CN209949114U - Time frequency device with multiple networking modes - Google Patents
Time frequency device with multiple networking modes Download PDFInfo
- Publication number
- CN209949114U CN209949114U CN201920513697.0U CN201920513697U CN209949114U CN 209949114 U CN209949114 U CN 209949114U CN 201920513697 U CN201920513697 U CN 201920513697U CN 209949114 U CN209949114 U CN 209949114U
- Authority
- CN
- China
- Prior art keywords
- time
- frequency
- frequency device
- signal
- ptp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a time frequency device of multiunit net mode, including the car time frequency device and the car time frequency device of following that the time service was carried out to the time frequency device when the car, time frequency device includes big dipper functional module and time functional module. The train time frequency device and the slave train time frequency device can establish a communication link through a radio station and can also be connected through a coated wire or an optical cable wire, so that the time synchronization of the training unit is quicker, and the efficiency is improved.
Description
Technical Field
The utility model relates to a time frequency field specifically is a time frequency device of multiunit net mode.
Background
At present, time-frequency equipment installed on training vehicles mostly adopts a wired mode for networking, namely, the vehicles are connected through a covered wire, an inner net opening and an outer net opening of the time-frequency equipment are connected to the walls of the vehicles through a switch, and a master vehicle can sequentially give time to slave vehicles. Under the condition of severe training environment, such as a cave and a swamp area, wired networking cannot be realized, so that time synchronization cannot be realized among training vehicles. This limits the flexibility and maneuverability of training, and also brings trouble to normal networking and time service work, and also limits the distance of training vehicles.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve prior art's problem, provide a time frequency device of many network deployment modes, both compatible wired network deployment mode also supports the mode of wireless network deployment, realizes wired, wireless network deployment each other is equipped with.
The utility model discloses a car time frequency device and carry out the slave vehicle time frequency device of time service through car time frequency device.
The master vehicle time-frequency device and the slave vehicle time-frequency device can establish a communication link through a radio station, and the master vehicle time-frequency device can time the slave vehicle time-frequency device through PTP. The time frequency device is connected with a radio station through a switch and a 10MHz signal.
The master vehicle time-frequency device and the slave vehicle time-frequency device can also be connected through a coated wire or an optical cable, and the master vehicle time-frequency device carries out time service on the slave vehicle time-frequency device through one of NTP, PTP, B code and PTP _ E1.
The master car time frequency device and the slave car time frequency device respectively comprise a Beidou functional module and a time frequency functional module.
Big dipper functional module include multiplexer and big dipper integrated processing unit, wherein the multiplexer passes through antenna reception big dipper satellite signal and transmits big dipper integrated processing unit, big dipper integrated processing unit calculates output big dipper time information, locating information, the 1PPS + TOD signal that the output is superior to 50ns simultaneously gives time frequency functional module.
The time-frequency function module comprises a reference input and selection module, a time calibration unit, a frequency calibration unit and a coding module, wherein the reference input and selection module selects a proper time frequency input signal as a reference source of the system according to an internal priority list or an external control selection signal, the input signal comprises 1PPS + TOD, B (DC) optical signals, B (DC) electric signals, PTP and external 10MHz signals, the reference input and selection module filters and phase-measuring the input signals, then respectively transmits the time signals and the frequency signals to the time calibration unit and the frequency calibration unit to calibrate local time and frequency, and the coding output module outputs the time and frequency signals according to a coding protocol, wherein the coding output module outputs the time and frequency signals comprising 1PPS + TOD, IRIG-B, NTP, PTP and PTP _ E1.
The frequency calibration unit is connected with rubidium atomic clock, combines rubidium atomic clock long-stability characteristic and frequency standard output module low phase noise characteristic, outputs 10 MHz. And the time-frequency function module data carries out data acquisition, algorithm processing and high-resolution digital frequency control technology on the rubidium atomic clock for external taming.
The utility model has the advantages that:
1. the existing wired networking mode of the time-frequency equipment installed on the shaped vehicle is compatible, and wireless networking are supported, so that the time synchronization of the training unit is faster, and the efficiency is improved.
2. The master car time frequency device can monitor the time deviation of the time frequency device of the slave car, and once the time deviation exceeds a threshold value set by a user, the time frequency device automatically gives time to the slave car.
3. The master vehicle time-frequency device can time at least 16 slave vehicle time-frequency devices.
Drawings
Fig. 1 is a schematic diagram of a time-frequency device for wireless networking.
