Method for testing positioning deviation of external detection receiver

Abstract

The invention discloses a method for testing positioning deviation of an external inspection receiver, belongs to the field of receiver positioning precision testing, and aims to solve the problem that an existing receiver positioning deviation testing method cannot perform effective door-to-door testing on a receiver which cannot be detached and moved. The method comprises the following steps: correcting an acquisition playback device; connecting the input end of the corrected acquisition playback device with a navigation signal simulator, and acquiring and storing satellite navigation signals; broadcasting the stored satellite navigation signal to the tested receiver based on the power range of the tested receiver, and outputting positioning information; and comparing the position information in the positioning information satellite navigation signal to obtain a positioning deviation result. According to the invention, the problem of remote detection is solved, the operation of testers is facilitated, and the test efficiency is improved.

Description

Technical Field

[0001] This document relates to the field of receiver positioning accuracy testing, and in particular to a method for testing positioning deviation of an external detection receiver. Background Art

[0002] The test method for the positioning deviation of the receiver usually uses a navigation signal simulator to broadcast static scenes and fixed point location information (latitude and longitude values, longitude and altitude values). The navigation signal frequency is set to the navigation signal frequency that the receiver can receive and process. The receiver receives the navigation signal broadcast by the navigation signal simulator and outputs the positioning information. The positioning information output by the receiver is compared with the fixed point location information broadcast by the navigation signal simulator through the post-processing software to obtain the positioning deviation result. This test method requires the receiver under test to be sent to the testing center for measurement. However, since some receivers cannot be disassembled for inspection, the testing center can only ask the testing center to go out to the tested manufacturer for on-site testing. The navigation signal simulator and its supporting control system are usually used as standard test instruments in the testing center. They cannot be disassembled for inspection. In addition, the navigation signal simulator and its supporting control system are large in size and weight, which is not convenient for inspection.

[0003] Therefore, it is necessary to provide a method for testing the positioning deviation of an external detection receiver. Summary of the invention

[0004] This specification provides a test method for positioning deviation of an external inspection receiver, which is used to solve the problem that the existing receiver positioning deviation test method relies on a navigation signal simulator and its supporting system that are fixed in a detection center, are large in size and heavy in weight, and cannot effectively perform on-site testing on non-detachable and movable receivers. The method includes:

[0005] Correct the positioning consistency of the acquisition playback device based on the standard navigation receiver;

[0006] The input end of the calibrated acquisition and playback device is connected to a navigation signal simulator, and the acquisition and playback device acquires and stores the satellite navigation signal emitted by the navigation signal simulator;

[0007] The stored satellite navigation signal is broadcast to the receiver under test based on the power range of the receiver under test, and the receiver under test collects and replays the broadcasted satellite guidance signal and outputs positioning information;

[0008] The positioning information is compared with the position information in the satellite navigation signal broadcast by the acquisition and playback device to obtain the positioning deviation result.

[0009] Furthermore, the satellite navigation signal at least includes a fixed point value, a navigation signal frequency and a star almanac, and is compared with the positioning information based on the fixed point value.

[0010] Furthermore, the fixed point value includes longitude and latitude values, altitude values ​​and altitude values.

[0011] Furthermore, the positioning information is compared with the position information in the satellite navigation signal broadcast by the acquisition and playback device through post-processing software.

[0012] Furthermore, the positioning consistency of the acquisition and playback device is corrected based on the standard navigation receiver. The specific method is as follows:

[0013] Connect the navigation signal simulator to the acquisition and playback device and the standard navigation receiver through a low noise amplifier and a power divider, respectively, and broadcast the satellite navigation signal;

[0014] The acquisition and playback device acquires and stores the satellite navigation signal, and the standard navigation receiver receives the satellite navigation signal and records the first positioning data within a preset time;

[0015] Clear the ephemeris file in the standard navigation receiver, adjust the attenuation value of the acquisition and playback device to make the input signal power of the standard navigation receiver consistent with the satellite navigation signal power, and connect the acquisition and playback device to the standard navigation receiver;

[0016] The acquisition and playback device plays the acquired satellite navigation signal to the standard navigation receiver, and records the second positioning data output by the standard navigation receiver within a preset time;

[0017] The first positioning data and the second positioning data are compared to obtain deviation data, and the acquisition and playback device is calibrated based on the deviation data.

