Beidou short message terminal testing device and method

Abstract

The invention discloses a Beidou short message terminal testing device and method, and relates to the field of testing. A controller controls a Beidou simulator to broadcast a Beidou satellite signal and transmits the Beidou satellite signal to a Beidou transceiver unit terminal through a circulator and a DC block; the controller judges the Beidou satellite signal receiving capability of a base band of the controller based on the three-dimensional precision transmitted by the Beidou transceiver unit terminal, and the Beidou transceiver unit terminal transmits a short message signal based on the Beidou satellite signal and a standard Beidou instruction and sequentially passes through the DC block, the circulator and the attenuator. According to the scheme, a short message signal is sent to a Beidou RDSS inbound receiver to isolate a direct current voltage component in the short message signal, the power of the isolated short message signal is limited in a preset power range, data demodulation is carried out through the Beidou RDSS inbound receiver, a controller is made to judge the ability of a baseband to transmit the short message signal, a wired mode test is adopted in the scheme, the cost is reduced, and the testing efficiency is improved. And the test scheme is simple, and the accuracy of aircraft part test is improved.

Description

Technical Field

[0001] The present invention relates to the field of testing, and in particular to a Beidou short message terminal testing device and method. Background Art

[0002] In the prior art, when the performance test of the Beidou transceiver unit terminal is carried out, the laboratory darkroom wireless test method is currently adopted. The darkroom wireless test requires that the Beidou transceiver unit terminal to be tested is connected to the matching test antenna, and the antenna is installed on the antenna control turntable in the full radio wave darkroom, and the calibrated RDSS / RNSS (Radio Determination Satellite Service / Radio Navigation Satellite Service) antenna is fixed at a distance greater than 3 meters, and the darkroom evaluation test is carried out through the Beidou navigation simulator platform, such as Figure 1 shown.

[0003] The laboratory darkroom test method is generally used for R&D identification testing and network certification testing. The production test uses the laboratory darkroom test, which has the following problems:

[0004] 1. The cost of a fully anechoic chamber is high. Building or renting a fully anechoic chamber will result in high production costs.

[0005] 2. It needs to be tested in a fully anechoic chamber. The test environment is complex and requires special personnel to operate. If the test is outsourced, production transportation, test arrangements, etc. will make production testing inconvenient;

[0006] 3. There are too many uncontrollable factors in the arrangement of outsourcing tests, which is not conducive to production planning and scheduling. If repair rework occurs, it will lead to a long production cycle and low production test efficiency;

[0007] 4. The test index is the BDU (Baseband Distribution Unit, Beidou transceiver unit terminal) + BDA (Beidou Antenna, Beidou antenna outside the aircraft cabin) complete system index. If there is a defect in the BDU, but the performance reduction does not exceed the amplification gain of the BDA, the production test cannot intercept the problem. It may cause performance degradation or unqualified performance after installation on the aircraft (poor interchangeability). Summary of the invention

[0008] The purpose of the present invention is to provide a Beidou short message terminal testing device and method. This scheme adopts wired mode testing, which reduces costs, and the testing scheme is simple and can be operated without professionals. It can also perform production testing on the performance indicators of the baseband, improve the accuracy of aircraft component testing, and facilitate the maintenance of aircraft components.

[0009] In order to solve the above technical problems, the present invention provides a Beidou short message terminal test device, comprising:

[0010] A controller and a Beidou simulator connected to the controller; wherein the controller is used to control the Beidou simulator to broadcast Beidou satellite signals within a first preset power range, determine the ability of the baseband in the Beidou transceiver unit terminal to receive the Beidou satellite signals according to the three-dimensional accuracy of the Beidou transceiver unit terminal transmission, and determine the ability of the baseband in the Beidou transceiver unit terminal to transmit short message signals according to the data demodulated signal transmitted by the Beidou RDSS inbound receiver;

[0011] A circulator, the circulator is connected to the DC block and the Beidou simulator respectively, and is used to transmit the Beidou satellite signal to the Beidou transceiver unit terminal through the DC block;

[0012] The DC isolator is connected to the Beidou transceiver unit terminal and is used to isolate the DC voltage component in the short message signal transmitted by the Beidou transceiver unit terminal, and transmit the isolated short message signal to the circulator;

[0013] The Beidou transceiver unit terminal, the baseband in the Beidou transceiver unit terminal is respectively connected to the controller and the DC isolator, and is used to transmit the three-dimensional accuracy value of the received Beidou satellite signal to the controller after receiving the Beidou satellite signal, and control the baseband to transmit the short message signal to the DC isolator based on the isolated Beidou satellite signal and the standard Beidou command transmitted by the controller;

[0014] The attenuator is connected to the circulator and is used to receive the isolated short message signal transmitted by the circulator and limit the power of the isolated short message signal to a second preset power range;

[0015] The Beidou RDSS inbound receiver is connected to the attenuator, and is used to perform data demodulation on the short message signal after power limitation, and transmit the demodulated signal to the controller.

