CN201935957U

CN201935957U - Intelligent digital AC millivoltmeter based on voltage measurement

Info

Publication number: CN201935957U
Application number: CN2011200453802U
Authority: CN
Inventors: 周国雄; 李琳
Original assignee: Central South University of Forestry and Technology
Current assignee: Central South University of Forestry and Technology
Priority date: 2011-02-23
Filing date: 2011-02-23
Publication date: 2011-08-17
Anticipated expiration: 2021-02-23

Abstract

The utility model relates to an intelligent digital AC millivoltmeter based on voltage measurement, which comprises a SPCE061A16 bit singlechip, an LCD display module, an OCMJ4X8C LCD, a keyboard,, an amplification circuit and an A/D data acquisition circuit, a basic circuit, an AT89S52 singlechip, a DDS chip AD9854 main circuit, an amplification circuit, a regulated power supply, a filter and a display device. The intelligent digital AC millivoltmeter is characterized in that the SPCE061A16 bit singlechip is connected with the LCD display module, the SPCE061A16 bit singlechip, the amplification circuit and the A/D data acquisition circuit, the basic circuit, the AT89S52 singlechip, the DDS chip AD9854 main circuit, the amplification circuit, the filter and the display device are connected in sequence. The intelligent digital AC millivoltmeter has good voltage measurement function, and can be applied widely.

Description

A kind of intelligent digital ac millivoltmeter based on voltage measurement

Technical field

The utility model relates to the intelligent digital ac millivoltmeter, is specially a kind of intelligent digital ac millivoltmeter based on voltage measurement.

Background technology

In electric measurement, voltage is a very important parameters, the magnitude of voltage of measure analog signals how exactly, it is one of content of Electrical Measuring Instrument research always, used Digital AC milivoltmeter mostly is mean value detection intelligent digital ac millivoltmeter at present, exist and measure big, the bigger problem of drifting about when measuring small-signal of nonsinusoidal signal error, cause instrumental sensitivity to be restricted.

The utility model content

The technical matters that the utility model solved is to provide a kind of intelligent digital ac millivoltmeter based on voltage measurement, to solve the shortcoming in the above-mentioned background technology.

The technical matters that the utility model solved realizes by the following technical solutions:

A kind of intelligent digital ac millivoltmeter based on voltage measurement, comprise 16 single-chip microcomputers of SPCE061A, LCD shows module, the OCMJ4X8C liquid crystal, keyboard, amplifying circuit and A/D data acquisition circuit, basic circuit, the AT89S52 single-chip microcomputer, DDS chip AD9854 main circuit, amplifying circuit, stabilized voltage supply, wave filter and display device, 16 single-chip microcomputers of described stabilized voltage supply and SPCE061A, amplifying circuit and A/D data acquisition circuit, basic circuit, the AT89S52 single-chip microcomputer, DDS chip AD9854 main circuit, amplifying circuit links to each other, 16 single-chip microcomputers of described SPCE061A show that with LCD module links to each other, described AT89S52 single-chip microcomputer is connected with OCMJ4X8C liquid crystal and keyboard, 16 single-chip microcomputers of described SPCE061A, amplifying circuit and A/D data acquisition circuit, basic circuit, the AT89S52 single-chip microcomputer, DDS chip AD9854 main circuit, amplifying circuit, wave filter is connected in order successively with display device.

In the utility model, the chip in described amplifying circuit and the A/D data acquisition circuit is two kinds of chips of AD620, TLC2543.

Beneficial effect:The utlity model has voltage measurement function preferably, voltage measurement is highly sensitive, is widely used.

