CN202771188U

CN202771188U - Universal signal conditioning system

Info

Publication number: CN202771188U
Application number: CN 201220349782
Authority: CN
Inventors: 谭峰; 陈越强
Original assignee: SHANGHAI CONCORD TECHNOLOGY Corp
Current assignee: SHANGHAI CONCORD TECHNOLOGY Corp
Priority date: 2012-07-18
Filing date: 2012-07-18
Publication date: 2013-03-06
Anticipated expiration: 2022-07-18

Abstract

The utility model discloses a universal signal conditioning system, which comprises a communication connection module, a switch control module, an input module, a gain control module, a bias compensation module, a programmable filter, a programmable voltage source, a programmable current source, an output module and a calibrated signal source. The universal signal conditioning system disclosed by the utility model is capable of conditioning signals of a plurality of physical quantity data, transmitting the conditioned signals to a data acquisition board card for high-speed data reading, and also completing acquisition and selection of the physical quantity of a channel at the front end of a module through software.

Description

A kind of universal signal conditioning system

Technical field

The utility model belongs to physical quantity signal thermometrically equipment, especially relates to a kind of universal signal conditioning system.

Background technology

Along with the development of domestic industry technical merit, increasing for the demand of the Dynamic Data Acquiring of various physical quantity signals.Measuring technology develops into now, can say that the acquisition and processing to various physical signallings has quite perfect technology, but in user's use, also exists some can improved place.

At present, data acquisition equipment is when carrying out Functional Design, often for specific input signal, such as voltage, electric current, IEPE type acceleration transducer etc.When this situation caused carrying out at the same time the data acquisition of multiple physical quantity signal, the user need to select for specific signal the type of integrated circuit board, had increased the cost of test.And, when carrying out actual test job, certain physical quantity signal must be connected to the test port of corresponding integrated circuit board, because the number of channels of corresponding integrated circuit board is fixed, cause system relatively fixing to the test channel number of certain physical quantity, be unsuitable for more and more flexibly test request.

The utility model content

Technical problem to be solved in the utility model provides a kind of universal signal conditioning system, can carry out signal condition and the high-speed data acquisition of multiple physical quantity data.

In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:

A kind of universal signal conditioning system, comprise the communication link block, switch control module, load module, gain control module, the bias compensation module, programmable filter, programmable voltage source, programmable current source, output module and calibration signal source, wherein, the output terminal of switch control module connects the input end of gain control module by load module, the output terminal of gain control module connects the input end of programmable filter, another termination output module of programmable filter, the input end of switch control module connects respectively programmable voltage source, the output terminal of programmable current source and calibration signal source, the output terminal of communication link block is the connecting valve control module respectively, gain control module, the bias compensation module, programmable filter, programmable voltage source, programmable current source and output module.

Adopt universal signal conditioning system of the present utility model, have following advantage:

1, can carry out the signal condition of multiple physical quantity data;

2, conditioned signal being transferred to data collecting plate card reads for high-speed data;

3, also can finish through software the physical quantity collection selection of module front passage.

Description of drawings

Be elaborated below in conjunction with the drawings and specific embodiments the utility model:

Fig. 1 is structured flowchart of the present utility model.

Fig. 2 is the utility model use principle figure.

Embodiment

As shown in Figure 1, universal signal conditioning system 12 of the present utility model comprises communication link block 1, switch control module 2, load module 3, gain control module 4, bias compensation module 5, programmable filter 6, programmable voltage source 7, programmable current source 8, output module 9 and high-precision calibration signal source 10, wherein, the output terminal of switch control module 2 connects the input end of gain control module 4 by load module 3, the output terminal of gain control module 4 connects the input end of programmable filter 6, programmable filter 6 another termination output modules 9, the input end of switch control module 2 connects respectively programmable voltage source 7, the output terminal of programmable current source 8 and calibration signal source 10, the output terminal of communication link block 1 is connecting valve control module 2 respectively, gain control module 4, bias compensation module 5, programmable filter 6, programmable voltage source 7, programmable current source 8 and output module 9.

Wherein the effect of modules is as follows:

Communication link block 1 is used for the PXI system carries out synchro control and order control to the data conditioning module communication;

Switch control module 2 is used for switching between various physical quantity signal input circuits, is subjected to software and PXI data acquisition card control;

Load module 3 is used for the conditioning of the physical quantity signal of various inputs, makes various physical quantity signals be converted into voltage;

Gain control module 4 is used for the voltage signal after the conditioning is amplified conditioning;

Bias compensation module 5 is used for the bias compensation of the voltage signal after the conditioning and processes;

Programmable filter 6 is used for the filter function of the rear voltage signal of conditioning;

Programmable voltage source 7 is used for some signal in the situation that input process needs to encourage, and driving voltage is provided;

Programmable current source 8 is used for some signal in the situation that input process needs to encourage, and exciting current is provided;

Output module 9 is used in the time need to need to carrying out the output of pumping signal to outside testpieces, and signal output is provided;

High-precision calibration signal source 10 is used for each channel signal is carried out self-calibration function.

Adopt connection that the utility model carries out thermometrically as shown in Figure 2: the model that controller 16 adopts is NI PXIe-8108, the signal that high-speed synchronous capture card 15 adopts is NI PXIe-6358, system bus 17 adopts the PXIe bus, and communication bus 14 adopts spi bus.Wherein, the analog input 11 of sensor is connected to the input end of universal signal conditioning system 12, simulating signal is inputted in it, simulation output 13 after 12 conditionings of universal signal conditioning system is connected to the input end of high-speed synchronous voltage acquisition card 15, the control inputs of universal signal conditioning system is connected by communication bus 14 with the digital I/O of high-speed synchronous capture card 15, and the data after the collection and controller 16 are realized mutual by system bus 17.

Before the test, according to measuring mission requirements, can be configured each channel measurement type and parameter by the software configuration interface.After initialization was finished, this passage namely was configured to corresponding measurement pattern, then started acquisition software, can begin data acquisition, storage and analysis etc.Because every passage is all integrated multifunctional signal conditioning functions, so this universal signal conditioning system 12 can support the mixing synchronous acquisition of signal with different type, compares with the simple function of traditional test instrument, can greatly reduce testing cost.

In sum, adopt universal signal conditioning system 12 of the present utility model, the user only need be with required various physical quantity signal access module front ends, in software, select the physical quantity test-types of each port, adopt general data collecting plate card to be connected with module and can carry out many physical quantitys data acquisition.Its value is that the user can carry out arbitrarily the acquisition configuration of many physical quantitys under total acquisition channel quantity, has greatly saved user's measurement cost, and has greatly improved the dirigibility that test is used.

But, those of ordinary skill in the art will be appreciated that, above embodiment illustrates the utility model, and be not to be used as restriction of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.

Claims

1. universal signal conditioning system, it is characterized in that: comprise communication link block, switch control module, load module, gain control module, bias compensation module, programmable filter, programmable voltage source, programmable current source, output module and calibration signal source, wherein

The output terminal of switch control module connects the input end of gain control module by load module, the output terminal of gain control module connects the input end of programmable filter, another termination output module of programmable filter, the input end of switch control module connects respectively the output terminal of programmable voltage source, programmable current source and calibration signal source, and the output terminal of communication link block is connecting valve control module, gain control module, bias compensation module, programmable filter, programmable voltage source, programmable current source and output module respectively.