[0016] Optionally, the controller includes:

[0017] An evaluation test module, the evaluation test module is connected to the Beidou signal simulation module and is used to send a call signal to the Beidou signal simulation module;

[0018] The Beidou signal simulation module is connected to the Beidou simulator and is used to control the Beidou simulator to broadcast the Beidou satellite signal after receiving the calling signal.

[0019] Optionally, the received signal bit error rate of the Beidou transceiver unit terminal is not greater than a preset bit error rate.

[0020] Optionally, the reverse transmission isolation of the circulator is not less than a preset isolation.

[0021] Optionally, the controller is specifically used to:

[0022] Determining whether the three-dimensional accuracy is within a preset three-dimensional accuracy range;

[0023] If it is within the preset three-dimensional accuracy range, it is determined that the baseband's ability to receive the Beidou satellite signal is normal;

[0024] If it is not within the preset three-dimensional accuracy range, it is determined that the baseband's ability to receive the Beidou satellite signal is abnormal.

[0025] Optionally, the controller is specifically used to:

[0026] Determining a carrier level of a demodulated signal of data transmitted by the BeiDou RDSS inbound receiver;

[0027] Determining whether the carrier level is within a preset level range;

[0028] If it is within the preset level range, it is determined that the ability of the baseband to transmit the short message signal is normal;

[0029] If it is not within the preset level range, it is determined that the ability of the baseband to transmit short message signals is abnormal.

[0030] Optionally, the controller is specifically used to:

[0031] Determine the actual number of demodulated signals transmitted by the BeiDou RDSS inbound receiver received within a preset time;

[0032] Determine the actual communication success rate of the baseband transmitting short message signal based on the actual number and the reference number;

[0033] Determining whether the actual communication success rate is not less than a preset communication success rate;

[0034] If it is less than the preset communication success rate, it is determined that the ability of the baseband to transmit short message signals is abnormal;

[0035] If it is not less than the preset communication success rate, it is determined that the baseband's ability to transmit short message signals is normal.

[0036] Optionally, the Beidou RDSS inbound receiver is an RDSS inbound receiver comprising a plurality of arrays, wherein different arrays in the RDSS inbound receiver are respectively connected to different attenuators.

[0037] Optionally, also include:

[0038] A router is connected to the controller and the Beidou RDSS inbound receiver respectively, and is used for receiving a demodulated data signal transmitted by the Beidou RDSS inbound receiver, and transmitting the demodulated data signal to the controller.

[0039] In order to solve the above technical problems, the present invention also provides a Beidou short message terminal test method, which is applied to a Beidou short message terminal test device, wherein the Beidou short message terminal test device includes a controller, a Beidou simulator, a circulator, a DC block, a Beidou transceiver unit terminal, an attenuator and a Beidou RDSS inbound receiver; wherein the method includes:

[0040] The controller controls the Beidou simulator to broadcast Beidou satellite signals within a first preset power range, determines the ability of the baseband in the Beidou transceiver unit terminal to receive the Beidou satellite signals according to the three-dimensional accuracy of the Beidou transceiver unit terminal transmission, and determines the ability of the baseband in the Beidou transceiver unit terminal to transmit short message signals according to the demodulated data signal transmitted by the Beidou RDSS inbound receiver;

[0041] The Beidou satellite signal is transmitted to the Beidou transceiver unit terminal through the circulator and the DC block;

[0042] Isolating the DC voltage component in the short message signal transmitted by the Beidou transceiver unit terminal through the DC isolator, and transmitting the isolated short message signal to the circulator;

[0043] After receiving the Beidou satellite signal, the Beidou transceiver unit terminal transmits the three-dimensional accuracy value of the received Beidou satellite signal to the controller, and controls the baseband to transmit the short message signal to the DC isolator based on the isolated Beidou satellite signal and the standard Beidou command transmitted by the controller;

[0044] receiving the isolated short message signal transmitted by the circulator through the attenuator, and limiting the power of the isolated short message signal to a second preset power range;

[0045] The Beidou RDSS inbound receiver performs data demodulation on the short message signal after power limitation, and transmits the demodulated signal to the controller.

