Precision test equipment of GNSS signal timing device
By using a power divider and clock difference comparison device in the accuracy testing equipment of GNSS signal timing devices, synchronous testing of multiple GNSS signal timing devices was achieved, solving the problem of low testing efficiency in the existing technology, improving testing efficiency and reducing costs.
Patent Information
- Application Number
- CN202422672772.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-11-04
AI Technical Summary
Existing GNSS signal timing device accuracy testing equipment can only test one device at a time, resulting in low testing efficiency.
A power divider is used to divide the single signal output from the GNSS analog signal device into multiple signals. The power divider and clock difference comparison device are used to achieve synchronous testing of multiple GNSS signal timing devices. The number of tests can be flexibly set in combination with the control device.
It improves the testing efficiency of GNSS signal timing devices, reduces testing costs, enables accurate testing of multiple devices, and meets the needs of various scenarios.
Smart Images
Figure CN223808648U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electronic equipment test technical field, concretely provides a precision test equipment of GNSS signal time service device. BACKGROUND
[0002] GNSS time service refers to the technology of using accurate time information provided by global navigation satellite system to carry out time synchronization, is one of the key components of modern information technology infrastructure, provides reliable time reference for various trades, supports many services and applications that depend on high-precision time synchronization.
[0003] GNSS signal time service device provides time service for related equipment through receiving satellite navigation signal and outputting time pulse signal in real time, so the precision of GNSS signal time service device is extremely important.At present, the precision test equipment of GNSS signal time service device can only test one GNSS signal time service device at the same time, cannot realize the precision of multiple GNSS signal time service devices at the same time, greatly influences the test efficiency. UTILITY MODEL CONTENT
[0004] In order to solve the problem of low precision test efficiency of GNSS signal time service device in the prior art, the utility model provides a precision test equipment of GNSS signal time service device, which can test the precision of multiple GNSS signal time service devices at the same time, and improves the test efficiency.
[0005] The further application purpose of the utility model is to provide a GNSS signal time service device, the precision test equipment of which is provided with a power divider device, divides the signal output by the GNSS simulation signal device into multiple signals evenly, can test the precision of multiple GNSS signal time service devices synchronously, improves the test efficiency, and can also flexibly set the test times through the control device, meets the demand of various scenes.
[0006] The specific scheme of the utility model is as follows.
[0007] A precision test equipment of GNSS signal time service device, comprising a GNSS simulation signal device, the output end of the GNSS simulation signal device is connected with a power divider device and a clock difference comparison device respectively, and a GNSS signal time service device is connected between the power divider device and the clock difference comparison device.
[0008] The GNSS simulation signal device is a device that can simulate real satellite navigation signals in the sky, and provides a GNSS signal timing device for positioning and outputting high-precision time pulse signals; the output end of the GNSS simulation signal device is connected to the input end of the power divider device and the input end of the clock difference comparison device respectively, and synchronously outputs signals to the power divider device and the clock difference comparison device. The power divider device is a device that divides one signal into multiple signals, for example, n signals, and the power divider device has n output ends, and at most can simultaneously connect n GNSS signal timing devices, that is, each output end is connected to a GNSS signal timing device, and outputs signals to the GNSS signal timing device. The GNSS signal timing device is a device that provides timing for related equipment by receiving satellite navigation signals and outputting time pulse signals in real time; the clock difference comparison device has n+1 input ends, the output ends of the n GNSS signal timing devices are connected to the n input ends of the clock difference comparison device respectively, and signals are output to the clock difference comparison device; the clock difference comparison device compares the signals received by the GNSS signal timing device with the signals of the GNSS simulation signal device, and outputs corresponding clock difference values.
[0009] The precision test equipment of the GNSS signal timing device of the utility model sets the power divider device, divides one signal output by the GNSS simulation signal device into multiple signals, can synchronously test the precision of multiple GNSS signal timing devices, and improves test efficiency.
