Internet of Things instrument clock timing device

Abstract

The invention discloses an Internet of Things instrument clock timing device, and relates to the technical field of timing devices. The Internet of Things instrument clock timing device solves the problems of low timing accuracy and reliability. The device comprises a watchdog counting unit, a calculation processing unit, a timing comparison unit, a processing comparison clock unit, a network clock acquisition unit and a watchdog initial value register. When the Internet of Things intelligent water meter system connected to the timing device is reset and restarted, the watchdog clock is not influenced, so that the stable operation of the system is ensured, the reliability of the system in the operation process is ensured, and meanwhile, the advantage of low power consumption can also be achieved. The timing device automatically calibrates the unit duration of the internal clock according to the network time through a comparison calibration mode of the network clock and the internal clock, has higher precision and more automatic clock setting capability, ensures that a system timing task is accurately completed within the timing time, and achieves the advantage of higher timing accuracy.

Description

technical field [0001] The invention relates to the technical field of timing devices, in particular to a clock timing device for an Internet of Things instrument. Background technique [0002] Low-power Internet of Things smart water meters use Internet of Things technology to transmit data collected by water meters to the Internet of Things platform through GPRS communication. At present, low-power Internet of Things smart water meters are mainly divided into 2G, 3G, 4G, NB_IoT low-power IoT Networked water meters. Among them, 2G, 3G, and 4G low-power IoT water meters deal with low power consumption by cutting off the power of the IoT communication module and sleeping the main control chip to achieve low power consumption. Since NB_IoT technology has long-term network attachment capability, the low power consumption method of NB_IoT low-power IoT water meter is to use NB_IoT module and main control chip to sleep to achieve low power consumption. The entire low-power IoT ...

AI Technical Summary

Problems solved by technology

[0003] In the entire operation mechanism of the low-power Internet of Things smart instrument, it is required that the Internet of Things timing clock device can run stably and accurately time. Since most of the existing timing devices use clock chips or internal timers of single-chip microcomputers, etc., during the operation of the system The system is reset due to external reasons, or the clock operation is deviated due to internal and external crystal oscillator precision problems, or the clock operation is inaccurate due to the aging of the device over time, making low-power IoT smart meters Failure to report electricity at the reporting time will affect the use and promotion of low-power IoT smart meters

Therefore, there is a problem of low timing accuracy and reliability in the prior art

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