Displacement Measurement

Run-Out/Vibration

There are many ways to measure run-out/vibration including the type of measurement system, run-out or vibration (direction), and environment where the system is being installed. Choosing the wrong kind of equipment can lead to drastic consequences. You can run into issues such as increased man-hours during production and issues with insufficient precision.

Example Applications

Run-out measurement of HDD surface

Laser displacement sensors are very helpful in measuring the oscillation at a single point on a specific target’s exterior. The further away that vibration amplitude is from the center of rotation from a target, the more it increases. This makes fluctuations in height much easier to capture. Keep in mind that vibration measurements must be implemented at a sampling rate of at least ten times the targets oscillation frequency. Otherwise, you may run into issues.

Vibration measurement of ultrasonic welding machines

To measure peak-to-peak values of the run-out, you must use a peak-to-peak hold or something with a similar functionality. Just like with the run-out measurements of HDD surfaces, vibration measurements must be executed at a sampling rate of at least ten times the targets oscillation frequency.

Residual vibration measurement of robots

Any laser beam that is expanded in line form will be diffusely reflected from the surface of a target object. The reflected profile that’s created is then formed on the HSE3-CMOS. It’s then possible to measure the run-out of a target by detecting changes in the position and shape of the reflection.

If you’re going to begin a measurement with a 1D laser displacement sensor, it’s essential that you understand that the peak can’t be captured at all times if the point of the peak shifts to the left or right. This issue can be remedied, by using a 2D laser displacement sensor to track the peak at all times. Measurements can only take place at a sampling rate of at least ten times the oscillation frequency.

Eccentricity

There are a number of ways to measure eccentricity. Keep these crucial factors in mind: the type of measurement system being used and the environment where you’re doing the installation process. Always remember that selecting the wrong type of equipment can cause issues such as increased man hours during the production period and insufficient precision.

Sample Applications

Eccentricity measurement of high-precision rollers

The laser must be angled so that it points directly at the apex of the circle in order to capture fluctuations in distance through the process of high-speed sampling.

To perform a proper roller gap measurement, it must be conducted at a sampling rate of at least ten times the rotation speed. Anything else may lead to inaccurate readings. As the shaft diameter decreases, errors may occur because the apex position does not remain still. It may shift to the left or right because of eccentricity.

Eccentricity measurement of motor shafts

You can capture fluctuations in the edge positions through the process of high-speed sampling. You can ascertain the peak-to-peak value of the run out by utilizing the peak-to-peak hold or something of a similar fashion. To attain a proper measurement, it must be performed at a sampling rate that’s at a minimum ten times the rotation speed.

Eccentricity Measurement of Sponge Rollers

You can measure eccentricity by locating fluctuations at multiple specified points from the picture acquired utilizing the 2D optical projection method. The circumference can be measured by protrusions and the run-out of V grooves. Furthermore, the run-out of a point that has been predetermined from the end can also be measured.

Positioning

When considering the best way to go about measuring positioning, there are a number of factors to keep in mind, which includes the type of measurement system that will be used as well as the environment in which the system is being installed. Make sure to select the right type of equipment that will adequately meet your needs. Otherwise, you may have to deal with increased man-hours during the production period and insufficient precision.

Example Applications

Positioning of boards

The line laser is used to gain a profile of the target and proceeds to measure the actual position of the target object based on the obtained shape. Keep in mind that position measurement can occur even if the sensor head is installed perpendicular to the direction that the target is moving.

Positioning of high-precision stages

To measure the distance to the target being measured, the sensor irradiates the target from the same position that it’s moving. Using sensor heads selectively will enable you to perform long-range measurements and control. Also, using a micro head displacement sensor can lead to a savings in space.

Positioning of liquid crystal PC boards

In this instance, the edge positions of a target that is passed between the sensors is measured. With this method, even transparent targets can be measured in a stable manner. Simply change the detection threshold values of the target.

Measuring Edge Position

As you’re searching for the best method to measure meandering/edge, you should always consider the type of measurement system that will be used and the installation environment where the system will be installed. You should always consider the type of equipment that you’ll be using. Choosing the wrong type of equipment for the wrong kind of job can lead to increased man-hours during the production process and insufficient precision.

Example Applications

Meandering measurement of rubber sheets (measurement of thru-beam model)

Target fluctuations and edge position are measured for objects located within the beam. Know that detection thresholds can be adjusted manually so that you can gain the most stable measurement possible. This is even the case for transparent targets.

Meandering measurement of rubber sheets (measurement with reflective model)

To create a profile, the laser line must reflect off of a target object. This is done to monitor edge position fluctuations. When performing this measurement, it can be taken from either the side or above of the target. You can measure both height fluctuations and edge position at the same time. Also, you can measure edge meandering from a distance.

Gap/Clearance

When you’re searching for the best way to go about measuring gap/clearance, you should keep these critical factors in mind: the type of measurement system being used, the environment where the system is being installed, and the shape and material of the target object. Also, make sure to use the right type of equipment. Selecting the wrong kind of equipment can lead to increased man-hours during the production process and insufficient precision.

Sample Applications

Gap measurement of touch panels

Measuring transparent bodies can lead to unexpected results if you don’t know what to look out for. When analyzing transparent bodies, the laser illuminates the target from above. In this manner, gaps can be measured by light that’s transmitted through the body.

Sensor head selection is important

These two questions must be asked: can a measurement be performed stably even if the two surfaces have different reflectance? Is the minimum gap (at least) provided so that the two surfaces can be identified?

Gap measurement between rolls

Gap is determined by measuring the width of the light that is transmitted. Both gap and roll run-out be can measured at the same time. Also, you need to clear space on both the left and right sides for the installation process.

Gap measurement of rolls and blades

A profile of the target is created when the laser line reflects back to the sensor. You can then measure features such as gaps and step heights from the profile that’s obtained from this process. With the position correction function, the gaps of tilted targets can even be measured. Also, step height and gap measurement can be taken simultaneously.