JPH02175379A - Device for warning approach of train - Google Patents

Abstract

PURPOSE:To surely notify of evacuation to a safe place by providing a detecting portion for detecting the approach of a train through the transmitting/receiving portions of a sound wave, transmitting a signal at the time of detecting the approach of the train and operating an alarm portion via a portable receiver carried by each way maintenance operators. CONSTITUTION:Sound waves are always transmitted in the direction of approaching trains from the sound wave transmitter 2 of a detecting portion 1 and, when a train approaches to, e.g., approx. 10-50m, the sound wave reflected by the foremost portion of the train 7 is received by a receiver 3 and its frequency is measured. The frequency f0 of a transmitted sound wave and the frequency (f) of a received sound wave are inputted into an operating/amplifying portion 4 to recognized the existence of the approaching train and the approaching speed thereof. The output signal of this operating/amplifying portion 4 is transmitted toward a way maintenance operation zone 6 to be received by the portable receivers 8 carried by each operator, operating an alarm portion provided on the receiver 8 to generate a train approach alarm for a defined time.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a warning device, and particularly to a train approach warning device for notifying track maintenance workers in a track maintenance work area of a train track of the approach of a train.

<Conventional technology> Track maintenance work such as rail replacement and roadbed improvement on train tracks is often carried out at night when the number of trains passing through the track maintenance work area is reduced. In order to notify the public, the safety of track maintenance work can be ensured by artificial means such as placing watchmen around the work area and having track maintenance workers evacuate to a safe place when a passing train approaches. I was planning.

<Problem to be solved by the invention> In general, the track maintenance work area is wide ranging from several hundred meters to one meter, and the number of personnel engaged in the track maintenance work is several tens of meters.
．． In addition, in places with poor visibility such as at night, there are conditions such as noise from the machines used for track maintenance work, so all track maintenance workers are notified of the approach of a passing train and moved to a safe place. Evacuation was a very difficult problem.

The present invention has been made to solve the above problems, and its purpose is to notify all workers engaged in track maintenance work in a track maintenance work area of the approach of a passing train, and to ensure that the workers To provide a train approach warning device that enables a person to evacuate to a safe place.

Means for Solving the Problems> The present invention has been made in view of the above object, and the gist thereof is to provide a sound wave transmitter placed at a predetermined distance M1 from the approaching direction of a train, and a sound wave transmitter that transmits sound waves from the transmitter. a train approach detection unit that includes a receiver that reflects and receives the sound waves detected by the approaching train; an operational amplifier unit that calculates and amplifies the signals detected by the detection unit; a transmitter that transmits the signal to a portable receiver carried by each worker in the track maintenance work area, and the portable receiver includes:
The present invention provides a train approach warning device including an alarm section configured to issue a train approach alarm based on a signal transmitted from the transmission section.

Further, the alarm unit according to the present invention may be configured to emit an alarm sound depending on the speed of the approaching train.

Another gist of the present invention is a sound wave transmitter installed at a predetermined distance from the approaching direction of the train, and a receiver that reflects the sound waves emitted from the transmitter to one approaching train and receives the waves. Train approach detection unit.

an operational amplification section that operationally amplifies the signal detected by the detection section;

A transmitting unit that transmits the signal amplified by the operational amplifier unit, a detecting unit, an operational amplifier unit, and a transmitting unit are set as one set, and each set is used to determine the approach direction of a train passing through each track of an up/down track, a double track, or a multiple track. Xf each! and a relay transmitting/receiving unit that receives individual signals transmitted from each of the transmitting units and transmits them to a portable receiver owned by a track maintenance worker,
The portable receiver includes a train approach warning device including an alarm unit configured to issue different train approach warnings for each of the up and down lines, double tracks, or double tracks based on individual signals transmitted from the relay transmitting/receiving unit. be.

Function> The detection unit and the operational amplification unit in the train approach warning device according to the present invention measure the speed of an approaching train using the Doppler effect.

This is done by generating a sound wave with a frequency fo with a sound wave transmitter, and measuring the frequency f of the reflected wave that is reflected back at the approaching train with a receiver, and the speed V of the approaching train is calculated.
is required. The speed of this train is transmitted to the track maintenance workers, and the approximation of this speed can be activated by changing the alarm depending on the various modes in the alarm section of the portable receiver that each worker has. This makes it possible to easily detect the approach of a train by keeping the distance between the train approach detector and each worker in the track maintenance work area of the train track constant. In addition, when track maintenance work is carried out on one train's upper and lower tracks, double tracks, or multiple tracks, in order to catch which direction the train is approaching, it is necessary to check these multiple trains using the train approach detection unit, operational amplification unit, It is also possible to arrange each set of transmitters for each of a plurality of program lines, and to transmit different signals to each worker through the relay transmitter/receiver.

<Example> Embodiments of the present invention will be described based on the accompanying drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, 1 is a detection section consisting of a sound wave transmitter 2 and a receiver 3. It is installed at a location to detect the presence or absence of an approaching train and its approaching speed.