[0010] As preferred, the power divider device is a four-power divider, and the four-power divider has four output ends. The four-power divider divides one signal output by the GNSS simulation signal device into four signals, and outputs the four signals through the four output ends.
[0011] As preferred, each output end of the four-power divider is connected to one GNSS signal timing device, that is, the four-power divider can simultaneously connect four GNSS signal timing devices, and divides the four signals into the four GNSS signal timing devices simultaneously.
[0012] As preferred, the clock difference comparison device has five input ends, and is connected to the output end of the GNSS simulation signal device and the output ends of the four GNSS signal timing devices respectively, the GNSS simulation signal device and the four GNSS signal timing devices output signals to the clock difference comparison device respectively, and the clock difference comparison device compares the signals received by the four GNSS signal timing devices with the signals of the GNSS simulation signal device, and outputs corresponding clock difference values.
[0013] As preferred, the GNSS analog signal device outputs the first GNSS analog signal to the power divider device, and outputs a reference pulse signal to the clock difference comparison device synchronously.
[0014] As preferred, the power divider device outputs multiple second GNSS analog signals to multiple GNSS signal time service devices, the GNSS analog signals being signals obtained by equally dividing the first GNSS analog signal.
[0015] As preferred, after receiving the second GNSS analog signals, the GNSS signal time service devices output corresponding time pulse signals to the clock difference comparison device through corresponding calculation.
[0016] As preferred, the clock difference comparison device compares the multiple time pulse signals received with the reference pulse signal, and the output end of the clock difference comparison device outputs the clock difference value of the time pulse signal and the reference pulse signal.
[0017] As preferred, the reference pulse signal and the time pulse signal are both second pulse signals occurring once per second.
[0018] As preferred, the output end of the clock difference comparison device is connected with a control device, and the control device outputs time service precision statistical results. The connections among the GNSS analog signal device, the power divider device, the GNSS signal time service device, the clock difference comparison device and the control device are cable connections. The control device can flexibly set the number of tests, receive the clock difference values of the preset number of tests, and generate the time service precision statistical results of the multiple GNSS signal time service devices respectively according to the clock difference values of the preset number of tests, so as to realize the precision test of the multiple GNSS signal time service devices at the same time.
[0019] Therefore, the utility model has the following beneficial effects:
[0020] The precision test equipment of the GNSS signal time service device of the utility model sets the power divider device, divides the signal output by the GNSS analog signal device into multiple signals, can test the precision of multiple GNSS signal time service devices synchronously, improves the test efficiency, and can flexibly set the number of tests through the control device, and meets the needs of various scenes. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only the embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained according to the provided drawings without paying the creative labor.
[0022] Figure 1 An embodiment structure block diagram of the precision test equipment of the GNSS signal time service device. DETAILED DESCRIPTION
[0023] The embodiments of the present application will be described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout, obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments, the embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as limiting the present application.
[0024] As Figure 1 An embodiment structure block diagram of the precision test equipment of the GNSS signal time service device. The GNSS signal time service device is a device for providing time service to related equipment by receiving satellite navigation signals and outputting time pulse signals in real time, and is widely used in various occasions requiring high-precision time synchronization, so it is necessary to achieve high-precision time service. The precision test equipment of the GNSS signal time service device is very important in terms of test efficiency on the basis of ensuring the reliability of time service precision test.
[0025] Embodiment one.
[0026] The precision test equipment of the GNSS signal time service device of the embodiment comprises a GNSS simulation signal device, a power divider device and a clock difference comparison device, and the connection between the GNSS simulation signal device, the power divider device, the GNSS signal time service device and the clock difference comparison device is a cable connection. The GNSS simulation signal device is a device that can simulate real satellite navigation signals in the sky and provide them to the GNSS signal time service device for positioning and outputting high-precision time pulse signals; the power divider device is a device for dividing one signal into multiple signals.
