Beidou GNSS/DR integrated navigation taxi metering and timing system and running method thereof

Abstract

The invention relates to a Beidou GNSS / DR integrated navigation taxi metering and timing system and a running method thereof, and the system comprises a GNSS navigation unit, an inertial navigation unit, a satellite timing unit, a reset protection unit, a Hall sensor, a function key, an empty license plate, a real-time clock, a metering microprocessor, a monitoring microprocessor, a non-volatile memory and a wireless communication unit. The Beidou GNSS / DR integrated navigation taxi metering and timing system and the running method thereof provided by the invention avoid metering problems of the traditional satellite navigation without navigation signals or under an environment of weak navigation signals such as section of tunnels, viaducts and urban canyons by metering the taxi with the Beidou GNSS / DR integrated navigation technology, achieve the sub-meter positioning accuracy by utilizing the GNSS ground enhancement technology and the optimized navigation algorithm, and solve the positioning problem in the complex environment with the DR technology, thereby finally making the vehicle trajectory continuous without breakpoints.

Description

technical field [0001] The invention relates to the technical field of taxis, in particular to a Beidou GNSS / DR integrated navigation taxi metering and timing system and an operating method thereof. Background technique [0002] Along with urban construction is accelerated day by day, taxi has become indispensable means of transportation in people's life. Taxi meter and timing device is a kind of measuring instrument installed and used in taxis. It charges according to the driving mileage and low-speed waiting time of the heavy vehicle, and finally calculates through the pricing microprocessor and displays the consumer’s cost through the display. price payable. The mileage of the heavy vehicle is realized by measuring the pulse of the Hall sensor or the pulse of the photoelectric sensor, and the length of the waiting time is calculated by measuring the time it takes for the vehicle to be lower than a certain driving speed. Assuming that the circumference of the taxi wheel ...

AI Technical Summary

Problems solved by technology

[0003] In the taxi industry, in order to earn more benefits, some drivers will artificially increase the number of pulses of the taximeter, so that the mileage displayed by the taximeter is higher than the actual mileage, and artificially modify the time so that the taxi’s The time does not match the actual time, so as to realize the bad behavior of overcharging and seriously damage the economic interests of passengers

[0004] At present, the following problems generally exist in the taxi meter timing device: first, the means of increasing the pulse and modifying the time is extremely concealed, so it is difficult for passengers to discover the cheating behavior of the taxi driver in time

Second, according to JJG517-2016 "Verification Regulations for Taxi Meters", the taximeter outputs a pulse every 100m when the vehicle is heavy, and it can be concluded that the distance meter accuracy of the existing taximeter is 100m, that is, the error is 0.1-99.9 m, according to the error analysis, the existing metering and timing devices have large dispersion and non-uniformity

Third, the existing timing device is a single independent system, the time reference is the internal clock unit, and the time reference of each timing device is inconsistent

Fourth, once there is a dispute between the driver and the passenger, the taxi monitoring center cannot obtain the historical location and trajectory of the taxi, so that the specific mileage cannot be determined

[0005] Chinese patent document CN101136109A discloses "a taxi meter timing device with a GPS positioning system". This invention utilizes GPS technology to enable the taxi meter meter device to record passengers' getting on and off locations (latitude and longitude) and vehicle running tracks, However, this invention only uses GPS technology to record the location (latitude and longitude) of passengers getting on and off the bus, does not use Beidou GNSS / DR technology for metering and timing, and does not use Beidou / GNSS information for metering and timing to prevent cheating

[0007] Although some research has been done on the issue of preventing taxi meter fraud, very little has been put into practice

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