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Time synchronization method and device for wireless sensor system based on distributed ble communication protocol

A technology of time synchronization device and communication protocol, which is applied in the direction of synchronization device, wireless communication, short-distance communication service, etc., and can solve problems such as unsuitable detection of blood pressure, poor accuracy, and increased cost of system time synchronization

Active Publication Date: 2019-06-14
GUANGDONG TRANSTEK MEDICAL ELECTRONICS CO LTD
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Problems solved by technology

Most of these methods are based on real-time wireless transmission, regardless of the delay and uncertainty of specific communication protocols
Moreover, this method requires the introduction of third-party devices other than the sensors, which increases the cost of time synchronization of the entire system
[0004] Due to the poor accuracy of current time synchronization, it is not suitable for blood pressure detection through PWTT

Method used

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  • Time synchronization method and device for wireless sensor system based on distributed ble communication protocol
  • Time synchronization method and device for wireless sensor system based on distributed ble communication protocol
  • Time synchronization method and device for wireless sensor system based on distributed ble communication protocol

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Embodiment Construction

[0023] Such as figure 1 Shown is a schematic flowchart of a time synchronization method for a wireless sensor system based on a distributed BLE communication protocol according to an embodiment of the present invention, the method mainly includes: a calculation step 102, a judgment step 104, a sending step 108, Receiving step 110, and adjusting step 112; in another embodiment, if the master node is not set in advance, the setting step 100 can also be included; in yet another embodiment, the second judgment step 106 can also be optionally included; In another embodiment, a verification step 114 is also optionally included.

[0024] The method according to the embodiment of the present invention is applicable to a wireless sensor system including a plurality of detection devices, each detection device includes a microprocessor and at least one sensor. Multiple sensors in the same detection device can realize time synchronization through clock correction of the microprocessor, a...

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Abstract

The invention discloses a time synchronization method and device of a wireless sensing system based on the distributed BLE communication protocol. The method comprises the following steps: calculating a time interval; judging whether time differences are synchronous or not; sending the current time, measurement data, and measurement time information corresponding to the measurement data; receiving the current time information, the measurement data and the measurement time information corresponding to the measurement data which have been sent and calculating a time difference between a master node and a slave node; and adjusting the measurement data of the slave node according to measurement time for which a master node clock is used as a reference. The time synchronization method and device of the wireless sensing system based on the distributed BLE communication protocol and an electronic sphygmomanometer of the device have the advantages that high requirements for the time synchronization of an ECG signal and a PPG signal during human blood pressure testing through pulse wave transit time (PWTT) can be satisfied, so that the ECG signal and the PPG signal are on the same time axis, and the accurate PWTT can be further obtained.

Description

technical field [0001] The present invention relates to a time synchronization method and device, in particular to a time synchronization method and device for a wireless sensor system based on a distributed BLE communication protocol and an electronic sphygmomanometer including the device. Background technique [0002] The main method of detecting human blood pressure through pulse wave transit time (PWTT) is to detect ECG and PPG signals (ie, electrocardiogram and photoplethysmography signals) synchronously, and then use these two sets of signals to mix and analyze to calculate PWTT, and then according to the correlation between PWTT and blood pressure The equation calculates the blood pressure value. To obtain accurate PWTT, it is necessary to ensure that the two sets of signals of ECG and PPG are on the same time axis (that is, synchronized), while PWTT is at the millisecond (ms) level, which means that this method of detecting human blood pressure requires time synchron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/80H04W56/00H04W84/18A61B5/021
CPCA61B5/02108H04W4/80H04W56/0015H04W84/18
Inventor 梁启光陈志敏
Owner GUANGDONG TRANSTEK MEDICAL ELECTRONICS CO LTD
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