CN202420737U

CN202420737U - Ship stern shaft power test signal acquisition device with remote data transmission function

Info

Publication number: CN202420737U
Application number: CN2011205284092U
Authority: CN
Inventors: 杨福宝; 王建
Original assignee: Wuhan University of Technology WUT
Current assignee: Wuhan University of Technology WUT
Priority date: 2011-12-15
Filing date: 2011-12-15
Publication date: 2012-09-05
Anticipated expiration: 2021-12-15

Abstract

The utility model relates to a ship stern shaft power test signal acquisition device with a remote data transmission function. The ship stern shaft power test signal acquisition device comprises a singlechip, a signal conditioning circuit and a signal acquisition circuit, wherein the signal acquisition circuit comprises a Schmidt trigger and a data selector. The ship stern shaft power test signal acquisition device is characterized in that the input end of the Schmidt trigger in the signal acquisition circuit is connected with at least one rotating speed sensor of a tested ship stern shaft; the input end of the signal conditioning circuit is connected with at least one torsion sensor of the tested ship stern shaft; the output end of the Schmidt trigger is connected with the singlechip through the data selector; and the signal conditioning circuit is connected with the singlechip through an analog/digital (A/D) converter. The ship stern shaft power test signal acquisition device can precisely sample, display, store and package a plurality of paths of signals and send the signals to an upper machine and can meet the application requirement on real-time detection.

Description

Screw shaft of ship power test signal pickup assembly with data long-distance transmissions function

Technical field

The utility model belongs to the detection range of screw shaft of ship rotating speed and moment of torsion and shaft power, particularly a kind of screw shaft of ship power test signal pickup assembly with data long-distance transmissions function.

Background technology

Marine shafting shaft power is the most important performance parameter of boat diesel engine and propulsion system thereof.New ship dispatch from the factory or the hull transformation when paying the shipowner marine shafting shaft power be main measurement parameter, it also is the major parameter of monitoring boat diesel engine and propulsion system duty thereof.The marine shafting shaft power measurements mainly uses rotating speed and strain torque sensor to add the form of data capture card at present, and test process must be long-time on duty by the abominable stern tube shaft of environment.

Existing stern tube shaft power test, pattern and Related product adopt general data collecting card, cost is high, the tachometric survey precision is low, test process must be on duty by the stern tube shaft of cabin, the present situation that test environment is abominable.

Summary of the invention

The purpose of the utility model provides a kind of application flush bonding processor; Combined high precision, wide voltage input AD converter satisfy the accuracy of measuring-signal, and have increased memory function; Processes and displays that both can be real-time; Also can store data, reduce the screw shaft of ship power test signal pickup assembly with data long-distance transmissions function of cost simultaneously again, to overcome the deficiency of prior art.

To achieve these goals, the technical scheme that the utility model adopted is:

A kind of screw shaft of ship power test signal pickup assembly with data long-distance transmissions function; Comprise single-chip microcomputer, signal adjustment circuit and signal acquisition circuit; Said signal acquisition circuit comprises Schmidt trigger and data selector; Be characterized in: the input end of Schmidt trigger links to each other with at least one speed probe of tested screw shaft of ship in the said signal acquisition circuit; At least one torque sensor of the input end of said signal adjustment circuit and tested screw shaft of ship joins, and the output terminal of said Schmidt trigger is connected with single-chip microcomputer through data selector, and said signal adjustment circuit is connected with single-chip microcomputer through A/D converter.

Said single-chip microcomputer also is connected with a communication converter.

Said single-chip microcomputer also is connected with external keyboard, LCD display module and FLASH storer.

The utility model is a kind of SCM Based multichannel rotating speed torque-measuring apparatus that designs for rotating speed and moment of torsion and shaft power on the real-time detection screw shaft of ship.The utility model can satisfy the requirement of screw shaft of ship power detection from the angle of practical engineering application, can farthest reduce cost again, improves the test job environment.

Description of drawings

Fig. 1 is the utility model theory diagram.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe in detail.

Fig. 1 is the utility model theory diagram, and the utility model comprises: STC89C51 single-chip microcomputer, Schmidt trigger CD40106, data selector, A/D converter ADS7825, LCD display module OCMJ12232C, serial ports URAT-485 converter, FLASH storer AT45DB161D, external keyboard (comprising that 4 select 1 AND circuit).

The pulse signal of speed probe is through the sine wave of the 5V of Schmidt trigger shaping outputting standard on the screw shaft of ship; Single-chip microcomputer detects the input instruction control data selector switch gating of keyboard which signal is delivered to single-chip microcomputer; The high-low level that detects pulse changes; Come cycle of each pulse of accurate Calculation through counter, the mean value of getting a plurality of cycles is changed to its dress the frequency of signal again, again through interrupting and the measurement of precision frequencies such as timer completion; The signal of torque sensor is through obtaining the magnitude of voltage in the A/D converter measuring amplitude scope behind the bleeder circuit; Single-chip microcomputer is gathered the torque value on which road with SPI module controls AD according to the input instruction of external keyboard; And be sent in the single-chip microcomputer; Equally repeatedly sampling is averaged as final magnitude of voltage, is converted into torque value again; The LCD display module shows measured rotating speed and moment of torsion, and tachometer value is accurate to behind the radix point 1, and torque value is accurate to behind the radix point 3; Communication converter is sent to the host computer processing with measured data and shows after the conversion of URAT-485 converter; At last data measured is stored in the FLASH storer, be convenient to the inquiry and the comparison of data.This device is realized the accurate sampling of multiple signals, shows, and storage, and packing sends host computer to through serial ports, can satisfy the application requirements of real-time detection.

The content of not doing in this instructions to describe in detail belongs to this area professional and technical personnel's known prior art.

Claims

1. screw shaft of ship power test signal pickup assembly with data long-distance transmissions function; Comprise single-chip microcomputer, signal adjustment circuit and signal acquisition circuit; Said signal acquisition circuit comprises Schmidt trigger and data selector; It is characterized in that: the input end of Schmidt trigger links to each other with at least one speed probe of tested screw shaft of ship in the said signal acquisition circuit; At least one torque sensor of the input end of said signal adjustment circuit and tested screw shaft of ship joins, and the output terminal of said Schmidt trigger is connected with single-chip microcomputer through data selector, and said signal adjustment circuit is connected with single-chip microcomputer through A/D converter.

2. the screw shaft of ship power test signal pickup assembly with data long-distance transmissions function as claimed in claim 1 is characterized in that: said single-chip microcomputer also is connected with a communication converter.

3. the screw shaft of ship power test signal pickup assembly with data long-distance transmissions function as claimed in claim 1, it is characterized in that: said single-chip microcomputer also is connected with external keyboard, LCD display module and FLASH storer.