The Wuhan Digital Pet Co., Ltd

Lei Fang

Bo Zhang

A data transmission and control device in a multi-node sensor network, comprising a processing control module (). The processing control module () comprises an instruction processing unit, a data processing unit, at least one group of first-type interfaces (J-J), at least one group of second-type interfaces (J-J), one group of fifth-type interfaces (J) and one group of sixth-type interfaces (J). The fifth-type interfaces (J) have communication connections with an external control device (). The first-type interfaces (J-J) respectively have communication connections with a sensor () so as to cooperate with the instruction processing unit to configure and query a parameter of the sensor (), and to upgrade firmware and report feedback information of the sensor () and the processing control module. The second-type interfaces (J-J) respectively have communication connections with the sensor () and the sixth-type interfaces (J) have communication connections with an external service terminal () so as to cooperate with the data processing unit to acquire data of a plurality of sensors () and transmit the data to the external service terminal () for processing. The device controls the sensor () via a network, enables the data of the sensor () to be modular, and provides a uniform interface to the outside, thus forming a smart control platform for dynamic configuration, data processing and external interaction of the sensor ().

Data transmission and control device in a multi-node sensor network

A method and a structure for determining a global clock among systems are disclosed. When a standardized time reference is required among systems, a reference clock source may transmit a calibration signal, and a transmitting time T(0) may be recorded. Each system may respectively record an arrival time T(n), transmit a return signal to a signal recording unit of the reference clock source, and record a transmitting time T(n), after receiving the calibration signal. Similarly, because of different distances, the signal recording unit may record arrival times T(n) of the return signals subsequently, and determine time delays Delay (n) between systems and the reference clock source respectively. When all the systems are required to have a completely standardized time reference, a corresponding Delay (n) may be acquired and transmitted to each system. Each system may determine zero deviations T(n) of various local clocks from the reference clock source, and take T(n) as a correction parameter to correct its own system clock, so that the local clocks of all the systems have a completely standardized time reference.

Method and structure for determining global clock among systems

A method and a device for providing a global clock in a system, the terminals in the system are channel connected to each other via paths, each terminal is communicatively connected to a clock source ultimately via a signal recording unit, respectively, the clock source sends a calibration signal to the network, the signal recording unit records the current transmitting time T () of the calibration signal, each terminal will receive the calibration signal sequentially due to different distances from the clock source and will return the signal, the backward signals are returned to the signal recording unit along the network sequentially, and the signal recording unit records the time T (n) of each backward signal sequentially, in this way, the signal recording unit can then measure the delay between each terminal and the clock source signal, which can be used as a correction parameter to ensure that all terminals are in exactly the same time reference, in addition, in this way, there is no need to control the length of the clock cables from each terminal to the clock source, and no special consideration is required for clock routing, and difficulties in system assembly, calibration, maintenance and expansion brought by large amounts of cable are avoided.

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Hubei, China

Lei Fang