CN109884362A - Big data architectural framework intelligence multimeter - Google Patents

Abstract

Big data architectural framework intelligence multimeter, belongs to intelligence manufacture field, is New Generation of Intelligent multimeter.The multimeter is equipped with resistance key Ω, DC voltage key DV, alternating voltage key AV, DC current key DV, seven alternating current key AA, multifunction key M and reset key R keys, instead of more than 20 a gears of digital multimeter；One-touch gear shift, one-stop measurement；Two input jacks of VA Ω and COM are only set, test pencil never pulls and pushes；Ohms range has measurement resistance, three Xiang Gongneng of diode and buzzer on-off；For instrument with big data architectural framework, data integration storage processing is core technology, breaches traditional batch structure, converged network, using DC-AC two-use 5V power supply.The present invention breaches the technology and structural pattern of existing digital instrument, and core technology supports creation New Generation of Intelligent instrument series of products.

Description

Big data architectural framework intelligence multimeter

Technical field

Belong to intelligence manufacture field, is the intelligent multimeter for overturning the prior art comprehensively.

Background technique

Digital multimeter is originated in the industrial automation epoch, is widely used in the every field of human society production and living. It is universal to have reached ubiquitous degree since appearing on the market 40 years.Into after the new century, basic framework and core technology The requirement of significant departure information age, so that data acquisition becomes the significant bottleneck of big data, Internet of Things and artificial intelligence technology One of.The backwardness of digital multimeter technology, is mainly manifested in following aspect:

Structure is complicated by one, and use is cumbersome.

The measuring gear up to more than 20 of the digital multimeter resistance of hand shift, voltage, electric current, using cutting one by one manually The method shift changed；Resistance grade measures the low-voltage in circuit, low current does not also support diode without low-resistance buzzer vocal function Measurement, it is necessary to which in addition dedicated shelves are set.The digital multimeter of upgrade version fluid drive sets shelves more than 10, in milivoltmeter and voltage meter Resistance is different, considers that millivolt and volt, microampere, milliampere and ampere must all be set shelves respectively, to ensure instrument from instrument safety Safety；The measurement of alternating current-direct current signal will also carry out auxiliary handover operation by key.Buty shifting in use, not only operation is numb It is tired, and often in the case where instrument mainboard is intact, instrument is scrapped in advance because of Gear-shift switch abrasion.

The current measurement drawback of digital multimeter is more prominent.Since shift switch can only absolutely not be allowed by voltage By electric current, the prior art sets up milliampere and ampere grade separately two dedicated jacks of electric current, realization and voltage resistance bar none Measurement separates, to ensure instrument safety.In measurement process, test pencil frequently pulls and pushes between voltage and current jack, not only Trouble, also usually loosens binding post, gently then influences measurement accuracy, the heavy then repairing that must uncap.It is more headachy to be, Milliampere grade and ampere grade are respectively adopted the fuse of two kinds of specifications, it is careless slightly will blowout；Due to Super-Current Measurement With more risk, high-end multimeter is protected using very worthy fastp-acting fuse, however when measuring high current, Technical staff or on tenterhooks, or even have to temporarily use low-grade multimeter instead.Though research and development of the countries in the world through many decades, The measurement protection technique of multimeter high current, does not obtain the breakthrough of matter.

Two, software and core technology fall behind.

Digital multimeter come out at the beginning of, digital instrument with meet it is " foolproof " display, without being programmed for target, in industry Automation age is conducive to popularize really.But to the information age, digital instrument is in addition to number display is for naked eyes reading Except, technology has no to be associated with digitlization, without data integration storage processing mechanism and technology, can not converged network, Bad old practices die hard for these critical defects.Worldwide, digital instrument realizes intelligentized all effort, is all accused with failure Eventually.The fluid drive digital multimeter of upgrade version only calls display with chip microcontroller digital instrument, still with amount item by item Journey signal is referring to progress gear shift, and waiting for a long time, measuring speed is slow, becomes its critical defect.There are no how, electric current survey The self shifter of amount, if being still referring to progress gear shift with range signal, waiting for a long time, range signal not yet occurs, and protects Dangerous silk is blown already.Have to be divided into two dedicated jacks, self shifter here it is digital multimeter current measurement over 40 years Innovate the very crux having difficulty in taking a step.Protection to high current shelves, other than using fastp-acting fuse, industry suffers from not having good plan.

