CN201489049U - Digital alternating voltage-current combination meter - Google Patents
Digital alternating voltage-current combination meter Download PDFInfo
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- CN201489049U CN201489049U CN2009200662247U CN200920066224U CN201489049U CN 201489049 U CN201489049 U CN 201489049U CN 2009200662247 U CN2009200662247 U CN 2009200662247U CN 200920066224 U CN200920066224 U CN 200920066224U CN 201489049 U CN201489049 U CN 201489049U
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- combination table
- combination
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Abstract
The utility model discloses a digital alternating voltage-current combination meter, comprising a housing (9), a circular combined scale dial (5), over-voltage and over-current indication light emitting diodes (8, 16), a special control chip PLX 500 (21), and the like; the digital alternating voltage-current combination meter is characterized in that the housing is convex upwards; the dial (5) is embedded into the top of the housing; the combined dial (5) comprises an alternating voltage scale meter (10) and an alternating current scale meter (7); and a double-shaft step motor controlled by the PLX 500 (21) simultaneously drives a pointer (15) of the alternating voltage scale meter and a pointer (6) of the alternating current scale meter in the center of the dial (5) so as to indicate the measurement value on the respective scale dial. The digital alternating voltage-current combination meter has the advantages of long service life, high measuring precision, convenient installation, and the like, and is mainly applied to the fields with high demand for electricity quality and electricity security such as alternating voltage and current measurement of energy management system for nuclear power, solar energy and wind energy.
Description
Technical field
The utility model relates to a kind of digital AC electric current and voltage combination table, be mainly used in the occasion that electric power quality and electric power safety are had higher requirements, and robotization control needed the occasion of high reliability, comprise the alternating voltage and electric current demonstration of energy management system, automatic production line, sub-district power monitoring, intelligent building, switch cubicle electric control cabinet and the switchboard of nuclear power, sun power, wind-powered electricity generation, thermoelectricity and water power.
Background technology
The measurement of traditional industrial-frequency alternating current mainly is A.C. voltmeter and the alternating current ammeter that utilizes the electromagnetic type principle to make, this class instrument utilizes current-carrying coil that effect and two current-carrying coils interactions of iron plate are produced the ampere moment that drives, the volute springs such as hairspring that are used for damping simultaneously in the current-carrying coil can produce one with coil deflection and hinder the torsional moment that coil rotates, therefore the size by coil current has determined the twisting resistance that point gear is suffered and then has promoted the size of its deflection angle, and this is a kind of typical analog measurement method.Although the angle that point gear rotates and the number of turn of coil, flow through between the coefficient of torsion of electric current, magnetic induction density, area coil and spring of coil and have certain linear, but be subjected to the influence of temperature, humidity, material, manufacturing process, cause error bigger, measuring accuracy is limited.
On the other hand, the measurement that surpasses range also can make the serious deflection of gauge outfit, even torsional deformation, and fragile parts such as hairspring damage especially easily, and reliability is not high.
Traditional A.C. voltmeter and alternating current ammeter are independent mounting structure, and be panel mounting structure, to measure alternating voltage and alternating current simultaneously and then A.C. voltmeter and alternating current ammeter must be installed simultaneously, so both be unfavorable for having the consumer of installation dimension restriction, also be unfavorable for aggregate erection with other electrical appliance module.
Summary of the invention
For addressing the above problem, the utility model provides a kind of alternating voltage currents combination table that adopts digital measuring technique to realize, the distinguishing feature of this instrument is, changed the traditional electromagnetic type measuring principle and the manufacturing technology of push pointer deflection, analogue measurement has been become digital measurement and the method by a micro-step motor push pointer but adopted.Specifically, an alternating voltage digital calibration and an alternating current digital calibration have been comprised on the scale dial plate of a circle simultaneously, thereby the measurement of alternating voltage and the measurement of alternating current are combined, after industrial frequency AC electric signal to be measured is handled through digitized conditioning, deliver to special-purpose control chip, the micro-step motor of a double driving shafts of control rotates, its two output shafts drive an alternating voltage list index and an alternating current list index respectively, each pointer is the current voltage and current measured value of indication on alternating voltage digital calibration dish and alternating current digital calibration dish respectively, under the prerequisite that satisfies people's observation habit, accomplish that really a table is dual-purpose.Because driving, gauge pointer adopted micro-step motor, gauge internal does not have easily worn parts such as hairspring, measuring-signal is handled through quantifications such as digital filterings, therefore measuring accuracy height, long, good reliability of life-span, the application of the nuclear power that is particularly suitable for having relatively high expectations, sun power, wind-powered electricity generation, thermoelectricity and water power equal energy source management system is fit to penetration and promotion.
