JPS58177765A - Method of detecting length of coupling of car - 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 The present invention relates to a vehicle formation growth detection method that combines a digital detection method and an analog detection method, which will be described later, and compares the detection results of both methods to determine the length of a train formation relative to a set length. be.

In railway equipment, it is often necessary to detect the growth of multiple vehicles. For example, if a train enters a station platform that is shorter than the length of the train, and the exit door is opened and collapsed, there is a risk that passengers will fall onto a place where there is no platform, or there will be an inconvenience that they will not be able to get off the train. Therefore, it is necessary to distinguish between trains with long lengths and those with short lengths, and to prevent trains that are longer than the platform length from opening the route to that platform. An object of the present invention is to automatically detect the length and shortness of a train set with high precision, and to prevent the above-mentioned dangers and inconveniences in advance.

As long as the types of vehicles to be assembled are the same, the growth in vehicle formation can be detected by counting the number of axles. Now, - vehicle length...t (constant), - vehicle axle number... W (- constant), counted axle number... n
The growth of one vehicle is expressed as L - %t.Therefore, a wheel detector that can count the number of axles is installed near the rail, and the number of wheels passing through this is counted. Growth can be detected. However, the wheel detector alone cannot determine whether the vehicle has passed or not. - Must be used in conjunction with other means capable of continuously detecting trains of a set while they are passing, such as track circuits, photodetectors, etc. Therefore, the growth of the train can be detected by counting the number of axles using the wheel detector and by detecting through a track circuit or the like that the train has passed the wheel detector installation position and terminating the counting. . This will be referred to here as a digital detection method.

On the other hand, as shown in FIG. 1, for example, vehicle detection means are provided at λ points A and B, which are separated by a distance Lc along the running route H of the train T, and which are separated by a distance Lc from which the length of the knitting growth is to be detected. When the train T arrives at point A, if train T is still detected at point B, the train length is greater than or equal to the set length Lc, and if it has not already been detected at point B, it is determined to be L(Lc. will be referred to here as the analog detection method.

The vehicle detection means is a short track circuit and a photodetector.

Any method such as ultrasonic vehicle sensing may be used.

The present invention uses one wheel detector and selects its installation position to detect vehicle knitting growth using both the digital detection method and analog detection method described above, and the detection results of both methods are consistent. Only when this happens, an output is generated to control the course of the vehicle, and if there is a discrepancy, an alarm is issued to the station staff 1, etc.

Embodiments to which the present invention is applied will be described below with reference to FIGS. 2 and 3. Figure 2 shows the existing track circuit section A for train detection such as blockers, interlocking devices, and level crossing safety equipment.
Seven wheel detectors WD are installed at positions separated from the boundary S between T and BT by a set length Lc for detecting the length of the train in the direction of travel indicated by the arrow of the train T, and in the section AT,
FIG. 3 is an explanatory diagram showing a state in which a digital method and an analog method are used together using BT track circuit conditions;
This figure is a circuit diagram for determining the growth of the vehicle in the case of FIG. 2. That is, the digital detection method in FIG.
This is a detection method in which the wheel detection wheel counts the wheels (axles) passing through its installation position, and the analog detection method is such that when the wheel detection wheel detects the leading wheel of the train T, the track circuit section BT still detects the vehicle. If so, the train commander L
≧set length Lc, and if the section BT is in a state where there is no vehicle, it is determined that the train length L<set length Lc.

Further, this detection method will be specifically explained using the circuit shown in Fig. 3. In the same figure, WD is the wheel detector shown in Fig. Ω, AC is an axle counter, DJ is a length determination circuit using a digital method,
Gl to G5 are ANDff”-), ATR and BTR are track relay ATR of track circuit section AT and BT, respectively.
, BTR (not shown) contacts indicated by the same symbol are change detection circuits, which detect that the track circuit section AT has changed from ``with'' a train to ``without'' a train. In the figure, the circuit shown in the upper part of the block indicated by the 7-dot chain line is the analog judgment block AB, and the circuit shown in the lower part is the digital judgment block DB. Further, OOMP is a comparison circuit that detects the coincidence of length determination by the analog detection method and the digital detection method.

