Wireless Microseismic Sensor with Flameproof Enclosure

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Solution Overview

Problem

Conventional wired microseismic monitoring technologies face challenges in monitoring rockbursts near excavation surfaces due to difficulties in sensor placement, data transmission line damage, and limited power supply, leading to incomplete data collection and reduced monitoring efficiency.

Innovation Solution

An integrated sensing-acquisition-wireless transmission system with a flameproof enclosure housing the acquisition instrument, battery, and wireless transmitter, along with a novel fixation device using expandable plates and friction teeth, allows flexible sensor placement and extended operation through wireless signal transmission and optimized power management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If wired transmission is used for microseismic monitoring, then data transmission reliability is improved, but sensor placement flexibility deteriorates and monitoring coverage is reduced

Engineering Contradiction:

Improvedata transmission reliabilityVSAvoidsensor placement flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent replaces the mechanical wired transmission system with a wireless transmission system using antennas and electromagnetic waves. This substitution eliminates the need for physical cables, enabling sensors to be placed in locations that were previously inaccessible due to cable routing constraints, thereby improving sensor placement flexibility while maintaining data transmission capability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces wireless communication modules and antennas as intermediary components between the sensors and the data collection system. These intermediaries enable data transmission without direct physical connections, resolving the contradiction between transmission reliability and placement flexibility by providing an alternative transmission medium

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If sensors are placed near the excavation surface for better monitoring coverage, then monitoring effectiveness is improved, but risk of damage from flying stones and construction activities increases

Engineering Contradiction:

Improvemonitoring effectivenessVSAvoiddamage risk from flying stones

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

By replacing wired connections with wireless transmission, the patent eliminates the vulnerability of exposed cables to damage from flying stones and construction equipment. The wireless system allows sensors to be positioned in protective locations while maintaining monitoring effectiveness, as no physical cables need to traverse hazardous zones

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If wireless transmission is implemented, then sensor placement flexibility is improved, but power consumption increases and working cycle is shortened

Engineering Contradiction:

Improvesensor placement flexibilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic data transmission instead of continuous transmission, where sensors collect data and transmit it at predetermined intervals. This periodic action significantly reduces power consumption compared to continuous wireless transmission, extending the working cycle of battery-powered sensors while maintaining placement flexibility

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system maintains continuous monitoring capability through periodic measurements and transmissions, ensuring that useful action (data collection) continues without interruption while optimizing energy usage. The sensors remain active and ready to detect events continuously, but communication occurs periodically to conserve power

Inventive Principle:

Principle #20Continuity of useful action

4Reliability

If data transmission lines are routed through the tunnel vault, then sensor connectivity is improved, but probability of line damage by locomotives increases

Engineering Contradiction:

Improvesensor connectivityVSAvoiddamage probability by locomotives

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical cable routing system through the tunnel vault with a wireless transmission system. This substitution eliminates the physical transmission lines that would be vulnerable to locomotive damage, while maintaining sensor connectivity through electromagnetic wave transmission that is not affected by tunnel traffic

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS11169289B2Sensing-acquisition-wireless transmission integrated microseismic monitoring system and method

Publication Date: 2021.11.09 HUBEI SEAQUAKE TECH CO LTD

AI summary

The present invention discloses a sensing-acquisition-wireless transmission integrated microseismic monitoring system, comprising a sensing unit, wherein the system further comprises an acquisition-wireless transmission unit. The acquisition-wireless transmission unit comprises a flameproof enclosure, an acquisition instrument, a battery, a wireless transmitter and a transmitting antenna. A push nut is arranged at an open end of the flameproof enclosure. A support stage is sheathed on an outer wall of the flameproof enclosure. A connection ring is movably sheathed on the open end of the flameproof enclosure. The push nut is connected to the connection ring. Multiple inner wing elastic plates are circumferentially arranged on the connection ring. The inner wing elastic plates are connected to corresponding expandable plate outer wings, respectively. The present invention further discloses a sensing-acquisition-wireless transmission integrated microseismic monitoring method.