CN108121248A - A kind of general signal pickup assembly of multichannel based on bus - Google Patents
A kind of general signal pickup assembly of multichannel based on bus Download PDFInfo
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- CN108121248A CN108121248A CN201611084270.0A CN201611084270A CN108121248A CN 108121248 A CN108121248 A CN 108121248A CN 201611084270 A CN201611084270 A CN 201611084270A CN 108121248 A CN108121248 A CN 108121248A
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The invention belongs to industrial measurement and control technical fields, and in particular to a kind of general signal pickup assembly of multichannel based on bus.Including controller, 1394 data conversion modules, KVM, backboard unit, universal signal acquisition module, power isolation module, interface unit, sensor assembly；Controller is connected with 1394 data conversion modules transmits 1394 protocol data informations, controller is connected with KVM transmits video display information, backboard unit is connected with 1394 data conversion modules, backboard unit is connected with universal signal acquisition module by 1394 communication bus transmits control information and universal signal acquisition module output data information, universal signal acquisition module is connected with interface unit by signal wire and compensation lead of thermocouple transmits the data message of acquisition, power isolation module and interface unit are connected transmission sensor supply voltage signal by power cord, sensor assembly is connected with interface unit transmits the data message of acquisition.The present invention solve thes problems, such as that gatherer process is cumbersome, real-time is poor, autgmentability is poor.
Description
Technical field
The invention belongs to industrial measurement and control technical fields, and in particular to a kind of general signal acquisition dress of multichannel based on bus
It puts.
Background technology
In modern industrial production, control and field of scientific study, to various field datas for example temperature, pressure, flow and
The parameters such as vibration are acquired, transmit and handle to have great significance in process of production.It is more in production process in order to obtain
The dynamic data of seed ginseng quantity, this just needs the data acquisition that multichannel is carried out to controlled device and production process.At present, for
The multi-path data collecting device of vxi bus, PXI bus structures selects corresponding collector according to the difference of acquisition signal type
And interface mode, inconvenience is patched, gatherer process is cumbersome, real-time is poor；And by its single task tupe and operating rate etc.
It influences, to ensure sample frequency, sampling way can not be made very much, and autgmentability is bad, it is impossible to meet industry spot and multichannel is believed
The requirements such as the real-time sampling of number acquisition, channel interface is general, simple operation, antinoise signal interference.Therefore need for above-mentioned acquisition
Deficiency in system proposes a kind of better solution.
The content of the invention
It is insufficient existing for above-mentioned prior art it is an object of the invention to overcome, propose that a kind of multichannel based on bus is general
Signal pickup assembly.
The technical solution used in the present invention is：
The general signal pickup assembly of a kind of multichannel based on bus, including controller, 1394 data conversion modules, KVM, the back of the body
Plate unit, universal signal acquisition module, power isolation module, interface unit, sensor assembly；Controller and 1394 data conversions
Module, which is connected, transmits 1394 protocol data informations, and controller is connected with KVM transmits video display information, backboard unit and 1394 numbers
It is connected according to modular converter, backboard unit is connected with universal signal acquisition module by 1394 communication bus to be transmitted control information and lead to
With signal acquisition module output data information, universal signal acquisition module is led with interface unit by signal wire and thermocouple compensation
Line is connected the data message of transmission acquisition, and power isolation module and interface unit are electric by the power cord transmission sensor power supply that is connected
Signal is pressed, sensor assembly is connected with interface unit transmits the data message of acquisition.
The controller is connected with 1394 data conversion modules by pci interface transmits 1394 protocol data informations, control
Device processed is connected with KVM by VGA or DVI and USB data line transmits video display information；Controller will be covered logical more by bus
It is connected with signal acquisition module, the synchronous acquisition of realization multichannel universal signal, parameter setting, linear process, data are shown
And storage, and possess communication, equipment state abnormal conditions warning function.
1394 data conversion modules select PCI to turn IEEE 1394b capture cards, and the PCI for being inserted into controller host is inserted
In slot, be connected the data message for transmitting control information and acquisition by 1394 connecting lines with backboard unit；1394 data conversion moulds
Block exports after the data-signal received is converted according to 1394 agreements.
The KVM includes display and keyboard and mouse, and device provides input, display function in order to control, KVM by VGA or
Person's DVI interface connects controller.
