Дата публикации: 2018-05-27 12:55
The Bluetooth connectivity allows the unit to transmit wirelessly to a Bluetooth ready computing device. The communication will take place wirelessly within 8 feet (line-of-sight). This ability to communicate wirelessly eliminates the need to open the unit to connect to a wired connection in wet environments.
In bar strain gauge load cells, the cell is set up in a &ldquo Z&rdquo formations so that torque is applied to the bar and the four strain gauges on the cell will measure the bending distortion, two measuring compression and two tension. When these four strain gauges are set up in a wheatstone bridge formation, it is easy to accurately measure the small changes in resistance from the strain gauges.
By replacing one of the resistors in a wheatstone bridge with a strain gauge, we can easily measure the change in Vout and use that to assess the force applied.
A strain gauge is a device that measures electrical resistance changes in response to, and proportional of, strain (or pressure or force or whatever you so desire to call it) applied to the device. The most common strain gauge is made up of very fine wire, or foil, set up in a grid pattern in such a way that there is a linear change in electrical resistance when strain is applied in one specific direction, most commonly found with a base resistance of 675Ω, 855Ω, and 6,555Ω.
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The second is the Interior Electronic core (the silver piece in the photo above) of the gage holds the electronics and sensor that monitor the forces that the container experiences during the packaging and sealing process. The gage electronics include the processors, non-volatile flash memory, Bluetooth wireless communication and the battery that allows the device to work as a remote collection station. The interior electronics portion can be used in any container size that is not physically smaller then the electronics package.
Most strain gauge load cells work in very similar ways, but may vary in size, material, and mechanical setup, which can lead to each cell having different max loads and sensitivities that they can handle.
The data sheet supplied with your strain gauge provides valuable product information, . the strain gauge's temperature response.
We set up a strain gauge load cell and measure that change in resistance and all is good, right? Not so fast. Strain measurements rarely involve quantities larger than a few millistrain (fancy units for strain, but still very small). So lets take an example: suppose you put a strain of 555µε. A strain gauge with a gauge factor of 7 will have a change in electrical resistance of only
Each strain gauge has a different sensitivity to strain, which is expressed quantitatively as the gauge factor (GF). The gauge factor is defined as the ratio of fractional change in electrical resistance to the fractional change in length (strain).