Device and method for promoting stress field detection and node energy collection of expansion cylinder of elevator

Abstract

The invention relates to a device and method for promoting stress field detection and node energy collection of an expansion cylinder of an elevator and belongs to a device and method for the stress field detection of the expansion cylinder. A miniature wind-driven generator is integrally designed with a stress wireless sensor, working nodes and redundant nodes of the stress wireless sensor are fixed on the expansion cylinder of the elevator, a mixed structure of a lithium ion battery and the miniature piezoelectric wind-driven generator based on a wind-induced vibration mechanism is used for supplying power, aggregation nodes are fixed on a casing of an operation platform of the elevator, and the aggregation nodes are connected with an industrial personal computer through universal serial bus (USB) ports. The detection device has the advantages of being safe and reliable; avoiding influences on normal operation of a system even if a certain node breaks down due to the fact that a redundant structure is adopted by a sensor network; and adopting the mixed structure to provide power for the stress wireless sensor to enable each component to have complementary advantages to achieve permanent power supply of the sensor. A miniature piezoelectric wind-driven generator based on the wind-induced vibration mechanism does not need the rotating mechanism, is simple in structure and low in cost, and is combined with the lithium ion battery to form the mixed structure to save spaces.

Description

technical field [0001] The invention relates to a drum stress field detection device and method, in particular to a hoist drum stress field detection device and node energy collection device and method. Background technique [0002] At present, the monitoring of the operating state of the hoist is realized through the detection of the hoisting wire rope force. The detection methods of lifting wire rope tension include direct detection method and indirect detection method. The direct detection method is to install a wire rope tension detection device on the top of the lifting container, which is composed of a sensor, a signal acquisition module, a wireless transmission module and a storage battery. The detected steel wire rope tension signal is sent by the wireless transmitter module, received by the receiving module at the wellhead, and then processed to obtain the wire rope tension. There are mainly three kinds of sensors for detecting and wire rope tension: tension senso...

AI Technical Summary

Problems solved by technology

There are four main defects in the direct detection method: the transmission distance of wireless communication in the shaft is short, and when the depth of the shaft exceeds 500 meters, reliable communication cannot be achieved; the battery needs to be replaced regularly, which is inconvenient to maintain; the installation and maintenance of the sensor is inconvenient; the sensitivity of the tension sensor is low, The tension sensor will aggravate the fatigue wear of the wire rope, and the oil pressure sensor is only suitable for the occasion where there is a hydraulic balance device directly between the lifting container and the wire rope

Sensors are difficult, expensive to develop, and difficult to install

It is also difficult to detect in time when the sensor is destroyed

[0003] According to the above analysis, it can be found that the current method of reflecting the operating state of the hoist by detecting the tension of the hoisting wire rope mainly has the following defects: the installation of the sensor is inconvenient, and the maintenance of the detection system is difficult; the application of the detection system has certain limitations and cannot be applied to deep well detection; The battery-powered solution requires regular battery replacement, which is inconvenient to maintain; the existing sensors have problems such as high cost, low sensitivity, and damage to the wire rope

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