Velocity meter verification system

A technology of flow meter and calibration vehicle, which is applied in the direction of instrumentation, speed/acceleration/shock measurement, and speed/acceleration/shock measurement equipment testing/calibration, etc. It can solve problems affecting the normal operation of the system, difficult maintenance, complex structure, etc. Accurate speed regulation, small moment of inertia and high operating efficiency

Inactive Publication Date: 2015-05-27
姜韫英
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Problems solved by technology

[0003]In the past, DC motors were mostly used in the verification system of flow meters. Although the control of the DC speed control system is simple and the speed control performan

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[0013] As shown in the figure, the present invention includes a rectifier circuit, a capacitor filter part, an inverter, a PWM control part, a synchronous motor, a calibration vehicle, and a weighing part, and its structural points include a rectifier circuit, a capacitor filter part, an inverter, and a PWM control part. , the synchronous motor, and the verification vehicle are connected in sequence, the PWM control part is connected to the inverter, and the weighing part is connected to the verification vehicle; The output of the inverter circuit drives the synchronous motor to rotate at different speeds, and finally controls the running current circuit of the calibration vehicle in the current meter equipment to convert it into DC power. After being filtered by the capacitor, the DC power is converted into different frequencies through the inverter.

[0014] The PWM control part adopts MSP430 chip.

[0015] The invention also includes a lighting circuit, which is conne...

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Abstract

A velocity meter verification system belongs to the technical field of data acquisition. The invention especially relates to a velocity meter verification system. The invention provides a velocity meter verification system which has the advantages of high running efficiency and fast dynamic response. The velocity meter verification system comprises a rectifier circuit, a capacitor filter part, an inverter, a PWM control part, a synchronous motor, a verification vehicle, and a weighing part. The velocity meter verification system is structurally characterized in that the rectifier circuit, the capacitor filter part, the inverter, the PWM control part, the synchronous motor and the verification vehicle are connected in sequence; the PWM control part is connected with the inverter, and the weighing part is connected with the verification vehicle; and an inverting circuit converts constant-frequency and constant-voltage alternating-current power into three-phase bridge voltage-regulated alternating-current power, the synchronous motor is driven by the output of the inverting circuit to rotate at different speeds, a running flow circuit of the verification vehicle in velocity meter equipment converts the alternating-current power into direct-current power under control, and after capacitor filtering, the inverter inverts the direct-current power into different frequencies.

Description

technical field [0001] The invention belongs to the technical field of data acquisition, and in particular relates to a flow meter verification system. Background technique [0002] In recent years, with the application of computers in the verification of flow meters, people have paid more and more attention to the reliability and automation of the equipment. The research on the current meter verification system has very important significance in the water conservancy and hydrological system, and the speed regulation and speed stability of the current meter verification vehicle are always the main problems of the system research. [0003] In the past, DC motors were mostly used in the verification system of flow meters. Although the DC speed control system is simple to control and has good speed control performance, its complex structure, high cost, many faults, and difficult maintenance seriously affect the normal operation of the system. With the development of power elec...

Claims

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Application Information

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IPC IPC(8): G01P21/02
Inventor 姜韫英
Owner 姜韫英
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