The concrete technical scheme that the utility model proposes is as follows:
A kind of digital AC electric current and voltage combination table, comprise combination table housing (9), combination scale dial plate (5), two light emitting diodes (8) (16), core controller PLX500 parts such as (21), combination scale dial plate (5) is positioned at the central authorities of combination table housing (9), and two graduation apparatus (7) and (10) are arranged respectively on the combination scale dial plate (5).
Combination table housing (9) is an epirelief shape in appearance, embeds the combination scale dial plate (5) of a circle on the top stage of center projections.
Perpendicular diameter with limbus dial plate (5) is the separatrix, two semi-circular portions about scale dial plate (5) is divided into, it on the left semicircle alternating voltage digital calibration table (10), sign has the V symbol, it on the right semi-circle alternating current digital calibration table (7), sign has the A symbol, and all reticules on graduation apparatus (10) and the graduation apparatus (7) all are uniform.
There are an alternating voltage list index (15) and an alternating current list index (6) in the center that is positioned at combination scale dial plate (5), pointer (15) and pointer (6) have the common center of circle, the stepper motor that drives pointer (6) and (15) rotation is an a concentric double driving shafts micro-step motor (22), comprise axle (23) and outer shaft (24) in, axle (23) drives alternating voltage list index (15) wherein, and outer shaft (24) drives alternating current list index (6).
The micro-step motor (22) of double driving shafts is controlled by special integrated circuit PLX500 (21) with one heart.
On combination table housing (9), there is an overvoltage indication light emitting diode (8) in the lower right corner that there is an overcurrent indication light emitting diode (16) in the upper left corner that is positioned at combination scale dial plate (5), be positioned at combination scale dial plate (5).
The wiring hole of ac voltage measurement is positioned at the front end of combination table housing (9), and a screw-tightened terminal (11) that links to each other with wiring hole (1) and a screw-tightened terminal (12) that links to each other with wiring hole (2) are arranged respectively.
The wiring hole of ac current measurement is positioned at the rear end of combination table housing (9), and a screw-tightened terminal (13) that links to each other with wiring hole (3) and a screw-tightened terminal (14) that links to each other with wiring hole (4) are arranged respectively.
There are four expansion combination connecting holes (17), (18), (19) and (20) in the side of combination table housing (9).
Description of drawings
Fig. 1 is the outside drawing of the left front side-looking of the utility model;
Fig. 2 is the outside drawing that the utility model right side is looked;
Fig. 3 is the utility model front elevation;
Fig. 4 is the utility model front view;
Fig. 5 is the utility model rear view;
Fig. 6 is the scale dial plate figure behind the utility model expanded range;
Fig. 7 is the outside drawing after the utility model is changed expanded range dial plate panel;
Fig. 8 is the utility model electricity theory diagram.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
The utility model comprises: measure alternating voltage wiring hole (1) (2), the screw-tightened terminal (11) that links to each other with wiring hole (1), the screw-tightened terminal (12) that links to each other with wiring hole (2), measure alternating current wiring hole (3) (4), the screw-tightened terminal (13) that links to each other with wiring hole (3), the screw-tightened terminal (14) that links to each other with wiring hole (4), combination scale dial plate (5), alternating current list index (6), alternating current digital calibration table (7), overvoltage indication light emitting diode (8), combination table housing (9), alternating voltage digital calibration table (10), alternating voltage list index (15), overcurrent indication light emitting diode (16), four expansion combination bore (17) (18) (19) (20) of combination table housing (9) side, special integrated circuit PLX500 (21), concentric double driving shafts stepper motor (22), interior axle (23) and the outer shaft (24) of double driving shafts stepper motor.
