System for indirectly measuring flow and pressure of constant displacement pump driven by permanent magnet servo motor
A permanent magnet servo motor and measurement system technology, applied in the field of manufacturing, can solve problems such as slow response speed, low output signal frequency, and use environment restrictions
Active Publication Date: 2012-08-08
HUBEI SPACE LONG MARCH EQUIP
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Problems solved by technology
In addition, the pressure sensor and flowmeter also have installation and sealing problems, and the flowmeter also has the problem of maximum operating pressure.
[0008] 2) Slow response
For the small flow turbine flowmeter, due to the small flow, the number of turbine blades is small, the output signal frequency is low, and its response speed is slower
[0009] 3) The use environment is limited
For flow and pressure measurement, the flow signal and pressure signal must be converted into electrical signals. These live measuring devices cannot be used in explosion-proof environments. If explosion-proof products are used, the cost will be greatly increased, and independent pressure and flow measurement devices will be used more. cost
Method used
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[0025] Such as figure 1 As shown, this embodiment provides a permanent magnet servo motor-driven quantitative pump flow-pressure indirect measurement system, including: permanent magnet servo motor, servo drive, quantitative oil pump, fuel tank, Hall voltage sensor, Hall current sensor, oil Liquid temperature sensor, data acquisition control card, and host computer. Their connection relationship is as follows: the servo driver is connected to the permanent magnet servo motor through the Hall voltage sensor and Hall current sensor, the permanent magnet servo motor is connected to the quantitative oil pump, and the quantitative oil pump is connected to The fuel tank and the load, the fuel tank is connected with the oil temperature sensor, and the data acquisition control card is respectively connected with the Hall voltage sensor, the Hall current sensor, the servo drive, the oil temperature sensor and the host computer.
[0026] The permanent magnet servo motor adopts constant ...
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The invention discloses a system for indirectly measuring flow and pressure of a constant displacement pump driven by a permanent magnet servo motor. The system comprises a permanent magnet servo motor, a servo driving machine, a constant displacement oil pump, a Hall voltage sensor, a Hall current sensor, an oil temperature sensor, a data acquisition control card, and a host computer. A measurement model is established in the invention, wherein the model takes stator-side voltage and current in the servo motor and oil temperature as input and takes flow and pressure signals of the constant displacement pump as output. The indirect measurement of pressure and flow signals which are relatively difficult to measure is realized through measuring voltage, current, and temperature signals which are relatively easy to measure. The measurement of voltage, current, and temperature has advantages of stability, accuracy and reliability which are inherited by the system. In addition, the system of the invention further has advantages of fast dynamic response, no restriction from service environment, etc.
Description
technical field [0001] The invention belongs to the field of manufacturing, and in particular relates to an indirect measurement system for output flow and pressure of a servo-driven hydraulic source, which can be used for flow and pressure control of a hydraulic system. Background technique [0002] The electro-hydraulic control system is widely used due to its excellent characteristics such as fast response speed, high control precision, convenient speed regulation, and large power-to-volume ratio. Pressure and flow are two very important parameters of the hydraulic system. In actual electro-hydraulic control, some need to control the speed of the actuator, that is, control the flow of liquid flowing into the actuator; some need to control the load pressure. Control; some need to control the system power, no matter what kind of control needs to measure the pressure and flow. [0003] Flow measurement usually uses a flowmeter. There are many types of flowmeters. According ...
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Inventor谷立臣贾永峰
OwnerHUBEI SPACE LONG MARCH EQUIP