CN204515006U

CN204515006U - A kind of eight railway digital System of voltage acquisitions

Info

Publication number: CN204515006U
Application number: CN201520036295.8U
Authority: CN
Inventors: 何乃龙
Original assignee: Nanjing University of Information Science and Technology
Current assignee: Nanjing University of Information Science and Technology
Priority date: 2015-01-19
Filing date: 2015-01-19
Publication date: 2015-07-29
Anticipated expiration: 2025-01-19

Abstract

The utility model discloses a kind of eight railway digital System of voltage acquisitions, comprise micro controller module, voltage acquisition module, clock module, reseting module, display module, analog-to-digital conversion module and power module; Described voltage acquisition module connects micro controller module by analog-to-digital conversion module, described clock module, reseting module and display module are connected on the corresponding port of micro controller module, and described power module is micro controller module, voltage acquisition module, clock module, reseting module, display module, analog-to-digital conversion module provide required power supply.The utility model precision is high, antijamming capability is strong, good, the integrated convenience of extensibility.

Description

A kind of eight railway digital System of voltage acquisitions

Technical field

The utility model relates to a kind of System of voltage acquisition, particularly relates to a kind of eight railway digital System of voltage acquisitions, belongs to voltage acquisition control field.

Background technology

Digital voltmeter (Digital Voltmeter) is called for short DVM, and it adopts Digital Measuring Technique, is continuous print analog quantity and DC input voitage to be converted to discontinuous, discrete digital form and the instrument shown.Why the instrument of this electronic surveying occurs, on the one hand because the application of robot calculator is generalized to the field of the Experiments of Automatic Control research of system gradually, propose and various observed amount or controlled variable converted to digital requirement, namely in order to control in real time and the needs of data processing; On the other hand, the development of robot calculator, has driven the progress of Pulse and Digital Circuits technology, for the appearance of digital instrumentation provides condition.So the producing and developing of digitized measurement instrument and the development of robot calculator have close ties.In decades recently, along with the development of semiconductor technology, integrated circuit (IC) and microprocessor technology, digital circuit and Digital Measuring Technique there has also been huge progress, thus have impelled the fast development of digital voltmeter, and constantly occur new type.

Traditional pointer scale voltage table needs to carry out reading by pointer and index dial, thus function singleness, and precision is low, easily causes parallax and visual fatigue, and also very inconvenient when reading, is easy to make mistakes.Can not meet the needs of present digital times, be doomed will replace by more accurate voltage measuring instrument.And SCM Based digital voltmeter, continuous print analog quantity can be converted to discrete digital form and be shown, thus its precision is high, antijamming capability is strong, extensibility is strong, integrated convenience, can also carry out real-time Communication for Power with PC, and digital voltmeter is the core of many digital instrumentations and basis.Take digital voltmeter as core, the digital instrumentation of various universal digital instrument, special digital instrument and various non electrical quantity can be extended to.Thus be widely used in the intelligent measuring fields such as the measurement of electronics and electrician, industrial automation instrument, Auto-Test System, demonstrate powerful vitality.Meanwhile, based on the various general and special digital instrument that digital voltmeter is extended to, also the measuring technique of electricity and non electrical quantity is risen to brand-new level.And wanting to realize gathering voltage by multichannel is also our real-life one large demand, and native system also solves emphatically such technical matters simultaneously.

At present, the internal core parts of digital voltmeter are A/D converters, and the precision of conversion affects the accuracy of digital voltmeter to a great extent, and thus, later digital voltmeter is just towards high precision and these two aspect development of low cost.

Utility model content

Technical problem to be solved in the utility model provides for the deficiency of background technology that a kind of precision is high, antijamming capability is strong, good, the integrated eight railway digital System of voltage acquisitions easily of extensibility.

The utility model is for solving the problems of the technologies described above by the following technical solutions:

A kind of eight railway digital System of voltage acquisitions, comprise micro controller module, voltage acquisition module, clock module, reseting module, display module, analog-to-digital conversion module and power module; Described voltage acquisition module connects micro controller module by analog-to-digital conversion module, described clock module, reseting module and display module are connected on the corresponding port of micro controller module, and described power module is micro controller module, voltage acquisition module, clock module, reseting module, display module, analog-to-digital conversion module provide required power supply.

As the further preferred version of a kind of eight railway digital System of voltage acquisitions of the utility model, described AD conversion unit comprises comparer, A/D converter, storer and control circuit.

As the further preferred version of a kind of eight railway digital System of voltage acquisitions of the utility model, described micro controller module adopts STC89C51 single-chip microcomputer.

As the further preferred version of a kind of eight railway digital System of voltage acquisitions of the utility model, described display module is light-emitting diode display.

As the further preferred version of a kind of eight railway digital System of voltage acquisitions of the utility model, described power module is chargeable storage.

