CN207742325U - The calibration of direct current energy meter and test fixture - Google Patents
The calibration of direct current energy meter and test fixture Download PDFInfo
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- CN207742325U CN207742325U CN201721343032.7U CN201721343032U CN207742325U CN 207742325 U CN207742325 U CN 207742325U CN 201721343032 U CN201721343032 U CN 201721343032U CN 207742325 U CN207742325 U CN 207742325U
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- energy meter
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- current energy
- calibration
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Abstract
The utility model discloses a kind of calibration of direct current energy meter and test fixtures, including tooling carrier, voltage input-terminal and leading-out terminal, Master control chip, control auto-adjustment chip, resistance circuit, test result display circuit, impulsive quarantine circuit, control relay circuit, voltage comparator circuit integrating device are connect on tooling carrier and with voltage input-terminal, leading-out terminal, tested direct current energy meter.The calibration of the direct current energy meter of the utility model and test fixture, measuring accuracy for calibrating direct current energy meter, the tooling is with 15v direct currents, the resistance value accessed by ATT7037 chip controls parallel connections, to control the electric current of the electric energy meter of string in circuit, electric energy meter stabling current is flowed through to reach control, it is securely and reliably, convenient and simple.
Description
Technical field
The utility model is related to electric energy meter detection equipment technical fields, and in particular to a kind of calibration and survey of direct current energy meter
Trial work fills.
Background technology
In electric energy meter manufacturing enterprise, generally use tester is used for quickly detecting electric energy meter, confirms electric energy meter performance.
Technology about electrical energy meter calibration has very much, for example the Chinese utility model patent of Publication No. CN203930041U discloses one
The first calibration device of kind multifunctional electric energy meter, it has power management module, MCU storage controls, metering module, current/voltage hair
Generating apparatus measures display module and ammeter detection module, on-line communication module, supplemental functionality, system setup module,
Each device and module are connect by serial ports with MCU storage controls, are realized logical between MCU storage controls and each module
News；Ammeter detection module includes an interface, ammeter measuring device, the device that calibrates for error, selection device, buzzer, ammeter detection
The ammeter detection module is connected to MCU storage controls by the interface of module；On-line communication module includes an interface, communication inspection
Device is surveyed, the on-line communication module is connected to MCU storage controls by the interface of the on-line communication module；Miscellaneous function mould
Block includes an interface, temperature measuring equipment, RTC calibrating installations, and the interface of the supplemental functionality is by the miscellaneous function mould
Block is connected to MCU storage controls；System setup module includes an interface, CT test devices, and the interface of system setup module will
System setup module is connected to MCU storage controls, which not only may be implemented electric energy meter first revisal, but also electric energy may be implemented and boast of one's bit of contribution
It can detect, simplify electric energy meter production procedure, reduce personnel's process, increase detection reliability, improve production efficiency.
But with the continuous development of electronic technology, the function of electronic electric energy meter is maked rapid progress, and function is more and more multiple
Miscellaneous, electric energy meter measures the metering for direct current of marching toward from alternating current.And the direct current saltus step that traditional DC current generator generates
Greatly, and there is a problem of direct-current linear difference.So this brings very big design and batch to the calibration of DC meter
The bottleneck of generation.Limit the production of DC meter.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides calibration and the test fixture of a kind of direct current energy meter,
Measuring accuracy for calibrating direct current energy meter.The tooling is accessed with 15v direct currents by ATT7037 chip controls parallel connections
Resistance value flows through electric energy meter stabling current to control the electric current of the electric energy meter of string in circuit to reach control, securely and reliably,
It is convenient and simple.
To achieve the goals above, the utility model adopts the following technical solution.
A kind of calibration of direct current energy meter and test fixture, including tested direct current energy meter, tooling carrier, control source
Terminal and leading-out terminal；Master control chip, control auto-adjustment chip, resistance circuit, test are provided on the tooling carrier
As a result display circuit, impulsive quarantine circuit, control relay circuit and voltage comparator circuit.
Preferably, the Master control chip, control auto-adjustment chip, resistance circuit, test result display circuit, arteries and veins
Rush isolation circuit, control relay circuit, voltage comparator circuit integrating device on tooling carrier and with voltage input-terminal, defeated
Go out terminal, tested direct current energy meter connection.
In any of the above-described technical solution preferably, the Master control chip uses ATT7037AU chip ICs 5.
