Development Of The Verification Device For Taximeter

With the improvement of the national economic level,the number of taxis is increasing day by day.The meter records the mileage of the car,which provides the basis for the regular maintenance,repair and scrap of the car.The verification of the taximeter based on mileage pricing has become particularly important.In view of the lack of conditions in the verification of the existing vehicle meter,the key problem of neglecting the meter and the vehicle as a whole detection,and the problems of human interference and low reliability in the traditional detection methods,this paper develops the vehicle meter verification system by using the existing standard speed table on the detection line,and completes the mileage recording of the meter on the premise of reducing the cost.It shall be verified at the same time as the vehicle meter.This paper mainly focuses on the overall analysis and in-depth study of the vehi cle detection system for the use error of taximeter and vehicle belt meter.Firstly,the t heoretical analysis of the detection error is carried out to avoid the previous measure ment of tire correction coefficient and improve the detection efficiency.Then it intro duces the hardware composition of the device.On the basis of the original speedomet er,a variable-frequency drive system is added to reduce the human error and the erro r within one hundred meters caused by the insufficient accuracy of the meter meter,a nd to better control and simulate the actual running state of the vehicle,so as to impr ove the accuracy and reliability of the detection.The wheel anti sway mechanism is a dded to improve the safety of detection.At the same time,the mechanical connection of sensor,motor and roller is designed.And the signal acquisition,processing and m otor control system of the whole detection system are designed.The photoelectric en coder is selected as the sensor of mileage detection,and the technical method of enco der output signal is studied by single-chip microcomputer,so as to effectively improv e the processing speed of system signal acquisition.The method of anti-jamming bas ed on the main interference source is studied to make the detection result more accur ate.Then the software of the system is designed,including the lower computer softw are and the upper computer software.The lower computer software mainly realizes t he detection and communication,and the upper computer mainly completes the visua lization of human-computer interaction.Based on this,the whole system is tested.Fi nally,through the actual test,it shows that the new designed Taximeter verification d evice has good performance and anti-interference performance,and can achieve stabl e output.