[0018] Furthermore, after recording the first positioning data of the preset time, the acquisition and playback device stops acquiring satellite navigation signals.

[0019] Furthermore, during the calibration of the acquisition and playback device, when the satellite navigation signal is broadcast, the number of visible stars is no less than 10.

[0020] Furthermore, before the standard navigation receiver outputs the first positioning data, the internal ephemeris file is cleared.

[0021] Furthermore, based on the post-processing software, the positioning deviation and positioning precision of the first positioning data R1 and the second positioning data R2 are calculated, and the positioning deviation and positioning precision of the acquisition and playback device are calculated based on the positioning deviation and positioning precision. The acquisition and playback device is calibrated according to the positioning deviation and positioning precision of the acquisition and playback device.

[0022] Furthermore, the positioning deviation Δδ of the acquisition and playback device and the positioning precision of the acquisition and playback device The calculation method is:

[0023]

[0024] Among them, δ R1 is the positioning deviation of the first positioning data, δ R2 is the positioning deviation of the second positioning data, is the positioning precision of the first positioning data, is the positioning accuracy of the second positioning data.

[0025] At least one of the above technical solutions adopted in the embodiments of this specification can achieve the following beneficial effects:

[0026] Improve test flexibility: By using a portable acquisition and playback device, on-site testing of non-detachable receivers can be achieved, increasing test flexibility and scope of application.

[0027] Ensure test accuracy: By correcting the positioning consistency of the acquisition and playback device based on a standard navigation receiver, the consistency of the satellite navigation signal used in the test process and the actual signal is ensured, thereby ensuring the accuracy of the test results.

[0028] Simplified test process: This method does not require the receiver under test to be sent to the test center, nor does it require the bulky navigation signal simulator to be carried to the site, which simplifies the test process and reduces the test cost and complexity.

[0029] Enhanced data reliability: The reliability and credibility of the test data are enhanced by analyzing and comparing the positioning information through post-processing software, as well as calculating and correcting the precise positioning deviation and positioning precision of the acquisition and playback device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0031] Figure 1 A schematic diagram of a deviation measurement method of the prior art;

[0032] Figure 2 A schematic diagram of equipment connection for a method for testing positioning deviation of an external detection receiver provided by the present invention;

[0033] Figure 3 A first schematic diagram of a signal collector calibration process in a method for testing positioning deviation of an external detection receiver provided by the present invention;

[0034] Figure 4 A second schematic diagram of the signal collector calibration process in the testing method for positioning deviation of an external detection receiver provided by the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0036] In the prior art, Figure 1 As shown, the deviation measurement is achieved by connecting the navigation signal simulator to the receiver under test. Specifically, the navigation signal simulator is used to broadcast static scene satellite navigation signals to the receiver under test. The broadcast satellite navigation signals contain fixed point values ​​(latitude and longitude values, latitude values ​​and altitude values), navigation signal frequencies and almanac information. The receiver receives the satellite navigation signals broadcast by the navigation signal simulator and outputs positioning information. The positioning information output by the receiver is compared with the fixed point position information broadcast by the navigation signal simulator through post-processing software to obtain the positioning deviation result. It is impossible to solve the problem that the navigation signal simulator and its supporting system, which are large in size and heavy in weight and fixed in the detection center, cannot effectively conduct on-site testing on non-detachable and movable receivers.

[0037] The following combination Figure 2-Figure 4 , the technical solutions provided by the embodiments of the present application are described in detail, and the present invention proposes a method for testing the positioning deviation of an external detection receiver, the method comprising:

[0038] Step S1, correcting the positioning consistency of the acquisition and playback device based on a standard navigation receiver;

[0039] Step S2, connecting the input end of the calibrated acquisition and playback device to a navigation signal simulator, and the acquisition and playback device acquires and stores the satellite navigation signal emitted by the navigation signal simulator;

[0040] Step S3, broadcasting the stored satellite navigation signal to the receiver under test based on the power range of the receiver under test, and the receiver under test collects and replays the broadcasted satellite guidance signal and outputs positioning information;

[0041] Step S4, comparing the positioning information with the position information in the satellite navigation signal broadcast by the acquisition and playback device to obtain a positioning deviation result.

