CN201497780U - Rapid cyclic-detection device for two-wire industrial instruments - Google Patents
Rapid cyclic-detection device for two-wire industrial instruments Download PDFInfo
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- CN201497780U CN201497780U CN2009200758983U CN200920075898U CN201497780U CN 201497780 U CN201497780 U CN 201497780U CN 2009200758983 U CN2009200758983 U CN 2009200758983U CN 200920075898 U CN200920075898 U CN 200920075898U CN 201497780 U CN201497780 U CN 201497780U
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Abstract
The utility model relates to a rapid cyclic-detection device for two-wire industrial instruments on the basis of the HART (highway addressable remote transducer) bus protocol digital communication technology and the multi-channel switching and high-precision data acquisition technology supported by dedicated detection software for host computers. The rapid cyclic-detection device capable of conducting the cyclic detection on a large scale for two-wire industrial instruments simplifies the production process, reduces the labor intensity and facilitates the troubleshooting and maintenance. The rapid cyclic-detection device comprises an intelligent instrument digital communication interface part capable of carrying out the digital communication with the instrument to be detected via a bus, two-way data transmission and tests and preliminary diagnosis on the intelligent functions of the intelligent instruments; since the device has flexible connection, the rapid cyclic-detection device can be allocated according to the quantity of the instruments to be detected; and the rapid cyclic-detection device helps make decisions on the improvement of process and quality, optimizes the production process of products and improves the production efficiency.
Description
Technical field
The utility model relates to a kind of instrument checkout equipment, particularly a kind of fast scanning detecting device of two-wire system industrial instrument.
Background technology
Industrial robot control system(RCS) instrument in the market, existing traditional analogue type instrument has digitized intelligence instrument again, and the analogue type instrument is still occupied certain market share based on 4～20mA two-wire system; Digitized intelligence instrument meets certain fieldbus specification usually, at present most widely used is the HART field bus protocol, because it has kept traditional 4～20mA simulating signal, therefore the digital communication mode that superposeed again simultaneously can realize alternative to analogue instrument under the condition that does not change the original system structure.As seen the intelligence or the non intelligent type instrument of main flow all have the simulation output function of 4～20mA at present, and its loop connects as shown in Figure 1.Thereby a kind of apparatus and method that can both detect two class instrument of consideration design are simplified the manufacturing process of instrument.
Instrument in process of production, various information and output signal thereof all need be preset and adjustment before dispatching from the factory, and simultaneously also need product performance index is tested, and guarantee the quality of products, and make product reach the standard of enterprise or country.Adjustment, check and relevant burn-in test are the important steps of instrument production run, have determined machine performance.Common inspection machine includes high accuracy number multimeter, sampling/pull-up resistor, signal source (pressure, temperature etc.).Some inspection machines once can only be operated an instrument like this, as shown in Figure 2.Be to realize mass production, the method that manufacturers extensively adopts at present is that many instrument are connected into independently loop, manually stirs the separate unit instrument that mechanical switch is chosen to be needed by traditional, and the measurement data that hand-kept is relevant is carried out manual detection.Though only a few has adopted the digital output function of surveying instrument to come record data, still switching to adopt, manually finishes in the passage of tested instrument, and labour intensity is big, and efficient is difficult to improve.Its system functional block diagram such as Fig. 3.
The production adjustment and the verifying attachment of HART protocol-intelligent instrument are also fairly simple, and comparing with traditional device only is to have increased simple RS-232 or RS-485 communication module to come detecting the collection of data; What the passage of bottom switched still employing is the manual switching of mechanical switch, is the mode of separate unit instrument verification, and efficient is lower, does not give full play of intelligent characteristic.
Traditional detection mode is that the tester manually selects test instrumentation, reads the instrument registration, and hand-kept and deal with data, its shortcoming are that error is big, the test duration is long, efficient is low, analyzing and processing data work is numerous and diverse; And Auto-Test System have precision height, data acquisition rapidly and efficiently, characteristics such as the analyzing and processing ability is strong, improved the precision and the efficient of test greatly, reduced tester's working strength.
