CN213585795U - Dual-mode NTP timer based on GPS/CDMA - Google Patents
Dual-mode NTP timer based on GPS/CDMA Download PDFInfo
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- CN213585795U CN213585795U CN202022905629.4U CN202022905629U CN213585795U CN 213585795 U CN213585795 U CN 213585795U CN 202022905629 U CN202022905629 U CN 202022905629U CN 213585795 U CN213585795 U CN 213585795U
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Abstract
The utility model belongs to the technical field of the time service ware, concretely relates to bimodulus NTP time service ware based on GPS CDMA, include: the GPS receiving module is used for receiving a time signal transmitted by a GPS satellite system; a CDMA receiving module for receiving a standard time signal from a CDMA base station; and the input end of the MCU is electrically connected with the GPS receiving module and the CDMA receiving module respectively, and is used for analyzing the time signal received by the GPS receiving module or the CDMA receiving module and transmitting the standard time signal to the lower computer. The dual-mode NTP timer further comprises a power supply module, the power supply module is connected with the MCU, and the MCU controls the GPS receiving module and the CDMA receiving module to work or sleep by controlling the on or off of a circuit of the power supply module. The method overcomes the defects of the prior art, and the electronic system can obtain reliable and accurate time service by using the CDMA time service under the condition that the GPS signal is weak.
Description
Technical Field
The utility model belongs to the technical field of sliding vane air compressor, concretely relates to bimodulus NTP time service ware based on GPS CDMA.
Background
The network Time protocol ntp (network Time protocol) was proposed in 1982 by professor mlls David l of the university of telawa, usa, and was designed to deliver uniform and standard Time using internet resources. At present, much research work is carried out on time correction by using GPS signals, most of the research work is carried out by reading serial data decoded by a GPS module and extracting time information in the serial data to correct a system clock, the process does not involve the use of NTP, and the precision is low and is generally dozens to hundreds of milliseconds.
The GPS (Global Positioning System) is a new generation satellite navigation, time service, and Positioning System developed in the united states in the 70 th 20 th century. The 24 special GPS satellites are respectively provided with an atomic clock, and can broadcast accurate UTC standard time to the ground all the day. In addition to the position information, the data stream decoded by many general GPS decoding chips also contains time information (year, month, day, minute and Second) and a PPS (Pulse per Second), which identifies the starting point of the time information and has an accuracy of the order of microseconds.
The CDMA time receiving module, the unique CDMA receiver can be accurately synchronized with UTC (Greenwich mean time), it can obtain GPS time information by means of CDMA mobile phone mobile communication network, and as long as it can receive CDMA mobile phone communication signal, the CDMA timing system can stably output time and synchronous pulse with 10ms accuracy grade. Without knowing the exact location, without having to go through lengthy measurement transmission waiting. The CDMA timing system is started and operated quickly, a new base station can be locked quickly, and the CDMA timing system does not need to be externally connected with a user card and has no subsequent cost problem. Meanwhile, the antenna can be arranged in the GPS, and compared with the GPS, the problem of antenna installation is avoided, and the problem of antenna aging is avoided. The device can be applied to buildings and can also be placed in the machine box.
The CDMA timing system has stable signals and is not easily interfered by a power supply and external radio. Meanwhile, the work of other systems is not influenced. The installation is easy, the built-in receiving antenna is very convenient to be deployed in any place with CDMA signals.
In the actual place needing time service, if one of the GPS signal and the CDMA signal is weak and can not carry out correct time service, the single signal time service device can not work normally.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a bimodulus NTP time service ware based on GPS CDMA has overcome prior art's not enough, under the condition that GPS signal is than weak, carries out the time service through CDMA for the electronic system can obtain reliable, accurate time service.
In order to solve the above problems, the utility model adopts the following technical proposal:
a dual-mode NTP timer based on GPS/CDMA comprises
The GPS receiving module is used for receiving a time signal transmitted by a GPS satellite system;
a CDMA receiving module for receiving a standard time signal from a CDMA base station;
and the input end of the MCU is electrically connected with the GPS receiving module and the CDMA receiving module respectively, and is used for analyzing the time signal received by the GPS receiving module or the CDMA receiving module and transmitting the standard time signal to the lower computer.
Furthermore, the dual-mode NTP timer further comprises a power supply module, wherein the power supply module is connected with the MCU, and the MCU controls the work or the dormancy of the GPS receiving module and the CDMA receiving module by controlling the on or off of a circuit of the power supply module.
Furthermore, GPS and CDMA clocks are used for providing a synchronous clock source for the NTP service program, and the time is calibrated in a mode of combining serial data and second pulse.
Furthermore, the output end of the MCU is connected with an RTC module for acquiring accurate time information and transmitting the time information to the lower computer through the network interface module.
Furthermore, the output end of the MCU is connected with an LCD display module for displaying the current accurate time.