In three, worldwides, the technical research of intelligent multimeter is not in progress

Before and after 2000, the concept and target of intelligence instrument are proposed in the world.Each scientific and technological power collection top-quality technologies and specially Family, is tackled key problems for a long time, fails to develop the intelligence instrument for meeting information-based requirement so far, only in digital instrument On the basis of, manual shift part is realized into self shifter.The main reason for research and development are obstructed, is not solve data integration The means of technology and real-time intelligent dynamic construction big data architectural framework measurement model, structure and the still comprehensive edge of core technology Attack digital instrument.Until today, the research and development of intelligence instrument produce no breakthroughs in the world.

Applicant collects many decades electronics technology experience, has declared wide area observing and controlling intelligence universal meter with unique intention, has obtained It must authorize.It is invented as early period, mainly solves the problems, such as the wide area observing and controlling of multimeter, started the dual-purpose elder generation of multimeter observing and controlling River.Multimeter product is a huge series family, and numerous specification styles all must be set up surveying in resistance, voltage, electric current On " avometer " basis of amount；As the wide area observing and controlling intelligence universal meter of invention early period, " avometer " main body is not comprehensive Realize big data architectural framework, core technology fails to overturn the prior art comprehensively, only in the following intelligent multimeter series of products A specification kind, there is no universal directive significance to intelligent multimeter new range is constructed.

Multimeter is intelligent, worldwide, has become people and thirsts for solving always but never succeed Technical problem.The present invention makes above-mentioned all world-famous puzzles be readily solved, and provides one for following intelligent multimeter series of products The big data system basic framework of a standard.

Summary of the invention

Big data architectural framework intelligence multimeter, denomination of invention itself have annotated its technical characteristics.Multimeter Professional book and numerous technical staff, sanctified by usage that voltage, current connector are referred to as jack, the present invention continues to use slotting This common name of hole is conducive to patent and promotes and realize industrialization.The design is with " big data architectural framework, at data integration storage Reason and visualization " and " break through traditional batch structure, towards wide area observing and controlling, realize bottom Internet of Things to internet seamless merge with It is integrated " it is core technology.

The present invention is realized according to following scheme: big data architectural framework intelligence multimeter, comprising: uses AC220V/ The external charger of DC8.6V and the interior power of alterating and direct current for setting 8.6V/5V lithium battery composition；For controlling gating analog switch Input terminal obtains each shelves resistance, voltage or the single-chip microcontroller of current signal, this single-chip microcontroller also passes through 4094,2803 chips and four Relay for resistance, voltage and current stepping is connected；And with clock chip, Temperature Humidity Sensor, USB communication interface and nothing Line communication module is connected；AC signal is first through AC/DC converter, and into A/D converter, direct current signal is directly entered A/D conversion Analog quantity is converted into digital quantity and send single-chip microcontroller by device, A/D converter.

By 200 Ω, 2K, 20K, 200K, 2M, 20M grades of digital multimeter resistance grade and buzzer quick shelves, diode Shelves are measured, three is merged into and uses Ω grades；By 200mV, 2V, 20V, 200V, 1000V shelves of digital multimeter AC/DC voltage, close It and is DV grades/AV grades；By 200uA, 2mA of digital multimeter AC/DC electric current, 20 mA, 200 mA, 20A grades, DA is merged into Shelves/AA grades, all gear shift operations click mark one key of key in place；Multiplexing key M is clicked in timesharing can make data keep (HOLD), or Shelves are tested into hFE.By the COM of digital multimeter, V Ω, tetra- input jack of mA, 20A, merging, which becomes COM, VA Ω two, is inputted Jack.