Summary of the invention
The utility model is a deficiency of producing checkout equipment and method existence at present industrial robot control system(RCS) with instrument in batches, a kind of fast scanning detecting device of two-wire system industrial instrument has been proposed, can realize the function and the performance of instrument are done on-line testing in batches, the automatic switchover analog switch carries out the selection of sense channel, automatically test and report out (the electric current output inefficacy of the inefficacy in test products type and the unit module thereof, communication failure etc.), and performance index conformance with standard whether, the letter sorting product bug, resulting data can be preserved and be got off to analyze, provide decision-making for improving technology and improving the quality, optimize the production run of product, enhance productivity.
The technical solution of the utility model is: a kind of fast scanning detecting device of two-wire system industrial instrument; comprise several tested instrument; automatic testing equipment; host computer; current-limiting protection circuit in the automatic testing equipment; the load sampling resistor; be connected in series to several two-wire system industrial instrument loops that form on the positive and negative terminal of the 24V of power module in the automatic testing equipment with each tested instrument; automatic testing equipment also comprises analog switch gating control module; the numeral output module; the AD acquisition module; HART communication module and bus expansion interface; host computer by digital interface respectively with automatic testing equipment in digital output module; the AD acquisition module; the HART communication module connects; the host computer output signal by digital output module to analog switch gating control module; be used for a road of gating two-wire system industrial instrument loop; the host computer output signal is to the AD acquisition module; analog switch gating control module gating loop signal is sent acquired signal into host computer through the AD acquisition module; host computer is given an order to the HART communication module; the HART communication module is added to digital signal conversion back on the loop load sampling resistor by analog switch gating control module, the described power module of each modular power source termination.
Described HART communication interface comprises the digital interface module, the input filtration module, and the modulation module, the output Shaping module, voltage regulator module is realized the connection of HART Physical layer; The digital signal that digital interface sends, through the modulation module, the output Shaping module converts is that the Bell202 sinusoidal signal that meets the HART physical layer specification is added in 4～20mA analog loopback; The HART signal that returns from the loop is through the input filtration module, and the modulation module converts is a digital signal, is communicated by letter with host computer by the digital interface module.
Described AD acquisition module has comprised the power supply adjustment, signal Processing, AD conversion, photoelectricity is isolated, the usb communication interface, and analog switch gating control module comprises code translator, multiway analog switch etc., cooperate the address signal of digital output module output, realize the analog switch channel selecting.
Described automatic testing equipment can comprise several subsystems, and each subsystem comprises independently power module, load sampling resistor module, channel selecting module, connects by the bus expansion interface between subsystem, constitutes the host-guest architecture system.
The beneficial effects of the utility model are: the fast scanning detecting device of the utility model two-wire system industrial instrument, realization is to the continuous automatic inspection of many instrument, and the intelligentized characteristics of performance intelligence instrument are simplified production run, reduce labour intensity, make things convenient for the investigation and the maintenance of fault; Comprised intelligence instrument Interface for digital communication part in the system, can carry out digital communication, realized the data double-way transmission, the intelligent function of intelligence instrument has been tested and tentative diagnosis by bus and measured instrument; Can accurately measure the performance parameter of tested instrument, can judge the assay of instrument; The device connected mode is flexible, can according to how many configurations voluntarily of measuring instrument quantity; According to the difference of using, need not change hardware system, can change according to application based on the detection software of PC.Provide decision-making for improving technology and improving the quality, optimize the production run of product, enhance productivity.