[0046] The invention discloses a Beidou short message terminal testing device and method. A controller controls a Beidou simulator to broadcast Beidou satellite signals and transmits the signals to a Beidou transceiver unit terminal through a circulator and a DC isolator. The controller determines the ability of the baseband to receive Beidou satellite signals based on the three-dimensional accuracy of the Beidou transceiver unit terminal transmission. The Beidou transceiver unit terminal transmits short message signals based on Beidou satellite signals and standard Beidou instructions and sequentially passes through a DC isolator, a circulator and an attenuator to isolate the DC voltage component in the short message signal, and limits the power of the isolated short message signal within a preset power range. The Beidou RDSS inbound receiver performs data demodulation, and the controller determines the ability of the baseband to transmit short message signals. The scheme adopts wired mode testing, reduces costs, and has a simple testing scheme, thereby improving the accuracy of aircraft component testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0048] Figure 1 A schematic diagram of a darkroom evaluation test of a Beidou navigation simulator platform provided by the present invention;

[0049] Figure 2 A schematic structural diagram of a Beidou short message terminal test device provided by the present invention;

[0050] Figure 3 A schematic diagram of the structure of a mechanical Beidou position tracking device provided by the present invention;

[0051] Figure 4 A structural schematic diagram of another Beidou short message terminal testing device provided by the present invention;

[0052] Figure 5 A schematic diagram of the production test of a 4-array Beidou RDSS inbound receiver provided by the present invention;

[0053] Figure 6 A process flow chart of a Beidou short message terminal testing method provided by the present invention. DETAILED DESCRIPTION

[0054] The core of the present invention is to provide a Beidou short message terminal testing device and method. This scheme adopts wired mode testing, which reduces costs, and the testing scheme is simple and can be operated without professionals. It can also perform production testing on the performance indicators of the baseband, improve the accuracy of aircraft component testing, and facilitate the maintenance of aircraft components.

[0055] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] Please refer to Figure 2 , Figure 2 A schematic diagram of the structure of a Beidou short message terminal test device provided by the present invention. The device comprises:

[0057] A controller 1 and a Beidou simulator 2 connected to the controller 1; wherein the controller 1 is used to control the Beidou simulator 2 to broadcast Beidou satellite signals within a first preset power range, to judge the ability of the baseband in the Beidou transceiver unit terminal 5 to receive Beidou satellite signals according to the three-dimensional accuracy transmitted by the Beidou transceiver unit terminal 5, and to judge the ability of the baseband in the Beidou transceiver unit terminal 5 to transmit short message signals according to the demodulated signal transmitted by the Beidou RDSS inbound receiver 7;

[0058] A circulator 3, the circulator 3 is connected to the DC block 4 and the Beidou simulator 2 respectively, and is used to transmit the Beidou satellite signal to the Beidou transceiver unit terminal 5 through the DC block 4;

[0059] A DC isolator 4, which is connected to the Beidou transceiver unit terminal 5 and is used to isolate the DC voltage component in the short message signal transmitted by the Beidou transceiver unit terminal 5, and transmit the isolated short message signal to the circulator 3;

[0060] A Beidou transceiver unit terminal 5, wherein the baseband in the Beidou transceiver unit terminal 5 is respectively connected to the controller 1 and the DC isolator 4, and is used for transmitting the three-dimensional accuracy value of the received Beidou satellite signal to the controller 1 after receiving the Beidou satellite signal, and controlling the baseband to transmit a short message signal to the DC isolator 4 based on the isolated Beidou satellite signal and the standard Beidou command transmitted by the controller 1;

[0061] an attenuator 6, the attenuator 6 being connected to the circulator 3 and being used for receiving the isolated short message signal transmitted by the circulator 3 and limiting the power of the isolated short message signal to within a second preset power range;

[0062] Beidou RDSS inbound receiver 7, Beidou RDSS inbound receiver 7 is connected to attenuator 6, and is used for demodulating the short message signal after power limitation, and transmitting the demodulated signal to controller 1.

[0063] In the present invention, in order to test the Beidou transceiver unit terminal 5, the controller 1, the Beidou simulator 2, the circulator 3, the DC isolator 4, the Beidou transceiver unit terminal 5, the attenuator 6 and the Beidou RDSS inbound receiver 7 are connected by wire to form a wired test environment, wherein the controller 1 controls the Beidou simulator 2 to broadcast the Beidou satellite signal within the first preset power range, and the Beidou satellite signal is transmitted to the Beidou transceiver unit terminal 5 through the circulator 3 and the DC isolator 4. After receiving the Beidou satellite signal, the Beidou transceiver unit terminal 5 transmits the three-dimensional accuracy of the received Beidou satellite signal to the controller 1, so that the controller 1 can judge the baseband of the Beidou transceiver unit terminal 5 based on this part of the three-dimensional accuracy. In addition, after receiving the standard Beidou command transmitted by the controller 1, the Beidou transceiver unit terminal 5 will control its own baseband based on the isolated Beidou satellite signal and the standard Beidou command transmitted by the controller 1. The corresponding short message signal is transmitted to the DC isolator 4 so that the DC isolator 4 isolates the DC voltage component of the short message signal, and transmits the isolated short message signal to the attenuator 6 through the circulator 3, wherein the attenuator 6 limits the power of the isolated short message signal to the second preset power range, and transmits the attenuated short message signal to the Beidou RDSS inbound receiver 7, and the Beidou RDSS inbound receiver 7 demodulates the short message signal after power limitation, and transmits the demodulated signal to the controller 1, so that the controller 1 judges the ability of the baseband in the Beidou transceiver unit terminal 5 to transmit the short message signal according to the demodulated signal transmitted by the Beidou RDSS inbound receiver 7. This scheme adopts wired mode testing, does not require a darkroom environment, does not customize the development of instruments, and adopts general shelf instruments, which reduces costs, and the test scheme is simple, and can be operated without professionals, which is suitable for production personnel to work according to operating procedures after on-the-job training. It can also perform production testing on the performance of the baseband, improve the accuracy of aircraft component testing, and facilitate aircraft component maintenance.

[0064] It should be noted that the baseband in the Beidou transceiver unit terminal 5 is the BDU baseband, that is, the present application realizes the index testing of the BDU after disassembly, solves the problem of high cost and low efficiency of darkroom testing in production testing, and also solves the problem that the BDU+BDA combination system passes the test due to defects in a single BDU.

[0065] It should also be noted that the Beidou short message terminal test device provided in this application is generally used on aircraft, and the airborne Beidou position tracking equipment generally includes: Beidou antenna, Beidou RDSS / RNSS terminal, aircraft power system, aircraft airborne system, debugging equipment, GSE (GENE EXPRESSION OMNIBUS, a database), wherein the Beidou antenna includes a passive antenna and an active antenna, and the Beidou EDSS / RNSS terminal includes a power module, an integrated processing module, an RDSS_RNSS module, an aircraft identity information module, and an interface indication module. The specific structure is as follows Figure 3 shown.

[0066] It should also be noted that the Beidou simulator 2 generally uses GNS8230: compatible with the Beidou II and Beidou III satellite signal simulation capabilities, with RNSS frequency points B1I / B1C, RDSS outbound frequency points S1 / S2c / B2b, and supports static and dynamic trajectory simulation, pseudo-range fixation, speed fixation, and acceleration fixation and other scene simulation functions. The Beidou RDSS inbound receiver 7 generally adopts a 4-array form: it has a 4-array inbound capability, supports the frequency points LF0 / Lf1 / Lf2 / Lf4, can receive and process the user equipment's sudden inbound signals, has the functions of capturing, tracking, ranging and data demodulation of inbound signals, and can measure the Doppler changes of the transmitted signals of the user's dynamic situation. Test control computer (controller 1): simulates and controls the Beidou simulator 2 GNS8230 and Beidou RDSS inbound receiver 7 through the human-computer interaction interface and conducts test evaluation. Evaluation test software & Beidou signal simulation software: Matching Beidou simulator 2GNS8230 and Beidou RDSS inbound receiver 7, all provided by other Beidou navigation signal simulator manufacturers. Circulator 3: Divert and isolate Beidou outbound signals and Beidou inbound signals. RF signals can only be transmitted from 1→2, 2→3, 3→1 (not reversed), and the reverse transmission isolation should not be less than 60dB. Attenuator 6: Control the inbound signal power, protect Beidou RDSS inbound receiver 7, and control the inbound power within the range required by Beidou RDSS inbound receiver 7. DC isolator 4: isolates the DC voltage component in the signal. In addition, each device is connected through RF line, serial line and network cable. For example, Beidou transceiver unit terminal 5 is connected to controller 1 through a serial line, the router is connected to controller 1, Beidou RDSS inbound receiver 7 and Beidou simulator 2 are connected with a network cable, and other components such as Beidou RDSS inbound receiver 7 and attenuator 6, DC isolator 4 and Beidou transceiver unit terminal 5, etc. are connected through RF line.

[0067] It should also be noted that the test control computer runs the evaluation test software and Beidou signal simulation software, and calls the Beidou signal simulation software through the human-computer interaction interface of the evaluation test software. The Beidou simulator 2GNS8230 is controlled through the network cable to broadcast the Beidou satellite signal. The satellite signal passes through the circulator 3 and the DC isolator 4 to reach the BDU receiving port. The test control computer interacts with the baseband of the BDU to be tested through a serial port tool (such as a serial port assistant), and reads information and controls the baseband through standard Beidou instructions. The test control computer controls the BDU baseband to transmit a short message signal, which passes through the DC isolator 4, the circulator 3, and the attenuator 6 to the Beidou RDSS inbound receiver 7. The inbound receiver captures the signal, performs data demodulation, and feeds it back to the test control computer evaluation test software through the network cable. The evaluation test software automatically performs performance testing. The entire test process is as follows: Figure 4 During production testing, the single terminal device composed of BDU and BDA according to the system index requirements of CTSO-2C604A can be decomposed and tested separately according to the designed BDA and BDU indicators.