[0027] The output end of the GNSS analog signal device is connected to the input end of the power divider device and the input end of the clock difference comparison device, and the GNSS analog signal device synchronously outputs signals to the power divider device and the clock difference comparison device, and the GNSS signal timing device is connected between the power divider device and the clock difference comparison device. The power divider device is a device for dividing one signal into n signals, and the power divider device has n output ends, each of which is connected to a GNSS signal timing device, i.e. at most n GNSS signal timing devices can be connected simultaneously, which are GNSS signal timing device 1, GNSS signal timing device 2, GNSS signal timing device 3, …, GNSS signal timing device n. The power divider device divides the received signal of the GNSS analog signal device into n signals, and outputs them to the n GNSS signal timing devices through the n output ends. Each GNSS signal timing device has an output end, and the clock difference comparison device has n+1 input ends, which are IO1 interface, IO2 interface, IO3 interface, …, IOn interface and IO(n+1) interface, which are connected to the output ends of the n GNSS signal timing devices and the output end of the GNSS analog signal device, respectively, i.e. the IO1 interface of the clock difference comparison device is connected to the output end of the GNSS signal timing device 1, and receives the signal output by the GNSS signal timing device 1, the IO2 interface of the clock difference comparison device is connected to the output end of the GNSS signal timing device 2, and receives the signal output by the GNSS signal timing device 2, the IO3 interface of the clock difference comparison device is connected to the output end of the GNSS signal timing device 3, and receives the signal output by the GNSS signal timing device 3, the IOn interface of the clock difference comparison device is connected to the output end of the GNSS signal timing device n, and receives the signal output by the GNSS signal timing device n, and the IO(n+1) interface of the clock difference comparison device is connected to the output end of the GNSS analog signal device, and receives the signal output by the GNSS analog signal device. The clock difference comparison device compares the signals received by the n GNSS signal timing devices with the signal received by the GNSS analog signal device, obtains and outputs the corresponding clock difference value, which can be used as a judgment of the timing accuracy of the GNSS signal timing device.
[0028] The working principle of the precision test equipment of the GNSS signal timing device of the embodiment is as follows.
[0029] The GNSS analog signal device outputs a first GNSS analog signal to the input end of the power divider device, and outputs a reference pulse signal to the input end of the clock difference comparison device synchronously; the power divider device divides the received first GNSS analog signal into n second GNSS analog signals evenly, and outputs the second GNSS analog signals to n GNSS signal timing devices, GNSS signal timing device 1, GNSS signal timing device 2, GNSS signal timing device 3,..., GNSS signal timing device n respectively; after receiving the second GNSS analog signals, the GNSS signal timing devices output corresponding time pulse signals to the n input ends of the clock difference comparison device respectively; the reference pulse signal and the time pulse signal are both second pulse signals output once per second; after receiving the n time pulse signals of the GNSS signal timing device 1, GNSS signal timing device 2, GNSS signal timing device 3,..., GNSS signal timing device n and the reference pulse signal output by the GNSS analog signal device, the clock difference comparison device compares the n time pulse signals with the reference pulse signal provided by the GNSS analog signal device, obtains the clock difference value of the time pulse signal and the reference pulse signal, and outputs the clock difference value through the output end.
[0030] The precision test equipment of the GNSS signal timing device of the embodiment does not need to use a special high-precision atomic clock, thereby reducing the test cost, improving the test accuracy and test efficiency compared with the traditional manual test, and saving test resources; the power divider device is arranged to connect the output end of the GNSS analog signal device, divide the signal output by the GNSS analog signal device into n signals evenly, and output the n signals to the n GNSS signal timing devices through n output ends respectively, so that the precision of the n GNSS signal timing devices can be tested synchronously; compared with the equipment that can only test the precision of one GNSS signal timing device at a time, the embodiment improves the precision test efficiency of the GNSS signal timing device, thereby weakening the influence of the low test efficiency on the production efficiency of the GNSS signal timing device to a certain extent on the basis of ensuring the reliability of the precision test.
[0031] Embodiment two.
