CN206906472U

CN206906472U - A kind of high accuracy number current measurement module

Info

Publication number: CN206906472U
Application number: CN201720546385.0U
Authority: CN
Inventors: 董静; 罗乘川; 郁兆年
Original assignee: Sichuan Tianli Technology Co Ltd
Current assignee: Sichuan Tianli Technology Co Ltd
Priority date: 2017-05-17
Filing date: 2017-05-17
Publication date: 2018-01-19
Anticipated expiration: 2027-05-17

Abstract

The utility model discloses a kind of high accuracy number current measurement module, the utility model belongs to field of current measurement, it is related to a kind of high accuracy number current measurement module, by power module, isolation module, data acquisition module, and the part of main control module four composition, wherein, the power module provides power supply for intelligence instrument, isolation module provides isolation features for the input per passage, main control module is communicated by 16 core winding displacements with data acquisition module, the utility model can realize single module measurement or multimode while measure, it is easy to set up high accuracy, data measurin system more than measurement point.

Description

A kind of high accuracy number current measurement module

Technical field

A kind of current measurement module is the utility model is related to, specially a kind of high accuracy number current measurement module, is belonged to Field of current measurement.

Background technology

In the real-time monitoring and process control of industry spot, extensively using such as Intelligent liquid level meter, pressure transmitter, stream The intelligence instruments such as transmitter, temperature transmitter, pressure controller, and most of intelligence instruments output antijamming capability is stronger 4~20mA current signals, the measurement of traditional ammeter can not be measured remotely, and data record is difficult, and response speed is slow, it is impossible to full Demand is monitored when full, for Engine Block Test experiment, measuring point is numerous, and data sampling rate and automation are required Degree is higher, now just needs the current measurement system that a kind of Measurement channel is more, sample rate is high, installation is simple, simple to operate.

At present, current measure device has occurred at present in the market, but is applied in the industry not high to required precision mostly Monitoring field, when being applied to the larger Engine Block Test field of measuring point, often occur that precision is relatively low, measuring point compared with Few, communication falls behind, it is difficult to meets research and production requirement, it is impossible to form the market competitiveness.

Utility model content

The purpose of this utility model is that the measurement stability of prior art is poor, precision is relatively low, is in order to solve The problems such as system integrated level is not high, communication falls behind and to provide a kind of precision higher, stability is good, the advanced high accuracy number electricity of communication Flow measurement module.

The utility model is achieved through the following technical solutions above-mentioned purpose：A kind of high accuracy number current measurement module, Including power module, isolation module, data acquisition module and main control module, the power module provides confession for intelligence instrument Electricity, isolation module provide isolation features for the input per passage, and the main control module passes through 16 core winding displacements and data acquisition module Communication.

Further, the main control module includes microcontroller, mixed-media network modules mixed-media, memory module and internal bus, the net Network module contains network adapter, realizes IEEE1588 ethernet communication protocols, and the microcontroller passes through internal bus and net Network module, memory module communication, the microcontroller is PIC32MX795L chips, and the mixed-media network modules mixed-media is DP83640 chips, The memory module is SST26VF016B chips.

Further, the data acquisition module includes programmable amplifier and analog-digital converter, the programmable amplifier For PGA281 chips, the analog-digital converter is ADS1247 chips, and the current signal of intelligence instrument output is first by programmable Amplifier is amplified or decayed, then is converted to data signal by analog-digital converter, and micro-control is transferred to finally by internal bus Device processed carries out data processing.

Further, the isolation module includes DC-DC insulating power supplies module and digital isolation module, the DC-DC isolation Power module can provide the 24V power supplies through isolation for intelligence instrument, the digital isolation module be signal input provide it is digital every From passage, the DC-DC insulating power supplies module and digital isolation module are ADUM5401 chips.

Preferably, in order to provide 16 road 24V power supplies to intelligence instrument, the power module is switched by 16 DC/DC Power supply forms and uses 24V direct current supplys.

Preferably, it is described in order to be suitable for setting up the current data acquisition system that measurement accuracy is high, measurement points are more DC-DC insulating power supply module isolation voltages are up to 1000V while the digital a width of 25Mbps of isolation module signal isolation band.

Preferably, in order that error is less than ± 0.05%, the power module 16 input channels and each input altogether Passage is using 24V power supplies and the 3 core connector bodies of current signal altogether.

The beneficial effects of the utility model are：The high accuracy number current measurement module is reasonable in design, and power module is by 16 Individual DC/DC Switching Power Supplies are formed and use 24V direct current supplys, and 16 road 24V power supplies, DC-DC isolation electricity can be provided for intelligence instrument Source module isolation voltage can reach every passage most up to 1000V while the digital a width of 25Mbps of isolation module signal isolation band High 60Hz synchronous acquisitions function, it is suitable for setting up the current data acquisition system that measurement accuracy is high, measurement points are more, data are adopted Collecting module, 16 input channels and each input channel use 24V power supplies and the 3 core connector bodies of current signal altogether altogether, 16 paths signal isolations input, and have high precision measurement ability, and full scale error is less than ± 0.05%.