[0042] In order to more clearly illustrate a method for testing positioning deviation of an external detection receiver of the present invention, the following is combined with Figure 1 Each step in the embodiment of the present invention is described in detail as follows:

[0043] Step S1, correcting the positioning consistency of the acquisition and playback device based on a standard navigation receiver;

[0044] like Figure 3 and Figure 4 As shown, the correction process in the present invention specifically includes the following steps:

[0045] Step S11, connecting the navigation signal simulator to the acquisition and playback device and the standard navigation receiver through a low noise amplifier and a power divider, respectively, and broadcasting the satellite navigation signal;

[0046] Step S12, the acquisition and playback device acquires and stores the satellite navigation signal, and the standard navigation receiver receives the satellite navigation signal and records the first positioning data within a preset time; wherein the preset time is 30 minutes.

[0047] Step S13, clearing the ephemeris file in the standard navigation receiver, adjusting the attenuation value of the acquisition and playback device, making the input signal power of the standard navigation receiver consistent with the satellite navigation signal power, and connecting the acquisition and playback device to the standard navigation receiver;

[0048] Step S14, the acquisition and playback device plays the acquired satellite navigation signal to the standard navigation receiver, and records the second positioning data output by the standard navigation receiver within a preset time;

[0049] Step S15: compare the first positioning data with the second positioning data to obtain deviation data, and calibrate the acquisition and playback device based on the deviation data.

[0050] Specifically, in step S11, the specific connection process is as follows:

[0051] Step S111, connecting the output end of the navigation signal simulator to the input end of the low noise amplifier.

[0052] Step S112: Lead a cable from the output end of the low noise amplifier and connect it to the input end of the power divider.

[0053] Step S113: Use two or more independent cables to connect the output end of the power divider to the input end of the acquisition and playback device and the antenna input end of the standard navigation receiver respectively.

[0054] The low noise in the low noise amplifier is mainly quantified by its noise factor, and a noise factor below 1 dB is considered very ideal, while a noise factor below 2 dB is generally acceptable. In this embodiment, it is preferably below 1 dB.

[0055] In step S12, the navigation signal simulates the frequency signal supported by both the acquisition and playback device and the standard navigation receiver. The signal amplitude is within the range received by the acquisition and playback device and the standard navigation receiver. The acquisition and playback device bits are set to so-called appropriate values.

[0056] Since it is a static scene, which means there will be no movement during the test, the number of visible satellites should be no less than 10, in order to provide enough satellite signals to obtain high-precision positioning results. The signal strength should also be moderate, neither too weak to cause reception difficulties nor too strong to exceed the processing range of the device.

[0057] Before the standard navigation receiver outputs the first positioning data, the internal ephemeris file is cleared. After recording the first positioning data of the preset time, the acquisition playback device is stopped to collect satellite navigation signals.

[0058] In step S13, the ephemeris file in the standard navigation receiver needs to be cleared. Ephemeris is a data set of satellite orbit information. Clearing old ephemeris is to prevent previous data from affecting the results of the current test and ensure that the test is based on the latest satellite position information.

[0059] In step S14, the preset time is 30 minutes. After obtaining the second positioning data for 30 minutes, the recording of the standard navigation receiver data is stopped, and the acquisition and playback device acquisition signals are stopped.

[0060] In step S15, the positioning deviation and positioning precision of the first positioning data R1 and the second positioning data R2 are calculated, and the positioning deviation and positioning precision of the acquisition and playback device are calculated based on the positioning deviation and positioning precision. The acquisition and playback device is calibrated according to the positioning deviation and positioning precision of the acquisition and playback device.

[0061] Positioning deviation Δδ of the acquisition and playback device and positioning precision of the acquisition and playback device The calculation method is:

[0062]

[0063] Among them, δ R1 is the positioning deviation of the first positioning data, δ R2 is the positioning deviation of the second positioning data, is the positioning precision of the first positioning data, is the positioning accuracy of the second positioning data.

[0064] Through the above steps, the performance of the acquisition and playback device can be evaluated under controlled conditions and compared with a standard navigation receiver with known good performance to verify whether the positioning consistency of the acquisition and playback device is as expected. Such a calibration process helps ensure that the acquisition and playback device can provide accurate and reliable positioning data during external inspection tests.

