Servo-type reverse-pulling pre-stress detector

Abstract

The invention discloses a servo-type reverse-pulling pre-stress detector, and the detector comprises an oil tank, a displacement sensor, a centre hole jack, a control box, a combined valve body, a motor, and an intelligent terminal. The motor serves as a servo motor and a servo driver. The intelligent terminal and an industrial level wireless router integrated with a control circuit in the control box form a wireless local network. A pressure transmitter and the displacement sensor respectively transmit a pressure signal and a displacement signal to the control box, and an Ethernet communication module in the control box transmits the signals to the router. The signals are transmitted to the intelligent terminal through the router, and an instruction signal for hydraulic control is transmitted to the router in a wireless manner after processing. The instruction signal is transmitted to the Ethernet communication module in the control box through the router, and then is transmitted to the servo driver after processing, so as to control the servo motor to operate and to carry out hydraulic lifting and descending for pre-stress detection. The detector employs a servo motor, so the system can guarantee the detection precision, is good in adaptability, improves the detection efficiency, and prolongs the service life. Wireless communication is employed between the intelligent terminal and the control box, so the detector is good in operation flexibility.

Description

technical field [0001] The invention relates to a servo type anti-pull method prestress detector. Background technique [0002] The effective prestress under the anchor after the prestressed tendon is stretched is affected by the performance index of the prestressed tendon itself, its own weight, the friction resistance of the prestressed tendon and the pipe wall, the friction resistance of the prestressed tendon and the bell mouth, and the friction of the prestressed tendon and the anchor fixture. Friction resistance, prestress loss of prestressed tendons after stretching and retraction, and efficiency coefficient among multiple prestressed tendons. [0003] The existing anti-tension prestress detectors often use ordinary motors, stepper motors or variable frequency motors as the driving mechanism, resulting in the following problems: [0004] ⑴The motor has high calorific value and high noise, which cannot adapt to the harsh outdoor environment with heavy oil pollution, l...

AI Technical Summary

Problems solved by technology

[0004] ⑴The motor has high calorific value and high noise, which cannot adapt to the harsh outdoor environment with heavy oil pollution, large temperature difference and high temperature

[0005] ⑵Using ordinary motors, stepping motors or variable frequency motors to control the oil pressure rise and fall, the accuracy is not high, and the stepping motor has a step-out problem, which cannot guarantee the detection accuracy

[0006] (3) The dynamic response time of motor acceleration and deceleration is long, the detection time is long, the detection efficiency is low, and the service life of the equipment is shortened

[0008] ⑸The oil temperature during work is high, so that the continuous operation time of the equipment is very limited, and the continuous operation under the condition of high oil temperature will greatly shorten the service life of the equipment

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