CN101604142A - Time information detection method of output signal of satellite synchronous timing device - Google Patents

Abstract

A method for detecting time information of the output signal of a satellite synchronous timing device, setting the output opening time T of the pulse signal output terminal (4) of the controllable time scale signal source (1), and setting it as an arrival trigger mode, cooperating with the controllable time scale signal source (1) The time scale signal source (1) outputs the pulse start 1pps synchronous with the satellite at the specified time T (27), triggers the oscilloscope (2) to capture the output signal of the satellite synchronous timing device (3), and completes the serial message of the satellite synchronous timing device Time information detection and correctness detection of B code time information of satellite synchronous time service device. This method is a detection method that can more comprehensively test the technical performance of the satellite synchronous timing device of the substation of the power grid, so that the time synchronization accuracy of the secondary equipment can be more completely guaranteed.

Description

Time information detection method of output signal of satellite synchronous timing device

technical field

The invention relates to a method for testing electric equipment, in particular to a method for detecting time information of an output signal of a satellite synchronous timing device using satellite signals for time synchronization of electric equipment.

Background technique

The time synchronization performance of the grid's substation (including substations, power plants) automation system telecontrol and other related electrical secondary intelligent electronic devices (IEDs) requires an accuracy of milliseconds and above. The time synchronization performance of secondary equipment is directly related to the correctness of the operation within the sub-station (local) and between sub-stations (off-site), as well as the timely and accurate analysis and judgment of accidents.

The satellite off-site time synchronization method is advanced and mature in technology, not affected by climate, and does not occupy power channels, so it is widely used in power grid substations. Most substations use satellite timing devices as the main clock source to perform timing for secondary equipment in the station to ensure time synchronization of each equipment. At present, most satellite time service devices use GPS satellite signals as the time synchronization source of the time service device itself, and are called GPS time service devices on site.

There are three types of output signals of satellite signal synchronous timing devices commonly used in substations:

Timing pulse output: In principle, it is synchronized with the satellite time reference pulse signal, and outputs the timing pulse signal (PPS, PPM, PPH) at the beat of each second, minute or hour. This signal is a time synchronization reference signal, which does not carry time information, and is usually used together with the serial message output signal to provide time service to the device. This type includes static empty contact output mode, the timing device controls the action of the contact according to the action beat of the timing pulse, and the external voltage is applied at both ends as the field expansion application of the timing pulse.

Serial message output: Usually, the physical layer follows the RS232, 485, 422 standard asynchronous transmission mode, or the physical layer standard of Ethernet, and there is no unified requirement for the data format of the time information transmitted. The time reference accuracy of this type of signal is difficult to guarantee.

B code output: It follows the time code information transmission method stipulated in the B standard of the IRIG series. It is usually realized by a dedicated modulation and demodulation component. There are two physical methods of information transmission, such as DC pulse width modulation and AC amplitude modulation. One frame of information (including 100 symbols) is transmitted per second, and each frame of information takes up one second. Each frame of information The starting point of the satellite is aligned with the rising edge of the 1pps pulse, and the time information points to the frame start time. That is, the B code not only has a time reference, but also carries the time information of the time reference.

The output signal of the satellite synchronous timing device is the clock source of the timed equipment. The traditional test method is not easy to effectively capture the time information sent and carried by it, and cannot fully achieve the purpose of determining the correctness of the time. The traditional test method is actually to test the time-frequency deviation of the output signal of the timing device. The pulse signal output by the satellite synchronous standard clock port is a beat signal (or a pair of time reference signals) that has been synchronized with the satellite time pulse and does not contain time information. Since it is difficult to determine the absolute time of the captured time information in this method, it is difficult to confirm the correctness of the B-code time information corresponding to the second pulse signal, and it is also difficult to detect the time information of the serial message.

Due to the appearance of the controllable time scale signal source device (another application), the output pulse of the standard clock source can be controlled to be output at a specified time, and the output clock pulse signal becomes an output pulse at a known certain time. The marker signal source has a switch controlled by the time with a determination accuracy higher than millisecond level, so that the output information of the satellite synchronous timing device can be determined.