[0065] like Figure 2 As shown, step S2, connecting the input end of the calibrated acquisition and playback device to the navigation signal simulator, and the acquisition and playback device acquires and stores the satellite navigation signal emitted by the navigation signal simulator;

[0066] The satellite navigation signal at least includes a fixed point value, a navigation signal frequency and an almanac, and is compared with the positioning information based on the fixed point value.

[0067] The fixed point value includes longitude and latitude values, altitude values ​​and latitude values.

[0068] In step S4, the positioning information is compared with the position information in the satellite navigation signal broadcast by the acquisition and playback device through post-processing software.

[0069] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A method for testing positioning deviation of an external detection receiver, characterized in that: The method includes: Correct the positioning consistency of the acquisition playback device based on the standard navigation receiver; Connecting the input end of the calibrated acquisition and playback device to a navigation signal simulator, wherein the acquisition and playback device acquires and stores the satellite navigation signal emitted by the navigation signal simulator; The stored satellite navigation signal is broadcast to the receiver under test based on the power range of the receiver under test, and the receiver under test collects and replays the broadcasted satellite guidance signal and outputs positioning information; The positioning information is compared with the position information in the satellite navigation signal broadcast by the acquisition and playback device to obtain the positioning deviation result.

2. The method for testing positioning deviation of an external detection receiver according to claim 1, characterized in that: The satellite navigation signal at least includes a fixed point value, a navigation signal frequency and a star almanac, and is compared with the positioning information based on the fixed point value.

3. The method for testing positioning deviation of an external detection receiver according to claim 2, characterized in that: The fixed point value includes longitude and latitude values, altitude values ​​and latitude values.

4. The method for testing positioning deviation of an external detection receiver according to claim 1, characterized in that: The positioning information is compared with the position information in the satellite navigation signal broadcast by the acquisition player through post-processing software.

5. The method for testing positioning deviation of an external detection receiver according to claim 1, characterized in that: The positioning consistency of the acquisition and playback device is corrected based on the standard navigation receiver. The specific method is as follows: Connect the navigation signal simulator to the acquisition and playback device and the standard navigation receiver through a low noise amplifier and a power divider, respectively, and broadcast the satellite navigation signal; The acquisition and playback device acquires and stores the satellite navigation signal, and the standard navigation receiver receives the satellite navigation signal and records the first positioning data within a preset time; Clear the ephemeris file in the standard navigation receiver, adjust the attenuation value of the acquisition and playback device to make the input signal power of the standard navigation receiver consistent with the satellite navigation signal power, and connect the acquisition and playback device to the standard navigation receiver; The acquisition and playback device plays the acquired satellite navigation signal to the standard navigation receiver, and records the second positioning data output by the standard navigation receiver within a preset time; The first positioning data and the second positioning data are compared to obtain deviation data, and the acquisition and playback device is calibrated based on the deviation data.

6. A method for testing positioning deviation of an external detection receiver according to claim 5, characterized in that: After recording the first positioning data of the preset time, the acquisition and playback device stops collecting satellite navigation signals.

7. The method for testing positioning deviation of an external detection receiver according to claim 5, characterized in that: During the calibration of the acquisition and playback device, no less than 10 satellites shall be visible when the satellite navigation signal is broadcast.

8. The method for testing positioning deviation of an external detection receiver according to claim 5, characterized in that: Before the standard navigation receiver outputs the first positioning data, the internal ephemeris file is cleared.

9. The method for testing positioning deviation of an external detection receiver according to claim 5, characterized in that: Based on the post-processing software, the positioning deviation and positioning precision of the first positioning data R1 and the second positioning data R2 are calculated, and the positioning deviation and positioning precision of the acquisition and playback device are calculated based on the positioning deviation and positioning precision. The acquisition and playback device is calibrated according to the positioning deviation and positioning precision of the acquisition and playback device.

10. A method for testing positioning deviation of an external detection receiver according to claim 9, characterized in that: The calculation method of the positioning deviation Δδ and the positioning precision Δσ of the acquisition and playback device is as follows: Among them, δ R1 is the positioning deviation of the first positioning data, δ R2 is the positioning deviation of the second positioning data, σ R1 is the positioning precision of the first positioning data, σ R2 is the positioning accuracy of the second positioning data.

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