Description of drawings

Fig. 1 structure diagram of the present utility model.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Referring to Fig. 1, a kind of structure diagram of the intelligent digital ac millivoltmeter based on voltage measurement, a kind of intelligent digital ac millivoltmeter based on voltage measurement, comprise 16 single-chip microcomputers 1 of SPCE061A, LCD shows module 2, OCMJ4X8C liquid crystal 3, keyboard 4, amplifying circuit and A/D data acquisition circuit 5, basic circuit 6, AT89S52 single-chip microcomputer 7, DDS chip AD9854 main circuit 8, amplifying circuit 9, stabilized voltage supply 10, wave filter 11 and display device 12, described stabilized voltage supply 10 and 16 single-chip microcomputers 1 of SPCE061A, amplifying circuit and A/D data acquisition circuit 5, basic circuit 6, AT89S52 single-chip microcomputer 7, DDS chip AD9854 main circuit 8, amplifying circuit 9 links to each other, 16 single-chip microcomputers 1 of described SPCE061A show that with LCD module 2 links to each other, described AT89S52 single-chip microcomputer 7 is connected with OCMJ4X8C liquid crystal 3 and keyboard 4,16 single-chip microcomputers 1 of described SPCE061A, amplifying circuit and A/D data acquisition circuit 5, basic circuit 6, AT89S52 single-chip microcomputer 7, DDS chip AD9854 main circuit 8, amplifying circuit 9, wave filter 11 is connected in order successively with display device 12, and the chip in described amplifying circuit and the A/D data acquisition circuit 5 is AD620, two kinds of chips of TLC2543.

During operation, basic circuit 6 links to each other with the survey position, the electric signal that produces of the position of surveying be transferred to amplifying circuit through basic circuit 6 and A/D data acquisition circuit 5 is realized the amplification of signals and electric signal is converted into digital signal, the digital data transmission that transforms back formation is to 16 single-chip microcomputers 1 of SPCE061A, 16 single-chip microcomputers of SPCE061A 1 can be handled transmitting the digital signal of coming, LCD shows that module 2 is used to show the operating mode of 16 single-chip microcomputers 1 of SPCE061A, finish measuring process, simultaneously, the electric signal that produces of the position of surveying be transferred to AT89S52 single-chip microcomputer 7 through basic circuit 6, after AT89S52 single-chip microcomputer 7 is handled the electric signal that is transferred to, control DDS chip AD9854 main circuit 8 produces sinusoidal waveform, the sinusoidal waveform that DDS chip AD9854 main circuit 8 produces is exaggerated when passing through amplifying circuit 9, output is on display device 12 after sinusoidal waveform process wave filter 11 filtering after being exaggerated, finish output procedure, described stabilized voltage supply 10 guarantees 16 single-chip microcomputers 1 of SPCE061A, amplifying circuit and A/D data acquisition circuit 5, basic circuit 6, AT89S52 single-chip microcomputer 7, DDS chip AD9854 main circuit 8, work under normal stable voltage with amplifying circuit 9, described OCMJ4X8C liquid crystal 3 shows the operating mode of AT89S52 single-chip microcomputer 7 in real time, keyboard 4 can send instruction to AT89S52 single-chip microcomputer 7.

More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model; the technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. intelligent digital ac millivoltmeter based on voltage measurement, comprise 16 single-chip microcomputers of SPCE061A, LCD shows module, the OCMJ4X8C liquid crystal, keyboard, amplifying circuit and A/D data acquisition circuit, basic circuit, the AT89S52 single-chip microcomputer, DDS chip AD9854 main circuit, amplifying circuit, stabilized voltage supply, wave filter and display device, it is characterized in that, 16 single-chip microcomputers of described stabilized voltage supply and SPCE061A, amplifying circuit and A/D data acquisition circuit, basic circuit, the AT89S52 single-chip microcomputer, DDS chip AD9854 main circuit, amplifying circuit links to each other, 16 single-chip microcomputers of described SPCE061A show that with LCD module links to each other, described AT89S52 single-chip microcomputer is connected with OCMJ4X8C liquid crystal and keyboard, 16 single-chip microcomputers of described SPCE061A, amplifying circuit and A/D data acquisition circuit, basic circuit, the AT89S52 single-chip microcomputer, DDS chip AD9854 main circuit, amplifying circuit, wave filter is connected in order successively with display device.

2. a kind of intelligent digital ac millivoltmeter based on voltage measurement according to claim 1 is characterized in that, the chip in described amplifying circuit and the A/D data acquisition circuit is two kinds of chips of AD620, TLC2543.