JJF 1578.1-2016 English PDF

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JJF 1578.1-2016: Validation Method of Calculating Mileage and Time for App-based Ride-hailing Operation Service Platform(for trial implementation)
Status: Valid

JJF 1578.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1578.1-2016	209	Add to Cart	3 days	Validation Method of Calculating Mileage and Time for App-based Ride-hailing Operation Service Platform(for trial implementation)	Valid
JJF 1578.1-2016	209	Add to Cart	3 days	Validation Method of Calculating Mileage and Time for App-based Ride-hailing Operation Service Platform(for trial implementation)	Valid

Similar standards

GB/T 3222.1   JJF 1234   JJF 1396   JJF 1578.3   JJF 1578.2   

Basic data

Standard ID: JJF 1578.1-2016 (JJF1578.1-2016)
Description (Translated English): Validation Method of Calculating Mileage and Time for App-based Ride-hailing Operation Service Platform(for trial implementation)
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A57
Word Count Estimation: 9,914
Date of Issue: 2016-10-21
Date of Implementation: 2016-11-01
Regulation (derived from): State Administration of Quality Supervision, Inspection and Quarantine Notice No.108 of 2016
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine

JJF 1578.1-2016: Validation Method of Calculating Mileage and Time for App-based Ride-hailing Operation Service Platform(for trial implementation)

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Validation Method of Calculating Mileage and Time for App-based Ride-hailing Operation Service Platform (for trial implementation) National Metrological Technical Code of the People's Republic of China Network booking taxi business service platform Scheduling Verification Method (Trial) Ride-hailingOperationServicePlatform (fortrialimplementation) 2016-10-21 release 2016-11-01 implementation State Administration of Quality Supervision, Inspection and Quarantine issued Network booking taxi business service platform Scheduling Verification Method (Trial) ServicePlatform (fortrialimplementation) Unit. National Time Frequency Measurement Technical Committee The main drafting unit. Beijing Institute of Metrology and Testing (National Satellite Navigation and Timing Industry Measurement and Testing Center) Beijing University of Aeronautics and Astronautics Participated in the drafting unit. Beijing University of Technology National Defense University China Metrology University This specification entrusts the National Time Frequency Measurement Technical Committee to explain The main drafters of this specification. Zhong Chongxia (Beijing Institute of Metrology and Measurement Science) (National Satellite Navigation and Timing Industry Measurement and Testing Center) Yao Hejun (Beijing Institute of Metrology and Testing Science) (National Satellite Navigation and Timing Industry Measurement and Testing Center) Xu Yuan (Beijing Institute of Metrology and Testing Science) (National Satellite Navigation and Timing Industry Measurement and Testing Center) Qin Honglei (Beijing University of Aeronautics and Astronautics) Participate in the drafters. Zhu Jiangmiao (Beijing University of Technology) Zhang yonghu (National University of Defense Technology) Jin Shangzhong (China Metrology University)

table of Contents

Introduction (II) 1 Scope (1) 2 References (1) 3 Overview (1) 4 Metering characteristics (1) 4.1 Accuracy of measurement (1) 4.2 Timing error (2) 5 General technical requirements (2) 6 Equipment for verification (2) 6.1 Satellite navigation signal simulator (2) 6.2 Standard scene library (2) 6.3 Standard navigation receiver (2) 6.4 real recording playback system (2) 6.5 combination of attitude positioning system (2) 6.6 standard clock (2) 7 Verification Project and Verification Method (3) 7.1 Verification Project (3) 7.2 Verification Method (3)

Introduction

This specification is intended to provide a verification method for the timing of the network reservation taxi service platform. This specification is prepared in accordance with the requirements of JJF 1071-2010 "Rules for the Preparation of National Metrological Calibration Standards". This specification is the first release. Network booking taxi business service platform Scheduling Verification Method (Trial)

1 Scope

This specification applies to the network booking taxi service platform for service time verification.

2 reference file

This specification refers to the following documents. Standard Guide for Software Evaluation of Metrology Instruments JJF 1182 Basic requirements for safety management of navigation electronic maps GB/T Code for in - vehicle navigation electronic map product GB/T Technical Requirements for Vehicle Terminals for Satellite Positioning Systems for Road Transport Vehicles JT/T 794-2011 Technical requirements for JT/T 796-2011 road transport vehicle satellite positioning system platform For dated references, only the dated edition applies to this specification; references that are not dated , The latest version (including all modifications) applies to this specification.