Referring to schematic diagram: J1 is that resistance grade and volt step voltage shelves share relay, and J2 is millivolt shelves relay.Voltage gear One end input resistance R1 10M of volt shelves is connected with the normally opened contact of J1, the normally opened touching of millivolt shelves 100K input resistance R2 and J2 Point is connected, and R1, R2 other end connect the output end 3 of U1, and the input port of U1 successively connects the dynamic of divider resistance R3-R6, J1 and J2 Contact connects the port VA Ω；After milliampere shelves relay J3 is in parallel with the movable contact of ampere shelves relay J4, with the port VA Ω phase Even, the signal end of 1 Ω sampling resistor R16 are connected with VA Ω jack through J3, are also connected with U8 input terminal, U8 and U7 and 4 ratio Resistance constitutes programmable amplifier, and U8 output end leads to A/D converter, the signal end of 0.01 Ω sampling resistor R17 of ampere grade through U7 Normally opened contact through J4 is connected with VA Ω jack, also leads to A/D converter through R7 and U1；Resistance measuring circuit is divided into high low-resistance two Road, the one end measuring resistance R9-R14 are mutually linked as common point, and VA Ω jack, low-resistance shelves measuring resistance are connected with relay J1 through Rt R9 the and R10 other end, is connected with U4 respectively, is also connected through U2 with 3.6V regulated power supply, the standard of 40K -40M high resistant shelves Resistance R11-R14, the other end connect the port U3 respectively, and the normal voltage of the public termination 2500mV of U3, the one of R15 terminates U3, another End connects VA Ω jack through J1 and leads to IN mouthfuls of A/D converter through U6.Three realize one-touch change with ohms range and voltage, electric current, resistance All standing is kept off, the one-stop measuring technique of two jacks thoroughly breaches traditional batch structure comprehensively, overturns prior art pattern, It is unprecedented generation information technology intelligence multimeter.It is that structure is simple, easy to use, powerful in big data system Intelligent terminal；Its core technology and structure type will lead the new trend of international intelligent multimeter.

In voltage gear, normally opened contact of the VA Ω jack through relay J1 is connected with the one end 10M resistance R1, and the R1 other end connects The program-controlled gear divider of U1 and R3-R6 composition is connect, and leads to IN mouthfuls of A/D converter, instrument is set as 4V grades of standby shapes State.The process of voltage measurement is as shown in Figure 3: as input signal Vx >=0.400V, single-chip microcontroller according to from small to large to data at Managing as a result, choosing intrinsic standoff ratio in 1/10,1/100,1/1000,1/10000, foundation corresponds to volt grade shelves, measures aobvious Show；As Vx < 0.400V, J2 is connected in instruction, turns off J1, so that 100K resistance R2 is accessed measuring circuit, it is real that instrument establishes millivolt shelves Testing amount is shown, when being shown as 0, returns to 4V grades of standby modes.

In current gear, the port VA Ω is through J3 normally opened contact and 1 Ω sampling resistor signal end R16 and U8/OP07 input terminal phase Even, single-chip microcontroller and U7, U8 form program-controlled voltage amplifying circuit, and amplification factor 1000 is arranged, and 400uA grades are standby mode.Electric current The process of measurement is as shown in Figure 4: as input signal Ix < 400.0uA, real-time display is put big as Ix >=400.0 uA Multiple is 1, constructs 400 milliamperes of shelves and measures again, as Ix 400.0 mA of <, single-chip microcontroller according to data processing as a result, changing Become amplification factor, builds corresponding milliampere shelves measurement；As Ix >=400.0 mA, J3 is turned off, connects J4, buzzer sounding, building peace Train shelves measurement display.

In resistance grade, the port VA Ω is connected through J1 normally-closed contact with the common point of measuring resistance R9-R14, the one end R15 warp The power supply of U3 and 2500mV is connected, and the IN mouth of another termination A/D converter, setting A/D converter is 4V grades, i.e. resistance measurement waits for Machine shelves show HL；Resistance measurement process is shown in Fig. 5: testing resistance Rx and R15 divides 2500mV, partial pressure value Vx, single-chip microcontroller According to the judgement processing to Vx, instruction building rule of three measures shelves.Judgement and measurement are successively carried out from low-resistance to great-great-grandfather, if Vx= 0, a step jumps ohms range, measurement display data, buzzer sounding when resistance value is less than 50 Ω.To realize resistance measurement one Whole gears are covered in key shift.

At 400 Ω grades of resistance, port of the 200 Ω measuring resistances through U2 4066 is connected with 3.6V regulated power supply, 3.6V electricity Pressure can directly light assorted LED, triggering PN junction diode conducting through 200 Ω measuring resistance current limlitings, by test pencil.To realize Resistance measurement, buzzer fast measure, diode measurement third gear is unified.