Contents of the invention

The purpose of the present invention is to provide a time information detection method of the output signal of a satellite synchronous timing device that can more comprehensively detect the technical performance of the clock source equipment, thereby ensuring the time synchronization accuracy of the secondary equipment of the substation.

In the time information detection method of the output signal of the satellite synchronous timing device, the satellite synchronous timing device serial message time information detection method uses the following equipment: satellite synchronous timing device, multi-channel storage oscilloscope, controllable time scale signal source, Communication converters, computers.

The pulse signal output terminal of the controllable time scale signal source is connected to the detection channel A of the oscilloscope; the serial message output terminal of the satellite synchronous timing device is connected to the detection channel B of the oscilloscope; satellite antenna one and satellite antenna two are respectively connected to To the receiving end of the satellite synchronous timing device and the receiving end of the controllable time scale signal source; the serial message output terminal X1 of the satellite synchronous time service device is connected to the passive contact S1 end of the control switch S on the controllable time scale signal source ; The serial message output terminal X2 of the satellite synchronous timing device is connected to the input terminal C2 of the communication converter; the passive contact S2 end of the control switch S on the controllable time scale signal source is connected to the input terminal C1 of the communication converter; The output end of the converter is connected to the communication interface of the computer.

The tested message time information is "T time message" information, which is characterized in that: "T time message" information is collected from the computer through the following steps:

①. The control switch S of the controllable time scale signal source is closed, and the computer is in the state of normally receiving the message information output by the serial message output terminal X of the satellite synchronous timing device;

②. Set the output opening time T of the pulse signal output terminal of the controllable time scale signal source, and set it as the time-out trigger mode, and set the time when the control switch S of the controllable time scale signal source is turned off is the specified T time + control switch The action start delay time ΔT moment of S;

③. The controllable time scale signal source outputs 1pps at the beginning of the satellite synchronization pulse at time T at the specified time T;

④. At the specified time T + the action start delay time ΔT of the control switch S, turn off the control switch S of the controllable time scale signal source, and the computer finally receives the first serial message data frame after the specified T time That is, the "T time message" information, and the last data frame before the specified time T, that is, the "T-1sec time message" information.

The test preparation state of the oscilloscope and the controllable time scale signal source is: the channel A of the oscilloscope is set as the rising edge trigger display mode of the pulse input signal, the controllable time scale signal source and the satellite synchronous timing device are all synchronized with the satellite, and the controllable time scale The two ends of the passive contact of the control switch S marked with the signal source are closed.

The controllable time scale signal source outputs 1pps at the beginning of the satellite synchronization pulse at the time T at the specified time T, and the channels A and B of the oscilloscope capture the information waveform of the "T time message", and thus measure the time from T time to "T time The time Δt1 of the starting moment of the "T time message" information, and the time Δt required for the start and end of the "T time message" information.

The action start delay time ΔT of the control switch S is (the time Δt1 from the time T to the start time of the "T time message" information + the time Δt required for the start and end of the T time message information) to be received by the oscilloscope according to channel A The rising edge of the signal at the specified time T is randomly measured and obtained in advance before collecting the "T time message" information.

The delay time ΔT is within the following time range: (time Δt1 from time T to the start time of the "T time message" information + time Δt required for the start and end of the "T time message" information)<ΔT<1 second.

The pulse signal sent by the controllable time scale signal source at the specified time T may be a single pulse or a frequency pulse signal.

In the time information detection method of the output signal of the satellite synchronous timing device, the detection method of the correctness of the B code time information of the satellite synchronous timing device uses the following equipment: a satellite synchronous timing device, a multi-channel storage oscilloscope, and a controllable time scale signal source.

The pulse signal output terminal of the controllable time scale signal source is connected to the detection channel A of the oscilloscope; the B code signal output terminal of the satellite synchronous timing device is connected to the detection channel C of the oscilloscope; satellite antenna 1 and satellite antenna 2 are respectively connected to The receiving end of the satellite synchronous timing device and the receiving end of the controllable time scale signal source.