The backboard unit includes emulation bus, digital communication/controlling bus, power bus and bus communication interface,
As connection controller and the bridge of universal signal acquisition module, measured signal is interconnected by emulation bus；Pass through number
Word communication/controlling bus controller sends order to universal signal acquisition module and receives measurement data；Universal signal gathers mould
The power supply of block is provided by power bus, and backboard unit is connected communication by bus communication Interface and Controler.
The universal signal acquisition module is divided into normal voltage acquisition module, normalized current acquisition module and thermocouple temperature
Spend acquisition module；Normal voltage acquisition module and normalized current acquisition module pass through letter per voltage and current acquisition channel all the way
Number line is connected on the same universal telecommunication interface of interface unit；Thermocouple Temperature Acquisition module, per acquisition channel all the way
It is connected respectively to by K, T, E compensating wire in 3 common temperature acquisition interfaces of K, T, E of interface unit；Controller is to thermoelectricity
Each passage of even temperature collecting module is configured, and by the control to phasing meter, is realized to multichannel T, K, E type thermocouple
Acquisition in real time.
Normal voltage acquisition module, normalized current acquisition module and the Thermocouple Temperature Acquisition module includes：Letter
Number conditioning module, A/D modular converters, electrical isolation module, FPGA data processing module, bus communication module and power module；
Signal-regulated kinase is amplified sensor assembly output signal, and A/D modular converters are connected transmission with electrical isolation module often
The transformed digital signals of road sign calibration signal A/D, the electrical isolation module each passage of transmission that is connected with FPGA data processing module are adopted
Collect the data message after electrical isolation, FPGA data processing module is connected with bus communication module after transmission control information and processing
Multichannel data information, bus communication module is connected with backboard unit internal digital communication/controlling bus, for leading to controller
Letter, power module provide power supply for coupled module；Pass through the multiple multi-channel serial A/D of FPGA data processing modules implement
Modular converter concurrent working simultaneously.
The interface unit and universal signal acquisition module are connected transmission sensing by signal wire and K, T, E compensating wire
The data message of device acquisition, interface unit and power isolation module are connected transmission sensor supply voltage signal by power cord.
The sensor assembly is made of polytype sensor, the sensor including 0~5V of outputting standard signal,
The sensor of 4~20mA of outputting standard signal and T, K, E type thermocouple sensor, it passes through sensor connecting line with interface unit
The standard connector of cable, which is connected, transmits the data message of acquisition.
The power isolation module includes linear direct current regulated power supply and isolation module, and linear direct current regulated power supply passes through
The power bus of backboard unit provides excitation power supply, isolation module and linear direct current regulated power supply phase for universal signal acquisition module
Even output multi-channel voltage signal is individually powered for each sensor, and power isolation module carries out the power supply between sensor
It is effectively isolated.
Having the beneficial effect that acquired by the present invention：
It is of the invention simple, be easily achieved, efficiently solve that previous gatherer process is cumbersome, real-time is poor, autgmentability is poor lacks
It falls into.The device can provide universal test passage to the various kinds of sensors and temperature sensor of outputting standard voltage, current signal,
It realizes synchronous acquisition and the storage of multichannel standard electric signal and multi way temperature channel data, and there is voltage/current Universal joint,
T, the features such as sensor hot plug is supported in K, E type thermocouple channel multiplexing, and passage is for being electrically isolated, reliability is high, substantially increases
The ability of signal acquiring system.The present invention is using skills such as 1394 protocol communications, FPGA controls, the general, isolated from power of channel interface
Art realizes the synchronous acquisition to multiple-channel output normal voltage, the various kinds of sensors of current signal and T, K, E type thermocouple, and
It is sent to by bus on controller, actual parameter value can obtain according to linearly or nonlinearly processing.The present invention passes through
FPGA handles data, facilitates extended simulation signal acquisition way, and takes full advantage of the parallel processing structure of FPGA, improves place
Manage the real-time of data.It is mutually isolated between each passage, and by taking corresponding interference protection measure, make it have good anti-
Jamming performance；Standard electric signal measurement passage can provide 24VDC driving voltages for sensor.
Description of the drawings
Fig. 1 is the general signal pickup assembly structure chart of multichannel based on bus；
Fig. 2 is universal signal acquisition module structure chart；
Fig. 3 is standard electric signal sampling channel air plug definition figure；
Fig. 4 is 3 line voltage sensor connection figures；
Fig. 5 is 2 line amperometric sensor connection figures.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, the general signal pickup assembly of the multichannel of the present invention based on bus includes：Controller, 1394 numbers
According to modular converter, KVM, backboard unit, universal signal acquisition module, power isolation module, interface unit, sensor assembly；Control
Device processed is connected with 1394 data conversion modules by pci interface transmits 1394 protocol data informations, and controller passes through VGA with KVM
Or DVI be connected with USB data line transmission video display information, backboard unit by 1394 built-in bus communication interfaces with
1394 data conversion modules are connected by 1394 connecting lines, and backboard unit passes through 1394 communication bus with universal signal acquisition module
The transmission control information that is connected and universal signal acquisition module output data information, universal signal acquisition module pass through with interface unit
Signal wire is connected with compensation lead of thermocouple transmits the data message of acquisition, and power isolation module passes through power cord with interface unit
Be connected transmission sensor supply voltage signal, and the connecting line standard connector of sensor assembly is connected with interface unit transmits acquisition
Data message.
The controller is connected with 1394 data conversion modules by pci interface transmits 1394 protocol data informations, with
KVM is connected by VGA or DVI with USB data line transmits video display information.Controller will cover universal signal more by bus
Acquisition module is connected, and the synchronous acquisition of realization multichannel universal signal, parameter setting, linear process, data show and store,
And possesses the abnormal conditions warning function such as communication, equipment state.
1394 data conversion modules select PCI to turn IEEE 1394b capture cards, and the PCI for being inserted into controller host is inserted
In slot, be connected the data message for transmitting control information and acquisition by 1394 connecting lines with backboard unit；1394 data conversion moulds
Block exports after the data-signal received is converted according to 1394 agreements.
The KVM includes display and keyboard and mouse.KVM integrates keyboard, mouse and display, and device carries in order to control
For input, display function, integrated level is high, and cabinet space is greatly saved, and controller is connected by VGA or DVI interface.
The backboard unit includes：Emulation bus, digital communication/controlling bus, power bus and bus communication interface,
It, can be mutual by measured signal by the emulation bus on backboard as connection controller and the bridge of universal signal acquisition module
It is connected；By the communication bus on backboard, controller can send order to universal signal acquisition module and receive measurement number
According to.The power supply of universal signal acquisition module is provided by backboard power bus, and backboard unit passes through 1394 built-in buses
Interface and Controler are connected communication.
Sensor sensing measured physical quantity simultaneously generates corresponding analog electrical signal, and electrical signal data is transferred to universal signal and adopts
Collect module, according to the difference of sensor type, universal signal acquisition module is divided into normal voltage acquisition module, normalized current acquisition
Module and Thermocouple Temperature Acquisition module.
The normal voltage acquisition module and normalized current acquisition module pass through per voltage and current acquisition channel all the way
Signal wire is connected on the same universal telecommunication interface of interface unit.
The Thermocouple Temperature Acquisition module is connected respectively to by K, T, E compensating wire per acquisition channel all the way and connect
In 3 common temperature acquisition interfaces of K, T, E of mouth unit.Controller can be to each passage of Thermocouple Temperature Acquisition module
It is configured, by the control to phasing meter, realizes the real-time acquisition to multichannel T, K, E type thermocouple.
As shown in Fig. 2, the universal signal acquisition module (normal voltage acquisition module, normalized current acquisition module and
Thermocouple Temperature Acquisition module) include：Signal-regulated kinase, A/D modular converters, electrical isolation module, FPGA data processing mould
Block, bus communication module and power module；Signal-regulated kinase is amplified sensor assembly output signal, A/D moduluss of conversion
Block is connected transmission with electrical isolation module per the transformed digital signals of road sign calibration signal A/D, electrical isolation module and FPGA numbers
Data message after each passage acquisition electrical isolation of transmission that is connected according to processing module, FPGA data processing module and bus communication mould
Block is connected transmission control information and treated multichannel data information, bus communication module and backboard unit internal communication bus phase
Even, for the communication with controller, power module provides power supply for coupled module.Device is by multiple multi-channel serial A/
D modular converters 10 are formed, and are realized the concurrent working simultaneously of multiple converters by FPGA data processing module 12, are being ensured data
Sampling rate is greatly improved while acquisition precision.Universal signal acquisition module, as control chip, is passed through using FPGA
Logic and timing control are realized in Verilog Programming with Pascal Language.If you need to increase acquisition channel, it is only necessary to which expanding data collecting unit is
It can.
The power isolation module includes：Linear direct current regulated power supply and isolation module, linear direct current regulated power supply lead to
It crosses the power bus of backboard unit and provides excitation power supply for universal signal acquisition module, ensure its normal work.Isolation module is adopted
2DS5, output voltage 24V are obtained with firm, it is connected output multi-channel voltage signal with linear direct current regulated power supply, is that each is passed
Sensor is individually powered, and power isolation module is effectively isolated the power supply between sensor, has broken away from the letter between each passage
Number interference.
The interface unit and universal signal acquisition module are connected transmission sensing by signal wire and K, T, E compensating wire
The data message of device acquisition is connected transmission sensor supply voltage signal with power isolation module by power cord.Voltage, electric current
Multiplexing electric interfaces are XS12K4P standard connectors, and the electric interfaces of the same passage of T, K, E type time-sharing multiplex are 2 needle thermocouples
Small plug.
The sensor assembly is made of polytype sensor, the sensor including 0~5V of outputting standard signal,
The sensor of 4~20mA of outputting standard signal and T, K, E type thermocouple sensor, it passes through sensor connecting line with interface unit
The standard connector of cable, which is connected, transmits the data message of acquisition.
As shown in figure 3, the air plug definition of standard electric signal sampling channel, electric interfaces XS12K4P, the 1st core：Voltage is believed
Number+, the 2nd core：+ 24VDC powers, the 3rd core：Current signal+, the 4th core：Power supply, signal ground.
As shown in figure 4,3 line voltage sensors adopting by the wiring diagram access general signal pickup assembly rear panel of multichannel
Collect on passage, show that respective channel is adopted after linearly or nonlinearly being handled voltage signal by data acquisition software on the controller
The parameter value collected.
As shown in figure 5,2 line amperometric sensors adopting by the wiring diagram access general signal pickup assembly rear panel of multichannel
Collect on passage, on the controller by data acquisition software to showing that respective channel is adopted after current signal linear or Nonlinear Processing
The parameter value collected.
It is different according to the type of thermocouple sensor, the thermocouple of respective type is inserted into corresponding thermocouple acquisition channel
On, different thermocouple junction colors is different, and K-type thermocouple junction is yellow, and T thermocouple junctions are blueness, and E type thermoelectricity couples
Head is purple.Synchronization, same passage can only gather the thermocouple of a type (K/T/E), will on data acquisition software
It can show the temperature value that respective channel collects.
Claims (10)
1. a kind of general signal pickup assembly of multichannel based on bus, it is characterised in that：Including controller, 1394 data conversion moulds
Block, KVM, backboard unit, universal signal acquisition module, power isolation module, interface unit, sensor assembly；Controller with
1394 data conversion modules, which are connected, transmits 1394 protocol data informations, and controller is connected with KVM transmits video display information, backboard
Unit is connected with 1394 data conversion modules, and backboard unit and universal signal acquisition module are connected transmission by 1394 communication bus
Control information and universal signal acquisition module output data information, universal signal acquisition module and interface unit by signal wire and
Compensation lead of thermocouple is connected the data message of transmission acquisition, and power isolation module and interface unit are connected transmission by power cord
Sensor supply voltage signal, sensor assembly is connected with interface unit transmits the data message of acquisition.
2. the general signal pickup assembly of the multichannel according to claim 1 based on bus, it is characterised in that：The control
Device and 1394 data conversion modules are connected 1394 protocol data informations of transmission by pci interface, controller and KVM by VGA or
Person DVI is connected with USB data line transmits video display information；Controller will cover universal signal acquisition module more by bus to carry out
Series connection realizes that the synchronous acquisition of multichannel universal signal, parameter setting, linear process, data show and store, and possess communication,
Equipment state abnormal conditions warning function.
3. the general signal pickup assembly of the multichannel according to claim 1 based on bus, it is characterised in that：Described 1394
Data conversion module selects PCI to turn IEEE 1394b capture cards, is inserted into the PCI slot of controller host, passes through 1394 connections
Line be connected with backboard unit transmission control information and gather data message；1394 data conversion modules believe the data received
It is exported after number being converted according to 1394 agreements.
4. the general signal pickup assembly of the multichannel according to claim 1 based on bus, it is characterised in that：The KVM
Including display and keyboard and mouse, device offer input, display function, KVM pass through VGA or DVI interface connection control in order to control
Device.
5. the general signal pickup assembly of the multichannel according to claim 1 based on bus, it is characterised in that：The backboard
Unit includes emulation bus, digital communication/controlling bus, power bus and bus communication interface, as connection controller and leads to
With the bridge of signal acquisition module, measured signal is interconnected by emulation bus；It is controlled by digital communication/controlling bus
Device sends order to universal signal acquisition module and receives measurement data；The power supply of universal signal acquisition module passes through power bus
It is provided, backboard unit is connected communication by bus communication Interface and Controler.
6. the general signal pickup assembly of the multichannel according to claim 1 based on bus, it is characterised in that：Described is general
Signal acquisition module is divided into normal voltage acquisition module, normalized current acquisition module and Thermocouple Temperature Acquisition module；Standard electric
Acquisition module and normalized current acquisition module are pressed, interface unit is connected to by signal wire per voltage and current acquisition channel all the way
Same universal telecommunication interface on；Thermocouple Temperature Acquisition module passes through K, T, E compensating wire point per acquisition channel all the way
It is not connected in 3 common temperature acquisition interfaces of K, T, E of interface unit；Controller is every to Thermocouple Temperature Acquisition module
A passage is configured, and by the control to phasing meter, realizes the real-time acquisition to multichannel T, K, E type thermocouple.
7. the general signal pickup assembly of the multichannel according to claim 6 based on bus, it is characterised in that：The standard
Voltage acquisition module, normalized current acquisition module and Thermocouple Temperature Acquisition module include：Signal-regulated kinase, A/D conversions
Module, electrical isolation module, FPGA data processing module, bus communication module and power module；Signal-regulated kinase is to sensing
Device module output signal is amplified, after A/D modular converters are connected transmission with electrical isolation module per road sign calibration signal A/D conversions
Digital signal, electrical isolation module is connected the data letter after transmission each passage acquisition electrical isolation with FPGA data processing module
Breath, FPGA data processing module is connected with bus communication module transmits control information and treated multichannel data information, bus
Communication module is connected with backboard unit internal digital communication/controlling bus, and for communicating with controller, power module is and its phase
Module even provides power supply；Pass through the multiple multi-channel serial A/D modular converters of FPGA data processing modules implement while parallel work
Make.
8. the general signal pickup assembly of the multichannel according to claim 1 based on bus, it is characterised in that：The interface
Unit and universal signal acquisition module are connected the data message that transmission sensor gathers by signal wire and K, T, E compensating wire,
Interface unit and power isolation module are connected transmission sensor supply voltage signal by power cord.
9. the general signal pickup assembly of the multichannel according to claim 1 based on bus, it is characterised in that：The sensing
Device module is made of polytype sensor, and the sensor including 0~5V of outputting standard signal, outputting standard signal 4~
The sensor of 20mA and T, K, E type thermocouple sensor, the standard connector that it passes through sensor connection cables with interface unit
Be connected the data message that transmission gathers.
10. the general signal pickup assembly of the multichannel according to claim 1 based on bus, it is characterised in that：The electricity
Source isolation module includes linear direct current regulated power supply and isolation module, and linear direct current regulated power supply is total by the power supply of backboard unit
Line provides excitation power supply for universal signal acquisition module, and isolation module is connected output multi-channel voltage letter with linear direct current regulated power supply
Number, it individually powers for each sensor, power isolation module is effectively isolated the power supply between sensor.
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| CN108981788B (en) * | 2018-08-03 | 2021-02-02 | 珠海瑞景电子科技有限公司 | Modular sensor circuit |
| CN109100415A (en) * | 2018-09-03 | 2018-12-28 | 中国石油大学(北京) | The non-destructive testing device of pipe insulating layer can be penetrated |
| CN109856576A (en) * | 2018-12-09 | 2019-06-07 | 北京航天计量测试技术研究所 | A kind of electrical parameter calibrating installation Integrated Self method |
| CN109856471A (en) * | 2018-12-09 | 2019-06-07 | 北京航天计量测试技术研究所 | A kind of multi-parameter Interface Matching and verifying system |
| CN111107161A (en) * | 2019-12-31 | 2020-05-05 | 新奥数能科技有限公司 | Data acquisition method and device |
| CN112382072A (en) * | 2020-10-29 | 2021-02-19 | 鞍钢集团自动化有限公司 | Non-standardized signal acquisition method based on 5G module |
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