[0068] It should also be noted that the Beidou simulator 2 broadcasts the Beidou satellite signal within the first preset power range in order to meet the power requirement of the Beidou transceiver unit terminal 5, and the attenuator 6 limits the power of the isolated short message signal to the second preset power range in order to meet the power requirement of the Beidou RDSS inbound receiver 7. The specific values ​​of the first preset power range and the second preset power range are determined by actual conditions, and the present invention is not particularly limited herein.

[0069] This embodiment provides a Beidou short message terminal testing device, in which the controller 1 controls the Beidou simulator 2 to broadcast Beidou satellite signals within a first preset power range, and transmits the Beidou satellite signals to the Beidou transceiver unit terminal 5 through the circulator 3 and the DC isolator 4, and the Beidou transceiver unit terminal 5 transmits the three-dimensional accuracy of the received Beidou satellite signal to the controller 1, so that the controller 1 determines the baseband receiving Beidou satellite signal capability of the Beidou transceiver unit terminal 5 based on the three-dimensional accuracy. In addition, the baseband in the Beidou transceiver unit terminal 5 will transmit a corresponding short message signal to the DC isolator 4 based on the Beidou satellite signal and the standard Beidou command transmitted by the controller 1, and transmit the isolated short message signal to the attenuator 6 through the circulator 3 to limit the power of the isolated short message signal to a second preset power range, and then the Beidou RDSS inbound receiver 7 will perform data demodulation on the short message signal after power limitation, and finally the controller 1 will judge the ability of the baseband of the Beidou transceiver unit terminal 5 to transmit short message signals. This solution adopts wired mode testing, which reduces costs, and the testing solution is simple and can be operated without professionals, which improves the accuracy of aircraft component testing and facilitates aircraft component maintenance.

[0070] As an optional embodiment, the controller 1 includes:

[0071] An evaluation test module, the evaluation test module is connected to the Beidou signal simulation module and is used to send a call signal to the Beidou signal simulation module;

[0072] Beidou signal simulation module, the Beidou signal simulation module is connected to Beidou simulator 2, and is used to control Beidou simulator 2 to broadcast Beidou satellite signals after receiving a call signal.

[0073] In the present invention, the controller 1 includes an evaluation test module and a Beidou signal simulation module, wherein the evaluation test module sends a call signal to the Beidou signal simulation module, and after receiving the call signal, the Beidou signal simulation module controls the Beidou simulator 2 to broadcast the Beidou satellite signal, thereby ensuring the integrity of the solution.

[0074] It should be noted that, in actual applications, the evaluation test module includes a human-computer interaction interface. The controller 1 will run the software in the evaluation test module and the Beidou signal simulation module, and call the Beidou signal simulation module through the human-computer interaction interface of the evaluation test module.

[0075] As an optional embodiment, the bit error rate of the received signal of the Beidou transceiver unit terminal 5 is not greater than a preset bit error rate.

[0076] In the present invention, the bit error rate of the received signal of the Beidou transceiver unit terminal 5 is not greater than the preset bit error rate, thereby improving the ability to capture satellite signals and the accuracy of the solution.

[0077] As an optional embodiment, the reverse transmission isolation of the circulator 3 is not less than a preset isolation.

[0078] In the present invention, the reverse transmission isolation of the circulator 3 is not less than the preset isolation, thereby improving the effect of shunting and isolating the Beidou outbound signal and the Beidou inbound signal.

[0079] It should be noted that, in practical applications, the preset isolation degree may be 60Db or other values.

[0080] As an optional embodiment, the controller 1 is specifically configured to:

[0081] Determine whether the three-dimensional accuracy is within a preset three-dimensional accuracy range;

[0082] If it is within the preset three-dimensional accuracy range, it is determined that the baseband's ability to receive Beidou satellite signals is normal;

[0083] If it is not within the preset three-dimensional accuracy range, it is determined that the baseband's ability to receive Beidou satellite signals is abnormal.

[0084] In the present invention, the controller 1 can determine whether the baseband's ability to receive Beidou satellite signals is normal by determining whether the three-dimensional accuracy is within a preset three-dimensional accuracy range. If the three-dimensional accuracy is within the preset three-dimensional accuracy range, the baseband's ability to receive Beidou satellite signals is determined to be normal; conversely, if the three-dimensional accuracy is not within the preset three-dimensional accuracy range, the baseband's ability to receive Beidou satellite signals is determined to be abnormal, thereby making an accurate judgment on the baseband's ability to receive Beidou satellite signals in the Beidou transceiver unit terminal 5.

