Displacement-inductor type load sensor for hoisting measurement

Abstract

The invention relates to a displacement-inductance type load sensor for metering in hoisting. The displacement-inductance type load sensor comprises a shell (8), a circuit board (2), and the like; an isolating board (6) is fixedly arranged in the shell (8) and divides an inner cavity of the shell (8) into an upper part and a lower part; the circuit board (2) is arranged in an upper cavity of the shell (8); and a lower cavity of the shell (8) is provided with a pressure shaft (9), a large spring (7) and a sensing shaft (24). The displacement-inductance type load sensor is characterized in thatthe sensing shaft (24) comprises a sleeve (19), a guide rod (14), a magnetic core (15), a small spring (13), a coil rack (23), a primary coil (17), an upper secondary coil (16), and a lower secondarycoil (18); the upper end of the sleeve (19) is connected with the isolating board (6); the pressure shaft (9) is sleeved on the sleeve (19); the large spring (7) is sleeved on the pressure shaft (9);one end of the large spring (7) and the end wall of an inner cavity of the shell (8) are supported against each other; the other end of the large spring (7) and the step surface of the upper end of the pressure shaft (9) are supported against each other; and the lower end of the pressure shaft (9) extends out of the shell (8) and is connected with a tension supporting seat (11). The displacement-inductance type load sensor has the advantages of high measuring precision, compact structure, low electricity consumption, the hiding of a conversion circuit board, and impact resistance.

Description

technical field [0001] The invention relates to a sensor, in particular to a weight sensor capable of real-time measurement of lifting capacity, in particular to a displacement-inductive load sensor for lifting measurement. Background technique [0002] As we all know, when the lifting equipment lifts heavy objects, it often relies on the switch-type lifting capacity limiter for safety protection. When the lifting weight exceeds the rated lifting capacity of the lifting equipment, the lifting capacity limiter cuts off the circuit and stops lifting. The exact value of the weight is unknown. Sometimes expensive electronic scales are used to weigh the lifting weight. If each unit is configured, the cost is expensive, and the electronic scales cannot adapt to the dirty, wet, chaotic, and poor environments of various construction sites and are easily damaged; electronic tension sensors are also used Yes, but it needs to set up a set of electronic signal amplification and convers...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to design a displacement meter for lifting and measuring with high mechanical and electrical integration, simple structure, small volume, moderate price and working in the harsh environment of the construction site, aiming at the problem of difficult weight control and display during the construction site lifting process. - Inductive load sensors

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