Description of drawings
Fig. 1 is the loop connection layout of prior art two-wire system instrument;
Fig. 2 is a prior art separate unit Meter Test connection diagram;
Fig. 3 is traditional batch testing system schematic;
Fig. 4 is the fast scanning detecting device structural representation of the utility model two-wire system industrial instrument;
Fig. 5 is the hypotactic hardware system connection diagram of the fast scanning detecting device of the utility model two-wire system industrial instrument;
Fig. 6 is the touring fast physical construction synoptic diagram that detects pick-up unit embodiment of the utility model;
Fig. 7 is the main tank block diagram of an embodiment of the fast scanning detecting device of the utility model two-wire system industrial instrument;
Fig. 8 be the utility model two-wire system industrial instrument an embodiment of fast scanning detecting device from box-frame figure.
Embodiment
Fig. 1 is the loop connection layout of two-wire system industrial instrument, and 24V power supply 101, instrument 102 and pull-up resistor 103 are serially connected, and forms the electric current loop loop of 4～20mA;
Fig. 2 is a separate unit Meter Test connection diagram, power supply 201, tested instrument 202, pull-up resistor 203 forms series loop, the two ends that high precision multimeter 206 is parallel to pull-up resistor 203 are used for the ohmically voltage of sensing lead, pull-up resistor 203 is in this effect of playing sampling resistor, and the signal of gathering these resistance two ends can be realized the measurement to loop current; PC upper computer software 205 sends the HART order, by being loaded into the two ends of pull-up resistor 203 after 204 conversions of HART communication interface, the HART signal is added on the loop current, communicates with tested instrument 202.
Fig. 3 is the synoptic diagram of traditional batch testing system, tested instrument 301 is connected with power supply 307, load sampling resistor 309 in the traditional test device 302, a plurality of instrument circuits have been formed, the tester connects with measurement the signal at sampling resistor 309 two ends by manually stirring mechanical switch 308 with high precision multimeter 303 and HART communication module 304, the tester is recorded in it on recording chart 306 by reading high precision multimeter reading; HART communication is carried out between software on the PC 305 and tested instrument 301, and HART communication module 304 is as the physical connection between them, and the related data of communication also reads data recording on the upper computer software to recording chart 306 by the tester;
Fig. 4 is the system schematic of the automatic data-logger of the utility model, mainly is divided into 3 parts: extension instrument part 401, automatic testing equipment 402 and based on the host computer testing system software part 403 of PC.External tested instrument 404 is connected with automatic testing equipment 402 by cable; Automatic testing equipment 402 is made up of current-limiting protection circuit 405, load sampling resistor 406, power module 407, analog switch gating control module 408, digital output module 409, AD acquisition module 410, HART communication module 411, bus expansion interface 413 etc.Current-limiting protection circuit 405, load sampling resistor 406, be connected in series in the 24V output of power module 407 with tested instrument 404; form two-wire system industrial instrument loop; every instrument all connects into instrument circuit shown in Figure 1, and this loop provides the signal source that detects.The 12V of power module 407 exports to each module for power supply of inside of automatic testing equipment 402.The PC 403 that Auto-Test System software is installed is connected with digital output module, AD acquisition module, the HART communication module of automatic testing equipment 402 by digital interface.Automatic testing software sends the gating control signal and is transferred to multiway analog switch gating control module 408 by digital output module 409, road signal in a plurality of instrument circuits of gating, after automatic testing software sends acquisition, AD acquisition module 410 is responsible for one road signal of gating is carried out the AD collection, and be sent to automatic testing software by the interface of PC, by software data are handled.Automatic testing software can also send the HART order that meets the HART agreement, digital interface by PC sends HART communication module 411 to, this module converts digital signal to meet the HART standard FSK physical layer signal and is added on the loop load resistance 406, thereby communicates with the instrument of gating.Automatic testing equipment 402 can also be by 413 expansions of bus digital interface from case 412, for more instrument is tested.
The address signal of numeral output module output realizes channel selecting for analog switch gating control module.
Data acquisition module has comprised the power supply adjustment, signal Processing, and the AD conversion, photoelectricity is isolated, the usb communication interface.After host computer sent acquisition, data acquisition module carried out signal condition to the sampling resistor voltage in 4～20mA loop of selected passage, and the AD conversion reaches the digital communication with host computer, and collection result is passed to upper computer software;
The HART communication module comprises the digital interface module, modulation module, input filtration module, output Shaping module, voltage regulator module.This module realizes the connection of HART Physical layer, by this interface host computer and tested instrument circuit are connected, the digital signal that digital interface sends, through the modulation module, the output Shaping module converts is that the Bell202 sinusoidal signal that meets the HART physical layer specification is added in 4～20mA analog loopback; The HART signal that returns from the loop is through the input filtration module, and the modulation module converts is a digital signal, is communicated by letter with host computer by the digital interface module, thereby has realized the two-way communication of host computer and instrument.
Be installed in the auto Detection Software on the PC, comprised drive controlling, the realization of touring measuring ability and HART data link layer, application layer bottom hardware.
The utility model can be separated into a plurality of subsystems by bus digital interface 413, each subsystem comprises independently power module, load sampling resistor module, channel selecting module etc., connect by bus between subsystem, hypotactic as shown in Figure 5 hardware system connection diagram, constitute the hardware system of networking, realize detection more instrument.Main tank 501 passes through bus interface 502, bus 503 and is connected from case 504,507, expands many casings topological structure, to detect more instrument.From case 504,507 also can connect next stage from case 508,509, by that analogy.
Fig. 6, Fig. 7, Fig. 8 are the synoptic diagram of an embodiment of the present utility model.Total system adopts principal and subordinate's box topology structure, and each box house adopts modular design.
Fig. 6 is the physical construction synoptic diagram of an embodiment of the present utility model, illustrates a kind of mounting arrangements mode of whole device: casing 621 inside are equipped with data collecting plate card 619, signal sampling plate 617 and 623, gating control and communication mainboard 624 and power module 601 by crossbeam 609, column 616.Mechanical connection between them all adopts screw to be installed on the beam of casing.The USB7325BN data collecting card of safe industry control during data collecting plate card 619 adopts, it has comprised the function of data acquisition and numeral output simultaneously; Power module 601 is selected the switch power module T-50D of exportable 24V and 12V for use.The signal sampling plate is divided into two identical pcb boards, includes load sampling resistor and current-limiting protection circuit.Gating control and communication mainboard 624 have comprised HART communication interface and analog switch gate control circuit.
Being electrically connected between them is such: the output of power module 601 is connected to the connection terminal 603 of gating control and communication mainboard 624 by power lead, powers to system; The terminal 602,607 of gating control and communication mainboard 624 is connected with the power supply terminal twisted-pair feeder of sampling plate 617,623 respectively, powers to instrument circuit; The terminal 608 of gating control and communication mainboard 624 is connected with the power interface 613 of analog input card; The USB interface 612 of gating control and communication mainboard 624 is connected with the USB interface 614 usefulness USB connecting lines of analog input card; Another USB interface 611 of gating control and communication mainboard 624 is connected with PC by the USB connecting line; The interface 625 of control of the analog input mouth 620 of analog input card and gating and communication mainboard 624 is connected by winding displacement, and digital output 615 is connected with interface 626 by winding displacement; The interface 604,606 of gating control and communication mainboard 624 connects with the analog output signal interface of sampling plate 617,623 respectively; 610 is that the HART communication that is installed on gating control and the communication mainboard connects; 605 are and the bus interface that is connected from case; 618 is the interface that is connected with the outside multiplexing plate of casing, and external meters is connected into casing; 622 is the sampling resistor on the sampling plate.More than be the mounting arrangements of main tank, from the mounting arrangements and the main tank of case basic identical, reduced data collecting plate card 619 with and be connected with data line and be connected with power supply between gating control and the communication mainboard 624.
Fig. 7 is the system chart of an embodiment main tank of the utility model patent, comprises tested instrument part 701, signal sampling part 702, multi channel selecting control communications portion 703, part of data acquisition 704, system's supply module 705, and the PC 706 that automatic testing software is installed.Each several part adopts independently that PCB manufactures and designs, and is fixed on the crossbeam and column of casing, and the each several part power supply adopts twisted-pair feeder to connect, and the signal transmission adopts winding displacement to connect, data acquisition with HART communication adopt usb bus to be connected, form a complete system.PC 706 software designs have realized the gating control to multiplexer channel, the collection of simulated data, and HART protocol communication function.Tested instrument part 701 comprises many tested instrument 707, can be any common 4～20mA instrument or HART intelligence instrument, and with current-limiting protection circuit 708 in the signal sampling part 702, load sampling resistor 709 is composed in series instrument circuit together.Sampling resistor 709 adopts accurate wire-wound resistor.
In multi channel selecting control and the communications portion 703, HART communication module 719 adopts the isolated USB-HART communication of the TJ-3 type of Shanghai Industry Automation Meter Research Institute to connect; That USB HUB module 720 is selected for use is AU9254A21, and USB HUB inlet is connected with PC, utilizes two USB delivery outlets wherein to be connected with HART communication interface 719 with data collecting card 704 respectively, realizes HART communication and usb data collection; The numeral output of data collecting card 704 is control multi channel selecting control section after photoelectricity is isolated 715 isolation; Multiway analog switch 712 is selected the MAX306EWI of Maxim for use, and code translator 714 is selected CD4514B for use.Analog switch 712, code translator 714 and wire jumper 713 cooperate can select a road in maximum 256 tunnel.The 12V of power module 705 exports to each module for power supply in multi channel selecting control and the communications portion 703; after isolating, power isolation module 717 give data collecting plate card 704 power supplies; the order of the control module that powers on/off 718 control 12V and the outage of 24V power supply electrifying is with the protection inside chip.24V power supply through control is powered to instrument circuit.711,716 etc. then the signal of gathering is handled.Main tank also provides two bus expansion interface interfaces 721, and convenient expansion is from case.
Fig. 8 is the system chart of an embodiment of this patent from case, and is basic identical with the layout in the main tank, comprises tested instrument part 801, signal sampling part 802, multi channel selecting control communications portion 803, loop power supply module 814.Each functional module 12V power supply from case is by obtaining expansion interface 812 and being connected of main tank, this interface 812 also transmits the digital gating signal of data collecting plate card 704 after isolating simultaneously, similar in the connection of other parts and function and the main tank, also provide two bus interface 821 from case, the expansion next stage is from case.
Claims (4)
1. the fast scanning detecting device of a two-wire system industrial instrument; comprise several tested instrument; automatic testing equipment; host computer; current-limiting protection circuit in the automatic testing equipment; the load sampling resistor; be connected in series to several two-wire system industrial instrument loops that form on the positive and negative terminal of the 24V of power module in the automatic testing equipment with each tested instrument; it is characterized in that; automatic testing equipment also comprises analog switch gating control module; the numeral output module; the AD acquisition module; HART communication module and bus expansion interface; host computer by digital interface respectively with automatic testing equipment in digital output module; the AD acquisition module; the HART communication module connects; the host computer output signal by digital output module to analog switch gating control module; be used for a road of gating two-wire system industrial instrument loop; the host computer output signal is to the AD acquisition module; analog switch gating control module gating loop signal is sent acquired signal into host computer through the AD acquisition module; host computer is given an order to the HART communication module; the HART communication module is added to digital signal conversion back on the loop load sampling resistor by analog switch gating control module, the described power module of each modular power source termination.