[0085] As an optional embodiment, the controller 1 is specifically configured to:

[0086] Determine the carrier level of the demodulated signal of the data transmitted by the Beidou RDSS inbound receiver 7;

[0087] Determine whether the carrier level is within a preset level range;

[0088] If it is within the preset level range, it is determined that the baseband's ability to transmit short message signals is normal;

[0089] If it is not within the preset level range, it is determined that the baseband's ability to transmit short message signals is abnormal.

[0090] In the present invention, the specific process by which the controller 1 can judge the ability of the baseband to transmit short message signals in the Beidou transceiver unit terminal 5 according to the demodulated signal of the data transmitted by the Beidou RDSS inbound receiver 7 is as follows: first determine the carrier level of the signal transmitted by the Beidou RDSS inbound receiver 7, and then judge whether the carrier level is within the preset level range. If it is within the preset level range, it is judged that the ability of the baseband to transmit short message signals is normal; otherwise, if it is not within the preset level range, it is judged that the ability of the baseband to transmit short message signals is abnormal, and an accurate judgment is made on the ability of the baseband to transmit short message signals in the Beidou transceiver unit terminal 5.

[0091] It should be noted that, in practical applications, the preset level range may be 7dB±1dB or other values, and the present invention does not make any special limitation thereto.

[0092] As an optional embodiment, the controller 1 is specifically configured to:

[0093] Determine the actual number of demodulated signals transmitted by the Beidou RDSS inbound receiver 7 received within a preset time;

[0094] Determine the actual communication success rate of the baseband transmission short message signal based on the actual number and the reference number;

[0095] Determining whether the actual communication success rate is not less than the preset communication success rate;

[0096] If it is less than the preset communication success rate, it is determined that the baseband's ability to transmit short message signals is abnormal;

[0097] If it is not less than the preset communication success rate, it is determined that the baseband's ability to transmit short message signals is normal.

[0098] In the present invention, the specific process by which the controller 1 can judge the ability of the baseband to transmit short message signals in the Beidou transceiver unit terminal 5 according to the demodulated data signal transmitted by the Beidou RDSS inbound receiver 7 is as follows: first determine the actual number of demodulated data signals transmitted by the Beidou RDSS inbound receiver 7 received within a preset time, then determine the actual communication success rate of the baseband to transmit short message signals based on the actual number and the reference number, and finally judge whether the actual communication success rate is not less than the preset communication success rate. If it is less than the preset communication success rate, it is determined that the ability of the baseband to transmit short message signals is abnormal; otherwise, if it is not less than the preset communication success rate, it is determined that the ability of the baseband to transmit short message signals is normal, and an accurate judgment is made on the ability of the baseband to transmit short message signals in the Beidou transceiver unit terminal 5.

[0099] It should be noted that, in practical applications, the preset communication success rate may be 95% or other values, and the present invention does not make any special limitation thereto.

[0100] As an optional embodiment, the Beidou RDSS inbound receiver 7 is an RDSS inbound receiver including a plurality of arrays, wherein different arrays in the RDSS inbound receiver are respectively connected to different attenuators 6 .

[0101] In the present invention, the Beidou RDSS inbound receiver 7 is an RDSS inbound receiver comprising a plurality of arrays, that is, different arrays in the RDSS inbound receiver are respectively connected to different attenuators 6. Through its own plurality of arrays, a plurality of Beidou transceiver unit terminals 5 can be tested simultaneously, thereby improving production efficiency.

[0102] It should be noted that when the S carrier level of the BeiDou GEO satellite RDSS signal at the antenna input port is (antenna azimuth 0°~360°, elevation 60°~90°, dedicated segment 24kbps) not greater than -153.8dBW (-123.8dBm), the BeiDou transceiver unit terminal 5 should be able to capture the satellite signal, and the single-branch receiving signal bit error rate should not be greater than 1×10 -5. Since the CTSO-2C604A standard index requirements are indicators tested in a standard darkroom, and the azimuth angle of 0° to 360° and the elevation angle of 60° to 90° are antenna index requirements, if the matching designed BDA (antenna) index gain is not less than 20dB (azimuth angle of 0° to 360°, elevation angle of 60° to 90°), then during the production test, the RDSS signal S carrier level of the BDU entrance plane is -103.8dBm. Considering the 3dB margin, the BDU entrance plane -106.8dBm test is passed during production, which means that the standard -123.8dBm requirement can be met when equipped with a BDA antenna.

