CN202421767U

CN202421767U - Time unification equipment

Info

Publication number: CN202421767U
Application number: CN2011205453885U
Authority: CN
Inventors: 杨利韬; 李贽; 许霁
Original assignee: KUNMING LINGHU TECHNOLOGY DEVELOPMENT Co Ltd; No 750 Test Field of China Shipbuilding Industry Corp
Current assignee: KUNMING LINGHU TECHNOLOGY DEVELOPMENT Co Ltd; No 750 Test Field of China Shipbuilding Industry Corp
Priority date: 2011-12-23
Filing date: 2011-12-23
Publication date: 2012-09-05
Anticipated expiration: 2021-12-23

Abstract

The utility model relates to the technical field of time unification, and is particularly suitable for time unification of a test system based on analog signal recording. Time unification equipment comprises a singlechip, a programmable logic device and a high-speed digital/analog (D/A) chip, and is characterized by also comprising a global positioning system (GPS) receiving module, wherein one port of the GPS receiving module is connected with a GPS receiving antenna, and the other end of the GPS receiving module is connected with the singlechip; the GPS receiving module is also connected with the programmable logic device; the programmable logic device is respectively connected with a crystal oscillation device and the high-speed D/A chip; and the high-speed D/A chip converts an input digital signal into an analog signal and outputs an analog encoded time unification signal. The inventor inspects the time unification equipment. The time unification equipment has the beneficial effects of simple implementation and convenience in operation and can precisely synchronize test data among a plurality of sets of test equipment.

Description

A kind of timing equipment

Technical field

The present invention relates to the time unification technical field, be specially adapted to time unification based on the test macro of analog signal record.

Background technology

In some engineering test,, many cover testing apparatuss need be set in the different location measure simultaneously, and the data that many covers testing apparatus is obtained are had the data sync requirement like the long-range trajectory measurement of long baseline, multi-point joint measurement etc.But when between many covers testing apparatus during on line operation; The multiple spot synchro measure is easy to realize; But when many cover testing apparatuss can't on line operation, how effectively carrying out the multiple spot synchro measure was to need to consider, studies a kind of general easy-operating method for synchronous and is necessary.Record one segment standard time-base signal in test process is a kind of solution route of realizing time unification between many complete equipments.

Before the present invention's generation, using, the multiple spot synchro measure adopts long-range time service to accomplish usually, needs the support of Wireless Telecom Equipment.And have some test record equipment not support long-range time service, and needing to increase other support equipments and accomplish long-range time service, operation is comparatively complicated.

The utility model content

In order to overcome the defective of prior art, the invention provides a kind of timing equipment, can multiple spot different location synchro measure.

A kind of timing equipment comprises single-chip microcomputer, PLD and high-speed d/a chip, it is characterized in that; Also have a GPS receiver module, port of GPS receiver module connects the GPS receiving antenna, and the other end is connected with single-chip microcomputer; The GPS receiver module is connected with PLD again; PLD is connected with the high-speed d/a chip with the crystal oscillator device respectively again, and the high-speed d/a chip converts the digital signal of input into simulating signal, system signal when exporting the coding of simulation.

The inventor has carried out implementing checking to the present invention.Its beneficial effect is, realizes simply, easy to operate, can realize the precise synchronization of test data between many cover testing apparatuss, and the data sync precision reaches microsecond level (mainly being determined by GPS module precision and testing apparatus sampling rate).

Description of drawings

Fig. 1, the utility model structural representation;

Fig. 2, the utility model user mode synoptic diagram;

Fig. 3, the signal waveform synoptic diagram of uniting when being coding; The GPS pulse per second (PPS) is the standard second pulse signal of GPS module output in the timing equipment; The time system signal of system signal 1 for adopting that width modulation produces during coding; The time system signal of system signal 2 for adopting that frequency modulation (PFM) produces during coding, time the unite signal of system signal 3 for adopting simultaneously that width modulation and frequency modulation (PFM) produce during coding;

Fig. 4, system signal exemplary plot during for the coding of frequency modulation (PFM) mode.

Embodiment

In conjunction with Fig. 2, the method for application of timing equipment is described.

A. when the testing apparatuss of cover more than needs are provided with in a plurality of places are carried out combined measurement, be that every cover testing apparatus is equipped with a timing equipment;

B. after timing equipment receives effective gps signal, system signal when the coding that standard time information is arranged is modulated in output;

C. each testing apparatus is carried out the A/D acquisition and recording to when coding system signal in record test data, system signal in the time of can on testing apparatus, increasing the omnidistance record coding of a passage, and the signal of uniting in the time of also can on TCH test channel, writing down the coding of several seconds durations gets final product;

The standard time information that comprises in the system signal when d. detecting the coding of each testing apparatus record according to the prior modulator approach of agreement behind the EOT promptly can be known the corresponding standard time of data in each testing apparatus;

E. carry out the time delay correction according to the corresponding standard time of data in each testing apparatus, can accomplish each testing apparatus data in time synchronously, realize each equipment time unification of test macro;

F. the concrete modulator approach of standard time information can be set as required flexibly.

In conjunction with Fig. 3, Fig. 4, be embodiment with the frequency modulation (PFM) to the time system signal coded system be described further.

A. establishing the frequency modulation (PFM) function is f (.)=f0+k1*t, and wherein f is the carrier frequency of pulse A1, A2, A3, and f0 is a reference frequency, and k1 is the index of modulation, when t is the H of GPS standard time information, M branch, S second;

B., the pulsewidth that the GPS pulse per second (PPS) is set is 5ms, interval x=10ms, y=5ms, pulsewidth z=10ms;

C., reference frequency f0=10kHz, index of modulation k1=1000 are set, suppose that the corresponding standard time of gps signal A is 16: 00: 42, then f (H)=26kHz, f (M)=10kHz, f (S)=52kHz; Suppose that the corresponding standard time of gps signal B is 17: 35 20s, then f (H)=27kHz, f (M)=45kHz, f (S)=30kHz; The system signal is as shown in Figure 4 during the corresponding coding that produces constantly of gps signal A, B.

