Handheld log indicator / transducer tester

Abstract

The invention relates to a handheld log indicator / a transducer tester. The handheld log indicator and the transducer tester comprise an MCU micro control unit, an LCD display screen control circuit, a key control circuit, a charging port circuit, an ultrasonic receiving module, an ultrasonic transmitting module, an underwater acoustic transducer test module, an NMEA detection module and an RS232 communication conversion module, wherein the LCD display screen control circuit, the key control circuit, the charging port circuit, the ultrasonic receiving module, the ultrasonic transmitting module, the underwater acoustic transducer test module, the NMEA detection module and the RS232 communication conversion module are all connected with the MCU micro control unit, and other circuits and function modules are controlled through the MCU micro control unit. According to the technical scheme, the handheld log indicator and the transducer tester are ingenious in design, high in precision, stable in performance and reliability and convenient to carry and use.

Description

technical field [0001] The invention relates to a tester, in particular to a hand-held odometer / transducer tester, which belongs to the technical field of detection and maintenance of marine equipment. Background technique [0002] The Doppler log is a measuring device for the ship's voyage and speed. It transmits sound waves to the seabed or water at a certain angle, and uses the Doppler frequency shift of the echo signal to measure the speed of the ship relative to the seabed or water flow. Transducers must be connected during the use, testing and maintenance of the speed log. Therefore, how to test whether the performance of the transducer meets the needs of customers is also an urgent problem to be solved. [0003] At present, the detection and maintenance methods of the speed log in the market are usually based on sea testing and tank testing. Since the static tank cannot simulate the navigation state of the ship relative to the water, a rotating tank needs to be built,...

AI Technical Summary

Problems solved by technology

[0003] At present, the detection and maintenance methods of the speed log in the market are usually based on sea testing and tank testing. Since the static tank cannot simulate the navigation state of the ship relative to the water, it is necessary to build a rotating tank, which will also consume a lot of manpower, material and financial resources.

Therefore, the equipment must be tested and inspected on a sailing ship. The cost of the experiment is high and the cycle is long, which brings great inconvenience to maintenance and greatly reduces the efficiency of inspection and maintenance.

[0004] Chinese invention patent ZL201310125490.3 discloses a docking system based on FPGA to simulate the seabed echo signal of Doppler log. The transmit signal is processed in the FPGA, and 8 independent echo waveform signal output channels are used to sequentially align the beams. Phase difference transmission can only simulate the seabed echo, but cannot fully detect the log and transducer

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