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Multirange full automatic high precision pull control system

A tension control and control system technology, applied in the general control system, control/regulation system, program control, etc., can solve the problems of a single tension sensor range requirement, more pure manual control, low power accuracy and power consumption requirements of the tension sensor, etc.

Inactive Publication Date: 2011-03-16
大连基准机电设备有限公司
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  • Abstract
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: in order to be applicable to the calibration of some instruments or meters including liquid level gauges, and to overcome the lack of a good man-machine interaction interface in the existing calibration equipment, the tension sensor has a single range requirement, There are many pure manual controls, and the accuracy of input signal acquisition, the accuracy of tension sensor power supply and power consumption are not high enough. The purpose of this invention is to provide a multi-range fully automatic high-precision tension control system

Method used

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  • Multirange full automatic high precision pull control system
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  • Multirange full automatic high precision pull control system

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Embodiment Construction

[0018] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0019] exist figure 1 Among them, the chip used for A / D conversion is ICL7135, the CPU of the control board is W77E58, and the CPU of the handheld device is WW77E516. The communication between the two units is realized through the RS485 bus connection, and the positive and negative directions of the stepping motor are controlled respectively through two manual lines. Turn, the handheld communicates with the computer through RS232. EEPROM stores calibration and calibration parameters, and the power supply part mainly provides digital and analog isolated 5V voltage for chips and devices and 10V standard power supply for tension sensors. The 9 buttons (UP, DOWN, LEFT, RIGHT, CHECK / SAVE, STOP / DEL, ENT, ESC, MODE) in the handheld operator can realize the corresponding verification operation.

[0020] exist figure 2 A...

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Abstract

The invention provides a multirange full automatic high precision pull control system, belonging to the technical field of automatic control. The invention is characterized in that the control system is mainly composed of a control panel and a manual operator, wherein, the input signal collection of the control panel adopts differential complete floating circuit design, utilizes a high-impendencecommon-mode interference amplifying circuit, selects an AD chip of ICL 7135 with conversion frequency of 500KHz and inversion period of 80ms which is integral multiples of a power frequency interference period, and also selects dual-integral AD conversion method to effectively inhibit the interference of power frequency; a transformer is designed with the isolation of power and is used for filtering, and also has the function of DC-DC digital analogy isolation; median filtering technology is used for the software; the power part of a control panel sensor adopts an OP07 transmittal circuit, Darlington crystal valve driving, isolation filtering technology and MC 1403 as reference source. The invention has the advantages that verification of instruments or meters comprising liquidometer can be realized; good man-machine interactive interfaces are provided; the precision of signal acquisition can reach plus or minus 0.2 per mille; the precision of 10 V standard power of the tensile sensorcan reach plus or minus 2 mV, and the power is 250 mW.

Description

technical field [0001] The invention belongs to the technical field of automatic control and relates to a multi-range fully automatic high-precision tension control system, in particular to a liquid level meter calibration multi-range fully automatic high-precision tension control system. Background technique [0002] At present, the known calibrator includes pressure calibrator, temperature calibrator, transformer calibrator, etc., which are mainly used to test the accuracy of various equipment or instruments, but basically there is no tension control in these calibrating equipment. Some systems lack a good human-computer interaction interface; most of the calibration equipment with tension control systems have a single requirement for the range of the tension sensor, and most of them are purely manual control, and the accuracy of input signal acquisition, the accuracy and power consumption of the tension sensor power supply are not high. , There are relatively few calibrat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D15/01G05B19/042
Inventor 李卓函安毅徐高峰唐云龙李亚芬
Owner 大连基准机电设备有限公司
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