circuit detects the speed of the axle of the vehicle passing on the road and the distance between the axles. The passing time is obtained, and the inter-axle distance is obtained from the speed and the inter-axle passing time, and this is provided to the verification circuit. The verification circuit compares the inter-axle distance, which is pre-stored in the storage circuit as a reference value and differs for each vehicle type, with the actual measured value of the arithmetic circuit, and determines the matched reference value by a predetermined vehicle type. Output a signal.

【Example】

Next, embodiments of the invention will be described based on the drawings. FIG. 1 shows the basic configuration of the present invention, in which the axles of a train T traveling on a predetermined running route R are shown.
An axle detector 1 that detects w ₁ , w ₂ , ... and outputs an electric signal, and an axle-to-axle passing time ratio of a passing vehicle based on the output from the axle detector, or an axle speed and an axle-to-axle passing time ratio. Arithmetic circuit 2 that calculates the time and calculates the inter-axle distance from these speeds and inter-axle passing time
and a memory circuit 3 that stores in advance the inter-axle passing time ratio or the inter-axle distance for all vehicle types as reference values.
and a verification circuit 4 that compares the measured value from the arithmetic circuit with the reference value from the storage circuit. FIG. 2 shows a specific example of the configuration of the arithmetic circuit 2 of the embodiment device which discriminates the vehicle type from the ratio of passing time between axles. This method is used when the train speed does not change at the location where the axle detector is installed, and only one axle detector is used. The arithmetic circuit 2A includes a differentiating circuit 5 for obtaining a differential signal from the detection signal from the axle detector, and a counter that counts pulses output from an oscillator 6 and is reset each time a differential signal is input from the differentiating circuit. 7, a register 8 that takes in the contents of the counter each time the differential signal is input, and a time ratio calculation circuit 9 that calculates the ratio of count values while each axle of the vehicle passes the axle detector. have. In this way, the counter 7 can be used for each axle of the vehicle T.
Transit time between w ₁ ~ w ₂ , w ₂ ~ w ₃ , w ₃ ~ w ₄ t ₁ , t ₂ ,
t ₃ is sequentially measured, and the arithmetic circuit 9 obtains the ratio (t ₁ :t ₂ :t ₃ ) of the transit time between each axle of the vehicle T. This inter-axle passing time ratio is compared with the inter-axle passing time ratio of each axle stored in advance in the storage circuit 3 in the matching circuit 4. If there is a reference value in the storage circuit that matches the actual measurement value from the arithmetic circuit, the vehicle type-specific signal stored together with the reference value is output from the verification circuit 4 in the form of a code. Figure 3 shows two axle detectors installed along the road.
This is an example in which A and 1B are provided. This method is advantageous for highly accurate vehicle type discrimination when the train speed changes depending on the location where the axle detector is installed. In this case, the arithmetic circuit 2B is the first axle detector 1
A is set by the output of the second axle detector 1B.
Flip-flop 1 is reset by the output of
0 and the oscillation pulses of the oscillator 11 are counted while the flip-flop 10 is outputting the set output, and as shown in FIG. 4, each axle w ₁ , w ₂ . . . The time it took to pass
In other words, the counter 12 that measures the transit times t ₁ and t ₂
, a distance memory 13 that stores in advance the installation distance l ₀ of the axle detector, and a speed calculation circuit 14 that calculates the train speed v based on the passing time, which is the actual measurement value of the counter, and the installation distance of the distance memory. Then, the flip-flop 15 is set by the output of the second axle detector 1B and reset by the output of the first axle detector, and while the flip-flop is set and outputting, the oscillation pulses are counted and the passing of the front and rear axles is detected. A counter 16 for measuring time _t0 , and a passing speed at each axle from the speed calculation circuit 14.
It has an inter _- axle distance calculation circuit 17 that calculates the distance l ₁ between the front and rear axles w ₁ and w 2 based on v ₁ and v ₂ and the inter-axle time t ₀ from the counter 16. With the above configuration, when the train T on the running route R advances, the calculation circuit 2B obtains the passing time t ₁ of the first axle w ₁ by the counter 12, and calculates the train speed v ₁ by the speed calculation circuit 14. is obtained by the formula v ₁ =l ₀ /t ₁・1/3.6 [Km/h], and the counter 16 calculates the first axle
Measure the passing time t ₀ from w ₁ to the second axle w ₂ ,
Next, the counter 12 obtains the transit time t ₂ of the second axle w ₂ , and similarly the speed calculation circuit 14 calculates the train speed v ₂ using the formula: v ₂ =l ₀ /t ₂・1/3.6 [Km/ h]. Then, at this stage, _the axle distance calculation circuit 17 calculates the formula _{l 1 = 3.6} /(v ₁ +v ₂ /2)·t ₀ [m ] The inter-axle distance l ₁ between the first axle and the second axle of the train is calculated. The calculation results are stored in the register 18 for each vehicle. and,
The data in this register is sent to the collation circuit 4,
It is compared with inter-axle distance data stored in the storage circuit 3 for each vehicle type. Table 1 in the next section shows the results obtained by the inventor's investigation of the relationship between each vehicle type and the distance between axles. As is clear from the table, there are unique combinations of axle distances depending on the vehicle type. Therefore, if the combination of inter-axle distances is known, the type of vehicle can be determined. Even if the combination of each axle distance in Table 1 is converted into a ratio of inter-axle passing time, the ratio is

[Table] It is clear that there is a similar correspondence between vehicle types. In this way, in the present invention, the inter-axle passing time ratio or the inter-axle distance of each vehicle type is stored in the storage circuit 3, and the actual measurement is calculated based on this and the inter-axle information input from the axle detector. This makes it possible to easily identify the car model by comparing the values.

【Effect of the invention】

As described above, according to the present invention, the inter-axle passing time ratio or the inter-axle distance is obtained based only on the information from the axle detector installed on the ground, and this is compared with the standard value in the memory circuit. Because the vehicle type is determined, there is no need for special equipment on the vehicle, and on the ground, the same configuration of arithmetic circuit, memory circuit, and verification circuit can be used for all vehicle types, and equipment Cost can be reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the basic configuration of the present invention, FIG. 2 is a block diagram mainly showing a specific example of an arithmetic circuit in one embodiment, and FIG. 3 is a block diagram mainly showing a specific example of an arithmetic circuit in another embodiment. FIG. 4 is a block diagram showing the configuration and a time chart showing the relationship between vehicle progress and axle passing time.

Claims (1)

[Scope of Claims] 1. An axle detector, and based on the output of the axle detector, sequentially measures the passing time between each axle of a vehicle traveling on a running road where the axle detector is installed, and an arithmetic circuit that obtains the transit time ratio; a memory circuit that stores inter-axle transit time ratios that differ for each vehicle type as reference values; and a comparison between the actual measurement value of the arithmetic circuit and the reference value of the memory circuit; A vehicle type discrimination device comprising a verification circuit that outputs a predetermined vehicle type-specific signal in response to matched reference values. 2 Obtain the axle speed and axle-to-axle passing time of a vehicle traveling on the road where the axle detector is installed based on the axle detector and the output of the axle detector, and from that speed and the axle-to-axle passing time. An arithmetic circuit that obtains the inter-axle distance, and a memory circuit that stores in advance the inter-axle distance that differs for each vehicle type as a reference value, compares the actual measured value of the arithmetic circuit with the reference value of the memory circuit, and determines whether the axle distance matches the standard. A vehicle type discrimination device comprising a verification circuit that outputs a predetermined vehicle type-specific signal in response to a value.