Brief description of the drawings

Fig. 1 is the utility model principle schematic diagram；

Fig. 2 is the utility model structure terminals schematic diagram；

In figure：1st, power module, 2, isolation module, 2, DC-DC insulating power supply modules, 22, digital isolation module, 3, data Acquisition module, 31, programmable amplifier, 32, analog-digital converter, 4, main control module, 41, microcontroller, 42, mixed-media network modules mixed-media, 43rd, memory module and 44, internal bus.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

Refer to Fig. 1~2, a kind of high accuracy number current measurement module, including power module 1, isolation module 2, data Acquisition module 3 and main control module 4, the power module 1 provide power supply for intelligence instrument, and the power module 1 is by 16 DC/ DC Switching Power Supplies are formed and use 24V direct current supplys, and 16 road 24V power supplies can be provided for intelligence instrument, and isolation module 2 is per passage Input provides isolation features, the data acquisition module 3 altogether 16 input channels and each input channel using 24V power supplies with The 3 core connector bodies of current signal altogether, the input of 16 paths signal isolations have high precision measurement ability, and full scale misses Difference is less than ± 0.05%, and the main control module 4 is communicated by 16 core winding displacements with data acquisition module 3.

The main control module 4 includes microcontroller 41, mixed-media network modules mixed-media 42, memory module 43 and internal bus 44, described Mixed-media network modules mixed-media 42 contains network adapter, realizes IEEE1588 ethernet communication protocols, and the microcontroller 41 passes through internal total Line 44 communicates with mixed-media network modules mixed-media 42, memory module 43, and the microcontroller 41 is PIC32MX795L chips, the mixed-media network modules mixed-media 42 be DP83640 chips, and the memory module 43 is SST26VF016B chips.

The data acquisition module 3 includes programmable amplifier 31 and analog-digital converter 32, the programmable amplifier 31 For PGA281 chips, the analog-digital converter 32 is ADS1247 chips, and the current signal of intelligence instrument output is first by that can compile Journey amplifier 31 is amplified or decayed, then is converted to data signal by analog-digital converter 32, is transmitted finally by internal bus 4 Data processing is carried out to microcontroller 41.

The isolation module 2 includes DC-DC insulating power supplies module 21 and digital isolation module 22, the DC-DC isolation electricity Source module 21 can provide the 24V power supplies through isolation for intelligence instrument, and the digital isolation module 22 provides numeral for signal input Channel isolation, the DC-DC insulating power supplies module 21 and digital isolation module 22 are ADUM5401 chips, the DC-DC isolation The isolation voltage of power module 21 can reach every up to 1000V while the digital a width of 25Mbps of signal isolation band of isolation module 22 Passage highest 60Hz synchronous acquisition functions, it is suitable for setting up the current data acquisition system that measurement accuracy is high, measurement points are more.

It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation Involved claim.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.

Claims

A kind of 1. high accuracy number current measurement module, it is characterised in that：Including power module（1）, isolation module（2）, data Acquisition module（3）And main control module（4）；The power module（1）Power supply, isolation module are provided for intelligence instrument（2）To be every Passage input provides isolation features, the main control module（4）Pass through 16 core winding displacements and data acquisition module（3）Communication.
A kind of 2. high accuracy number current measurement module according to claim 1, it is characterised in that：The main control module （4）Including microcontroller（41）, mixed-media network modules mixed-media（42）, memory module（43）And internal bus（44）, the mixed-media network modules mixed-media（42） Containing network adapter, IEEE1588 ethernet communication protocols, the microcontroller are realized（41）Pass through internal bus（44）With Mixed-media network modules mixed-media（42）, memory module（43）Communication, the microcontroller（41）For PIC32MX795L chips, the mixed-media network modules mixed-media （42）For DP83640 chips, the memory module（43）For SST26VF016B chips.
A kind of 3. high accuracy number current measurement module according to claim 1, it is characterised in that：The data acquisition module Block（3）Include programmable amplifier（31）And analog-digital converter（32）, the programmable amplifier（31）For PGA281 chips, institute State analog-digital converter（32）For ADS1247 chips, the current signal of intelligence instrument output passes through programmable amplifier first（31） It is amplified or decays, then by analog-digital converter（32）Data signal is converted to, finally by internal bus（44）It is transferred to micro- Controller（41）Carry out data processing.
A kind of 4. high accuracy number current measurement module according to claim 1, it is characterised in that：The isolation module （2）Including DC-DC insulating power supply modules（21）With digital isolation module（22）, the DC-DC insulating power supplies module（21）Can be Intelligence instrument provides the 24V power supplies through isolation, the digital isolation module（22）Digital channel isolation, institute are provided for signal input State DC-DC insulating power supply modules（21）With digital isolation module（22）For ADUM5401 chips.
A kind of 5. high accuracy number current measurement module according to claim 1, it is characterised in that：The power module [1] it is made up of 16 DC/DC Switching Power Supplies and uses 24V direct current supplys.
A kind of 6. high accuracy number current measurement module according to claim 4, it is characterised in that：The DC-DC isolation Power module（21）Isolation voltage is up to 1000V while digital isolation module（22）The a width of 25Mbps of signal isolation band.
A kind of 7. high accuracy number current measurement module according to claim 4, it is characterised in that：The data acquisition module Block（3）16 input channels and each input channel use 24V power supplies and the 3 core connector bodies of current signal altogether altogether.