[0103] It should also be noted that, due to the use of Beidou RDSS inbound receiver 7 (4 arrays), 4 BDUs can be tested simultaneously to improve production efficiency. However, the serial port of each BDU needs to be bound to the inbound port of Beidou RDSS inbound receiver 7 one by one. For the inbound LF0 / Lf1 / Lf2 / Lf4 frequency points, the inbound signal is divided into 4 by the power divider and enters the Beidou RDSS inbound receiver 7. The outbound signal is also output by the power divider. The test wiring principle is as follows: Figure 5 shown.

[0104] It should also be noted that the simulator model GNS8230 and Beidou RDSS inbound receiver 7 in this solution can use other suitable models (with corresponding automatic test and evaluation software). This solution can be extended to the production test of the performance indicators of the Beidou RDSS / RNSS terminal unit with active antennas using the "one-line" connection mode between BDU and BDA in the Beidou short message terminal system.

[0105] As an optional embodiment, it also includes:

[0106] The router is connected to the controller 1 and the Beidou RDSS inbound receiver 7 respectively, and is used to receive the demodulated data signal transmitted by the Beidou RDSS inbound receiver 7, and transmit the demodulated data signal to the controller 1.

[0107] In the present invention, a router is also provided in the Beidou short message terminal test device. The router can receive the demodulated data signal transmitted by the Beidou RDSS inbound receiver 7, and transmit the demodulated data signal to the controller 1. The application of the router can greatly improve the communication speed, reduce the communication load, and enhance the security of communication.

[0108] Please refer to Figure 6 , Figure 6A process flow chart of a Beidou short message terminal test method provided by the present invention. Applied to a Beidou short message terminal test device, the Beidou short message terminal test device includes a controller 1, a Beidou simulator 2, a circulator 3, a DC block 4, a Beidou transceiver unit terminal 5, an attenuator 6 and a Beidou RDSS inbound receiver 7; wherein the method includes:

[0109] S11: Control the Beidou simulator 2 to broadcast the Beidou satellite signal within the first preset power range through the controller 1, judge the ability of the baseband in the Beidou transceiver unit terminal 5 to receive the Beidou satellite signal according to the three-dimensional accuracy transmitted by the Beidou transceiver unit terminal 5, and judge the ability of the baseband in the Beidou transceiver unit terminal 5 to transmit the short message signal according to the demodulated signal transmitted by the Beidou RDSS inbound receiver 7;

[0110] S12: The Beidou satellite signal is transmitted to the Beidou transceiver unit terminal 5 through the circulator 3 and the DC block 4;

[0111] S13: isolating the DC voltage component in the short message signal transmitted by the Beidou transceiver unit terminal 5 through the DC isolator 4, and transmitting the isolated short message signal to the circulator 3;

[0112] S14: After receiving the Beidou satellite signal, the Beidou transceiver unit terminal 5 transmits the three-dimensional accuracy value of the received Beidou satellite signal to the controller 1, and controls the baseband to transmit a short message signal to the isolator 4 based on the isolated Beidou satellite signal and the standard Beidou command transmitted by the controller 1.

[0113] S15: receiving the isolated short message signal transmitted by the circulator 3 through the attenuator 6, and limiting the power of the isolated short message signal to a second preset power range;

[0114] S16: The Beidou RDSS inbound receiver 7 performs data demodulation on the short message signal after power limitation, and transmits the demodulated signal to the controller 1.

[0115] The Beidou short message terminal testing method provided in this embodiment corresponds to the above-mentioned device, so it has the same beneficial effects as the above-mentioned device. Therefore, for the embodiment of the Beidou short message terminal testing method, please refer to the description of the embodiment of the device part, which will not be repeated here.

[0116] It should be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0117] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A Beidou short message terminal test device, It is characterized in that include: A controller and a Beidou simulator connected to the controller; wherein the controller is used to control the Beidou simulator to broadcast Beidou satellite signals within a first preset power range, determine the ability of the baseband in the Beidou transceiver unit terminal to receive the Beidou satellite signals according to the three-dimensional accuracy of the Beidou transceiver unit terminal transmission, and determine the ability of the baseband in the Beidou transceiver unit terminal to transmit short message signals according to the data demodulated signal transmitted by the Beidou RDSS inbound receiver; A circulator, the circulator is connected to the DC block and the Beidou simulator respectively, and is used to transmit the Beidou satellite signal to the Beidou transceiver unit terminal through the DC block; The DC isolator is connected to the Beidou transceiver unit terminal and is used to isolate the DC voltage component in the short message signal transmitted by the Beidou transceiver unit terminal, and transmit the isolated short message signal to the circulator; The Beidou transceiver unit terminal, the baseband in the Beidou transceiver unit terminal is respectively connected to the controller and the DC isolator, and is used to transmit the three-dimensional accuracy value of the received Beidou satellite signal to the controller after receiving the Beidou satellite signal, and control the baseband to transmit the short message signal to the DC isolator based on the isolated Beidou satellite signal and the standard Beidou command transmitted by the controller; The attenuator is connected to the circulator and is used to receive the isolated short message signal transmitted by the circulator and limit the power of the isolated short message signal to a second preset power range; The Beidou RDSS inbound receiver is connected to the attenuator, and is used to perform data demodulation on the short message signal after power limitation, and transmit the demodulated signal to the controller.