Combination table housing of the present utility model (9) adopts the engineering plastics manufacturing, it on the one-piece construction modular form, four expansion combination connecting holes (17) (18) (19) (20) of its housing side are convenient to integrate with other electric equipments such as air switch and leakage switch, adapt to the different assembly of its electric equipment, the appearance shape of its epirelief can highlight the combination table scale dial plate (5) that the top embeds, and instrument integral layout compactness is generous.
Alternating current digital calibration table (7) and alternating voltage digital calibration table (10) have been comprised on the combination scale dial plate (5), its arrangement regulation is as follows, circular scale dial plate (5) is the separatrix with vertical diameter, two parts about scale dial plate (5) is divided into, wherein be alternating voltage digital calibration table (10) on the left semicircle, sign has the V symbol, is alternating current digital calibration table (7) on the right semi-circle, sign has the A symbol, and all reticules on graduation apparatus (10) and (7) all are even distributions.Two pointers (6) (15) have been arranged at the center of combination scale dial plate (5), its alternating voltage list index (15) is limited in the meter full scale intrinsic deflection of alternating voltage graduation apparatus (10), alternating current list index (6) is limited in the meter full scale intrinsic deflection of alternating current graduation apparatus (7), so alternating voltage and two physical quantitys of electric current can obtain indication and clearly distinguished in same dial plate (5).
The stepper motor that drives pointer (6) and (15) rotation is a concentric double driving shafts micro-step motor (22), comprise axle (23) and outer shaft (24) in, axle (23) drives alternating voltage list index (15) wherein, and outer shaft (24) drives alternating current list index (6).
Compare with alternating current ammeter with the electromagnetic AC voltage table, the utility model has adopted a kind of designing technique of flexibility, the main application of this technology is the expansion that makes things convenient for the instrument measurement range, as long as change the scale dial plate (5) of different ranges and the program of special integrated circuit PLX500 (21), can derive the combination table of different ranges, it is supporting to be convenient to product line.The utility model has provided this example, and the scale dial plate of Fig. 1～5 combination table is, each reticule of alternating voltage is 10V, and range ability is 0～500V; Each reticule of alternating current is 1A, and range ability is 0～50A.Fig. 6 is the scale dial plate figure behind a expanded range of the utility model design, each reticule of its alternating voltage is 20V, range is 0～1000V, each reticule of alternating current is 2A, range is 0～100A, and Fig. 7 is the combination table outside drawing of the utility model according to scale dial plate (5) formation of Fig. 6.
On the housing (9) of combination table, an overcurrent indication light emitting diode (16) is positioned at the position, the upper left corner of combination scale dial plate (5), if the ac current signal of input has surpassed the range ability of predetermined electric current table, alternating current list index (6) then refers to the maximum scale place at reometer, but overcurrent indication light emitting diode (16) is with flash for prompting.
On the housing (9) of combination table, an overvoltage indication light emitting diode (8) is positioned at the position, the lower right corner of combination scale dial plate (5), if the ac voltage signal of input has surpassed the range ability of the voltage table of regulation, alternating voltage list index (15) then refers to the maximum scale place at voltage table, but overvoltage indication light emitting diode (8) is with flash for prompting.
Fig. 8 is an electrical schematic diagram of the present utility model, among the figure, special integrated circuit PLX500 (21) is the kernel control chip of combination table, ac voltage signal and the ac current signal of importing by wiring hole (3) (4) by wiring hole (1) (2) input, pass through signal conditioning circuit separately respectively, after range automaticallyes switch, deliver to PLX500 and carry out sampling processing, then PLX500 with the sampling data after digital filtering and quantities conversion, convert angular displacement to, promote inside and outside two driving shafts rotation of twin shaft micro-step motor (21), drive pointer (6) and (15) respectively, the position that pointer rests on the graduation apparatus separately is the current electric current that records, magnitude of voltage.
The utility model both can use as A.C. voltmeter separately, also can make alternating current ammeter separately and use, and can also make the usefulness of A.C. voltmeter and alternating current ammeter simultaneously.Its compact appearance, easy for installation, life-span length, good reliability, measuring accuracy height, the occasion of higher reliability requirement be can be widely used in electric power quality and electric power safety are had, the alternating voltage of energy management system of nuclear power, sun power, wind-powered electricity generation, thermoelectricity and water power and the measurement of alternating current comprised.
Claims (9)
1. digital AC electric current and voltage combination table, comprise combination table housing (9), combination scale dial plate (5), two light emitting diodes (8) (16), core controller PLX500 parts such as (21), it is characterized in that, combination scale dial plate (5) is positioned at the central authorities of combination table housing (9), and two graduation apparatus (7) and (10) are arranged respectively on the combination scale dial plate (5).
2. digital AC electric current and voltage combination table according to claim 1 is characterized in that combination table housing (9) is an epirelief shape in appearance, embeds the combination scale dial plate (5) of a circle on the top stage of center projections.
3. digital AC electric current and voltage combination table according to claim 1 and 2, it is characterized in that, circular scale dial plate (5) is the separatrix with vertical diameter, two semi-circular portions about scale dial plate (5) is divided into, be alternating voltage digital calibration table (10) on the left semicircle, sign has the V symbol, is alternating current digital calibration table (7) on the right semi-circle, sign has the A symbol, and graduation apparatus (10) is even with the reticule of (7).
4. according to claim 1 or 3 described digital AC electric current and voltage combination table, it is characterized in that, there are an alternating voltage list index (15) and an alternating current list index (6) in the center that is positioned at combination scale dial plate (5), pointer (15) and pointer (6) have the common center of circle, the stepper motor that drives pointer (6) and (15) rotation is an a concentric double driving shafts micro-step motor (22), comprise axle (23) and outer shaft (24) in, axle (23) drives alternating voltage list index (15) wherein, and outer shaft (24) drives alternating current list index (6).
5. according to claim 1 or 4 described digital AC electric current and voltage combination table, it is characterized in that the micro-step motor (22) of double driving shafts is controlled by special integrated circuit PLX500 (21) with one heart.
6. digital AC electric current and voltage combination table according to claim 1, it is characterized in that, on combination table housing (9), there is an overvoltage indication light emitting diode (8) in the lower right corner that there is an overcurrent indication light emitting diode (16) in the upper left corner that is positioned at combination scale dial plate (5), be positioned at combination scale dial plate (5).
7. digital AC electric current and voltage combination table according to claim 1, it is characterized in that, the wiring hole of ac voltage measurement is positioned at the front end of combination table housing (9), and a screw-tightened terminal (11) that links to each other with wiring hole (1) and a screw-tightened terminal (12) that links to each other with wiring hole (2) are arranged respectively.
8. digital AC electric current and voltage combination table according to claim 1, it is characterized in that, the wiring hole of ac current measurement is positioned at the rear end of combination table housing (9), and a screw-tightened terminal (13) that links to each other with wiring hole (3) and a screw-tightened terminal (14) that links to each other with wiring hole (4) are arranged respectively.
9. digital AC electric current and voltage combination table according to claim 1 is characterized in that, there are four expansion combination connecting holes (17), (18), (19) and (20) in the side of combination table housing (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200662247U CN201489049U (en) | 2009-10-12 | 2009-10-12 | Digital alternating voltage-current combination meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200662247U CN201489049U (en) | 2009-10-12 | 2009-10-12 | Digital alternating voltage-current combination meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201489049U true CN201489049U (en) | 2010-05-26 |
Family
ID=42427922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200662247U Expired - Fee Related CN201489049U (en) | 2009-10-12 | 2009-10-12 | Digital alternating voltage-current combination meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201489049U (en) |
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2009
- 2009-10-12 CN CN2009200662247U patent/CN201489049U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20121012 |