A flow device commutator intelligent detection and control system and method

Abstract

The invention relates to an intelligent detection and control system and method for a commutator of a flow device; the system of the invention comprises an industrial computer, a camera, a PCI board, a signal conditioning board, a stepping motor driver, a stepping motor, a commutator, a photoelectric Switches, standard tables. The invention adopts an electric commutator whose operation process is controllable, and adopts image processing technology to automatically identify the state of the commutator. Precise adjustment, adjust the commutator to a very accurate position, even non-professional technicians can quickly repair the commutator according to the prompt of the computer, reducing the maintenance cost. The standard position of the commutator of the present invention is the working position of the commutator when the uncertainty of the commutator is not greater than 0.006%, and the uncertainty of the flow device is at the leading domestic level.

Description

technical field [0001] The invention belongs to the field of flow detection and control, in particular to an intelligent detection and control system and method for a commutator of a flow device. Background technique [0002] Flow measurement is widely used in energy, environmental protection, medicine, trade, process control and other fields. The water flow device is one of the calibration equipment used by the metering department and flowmeter manufacturing enterprises for value transfer, traceability and calibration testing. It is of great significance to ensure the quality of flowmeter products and the development of new flowmeters. [0003] The uncertainty of the flow device is a very important technical index, which directly affects the calibration accuracy of the flow meter. The uncertainty of the flow standard device is mainly related to the electronic scale and the commutator. When the electronic scale is selected, the uncertainty of the flow standard device is mai...

AI Technical Summary

Problems solved by technology

[0005] 1 Failure to detect the commutator in time will affect the calibration and verification of high-precision flowmeters

[0006] 2 If the commutator fails, experienced professional and technical personnel are required to go to the site for fault diagnosis and maintenance

[0007] 3. The existing technology of the commutator of the flow device is generally pneumatic, and the movement process is uncontrollable; the electric commutator uses the characteristic of adjustable speed of the stepping motor to control the operation of the commutator, which can achieve a high level of uncertainty, but the flow device After a period of operation, the symmetry of the commutator changes, affecting the uncertainty level of the flow device

The symmetry of the commutator is determined by the signal sent by the photoelectric switch. When the photoelectric switch shutter installed on the commutator shaft rotates to the position of the photoelectric switch, the photoelectric switch sends a control signal to control the commutation of the commutator, but the photoelectric switch The position of the shutter sometimes changes. Now the position of the photoelectric switch shutter is manually adjusted. The technician needs to climb to a very high place where the commutator is installed, and observe the working positions of the left and right sides of the commutator with eyes. Asymmetrical, one person first manually adjusts the position of one side of the commutator and fixes it, and the other person adjusts the photoelectric switch block installed on the commutator shaft. Sometimes when fixing the photoelectric switch block, the position of the side of the commutator Changes have taken place, and sometimes it needs to be repeated many times to meet the requirements, resulting in low efficiency in adjusting the asymmetry of the commutator, requiring more maintenance personnel, and even causing asymmetry on both sides of the commutator due to eye-catching errors, which affects the flow device. Uncertainty levels affect the calibration and verification of high-precision flowmeters

Images