The main advantages of KEYENCE photoelectric sensors:

The KEYENCE photoelectric sensor is a sensor that converts the change of measurement into a change in capacitance, which is essentially a capacitor with variable parameters.

The main advantages of KEYENCE photoelectric sensors:

　　Capacitive sensors offer the following advantages:

(1) High impedance, low power, only very low input energy.

(2) A large amount of change can be obtained, and then it has a high signal-to-noise ratio and system stability.

(3) The dynamic response is fast, the working frequency can reach several megahertz, the thick B contact measurement, and the DUT can be a conductor or a semiconductor.

(4) The structure is brief. It has strong adaptability, can work in harsh environments such as high and low temperatures, strong radiation, etc., and is widely used.

The shortcomings of KEYENCE photoelectric sensors such as susceptibility to disturbance and distributed capacitance have been overcome, and a grid displacement sensor and an integrated capacitive sensor have also been developed: it is therefore widely used in non-electric measurement and automatic detection to measure pressure, displacement, rotational speed, acceleration, A-degree, thickness, liquid level, humidity, oscillation, composition content and other parameters.

The output of a KEYENCE photoelectric sensor without an external load is called the zero output. The zero output is affected by the ambient temperature and changes with the temperature, which is known as the zero temperature drift. The intention of load cell zero temperature compensation is to eliminate or reduce zero temperature drift.

After the completion of the patch curing, post-curing, bridging and other processes, the KEYENCE photoelectric sensor needs to be compensated. The compensation process is mainly carried out zero point temperature compensation, zero output compensation, output sensitivity temperature compensation, output sensitivity consistency adjustment, output impedance consistency adjustment, transmission impedance consistency adjustment, etc. The following points should be paid attention to when compensating

1. KEYENCE Photoelectric Sensor Output Sensitivity Consistency Adjustment ProcessBefore the output sensitivity consistency adjustment process, the screws should be tightened first, and then loaded. When measuring the output sensitivity of the sensor, its linear error should be checked, and the measurement point should be no less than five points. After accounting, if the linear error exceeds the error, the fastening screw should be adjusted in time until the linear error meets the requirements, and then the sensitivity consistency adjustment should be made. If you don't do a linear view, you may not find out the linearity error until the later factory calibration, and the linearity error is no longer easy to adjust. If the tightening screw is adjusted at this time, the output sensitivity will change.

2. The zero output compensation of the KEYENCE photoelectric sensor should be strictly In the actual production, when the zero point compensation is carried out, the elastomer and the base have not been assembled, because the sensor is heavier after assembly, and it is very inconvenient to move back and forth. In order to meet the requirements of the first "resistance strain gauge load cell", to ensure that the zero point output value is within the taxi, the skill requirements of the zero point compensation two arts should be the zero point output value in the taxi. Spoon. Because after the elastomer and the base are assembled, it will be found that the zero point will drift, and the drift will reach tens of microvolts, which can be seen from the table. It should be clarified here that the preloaded zero output in the table is actually the small static load output of the sensor. The latter is the weight of the steel ball, the indenter and the ball, which will increase the zero output by a few microvolts.

The main advantages of KEYENCE photoelectric sensors:

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