3 Overview

Network booking taxi service platform (hereinafter referred to as service platform) according to a certain sampling rate of real-time acquisition network (Hereinafter referred to as the network bus) satellite positioning terminal space location and time information, and through a certain Of the algorithm to calculate the mileage of the car and the time spent. Figure 1 for the service platform to measure the timing of work schematic. Figure 1 Service platform measurement timing work schematic

4 measurement characteristics

4.1 Measurement error -4% to 1%. 4.2 timing error ≤ 1.5s.

5 General technical requirements

The service platform has but is not limited to the following features. a) The navigation electronic map used shall meet the requirements of GB 20263 and GB/T 20267; b) obtaining the timekeeping data for the settlement of the bus; c) save the schedule data for more than two years; d) has a historical track playback function; e) with the timer data to prevent modification, anti-loss function.

6 verification equipment

6.1 satellite navigation signal simulator a) Output frequency. GNSS system used to support the vehicle-mounted satellite positioning device, including at least GPSL1 And BDSB1 frequency; b) Pseudo-precision. (0.0003 ~ 0.01) m; c) Pseudo-range change rate accuracy. (0.0003 ~ 0.01) m/s; d) A standard scene that matches the navigation electronic map can be set. 6.2 standard scene library Including at least. high-speed loop, auxiliary road, city main road, industrial park, residential area, near airport or TV Tower near the road, multipath fading scene [in the standard mileage scene, according to the obstacle position, height (0 ~ 1000) m And the surface signal reflectance (2 ~ 80), in the main path signal superimposed (0 ~ -30) dB multipath signal], the signal Off the scene [in the standard scene to increase the set signal interrupt time (1 ~ 120) s], abnormal point scene [in the analog standard In the mileage scene, the position offset is (150 ~ 1000) m of the abnormal positioning trip point] and other test scenarios. 6.3 Standard navigation receiver a) tracking sensitivity. ≤-160dBm; b) positioning deviation. ≤ 3m; c) anti-interference ability. dry letter ratio (60 ~ 80) dB; d) the measurement error. ≤ 10m. 6.4 real record playback system Recording signal quantization bit number ≥ 16, recording bandwidth ≥ 10MHz. 6.5 combination of attitude positioning system In the GNSS lock, positioning deviation. ≤ 0.05m, the measurement error. ≤ 0.03%; In GNSS loss lock 60s, positioning bias. ≤ 1m, the measurement error. ≤ 0.1%. 6.6 standard clock Maximum allowable error at current time. ± 0.5s.

7 Verify the project and verify the method

7.1 Verify the project Validation items are shown in Table 1. Table 1 Validate the project list Serial number Verification project name

1 meter error

2 timing error

7.2 Verification method 7.2.1 Measurement error 7.2.1.1 simulator method The instrument is connected as shown in Figure 2. Set the simulator test scene to the measurement error test scenario (see no less than satellites) 6, the signal power -120dBm or by the manufacturer interface level indicators). Figure 2 instrument connection diagram The satellite navigation signal simulator runs the standard scene library based on the electronic map in turn [visible satellites not less than 6, the signal power. -120dBm or by the manufacturer interface level indicators, the speed in the (0 ~ 120) km/h range ), The standard navigation receiver receives the signal transmitted by the simulator, outputs the first valid positioning value, runs continuously 15min, the positioning data sent to the service platform, after the end of the operation, calculated by the service platform mileage, according to formula (1) Calculate the measurement error. ΔR = R-R0 (1) Where. ΔR --- service platform measurement error, km; R --- service platform calculation mileage, km; R0 --- standard mileage, km. 7.2.1.2 Road test method In the network car to install the real record playback system and the combination of positioning attitude positioning system, driving in the actual road, real Record the playback system for continuous acquisition of satellite navigation signal of not less than 15min, while the use of combined positioning pose system measurement Of the mileage value as the standard value R0. During the test, the speed of the vehicle is about 0 to 120 km/h Including high-speed loop, auxiliary road, city main road, industrial park, residential area, near the airport or TV tower near the road Road, etc., and then in the laboratory will collect the data collected to form a standard scene library, and according to the test need to play back to the standard Quasi-navigation receiver, by the computer storage standard navigation receiver positioning data and upload to the service platform, by the service level Calculate the mileage, according to formula (1) to calculate the measurement error. 7.2.2 Timing error Use the standard clock to log on with the service platform server clock and record it. Calculate the service level according to formula (2) The current moment error of the server. Δt = t-t0 (2) Where. Δt --- current moment error, s; t --- service platform server time indication, s; t0 --- the standard clock time indication, s. The current time errors Δt1 and Δt2 of the start and end points are obtained by the above-described method, and the time is calculated according to the formula (3) The error is. Δτ = Δt2 - Δt1 (3) Where. Δτ --- service platform timing error, s; Δt2 --- end of the current time of the timing error, s; Δt1 --- the starting time of the current timing error, s. ......

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