Design Of Tramcar Speed Measuring And Record-Analyzing Instrument

For a long time, because there is no an effective means of measurement and management, the measurement of tramcar speed is ignored and the intendance and control over tramcar speed under the coal mine is in the state of vacuum. The instrument which is introduced in this paper can solve this problem effectively and it combines alarm, saving data and data manage with speed-measurement. Through the use of this instrument, not only the workers under the coal mine can operate tramcars on the appropriate speed, but also the ones on the ground can know the state of tramcars in detail so as to run them effective.There are particular descriptions in four aspects in this paper: speed-measure instrument, data recorder, data receiver and computer software. Speed-measure instrument which is used to measure tramcar speed, transforms the signal of speed into the signal of frequency by computer and it has high accuracy and stability. The sensor is hall sensor which has strong anti-jamming ability especially it is fit for environment full of a lot of power and strong noise. Because tramcar always changes its locality, it is difficulty to transmit information transmission between under the coal mine and on the ground through wire or wireless. Therefore data recorder is designed to complete this assignment. During tramcar is working, speed measuring instrument measure and display tramcar speed. When the speed exceeds upper limit, instrument will give an alarm and data recorder which can be inserted and drew will collect speed and time information. Motorman of tramcar will not take data recorder to the ground until motorman of tramcar shift exchange. Then the information will be read by data receiver on the ground which transmits it to computer.