Qinhuangdao Victor repairs American UniMeasure displacement sensors, American UniMeasure pull rope displacement sensors, American UniMeasure transmitters, American UniMeasure wire displacement transmitters, American UniMeasure wire position transmitters, and American UniMeasure wire valve position transmitters.
Qinhuangdao Victor has a "maintenance and inspection department" that can timely encounter and quickly solve various problems that arise during equipment use through maintenance services. Reduce the failure rate of equipment, improve the efficiency of equipment use, and make it more convenient, worry free, economical, and reassuring for customers to operate the equipment. Qinhuangdao Victor has multiple professional maintenance engineers with rich maintenance experience and good professional ethics, undertaking the maintenance and upkeep of various imported testing instruments.
UniMeasure wire sensor maintenance, wire displacement sensor is a commonly used type of sensor product, which has the advantages of compact structure, long measurement stroke, small installation space size, and high measurement accuracy. It has certain applications in multiple industries. Since it is widely used, what are the reasons for the problems that occur during use? Below is an analysis for everyone:
Cable displacement sensor: Sensor faults can be classified in the following ways.
1. Classified by the degree of sensor malfunction
According to the degree of sensor malfunction, it can be divided into hard faults and soft faults.
Hard faults refer to faults caused by structural damage, usually with large amplitudes and sudden changes; Soft faults generally refer to variations in characteristics, with small amplitudes and slow changes.
Hard faults are also known ascompletelyFault,completelyWhen there is a malfunction, the measured value does not change with the actual changes, but eventually maintains a certain reading. Usually, this constant value is usually zero or a large reading. The fault measurement value is roughly a horizontal straight line.
Soft faults include data deviation, drift, and decreased accuracy level. Soft faults are relatively small and difficult to detect. Therefore, in a sense, the harm of soft faults is greater than that of hard faults, and their harm has gradually attracted people's attention.
Cable displacement sensor
2. Classify based on the manifestation of the fault
According to the manifestation of the fault, it can be divided into intermittent faults and faults. Intermittent faults are sometimes good and sometimes bad; After the malfunction fails, it cannot be restored to normal.
3. Classify by the process of occurrence and development of faults
According to the process of occurrence and development of faults, they can be divided into sudden and gradual faults. The mutation fault signal has a large rate of change; The slow changing fault signal has a small rate of change.
4. Classify by the cause of the malfunction
According to the cause of the fault, it can be divided into deviation fault, impact fault, open circuit fault, drift fault, short circuit fault, periodic interference, and nonlinear dead zone fault.
Reasons for deviation faults: bias current or bias voltage, etc;
The causes of impact faults include random interference in power and ground wires, surges, spark discharges, burrs in D/A converters, etc;
Reasons for open circuit faults: broken signal lines, chip pins not connected, etc;
Reason for drift fault: temperature, etc;
Reasons for short circuit faults: bridge corrosion caused by pollution, short circuit of lines, etc;
Reasons for periodic interference: power supply 50 Hz interference, etc;
The causes of nonlinear dead zone faults include amplifier saturation, presence of nonlinear components, etc.
In addition, from the perspective of modeling and simulation, it can be divided into multiplicative faults and additive faults. For bias faults, add a constant or random small signal to the original signal; For impact interference, a pulse signal can be superimposed on the original signal; For short-circuit faults, the signal is close to zero; Open circuit fault, signal close to sensor output high value; Drift fault, where the signal deviates from the original signal at a certain rate; Periodic interference fault, where a signal of a certain frequency is superimposed on the original signal.