About the importance of sensors for spring torsion testing machines

Spring torsion test machineThe photoelectric sensor is controlled by converting the change in light intensity into changes in electrical signals. In general, photoelectric sensors are composed of three parts, which are divided into: transmitter, receiver and detection circuit.

The transmitter in the spring torsion tester sensor is aligned with the target emitted light beam. The emitted light beam generally comes from semiconductor light sources, light emitting diodes, laser diodes and infrared emitting diodes. The beam is emitted continuously, or the pulse width is changed. The receiver consists of photodiodes, phototriodes, and photocells. In front of the receiver, optical components such as lenses and apertures are installed. Behind it is the detection circuit, which filters out the valid signal and applies the signal.

What are the specific characteristics of the sensor of the spring torsion test machine? Linearity refers to the degree to which the actual relationship curve deviates from the fitted line between the sensor output and the input. Defined as the ratio of the deviation value between the actual characteristic curve and the fitted line over the full range to the output value of the full range. Sensitivity is an important indicator of the static characteristics of sensors. It is defined as the ratio of the increment of the output to the corresponding increment of the input that causes the increment. The phenomenon that the input and output characteristic curves of the sensor do not overlap during the period when the input quantity changes from small to large and the input quantity from large to small becomes hysteresis.

For input signals of the same size, the sensor's positive and reverse stroke output signals are not equal, and this difference is called the hysteresis difference value. Repeatability refers to the degree to which the obtained characteristic curve is inconsistent when the input quantity of the sensor changes continuously multiple times in the same direction. The drift of the sensor refers to the change of the sensor output over time when the input quantity remains unchanged, and the secondary phenomenon is called drift.http://www.hssdtest.com/