Next, the operation of the circuit shown in FIG. 3 will be explained.

When the head of the train T arrives at the installation point of wheel detection intoxication and the first wheel detection pulse wp is input from the wheel detector WD to the circuit of FIG. G5 respectively. At this time, if the track relay BTR is restored and a vehicle is detected in the track circuit section BT, the restoration contact B is input in the analog judgment block AB.
The signal from the (+) power supply is output through the TR
2, an output is obtained to AND gate G2. Also, if no vehicle is detected in section BT, a signal from the (+) power supply is input to AND gate GI via operating contact BTR. Therefore, an output is obtained at the AND gate G1.

Each of the outputs is connected to an AND gate G3. Enter each in G4 and confirm) G3. Each output of G4 is held according to the configuration conditions and input to the comparison circuit COMP while the train T is in the track circuit section AT, that is, while the recovery contact ATR is configured.

Therefore, if the output is obtained at the AND gate G3,
It is determined that the train is shorter than the set value Lc. That is, if the judged train length in the analog judgment block AB is La, then in this case it is judged as La
is equal to the set length Lc but is longer, that is, La≧L
It is determined that c.

On the other hand, in the digital judgment block DB, the track circuit section A
While the presence of a train at T is detected, that is, while the track relay ATR is restored, the signal from the (+) power supply is input to the AND gate G5 via the restoration contact ATR, so the wheel Each time the detection pulse wp from the detector WD is input to the axle counter AC through the gate G5, the axle counter AC counts the pulse wp. When the train finishes passing through the section AT, the track relay ATR operates and its recovery contact is opened, so this is detected by the change detection circuit 4, and at this time, the digital judgment circuit DJ sets the set value Lc.
It is determined whether the train length Ld (where Ld is the determined train length in the digital determination block DB) is longer or shorter. As mentioned earlier, the axle count value n is r, d
Since there is a relationship of = 岱xz, the length can be determined by the digital determination circuit DJ. The output obtained here is input to the comparison circuit COMP, and when the judgment result obtained by the analog judgment block AB and the result obtained by the digital judgment block DB match, that is, La
=Ld, the train length L≧Lc1 or L(Lc is the final output. Also, when La x Ld, an alarm is output as a mismatch.

As described in the above embodiments, when detecting the vehicle length in an existing track circuit section, the wheel detector is
By simply installing a sensor and selecting its installation position, and by using a combination of digital and analog detection methods, it is possible to determine the validity of the axle count value. When a warning is issued, etc.
The present invention is extremely effective in detecting vehicle engine growth.

[Brief explanation of drawings]

FIG. 1 is an example diagram showing a comparison between vehicle knitting growth and the set length for detecting knitting growth, and FIG. 2 is a diagram illustrating a vehicle knitting using a track circuit section boundary and seven wheel detectors showing an embodiment of the present invention. FIG. 3 is a circuit diagram showing a specific example of implementing the method shown in FIG. 2. AT, BT: Track circuit section, S: Boundary, T8 train, W
D: Wheel detector, L: Vehicle growth, Lc: Settings ATR
, BTR: Track relay contact, AC1 axle counter, DJ
: Digital judgment circuit, MM: Change detection circuit, AB: Analog judgment block, DB: Digital judgment block,
cOMP: Comparison circuit. Patent applicant Rikichi Ichikawa, agent of Nippon Signal Co., Ltd.

Claims (1)

[Claims] A wheel detector is arranged at a distance of a required length from the border of adjacent track circuit sections of the railway track along the direction of travel of the vehicle, and when a wheel is detected at the arrangement point, the wheel detector is in contact with the boundary and the wheel detector means for determining whether or not a vehicle is detected in a track circuit section that does not include a wheel detector; 1. A method for detecting vehicle track growth, characterized in that the vehicle track growth is detected by a means for comparing the two determinations, in combination with a means for determining growth.