MEASURING DIAGNOSTIC LABORATORY for testing consumer navigation equipment in the mobile mode

摘要

The utility model mobile test and diagnostic laboratory for monitoring the navigation equipment of the consumer and information and navigation systems relates to the control systems of the accuracy characteristics of the navigation equipment of the consumer (NAP), which operates on the signals of navigation satellites of space navigation systems GLONASS / GPS in mobile mode of navigation definitions, ie. e. NAP when mounted on a vehicle (the vehicle).; The constantly expanding park various foreign and domestic NAP samples poses the problem of developer systems select the most appropriate sample solutions for specific tasks. The criterion for selecting the desired sample NAP is an optimal combination of such factors as the accuracy of navigation determinations, the weight and size characteristics, resistance to external factors, power consumption and, to a large extent, its cost. The latter factor is particularly important when a large number of purchases necessary NAP. Proper selection of the sample NAP consumer can make on the basis of comparative tests of several NAP samples under identical conditions of operation.; To conduct the test mobile NAP and INS intended mobile testing laboratory developed a technique and set of software and hardware, to assess the accuracy characteristics of the actual test samples NAP.; The method is based on the construction of the so-called reference trajectory of movement of the vehicle, which is constructed in posteriori based processing mode synchronous code and phase measurements of two standard dual frequency GLONASS / GPS receivers, one of which is stationary and acts as a control and correction station and the second installed on the vehicle.; The reference trajectory is a vehicle motion trajectory of the mobile phase center reference receiver antenna mounted on the roof of the vehicle.; Performance characteristics of the test sample NAP defined with respect to the reference trajectory at synchronous timings. The test results showed that the accuracy of the construction of the reference trajectory movement of the vehicle, using as reference receivers (stationary and mobile) Legacy dual frequency receivers, Javad manufactured, is two - three centimeters in open areas of movement of the vehicle [1].; To perform navigation in the absence of the required amount of visible navigation satellites laboratory is equipped with the gyro sensor for measuring the angular position of the vehicle (in relative bearing) and the pulser, which acts as the odometer. As a pulse generator tested two possibilities - a sensor for measuring the rotational speed of the secondary shaft of the gearbox, and an anti-lock vehicle sensor system (ABS). To convert the sensor signals to digital mean using a programmable analog-to-digital converter. Binding measurement information from the sensors to the GPS system time it is made on the basis of the developed mathematical software. For this test laboratory reference receiver equipped with an additional option clock (second mark). All measuring information from the sensors during the experiment recorded in a portable computer.; The hardware of the Middle complex is easily portable, allowing you to use the test NAP any vehicle equipped with ABS.