2. the fast scanning detecting device of two-wire system industrial instrument according to claim 1 is characterized in that, described HART communication interface comprises the digital interface module, the input filtration module, modulation module, output Shaping module, voltage regulator module is realized the connection of HART Physical layer; The digital signal that digital interface sends, through the modulation module, the output Shaping module converts is that the Bell202 sinusoidal signal that meets the HART physical layer specification is added in 4～20mA analog loopback; The HART signal that returns from the loop is through the input filtration module, and the modulation module converts is a digital signal, is communicated by letter with host computer by the digital interface module.
3. the fast scanning detecting device of two-wire system industrial instrument according to claim 1, it is characterized in that, described AD acquisition module has comprised the power supply adjustment, signal Processing, the AD conversion, photoelectricity is isolated, the usb communication interface, analog switch gating control module comprises code translator, multiway analog switch etc., cooperates the address signal of digital output module output, realizes the analog switch channel selecting.
4. the fast scanning detecting device of two-wire system industrial instrument according to claim 1, it is characterized in that, described automatic testing equipment can comprise several subsystems, each subsystem comprises independently power module, load sampling resistor module, channel selecting module, connect by the bus expansion interface between subsystem, constitute the host-guest architecture system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200758983U CN201497780U (en) | 2009-08-06 | 2009-08-06 | Rapid cyclic-detection device for two-wire industrial instruments |
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| CN2009200758983U CN201497780U (en) | 2009-08-06 | 2009-08-06 | Rapid cyclic-detection device for two-wire industrial instruments |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102262176A (en) * | 2011-06-16 | 2011-11-30 | 深圳市科陆电子科技股份有限公司 | Method for measuring channel data of feeder terminal unit of power system |
| CN102608944A (en) * | 2012-03-07 | 2012-07-25 | 北京瀚景锦河科技有限公司 | Expansion device for semaphore acquisition port and expansion system |
| CN102654951A (en) * | 2012-04-12 | 2012-09-05 | 苏州市职业大学 | Automatic electronic experimental teaching system |
| CN102721878A (en) * | 2011-03-29 | 2012-10-10 | 佛山市质量计量监督检测中心 | Intelligentized automatic checkout device of quartz crystal oscillator instrument |
| CN103048603A (en) * | 2012-12-17 | 2013-04-17 | 华南理工大学 | Circuit system and testing method for testing service life of light emitting diodes in batches |
| CN106597917A (en) * | 2016-11-02 | 2017-04-26 | 武汉智明力强光电系统有限公司 | Intelligent industrial control instrument suitable for integrated signal management |
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2009
- 2009-08-06 CN CN2009200758983U patent/CN201497780U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721878A (en) * | 2011-03-29 | 2012-10-10 | 佛山市质量计量监督检测中心 | Intelligentized automatic checkout device of quartz crystal oscillator instrument |
| CN102262176A (en) * | 2011-06-16 | 2011-11-30 | 深圳市科陆电子科技股份有限公司 | Method for measuring channel data of feeder terminal unit of power system |
| CN102608944A (en) * | 2012-03-07 | 2012-07-25 | 北京瀚景锦河科技有限公司 | Expansion device for semaphore acquisition port and expansion system |
| CN102654951A (en) * | 2012-04-12 | 2012-09-05 | 苏州市职业大学 | Automatic electronic experimental teaching system |
| CN102654951B (en) * | 2012-04-12 | 2014-08-27 | 苏州市职业大学 | Automatic electronic experimental teaching system |
| CN103048603A (en) * | 2012-12-17 | 2013-04-17 | 华南理工大学 | Circuit system and testing method for testing service life of light emitting diodes in batches |
| CN103048603B (en) * | 2012-12-17 | 2015-12-02 | 华南理工大学 | The Circuits System of batch testing lifetime of LED and method of testing thereof |
| CN106597917A (en) * | 2016-11-02 | 2017-04-26 | 武汉智明力强光电系统有限公司 | Intelligent industrial control instrument suitable for integrated signal management |
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Granted publication date: 20100602 Termination date: 20180806 |