Design And Implementation Of A Wearable Bluetooth Voltage Detection System For The Safety Of Electrical Operations

Voltage detection is an important operation to ensure the safety of electrical operations,and the current study on voltage detection equipment can be divided into contact voltage detection and non-contact voltage detection.With the increase of voltage level of charged equipment,non-contact voltage detection technology has been widely studied and implemented due to its high safety.In the current study of noncontact voltage detection,on one hand,the equipment cannot be applied to voltage detection of different voltage levels,which results in its poor versatility.On the other hand,the devices’ MAC address need to be known in advance to complete the communication by establishing a Bluetooth connection,which leads to poor flexibility and difficulties in extension.Moreover,mentioned design often includes only one single voltage measurement point,which may increase the risk of missing detection,and does not consider low power consumption.To address the problems mentioned above,this thesis introduces and implements a Bluetooth voltage detection system for non-contact measurement,which uses the voltage induced by the induction probe in the electric field generated around the charged equipment to demonstrate whether the operator locates in the safety zone.To address the issue of the versatility problem of previous equipment,this thesis designs a built-in voltage gain adjustment module.The voltage gain adjustment module is controlled by software,and the measurement range can be automatically switched in the process of electricity checking,which can satisfy the requirement of various voltage levels measurement.A digital low pass filter is also designed to keep the stable of induction voltage measurement at the same time.To address the issue of limited voltage measurement points,the low flexibility and scalability of expansion in establishing Bluetooth connections,the thesis uses Bluetooth broadcasting for communication.The Bluetooth broadcast method does not require the knowledge of the devices’ MAC address in advance and can be easily extended to the joint measurement of multiple inductive probes.In the meanwhile,the design of the Bluetooth device identifier can distinguish different Bluetooth voltage detection devices,cooperate with the mobile APP to obtain and analyze the multi-modal data,and perform the corresponding alarm action.In addition,this thesis further takes power consumption into consideration and designs sleep and wake-up mode for the proposed system as a way to reduce power consumption.According to the experimental results,the proposed Bluetooth voltage detection system has a total circuit current no more than 5μA in sleep mode,which meets the goal of low power consumption.Moreover,the designed induction probe can achieve a stable measurement for induction voltage,and different induction probes can be distinguished with the mobile APP.Furthermore,the induction probe can provide the measurement with multiple points and form rigid demand combining with the work suit at the same time due to its small volume and wearable.This thesis introduces and implements a Bluetooth voltage detection system for the safety of electrical operations,and proposes to improve the design of current equipments,which has poor versatility,poor flexibility and difficulties in extension.The testing results show that Bluetooth voltage detection system can achieve the target demand for near-electric alarm.At present,the proposed Bluetooth voltage detection system has been initially put into use in the Southern Power Grid and is expected to be widely used in power maintenance operations in the future.