CN114062999A - Auxiliary device for calibrating ammeter - Google Patents

Abstract

The invention discloses an auxiliary device for calibrating an ammeter, which relates to the technical field of a pincer-shaped ammeter and comprises a base plate, wherein handles are arranged at two ends of the base plate, a right-angle table is arranged in the middle of the upper end surface of the base plate, an ammeter fixing mechanism is arranged at the upper end of the right-angle table, a related circuit assembly for calibrating the ammeter is arranged on one side of the upper end surface of the base plate, a lead supporting mechanism for supporting a lead of a related circuit part is arranged on the side surface of the right-angle table, and the related circuit assembly comprises a power supply, a knife switch piece, a resistor and a plurality of connecting leads. According to the invention, the related circuit component for calibrating the ammeter is arranged on the base plate, the ammeter fixing mechanism for fixing the clamp-on ammeter is arranged on the right-angle table, the related circuit component is connected during calibration, the clamp end of the clamp-on ammeter is sleeved on the connecting lead, and the calibration operation is carried out after the current detected by the ammeter is compared with the output current of the power supply.

Description

Auxiliary device for calibrating ammeter

Technical Field

The invention belongs to the technical field of clamp-on ammeters, and particularly relates to an auxiliary device for calibrating an ammeter.

Background

The clamp ammeter is one of the ammeters and is used for measuring the current value in a circuit, which is called a current clamp for short. In electrical and electronic engineering, a current clamp (or current probe) is a clamp-type probe having two openable ends for clamping an electrical conductor around an electrical device, and the probe is used for measuring properties of the current on the conductor without making contact with a conductive part of the device, i.e. without disconnecting a wire of the device for probe insertion.

The existing clamp-on ammeter needs to be provided with a plurality of circuits during calibration, and devices in the circuits, a measured lead and the clamp-on ammeter are not fixed, so that the current value measured by the clamp-on ammeter has errors, the operation is troublesome, and the calibration accuracy of the ammeter is influenced; meanwhile, the existing calibration device cannot know the change relation between the detection current of the clamp-on ammeter and the angle of the detection lead penetrating through the clamp end, and therefore an auxiliary device for calibrating the ammeter is provided.

Disclosure of Invention

The invention aims to provide an auxiliary device for calibrating an ammeter, aiming at the problem that the conventional auxiliary device for calibrating the ammeter influences the calibration accuracy of the ammeter.

The invention is realized by the following technical scheme: the utility model provides an auxiliary device that calibration ampere meter was used, includes the bed plate, the both ends of bed plate are equipped with the handle, be equipped with the right angle platform in the middle of the up end of bed plate, the upper end of right angle platform is equipped with ampere meter fixed establishment, up end one side of bed plate is equipped with the relevant circuit subassembly that is used for calibrating the ampere meter, be equipped with the wire supporting mechanism who supports relevant circuit part wire on the side of right angle platform.

The related circuit components comprise a power supply, a knife switch element, a resistor element and a plurality of connecting wires, wherein the power supply, the knife switch element and the resistor element are all arranged on the base plate, and the power supply is connected with the knife switch element and the resistor element into a closed loop through the plurality of connecting wires; the resistance member comprises a plurality of resistors with fixed resistance values.

Preferably, wire supporting mechanism is including setting up the rotating assembly on right angle platform side, rotating assembly's upper end and lower extreme are connected with the bracing piece respectively, two the tip of connecting rod all is connected with the horizontal pole through fixed cover, the tip of horizontal pole is equipped with the mechanism of holding with that is used for fixed connecting wire that is surveyed.

Preferably, it includes fixed plate and splint to add the mechanism of holding, the one end fixed connection of fixed plate is at the tip of horizontal pole, splint set up the one side at the fixed plate, it is protruding all to be equipped with the connection on the opposite face of fixed plate and splint, the connection on fixed plate and the splint is protruding to rotate through the pivot and is connected, just be equipped with torsion spring in the pivot.

Preferably, the middle of one side that the fixed plate is close to splint is equipped with the arc wall, the middle part of splint is outside bellied arc form, and the opposite face of fixed plate and splint all makes insulating processing, and the convenience is got connecting wire's clamp.

