JPS6172400A - Vehicle type discriminator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3.1 Industrial Application Field The present invention relates to a device for determining the type of vehicle traveling on a predetermined running route. This invention relates to a vehicle type discriminating device that focuses on differences and uses an axle detector to discriminate between vehicle types.

3.2 Conventional technology and its drawbacks Conventionally, in order to determine the type of train on the ground side,
A device that outputs information indicating the car type was installed on the train, and the car type was determined by receiving the car type information from above the train on the ground side.

Therefore, in the past, in addition to installing a reception discrimination device on the ground, it was necessary to install special equipment on the vehicle, which had the disadvantage of increasing equipment costs.

3.3 Objects and Means of Achieving the Invention In view of the above points, the present invention has been developed to eliminate the need for installing a special hoe on the vehicle, and to install equipment of the same configuration on the ground for all vehicle types. It is an object of the present invention to provide a vehicle type discrimination device capable of discrimination.

In order to achieve the above object, the present invention uses an axle detector to measure the distance between axles or the time ratio between axles of a train,
This is compared with a pre-stored inter-axle distance or inter-axle time ratio for each vehicle type, and if they match, a vehicle type-specific signal corresponding to the stored value is output.

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.

3.4 Examples Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows the basic configuration of the present invention, showing an axle detector 1 that detects the axle of a train passing on a predetermined running route R and outputs an electric signal, and an output from the axle detector. An arithmetic circuit 2 calculates the ratio of the axle open time and the time between the axles of the passing vehicle based on the axle opening time and the time between the axles, or the speed of the axle and the axle passing time, and calculates the distance between the axles from the speed and the axle passing time, and all vehicle types. a memory circuit 3 that stores in advance the ratio of the axle open time to the time between the axles or the distance between the axles as a reference value; and a verification circuit that compares the actual measured value from the arithmetic circuit with the reference value from the memory circuit. It consists of 4.

FIG. 2 shows an example of the configuration of the arithmetic circuit 2 for determining the type of vehicle based on the time ratio of passing axles. This method is
It 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 differentiation circuit 5 for obtaining a differential signal from a detection signal from an 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 differentiation circuit. 7, and a register 8 that captures the contents of the counter each time the differential signal is input.
and a time ratio calculating circuit 9 which calculates the ratio of count values while each axle of the vehicle passes through the axle detector.

In this way, the counter 7 can be used for each of the axles W1 to W under the vehicle.
2 * ' 2~W3 + Passage time t between W3~W4
1. By sequentially measuring t2+j3, the arithmetic circuit 9 obtains the ratio (tl : t2 : t3) of the open time of each axle under the vehicle.

This inter-axle time ratio is compared with the inter-axle time ratio for each vehicle type stored in advance in the storage circuit 3 in the comparison 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 1A and 1B placed along the driving route.
This is an example. 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 includes a flip-flop 10 that is set by the output of the first axle detector 1A and reset by the output of the second axle detector 1B, and a flip-flop that sets and outputs the oscillation pulse of the oscillator 11. As shown in Figure 4, each axle wl, w2,
A counter 12 that measures the passing time 11.12 between the front and rear axle detectors, a distance memory 13 that stores in advance the installation distance 1o of the axle detector, and a passing time that is the actual measured value of the counter. a speed calculation circuit 14 that calculates the train speed V based on the detected distance of the distance memory; a flip-flop 15 that is set by the output of the second axle detector 1B and reset by the output of the first axle detector; A counter 16 counts oscillation pulses while the flip 70 knob is outputting a set, and measures the passing time [0] of the front and rear axles, and the passing speed V1. V2 and the inter-axis time from the counter 16 [
0, the distance between the front and rear axes 'L+'' 2 is 11
It has an inter-axle distance calculation circuit 17 that calculates.

With the above configuration, when the train T on the running route R advances, the arithmetic circuit 2B uses the counter 12 to cause the first axle W,
The train speed ■1 is obtained by the speed calculation circuit 14 using the formula, and the counter 16 calculates the first train speed t1.
The passing time 1o from the axle Wl to the second axle W2 is measured, and then the counter 12 obtains 2 as the passing time of the second axle W2, and the speed calculation circuit 14 similarly calculates the train speed v.
2 is obtained by the formula, At this stage, the axle distance calculation circuit 17 calculates the train speeds V1, V2 and the appropriate inter-axle time to1. : Based on the formula, the distance 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. The data in this register is then compared in the collation circuit 4 with inter-axle distance data stored in the storage circuit 3 for each vehicle type.

Table 1 shows the results of the inventor's research on the relationship between each vehicle type and the distance between axles.

Table 1 Relationship between axle distance and vehicle type Below, 13~J! 5 as well, as is clear from the same table, there are unique combinations of axle distances depending on the vehicle type. Therefore, if the combination of inter-axle distances is known, it is possible to determine the type of vehicle. It is clear that even if the combination of inter-axle distances in Table 1 is converted into a ratio of the axle detector passing time of each axle, there is a similar correspondence between the ratio and the vehicle type.

In this way, in the present invention, the axle open time ratio or inter-axle distance of each vehicle type is stored in the storage circuit 3, and the actual measured value is calculated based on this and the axle amount information input from the axle detector. This makes it possible to easily identify the car model by comparing the

3.5 Effects of the Invention As described above, according to the present invention, the axle open time ratio or the inter-axle distance is obtained based only on information from the axle detector installed on the ground, and this is stored in the standard memory circuit. Since the vehicle type is determined by comparing the values, there is no need for special equipment on the vehicle, and the same configuration of calculation circuit, memory circuit, and matching circuit is used for all vehicle types on the ground. It is possible to reduce equipment costs.

[Brief explanation of the drawing]

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)

[Claims] an axle detector; and an arithmetic circuit that obtains the ratio between the inter-axle time and the next inter-axle time of a vehicle traveling on the road on which the axle detector is installed based on the output thereof; An arithmetic circuit that obtains the speed and axle passing time, and calculates the inter-axle distance from the speed and the axle passing time, and a calculation circuit that calculates the axle-to-axle distance using the ratio of the axle-to-axle time and the next axle-to-axle time or the axle-to-axle distance, which differs depending on the vehicle type, as a reference value. It consists of a storage circuit in which stored information is stored, and a verification circuit that compares the actual measured value of the arithmetic circuit with a reference value of the storage circuit and outputs a predetermined vehicle type-specific signal in response to a matched reference value. Vehicle type identification device.