In any of the above-described technical solution preferably, the control auto-adjustment chip uses ATT7037AU chips
IC7。
In any of the above-described technical solution preferably, the resistance circuit includes multigroup resistor, passes through regulation resistance
Device size enters the size for the electric current for being tested direct current energy meter to control.
In any of the above-described technical solution preferably, the control relay circuit includes 8 pieces of magnetic latching relays.
In any of the above-described technical solution preferably, the ports PA, PB, P0 of the ATT7037AU chip ICs 5 respectively with
8 pieces of magnetic latching relays are connected.
In any of the above-described technical solution preferably, 8 pieces of magnetic latching relays of control relay circuit, every block of magnetic are protected
Relay is held respectively to be connected with multigroup resistor.
In any of the above-described technical solution preferably, the resistance circuit includes 1 Ohmic resistance of 8 10W, 8 50w
4 Ohmic resistances, 82 Ohmic resistances of 8 5w, 8 5w 820 Ohmic resistances.
In any of the above-described technical solution preferably, the impulsive quarantine circuit includes Pulse sampling device, photoelectric coupling
Device U1, photoelectrical coupler U2, photoelectrical coupler U3, photoelectrical coupler U4, photoelectrical coupler U1, photoelectrical coupler U2, photoelectricity
Coupler U3, photoelectrical coupler U4 are tested the pulse output terminal of direct current energy meter for insulation blocking.
In any of the above-described technical solution preferably, by photoelectrical coupler U1, photoelectrical coupler U2, photoelectrical coupler
The impulsive quarantine circuit that U3, photoelectrical coupler U4, Pulse sampling device connect and compose, one end connect with ATT7037AU chip ICs 7
It connects, the other end is connect with the pulse output terminal of tested direct current energy meter.
In any of the above-described technical solution preferably, the voltage comparator circuit includes REG chip ICs 2, op chip ICs 3
With field-effect tube Q5.
In any of the above-described technical solution preferably, the REG chip ICs 2 connect op chip ICs 3, the op chips
IC3 connection field-effect tube Q5；The op chip ICs 3 export stable 2.048v voltages, to control field-effect tube Q5, stablize output
Electric current.
In any of the above-described technical solution preferably, the ATT7037AU chip ICs 7 connect four relay compositions certainly
Dynamic test module, the test of the electric current for being automatically performed all generations.
In any of the above-described technical solution preferably, it is additionally provided with touch-switch sw1 on the tooling carrier and touches
Switch sw2, the touch-switch sw1 and touch-switch sw2 for testing the function switch with manual test automatically.
The technical solution of the utility model and is carried to solve the deficiency of testing reliability in the prior art and efficiency
A kind of the DC meter calibration and test fixture safe and reliable, simple and convenient, use scope is wide supplied.With common testing procedures phase
Than improving testing efficiency, having widened test range so that DC meter is calibrated in order to possible.
Compared with prior art, the above-mentioned technical proposal of the utility model has the advantages that：
（1）The technical solution of the utility model is applied to generation and the DC current of stable DC stream is required to send out
Raw device, especially all the time by the calibration and test of the electric energy meter of direct current metering.
（2）The calibration of the direct current energy meter of the utility model and test fixture, the metering essence for calibrating direct current energy meter
Degree, the tooling is with 15v direct currents, the resistance value accessed by ATT7037 chip controls parallel connections, to control the electricity of string in circuit
The electric current of energy table, flows through electric energy meter stabling current to reach control, securely and reliably, convenient and simple.