During voltage measurement, millivolt level voltage gear relay J2 is not by DV key, AV key control.J2 is by single-chip microcontroller pair Measurement data Vx is handled, as Vx < 0.400V, real-time perfoming shift switching.The never direct face of millivolt level voltage gear To external high-tension measurement environment, so that it is guaranteed that instrument safety.

During current measurement, ampere grade current gear relay J4 is not by DA key, AA key control.By single-chip microcontroller logarithm It is judged that processing, when Ix >=400mA, instruction is attracted J4, turns off J2, constructs ampere grade current gear in real time.Ampere grade current gear is forever Far from directly facing external measurement environment, so that it is guaranteed that instrument safety.

Compared with prior art, the present invention has following beneficial outcomes

1. pioneering simple structure digital multimeter is since the invention, the whole world follows the input of 4 jacks, and structure is complicated, behaviour Make cumbersome.Tradition is overturned in two jacks input of the invention.

2. the Improved digital multimeter of most simple operating system all intelligent multimeters of calling oneself in the world, in face of multiple Gear and alternating current-direct current shelves, campaigning after often first preselecting just can enter target shift.Each one key of shelves of the present invention is no dispute in place Most simple operating system.

3. multi gear system merges into the multimeter of one grade of prior art processed, voltage gear is divided into millivolt and volt different stalls, Current gear is more subdivided into microampere, milliampere, ampere multi gear.All voltage and current measurements of the present invention realize one gear all standing, measurement One-stop completion.

4. the multimeter of the Multifunctional resistance shelves prior art uses resistance measurement, buzzer quick on-off bar none Measurement and diode measurement set shelves respectively, not only structurally and operationally complicated, but also because frequent switching accelerates shift switch abrasion, Short slab as multimeter service life.The unprecedented realization third gear unification of the present invention.

5. intelligent protection technology current measurement is the weakest link of digital multimeter, industry be eager to improve but suffer from not having it is good Plan.Intelligent gearshift guard technology of the invention makes current measurement realize one grade of change from microampere to amperometric measurement, is to surmount people The subversiveness of cognition is innovated.

6. the Portable universal Intelligent terminal for Internet of things present invention thoroughly breaches tradition with big data architectural framework comprehensively Layered structure；Use data integration storage processing for core technology, it can be achieved that wide area observing and controlling；Wired and wireless two kinds can be passed through Mode, converged network, realizes the target that bottom Internet of Things is merged and integrated to internet seamless whenever and wherever possible.

7, as realized, industrialization drives seriation to the great comprehensive significance present invention, and it is difficult will to crack the data acquisition world Topic promotes internet, big data, artificial intelligence and manufacturing depth integration, middle and high end is led to consume, and pushes quality and effect Rate is changed.

8, the structure for creating one-touch two jack of the epoch-making intelligence instrument new range present invention, be it is apodeictic most Simple structure type can be supported to create completely new intelligence instrument series, promote generation information technology using the present invention as core Development.

9, China seizes intelligence instrument standard formulation power China and has formulated 36 UHV transmission international standards；China The day of the intelligence instrument series appearance for cracking world-famous puzzle of invention, is that China wins intelligence instrument international standard formulation right When.

10, Created in China intelligence instrument family chip distributes all over the world various collection of the import including digital instrument chip At circuit, China spends more than 10,000 hundred million yuans every year." the intelligent general-purpose An Fubiao " that applicant has authorized, a table generation For one series of existing digital panel meter, 20 specifications and converged network；" intelligent multi-source An Fubiao " table appoints more The digital panel meter for type specification of anticipating realizes big data architectural framework, multi-source heterogeneous data integration, greatly simplifies upgrading intelligence The power distribution cabinet and instrument box of power grid, intelligence manufacture, optimize high-end electromechanical product design；" wide area observing and controlling intelligence universal meter " measurement Control dual-purpose converged network；Based on the present invention and the three intelligence instrument patents of invention authorized, China is developed Intelligence instrument family chip, does not need 7 nanometers of top technology, but the combination of numerous unique intellectual technologies, the realization of target It is within sight.