FIG. 2 is a schematic diagram of the internal connections of a time frequency device.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The utility model discloses a car time frequency device and carry out the slave vehicle time frequency device of time service through car time frequency device.
The master vehicle time-frequency device and the slave vehicle time-frequency device can establish a communication link through a radio station, and as shown in figure 1, the master vehicle time-frequency device carries out time service on the slave vehicle time-frequency device through PTP. The time frequency device is connected with a radio station through a switch and a 10MHz signal.
The master vehicle time-frequency device and the slave vehicle time-frequency device can also be connected through a coated wire or an optical cable, and the master vehicle time-frequency device carries out time service on the slave vehicle time-frequency device through one of NTP, PTP, B code and PTP _ E1.
The master car time frequency device and the slave car time frequency device both comprise a Beidou functional module and a time frequency functional module, and are shown in figure 2.
Big dipper functional module include multiplexer and big dipper integrated processing unit, wherein the multiplexer passes through antenna reception big dipper satellite signal and transmits big dipper integrated processing unit, big dipper integrated processing unit calculates output big dipper time information, locating information, the 1PPS + TOD signal that the output is superior to 50ns simultaneously gives time frequency functional module.
The time-frequency function module comprises a reference input and selection module, a time calibration unit, a frequency calibration unit and a coding module, wherein the reference input and selection module selects a proper time frequency input signal as a reference source of the system according to an internal priority list or an external control selection signal, the input signal comprises 1PPS + TOD, B (DC) optical signals, B (DC) electric signals, PTP and external 10MHz signals, the reference input and selection module filters and phase-measuring the input signals, then respectively transmits the time signals and the frequency signals to the time calibration unit and the frequency calibration unit to calibrate local time and frequency, and the coding output module outputs the time and frequency signals according to a coding protocol, wherein the coding output module outputs the time and frequency signals comprising 1PPS + TOD, IRIG-B, NTP, PTP and PTP _ E1.
The frequency calibration unit is connected with rubidium atomic clock, combines rubidium atomic clock long-stability characteristic and frequency standard output module low phase noise characteristic, outputs 10 MHz. And the time-frequency function module data carries out data acquisition, algorithm processing and high-resolution digital frequency control technology on the rubidium atomic clock for external taming.
The data acquisition refers to the acquisition of phase difference data required by the accuracy of the calculated frequency, and the main technical difficulty is the resolution of the data acquisition, which is determined by two aspects, namely the measurement precision of a phase difference measurement module and the jitter of a reference source and a rubidium clock. Theoretically, the discipline effect of the equipment is directly determined by the data acquisition resolution. In order to ensure the output precision, the rear end adopts data processing of wild value elimination, sliding average and Kalman filtering sequence, and simultaneously prolongs the measurement time, and improves the measurement precision through the accumulation of time.
The time frequency device outputs stable and reliable 10MHz signals to a radio station, and the whole training unit vehicle realizes wireless networking. The outer network port of the main vehicle time-frequency device can monitor the time deviation between the slave vehicle time-frequency device and the main vehicle time-frequency device in real time, and once the deviation exceeds a threshold value, the main vehicle time-frequency device provides time for the slave vehicle time-frequency device in a multicast mode according to a PTP network protocol. In order to avoid the influence of the exchanger on the time-frequency device, the time-frequency device adopts a hardware timestamp and adopts a special flow prediction model, so that the influence of network burst flow on the time-service precision can be effectively eliminated, and the time-service precision superior to 10 mu s is realized.
The utility model discloses the concrete application way is many, and the above-mentioned only is the preferred embodiment of the utility model, should point out, to ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements, and these improvements also should be regarded as the utility model discloses a scope of protection.
Claims (5)
1. The utility model provides a time frequency device of multiunit network mode, includes that owner's car time frequency device and through owner's car time frequency device carry out the slave vehicle time frequency device of time service, its characterized in that: the master vehicle time-frequency device and the slave vehicle time-frequency device both comprise a Beidou functional module and a time-frequency functional module; the Beidou function module comprises a multiplexer and a Beidou integrated processing unit, wherein the multiplexer receives Beidou satellite signals through an antenna and transmits the Beidou satellite signals to the Beidou integrated processing unit, the Beidou integrated processing unit calculates and outputs Beidou time information and positioning information, and simultaneously outputs 1PPS + TOD signals which are better than 50ns to the time frequency function module; the time-frequency function module comprises a reference input and selection module, a time calibration unit, a frequency calibration unit and a coding module, wherein the reference input and selection module selects a proper time frequency input signal as a reference source of the system according to an internal priority list or an external control selection signal, the input signal comprises 1PPS + TOD, an optical signal, an electric signal, PTP and an external 10MHz signal, the reference input and selection module filters and phase-measuring the input signal, transmits the time signal and the frequency signal to the time calibration unit and the frequency calibration unit respectively to calibrate local time and frequency, and the coding output module outputs the time and frequency signal according to a coding protocol, wherein the time and frequency signal comprises 1PPS + TOD, IRIG-B, NTP, PTP and PTP _ E1.