[0032] As Figure 1The embodiment structure block diagram of the precision test equipment of the GNSS signal time service device is shown.
[0033] The output end of the GNSS simulation signal device is connected with the input end of the four power divider and the input end of the clock difference comparison device respectively.
[0034] The clock difference comparison device has five input ends, which are IO1 interface, IO2 interface, IO3 interface, IO4 interface and IO5 interface respectively. Figure 1 The output end of the GNSS simulation signal device is connected with the input end of the four power divider and the input end of the clock difference comparison device respectively.
[0035] The working principle of the precision test equipment of the GNSS signal time service device is as follows.
[0036] The GNSS simulation signal device outputs a first GNSS simulation signal to the input end of the four power dividers, and synchronously outputs a reference pulse signal to the IO5 interface of the clock difference comparison device; the four power dividers evenly divide the received first GNSS simulation signal into four second GNSS simulation signals, which are simultaneously output to the four GNSS signal timing devices, namely GNSS signal timing device 1, GNSS signal timing device 2, GNSS signal timing device 3 and GNSS signal timing device 4; after receiving the second GNSS simulation signals, the GNSS signal timing devices output corresponding time pulse signals to the IO1 interface, the IO2 interface, the IO3 interface and the IO4 interface of the clock difference comparison device respectively; the reference pulse signal and the time pulse signal are both second pulse signals, which are output once per second; the clock difference comparison device compares the four time pulse signals received with the reference pulse signal provided by the GNSS simulation signal device, obtains the clock difference value of the time pulse signal and the reference pulse signal, and outputs the clock difference value to the control device through the output end; the control device can flexibly set the number of tests, receive the clock difference values of the preset number of tests, and generate the timing accuracy statistical results of GNSS signal timing device 1, GNSS signal timing device 2, GNSS signal timing device 3 and GNSS signal timing device 4 respectively according to the clock difference values of the preset number of tests, so as to realize the accuracy test of the four GNSS signal timing devices at the same time.
[0037] The precision test equipment of the GNSS signal timing device of the embodiment does not need to use a special high-precision atomic clock, thereby reducing the test cost, improving the test accuracy and the test efficiency compared with the traditional manual test, and saving the test resources; the power divider device is provided, the power divider device adopts the four power dividers, evenly divides one signal output by the GNSS simulation signal device into four signals, and can synchronously test the accuracy of the four GNSS signal timing devices; compared with the equipment that can only simultaneously test the accuracy of one GNSS signal timing device at a time, the embodiment improves the precision test efficiency of the GNSS signal timing device; the number of tests can also be flexibly set by the control device, the control device is connected to the output end of the clock difference comparison device, receives the clock difference values of the preset number of tests, and generates the timing accuracy statistical results of the four GNSS signal timing devices respectively according to the clock difference values of the preset number of tests, so as to realize the accuracy test of the four GNSS signal timing devices at the same time, and can also automatically test the timing accuracy of the GNSS signal timing device to be tested for a long time, thereby meeting the needs of various scenes.
[0038] In a preferred embodiment, in addition to using a four-way power divider, the power divider device can also use a two-way power divider or a three-way power divider, etc. According to the actual test requirements, the specific type of power divider device is selected to divide the signal output by the GNSS simulation signal device into the required number of signals, to realize the precision test of a specific number of GNSS signal timing devices at the same time, and to weaken the restriction of the specific type of power divider on the precision test equipment of the GNSS signal timing device.
[0039] In another preferred embodiment, the clock difference comparison device uses a core chip STM32H743ZIT6U, and the control device uses a core chip STM32F103C8T6, and the clock difference comparison device and the control device constitute an STM32 controller.
