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Overview
What is a strain sensor?
This is a sensor that measures strain (= the amount of deformation (expansion, contraction) of an object). By knowing the strain, it is possible to estimate the force applied to the object. It is attached directly to objects such as metal and can detect minute changes.
What is the semiconductor strain sensor STREAL?
Macnica 's STREAL semiconductor strain sensor is ultra-compact, highly accurate, and low-power. Conventional large-scale strain measurement systems have been integrated onto a semiconductor chip measuring just 2.5mm square, dramatically improving ease of integration into equipment. To facilitate smooth integration into customer equipment, the sensor is provided in a module format equipped with a semiconductor chip. STREAL is available in two series. The SR500 series features a measurement resolution of 0.1με or less, improved insulation due to its ceramic material, improved temperature compensation resolution, and a self-diagnosis function, making it ideal for industrial machinery requiring precise control, such as robots and machine tools. The SR300 series features low power consumption and is suitable for a variety of applications, including IoT.
exterior
*Apply adhesive to the adhesive surface of STREAL and attach it to the object to be measured.
* We offer two types of adhesive surfaces: 10.5mm x 10.5mm and 7mm x 7mm.
Module Types
Aswith the SR300, we have commercialized two types of modules with different chip mounting angles.
Outline specifications
| item | Specifications (common to tension, compression and shear) | |
| Power supply voltage (VDD) | Compatible with 3.3V/5.0V (VDD=5.0V required when using analog output) | |
| Operating Temperature Range | -20℃～70℃ | |
| Output format | Analog output/digital output (SPI) | |
| resolution | ±0.1με (communication bandwidth: 1kHz) | |
| Built-in AD converter | 16bit resolution | |
| Built-in temperature sensor
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Resolution: 1/256℃ Measurement range: -40 to +120°C |
|
| Terminals |
Total of 12 pins |
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Terminal configuration No. Terminal name Function 1 STBYB Standby control terminal 2 VDD Power supply pin 3 VREGAO Analog circuit power output pin 4 NC NC pin 5 AGND Analog GND 6 AOUT Analog voltage output 7 SDI SPI data input 8 SDO SPI data output 9 CSB SPI Chip Select 10 SCK SPI Clock Input 11 VREGD Digital circuit output terminal 12 DGND Digital GND |
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| Built-in features |
・Offset correction - Offset temperature compensation Sensitivity correction - Sensitivity temperature compensation - Self-diagnosis function to detect errors in the internal circuit state - Noise reduction function (change the OSR setting of the AD converter *) *Oversampling rate |
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If you would like to learn more about the SR500 series, please submit the form below to download the datasheet.
Adhesion and connection information
| item | content |
| Adhesion method | Epoxy-based heat-curing adhesive is recommended. |
| Adhesive surface | 10.5 x 10.5 mm or 7 mm x 7 mm can be attached to a flat surface (cannot be attached to a curved surface) |
| Recommended Connector | Hirose Electric FH52K-12S-0.5SH |
Evaluation kit configuration
Macnica offers an evaluation kit that allows you to immediately begin initial evaluation and PoC of STREAL. The evaluation kit itself is common to both the SR300 and SR500 series, and by adding an SR500-compatible conversion board, it can be flexibly used with both series. Using the evaluation kit reduces risks and hurdles in the initial evaluation stage, allowing you to smoothly proceed with operation checks on the actual device.
Evaluation kit accessories list
| Constitution | quantity | detail |
| Evaluation kit main body | 1 piece | Evaluation board (with dedicated plastic case) |
| wireless receiver | 1 piece | Receiver connected to evaluation PC for wireless communication |
| Extension cable (1m) | 1 bottle | Used to extend the cable between the STREAL module and the evaluation kit. (Can be extended up to 3m) |
| USB cable (1m) | 1 bottle |
Used to connect the evaluation PC and the evaluation kit via USB communication Can also be used to supply power from a mobile battery during wireless communication |
| SR500 compatible conversion board |
1 bottle |
Conversion board for use with the SR500 series |
|
STREAL module |
1 piece |
Strain sensor STREAL main unit When you purchase the evaluation kit, you can choose one of the following items: ①SR500 tension/compression type (adhesion area: 10.5mm square) ②SR500 shear type (adhesion area: 10.5mm square) 3. SR500 tension/compression type (adhesion area: 7mm square) ④SR500 shear type (application area: 7mm square) |
|
CD-ROM |
1 sheet |
①User's Manual ② Microcomputer firmware ③Evaluation application |
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