Detailed description of the invention

Fig. 1 is outline drawing of the invention

Fig. 2 is the principle of the present invention figure.

Fig. 3 is voltage gear measurement flow chart of the present invention.

Fig. 4 is current gear measurement flow chart of the present invention.

Fig. 5 is resistance grade measurement flow chart of the present invention.

Specific embodiment

Instrument structure shows 4 data among LCD display, and right shows electricity, Non-Electricity Measurement unit, such as V, MA, DEG C etc., center below data, display is presently in the mark such as gear, such as DV, AV, Ω.If multifunction key M and reset key R, DC voltage key DV, alternating voltage key AA, DC current key DA, alternating current key AA, resistance key Ω.Instrument only sets COM, VA Two input jacks of Ω, test pencil never pull and push.Display screen lower left sets power switch K, and right sets hFE measurement socket.In instrument Square left side sets external 220V/8.6V lithium battery charger socket can both fill the lithium battery of gauge internal after plug insertion, It can also be to instrument power supply；It is detached from after charger, instrument, by 7805 chips, supplies instrument using 5V system by 8.6V lithium battery Electricity.Instrument upper right face sets USB communication interface, can communicate with computer and networks, uninterruptedly can measure and support within 24 hours Establish database.External control jack is for implementing Electromechanical Control.The full-featured requirement for meeting big data architectural framework.

Gear setting

One grade of DV shelves cover 400mV, 4V, 40V, 400V, 1000V gear

One grade of AV shelves cover 400mV, 4V, 40V, 400V, 750V grades

One grade of DA shelves cover 400uA, 4mA, 40mA, 400 mA, 10A grades

One grade of AA shelves cover 400uA, 4mA, 40mA, 400 mA, 10A grades

One grade of Ω shelves cover 400 Ω, 4K, 40K, 400K, 4M, 40M grades

The original in style interface circuit of A/D converter interface circuit is comprehensive important means for realizing subversiveness innovation.The X of U4 Mouth is used as output end, connects the REF anode of A/D converter, the output end x connection of input port 0X and U6, to obtain standard Voltage, input port 1x/2x/3X are successively connect with 200 Ω measuring resistance of ohms range, 4K grades of 2K measuring resistances, and through 4066 It is connect with 3.6V voltage, port 3x is connect through U2/4066 with 2500mV voltage;The common end Y of U4 connects A/D as output end The common end of the REF negative terminal of converter, the logical ground 0 Y of input port, the port 1Y/2Y/3Y and measuring resistance connects, and single-chip microcontroller is logical Control U4 is crossed, can synchronize makes U4 be followed successively by voltage gear, ohms range, 4K grades and 4 kinds of modes of high resistant shelves；The X mouth of U6 is used as output end Connect A/D converter the port IN, 4 input port 0X/1X/2X/3X, be separately connected mV grades, V grades, AC grades of DC voltage and The input port of resistance grade, the common end Y of U6 is as output end, and by the REF anode of U4 connection A/D converter, 4 of U6 are defeated Inbound port 0Y/1Y/2Y/3Y, is separately connected normal voltage 200mv and 2000mV, and single-chip microcontroller, can synchronous change A/ by control U6 The full scale value of D converter simultaneously connects corresponding input gear.

Voltage measurement technologies click DC key, and instrument enters DC voltage shelves standby mode, and display shows 0.000V, under Side prompts for DV grades, and relay J1 is attracted at this time, and the voltage inputted from Ω mouthfuls of VA is added in U1 through J1 normally opened contact, 10M resistance R1 Common end, it is 1/10 that R2 and R1 intrinsic standoff ratio, which is arranged, in program；It is 200mV that U6 is set REF by single-chip microcontroller, and A/D converter is constituted Full scale 400.0mV voltmeter；Since intrinsic standoff ratio is 1/10, so instrument is in DV4V grades of standby modes, 0.000V is shown.Input Analog signal Vx transmitted through U6 to A/D converter, after A/D conversion, such as Vx < 0.400V, MCU Instruction changes setting: closing Disconnected J1 connects J2, and 100K resistance R2 seals in measuring circuit, turns off U1 bleeder circuit, Vx is converted into millivolt level data and is shown；If Data Vx≤4.000V, does not show, single-chip microcontroller is according to logarithm it is judged that processing constructs corresponding shelves as a result, instructing and changing intrinsic standoff ratio Position, display precision data measures again, if Vx is 0 value, measurement terminates, and returns to the standby shelves of 4V.