2. The multi-grid mode time-frequency device according to claim 1, wherein: the master vehicle time-frequency device and the slave vehicle time-frequency device establish a communication link through a radio station, and the master vehicle time-frequency device carries out time service on the slave vehicle time-frequency device through PTP.
3. The multi-grid mode time-frequency device according to claim 2, wherein: the time frequency device is connected with a radio station through a switch and a 10MHz signal.
4. The multi-grid mode time-frequency device according to claim 1, wherein: the master vehicle time-frequency device and the slave vehicle time-frequency device are connected through a coated wire or an optical cable, and the master vehicle time-frequency device is used for timing the slave vehicle time-frequency device through one of NTP, PTP, B code and PTP _ E1.
5. The multi-grid mode time-frequency device according to claim 1, wherein: the frequency calibration unit is connected with a rubidium atomic clock and a frequency scale output module, and the time frequency function module data is used for outputting 10MHz to the rubidium atomic clock which is a reference for external domestication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920513697.0U CN209949114U (en) | 2019-04-16 | 2019-04-16 | Time frequency device with multiple networking modes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920513697.0U CN209949114U (en) | 2019-04-16 | 2019-04-16 | Time frequency device with multiple networking modes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209949114U true CN209949114U (en) | 2020-01-14 |
Family
ID=69128686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920513697.0U Active CN209949114U (en) | 2019-04-16 | 2019-04-16 | Time frequency device with multiple networking modes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209949114U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889294A (en) * | 2019-04-16 | 2019-06-14 | 江苏无线电厂有限公司 | The time-frequency device of more networking models |
-
2019
- 2019-04-16 CN CN201920513697.0U patent/CN209949114U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889294A (en) * | 2019-04-16 | 2019-06-14 | 江苏无线电厂有限公司 | The time-frequency device of more networking models |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7899619B2 (en) | Apparatus and method for transmitting information using an IRIG-B waveform generated by an intelligent electronic device | |
| CN105846988B (en) | A kind of clock and frequency synchronization method of multi-aerial radio communication system | |
| US8953645B2 (en) | Communication system, communication apparatus and time synchronization method | |
| CN102006159A (en) | Multi-slave clock sampling value multi-interface synchronizing system based on IEEE1588 | |
| US20010023464A1 (en) | Time synchronization of units in a system | |
| KR101290643B1 (en) | Method and system for bearing time synchronization protocol in optical transport network | |
| CN111711948B (en) | Method and system for acquiring high-precision time from 5G base station through air interface | |
| KR20120127779A (en) | Rtls system using tdoa | |
| CN102221816B (en) | Satellite time serving all-in-one machine and time serving method thereof | |
| WO2004048997A1 (en) | Device, system and method for obtaining timing information and ranging | |
| CN103188066A (en) | Reference clock signal processing method and device | |
| CN114567926B (en) | Clock synchronization and trigger device for wireless distributed test system | |
| CN112821974B (en) | High-precision time synchronization method and device for vehicle-mounted ECU | |
| CN209949114U (en) | Time frequency device with multiple networking modes | |
| CN201654495U (en) | Satellite time transfer integrative machine | |
| US11153065B2 (en) | Methods, apparatus and computer-readable media for synchronization over an optical network | |
| CN114142957A (en) | Remote time-frequency equipment testing method | |
| CN111010250B (en) | Method and system for realizing high-precision time synchronization | |
| JP4543836B2 (en) | Time synchronization method for data processing system | |
| US10298343B2 (en) | Systems and methods for time-synchronized communication | |
| US9923653B2 (en) | Audio system | |
| KR101784408B1 (en) | Time synchronized system | |
| CN212181272U (en) | Time service device applied to aviation multi-target remote measurement ground station | |
| KR101521893B1 (en) | Apparatus and method for delay time computing and delay adjusting between base station and remote radio frequency unit in broadband wireless access system | |
| CN108601080A (en) | A kind of time synchronizing signal transmission method and device based on wireless communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |