CN200989915Y - Digital universal meter with programmable multichannel inspection measurement function - Google Patents
Digital universal meter with programmable multichannel inspection measurement function Download PDFInfo
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- CN200989915Y CN200989915Y CN 200620023078 CN200620023078U CN200989915Y CN 200989915 Y CN200989915 Y CN 200989915Y CN 200620023078 CN200620023078 CN 200620023078 CN 200620023078 U CN200620023078 U CN 200620023078U CN 200989915 Y CN200989915 Y CN 200989915Y
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Abstract
The utility model discloses a digital multimeter with a programmable multichannel polling measuring function, including a programmable multichannel polling function module, a function switch module, an imitation front end signal processing module, an A/D switch function module, a computer system, a microprocessor and a communication connector module, the utility model can pollingly measure arbitrary programs aiming at all the measured objects of the measuring channel. The utility model adopts a programmable matrix switch, thereby measuring arbitrary programs of multiway measured objects, realizing the intelligent control measurement. The utility model solves the problems of that the existing multimeter has a single channel, a dumb use, and can not intelligently collect data; users have troublesome use and can not be suitable for the large scale product measurement when the users measure a plurality of functions of a certain measuring signal. Thus, the utility model makes the digital multimeter more intelligent, provides the mutimeter with stronger functions and better practicability in the actual production measuring field.
Description
Technical field
The utility model relates to a kind of digital multimeter, particularly relates to a plurality of measuring-signals are carried out the digital multimeter that difference in functionality is measured.
Background technology
Digital multimeter mainly comprises several sections both at home and abroad at present: function handover module, AFE (analog front end) signal Processing, A/D conversion functional module, microprocessor, communication interface modules, demonstration and keyboard etc.Aspect the measurement passage, generally adopt the design of single channel or two path manual mechanical type selection measurement passages, this dual mode uses simple relatively.But there are many shortcomings:
1) user can only carry out single functional measurement to certain measuring-signal, if the user will carry out a plurality of functional measurements to it, must manually select other measurement function, so just brings very big inconvenience to the user;
2) user will carry out single functional measurement to a plurality of measuring-signals, must go these measured signals of contact one by one with the test pencil of multimeter, to obtain needed measurement data, so also can bring very big inconvenience to the user;
3) user should select different measured signals as carrying out the measurement of a plurality of difference in functionalitys to a plurality of measuring-signals, adjusts the measurement function of multimeter again, and the user operates and just seems inconvenient more.
Above-mentioned three kinds of situations, if it is few or measure under the number of times condition of limited to occur in measured signal, the user also may accept reluctantly; If these three kinds of situations occur in mass product production test link, then to carry out the control measurement of a plurality of measuring-signals to each product on the production line, at this moment, the user again can not accept existing multimeter passage single, used inflexible shortcoming, because they can't satisfy the requirement of actual production test.
Patent of invention 00114164.3, a kind of auto-range digital multimeter and auto-range method thereof are disclosed, by analog-to-digital converter circuit, position control switching levels circuit, latch circuit, numerical value comparator circuit, trigger memory circuit, simulation is switched and no-load voltage ratio circuit, amplifier circuit, AC/DC change-over circuit and LCD are electrically connected jointly and constitute.Its auto-range method comprises that the data of A/D converter are input to latch circuit, delivers to the numerical value comparator circuit again, trigger and remember its state, and control simulation commutation circuit, signal amplifies, input A/D converter, steps such as demonstration.
It has selected 4 for use, and " 1/2 A/D converter makes that the figure place showing of multimeter of auto-range is 41/2 bit digital, and promptly display digit is " 19999; Utilize that 41/2 A/D converter output numeral latchs, numeric ratio, trigger memory, control voltage, resistance, current analog commutation circuit just select different no-load voltage ratios to reach the purpose that realizes the amount of changing limit; Maximum current 2＜the mA of A/D converter, amplifier circuit, digital circuit is the cmos circuit device, so its working current＜2mA, all working current＜4mA of multimeter; Multimeter auto-range method simple possible does not need special debugging aborning, is convenient to produce in batches; Low in energy consumption, not only power saving but also improved the stability of mimic channel.
The multimeter of above-mentioned technology is a kind of digital multimeter with automatic range handoff functionality only, the automatic range handoff functionality that it is focused on.
The utility model content
Single in order to solve present multimeter passage, use dumb, can not carry out intelligent data acquisition, the user is when carrying out the measurement of a plurality of functions to certain measuring-signal, user's troublesome poeration, can not adapt to the problem that typical products in mass production detects needs, the utility model makes digital multimeter in the hommization more of actual production field tests, intelligent, user-friendly, adapt to typical products in mass production test needs, satisfy the requirement of user for the hyperchannel multifunction programable, make the function of digital multimeter more powerful, perfect, for this reason, the utility model adopts a kind of digital multimeter front end to increase hyperchannel able to programme and patrols and examines measurement function Module Design scheme, and a kind of digital multimeter that hyperchannel able to programme is patrolled and examined measurement function that has is provided.
The utlity model has hyperchannel able to programme and patrol and examine the digital multimeter of measurement function, comprising: hyperchannel able to programme is patrolled and examined measurement function module, function handover module, AFE (analog front end) signal processing module, A/D conversion functional module, computer system, microprocessor, communication interface modules;
The input end of function handover module and output terminal patrol and examine the output terminal of measurement function module with hyperchannel able to programme respectively and the input end of AFE (analog front end) signal processing module is connected in series, be used for the signal of each passage input is carried out the function switching, and export to the AFE (analog front end) signal processing module and carry out signal condition;
The output terminal of AFE (analog front end) signal processing module is connected with the input end of A/D conversion functional module, and the conditioned signal that the AFE (analog front end) signal processing module is produced becomes digital signal by the A/D conversion functional module with analog signal conversion;
Communication interface modules is connected with microprocessor with computer system respectively, and the user informs microprocessor via communication interface modules with the controlling schemes that hyperchannel patrols brake by computer system;
Microprocessor is patrolled and examined measurement function module, function handover module and A/D conversion functional module with hyperchannel able to programme respectively and is connected, microprocessor is controlled hyperchannel able to programme according to user's steering order and is patrolled and examined the measurement function module, the user one by one to multichannel measured signal patrol and examine measurement, and show in real time and store these measurement data by the display of computer system by computer system, or to these data carry out sort operation, the numerical operation adding up, transfinite handles;
Microprocessor is connected with the function handover module, is used to produce the function switch-over control signal and comes the control function handover module, obtains the switching of the different measurement function of each passage;
Microprocessor is connected with the A/D conversion functional module, is used to produce the A/D changeover control signal and reads the A/D translation data.
Described hyperchannel able to programme is patrolled and examined the measurement function module and is comprised: load module, switch handover module; The measured multichannel input signal of hyperchannel inserts the measuring junction H of load module
InAnd L
OnThe output terminal of load module is connected with the input end of switch handover module, load module directly is connected with measured multichannel input signal, and exports to the switch handover module, by the switch handover module measured signal of each passage input is switched to the function handover module.
Described load module comprises: n passage comprises in each passage: the first gauge tap n1, the second gauge tap n2, the 3rd gauge tap n3; The measurement high terminal H of the measured signal of each passage and the first gauge tap n1 wherein
InHang down terminal L with measuring
OnConnect the measurement high terminal H of the first gauge tap n1
InBe connected with the end of the second gauge tap n2, terminal L is hanged down in the end of the 3rd gauge tap n3 and the measurement of the first gauge tap n1
OnConnect; The other end of the 3rd gauge tap n3 and the second gauge tap n2 respectively with the input two ends H of switch handover module
N0And L
N0Connect.
Described load module, when passage n is measured as voltage signal by the user:
First gauge tap of passage n remains the state of disconnection, and second gauge tap of passage n and the 3rd gauge tap then begin action according to user's the instruction of patrolling and examining;
When passage n was patrolled and examined measurement, with second gauge tap and the 3rd gauge tap closure of passage n, like this, measured voltage signal will be connected to switch handover module input end;
Otherwise, when passage n is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, second gauge tap and the 3rd gauge tap of passage n disconnected.
Described load module, when passage n is measured as current signal by the user:
When initial, the first gauge tap closure of passage n, second gauge tap and the 3rd gauge tap disconnect;
When passage n is patrolled and examined when measuring, disconnect earlier with second gauge tap and the 3rd gauge tap closure of passage n, and then with first gauge tap of passage n, like this, the measured currents signal will be connected to switch handover module input end;
Otherwise, when passage n is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, can be earlier with the first gauge tap closure of passage n, and then second gauge tap and the 3rd gauge tap of passage n disconnected.
Described switch handover module comprises: n passage, each passage is made up of five gauge tap, and the n passage is made up of five gauge tap: the 4th gauge tap n4, the 5th gauge tap n5, the 6th gauge tap n6, the 7th gauge tap n7, the 8th gauge tap n8;
The input end H of n passage
N0Be connected the input end L of n passage with the 4th gauge tap n4, the 6th gauge tap n6 with the end of the 8th gauge tap n8 respectively
N0Be connected with the end of the 7th gauge tap n7 with the 5th gauge tap n5 respectively;
The input end H of the other end of the 6th gauge tap n6 and function handover module
IIConnect; The 7th gauge tap n7 and function handover module input end L
OIConnect; The 4th gauge tap n4 and function handover module input end H
ISConnect; The 5th gauge tap n5 and function handover module input end L
OSConnect; The 8th gauge tap n8 and function handover module input end I
INConnect.
Described switch handover module, when passage n is measured as voltage signal by the user:
The 4th gauge tap of passage n and the 5th gauge tap then begin action according to user's the instruction of patrolling and examining;
When passage n was patrolled and examined measurement, with the 4th gauge tap and the 5th gauge tap closure of passage n, like this, measured voltage signal will be connected to the input end H of function handover module
IIAnd L
OI
Otherwise, when passage n is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, the 4th gauge tap and the 5th gauge tap of passage n disconnected.
Described switch handover module, when passage n is measured as current signal by the user:
The 8th gauge tap of passage n and the 5th gauge tap then begin action according to user's the instruction of patrolling and examining;
When passage n was patrolled and examined measurement, with the 8th gauge tap and the 5th gauge tap closure of passage n, like this, the measured currents signal will be connected to the input end I of function handover module 2
INAnd L
OI
Otherwise, when passage n is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, the 8th gauge tap and the 5th gauge tap of passage n disconnected.
Described switch handover module, when passage n is measured input end or ratio reference voltage signal measurement input end by the user as four-wire ohm:
The 6th gauge tap of passage n and the 7th gauge tap then begin action according to user's the instruction of patrolling and examining;
When passage n was patrolled and examined measurement, with the 6th gauge tap and the 7th gauge tap closure of passage n, like this, measured voltage signal will be connected to the input end H of function handover module
ISAnd L
OS
Otherwise, when passage n is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, the 6th gauge tap and the 7th gauge tap of passage n disconnected.
The utlity model has digital multimeter that hyperchannel able to programme patrols brake is patrolled and examined modules such as measurement function module, function handover module, AFE (analog front end) signal Processing, A/D conversion functional module, microprocessor, communication interface and constitutes by hyperchannel able to programme.The user informs microprocessor via communication interface modules with the controlling schemes that hyperchannel patrols brake by computer system, remove to control hyperchannel able to programme by microprocessor again according to user's steering order then and patrol and examine the measurement function module, the user just can patrol and examine measurement to the multichannel measured signal afterwards, and can show, store these measurement data in real time, also can carry out sort operation, many-sided numerical operation such as add up, transfinite handles these data.
By the detailed description below in conjunction with accompanying drawing, foregoing of the present utility model, feature and advantage will become more apparent.
Description of drawings
Fig. 1 the utlity model has hyperchannel able to programme and patrols and examines measurement function digital multimeter block diagram
Fig. 2 the utility model hyperchannel able to programme is patrolled and examined the measurement function block diagram
Fig. 3 the utility model hyperchannel able to programme is patrolled and examined measurement function module embodiment circuit theory diagrams
Embodiment
Below in conjunction with accompanying drawing the present invention is specified.Be noted that the described example of executing only is considered as illustrative purposes, rather than limitation of the present invention.
The utlity model has hyperchannel able to programme according to Fig. 1 and patrol and examine shown in the functional block diagram of digital multimeter of measurement function, comprising: hyperchannel able to programme is patrolled and examined measurement function module 1, function handover module 2, AFE (analog front end) signal processing module 3, A/D conversion functional module 4, computer system 5, microprocessor 6, communication interface modules 7; Wherein:
The input end of function handover module 2 and output terminal patrol and examine the output terminal of measurement function module 1 with hyperchannel able to programme respectively and the input end of AFE (analog front end) signal processing module 3 is connected in series, be used for the signal of each passage input is carried out the function switching, and export to AFE (analog front end) signal processing module 3 and carry out signal condition;
The output terminal of AFE (analog front end) signal processing module 3 is connected with the input end of A/D conversion functional module 4, makes conditioned signal that AFE (analog front end) signal processing module 3 produces by A/D conversion functional module 4 analog signal conversion be become digital signal;
Communication interface modules 7 is connected with microprocessor 6 with computer system 5 respectively, and the user informs microprocessor 6 via communication interface modules 7 with the controlling schemes that hyperchannel patrols brake by computer system 5;
Microprocessor 6 is patrolled and examined measurement function module 1, function handover module 2 and A/D conversion functional module 4 with hyperchannel able to programme respectively and is connected, microprocessor 6 is controlled hyperchannel able to programme according to user's steering order and is patrolled and examined measurement function module 1, the user one by one to multichannel measured signal patrol and examine measurement, and show in real time and by computer system 5 these measurement data of storage by the display of computer system 5, or to these data carry out sort operation, the numerical operation adding up, transfinite handles;
Processor 6 is connected with function handover module 2, is used to produce the function switch-over control signal and comes control function handover module 2, obtains the switching of the different measurement function of each passage;
Microprocessor 6 is connected with A/D conversion functional module 4, is used to produce the A/D changeover control signal and reads the A/D translation data.
Except foregoing description, specifically also will select to realize the needed relevant parts of the utility model, but these selections not to restriction of the present utility model according to practical measurement requirement, but a concrete example, concrete selection is as follows:
Function handover module 2: the function change-over switch matrix that adopts relay and analog switch to form;
AFE (analog front end) signal processing module 3: comprise combined-voltage signal conditioning circuit, ac and dc current signal conditioning circuit, resistance measuring circuit, capacitance measurement circuit, temperature measuring circuit, frequency and period measurement circuit; Can adopt prior art multimeter the AFE (analog front end) signal processing module or design as requested, this module is not at the utility model protection domain.
A/D conversion functional module 4: use integrated ADC modulus conversion chip;
Computer system 5: desktop computer or notebook computer;
Microprocessor 6:DSP processor;
Communication interface modules 7: communicate with computer system 5 by USB interface;
Patrol and examine shown in the measurement function block diagram according to Fig. 2 the utility model hyperchannel able to programme:
Described hyperchannel able to programme patrols brake module 1 and comprises: load module 11, switch handover module 12; The measured multichannel input signal of hyperchannel inserts load module 11 measuring junction H
InAnd L
OnThe output terminal of load module 11 is connected with the input end of switch handover module 12, load module 11 directly is connected with measured multichannel input signal, and export to switch handover module 12, the measured signal of each passage being imported by switch handover module 12 switches to function handover module 2, function handover module 2 is again according to the requirement of each channel measurement function of user's appointment, the AFE (analog front end) signal processing circuit that signal is inputed to one by one corresponding function is carried out signal condition again, to satisfy the input request signal of A/D conversion functional module 4.When n=1, the measuring junction H of passage 1
InAnd L
OnBe H
I1And L
O1, when n=2, the measuring junction of passage 2 is H
I2And L
O2, that is to say that how many measuring junctions of how many passages just has to being H
InAnd L
On
Patrol and examine according to Fig. 3 the utility model hyperchannel able to programme shown in the embodiment circuit theory diagrams of measurement function module 1: this block diagram mainly comprise 3 parts: the input end of load module 11, switch handover module 12, function handover module 2 (also being the output terminal of switch handover module 12).Load module 11, switch handover module 12 can adopt relay to form or simulant electronic switch is formed.
Load module 11: passage 1 (passage 2 ..., passage n) measurand insert H
I1～H
InAnd L
O1～L
OnEnd, measurand comprise combined-voltage, two line resistances, electric capacity, temperature, frequency and cycle, diode test and short-circuit test.
Switch handover module 12: finish the patrol and examine measurement function of digital multimeter, use switch that the measurand of each passage is switched the input end that is connected to function handover module 2 here to each input channel measurand.
The input end of function handover module 2 comprises: H
IIAnd L
OIInput end, H
ISAnd L
OSInput end, I
INThe ac and dc current input end.
According to the utility model, described load module 11 comprises: the first gauge tap n1, the second gauge tap n2, the 3rd gauge tap n3, n measures high terminal H
InMeasure low terminal L with n
On, n=1 wherein, 2,3 ...Passage n is made up of three gauge tap, wherein comprises in each passage: first gauge tap, second gauge tap, the 3rd gauge tap; The measurement high terminal H of the measured signal of each passage and first gauge tap
InHang down terminal L with measuring
OnConnect the measurement high terminal H of first gauge tap
InBe connected with an end of second gauge tap, terminal L is hanged down in an end of the 3rd gauge tap and the measurement of first gauge tap
OnConnect; The other end of the 3rd gauge tap and second gauge tap respectively with the input two ends H of switch handover module
N0And L
N0Connect.
For example during n=1, passage is 1, and passage is that first gauge tap 11, second gauge tap 12, the 3rd gauge tap 13, the 1 are measured high terminal H in 1
I1With the low terminal L of the 1st measurement
O1, n=1 wherein, 2,3 ...Passage 1 is made up of three gauge tap, wherein comprises in each passage: first gauge tap, second gauge tap, the 3rd gauge tap; The measurement high terminal H of the measured signal of each passage and first gauge tap wherein
I1Hang down terminal L with measuring
O1Connect the measurement high terminal H of first gauge tap
I1Be connected with an end of second gauge tap, terminal L is hanged down in an end of the 3rd gauge tap and the measurement of first gauge tap
O1Connect; The other end of the 3rd gauge tap and second gauge tap respectively with the input two ends H of switch handover module
10And L
10Connect.Other passage situation is analogized.
For example during n=2, passage is 2, and passage is that first gauge tap 21, second gauge tap 22, the 3rd gauge tap 23, the 2 are measured high terminal H in 2
I2With the low terminal L of the 2nd measurement
O2, passage 2 is made up of three gauge tap, wherein comprises in each passage: first gauge tap, second gauge tap, the 3rd gauge tap; The measurement high terminal H of the measured signal of each passage and first gauge tap wherein
I2Hang down terminal L with measuring
O2Connect the measurement high terminal H of first gauge tap
I2Be connected with an end of second gauge tap, terminal L is hanged down in an end of the 3rd gauge tap and the measurement of first gauge tap
O2Connect; The other end of the 3rd gauge tap and second gauge tap respectively with the input two ends H of switch handover module
20And L
20Connect.Other passage situation is analogized.
A. when passage 1 was measured as voltage signal by the user, first gauge tap of passage 1 remained the state of disconnection, and second gauge tap of passage 1 and the 3rd gauge tap then begin action according to user's the instruction of patrolling and examining.When passage 1 was patrolled and examined measurement, with second gauge tap and the 3rd gauge tap closure of passage 1, like this, measured voltage signal will be connected to switch handover module 12 input ends; Otherwise, when passage 1 is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, second gauge tap and the 3rd gauge tap of passage 1 disconnected.Or require selector channel n according to personalization.
B. when passage 2 was measured as current signal by the user, at the beginning, with the first gauge tap closure of passage 2, second gauge tap and the 3rd gauge tap disconnected.When passage 2 is patrolled and examined when measuring, disconnect earlier with second gauge tap and the 3rd gauge tap closure of passage 2, and then with first gauge tap of passage 2, like this, the measured currents signal will be connected to switch handover module 12 input ends; Otherwise, when passage 2 is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, can be earlier with the first gauge tap closure of passage 2, and then second gauge tap and the 3rd gauge tap of passage 2 disconnected.Or require selector channel n according to personalization.
According to the utility model, described switch handover module comprises: described switch handover module comprises: passage n, each passage is made up of five gauge tap, when selecting n=1,2,3 ... the time, the n passage is made up of five gauge tap: the 4th gauge tap n4, the 5th gauge tap n5, the 6th gauge tap n6, the 7th gauge tap n7, the 8th gauge tap n8;
The input end H of n passage
N0Be connected the input end L of n passage with the 4th gauge tap n4, the 6th gauge tap n6 with the end of the 8th gauge tap n8 respectively
N0Be connected with the end of the 7th gauge tap n7 with the 5th gauge tap n5 respectively;
The input end H of the other end of the 6th gauge tap n6 and function handover module 2
IIConnect; The 7th gauge tap n7 and function handover module 2 input end L
OIConnect; The 4th gauge tap n4 and function handover module 2 input end H
ISConnect; The 5th gauge tap n5 and function handover module 2 input end L
OSConnect; The 8th gauge tap n8 and function handover module 2 input end I
INConnect.
For example: when selecting n=1, passage 1 is made up of five gauge tap: the 4th gauge tap 14, the 5th gauge tap 15, the 6th gauge tap 16, the 7th gauge tap 17, the 8th gauge tap 18;
The input end H of the 1st passage
10Be connected the input end L of the 1st passage with an end of the 8th gauge tap 18 with the 4th gauge tap 14, the 6th gauge tap 16 respectively
10Be connected with the end of the 5th gauge tap 15 respectively with the 7th gauge tap 17;
The input end H of the other end of the 6th gauge tap 16 and function handover module 2
IIConnect; The 7th gauge tap n7 and function handover module 2 input end L
OIConnect; The 4th gauge tap 14 and function handover module 2 input end H
ISConnect; The 5th gauge tap 15 and function handover module 2 input end L
OSConnect; The 8th gauge tap 18 and function handover module 2 input end I
INConnect.Other passage situation is analogized.
A. when passage 1 was measured as voltage signal by the user, the 4th gauge tap of passage 1 and the 5th gauge tap then began action according to user's the instruction of patrolling and examining.When passage 1 was patrolled and examined measurement, with the 4th gauge tap and the 5th gauge tap closure of passage 1, like this, measured voltage signal will be connected to the input end H of function handover module 2
IIAnd L
OIOtherwise, when passage 1 is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, the 4th gauge tap and the 5th gauge tap of passage 1 disconnected.Or require selector channel n according to personalization.
B. when passage 2 was measured as current signal by the user, the 8th gauge tap of passage 2 and the 5th gauge tap then began action according to user's the instruction of patrolling and examining.When passage 2 was patrolled and examined measurement, with the 8th gauge tap and the 5th gauge tap closure of passage 2, like this, the measured currents signal will be connected to the input end I of function handover module 2
INAnd L
OIOtherwise, when passage 2 is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, the 8th gauge tap and the 5th gauge tap of passage 2 disconnected.Or require selector channel n according to personalization.
C. when passage 3 was measured input end or ratio reference voltage signal measurement input end by the user as four-wire ohm, the 6th gauge tap of passage 3 and the 7th gauge tap then began action according to user's the instruction of patrolling and examining.When passage 3 was patrolled and examined measurement, with the 6th gauge tap and the 7th gauge tap closure of passage 3, like this, measured voltage signal will be connected to the input end H of function handover module 2
ISAnd L
OSOtherwise, when passage 3 is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, the 6th gauge tap and the 7th gauge tap of passage 3 disconnected.Or require selector channel n according to personalization.
Each passage of the utility model digital multimeter, the user can the specified measurement function, measurement is patrolled and examined in programming arbitrarily, and for example: the user can define channel n be function passages such as voltage measurement passage, current measurement passage, two line resistances measurement passage, electric capacity, temperature, frequency or cycle; The user also can define channel n and passage n+1 form four-wire ohm and measure passage, ratio measure passage.In addition, the user also can measure order, number of times, the time that passage patrols survey and patrols the rate of testing the speed and programme arbitrarily each, and such programmable way more can provide a lot of measurement dirigibility and convenient and practical property to the user.
The utility model is particularly:
When 1) user set passage 1 realization combined-voltage, two line resistances, electric capacity, temperature, frequency and cycle, diode test and short-circuit test measurement: first gauge tap 11 of passage 1, the 6th gauge tap 16, the 7th gauge tap 17, the 8th gauge tap 18 remained the state of disconnection, and second gauge tap 12 of passage 1, the 3rd gauge tap 13, the 4th gauge tap 14, the 5th gauge tap 15 then begin action according to user's the instruction of patrolling and examining.When passage 1 is patrolled and examined measurement, second gauge tap 12, the 3rd gauge tap 13, the 4th gauge tap 14, the 5th gauge tap 15 of passage 1 is all closed, like this, passage H
I1Be connected to function handover module 2 input end H
II, passage L
O1Be connected to function handover module 2 input end L
OI, these signals are handled by the measurement of multimeter inner function module again, by communication interface modules 7 measured value are sent to computer system 5 at last and show in real time; Otherwise, when passage 1 is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, all gauge tap of passage 1 are all disconnected.
When 2) user sets passage 2 realization alterating and direct current flow measurements:
At the beginning, with first control, 21 switch closures of passage 2, other gauge tap of passage 2 comprises that second gauge tap 22, the 3rd gauge tap 23, the 4th gauge tap 24, the 5th gauge tap 25, the 6th gauge tap 26, the 7th gauge tap 27, the 8th gauge tap 28 all disconnect.When passage 2 is patrolled and examined when measuring, disconnect earlier with second gauge tap 22, the 3rd gauge tap 23, the 5th gauge tap 25, the 8th gauge tap 28 closures of passage 2, and then with first gauge tap 21 of passage 2, at this moment passage H
I2Be connected to function handover module 2 input end I
IN, passage L
O2Be connected to function handover module 2 input end L
OI, just can carry out this current measurement.
Simple signal measurement flow process is as follows:
The measured currents signal has been connected to function handover module 2, switch through the function of function handover module 2 again, tested current signal is sent to AFE (analog front end) signal processing module 3, AFE (analog front end) signal processing module 3 is a voltage signal with the measured currents conversion of signals again, afterwards, this voltage signal continues to simulated front end signal processing module 3 and carries out the conditioning of signal.At last, this voltage signal passes through the conversion of the simulating signal of A/D analog-to-digital conversion module 4 to digital signal again, at this moment, measured voltage signal just has been quantified as one 2 system Serial No., this 2 system Serial No. is carried out some mathematical operation and unit conversion by microprocessor unit 6 again, will be converted to the current value of the decimal representation that we are familiar with, just the size of measured currents signal finally is sent to computer system 5 by communication interface modules 7 with this current value and carries out showing not in real time.
Otherwise, when passage 2 is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, can be earlier with first gauge tap, 21 closures of passage 2, and then other gauge tap of passage 2 comprised that second gauge tap 22, the 3rd gauge tap 23, the 4th gauge tap 24, the 5th gauge tap 25, the 6th gauge tap 26, the 7th gauge tap 27, the 8th gauge tap 28 all disconnect.
3) user sets passage 1 and passage 2 is finished four-wire ohm, ratio measure function, wherein passage 1 is used as four-wire ohm primary input end or ratio measure primary input end by the user, passage 2 is measured input end by the user as four-wire ohm or the ratio reference voltage signal is measured input end, make switch 12,13,14,15 and switch 22,23,26,27 closures, other switch is in open mode, at this moment passage H
I1Be connected to function handover module 2 input end H
II, passage L
O1Be connected to function handover module 2 input end L
OI, passage H
I2Be connected to function handover module 2 input end H
IS, passage L
O2Be connected to function handover module 2 input end L
OS, just carry out this functional measurement.
The 6th gauge tap n6 in each passage of the second gauge tap n2 in each passage of described load module, the 3rd gauge tap n3 and described switch handover module, the 7th gauge tap n7, in a passage, can select the pair of control switch for use, or select two pairs of gauge tap for use.
The utlity model has major advantage that hyperchannel able to programme patrols the digital multimeter of brake and be the user and can patrol and examine measurement what each measurand of measuring passage was programmed arbitrarily.The utility model adopts the digital multimeter front end to increase the programmable matrix switch, can carry out any measurement programming to the multichannel measurand, has realized the Based Intelligent Control measurement.Solve present multimeter passage single, use dumb, can not carry out intelligent data acquisition; Simultaneously also solved the user when certain measuring-signal is carried out the measurement of a plurality of functions, user's troublesome poeration can not adapt to the problem that typical products in mass production detects needs.So just make digital multimeter intelligent more in the actual production field tests, function is more powerful, and is practical more.Newly being of the utility model digital multimeter: hyperchannel able to programme is patrolled and examined measurement function, and the user can realize that there is essential distinction intelligent data acquisition and it.
Explanation at last: top description is to be used to realize the utility model and embodiment, yet it is not in order to limit the utility model, those of ordinary skills can be according to the definite concrete mode that will use of actual conditions, in the spirit and scope that do not break away from present technique, all should belong to scope of the present utility model, therefore, scope of the present utility model should not described by this and limit.It should be appreciated by those skilled in the art,, all belong to the utility model claim and come restricted portion in any modification or partial replacement that does not break away from the utility model scope.
Claims (9)
1, a kind of have a digital multimeter that hyperchannel able to programme is patrolled and examined measurement function, and it is characterized in that: comprising: hyperchannel able to programme is patrolled and examined measurement function module, function handover module, AFE (analog front end) signal processing module, A/D conversion functional module, computer system, microprocessor, communication interface modules;
The input end of function handover module and output terminal patrol and examine the output terminal of measurement function module with hyperchannel able to programme respectively and the input end of AFE (analog front end) signal processing module is connected in series;
The output terminal of AFE (analog front end) signal processing module is connected with the input end of A/D conversion functional module;
The A/D conversion functional module is connected with microprocessor;
Computer system is connected with communication interface modules respectively with microprocessor;
The steering order end of microprocessor is connected with the control end that hyperchannel able to programme is patrolled and examined the measurement function module;
The function switch-over control signal end of microprocessor is connected with the measurement function switch terminal of function handover module.
2, have a digital multimeter that hyperchannel able to programme is patrolled and examined measurement function according to claim 1 is described, it is characterized in that: described hyperchannel able to programme is patrolled and examined the measurement function module and is comprised: load module, switch handover module; Multichannel input signal termination is gone into the measuring junction HI of load module
nAnd LO
n, the output terminal of load module is connected with the input end of switch handover module, and the output terminal of switch handover module is connected with the function handover module.
3, has a digital multimeter that hyperchannel able to programme is patrolled and examined measurement function according to claim 2 is described, it is characterized in that: described load module comprises: n passage comprises in each passage: the first gauge tap n1, the second gauge tap n2, the 3rd gauge tap n3; The measurement high terminal HI of the measured signal of each passage and the first gauge tap n1 wherein
nHang down terminal LO with measuring
nConnect the measurement high terminal HI of the first gauge tap n1
nBe connected with the end of the second gauge tap n2, terminal LO is hanged down in the end of the 3rd gauge tap n3 and the measurement of the first gauge tap n1
nConnect; The other end of the 3rd gauge tap n3 and the second gauge tap n2 respectively with the input two ends Hn of switch handover module
0And Ln
0Connect.
4, describedly have a digital multimeter that hyperchannel able to programme is patrolled and examined measurement function according to claim 2 or 3, it is characterized in that, when described load module, passage n are measured as voltage signal:
First gauge tap of passage n disconnects, second gauge tap of passage n and the 3rd gauge tap closure;
Passage n is patrolled and examined when measuring, second gauge tap of passage n and the 3rd gauge tap closure, and measured voltage signal is connected to switch handover module input end;
Passage n is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, and second gauge tap of passage n and the 3rd gauge tap disconnect.
5, describedly have a digital multimeter that hyperchannel able to programme is patrolled and examined measurement function according to claim 2 or 3, it is characterized in that, when described load module, passage n are measured as current signal:
The first gauge tap closure of passage n, second gauge tap and the 3rd gauge tap disconnect;
Passage n is patrolled and examined when measuring, second gauge tap of passage n and the 3rd gauge tap closure, and first gauge tap of passage n disconnects, and the measured currents signal is connected to switch handover module input end;
When passage n is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, the first gauge tap closure of passage n, second gauge tap of passage n and the 3rd gauge tap disconnect.
6, has a digital multimeter that hyperchannel able to programme patrols brake according to claim 2 is described, it is characterized in that: described switch handover module comprises: n passage, each passage is made up of five gauge tap, and the n passage is made up of five gauge tap: the 4th gauge tap n4, the 5th gauge tap n5, the 6th gauge tap n6, the 7th gauge tap n7, the 8th gauge tap n8;
The input end Hn of n passage
0Be connected the input end Ln of n passage with the 4th gauge tap n4, the 6th gauge tap n6 with the end of the 8th gauge tap n8 respectively
0Be connected with the end of the 7th gauge tap n7 with the 5th gauge tap n5 respectively;
The input end HI of the other end of the 6th gauge tap n6 and function handover module
IConnect; The 7th gauge tap n7 and function handover module input end LO
IConnect; The 4th gauge tap n4 and function handover module input end HI
SConnect; The 5th gauge tap n5 and function handover module input end LO
SConnect; The 8th gauge tap n8 and function handover module input end II
NConnect.
7, describedly have a digital multimeter that hyperchannel able to programme patrols brake according to claim 2 or 6, it is characterized in that, when described switch handover module, passage n are measured as voltage signal by the user:
The 4th gauge tap of passage n and the 5th gauge tap closure;
Passage n is patrolled and examined when measuring, the 4th gauge tap of passage n and the 5th gauge tap closure, and measured voltage signal is connected to the input end HI of function handover module
IAnd LO
I
Passage n is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, and the 4th gauge tap of passage n and the 5th gauge tap disconnect.
