CN204302347U - Microcomputer-recognized intelligent universal meter - Google Patents

Microcomputer-recognized intelligent universal meter Download PDF

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Publication number
CN204302347U
CN204302347U CN201420764582.6U CN201420764582U CN204302347U CN 204302347 U CN204302347 U CN 204302347U CN 201420764582 U CN201420764582 U CN 201420764582U CN 204302347 U CN204302347 U CN 204302347U
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China
Prior art keywords
module
detection module
circuit
interchange
microcomputer
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420764582.6U
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Chinese (zh)
Inventor
王朝龙
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Kunming Bridge And Tunnel Management Co Ltd
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Kunming Bridge And Tunnel Management Co Ltd
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Priority to CN201420764582.6U priority Critical patent/CN204302347U/en
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Publication of CN204302347U publication Critical patent/CN204302347U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a kind of microcomputer-recognized intelligent universal meter, break-make detection module, power module, noncontact interchange, direct current detection module, noncontact interchange, DC voltage detection module, resistance, electric capacity, diode detection module, triode detection module, contactless temperature detection module respectively with micro computer model calling, micro computer module is connected with 4.3 cun of TFT displays.Solve problems of the prior art: alternating current, DC current non-cpntact measurement, automatic identification interchange, DC current type, automatic identification interchange, DC voltage, resistance, electric capacity, diode automatically identify and measure, triode automatically identifies and measures relevant parameter, increase contactless temperature to detect, use rechargeable lithium ion batteries to substitute 9V battery, the range of voltage, electric current, resistance, electric capacity, temperature is selected automatically.

Description

Microcomputer-recognized intelligent universal meter
Technical field
The utility model belongs to checkout equipment technical field, relates to a kind of microcomputer-recognized intelligent universal meter.
Background technology
There are pointer multimeter and digital multimeter in present market, there is variety of problems in actual use.
1, DC current, alternating current can not non-cpntact measurement, gauge outfit series connection could must be measured in circuit.Actual use, gauge outfit serial connection in circuit except safe voltage is feasible but also inconvenient, other forceful electric power uses the measurement of serial connection gauge outfit to be breakneck.Present market goes out pincerlike meter non-cpntact measurement to make up.But most of pincerlike meter can only measure alternating current, can not DC current be measured, must make up with other instruments if DC current will be measured.Unification is not integrated on one piece of table.
2, automatically can not identify voltage type, will distinguish one from the other during measuring voltage DC voltage or alternating voltage could be measured.A lot of universal meter range can not automatically switch, and each measurement is all pretty troublesome, if may show to burn out when small-range measures large voltage.
3, resistance, electric capacity, diode can not automatically identify and measure relevant parameter.
4, triode can not automatically identify and automatically detect relevant parameter.
5, break-make gear can not live line measurement, and live line measurement break-make can burn out universal meter.
6, do not have temperature inspection, in actual use, we will see that device temperature or the temperature of some contact points must have been come with other instruments.
7, present digital multimeter is 9V battery, and the battery of other magnitudes of voltage unavailable replaces, and can not charge, price, and waste is large, changes and bothers.
Now commercially do not have intelligent universal meter to solve the variety of problems of conventional universal meter, develop the very with practical value and economic worth of the universal meter that can overcome the above problems.
Utility model content
The purpose of this utility model is to provide a kind of microcomputer-recognized intelligent universal meter, solve problems of the prior art: alternating current, DC current non-cpntact measurement, automatic identification exchanges, DC current type, automatic identification exchanges, DC voltage, resistance, electric capacity, diode automatically identifies and measures, triode automatically identifies and measures relevant parameter, break-make gear also can be measured under circuit not powering-off state, increase contactless temperature to detect, rechargeable lithium ion batteries is used to substitute 9V battery, voltage, electric current, resistance, electric capacity, the range of temperature is selected automatically.
The technical scheme that the utility model adopts is, a kind of microcomputer-recognized intelligent universal meter, break-make detection module, power module, noncontact interchange, direct current detection module, noncontact interchange, DC voltage detection module, resistance, electric capacity, diode detection module, triode detection module, contactless temperature detection module respectively with micro computer model calling, micro computer module is connected with 4.3 cun of TFT displays.
Feature of the present utility model is also, micro computer module intermediate range controlled relay group is connected with micro-control module respectively with microcontroller drive circuit.
Test side in break-make detection module connects electric isolution coupler, signal generator successively.
Battery charger in power module is connected with lithium ion battery, DC/DC conversion module successively.
Interchange in noncontact interchange, direct current detection module, DC current discrimination circuit successively with the first precise rectification circuit, the first low pass filter, the first gain amplifying circuit, an ADC model calling, exchange, DC current discrimination circuit also successively with the second gain amplifying circuit, the 2nd ADC model calling.
The interchange of noncontact interchange, DC voltage detection module, DC voltage discrimination circuit successively with the 3rd precise rectification circuit, the 3rd low pass filter, the 3rd gain amplifying circuit, the 3rd ADC model calling; Interchange, DC voltage discrimination circuit are also directly connected with the 3rd low pass filter.
In resistance, electric capacity, diode detection module, AC signal generator, the first contact condition testing circuit, the first automatic detection circuit connect successively.
In triode detection module, the second contact condition testing circuit, the second automatic detection circuit, measuring multiple parameters circuit connect successively.
The Sino-Philippines Neil lens of contactless temperature detection module and I 2c temperature-measuring module connects.
The beneficial effects of the utility model are:
1, alternating current, DC current non-cpntact measurement, automatically identify current type, range is selected automatically, and in liquid crystal display display current type and size.
2, alternating voltage, DC voltage measurement, identify voltage type automatically, and range is selected automatically, and show voltage type and size by liquid crystal display.
3, resistance, electric capacity, diode identify and display device title and relevant parameter automatically, and resistance, electric capacity range are selected automatically, diode display silicon diode or germanium diode and tube voltage drop size.
4, triode detects automatically, and triode inserts and detects position, just can automatically detection transistor be positive-negative-positive or NPN type, be silicon triode or germanium triode; Good triode display multiplication factor, triode-type and material, it is bad that bad triode shows this triode, reinserts if insert the bad prompting of contact.
5, during break-make gear measuring circuit break-make, can measure when charged, this ensures that equipment also can safety detection circuit problem under continuous firing state.When down circuitry, not needing to discharge energy-storage travelling wave tube electric energy just can measuring circuit break-make situation.
6, in table, add contactless temperature detect, make in common survey, practicality is wider.
7, use lithium ion chargeable battery to substitute 9V battery, can repeatedly charge, reduce the effect that 9V battery is wasted and reached environmental protection.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is schematic diagram of the present utility model.
In figure, 1. micro computer module, 2.4.3 very little TFT display, 3. break-make detection module, 4. power module, 5. noncontact interchange, direct current detection module, 6. noncontact interchange, DC voltage detection module, 7. resistance, electric capacity, diode detection module, 8. triode detection module, 9. contactless temperature detection module;
101. micro-control module, 102. program control relay groups, 103. microcontroller drive circuits;
301. signal generators, 302. electric isolution couplers;
401.DC/DC conversion module, 402. lithium ion batteries, 403. battery chargers;
511. the one ADC modules, 512. first gain amplifying circuits, 513. first low pass filters, 514. first precise rectification circuits, 515. interchanges, DC current discrimination circuit, 521. the 2nd ADC modules, 522. second gain amplifying circuits;
601. the 3rd ADC modules, 602. the 3rd gain amplifying circuits, 603. the 3rd low pass filters, 604. the 3rd precise rectification circuits, 605. interchanges, DC voltage discrimination circuit;
701. first contact condition testing circuits, 702. first automatic detection circuits, 703. AC signal generators;
801. second contact condition testing circuits, 802. second automatic detection circuits, 803. measuring multiple parameters circuit;
901. luxuriant and rich with fragrance Neil lens, 902.I 2c temperature-measuring module.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Structure of the present utility model as shown in Figure 1, by 9 sub-module compositions, wherein, break-make detection module 3, power module 4, noncontact interchange, direct current detection module 5, noncontact interchange, DC voltage detection module 6, resistance, electric capacity, diode detection module 7, triode detection module 8, contactless temperature detection module 9 are connected with micro computer module 1 respectively, and micro computer module 1 is connected with 4.3 cun of TFT displays 2.
Each submodule inside connects:
Micro computer module 1 intermediate range controlled relay group 102 is connected with micro-control module 101 respectively with microcontroller drive circuit 103;
Test side in break-make detection module 3 connects electric isolution coupler 302, signal generator 301 successively;
Battery charger 403 in power module 4 is connected with lithium ion battery 402, DC/DC conversion module 401 successively;
Interchange in noncontact interchange, direct current detection module 5, DC current discrimination circuit 515 are connected with the first precise rectification circuit 514, first low pass filter 513, first gain amplifying circuit 512, an ADC module 511 successively, and interchange, DC current discrimination circuit 515 are also connected with the second gain amplifying circuit 522, the 2nd ADC module 521 successively;
Namely, if alternating current, test side-> exchanges, DC current discrimination circuit 515-> first precise rectification circuit 514-> first low pass filter 513-> first gain amplifying circuit 512-> the one ADC module 511.If DC current, test side-> exchanges, DC current discrimination circuit 515-> second gain amplifying circuit 522-> the 2nd ADC module 521.
Interchange, the DC voltage discrimination circuit 605 of noncontact interchange, DC voltage detection module 6 are connected with the 3rd precise rectification circuit 604, the 3rd low pass filter 603, the 3rd gain amplifying circuit 602, the 3rd ADC module 601 successively; Interchange, DC voltage discrimination circuit 605 are also directly connected with the 3rd low pass filter 603;
Namely, if alternating voltage, test side-> exchanges, DC voltage discrimination circuit 605-> the 3rd precise rectification circuit 604-> the 3rd low pass filter 603-> the 3rd gain amplifying circuit 602-> the 3rd ADC module 601; If DC voltage, test side-> exchanges, DC voltage discrimination circuit 605-> the 3rd low pass filter 603-> the 3rd gain amplifying circuit 602-> the 3rd ADC module 601.
Resistance, electric capacity, diode detection module 7: AC signal generator 703, first contact condition testing circuit 701, first automatic detection circuit 702 connects successively; I.e. test side and AC signal generator 703-> first contact condition testing circuit 701-> first automatic detection circuit 702;
In triode detection module 8, the second contact condition testing circuit 801, second automatic detection circuit 802, measuring multiple parameters circuit 803 connect successively;
The Sino-Philippines Neil lens 901 of contactless temperature detection module 9 and I 2c temperature-measuring module 902 connects.
Principle as shown in Figure 2,
1, alternating voltage, noncontact ac current measurement, measures input and exchanges ADC conversion->Cortex-M4 single-chip microcomputer->4.3TFT display screen by precision rectifying-> low pass filter-> gain amplification->.
2, DC voltage measurement, measures input low pass filter-> gain amplification-> and exchanges ADC conversion->Cortex-M4 single-chip microcomputer->4.3TFT display screen.
3, DC current non-cpntact measurement, measures input gain amplification-> direct current ADC conversion->Cortex-M4 single-chip microcomputer->4.3TFT display screen.
4, resistance, electric capacity, diode measurement, measuring cell under 1KHZ/10KHZ is ac-excited-> simulation opens a group->Cortex-M4 single-chip microcomputer->4.3TFT display screen.
5, triode is measured, and triode inserts three hole slots-> simulation and opens a group->Cortex-M4 single-chip microcomputer->4.3TFT display screen.
6, break-make is measured as contact-free measurement of temperature, break-make measurement->Cortex-M4 single-chip microcomputer->4.3TFT display screen.
7, contact-free measurement of temperature, IR measurement->Cortex-M4 single-chip microcomputer->4.3TFT display screen.
8, power management, 3.7V power supply->DC/DC conversion->+5V ,+3.3V ,-5V->Cortex-M4 single-chip microcomputer, ADC.
Alternating current, DC current non-cpntact measurement, automatically identify current type, range is selected automatically, and in liquid crystal display display current type and size.
Alternating current and DC current non-cpntact measurement are by being articulated on the cable of measured circuit by an external current clamp, the electromagnetic signal that the low current signal flowed through in cable produces is converted to by the sensor of current clamp the signal of telecommunication that electronic circuit can detect, this signal through precise rectification circuit, low-pass filter circuit, by gain amplifier amplify after be converted to the discernible data signal of CPU by ADC modules A D converter, the calibration algorithm and the conversion program that eventually pass the control program of micro-control module calculate, and draw actual tested current value.Thus realize alternating current and DC current non-cpntact measurement function.
Alternating voltage, DC voltage measurement, identify voltage type automatically, and range is selected automatically, and show voltage type and size by liquid crystal display.
Tested voltage directly accesses in this table by measuring pen by alternating voltage, DC voltage measurement, then after carrying out range dividing potential drop, precise rectification circuit, low pass filter filtering, gain amplifying circuit gain amplification, tested voltage transitions is data signal by the a/d converter of ADC module by signal, then send in micro-control module CPU and carry out Data correction, by can also auto-changing measurement range thus draw a high accuracy and magnitude of voltage accurately to the analysis of data.
Resistance, electric capacity, diode identify and display device title and relevant parameter automatically, and resistance, electric capacity range are selected automatically, diode display silicon diode or germanium diode and tube voltage drop size.
Resistance, electric capacity, diode are identified by the digital electric bridge circuit in circuit automatically, carry out valuation in advance to measured original paper, then carry out Classification and Identification and the classification and Detection of original paper classification according to the characteristic of all kinds of device.
Triode detects automatically, and triode inserts and detects position, just can automatically detection transistor be positive-negative-positive or NPN type, be silicon triode or germanium triode; Good triode display multiplication factor, triode-type and material, it is bad that bad triode shows this triode, reinserts if insert the bad prompting of contact.
By the direct conduction voltage drop of each pin of triode in detection insertion detection groove and current relationship, triode automatic detection function judges that measured triode is positive-negative-positive or NPN type, then identify by the current relationship detected between pin the type that each measures pin.If detected original paper does not meet electric current and the conducting relation of triode, the quality of tested triode can be judged, finally measurement result is shown on display screen.
During break-make gear measuring circuit break-make, can measure when charged, this ensures that equipment also can safety detection circuit problem under continuous firing state.When down circuitry, not needing to discharge energy-storage travelling wave tube electric energy just can measuring circuit break-make situation.
This break-make measurement function is linked in measured circuit by measuring test pencil, decision circuitry whether conducting time, signal is coupled a signal to last signal of surveying in one of them measurement test pencil by a measurement isolation coupling circuit and is transferred in the circuit of measurement by a communication data by this meter after amplifying circuit amplifies by isolation coupling circuit, if circuit connects, a then other meter tip of the brushstyle of a writing or painting just can receive the signal being sent out signal test pencil and sending, otherwise cannot receive measuring-signal.
In table, add contactless temperature detect, make in common survey, practicality is wider.
This meter is right against the surface of object being measured by contactless temperature measuring ability heat radiation energy by Fei Nier lens gathers a noncontact I 2in the measurement window of C temperature-measuring module, by the signal conversion of sensor, temperature value is converted to data signal, carries out digital calibration finally by micro-control module CPU and draw temperature value.
Use lithium ion chargeable battery to substitute 9V battery, can repeatedly charge, reduce the effect that 9V battery is wasted and reached environmental protection.
By perfect power management function and advanced power converter topology, being changed into by the conventional 9V battery that traditional measurement ammeter uses can the lithium ion battery that uses of recharge, thus achieves low power consumption high efficiency, thus reduces use cost and battery waste.
Each component function is as follows:
Micro computer module 1: microcontroller drive circuit starts micro-control module work, and micro-control module controls the orderly switching range of program control relay group or components and parts automatic measurement circuit; 4.3 cun of TFT displays 2 are for showing each measurement; Signal generator 301 produces high frequency ac signal and after transmitting terminal exports, sees whether signal obtains signal from receiving terminal by electric isolution coupler 302 by electric isolution coupler 302; 220V alternating current is charged by battery charger 403 pairs of lithium ion batteries 402, and lithium ion battery 402 is by exporting direct current+5V ,+3.3V and-5V voltage for system disparate modules after DC/DC conversion module 401;
Exchange after checking end input current signal, it is alternating current or DC current that DC current discrimination circuit 515 is distinguished, if alternating current then changes DC current into through the first precise rectification circuit 514, be that data signal allows micro-control module 101 process by being undertaken amplifying finally by an ADC module 511 analog-signal transitions by the first gain amplifying circuit 512 after the first low pass filter 513 filtering again, if direct current signal, being undertaken amplifying finally by the 2nd ADC module 521 analog-signal transitions by the second gain amplifying circuit 522 is that data signal allows micro-control module 101 process,
Exchange after checking end input voltage signal, it is alternating voltage or DC voltage that DC voltage discrimination circuit 605 is distinguished, if alternating voltage then changes DC voltage into through the 3rd precise rectification circuit 604, be that data signal allows micro-control module 101 process by being undertaken amplifying finally by the 3rd ADC module 601 analog-signal transitions by the 3rd gain amplifying circuit 602 after the 3rd low pass filter 603 filtering again, if direct current, be that data signal allows micro-control module 101 process by being undertaken amplifying finally by the 3rd ADC module 601 analog-signal transitions by the 3rd gain amplifying circuit 602 after the 3rd low pass filter 603 filtering,
Device is put in test side, the device put of first contact condition testing circuit 701 inspection whether good contact, produce ac-excited signal by device by AC signal generator 703, microprocessor is measured and is distinguished device classification and calculating parameter by the pumping signal of device;
Triode detection module 8: the second contact condition testing circuit 801 checks the device put whether good contact, it is PNP or NPN that second automatic detection circuit 802 microprocessor control automatic detection circuit distinguishes triode, be silicon materials or germanium material, microprocessor control measuring multiple parameters circuit 803 measures three pin arrangements and multiplication factor;
Contactless temperature detection module 9:I 2c temperature-measuring module 902 gathers the infrared ray by Fei Nier lens 901, calculates temperature value through microcontroller.

Claims (9)

1. a microcomputer-recognized intelligent universal meter, it is characterized in that, break-make detection module (3), power module (4), noncontact interchange, direct current detection module (5), noncontact interchange, DC voltage detection module (6), resistance, electric capacity, diode detection module (7), triode detection module (8), contactless temperature detection module (9) are connected with micro computer module (1) respectively, and micro computer module (1) is connected with 4.3 cun of TFT displays (2).
2. a kind of microcomputer-recognized intelligent universal meter according to claim 1, it is characterized in that, described micro computer module (1) intermediate range controlled relay group (102) is connected with micro-control module (101) respectively with microcontroller drive circuit (103).
3. a kind of microcomputer-recognized intelligent universal meter according to claim 1, is characterized in that, the test side in described break-make detection module (3) connects electric isolution coupler (302), signal generator (301) successively.
4. a kind of microcomputer-recognized intelligent universal meter according to claim 1, it is characterized in that, the battery charger (403) in described power module (4) is connected with lithium ion battery (402), DC/DC conversion module (401) successively.
5. a kind of microcomputer-recognized intelligent universal meter according to claim 1, it is characterized in that, interchange in described noncontact interchange, direct current detection module (5), DC current discrimination circuit (515) are connected with the first precise rectification circuit (514), the first low pass filter (513), the first gain amplifying circuit (512), an ADC module (511) successively, and interchange, DC current discrimination circuit (515) are also connected with the second gain amplifying circuit (522), the 2nd ADC module (521) successively.
6. a kind of microcomputer-recognized intelligent universal meter according to claim 1, it is characterized in that, interchange, the DC voltage discrimination circuit (605) of described noncontact interchange, DC voltage detection module (6) are connected with the 3rd precise rectification circuit (604), the 3rd low pass filter (603), the 3rd gain amplifying circuit (602), the 3rd ADC module (601) successively; Interchange, DC voltage discrimination circuit (605) are also directly connected with the 3rd low pass filter (603).
7. a kind of microcomputer-recognized intelligent universal meter according to claim 1, it is characterized in that, in described resistance, electric capacity, diode detection module (7), AC signal generator (703), the first contact condition testing circuit (701), the first automatic detection circuit (702) connect successively.
8. a kind of microcomputer-recognized intelligent universal meter according to claim 1, it is characterized in that, in described triode detection module (8), the second contact condition testing circuit (801), the second automatic detection circuit (802), measuring multiple parameters circuit (803) connect successively.
9. a kind of microcomputer-recognized intelligent universal meter according to claim 1, is characterized in that, the Sino-Philippines Neil lens (901) of described contactless temperature detection module (9) and I 2c temperature-measuring module (902) connects.
CN201420764582.6U 2014-12-08 2014-12-08 Microcomputer-recognized intelligent universal meter Expired - Fee Related CN204302347U (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN106019003A (en) * 2016-05-16 2016-10-12 中车青岛四方机车车辆股份有限公司 Multimeter embedded system, processing method based thereon and multimeter device
CN110456125A (en) * 2019-08-23 2019-11-15 深圳成智达科技有限公司 A kind of intelligent digital measuring system
CN112904084A (en) * 2019-11-19 2021-06-04 中车唐山机车车辆有限公司 Automatic testing device and automatic testing method for bogie impedance

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN106019003A (en) * 2016-05-16 2016-10-12 中车青岛四方机车车辆股份有限公司 Multimeter embedded system, processing method based thereon and multimeter device
CN106019003B (en) * 2016-05-16 2018-11-27 中车青岛四方机车车辆股份有限公司 Multimeter embedded system, the processing method based on the system and multimeter equipment
CN110456125A (en) * 2019-08-23 2019-11-15 深圳成智达科技有限公司 A kind of intelligent digital measuring system
CN110456125B (en) * 2019-08-23 2020-05-19 深圳成智达科技有限公司 Intelligent digital measuring system
CN112904084A (en) * 2019-11-19 2021-06-04 中车唐山机车车辆有限公司 Automatic testing device and automatic testing method for bogie impedance

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150429

Termination date: 20151208

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