2. The Beidou short message terminal testing device as claimed in claim 1, It is characterized in that The controller comprises: An evaluation test module, the evaluation test module is connected to the Beidou signal simulation module and is used to send a call signal to the Beidou signal simulation module; The Beidou signal simulation module is connected to the Beidou simulator and is used to control the Beidou simulator to broadcast the Beidou satellite signal after receiving the calling signal.

3. The Beidou short message terminal testing device as claimed in claim 1, It is characterized in that The bit error rate of the received signal of the Beidou transceiver unit terminal is not greater than the preset bit error rate.

4. The Beidou short message terminal testing device as claimed in claim 1, It is characterized in that The reverse transmission isolation of the circulator is not less than a preset isolation.

5. The Beidou short message terminal testing device as claimed in claim 1, It is characterized in that The controller is specifically used for: Determining whether the three-dimensional accuracy is within a preset three-dimensional accuracy range; If it is within the preset three-dimensional accuracy range, it is determined that the baseband's ability to receive the Beidou satellite signal is normal; If it is not within the preset three-dimensional accuracy range, it is determined that the baseband's ability to receive the Beidou satellite signal is abnormal.

6. The Beidou short message terminal testing device as claimed in claim 1, It is characterized in that The controller is specifically used for: Determining a carrier level of a demodulated signal of data transmitted by the BeiDou RDSS inbound receiver; Determining whether the carrier level is within a preset level range; If it is within the preset level range, it is determined that the ability of the baseband to transmit the short message signal is normal; If it is not within the preset level range, it is determined that the ability of the baseband to transmit short message signals is abnormal.

7. The Beidou short message terminal testing device according to claim 1, It is characterized in that The controller is specifically used for: Determine the actual number of demodulated signals transmitted by the BeiDou RDSS inbound receiver received within a preset time; Determine the actual communication success rate of the baseband transmitting short message signal based on the actual number and the reference number; Determining whether the actual communication success rate is not less than a preset communication success rate; If it is less than the preset communication success rate, it is determined that the ability of the baseband to transmit short message signals is abnormal; If it is not less than the preset communication success rate, it is determined that the baseband's ability to transmit short message signals is normal.

8. The Beidou short message terminal testing device as claimed in claim 1, It is characterized in that The Beidou RDSS inbound receiver is an RDSS inbound receiver comprising a plurality of arrays, wherein different arrays in the RDSS inbound receiver are respectively connected to different attenuators.

9. The Beidou short message terminal testing device according to any one of claims 1 to 8, It is characterized in that Also includes: A router is connected to the controller and the Beidou RDSS inbound receiver respectively, and is used for receiving a demodulated data signal transmitted by the Beidou RDSS inbound receiver, and transmitting the demodulated data signal to the controller.

10. A Beidou short message terminal testing method, It is characterized in that Applied to a Beidou short message terminal test device, the Beidou short message terminal test device includes a controller, a Beidou simulator, a circulator, a DC block, a Beidou transceiver unit terminal, an attenuator and a Beidou RDSS inbound receiver; wherein the method includes: The controller controls the Beidou simulator to broadcast Beidou satellite signals within a first preset power range, determines the ability of the baseband in the Beidou transceiver unit terminal to receive the Beidou satellite signals according to the three-dimensional accuracy of the Beidou transceiver unit terminal transmission, and determines the ability of the baseband in the Beidou transceiver unit terminal to transmit short message signals according to the demodulated data signal transmitted by the Beidou RDSS inbound receiver; The Beidou satellite signal is transmitted to the Beidou transceiver unit terminal through the circulator and the DC block; Isolating the DC voltage component in the short message signal transmitted by the Beidou transceiver unit terminal through the DC isolator, and transmitting the isolated short message signal to the circulator; After receiving the Beidou satellite signal, the Beidou transceiver unit terminal transmits the three-dimensional accuracy value of the received Beidou satellite signal to the controller, and controls the baseband to transmit the short message signal to the DC isolator based on the isolated Beidou satellite signal and the standard Beidou command transmitted by the controller; receiving the isolated short message signal transmitted by the circulator through the attenuator, and limiting the power of the isolated short message signal to a second preset power range; The Beidou RDSS inbound receiver performs data demodulation on the short message signal after power limitation, and transmits the demodulated signal to the controller.

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