The utility model adopts above technical scheme compared with prior art, has following technique effect:

1, the utility model precision is high, antijamming capability is strong: eight railway digital voltage tables mainly utilize A/D converter, processing procedure is first sampled to each road magnitude of voltage with A/D converter, obtain corresponding digital quantity, obtain corresponding analog voltage by the proportional computing of digital quantity and analog quantity again, then demonstrate surveyed magnitude of voltage by light-emitting diode display;

2, good, the integrated convenience of extensibility: eight railway digital System of voltage acquisitions can measure 8 road input voltage values within the scope of 0-5v, and can show in turn on 4 Digital sum pipes.Measurement ultimate resolution is 0.01v, and measuring error is about 0.02v.Therefore a lot of occasion is gone for.

Accompanying drawing explanation

Fig. 1 is structure principle chart of the present utility model;

Fig. 2 is the circuit diagram of the utility model analog-to-digital conversion module;

Fig. 3 is micro controller module of the present utility model and analog-to-digital conversion module connecting circuit figure;

Fig. 4 is the utility model display module circuit diagram.

Embodiment

Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail:

As shown in Figure 1, a kind of eight railway digital System of voltage acquisitions, comprise micro controller module, voltage acquisition module, clock module, reseting module, display module, analog-to-digital conversion module and power module; Described voltage acquisition module connects micro controller module by analog-to-digital conversion module, described clock module, reseting module and display module are connected on the corresponding port of micro controller module, and described power module is micro controller module, voltage acquisition module, clock module, reseting module, display module, analog-to-digital conversion module provide required power supply.

Wherein, described AD conversion unit comprises comparer, A/D converter, storer and control circuit, and described micro controller module adopts STC89C51 single-chip microcomputer, and described display module is light-emitting diode display, and described power module is chargeable storage.

This subsystem utilizes inner register to compare successively from a high position to status.When starting to change, register is every to reset, and first by extreme higher position 1, analog quantity is sent into A/D converter conversion, and transformation result and input analog amount compare, if transformation result is less than the analog quantity inputted, then 1 retains; If transformation result is larger than input analog amount, then 1 does not retain.Then second repeats said process successively until lowest order.

Because the modulus conversion chip ADC0809 of native system is made up of 8 path analoging switch, an address latch and code translator, an A/D converter and a ternary output latch.Multi-way switch can gating 8 analog channels, and allow 8 tunnel analog quantity timesharing inputs, shared A/D converter is changed.Eight railway digital voltage tables mainly utilize A/D converter, processing procedure is first sampled to each road magnitude of voltage with A/D converter, obtain corresponding digital quantity, obtain corresponding analog voltage by the proportional computing of digital quantity and analog quantity again, then demonstrate surveyed magnitude of voltage by light-emitting diode display.

The utility model precision is high, antijamming capability is strong: eight railway digital voltage tables mainly utilize A/D converter, processing procedure is first sampled to each road magnitude of voltage with A/D converter, obtain corresponding digital quantity, obtain corresponding analog voltage by the proportional computing of digital quantity and analog quantity again, then demonstrate surveyed magnitude of voltage by light-emitting diode display; Good, the integrated convenience of extensibility: eight railway digital System of voltage acquisitions can measure 8 road input voltage values within the scope of 0-5v, and can show in turn on 4 Digital sum pipes.Measurement ultimate resolution is 0.01v, and measuring error is about 0.02v.Therefore a lot of occasion is gone for.

As shown in Figures 2 and 3: STC89C51 single-chip microcomputer the digital quantity received by certain process, produce correct show code and send 4 LED display module to, the driving display circuit figure of group of four figures pipe, as shown in Figure 4: it also controls the light on and off of charactron by its four I/O mouths P3.0, P3.1, P3.2, P3.3 simultaneously.Wherein, single-chip microcomputer STC89C51 exports square wave by timer interruption from P2.4, receive the CLOCK of ADC0809, P2.6 sends out positive pulse and starts A/D modular converter, whether P2.5 detects A/D conversion and completes, after converting, P2.7 sets high from P1 mouth reading transformation result and gives LED successively by the eight road magnitudes of voltage recorded and shows.

Claims

1. eight railway digital System of voltage acquisitions, is characterized in that: comprise micro controller module, voltage acquisition module, clock module, reseting module, display module, analog-to-digital conversion module and power module; Described voltage acquisition module connects micro controller module by analog-to-digital conversion module, described clock module, reseting module and display module are connected on the corresponding port of micro controller module, and described power module is micro controller module, voltage acquisition module, clock module, reseting module, display module, analog-to-digital conversion module provide required power supply.

2. a kind of eight railway digital System of voltage acquisitions according to claim 1, is characterized in that: described AD conversion unit comprises comparer, A/D converter, storer and control circuit.

3. a kind of eight railway digital System of voltage acquisitions according to claim 1, is characterized in that: described micro controller module adopts STC89C51 single-chip microcomputer.

4. a kind of eight railway digital System of voltage acquisitions according to claim 1, is characterized in that: described display module is light-emitting diode display.

5. a kind of eight railway digital System of voltage acquisitions according to claim 1, is characterized in that: described power module is chargeable storage.