The tested B code time information is "T time IRIG-B encoded waveform" time information, which is characterized in that the "T time IRIG-B encoded waveform" time information is checked by the following steps:

①. Turn off the output of the pulse signal output terminal of the controllable time scale signal source, and set the channel A of the oscilloscope to the rising edge trigger display mode of the pulse input signal;

②. Set the pulse signal output terminal of the controllable time scale signal source to output the opening time T and set it as the time-out trigger mode;

③. The pulse signal output terminal of the controllable time scale signal source outputs 1pps at the beginning of the satellite synchronization pulse at the specified time T, and the "IRIG-B coded waveform at T time" is captured through channels A and C of the oscilloscope;

④. Read the time information according to the "T time IRIG-B code waveform", and compare its consistency with the time T set by the controllable time scale signal source.

The pulse signal sent by the controllable time scale signal source at the specified time T can be a single pulse signal or a frequency pulse signal.

The invention covers the traditional test content, can controllably obtain the signal and information output by the satellite synchronous timing device, and detect the accuracy of the signal sent by the output port of the satellite synchronous timing device and the correctness of information at the specified test time, and can comprehensively detect The technical performance of the clock source equipment, so as to ensure the accuracy of time synchronization of the secondary equipment of the substation, can provide technical basis for the acceptance, transformation and improvement of the automation system and secondary equipment of the substation, and is conducive to the safe production and stable operation of the power grid.

Description of drawings

Figure 1 is a schematic diagram of the traditional test method equipment connection,

Figure 2 is a schematic diagram of the traditional test method waveform,

Figure 3 is a traditional test flow chart,

Fig. 4 is a schematic diagram of device connection of the present invention,

Fig. 5 is a signal timing diagram of the test method of the present invention,

Fig. 6 is the flow chart of B code test of the present invention,

Fig. 7 is a flow chart of the serial message test of the present invention.

In the figure: 1-controllable time scale signal source, 2-oscilloscope, 3-satellite synchronous timing device, 4-pulse signal output terminal, 5-control switch S of controllable time scale signal source, 6-communication converter, 7 -The output terminal of the communication converter, 8-the communication interface of the computer, 9-the computer, 10-the timing pulse output terminal Z of the satellite synchronous timing device, 11-the B code output terminal Y of the satellite synchronous timing device, 12-the satellite synchronous Serial message output terminal X1 of the time service device, 13-serial message output terminal X2 of the satellite synchronous time service device, 14-the passive contact S1 terminal of the control switch S, 15-the passive contact S2 terminal of the control switch S, 16-communication converter input terminal C1, 17-communication converter input terminal C2, 18-satellite antenna 1, 19-satellite antenna 2, 20-controllable time scale signal source control switch action waveform, 21-controllable time scale signal Waveform of source pulse output terminal, 22-X waveform of message output terminal of satellite synchronous time service device, 23-Y waveform of B code output terminal of satellite synchronous time service device, 24-Z waveform of time pulse output terminal of satellite synchronous time service device, 25-control switch S’s action start delay time ΔT, 26-computer message receiving interruption time, 27-designated T time, 28-T time to the time Δt1 of the "T time message" information start time, 29-T time message information The time required for start and stop Δt, the time Δt2 from 30-T time to T time B code output start time, the time 31-T time to T time pulse output start time Δt3, 32-"T time message "Information waveform, 33-T time IRIG-B code waveform, 34-step-step, 35-step 2, 36-step 3, 37-step 4, 38-step 5, 39-B code test step -step, 40-B code test second step, 41-B code test third step, 42-B code test fourth step, 43-serial message test first step, 44-serial message test second Step, 45-serial message test step 3, 46-serial message test step 4, 47-serial message test step 5, 48-serial message test step 6, 49-satellite synchronization Standard clock, 50-"T-1sec time message" information waveform.

Detailed ways

Below in conjunction with accompanying drawing, invention is further described:

As a comparison, the following briefly introduces the traditional satellite synchronous timing device test method, as shown in Figure 1 is the traditional satellite synchronous timing device test device and connection diagram.

In Fig. 1, the pulse signal P_1pps of satellite synchronous standard clock 49 output, both can be with satellite time synchronization also can be provided by internal standard source; Satellite synchronous standard clock 49 and oscilloscope 2 form test equipment; Satellite synchronous time service device 3 is tested equipment. Figure 2 is a schematic diagram of an oscilloscope waveform under a traditional test method.

