Gradient and speed combined working condition development device and development method

Abstract

The invention provides a slope and speed combined working condition development device and method. The slope and speed combined working condition development device comprises a power module, a clock module, a microcontroller, a storage module, a GPS / SINS combined navigation module, a CAN analysis module, a GPRS / 4G module and a man-machine interaction module. According to the slope and speed combined working condition development device and method, the method for collecting the road slope through the GPS is provided for the problem that traditional road slope collection is difficult, the road slope can be calculated more accurately, the device and method are suitable for large-range road slope collection, and a foundation is laid for slope working condition development; the slope and speed combined working condition is constructed based on actual vehicle driving data fragments and road slope-slope change rate simultaneous distribution, and the road slope change can be better reflected; therefore, the method can provide technical support for standard formulation in the fields of government energy consumption and emission and enterprise vehicle type product development and experimental design, and has important social significance and economic value.

Description

technical field [0001] The invention belongs to the field of transportation, and in particular relates to a development device and a development method for slope-velocity combination working conditions. Background technique [0002] Vehicle driving conditions are an important common basic technology in the automotive industry, and are the basis of vehicle energy consumption / emission test methods and limit standards. However, the road slope is not considered in the traditional vehicle operating conditions, and the road slope has an important impact on the power, economy and emission characteristics of the vehicle. On the one hand, the energy consumption and emissions of the vehicle increase significantly with the increase of the slope; on the other hand, the slope of the road will significantly increase the power demand of the vehicle, and in some cases, the vehicle will be forced to switch to a lower gear to ensure sufficient climbing. slope capability. [0003] Although t...

AI Technical Summary

Problems solved by technology

[0004] First of all, accurate slope acquisition has high requirements for vehicle-mounted terminals. There are usually two ways to obtain slopes in the industry. The first is to obtain slope information by establishing a GNSS base station and obtaining elevation information through GPS RTK mode. This method is difficult to provide base station information (workload large, high cost), large consumption of acquisition and data processing hardware and software resources, the second is to combine geographic information and calculate the slope through altitude, but the accuracy of the altitude signal is low, and the calculated slope value has a large error; secondly, the slope tool The development of the situation is more difficult, and it is necessary to take into account the slope, speed and time at the same time, but there is a complex coupling relationship between the three

[0005] At present, the development methods of slope working conditions mainly include short-travel analysis and time series prediction method. Most of the slope working conditions are mainly based on short-segment division, but they are only suitable for tractors, which run for a long time and have relatively The simple car model belongs to the direct interception method, which does not solve the complex coupling problem of slope, speed and time

The time series analysis method mainly uses Markov, fuzzy logic and other algorithms to predict, and the final construction condition contains slope information. Since the actual operating data of the vehicle is not collected, there will be obvious problems such as distortion and step discontinuity

Images