（3）The calibration of DC meter not only may be implemented in the calibration of the direct current energy meter of the utility model and test fixture
Function also achieves the measuring accuracy test of 2.5mA to 16A and a variety of tests for the metering related fields such as test of having good luck.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is to show according to the principle of a preferred embodiment of the calibration and test fixture of the direct current energy meter of the utility model
It is intended to；
Fig. 2 is the main control according to a preferred embodiment of the calibration and test fixture of the direct current energy meter of the utility model
Chip structure schematic diagram；
Fig. 3 be according to the utility model direct current energy meter calibration and test fixture a preferred embodiment control from
Dynamic calibration chip structure schematic diagram；
Fig. 4 is the relay according to a preferred embodiment of the calibration and test fixture of the direct current energy meter of the utility model
Control circuit controls the circuit connection schematic diagram of resistance circuit；
Fig. 5 is the test knot according to a preferred embodiment of the calibration and test fixture of the direct current energy meter of the utility model
Fruit display circuit structural schematic diagram；
Fig. 6 be according to the utility model direct current energy meter calibration and test fixture a preferred embodiment pulse every
Circuit connection schematic diagram from circuit and control relay circuit；
Fig. 7 is the adjusting electricity according to a preferred embodiment of the calibration and test fixture of the direct current energy meter of the utility model
The control relay circuit structural schematic diagram of resistance value；
Fig. 8 is the voltage ratio according to a preferred embodiment of the calibration and test fixture of the direct current energy meter of the utility model
Compared with electrical block diagram.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
For the measuring accuracy calibration problem for overcoming direct current energy meter existing in the prior art, the utility model is implemented
A kind of calibration of direct current energy meter of example proposition and test fixture.The tooling is with 15v direct currents, simultaneously by ATT7037 chip controls
Couple into resistance value flow through electric energy meter stabling current to control the electric current of string electric energy meter in circuit to reach control, pacify
It is complete reliable, it is convenient and simple.The calibration function of DC meter not only may be implemented in the tooling, also achieves the metering of 2.5mA to 16A
A variety of tests of accuracy test and the metering related fields such as test of having good luck.
Embodiment 1
The calibration of direct current energy meter described in the present embodiment includes tested direct current energy meter, tooling load with test fixture
Body, voltage input-terminal and leading-out terminal are provided with Master control chip, control auto-adjustment chip, resistance electricity on tooling carrier
Road, test result display circuit, impulsive quarantine circuit, control relay circuit and voltage comparator circuit.Described in the present embodiment
The calibration of direct current energy meter and test fixture, circuit structure is simple, using flexible, and realization principle is：It is controlled by field-effect tube
Resistance reaches control and generates stabling current.
The calibration of direct current energy meter described in the present embodiment and test fixture, as shown in Figure 1, Master control chip, control are certainly
Dynamic calibration chip, resistance circuit, test result display circuit, impulsive quarantine circuit, control relay circuit, voltage comparator circuit
Integrating device is connect on tooling carrier and with voltage input-terminal, leading-out terminal, tested direct current energy meter.
The calibration of direct current energy meter described in the present embodiment and test fixture, the Master control chip use ATT7037AU
Chip IC 5.Fig. 2 show the wiring construction figure of ATT7037AU chip ICs 5.
The calibration of direct current energy meter described in the present embodiment and test fixture, the control auto-adjustment chip use
ATT7037AU chip ICs 7.Fig. 3 show the wiring construction figure of ATT7037AU chip ICs 7.
The calibration of direct current energy meter described in the present embodiment and test fixture, the resistance circuit include multigroup resistor,
The size into the electric current for being tested direct current energy meter is controlled by regulating resistor size.
The calibration of direct current energy meter described in the present embodiment and test fixture, the control relay circuit include 8 blocks of magnetic
Guard relay.
The calibration of direct current energy meter described in the present embodiment and test fixture, PA, PB of the ATT7037AU chip ICs 5,
The ports P0 are connected with 8 pieces of magnetic latching relays respectively.
The calibration of direct current energy meter described in the present embodiment and test fixture, 8 blocks of magnetic of control relay circuit keep after
Electric appliance, every piece of magnetic latching relay are connected with multigroup resistor respectively.Fig. 4 show control relay circuit control resistance electricity
The wiring diagram on road.
The calibration of direct current energy meter described in the present embodiment and test fixture, the test result display circuit includes multigroup
Capacitance, multigroup same specification capacitor is in parallel, reduces internal resistance, makes electric current more smooth.Fig. 5 show connecing for test result display circuit
Line chart.
The calibration of direct current energy meter described in the present embodiment and test fixture, the resistance circuit include 1 Europe of 8 10W
820 Ohmic resistances of nurse resistance, 4 Ohmic resistances of 8 50w, 82 Ohmic resistances of 8 5w, 8 5w.
The calibration of direct current energy meter described in the present embodiment and test fixture, the ATT7037AU chip ICs 7 connect four
Relay forms automatic test module, the test of the electric current for being automatically performed all generations.