Among Fig. 1, the pulse signal output of the pulse signal output end 4 of the satellite synchronous standard clock 49 is connected to the detection channel A of the oscilloscope 2; the serial message output terminals 12, 13 of the satellite synchronous timing device 3 are connected to the detection channel of the oscilloscope B; the IRIG-B standard signal B code output terminal 11 and the timing pulse output terminal 10 of one frame per second are connected to the detection channels C and D of the oscilloscope respectively; satellite antenna one 18 and satellite antenna two 19 in Fig. 1, Connect to the receiving end of the satellite synchronous timing device and the receiving end of the satellite synchronous standard clock respectively.

Fig. 3 is the test flow block diagram of traditional test method, with the satellite synchronous timing device 3 and the satellite synchronous standard clock 49 all sending a signal per second as an example, the steps of the test method shown in Fig. 1, Fig. 2 and Fig. 3 are as follows:

As shown in Figure 3, the first step 34: in Figure 1, guarantee that satellite synchronous timing device 3 is normal with satellite synchronization, satellite synchronous standard clock 49 outputs P_1pps and satellite pulse signal synchronization;

Second step 35: the second pulse beat signal P_1pps sent by the pulse signal output terminal 4 of the satellite synchronous standard clock 49 is used as the time reference, and the channel A of the oscilloscope 2 and the channel B, C, D of the oscilloscope 2 can be measured at random. The difference between, that is, Δt1, Δt2, Δt3 in Figure 2;

The third step 36: if the output signal X, Y, Z stability of the internal punctuality state of the satellite synchronous timing device 3 in the test Fig. 1 is needed, then carry out the fourth step 37, otherwise the test ends;

The 4th step 37: in Fig. 1, disconnect the satellite antenna one 18 of satellite synchronous time service device 3, satellite synchronous time service device 3 will rely on the punctuality of internal clock, guarantee output terminal (X, Y, Z) 12,13, 11,10 signal continuity; In Fig. 1, disconnect the satellite antenna two 19 of satellite synchronous standard clock 49, the beat of pulse signal output terminal 4 output signal P_1pps pulse will be maintained by the internal standard clock source of satellite synchronous standard clock 49;

The fifth step 38: still take the pulse signal P_1pps of the signal output terminal 4 of the satellite synchronous standard clock 49 in Fig. 1 as a benchmark, repeat the test of Δt1, Δt2, and Δt3 in Fig. 2 according to the method of the second step 35 at intervals, and obtain Detect the stability of the output signal under the internal timing state of the satellite synchronous timing service device 3;

The test is over.

The traditional test method is actually to test the time frequency deviation of the output signal of the satellite synchronous timing device 3 . The pulse signal output by the pulse signal output terminal 4 of the satellite synchronous standard clock 49 is a beat signal (or a pair of time reference signals) that has been synchronized with the satellite time pulse and does not have time information. This method is not easy to confirm the correctness of the B code time information corresponding to the second pulse signal, and it is not easy to detect the time information of the serial message. The reason for this is that the absolute time of the captured time information cannot be determined.

The testing method of the invention covers traditional testing and can controllably capture the time information of the output signal of the satellite synchronous timing device.

Fig. 4 is a schematic diagram of the equipment composition and connection mode of the testing method of the present invention. In Fig. 4, the test equipment composed of controllable time scale signal source 1, oscilloscope 2, communication converter 6 and computer 9 tests the output signal of satellite synchronous timing device 3 and the time information it carries.

This test method is reflected in Fig. 4, has replaced the satellite synchronous standard clock 49 in traditional test method Fig. 1 with controllable time scale signal source 1; Communication converter 6 can be the communication interface converter of different standards, also can be 8 external connectors for the computer's communication interface.

In Figure 4, the characteristics of the controllable time scale signal source 1 are as follows:

a. The controllable time scale signal source 1 can work in the mode of satellite real-time synchronization, and can also work in the mode of keeping time with the internal standard clock source after synchronizing with the satellite;

b. The pulse beat output signal P_1pps output by the pulse signal output terminal 4 can be a satellite synchronous pulse, or can be converted from satellite synchronization to an internal standard source to maintain the pulse beat on time;

c. The controllable time scale signal source 1 can send a pulse beat P_1pps signal from the pulse signal output terminal 4 at a specified time, and can also close the signal output of the pulse signal output terminal 4 at any time;

d. The controllable time scale signal source 1 designates the on-off time of the passive contact of the control switch S5.

