What is the use of the sensitivity coefficient pm of a fiber optic sensor

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Some companies write pm, while others write pm, reflecting the relationship between strain and wavelength change.

If the pm is large, it means that the sensitivity is high (1 microstrain is reflected as a wavelength change of n pm), but due to the fiber optic sensor.

The wavelength variation range is limited, typically at 2-10 nm, so an increase in sensitivity leads to a decrease in range.

Fiber optic sensors with a large range are either made of special fibers (which means expensive) or sensitivity is sacrificed. Therefore, when considering this parameter, it is necessary to fully weigh the sensitivity, range and bearing capacity you need to decide which product to choose. If the salesperson tells you that a product has a large range, high accuracy, and is cheap, it can basically be concluded that he is fooling you.

Also, precision and sensitivity are not equal, although the two concepts seem to be similar. Linearity in the fiber optic sensor.

It can be considered to be approximately the same as when the repeatability is good.

This is the main parameter for the design of FBG strain sensors.

Hello! Android and above support the magnification gesture function. After enabling the magnification gesture function, you can zoom in or out of the screen content by triple-tapping the screen to facilitate operation, but the current design of this function may not fully match the user's habits, which may cause the illusion that the touch screen is not sensitive.

To cancel the magnified gesture function, please go to the "Settings" interface, tap "Accessibility > Magnified gestures", and turn off the "Magnified gestures" switch.

1. Install software similar to Mobile Manager and 360 Mobile Phone Guard, after opening the software, there is a mobile phone acceleration function, this function will close the unused programs running in the background, and play a role in speeding up the mobile phone.

2. Restart the phone, after restarting the phone, the program running in the background will not start, and it will also solve the problem of the phone slowing down.

3. If the mobile phone screen film is very poor, it will also cause the touch screen to be insensitive. If it is an IPS hard screen, you can consider not sticking the film.

If the above methods can't solve the problem, you can only find after-sales service to see if there is a problem with the touch screen.

Sensors can be calibrated from a PLC or other external device. Performing the preset function at regular intervals from an external input ensures stable detection even in harsh environments. The use of dual-output sensors provides a low-brightness signal in heavily soiled situations.

When adding a sensor, the power supply is supplied from the side connector. This reduces the need for two wires per sensor, making installation faster and cleaner.

Zeroing out display values has never been easier. Just press the preset and right buttons at the same time.

Keyence's engineers are currently developing a communication device that will connect the FS-NEO directly to an open network. This makes it easy to read and write various settings.

When the drift is adjusted to the level of the water surface, the highest drift sensitivity at this time is 0 mesh, but you can't observe the drift upward.

Above 0 mesh, the higher the number of meshes, the lower the sensitivity.

In general, we switch to 2 mesh fishing and 3 or 4 mesh.

Do you see "Printers and Other Hardware" on the control panel?

The mouse is inside.

It should be a picometer per microstrain, which means that the wavelength of the fiber grating drifts by one picometer when there is 1 microstrain.

At present, as far as the domestic technology is concerned, the optical fiber sensor refers to the fiber grating sensor! The sensitivity of the FBG material itself: temperature 10pm, strain micro-strain.

The fiber grating is encapsulated and calibrated to become a fiber grating sensor, and if the sensitization package is not carried out, the sensitivity is the sensitivity of the grating itself, and there is no change. It can also be packaged according to the customer's needs to achieve the required sensitivity!