Timing method and system of intelligent electric meter terminal
A smart meter and timing system technology, applied in time division multiplexing systems, electrical components, multiplexing communications, etc., can solve problems such as low precision, failure to work, inaccurate timing information, etc., and achieve high clock accuracy , low cost and high timing accuracy
Inactive Publication Date: 2019-04-26
BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY +1
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Problems solved by technology
IEEE1588 has high precision and is easy to implement, but it requires a wired network. If there is a problem with a certain level of network, its secondary network will not be able to complete the timing. In particular, if there is a problem with GMC information transmission, the entire network will not work
Once the network is abnormal, it will not work
Due to the existence of multipath signals during air dictation, the transmission delay cannot be accurately measured, so the timing information is not accurate and the precision is not high
Method used
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[0032] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.
[0033] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.
[0034] image 3 It is a timing process under a normal network connection state according to an embodiment of the present invention. The timing process when the network connection status is normal includes steps S11-S13.
[0035] In step S11, the highest master clock obtains clock information from the GNSS satellite signal and sends it to the subordinate master clock: the highest master clock receives and processes the sat...
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The invention discloses a timing method and system of an intelligent electric meter terminal. The method includes steps: the intelligent electric meter terminal transmits Chirp signals; a plurality ofintelligent power grid gateways receive the Chirp signals transmitted by the intelligent electric meter terminal, each intelligent power grid gateway reproduces the received Chirp signals and transmits the reproduced Chirp signals and processing time delay information of the Chirp signals by the intelligent power grid gateway to the intelligent electric meter terminal together, the intelligent electric meter terminal receives the Chirp signals transmitted back by each intelligent power grid gateway and calculates the distance between the intelligent electric meter terminal and each intelligent power grid gateway according to information of the received Chirp signals and the processing time delay information; and the intelligent electric meter terminal calculates a clock skewing accordingto the distance and the position of each intelligent power grid gateway and updates a local clock of the intelligent electric meter terminal. According to the timing method and system of the intelligent electric meter terminal, a timing mode in an abnormal network state is provided, namely, electric meter terminal autonomous positioning timing is adopted, the frequency change of the Chirp signalscan be accurately measured, and the timing precision is high.
Description
technical field [0001] The invention relates to the field of smart grids, in particular to a method and system for timing service of smart electric meter terminals. Background technique [0002] Timing means that the system obtains time information from an accurate clock source, modulates and sends it out according to a certain data format. The receiving end processes the received signal in real time to complete precise synchronization, thereby analyzing the current time information and adjusting the local clock so that each clock source has a unified time reference. [0003] At present, the timing methods of smart grid mainly include satellite timing, IEEE1588 timing, air interface timing and so on. [0004] In the satellite timing method, the GNSS (Global Navigation Satellite System) satellite writes the satellite clock and orbit data into the navigation message and sends it to the ground receiver. The receiver processes satellite signals to obtain its own position and p...
Claims
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IPC IPC(8): H04J3/06
CPCH04J3/0641H04J3/0644H04J3/0682
Inventor 陈永利李思超李洪强刘佳迪赵旭唐晓柯赵亚红
Owner BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY