Wireless Sensor Unit Vibration Damping for Machine Diagnostics
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Solution Overview
Problem
Conventional machine diagnostic data collection methods are hazardous, unreliable, and time-consuming due to the use of cables, which can lead to technician injuries, damaged equipment, and inaccurate data collection, especially when dealing with machines having moving parts.
Innovation Solution
A wireless machine diagnostic data collection system comprising a portable data collection unit and a wireless sensor unit that transmits vibration and other diagnostic data in real time, minimizing the risk of cable damage and technician errors, while maintaining accurate frequency response through elastomeric damping and mechanical construction to reduce noise and vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cables are used to connect sensors to data collection devices, then data transmission is reliable, but technician safety is compromised and data collection time increases
Solution Approach 1:
The patent removes the cable connection entirely from the sensor system. The sensor unit operates independently and transmits data wirelessly to the data collection device, eliminating the physical cable that posed safety risks to technicians working near moving machine parts.
Solution Approach 2:
The patent replaces the mechanical cable connection with a wireless communication system. The sensor unit uses wireless transmission (such as radio frequency communication) to send data to the data collection device, substituting the mechanical cable-based system with an electromagnetic field-based system that eliminates physical hazards.
2Reliability
If cables are used for sensor connection, then data can be collected, but cable damage occurs and maintenance frequency increases
Solution Approach 1:
The patent extracts the cable component from the sensor system entirely. The sensor unit communicates wirelessly with the data collection device, removing the cable that was subject to damage from repeated connections, disconnections, and relocation between machines and facilities.
Solution Approach 2:
While not directly applicable to the sensor unit itself, the wireless architecture eliminates the need for durable, long-service-life cables. The system accepts that the sensor unit may be relocated frequently but designs it to be wirelessly removable without cable wear concerns, effectively treating the connection as disposable rather than requiring long-term durability.
3Ease of operation
If technicians manually identify and position sensors at test points, then data collection can be performed, but technician errors occur and measurement accuracy decreases
Solution Approach 1:
The patent incorporates automated identification systems that provide feedback to the technician. The system can automatically identify test points on machines and guide the technician to the correct sensor mounting locations, reducing human error in identifying and positioning sensors while maintaining operational flexibility.
Solution Approach 2:
The sensor unit is designed to be self-identifying and self-configuring to some extent. The system automatically detects the sensor's location and characteristics, reducing the need for manual identification and positioning by the technician, thereby improving measurement precision while maintaining ease of installation.
4Object-affected harmful factors
If wireless sensor units with internal electronics are used, then cable hazards are eliminated, but sensor unit mass and volume increase affecting frequency response
Solution Approach 1:
The patent carefully controls the physical parameters of the sensor unit, specifically its mass and volume, to minimize their impact on frequency response. The wireless sensor unit is designed with compact electronics and optimized housing to keep added mass low, and the mounting system is designed to minimize the sensor's mechanical influence on the measurement point, thereby maintaining measurement precision while eliminating cable hazards.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enhances operator safety, improves data reliability, and reduces collection time by eliminating cable-related hazards and errors, ensuring accurate machine performance monitoring and predictive maintenance.
Implementation Method 1
The sensor unit includes vibration dampening materials, such as elastomeric members, to reduce frequency response impacts
Data Source
AI summary
A sensor unit is configured as a single body, removably mounted in its entirety to a test point location on a machine so machine vibrations propagate into the single body. Within are an accelerometer, circuit board, wireless interface, signal processor, and battery. The sensor unit transmits sensor data wirelessly in real time to a data collection unit. A technician with data collection unit in hand goes from machine to machine, along a route of multiple test point locations on multiple machines, mounting and dismounting the sensor unit and collecting machine vibration data. The sensor unit is configured to reduce frequency response impacts of the mass and volume of the circuit board, wireless interface, signal processor, and battery on dynamic behavior of the sensor unit with respect to machine vibrations to achieve a frequency response rating comparable to a wired sensor.