The calibration of direct current energy meter described in the present embodiment and test fixture, the impulsive quarantine circuit includes pulse collection
Device, photoelectrical coupler U1, photoelectrical coupler U2, photoelectrical coupler U3, photoelectrical coupler U4, wherein photoelectrical coupler U1, photoelectricity
Coupler U2, photoelectrical coupler U3, photoelectrical coupler U4 are tested the pulse output terminal of direct current energy meter for insulation blocking.
The arteries and veins connected and composed by photoelectrical coupler U1, photoelectrical coupler U2, photoelectrical coupler U3, photoelectrical coupler U4, Pulse sampling device
Isolation circuit is rushed, one end is connect with ATT7037AU chip ICs 7, and the pulse of the other end and tested direct current energy meter exports
Terminal connects.Fig. 6 show the wiring diagram of impulsive quarantine circuit and control relay circuit.
The calibration of direct current energy meter described in the present embodiment and test fixture, the voltage comparator circuit include REG chips
IC2, op chip IC 3 and field-effect tube Q5.REG chip ICs 2 connect op chip ICs 3, and the op chip ICs 3 connect field-effect tube
Q5；The op chip ICs 3 export stable 2.048v voltages, to control field-effect tube Q5, stablize output current.Fig. 8 is shown
The wiring diagram of voltage comparator circuit.
The calibration of direct current energy meter described in the present embodiment and test fixture access the direct current of 15V in voltage input-terminal
Operating voltage is connected on the current sample copper piece of tested direct current energy meter in leading-out terminal, and Pulse sampling device is connected on respectively
On tested direct current energy meter pulse output terminal, and to voltage on tested direct current energy meter.It just can be controlled by key switch
System achievees the purpose that calibrate electric energy meter and tests electric energy meter by the size of current of electric energy meter with this.Specifically, such as Fig. 1 to Fig. 8
It is shown：The port PA, PB, P0 of the ATT7037AU chip ICs 5 of the tooling is connected with 8 pieces of magnetic latching relays respectively, then every piece
Relay is connected with multigroup resistance respectively.8 groups of resistance are respectively 1 Ohmic resistance of 8 10W, 4 Ohmic resistances of 8 50w, 8
The 820 Ohmic resistances composition of 82 Ohmic resistances of a 5w, 8 5w, difference can generate about 16A, 4A and 2A and 1A and 0.5A, 0.2A
With 0.1A and 50MA and 25MA, 20MA and 10MA and 5MA and 2.5MA electric currents.The ATT7037AU chip ICs 7 of the tooling and four
Relay relay14, relay15, relay16, relay17 forms automatic test module, and can be automatically performed all can produce
The test of raw electric current.Touch-switch sw1 and the automatic test of touch-switch sw2 compositions and manual test handoff functionality, facilitate survey
Examination improves testing efficiency.The tooling is tested the pulse of direct current energy meter by photoelectrical coupler U1, U2, U3, U4 insulation blocking
Terminal；One end that photoelectrical coupler U1, U2, U3, U4 constitutes circuit connect with aat7037 chips ic7, the other end be tested directly
Flow the pulse output terminal connection of electric energy meter.The chip IC 3 of the tooling exports stable 2.048v voltages, is used for comparator chip
IC3 controls field-effect tube Q5, achievees the purpose that stable output current with this.
The calibration of direct current energy meter described in the present embodiment and test fixture are big by adjusting the resistance of series connection in the line
It is small, reach the problem for eliminating direct-current linear difference；It is controlled again by comparing the difference of voltage and 2.048v in device comparison circuit
Concatenated field-effect tube resistance value is made, stable current value is obtained with this.
Embodiment 2
The calibration of direct current energy meter as described in embodiment 1 and attached drawing 1 to 8 and test fixture, on the tooling carrier also
Be provided with touch-switch sw1 and touch-switch sw2, the touch-switch sw1 and touch-switch sw2 for test automatically with manually
The function switch of test.
Above-described specific implementation mode, to the purpose of this utility model, technical solution and advantageous effect carried out into
One step is described in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced
It changes, improve, should be included within the scope of protection of this utility model.
Claims (14)
1. calibration and the test fixture of a kind of direct current energy meter, including tested direct current energy meter, tooling carrier, voltage input end
Son and leading-out terminal, it is characterised in that：Master control chip, control auto-adjustment chip, resistance are provided on the tooling carrier
Circuit, test result display circuit, impulsive quarantine circuit, control relay circuit and voltage comparator circuit, the master control coremaking
Piece, control auto-adjustment chip, resistance circuit, test result display circuit, impulsive quarantine circuit, control relay circuit, electricity
Pressure comparison circuit integrating device is connect on tooling carrier and with voltage input-terminal, leading-out terminal, tested direct current energy meter.