[0040] In another preferred embodiment, the control device generates timing accuracy statistical results of n GNSS signal timing devices according to preset clock difference values of a preset number of times, and the timing accuracy statistical results can be displayed in various forms, such as timing accuracy percentage and / or timing accuracy scatter plot, etc. The timing accuracy scatter plot is a timing accuracy display graph with time as the horizontal coordinate axis and timing accuracy as the vertical coordinate axis, so as to facilitate observation of the characteristics of the timing accuracy changing with time. According to the specific scene requirements, the timing accuracy statistical results of the GNSS signal timing device are displayed in a suitable form, so as to more intuitively understand the timing accuracy of the GNSS signal timing device.
[0041] The above is only a preferred embodiment of the present application, and does not limit the present application in any way. Any simple modification, change and equivalent structural transformation of the above embodiment according to the technical essence of the present application still belong to the protection scope of the technical scheme of the present application.
Claims
1. A precision test device for a GNSS signal timepiece, characterized by, The GNSS simulation signal device is connected with four power divider devices and clock difference comparison devices, and the GNSS signal timing device is connected between the four power divider devices and the clock difference comparison devices; The GNSS simulation signal device outputs a first GNSS simulation signal to the input end of the four power divider device and outputs a reference pulse signal to the IO5 interface of the clock difference comparison device; The output end of the four power divider device is connected with four GNSS signal timing devices; The clock difference comparison device has five input ends IO1 to IO5; The output ends of the GNSS signal timing devices 1 to 4 are connected with the IO1 to IO4 interfaces of the clock difference comparison device to transmit test pulses; The reference pulse signal output end of the GNSS simulation signal device is connected with the IO5 interface of the clock difference comparison device.
2. The precision test equipment for a GNSS signal time service device according to claim 1, characterized in that, The four power divider device has four output ends.
3. The precision test equipment for a GNSS signal time service device according to claim 2, characterized in that, Each output end of the four power divider device is connected with one GNSS signal timing device.
4. The precision test equipment for a GNSS signal time service device according to claim 3, characterized in that, The clock difference comparison device has five input ends, which are connected with the output end of the GNSS simulation signal device and the output ends of the four GNSS signal timing devices.
5. The precision test equipment for a GNSS signal time service device according to claim 1, characterized in that, The GNSS simulation signal device outputs a first GNSS simulation signal to the four power divider device and synchronously outputs a reference pulse signal to the clock difference comparison device; The four power divider device divides the received first GNSS simulation signal into four second GNSS simulation signals, which are output to the four GNSS signal timing devices respectively, and the GNSS signal timing devices 1 to 4 output corresponding time pulse signals to the IO1 to IO4 interfaces of the clock difference comparison device through corresponding calculation after receiving the second GNSS simulation signals; the reference pulse signal and the time pulse signal are both second pulse signals, the clock difference comparison device compares the four time pulse signals with the reference pulse signal provided by the GNSS simulation signal device, obtains the clock difference value of the time pulse signal and the reference pulse signal, and outputs the clock difference value to the control device through the output end; the control device flexibly sets the test times, receives the clock difference values of the preset test times, and generates the timing accuracy statistical results of the GNSS signal timing devices 1 to 4 according to the clock difference values of the preset times, and tests the accuracy of the four GNSS signal timing devices.
6. The precision testing apparatus for a GNSS signal timepiece according to claim 5, wherein The four power divider device outputs multiple second GNSS simulation signals to multiple GNSS signal timing devices, and the second GNSS simulation signals are signals obtained by dividing the first GNSS simulation signal.
7. The precision testing apparatus for a GNSS signal timekeeping device according to claim 6, wherein, The GNSS signal timing device outputs a time pulse signal to the clock difference comparison device.
8. The precision testing apparatus for a GNSS signal timepiece according to claim 7, wherein The output end of the clock difference comparison device outputs the clock difference value of the time pulse signal and the reference pulse signal.
9. The precision testing apparatus for a GNSS signal timepiece according to claim 8, wherein The reference pulse signal and the time pulse signal are both second pulse signals.
10. The precision testing device for a GNSS signal time service apparatus according to any one of claims 1 to 9, characterized in that, The output end of the clock difference comparison device is connected with a control device, and the control device outputs timing accuracy statistical results.