Multi-Sensing Transducer Interference Fit Mounting
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Solution Overview
Problem
Existing multi-sensing technologies fail to effectively measure acceleration, strain, vibration, and temperature within a single embedment housing, lacking comprehensive coverage of these parameters and reliable attachment methods.
Innovation Solution
A multi-sensing transducer that integrates accelerometers to measure acceleration and vibration in three mutually perpendicular planes, along with a strain gauge, within a single housing, utilizing an accurate interference fit for mounting and reinforcement with a bonding agent, and includes internal amplification and telemetry for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single embedment housing is used to measure multiple parameters (acceleration, strain, vibration, temperature), then the versatility and integration of the sensing system is improved, but the device complexity and manufacturing precision requirements increase
Solution Approach 1:
The patent combines multiple sensing functions (acceleration, strain, vibration, temperature measurement) into a single embedment housing that integrates an accelerometer, strain gauge, and temperature sensor. This merging approach allows all parameters to be measured from one unified structure, improving versatility while managing complexity through functional integration.
Solution Approach 2:
The embedment housing is designed as a universal platform that can simultaneously perform multiple measurement functions. The housing itself serves as both the structural element to be monitored and the container for multiple sensors, enabling it to measure acceleration, strain, vibration, and temperature through different sensing mechanisms integrated within the same structure.
2Measurement precision
If an accurate interference fit is used to mount the transducer in the receptor hole, then the mechanical stability and measurement precision are improved, but the manufacturing precision requirements and difficulty of installation increase
Solution Approach 1:
The transducer barrel is pre-designed with specific dimensional tolerances to achieve the desired interference fit. The barrel dimensions are precisely controlled during manufacturing to ensure proper fit with the receptor hole, shifting the precision requirement to the transducer fabrication process rather than the field installation process.
Solution Approach 2:
The interference fit parameters (clearance, interference amount, material properties) are carefully selected and controlled to achieve the optimal balance between mechanical stability and installation feasibility. By adjusting these parameters, the system achieves reliable mounting without requiring excessive manufacturing precision.
3Measurement precision
If the barrel is used to transmit force, heat, and acceleration parameters, then the sensor response accuracy is improved, but the reliability of the anchorage decreases
Solution Approach 1:
The barrel is designed to simultaneously perform multiple functions: transmitting force to the strain gauge, conducting heat to the temperature sensor, and transmitting acceleration to the accelerometer. This multi-functional design improves measurement accuracy for all parameters while the bonding agent provides additional anchorage reinforcement to maintain reliability.
Solution Approach 2:
The system uses a combination of materials with different properties: the barrel material is selected for its mechanical and thermal conductivity properties to ensure accurate parameter transmission, while the bonding agent provides chemical adhesion to reinforce anchorage. This composite approach allows each material to optimize its specific function.
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
Enables precise and comprehensive measurement of acceleration, strain, vibration, and temperature parameters with enhanced thermal conductivity and mechanical stability, providing consistent strain gauge output and accurate data transmission.
Implementation Method 1
The transducer is easily mounted on the body (BODY) to be monitored by dint of an accurate interference fit between the transducer's barrel and the receptor hole
Implementation Method 2
it is therefore advisable in some cases to reinforce the anchorage of the housing H by a bonding agent around the circumference of the housing
Implementation Method 3
The sleeve (SL) will also enhance the thermal contact between the BODY and the Barrel (B) and SL is likely to be made from brass, copper or some similar highly heat conductive material thus also serving to enhance the thermal conductivity
Data Source
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AI summary
A device is described whereby the accurate machining of a metallic barrel/cylinder and it's ability to form an interference fit into an accurate hole can provide for an easily attached/installed instrument into a body who's parameters are to be measured. On a housing, physically part of the barrel, and in the barrel itself are bonded/attached sensing components, which can measure electronically, the parameters to be measured. These parameters are seen as being force/strain, temperature, vibration and acceleration. These components are strain gauges, temperature sensors and accelerometers as shown in the accompanying drawings. The sensor also has an inbuilt electronic amplifier and other electronics to digitise and data reduce the outputs of the sensors. There is also capacity to carry a dry cell voltage power source. The unit can also transmit digitised data via a telemetry system. An alternative mechanical system involving the barrel, a sleeve made of more resilient material than the barrel, and the body is also described. The intention is to provide a more consistent electrical output from installation to installation and provide good thermal conductivity from the body to the barrel/temperature sensor.