In Figure 4, the equipment connection mode of this test method:

The P_1pps output by the pulse signal output terminal 4 of the controllable time scale signal source 1 is connected to the detection channel A of the oscilloscope 2;

Serial message output 12,13 (X1 and X2 of X), B code output 11 (Y1 and Y2 of Y), timing pulse output 10 (Z1 and Z2 of Z) of satellite synchronous timing device 3, Connect to detection channels B, C, and D of oscilloscope 2 respectively;

The first satellite antenna 18 and the second satellite antenna 19 are respectively connected to the receiving end of the satellite synchronous timing device 3 and the receiving end of the controllable time scale signal source 1 .

The serial message output terminal X1 terminal 12 of the satellite synchronous timing device 3 is connected to the control switch passive contact S1 terminal 14 of the controllable time scale signal source 1;

The serial message output terminal X2 terminal 13 of the satellite synchronous timing device 3 is connected to the input terminal C2 terminal 17 of the communication converter 6;

The control switch passive contact S2 terminal 15 of the controllable time scale signal source 1 is connected to the input terminal C1 terminal 16 of the communication converter 6;

The output terminal 7 of the communication converter 6 is connected to the communication interface 8 of the computer 9 .

1. For the detection of traditional test items by this test method, it can be carried out with reference to the traditional test method and steps described in Figures 1, 2 and 3 above.

Still taking the output of the satellite synchronous timing device 3 and the controllable time scale signal source 1 (without operating the switch S) to send a signal once per second as an example, the traditional test steps are described as follows according to Figures 4, 2, and 3:

According to Fig. 3 first step 34: in Fig. 4, guarantee that satellite synchronous timing device 3 and satellite synchronization are normal, start controllable time scale signal source 1 output P_1pps and satellite pulse signal synchronization;

According to the second step 35 of Fig. 3: in Fig. 4, the pulse-per-second beat signal P_1pps sent by the pulse signal output terminal 4 of the controllable time scale signal source 1 is used as the time synchronization reference, and the channel A of the oscilloscope 2 can be randomly measured with the oscilloscope respectively. The difference between channels B, C, and D of 2, that is, Δt1, Δt2, and Δt3 in Figure 2;

According to the third step 36 of Fig. 3: as the output signal X, Y, Z stability of the internal timing state of the satellite synchronous timing device 3 in the test Fig. 4, then carry out the fourth step 37, otherwise the test ends;

According to Fig. 3 fourth step 37: in Fig. 4, disconnect the satellite antenna one 18 of satellite synchronous time service device 3, satellite synchronous time service device 3 will rely on the time service of internal clock, guarantee that satellite synchronous time service device 3 output terminal signals X, Y , the continuity of Z; In Fig. 4, disconnect the satellite antenna two 19 of controllable time scale signal source 1, the internal standard clock source of the beat tracking controllable time scale signal source 1 of pulse signal output terminal 4 output signal P_1pps pulse;

According to the fifth step 38 in Fig. 3: still taking the pulse signal P_1pps of the pulse signal output terminal 4 of the controllable time scale signal source 1 in Fig. 4 as a benchmark, repeat the test of Δt1, Δt2, Δt3, draw the stability of the output signal under the internal timing state of the satellite synchronous timing device 3;

The test is over.

Since the controllable time scale signal source 1 in FIG. 4 has the function of selecting P_1pps to output satellite pulses at a specified time, the signal output error of the satellite synchronous timing device 3 can be detected at a certain moment, and is not limited to random detection. That is, Δt1 , Δt2 , and Δt3 at the specified time T 27 in FIG. 5 can be detected.

2. B code time information detection

In Fig. 4, it is possible to detect the time information carried by the "B code output" signal Y of the satellite synchronous timing device 3 at a specified time, and Fig. 6 is the flow process of the detection method, and the detection steps are as follows:

The first step 39 of the B code test in Figure 6: the controllable time scale signal source 1 and the satellite synchronous timing device 3 are all synchronized with the satellite in Figure 4, and the pulse signal output terminal 4 of the controllable time scale signal source 1 outputs the signal in Figure 4 With the 1pps pulse synchronization of the satellite, the "B code output" terminal 11 (i.e. Y1 and Y2 of Y) of the satellite synchronous timing device 3 sends a signal once per second, check that the signal reception of the oscilloscope 2 channels A and C in Fig. 4 is normal;

The second step 40 of the B code test in Fig. 6: as shown in Fig. 4, close the output of the pulse signal output terminal 4 of the controllable time scale signal source 1, and the oscilloscope 2 sets channel A as the rising edge trigger display mode of the pulse input signal;

The third step 41 of the B code test in Fig. 6: as shown in Fig. 4, set the pulse signal output terminal 4 of the controllable time scale signal source 1 to output the opening time T and set it as the time-out trigger mode, and the time T is as Fig. 5 The rising edge of the satellite synchronization pulse at the specified time of the specified P_1pps signal that channel A expects to capture;

The fourth step 42 of the B code test in Fig. 6: the pulse signal output terminal 4 of the controllable time scale signal source 1 as shown in Fig. 4, output 1pps of the satellite synchronous pulse initiation at time T, and pass through the channel A of the oscilloscope 2 in Fig. 4 , C captures the specified T time 27 of Fig. 5 and the T time "IRIG-B code" waveform 33 of Fig. 5, the time information can be read out according to the T time "IRIG-B code" waveform 33 of Fig. 5, and compares it with that in Fig. 4 The consistency of the time T set by the controllable time scale signal source 1;

The test is over.

3. Serial packet time information detection

In FIG. 4 , the time information sent by the serial message output terminals 12 and 13 (that is, X1 and X2 of X) of the timing device 3 can be regularly detected. Fig. 7 is the flow process of detection method, and detection step is as follows:

The first step 43 of the serial message test in Figure 7: as shown in Figure 4, the controllable time scale signal source 1 and the satellite synchronous timing device 3 are all synchronized with the satellite, and the pulse signal output terminal 4 of the controllable time scale signal source 1 in Figure 4 outputs The signal is synchronized with the 1pps pulse of the satellite, the controllable switch S5 of the controllable time scale signal source 1 is closed, and the serial message output terminals 12 and 13 of the satellite synchronous timing device 3 (that is, X1 and X2 of X) send a report once per second Text signal;

The second step 44 of the serial message test of Fig. 7: as shown in Fig. 4, check that the signal reception of oscilloscope 2 channels A, B is normal, check that computer 9 can normally receive the X output message information of satellite synchronous timing device 3;

The third step 45 of the serial message test in Figure 7: the oscilloscope 2 in Figure 4 can randomly measure the time T to the "T time message" information in the waveform of Channel B in Figure 5 according to the rising edge of the signal received by Channel A in Figure 5 The time Δt128 at the beginning moment, and the time 29Δt required for the start and end of the "T time message" information in Figure 5 is measured, and (Δt1+Δt) is obtained; the pulse signal output terminal 4 of the controllable time scale signal source 1 is closed in Figure 4 The pulse output signal of the oscilloscope 2 is set to trigger the display mode of the rising edge of the pulse input signal on channel A;

The fourth step 46 of the serial message test of Fig. 7: set the pulse output opening time T of the pulse signal output terminal 4 of the controllable time scale signal source 1 in Fig. 4, and set it as the trigger mode when it arrives (designate T moment 27 as The specified P_1pps signal that channel A expects to capture as shown in Figure 5 is at the rising edge of the satellite synchronous pulse at the specified moment), and the controllable time scale signal source 1 controllable switch S5 disconnection time 0 in Figure 4 is set to be (T+ΔT), wherein ΔT is related to (Δt1+Δt) obtained in the third step of this detection step, (Δt1+Δt)<ΔT<1sec;

The fifth step 47 of the serial message test in Fig. 7: the pulse signal output terminal 4 of the controllable time scale signal source 1 in Fig. 4, output 1pps of the satellite synchronous pulse start at T moment, pass through the channel A of Fig. 4 oscilloscope 2, B can capture the information waveform 32 of the "T time message" in Figure 5;

The sixth step 48 of the serial message test in Fig. 7: the controllable switch S5 of the controllable time scale signal source 1 in Fig. 4 is disconnected at (T+ΔT) moment, the serial message output terminal X1 of the satellite synchronous timing device 3 The connection between terminal 12 and terminal 16 of communication converter input terminal C1 is cut off, and the serial message information reception of computer 9 is stopped; the serial message information received by computer 9 in Fig. 4 is the serial message test The information frame content of " T time message " information waveform 32 in the 5th step 47, also is the first serial message data frame after T moment; The penultimate serial message that computer 9 receives among Fig. 4 The message information is the information of the last serial message data frame "T-1sec time message" before the time T.

