A Protection System for Echo Sounder

Abstract

The invention provides a protection system for an echo sounder, which includes a software control unit, a hardware monitoring unit, a processing unit and an execution unit; the software control unit controls the output of three-way signals by means of a timer inside a single-chip microcomputer, and the three-way The signal output includes: timing synchronization pin P0, transmitting circuit output pulse width control pin P1 and transmitting circuit output pulse width allowing pin P2; the hardware monitoring unit has a built-in hardware timer for periodically outputting pulse width, outputting The pin is the hardware protection pin P3; the processing unit judges whether to drive the transmitting circuit to work according to the input of the transmitting circuit output pulse width control pin P1, the transmitting circuit output pulse width allowing pin P2, and the output hardware protection pin P3: when the processing unit According to the output pulse width control pin P1 of the transmitter circuit, the output pulse width of the transmitter circuit allows the pin P2, and the output hardware protection pin P3 to drive the transmitter circuit to work when the output is at a high level at the same time, otherwise the transmitter circuit is turned off.

Description

technical field [0001] The invention relates to the field of surveying and mapping, in particular to a protection system for an echo sounder. Background technique [0002] The echo tester generates an instantaneous output voltage with a certain pulse width through the transmitting circuit, thereby driving the transducer, causing the transducer to vibrate violently, thereby generating ultrasonic waves, and realizing depth measurement; the instantaneous output pulse width of the transmitting circuit is generally controlled by a single-chip microcomputer. The larger the output pulse width, the greater the energy loss of the transmitting circuit and the more serious the heat generation; in actual use, due to the high power, the electromagnetic interference inside the depth sounder is very serious, and it is easy to cause the single-chip program to run away. In an instant, the output state of the microcontroller is to drive the transmitter circuit to output the pulse width voltag...

AI Technical Summary

Problems solved by technology

[0002] The echo tester generates an instantaneous output voltage with a certain pulse width through the transmitting circuit, thereby driving the transducer, causing the transducer to vibrate violently, thereby generating ultrasonic waves, and realizing depth measurement; the instantaneous output pulse width of the transmitting circuit is generally controlled by a single-chip microcomputer. The larger the output pulse width, the greater the energy loss of the transmitting circuit and the more serious the heat generation; in actual use, due to the high power, the electromagnetic interference inside the depth sounder is very serious, and it is easy to cause the single-chip program to run away. In an instant, the output state of the microcontroller is to drive the transmitter circuit to output the pulse width voltage. Since the normal software process has been disrupted, the transmitter circuit will always maintain the output pulse width voltage state, which will cause the transmitter circuit device to burn out and cause serious consequences.

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