Compared with the prior art, the utility model, following beneficial effect has:
the utility model relates to a GPS/CDMA based dual-mode NTP time service device, which has novel structural design and simple and convenient operation; the electronic system can obtain reliable and accurate time service by setting the GPS receiving module and the CDMA receiving module, receiving time signals from the GPS and the CDMA and switching through the MCU.
Drawings
Fig. 1 is a schematic structural diagram of a dual-mode NTP time service device based on GPS/CDMA.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in FIG. 1, the utility model relates to a dual-mode NTP time service device based on GPS/CDMA, include
A GPS receiving module 10 for receiving a time signal transmitted by a GPS satellite system;
a CDMA receiving module 20 for receiving a standard time signal from a CDMA base station;
the input end of the MCU30 is electrically connected to the GPS receiving module 10 and the CDMA receiving module 20, respectively, and is configured to analyze the time signal received by the GPS receiving module 10 or the CDMA receiving module 20, and transmit the standard time signal to the lower computer.
In order to reduce power consumption, the dual-mode NTP timer further comprises a power module 40, the power module 40 is connected with the MCU30, and the MCU30 controls the GPS receiving module 10 and the CDMA receiving module 20 to operate or sleep by controlling the on/off of a circuit of the power module 40; when the GPS signal is stable, the CDMA receiving module 20 is switched off to enter the dormancy state, and the power consumption of the equipment is reduced.
In order to improve the precision, a GPS clock and a CDMA clock are adopted to provide a synchronous clock source for an NTP service program, and the time is calibrated in a mode of combining serial data and pulse per second; the second pulse time setting is responsible for the second time setting of the equipment, and the millisecond and the microsecond are reset; the serial data is responsible for time synchronization of the equipment year, month, day, hour, minute and second, and the serial data and the second pulse are mutually cooperated, so that accurate time service can be realized.
The output end of the MCU30 is connected with the RTC module 50 for acquiring accurate time information and transmitting the time information to the lower computer through the network interface module 60.
The output of the MCU30 is connected to the LCD display module 70 for displaying the current accurate time.
To sum up, a bimodulus NTP time service ware based on GPS CDMA, utilize GPS and CDMA clock to provide synchronous clock source for NTP service program, MCU30 can follow GPS receiving module 10, CDMA receiving module 20 received signal, under the weak condition of GPS signal, MCU30 automatic switch is to receiving signal from CDMA receiving module 20, and analyze out time data from it, show on LCD display module 70, and convey the next machine on through RTC module 50 and network interface module 60, adopt serial data and the mode that the second pulse combined together to come the alignment time, the timing precision is very improvement, thereby realize reliable, accurate time service.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (5)
1. A dual-mode NTP time service device based on GPS/CDMA is characterized in that: comprises that
The GPS receiving module is used for receiving a time signal transmitted by a GPS satellite system;
a CDMA receiving module for receiving a standard time signal from a CDMA base station;
and the input end of the MCU is electrically connected with the GPS receiving module and the CDMA receiving module respectively, and is used for analyzing the time signal received by the GPS receiving module or the CDMA receiving module and transmitting the standard time signal to the lower computer.
2. The dual-mode NTP timer according to claim 1, characterized by: the dual-mode NTP timer further comprises a power supply module, the power supply module is connected with the MCU, and the MCU controls the GPS receiving module and the CDMA receiving module to work or sleep by controlling the on or off of a circuit of the power supply module.
3. The dual-mode NTP timer according to claim 1, characterized by: GPS and CDMA clocks are used to provide synchronous clock source for NTP service program, and serial data and pulse per second are combined to calibrate time.
4. The dual-mode NTP timer according to claim 1, characterized by: the output end of the MCU is connected with an RTC module for acquiring accurate time information and transmitting the accurate time information to the lower computer through the network interface module.
5. The dual-mode NTP timer according to claim 1, characterized by: and the output end of the MCU is connected with an LCD display module for displaying the current accurate time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022905629.4U CN213585795U (en) | 2020-12-07 | 2020-12-07 | Dual-mode NTP timer based on GPS/CDMA |
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| CN202022905629.4U CN213585795U (en) | 2020-12-07 | 2020-12-07 | Dual-mode NTP timer based on GPS/CDMA |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113568300A (en) * | 2021-09-22 | 2021-10-29 | 深圳心派科技有限公司 | GPS time service method, device, electronic equipment and storage medium |
| CN115390429A (en) * | 2022-08-26 | 2022-11-25 | 中南大学 | Time service method and related equipment |
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2020
- 2020-12-07 CN CN202022905629.4U patent/CN213585795U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113568300A (en) * | 2021-09-22 | 2021-10-29 | 深圳心派科技有限公司 | GPS time service method, device, electronic equipment and storage medium |
| CN115390429A (en) * | 2022-08-26 | 2022-11-25 | 中南大学 | Time service method and related equipment |
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