The test is over.

Claims (7)

1. the temporal information detection method of the synchronous time service device output signal of satellite is characterized in that: " T time message " information of being tested collects from computing machine (9) through following steps:

1., gauge tap S (5) closure in controlled timing signal source, computing machine (9) is in the message information state that the serial message output terminal X (12,13) of the synchronous time service device of normal reception satellite is exported;

2., set the output open hour T of the pulse signal output end (4) in controlled timing signal source (1), and being changed to triggering mode then, gauge tap S (5) disconnection of setting controlled timing signal source is to specify the action initial delay time Δ T (25) of the T moment (27)+gauge tap S constantly constantly;

3., the T initial 1pps of (27) output T moment satellite synchronizing pulse is constantly being specified in controlled timing signal source (1);

4., at the action initial delay time Δ T (25) that specifies the T moment (27)+gauge tap S constantly, disconnect the gauge tap S (5) in controlled timing signal source, first serial message data frame that computing machine (9) finally received after the appointment T moment (27) is " T time message " information, and preceding final data frame of the appointment T moment (27) is " T-1sec time message " information.

2. the temporal information detection method of the synchronous time service device output signal of satellite according to claim 1, it is characterized in that: the T initial 1pps of (27) output T moment satellite synchronizing pulse is constantly being specified in described controlled timing signal source (1), passage A, the B of oscillograph (2) captures " T time message " information waveform (32), and be carved into the time Δ t1 (28) in " T time message " the initial moment of information when recording T thus, and T time message information rises, end required time Δ t (29).

3. the temporal information detection method of the synchronous time service device output signal of satellite according to claim 1, it is characterized in that: the action initial delay time Δ T (25) of described gauge tap S is (time Δ t1 (the 28)+T time message information that is carved into " T time message " the initial moment of information during T plays, ends required time Δ t (29)), measure at random according to the rising edge of the appointment T moment (27) signal of passage A reception by oscillograph (2), before " T time message " information of collection, obtain in advance.

4. the temporal information detection method of the synchronous time service device output signal of satellite according to claim 1, it is characterized in that: the action initial delay time Δ T (25) of described gauge tap S in following time range, (time Δ t1 (28)+" T time message " information that is carved into " T time message " the initial moment of information during T rise, end required time Δ t (29))＜Δ T＜1 second.

5. the temporal information detection method of the synchronous time service device output signal of satellite according to claim 1, it is characterized in that: described controlled timing signal source (1) can be a monopulse at the pulse signal of specifying the T moment (27) to send, and also can be the frequency pulse signal.

6. the temporal information detection method of the synchronous time service device output signal of satellite, it is characterized in that: described T time IRIG-B coding waveforms (33) temporal information is checked by following steps:

1., close the output of the pulse signal output end (4) in controlled timing signal source (1), it is that the pulse input signal rising edge triggers display mode that oscillograph (2) is provided with passage A;

2., the pulse signal output end (4) of setting controlled timing signal source (1) is exported open hour T and is changed to triggering mode then;

3., the output of the pulse signal output end (4) in controlled timing signal source (1) specifies the T initial 1pps of satellite synchronizing pulse of (27) constantly, captures the IRIG-B coding waveforms (33) of T time by passage A, the C of oscillograph (2);

4., according to T time IRIG-B coding waveforms (33) information readout time, relatively itself and controlled timing signal source (1) set the consistance of time T.

7. the temporal information detection method of the synchronous time service device output signal of satellite according to claim 6, it is characterized in that: described controlled timing signal source (1) can be a single pulse signal at the pulse signal of specifying the T moment (27) to send, and also can be the frequency pulse signal.

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