8, describedly have a digital multimeter that hyperchannel able to programme patrols brake according to claim 2 or 6, it is characterized in that, when described switch handover module, passage n are measured as current signal by the user:
The 8th gauge tap of passage n and the 5th gauge tap closure;
Passage n is patrolled and examined when measuring, the 8th gauge tap of passage n and the 5th gauge tap closure, and the measured currents signal is connected to the input end II of function handover module 2
NAnd LO
I
Passage n is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, and the 8th gauge tap and the 5th gauge tap of passage n disconnected.
9, describedly have a digital multimeter that hyperchannel able to programme patrols brake according to claim 2 or 6, it is characterized in that, when described switch handover module, passage n are measured input end or ratio reference voltage signal and are measured input end as four-wire ohm by the user:
The 6th gauge tap of passage n and the 7th gauge tap closure;
Passage n is patrolled and examined when measuring, the 6th gauge tap of passage n and the 7th gauge tap closure, and measured voltage signal is connected to the input end HI of function handover module
SAnd LO
S
Passage n is not measured by not patrolling and examining or user when patrolling and examining the passage of measuring other, and the 6th gauge tap of passage n and the 7th gauge tap disconnect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620023078 CN200989915Y (en) | 2006-06-14 | 2006-06-14 | Digital universal meter with programmable multichannel inspection measurement function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620023078 CN200989915Y (en) | 2006-06-14 | 2006-06-14 | Digital universal meter with programmable multichannel inspection measurement function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200989915Y true CN200989915Y (en) | 2007-12-12 |
Family
ID=38940952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620023078 Expired - Lifetime CN200989915Y (en) | 2006-06-14 | 2006-06-14 | Digital universal meter with programmable multichannel inspection measurement function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200989915Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839932A (en) * | 2009-03-19 | 2010-09-22 | 北京普源精电科技有限公司 | Measuring equipment |
| CN102129224A (en) * | 2010-01-16 | 2011-07-20 | 鸿富锦精密工业（深圳）有限公司 | Input device and environment monitoring system having same |
| CN102621433A (en) * | 2012-04-18 | 2012-08-01 | 潍柴动力股份有限公司 | Failure detection equipment for sensors of internal combustion engine |
| CN103197112A (en) * | 2013-03-19 | 2013-07-10 | 优利德科技(中国)有限公司 | Intelligent digital type multimeter |
| CN105823917A (en) * | 2016-04-25 | 2016-08-03 | 优利德科技(中国)有限公司 | Method for simultaneously monitoring current and temperature or simultaneously monitoring voltage and current and dual-mode instrument |
| CN106568997A (en) * | 2016-11-15 | 2017-04-19 | 深圳市鼎阳科技有限公司 | Switching control method and device of multimeter current range |
| CN110987026A (en) * | 2019-12-17 | 2020-04-10 | 华中科技大学 | Sensor signal acquisition system based on variable topology switch matrix |
| CN113804992A (en) * | 2020-06-16 | 2021-12-17 | 普源精电科技股份有限公司 | Test function module, multifunctional test system and method |
-
2006
- 2006-06-14 CN CN 200620023078 patent/CN200989915Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839932A (en) * | 2009-03-19 | 2010-09-22 | 北京普源精电科技有限公司 | Measuring equipment |
| CN101839932B (en) * | 2009-03-19 | 2014-06-25 | 北京普源精电科技有限公司 | Measuring equipment |
| CN102129224A (en) * | 2010-01-16 | 2011-07-20 | 鸿富锦精密工业（深圳）有限公司 | Input device and environment monitoring system having same |
| CN102129224B (en) * | 2010-01-16 | 2014-04-30 | 鸿富锦精密工业（深圳）有限公司 | Input device and environment monitoring system having same |
| CN102621433A (en) * | 2012-04-18 | 2012-08-01 | 潍柴动力股份有限公司 | Failure detection equipment for sensors of internal combustion engine |
| CN103197112A (en) * | 2013-03-19 | 2013-07-10 | 优利德科技(中国)有限公司 | Intelligent digital type multimeter |
| CN105823917A (en) * | 2016-04-25 | 2016-08-03 | 优利德科技(中国)有限公司 | Method for simultaneously monitoring current and temperature or simultaneously monitoring voltage and current and dual-mode instrument |
| CN106568997A (en) * | 2016-11-15 | 2017-04-19 | 深圳市鼎阳科技有限公司 | Switching control method and device of multimeter current range |
| CN106568997B (en) * | 2016-11-15 | 2019-06-07 | 深圳市鼎阳科技有限公司 | A kind of multimeter current range method for handover control and device |
| CN110987026A (en) * | 2019-12-17 | 2020-04-10 | 华中科技大学 | Sensor signal acquisition system based on variable topology switch matrix |
| CN110987026B (en) * | 2019-12-17 | 2021-11-02 | 华中科技大学 | Sensor signal acquisition system based on variable topology switch matrix |
| CN113804992A (en) * | 2020-06-16 | 2021-12-17 | 普源精电科技股份有限公司 | Test function module, multifunctional test system and method |
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