A kind of GPS standard time information is modulated by ad hoc approach forms the timing equipment that the signal of uniting when encoding is exported; The standard time information that all comprises this moment when each of output encoded in the system signal; When testing apparatus should be encoded in test process the system signal record after; The standard time information that comprises in the system signal when encoding through detecting just can accurately be known the corresponding standard time of data that testing apparatus is obtained.A plurality of testing apparatuss in the test macro use said method to confirm the standard time that test data is corresponding simultaneously, just can the data of different testing apparatuss in the whole test system be carried out time unification.

Timing equipment mainly is made up of GPS receiver module, single-chip microcomputer, PLD, high-speed d/a chip, crystal oscillator.In conjunction with Fig. 1, the design of timing equipment is described: the GPS receiver module receives gps signal and output specifies statement to give single-chip microcomputer; Corresponding gps data in the single-chip microcomputer interpretation GPS statement (GPS whether effectively, standard time information), single-chip microcomputer is defeated by PLD with standard time information through 24 I/O oral instructions then; PLD is encoded GPS signal second and the standard time information that receive according to the coded system of setting, and carries out accurate sequential control, and the system signal is transferred to the high-speed d/a chip when forming digital coding; The high-speed d/a chip converts the digital signal of input into simulating signal in real time, system signal when exporting the coding of simulation; Crystal oscillator provides the high accuracy clock signal.Can carry out program burn writing to PLD through programming port, the program that the coded system of needs is corresponding is loaded in the timing equipment.

The design of system signal when the key of this timing equipment is to exchange the coding that is shaped on GPS standard time information, in conjunction with Fig. 3, the signaling mode design of system signal describes during to coding:

After GPS module in the timing equipment receives effective GPS information; Come its standard of interim interpretation Beijing time at each gps signal (one of per second); Obtain Hour Minute Second corresponding variable H, M, S, these 3 variablees carried out frequency modulation (PFM), system signal 1 during coding shown in the output map 3: when A constantly (during H M divide S second) come interim; Output GPS pulse per second (PPS) A; Output pulse width is that z millisecond carrier frequency is the pulse A1 of f (H) behind the x millisecond at interval, and output pulse width is that z millisecond carrier frequency is the pulse A2 of f (M) behind the y millisecond of interval again, and output pulse width is that z millisecond carrier frequency is the pulse A3 of f (S) behind the y millisecond of interval again.M divided S the pulse per second (PPS) that export second constantly when the carrier frequency of A1, A2, these 3 pulses of A3 (f (H), f (M), f (S)) expression GPS pulse per second (PPS) A was Beijing time H.F (.) is the frequency modulation (PFM) function.When each effective GPS signal comes second, repeat above-mentioned interpretation and pulsed modulation coding, and the signal of uniting during the coding after will modulate is exported to testing apparatus.

Can frequency modulation (PFM) be changed to width modulation; System signal 2 during coding shown in the output map 3: when A constantly (during H M divide S second) come interim; Output GPS pulse per second (PPS) A; Output pulse width is the pulse A1 of g (H) millisecond behind the x millisecond at interval, and output pulse width is the pulse A2 of g (M) millisecond behind the y millisecond of interval again, and output pulse width is g (S) millisecond pulse A3 behind the y millisecond of interval again.M divided S the pulse per second (PPS) that export second constantly when the pulsewidth of A1, A2, these 3 pulses of A3 (g (H) millisecond, g (M) millisecond, g (S) millisecond) expression GPS pulse per second (PPS) A was Beijing time H.G (.) is the width modulation function.When each effective GPS signal comes second, repeat above-mentioned interpretation and pulsed modulation coding, and the signal of uniting during the coding after will modulate is exported to testing apparatus.

Also can carry out width modulation and frequency modulation (PFM) during information of same to the standard time, system signal 3 when obtaining the coding shown in Fig. 3, the principle signal 2 of uniting when system signal 1, coding during with coding is identical.

System signal circulation in per 24 hours during coding that this modulator approach produces can solve the data synchronization problems during many covers testing apparatus synchro measure of any time in one day 24 hours.When being modulated to standard time information in the signal of uniting when encoding, concrete modulator approach can be made amendment as required, width modulation that is not limited to here describe and frequency modulating method.

The system signal just has been equivalent to write down a time base that has standard Beijing time information during the testing apparatus record coding, the corresponding standard time of base in the time of just can knowing through pulse demodulation, thus confirm the corresponding standard time of test data in the testing apparatus.When overlapping the testing apparatus combined measurement more; If each testing apparatus can't realize time unification through opening the survey record function simultaneously; The standard time information that comprises in the system signal in the time of then can behind EOT, detecting the coding of each testing apparatus record; Thereby obtain the corresponding standard time of data in each testing apparatus, carry out the time delay correction, realize data between each testing apparatus in time synchronously.

Claims

1. a timing equipment comprises single-chip microcomputer, PLD and high-speed d/a chip, it is characterized in that; Also have a GPS receiver module, port of GPS receiver module connects the GPS receiving antenna, and the other end is connected with single-chip microcomputer; The GPS receiver module is connected with PLD again; PLD is connected with the high-speed d/a chip with the crystal oscillator device respectively again, and the high-speed d/a chip converts the digital signal of input into simulating signal, system signal when exporting the coding of simulation.