Alternating voltage shelves click AV key, and the coupled capacitor C of the analog signal of the common end U1 is added in AC/DC chip, through U6's The port AC is input to A/D converter.Remaining step is identical as DV measurement.

Current measurement techniques click DA key, and milliampere grade current gear relay J3 is attracted, and R16 signal end connects OP07 input End, OP07 and R20, R21, R23, R24 and CD4052 form 1000 times of voltage amplifiers, and instrument enters direct current 400uA current gear Standby mode shows 000.0uA.When measurement, input current Ix is from Ω mouthfuls of VA through fuse, J3 normally opened contact, 1 Ω resistance R16 Enter ground.The sampled voltage of R16 signal end is transmitted to OP07 input terminal, then through being input to A/D converter through U7, U6.After conversion, such as Data Ix < 400.0uA, directly displays；Such as data Ix≤400.0uA, then it is 1 that OP07 is set amplification factor by single-chip microcontroller, 400.0mA grades, A/D is converted again, such as data Ix < 400.0mA, single-chip microcontroller according to logarithm it is judged that processing as a result, passing through U7 Change the amplification factor of OP07, construct respective notch, show precision data, repeated measurement, if Ix is 0 value, measurement terminates, and returns The standby shelves of 400.0uA；If when Ix≤400.0mA, MCU Instruction turns off J3, J4 is connected, builds the measurement display of ampere grade shelves, instead Repetition measurement amount returns to the standby shelves of 400.0uA if Ix is that 0 value measurement terminates.

In particular, it should be pointed out that the digital multimeter of the prior art, it is necessary to be shifted gears, can only be adopted for foundation with range signal With dedicated low speed A/D conversion chip.The present invention is converted using data integration storage processing technique as core using high speed A/D Chip.During current gear realizes that microampere shelves jump to ampere shelves, it can be neglected the time required to the judgement of data sampling conversion twice Slightly disregard, crash change of speed speed is only related with relay reaction speed.Relay reaction speed is 10 milliseconds, so microampere shelves are jumped It goes to ampere shelves to complete at 10 milliseconds or so, will not have any impact to instrument.For the sake of being perfectly safe, 1 Ω sampling resistor R16, using line around 5W precision resistance.In fact, destructive testing proves, even if changing R16 into 1/4W common metal film resistance, Ampere grade high current is repeated and jumps test, metalfilmresistor and instrument are safe and sound, guard technology of intelligently filing, from basic On solve the problems, such as multimeter measurement high current security protection.

Resistive measurement clicks Ω key, and 100K measuring resistance R15,2500mV reference power supply is connected through U3 in one end, another Termination is A/D converter IN mouthfuls logical, and display shows HL, prompts for Ω grades, instrument enters resistance grade standby mode.Testing resistance Rx It after access, inputs, 2500mV is divided with R15, partial pressure value Vx through relay J1 stationary contact, judge processing knot according to Vx Fruit, measurement display of filing in real time；Judge, file and measuring technique, is overturned comprehensively from most high resistant 20M grades one steps of waiting range signal The prior art moved down is walked, is initiated successively from low-resistance to high resistant determining method, if Vx is 0, a step jumps ohms range, measurement display number According to 50 Ω of Rx ﹤, buzzer sounding.

In ohms range, 3.6V voltage can directly light all-colour LED by test pencil, can also touch through 200 Ω measuring resistance current limlitings Send out PN junction diode conducting.It is fast measured to realize resistance measurement, buzzer, the unification of diode measurement third gear.

The original and different resistance grade standby mode of the optimization design of resistance grade, measuring resistance use 100K, can after Rx access Quickly to generate partial pressure value, to realize that moment judgement jumps；Quickly judge gear with data processing method, file and measure using than Example method, raises the length of rule of three low-resistance shelves guard technology maturation, keeps away it according to slow short of range signal shift, optimization design is perfect in fact Crash change of speed is showed, multi gear merges into the one grade and Ω gear unification of shelves three.