The sound wave transmitter constantly emits sound waves in the direction of the approaching train, and when one train approaches, for example, from 1 to 50 meters, the receiver 3 detects the frequency of the sound wave reflected at the front of the train 7. Make sure to measure it. 4 is a sound wave transmitter 2
This is an operational amplification unit that calculates and amplifies the frequency fo of the sound waves generated by the receiver 3 and the frequency f of the sound waves detected by the receiver 3, and recognizes the presence or absence of an approaching train and its approaching speed. 5
is a transmitter that transmits the signal amplified by the operational amplifier 4 to each worker in the track maintenance work area 6 located a certain distance away from the signal. Reference numeral 8 denotes a portable receiver carried by each worker in the track maintenance work area 6. The receiver 8 receives the signal transmitted from the transmitter 5, and uses a timer set in advance before the track maintenance work. It is equipped with an alarm unit that continues to issue a train approach warning for a certain period of time. In addition,
The alarm sound emitted from the alarm unit can change the interval and intensity of the alarm sound depending on the speed of the approaching train.

A block diagram showing another embodiment of the present invention is shown in FIG.
In this embodiment, the detection section 1, the operational amplifier section 4, and the transmission section 9 are each installed near parallel lines such as up and down lines, double tracks, and double tracks of a train. FIG. 2 shows one of the plurality of installation locations.

In the figure, the method of detecting the presence or absence of a train approaching and the approaching speed using the detection section 1 and the operational amplifier section 4, and the specifications of the portable receiver 8 are the same as those of the previous embodiment, so the explanation will be omitted.

Reference numeral 9 denotes a transmitting section that transmits the signal amplified by the operational amplifier section 4, and a separate signal level or a separate frequency band is installed for each installation location. 10 receives each signal transmitted from each transmitter 9 from a different location, selects the received signal, and can transmit it according to the mode to a portable receiver 8 owned by any worker depending on settings. This is a relay transmitting/receiving section.

Effectiveness> As explained in detail above, the device of the present invention uses reflected waves of sound waves to determine the presence or absence of an approaching train, and sends the results to the portable receivers carried by each track maintenance worker. Since the system uses a method of transmitting alarm signals and activating the alarm sound, it is possible to reliably notify each worker of the approaching train compared to the conventional artificial method of having track maintenance workers evacuate based on instructions from a lookout. .

Further, since the warning sound can be activated according to the speed of the approaching train, the track maintenance worker can intuitively grasp the speed of the approaching train.

Furthermore, a set of the detection section, the operational amplifier section, and the transmission section is installed on parallel lines such as up and down lines, double tracks, and double tracks of one train, and receives different signals transmitted from each transmitting section, and receives the different signals transmitted from each transmitting section. By providing a relay transmitter/receiver that selects each received signal and transmits it to any portable receiver, it can be used as a train approach warning system even when the track maintenance work area is wide and there are many workers. Function effectively.

The device of the present invention can be applied not only to the railway industry, but also to ensuring the safety of people working within track areas in mining, forestry, and other industries, and can be expected to make a significant contribution to occupational safety.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a train approach warning device according to the present invention,
FIG. 2 is a schematic diagram of the entire device when a relay transceiver is provided and a plurality of detection sections, operational amplifier sections, and transmission sections are also arranged. 1. Detection unit, 2. Sound wave transmitter, 3. Receiver, 4.
- Operational amplifier section, 5... Transmission section, 6. Track maintenance work area, 7
...Train, 8...Portable receiver.

Claims (1)

[Claims] 1) A train equipped with a sound wave transmitter installed at a predetermined distance from the approaching direction of the train and a receiver that reflects the sound waves emitted from the transmitter to the approaching train and receives the waves. an approach detection section, an operational amplifier section that calculates and amplifies the signal detected by the detection section, and transmits the signal amplified by the operational amplifier section to a portable receiver carried by each worker in the track maintenance work area. A train approach warning device comprising: a transmitting section, wherein the portable receiver includes an alarm section configured to issue a train approach warning based on a signal transmitted from the transmitting section. 2) The train approach warning device according to claim 1, wherein the warning section is configured to activate the warning device in accordance with the speed of the approaching train. 3) A train approach detection unit comprising a sound wave transmitter installed at a predetermined distance from the approaching direction of the train and a receiver that reflects the sound waves emitted from the transmitter to the approaching train and receives the sound waves; An operational amplification section that operationally amplifies the signal detected by the detection section, a transmission section that transmits the signal amplified by the operational amplification section, and a set of these detection section, operational amplification section, and transmission section, and each set is It is installed in the approaching direction of a train passing through each of the up and down, double-track, or multi-track tracks, and receives individual signals transmitted from each transmitter and transmits them to portable receivers carried by track maintenance workers. and a relay transmitting/receiving section, and the portable receiver includes an alarm section configured to issue different train approach warnings for each of the above-mentioned up/down, double-track, or multiple-track lines based on individual signals transmitted from the relay transmitting/receiving section. Equipped with a train approach warning system.