2. calibration and the test fixture of direct current energy meter as described in claim 1, it is characterised in that：The Master control chip is adopted
With ATT7037AU chip ICs 5.
3. calibration and the test fixture of direct current energy meter as described in claim 1, it is characterised in that：The control auto-adjustment
Chip uses ATT7037AU chip ICs 7.
4. calibration and the test fixture of direct current energy meter as described in claim 1, it is characterised in that：The resistance circuit includes
Multigroup resistor controls the size into the electric current for being tested direct current energy meter by regulating resistor size.
5. calibration and the test fixture of direct current energy meter as described in claim 1, it is characterised in that：The relay control electricity
Road includes 8 pieces of magnetic latching relays.
6. calibration and the test fixture of direct current energy meter as claimed in claim 2, it is characterised in that：The ATT7037AU cores
The port PA, PB, P0 of piece IC5 is connected with 8 pieces of magnetic latching relays respectively.
7. calibration and the test fixture of direct current energy meter as claimed in claim 5, it is characterised in that：Control relay circuit
8 pieces of magnetic latching relays, every piece of magnetic latching relay are connected with multigroup resistor respectively.
8. calibration and the test fixture of direct current energy meter as described in claim 1 or 4, it is characterised in that：The resistance circuit
820 Ohmic resistances of 1 Ohmic resistance including 8 10W, 4 Ohmic resistances of 8 50w, 82 Ohmic resistances of 8 5w, 8 5w.
9. calibration and the test fixture of direct current energy meter as described in claim 1, it is characterised in that：The impulsive quarantine circuit
Including Pulse sampling device, photoelectrical coupler U1, photoelectrical coupler U2, photoelectrical coupler U3, photoelectrical coupler U4, photoelectric coupling
Device U1, photoelectrical coupler U2, photoelectrical coupler U3, photoelectrical coupler U4 are tested the pulse of direct current energy meter for insulation blocking
Leading-out terminal.
10. calibration and the test fixture of direct current energy meter as claimed in claim 9, it is characterised in that：By photoelectrical coupler U1,
The impulsive quarantine circuit that photoelectrical coupler U2, photoelectrical coupler U3, photoelectrical coupler U4, Pulse sampling device connect and compose, one
End is connect with ATT7037AU chip ICs 7, and the other end is connect with the pulse output terminal of tested direct current energy meter.
11. calibration and the test fixture of direct current energy meter as described in claim 1, it is characterised in that：The voltage is more electric
Road includes REG chip ICs 2, op chip ICs 3 and field-effect tube Q5.
12. calibration and the test fixture of direct current energy meter as claimed in claim 11, it is characterised in that：The REG chip ICs 2
Op chip ICs 3 are connected, the op chip ICs 3 connect field-effect tube Q5；The op chip ICs 3 export stable 2.048v voltages,
To control field-effect tube Q5, stablize output current.
13. calibration and the test fixture of direct current energy meter as claimed in claim 3, it is characterised in that：The ATT7037AU cores
Four relays of piece IC7 connections form automatic test module, the test of the electric current for being automatically performed all generations.
14. calibration and the test fixture of direct current energy meter as described in claim 1, it is characterised in that：On the tooling carrier
Touch-switch sw1 and touch-switch sw2, the touch-switch sw1 and touch-switch sw2 are additionally provided with for test and hand automatically
The function switch of dynamic test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721343032.7U CN207742325U (en) | 2017-10-18 | 2017-10-18 | The calibration of direct current energy meter and test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721343032.7U CN207742325U (en) | 2017-10-18 | 2017-10-18 | The calibration of direct current energy meter and test fixture |
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| Publication Number | Publication Date |
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| CN207742325U true CN207742325U (en) | 2018-08-17 |
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ID=63115163
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325321A (en) * | 2021-12-28 | 2022-04-12 | 保定飞凌嵌入式技术有限公司 | Embedded board card set testing tool and method based on power integration |
-
2017
- 2017-10-18 CN CN201721343032.7U patent/CN207742325U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325321A (en) * | 2021-12-28 | 2022-04-12 | 保定飞凌嵌入式技术有限公司 | Embedded board card set testing tool and method based on power integration |
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