Software programming, by the setting code and data of all gears of avometer, is compiled on the efficient circuit base of uniqueness It writes and is stored within program, the analog quantity that sampling is obtained carries out integrated storage processing after AD conversion, to data, judges mesh Gear is marked, corresponding code and data is called, completes disposable real-time and precise and file, this technology overcomes the whole world and continued to use 40 " the technology prejudice " of the range signalling shift in year；Resistance grade and voltage gear share a relay JI, and line inlet connects respectively In stationary contact and movable contact, current gear relay J2 and J1 are interlocked with program；The relay J2 and J4 of expanded range, are not responding to people Work operation, can only be attracted or be turned off in real time by program, this technology broken the whole world over 40 years 4 jack of multimeter input it is intrinsic Pattern achieves " unexpected technical effect "；Using original in style programming method word by word and sentence by sentence, control is accurate to half word Section, each step of instrument operation are to carry out in strict accordance with design, and can control in real time.The present invention is created by conventional device The combination for the property made, solve instrument it is intelligent this " it is difficult that people thirst for solving but fail always the technology to succeed always Topic ".

The architecture intelligence multimeter product of intelligent multimeter is a huge series family, numerous specification moneys Formula all must be set up on " avometer " of resistance, voltage, current measurement is basic.Intelligent general-purpose watch series are with the present invention Only integrated circuit related with same and programmable sensor need to be added in architecture, and any type of electricity, non-can be constituted with single-chip microcontroller Electrical measurement instrument, and external control is realized by relay J5 in machine.The present invention as demonstration, multi-functional set electronic clock, temperature, Humidity third gear.

The information age significant intelligence instrument present invention is equipped with USB and wireless communication module, can whenever and wherever possible with network Or computer communication, it is qualified information age intelligence multimeter.Industrialization need to only rewrite program, can increase hommization Function.Such as voltage gear, again tap on voltage key, instrument can be made to enter millivolt shelves, for the continuous measurement of millivolt level, reduce after The on-off number of electric appliance；Current gear again taps on electric current key, and instrument can be made to enter the continuous measurement that ampere shelves carry out high current, subtracted The on-off number of few relay.The key is again tapped on, former standby shelves is returned, other keys is clicked, into other shelves.

Usage brief introduction booting, LCD show full 0 no marks, are model to be selected.It clicks M key and enters multi-functional shelves, the present invention Multi-functional 1-3 grades, be followed successively by electronic clock, temperature, humidity shelves；Remaining key is clicked, into gear corresponding with key name；In electricity During measurement, M key is HOLD key, and click can be such that data keep；In the standby mode of avometer, M key is clicked, into hEF Shelves can measure triode；4K grades or ohms range, Rx are jumped to according to data moment when measuring resistance value Rx < 4K in resistance grade When 50 Ω of <, buzzer sounding；Directly light assorted LED；Triggering and conducting diode.

Applicant's long campaigns electronic technology and instrument service work, the present invention are that the fact of foundation model machine is declared.Institute Functional to examine through field survey, effect meets expection.

Claims (8)

