JPS63301167A - Train sensor - Google Patents

Abstract

PURPOSE:To make it possible to certainly detect train passing by attaching a atrain gage on the center section of the inside of a plate-like warped spring and fixing the spring to the bottom face of a rail with the warped face out so that said strain gage may detect rail deformation. CONSTITUTION:A strain gage 2 is attached on the center section of the inside of a plate-like spring 1 bent upperward and connected to a leader cable 5 through a lead wire 4, gage 3 for temperature compensation, and cable clamper 6. The spring 1 having such constitution mentioned above is arranged to the bottom face of a portion of a rail 8 between cross ties 13 and 13 and is fixed to the rail at both ends 9 with the warped face faced to the rail 8 using a hook fittings 10, fixtures 11, and attaching screws 12. The passing of a train deform the rail 8 resulting in the variation if the output of the strain gage 2. The captioned train sensor is structured so as to detect the pass of a train according to the output from the strain gage 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sensor for detecting trains.

Conventional technology Conventionally, in order to detect trains, trains were detected by electrically insulating both rails and using the fact that current flows between the rails through the wheels and axles when the train passes. Was.

Problems to be Solved by the Invention However, this method has problems in that the insulator between the rails is easily worn out (and power consumption is high).

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and provide a hanging train sensor that is easy to maintain, is not affected by the environment, and can reliably detect trains.

Means for Solving the Problems The train sensor of the present invention has a stray gauge attached to the center of the concave portion of a warped plate-shaped spring, and furthermore, both ends of this spring are inserted between the railroad ties with the warped surface facing upward. It is installed below the part.

When a working train passes, the rail deforms by a small amount due to its weight, which is detected by a stray gauge, and the train is detected.

Embodiment FIGS. 1A and 1B are a side view and a plan view, respectively, of an embodiment of the train sensor of the present invention.

In the figure, reference numeral 1 denotes a curved spring, and a strain gauge 2 is attached to the central portion of the spring on the concave side. 3 is a temperature compensation gauge, 4 is a conducting wire, 5 is a lead-out cable, 6 is a cable clamper, and 7 is a joint portion between the cable 5 and the conducting wire 4.

FIGS. 2(A) and 2(B) are a sectional view and a side view, respectively, showing the present embodiment attached to a rail.

In the figure, 8 is a rail, 9 is an end of the spring 1, and lO is a hook, which is combined with a presser metal 11 to fasten the end 9 of the spring 1 to the rail 8 with a mounting screw 12 as shown in the figure.

FIGS. 3A and 3B are a plan view and a side view, respectively, of the sensor attached to the rail.

In the figure, 8 is a rail, 13 is a sleeper, and the hook 10, the holding metal 11, and the mounting screw 12 are used to hold the spring 1 to which the strain gauge 2 is fixed so that its warped surface is on the rail 8 side. and install as shown in the diagram.

With this configuration, when a train wheel comes between the sleepers 13, 13, the rail 8 is deformed by the train's gunshot, so the output of the strain gauge 1 changes, thereby making it possible to detect the train.

Effects of the Invention As described above, the train sensor of the present invention uses a strain gauge to detect strain in the rail due to the weight of the train.
It is not affected by the external environment, and since it is installed under the rail, it can be easily reinstalled even if the rail is replaced.

[Brief explanation of the drawing]

Fig. 1(A) is a side view of one embodiment of the train sensor of the present invention, Fig. 1(B) is a plan view thereof, and Fig. 2(A) is a sectional view showing the state in which this embodiment is attached to a rail. , FIG. 3(B) is a side view thereof, FIG. 3(A) is a plan view of the rail to which this embodiment is attached, and FIG. 3(B) is a side view thereof. 1... Spring, 2... Strain gauge, 8... Rail, 9... Spring end, 1
0... Hook metal fitting, 11... Holding metal fitting, 12... Installation screw. Name of agent: Patent attorney Toshio Nakao and one other person...
If, ip 2-Strain gauge 8-Rail 1/-One presser metal fitting +2-Double joint illusion (A) (B) (A)
(B) Figure 3 [A] (B)

Claims (1)

[Claims] A stray gauge is attached to the center of the concave part of a plate-shaped spring that has been warped, and both ends of the spring are attached below the part between the sleepers of the rail with the warped side facing up, so that the rail will not be affected by the weight of the train as it passes. A train sensor characterized in that the deformation of the train is detected by the stray gauge.