Transducer-specific strain gauges
TML gauges are not only used for strain measurement, but also as sensors for strain gauge-type transducers. Strain gauge-type transducers convert various types of physical quantities to mechanical strain in the stress-generating body (elastic body) and use strain gauges to convert mechanical strain to electric output. Strain gauge-type transducers are generally categorized into the following types.
- Force transducers (Load cell)
- Pressure transducers
- Acceleration transducers
- Displacement transducers
- Torque transducers
VARIOUS TYPE OF TML TRANSDUCER-SPECIFIC SRAIN GAUGES
- GAUGE SHAPE AND GAUGE LENGTH
Single, Rectangular 2-element, Torque(Shearing) strain measurement
|Pattern||Gauge length (mm)|
|90°2-element||2, 3, 6|
|Torque (Shearing strain) use||2|
2 types of 90°2-element gauge are lined-up with different pattern of gauge tab. CM-type has half-bridge configuration.
- GAUGE RESISTANCE
|Pattern||Gauge resistance (Ω)|
|Torque (Shearing strain) use||350|
*1000-ohm gauge has less power consumption in bridge circuit comparing to 350-ohm gauge’s and limits Joule’s heat generation.
- GAUGE BACKING MATERIALS
Unlike stress measurement gauges, the gauge backing materials for transducer-specific strain gauge cannot be determined based solely on the operational temperature and bonding method. To ensure maximum transducer performance, it is necessary to test various combinations using different stress-generating bodies (elastic bodies) to select the most suitable backing materials.Operational temperature
Operational temperature range differs from heat-resistive temperature's.
F series gauge (with epoxy backing) is also available for use of heat-curing type bonding adhesives.
|Gauge series||Gauge base materials||Operational temperature|
|F||Epoxy resin||-20~+80 (°C)|
|QF||Polyimide resin||-20~+200 (°C)|
|EF||Polyimide resin||-20~+200 (°C)|
- OPERATIONAL TEMPERATURE RANGE
- CREEP ADJUSTMENT
The creep characteristic is particularly important in force transducers. The most common compensation system uses the material creep (+) of the stress-generating body (elastic body) and the gauge creep (-) to cancel each other. Various TML strain gauges are available for creep adjustment and are selectable by creep code.
|Gauge creep||Large ---> Small|
- TEMPERATURE SENSITIVITY COMPENSATION