1. big data architectural framework intelligence multimeter, comprising: using AC220V/DC8.6V external charger and interior set 8.6V/ The power of alterating and direct current that 5V lithium battery is constituted；Each shelves resistance, voltage or electricity are obtained for controlling the input terminal of gating analog switch The single-chip microcontroller of signal is flowed, this single-chip microcontroller also passes through 4094,2803 chips and four and is served only for the relay of resistance, voltage and current stepping Device is connected；And be connected with clock chip, Temperature Humidity Sensor, USB communication interface and wireless communication module, AC signal first passes through AC/DC converter enters back into A/D converter, and direct current signal is directly entered A/D converter, and analog quantity is converted by A/D converter Digital quantity send single-chip microcontroller, it is characterised in that: by 200 Ω, 2K, 20K, 200K, 2M, 20M grades of digital multimeter resistance grade and bee Ring device quick shelves, diode measurement shelves merge into three and use Ω grades；By 200mV, 2V of digital multimeter AC/DC voltage, 20V, 200V, 1000V grades, merge into DV grades/AV grades；By 200uA, 2mA of digital multimeter AC/DC electric current, 20 mA, 200 MA, 20A grades, DA grades/AA grades are merged into, all gear shift operations click mark one key of key in place；Multiplexing key M is clicked in timesharing to be made Data are kept, or are entered hFE and tested shelves, by the COM of digital multimeter, V Ω, tetra- input jack of mA, 20A, merge become COM, One end input resistance R1 10M of two input jack of VA Ω, voltage gear volt grade is connected with the normally opened contact of J1, and millivolt shelves 100K is defeated Enter resistance R2 to be connected with the normally opened contact of J2, R1, R2 other end connect the output end 3 of U1, and the input port of U1 successively connects partial pressure The movable contact of resistance R3-R6, J1 and J2 connect the port VA Ω；The movable contact of milliampere shelves relay J3 and ampere shelves relay J4 is simultaneously After connection, be connected with the port VA Ω, and the signal end of 1 Ω sampling resistor R16 is connected through J3 with VA Ω jack, also with U8 input terminal phase Even, U8 constitutes programmable amplifier with U7 and 4 proportion resistor, and U8 output end leads to A/D converter, 0.01 Ω of ampere grade through U7 Normally opened contact of the signal end of sampling resistor R17 through J4 is connected with VA Ω jack, also leads to A/D converter through R7 and U1；Resistance Measuring circuit is divided into high low-resistance two-way, and the one end measuring resistance R9-R14 is mutually linked as common point, connects VA with relay J1 through Rt Ω jack, low-resistance shelves measuring resistance R9 and the R10 other end, is connected with U4 respectively, is also connected through U2 with 3.6V regulated power supply, Measuring resistance R11-R14 of 40K-40M high resistant shelves, the other end connect the port U3, the standard electric of the public termination 2500mV of U3 respectively Pressure, a termination U3 of R15, the other end connect VA Ω jack through J1 and lead to IN mouthfuls of A/D converter through U6,

2. big data architectural framework intelligence multimeter according to claim 1, it is characterised in that: voltage gear be set as 4V grades to Machine state, as input signal Vx >=0.400V, single-chip microcontroller according to data processing as a result, 1/10,1/100,1/1000, Intrinsic standoff ratio is chosen in 1/10000, constructs corresponding volt shelves measurement display from small to large；As Vx < 0.400V, J2, shutdown are connected J1, building millivolt shelves measurement display, Vx return to standby shelves when being 0.

3. big data architectural framework intelligence multimeter according to claim 1, it is characterised in that: U8 times magnification is arranged in current gear Number is standby for 1000,400uA grades, when input signal Ix < 400.0uA, real-time display；When Ix >=400.0 uA, change amplification factor It is 1, builds 400 milliamperes of shelves and measure again, as Ix 400.0 mA of <, change amplification factor, builds corresponding milliampere shelves measurement display；When When Ix >=400.0 mA, J3 is turned off, connects J4, buzzer sounding, building ampere shelves measurement display.

4. big data architectural framework intelligence multimeter according to claim 1, it is characterised in that: measuring resistance R15 connects Voltage is added in the A/D that full scale is 4V by 2500mV power supply

IN mouthfuls of converter, IN mouthfuls of voltages are 2500mV, the standby display HL of resistance grade；After Rx access, 2500mV is by Rx and R15 points Pressure be Vx, single-chip microcontroller according to Vx judgement processing as a result, construct rule of three resistance grade measure display.

5. big data architectural framework intelligence multimeter according to claim 4, it is characterised in that: data judge from low-resistance to height Ancestral successively carries out, and when Vx is 0, a step jumps ohms range.

6. big data architectural framework intelligence intelligence multimeter according to claim 1, it is characterised in that: 3.6V voltage is through 200 Ω Measuring resistance current limliting can directly light assorted LED by test pencil or diac is connected, and realize that three use Ω grades.

7. big data architectural framework intelligence multimeter according to claim 2, it is characterised in that: millivolt level relay J2 not by By key control, but judged by single-chip microcontroller according to data, as Vx < 0.400V, carries out relay switching.

8. big data architectural framework intelligence multimeter according to claim 3, it is characterised in that: ampere grade relay J4 not by By key control, but judged by single-chip microcontroller according to data, when Ix >=400mA, carries out relay switching.