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Vibrating wire displacement sensor (crack meter)
Product Name:MLZXS Vibrating wire surface crack meter (displacement sensor)
Product Summary:

The vibrating wire crack meter is a kind of non-electrical measurement sensor that is widely valued and widely used at home and abroad. It includes a heat-treated vibrating wire detection element, one end is connected with the vibrating wire, and the other end is connected with a sliding rod and is formed by a stress-relieved spring. As the sliding rod is pulled, the spring begins to stretch and causes the tension of the vibrating wire to increase, and the vibration frequency of the steel wire changes accordingly, and the tension is proportional to the elongation of the spring. Therefore, the change of displacement can be realized by measuring the tension of the steel string, that is, the change of the vibration frequency of the steel string. Since the vibrating wire sensor directly outputs the natural vibration frequency signal of the vibrating wire, it has the characteristics of strong anti-interference ability, little influence by electrical parameters, little zero drift, little influence by temperature, stable and reliable performance, vibration resistance, long life and so on.

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1. Overview of vibrating wire surface crack meter (displacement sensor):
 
The vibrating wire crack meter is a kind of non-electrical measurement sensor that is widely valued and widely used at home and abroad. It includes a heat-treated vibrating wire detection element, one end is connected with the vibrating wire, and the other end is connected with a sliding rod and is formed by a stress-relieved spring. As the sliding rod is pulled, the spring begins to stretch and causes the tension of the vibrating wire to increase, and the vibration frequency of the steel wire changes accordingly, and the tension is proportional to the elongation of the spring. Therefore, the change of displacement can be realized by measuring the tension of the steel string, that is, the change of the vibration frequency of the steel string.
 
Since the vibrating wire sensor directly outputs the natural vibration frequency signal of the vibrating wire, it has the characteristics of strong anti-interference ability, little influence by electrical parameters, little zero drift, little influence by temperature, stable and reliable performance, vibration resistance, long life and so on.
 
2. Application fields of vibrating wire surface crack meter (displacement sensor):
 
 
Vibrating wire crack meter is used to measure the opening and closing degree of joints, such as: cracks in buildings, dams, bridges, pipelines, rocks, concrete, soil, roads, workshops, tunnels, underground caverns and model tests, etc. .

Item name

MLZXS-XXXmm-X

Measure range

25,50,100,150,200mm

Resolution

0.025%FSR

Linearity

0.25%FSR

temperature zero drift

<0.05%FSR/℃

stability

<0.2%FSR/year

Frequency Range

1600~2700hz

Temperature range

-20°C~+80°C

Coil resistance

180Ω±10Ω

waterproof level

IP65

Thermistor

When in 25℃  is 3000Ω

 

 

Vibrating wire surface crack meter (displacement sensor) matters needing attention:

 
●The instrument should work within the rated measurement range.
 
●When installing the instrument cable, try to keep the cable away from the source of electrical interference such as: engine, transformer, spot welder, power line, motor and so on. It is not allowed to bury or lay the cables together with the AC cables, otherwise the instrument cable will sense electrical interference signals of other frequencies, which will bring trouble to the instrument to obtain stable readings.
 
●When connecting long cables according to the needs of the site, pay attention to the reliable waterproof sealing at the joints.
 
●Be careful in handling and installation of the instrument, and avoid violent vibration. Avoid any mechanical damage or deformation of the instrument or parts, and focus on protecting the sensor, measuring rod and its connection port from damage and deformation
 
●The lead cable of the instrument can reach 1000 meters (sold separately). The user does not specify when ordering, and the wiring is 2 meters long before leaving the factory.
 
●When the instrument has not been used for more than 12 months, it should be re-calibrated before use.
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