INTERFACE FOR A MEASURING TRANSDUCER

Abstract

The present disclosure relates to an interface for a measuring transducer for receiving and processing measured data, comprising an input, an output, and an acoustic coupler having an acoustic transmitter and an acoustic receiver, wherein the acoustic transmitter and the acoustic receiver are acoustically coupled to each other, wherein the acoustic transmitter is connected to the input, and the acoustic receiver is connected to the output, such that the input is galvanically isolated from the output.

Claims

1. An interface for a measuring transducer for receiving and processing measured data, comprising: an input; an output; and an acoustic coupler having an acoustic transmitter and an acoustic receiver, wherein the acoustic transmitter and the acoustic receiver are acoustically coupled to each other, and wherein the acoustic transmitter is connected to the input, and the acoustic receiver is connected to the output such that the input is galvanically isolated from the output.

2. The interface according to claim 1, wherein the acoustic transmitter is a piezoelectric element and the acoustic receiver is a piezoelectric element.

3. The interface according to claim 2, wherein a distance between the acoustic transmitter and the acoustic receiver is from 1 mm to 10 mm.

4. The interface according to claim 1, wherein the acoustic transmitter and the acoustic receiver are acoustically coupled to each other by air.

5. The interface according to claim 1, further comprising a transducer housing, wherein the acoustic coupler is disposed in the transducer housing.

6. A measuring transducer for receiving and processing measured data, comprising: a transducer housing having at least one circuit chamber in the interior of the transducer housing; and an electronic circuit disposed in the circuit chamber and having at least one interface for supplying a sensor and for receiving and processing measured data from the sensor, the interface having an input, an output, an acoustic coupler having an acoustic transmitter and an acoustic receiver, wherein the acoustic transmitter and the acoustic receiver are acoustically coupled to each other, and wherein the acoustic transmitter is connected to the input, and the acoustic receiver is connected to the output such that the input is galvanically isolated from the output.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present disclosure is explained in more detail based upon the following drawings. Illustrated are:

[0019] FIG. 1 shows a schematic sketch of an interface for a measuring transducer, and

[0020] FIG. 2 shows a circuit of an interface corresponding to FIG. 1.

DETAILED DESCRIPTION

[0021] FIG. 1 shows a schematic sketch of an interface 1 for a measuring transducer (not shown) for receiving and processing measured data. The interface 1 comprises an input 6, an output 7, and an acoustic coupler 2. The acoustic coupler 2 has an acoustic transmitter 3 and an acoustic receiver 4, wherein the acoustic transmitter 3 and the acoustic receiver 4 are acoustically coupled to each other. The acoustic coupler 2, including the acoustic transmitter 3 and the acoustic receiver 4, are arranged in a transducer housing 8.

[0022] The transmission of a signal at a frequency between 300 Hz and 1 kHz was successfully transmitted by the interface. The transmission was demonstrated by an oscilloscope.

[0023] FIG. 2 shows a circuit of an interface 1 corresponding to FIG. 1. The acoustic transmitter 3 is connected to the input 6, and the acoustic receiver 4 is connected to the output 7 of the interface 1. In this manner, the input 6 is galvanically isolated from the output 7. The acoustic transmitter 3 and the acoustic receiver 4 are each designed as a piezoelectric element. The piezoelectric elements originate from two worn-out electric lighters. The piezo crystals were removed therefrom and joined at a distance of 3 mm. The structure was soldered to a part of a printed circuit board and surrounded with balsa wood, which served as the transducer housing 8.