DE29513966U1 - Measuring device for describing the overhead line height - Google Patents

Description

DESCRIPTION:

M esse inrieh do or to describe the overhead line height

The invention relates to a measuring device for describing the overhead line height.

A simple measuring device is to be described that can be easily installed and calibrated. At the same time, electrical operational reliability and the greatest possible signal/path linearity are to be guaranteed.

For this purpose, it is proposed to determine the height of the overhead line using ultrasonic sensors. The ultrasonic sensors are mounted on the pantograph and at a stationary point. In particular, a transmitter is permanently mounted on the rocker/contact strip, which follows the horizontal movement of the overhead line. A receiver is arranged vertically opposite, in particular on the vehicle roof. The transmitter and receiver work in the usual way. The travel time of the sound is measured by setting the start markers using a system clock (activating the transmitter and the receiver or their evaluation unit).

To achieve the necessary electrical neutrality, the system clock is transmitted to the transmitter via an optical fiber, possibly via radio or ultrasound. The transmitter is supplied electrically in the usual way via an optical generator (e.g. a solar cell) with, if necessary, an additional storage device (battery).

To protect the receiver from dust and moisture, a reflector is preferably mounted on the receiver. This means that the ultrasonic signal from the transmitter is sent vertically downwards to the reflector, which changes the direction of travel. The receiver does not need to be pointed in the direction of the transmitter. Depending on the angle of the reflector, the receiver can point almost vertically downwards.

Instead of the transmitter, the receiver can also be mounted on the pantograph and the transmitter on the roof of the vehicle. One disadvantage here is that both the system clock and the time pulse to confirm the reception of the US signal must be transmitted in an electrically neutral manner.

Claims (3)

Protection claims:. 1. Measuring device for describing the overhead line height, characterized in that this is determined, measured or recorded by an ultrasonic measuring device. 2. Measuring device for describing the overhead line height with ultrasonic sensors, characterized in that a transmitter or receiver is fixed to a part of the current collector that is movable by the overhead line - in particular on the rocker or on the contact strip - and the receiver or transmitter is preferably mounted horizontally opposite at a location that is preferably neutral with regard to the movement of the overhead line, in particular on the vehicle roof. 3. Electrically insulated measuring device for describing the overhead line height with ultrasonic sensors, characterized in that a transmitter or receiver is fixed to a part of the pantograph that is movable through the overhead line and the receiver or transmitter is mounted in particular on an electrically insulated part - in particular on the vehicle roof - and the system clock of the ultrasonic measuring device is transmitted via optical fiber, ultrasound or radio.