Preferably, rotating assembly includes rotatory shell, rotatory shell is columniform hollow structure, one side of rotatory shell is equipped with the connecting axle, the one end fixed connection of connecting axle is on the side of right angle platform, the connecting axle is located rotatory shell one end and is connected with left chuck, rotatory shell rotates the cover and establishes the left chuck end at the connecting axle, the junction department that rotatory shell is located the connecting axle is equipped with the right chuck that matches with left chuck, all be equipped with the tooth's socket on the opposite face of left side chuck and right chuck, be equipped with the spring in the inside cavity of rotatory shell, the inner wall of left chuck and rotatory shell is withstood respectively at the both ends of spring.

Preferably, the outer side wall of the rotary shell is provided with a rotary button, so that a user can rotate the rotary shell conveniently.

Preferably, an angle measurer for measuring the rotation angle of the supporting rod is further arranged on the side face of the right-angle table, the angle measurer is arc-shaped, angle scale marks are arranged on the outer surface of the angle measurer, an angle indicating needle is arranged on the rotating shell, and the direction of the indicating needle is parallel to the direction of the supporting rod.

Preferably, be equipped with the laser lamp on the upper end bracing piece of rotatory shell, the laser lamp is under operating condition, and on the scale mark of light irradiation on the angle scale mark, the rotatory angle of measurement bracing piece that can be accurate.

Preferably, the laser lamp is an LED laser infrared lamp.

Preferably, ampere meter fixed establishment includes loading board and slider, the up end of right angle platform is equipped with the spout, slider sliding connection is in the spout, the both ends of slider are equipped with fixed ear, fixed ear passes through the set screw and fixes the slider in the spout, the lower extreme of loading board and the upper end fixed connection of slider, the up end both sides of loading board are equipped with the elasticity curb plate, the elasticity curb plate is the U-shaped of invering, a lateral wall and the loading board of elasticity curb plate are connected, and another lateral wall of elasticity curb plate is unsettled, and during the use, will clamp on the ammeter card and go into between two elastic plates, and the hanging empty wall through two elastic plates will clamp on the ammeter tightly.

Compared with the prior art, the invention has the following advantages:

1. according to the invention, the related circuit component for calibrating the ammeter is arranged on the base plate, the ammeter fixing mechanism for fixing the clamp-type ammeter is arranged on the right-angle table, the related circuit component is connected during calibration, the clamp end of the clamp-type ammeter is sleeved on the connecting lead, and the calibration operation is carried out after the current detected by the ammeter is compared with the output current of the power supply.

2. The invention changes the current value on the connecting wire by connecting a plurality of resistors in series, and repeatedly calibrates for a plurality of times, thereby increasing the calibration accuracy of the clip-on ammeter.

3. According to the invention, the wire supporting mechanism capable of rotating the angle is arranged on the side surface of the right-angle plate, and the ammeter fixing mechanism capable of transversely arranging one end is arranged at the upper end of the right-angle platform, so that the angle between the detection wire and the clamp ammeter can be changed during calibration, the angle relation between the detection current of the clamp ammeter and the detection wire can be known, and the clamp ammeter can be conveniently and correctly used.

4. According to the invention, the left chuck and the right chuck are separated by pressing the rotary shell, then the rotary button is rotated, the rotary shell drives the upper support rod and the lower support rod to rotate, then the pressed rotary shell is loosened, the left chuck and the right chuck are clamped again under the action of the spring, the rotary shell is fixed, the purpose of changing the angle of the connecting wire is achieved, and the stability of the support rod is strong.

5. According to the invention, the angle measurer is arranged on the side surface of the right-angle table, and the scales on the angle measurer are indicated through the indicating needle and the laser lamp, so that the rotating angle of the connecting lead can be clearly and accurately observed.

Drawings

FIG. 1 is a schematic diagram of an auxiliary device for calibrating an ammeter;

FIG. 2 is a schematic structural diagram of an auxiliary device for calibrating an ammeter in an operating state;

FIG. 3 is a schematic diagram of a wire support mechanism of an auxiliary device for calibrating an ammeter;

FIG. 4 is an enlarged schematic view of A in FIG. 3;

FIG. 5 is a schematic diagram of a rotary assembly of an auxiliary device for calibrating a current meter;

fig. 6 is a schematic structural diagram of an ammeter fixing mechanism in an auxiliary device for calibrating an ammeter.

Reference numbers in the figures: 1. a base plate; 2. a handle; 3. a right angle table; 4. an ammeter fixing mechanism; 41. a carrier plate; 42. an elastic side plate; 43. a slider; 44. fixing screws; 5. a chute; 6. a wire support mechanism; 61. a rotating assembly; 611. rotating the housing; 612. a rotation knob; 613. a left chuck; 614. a connecting shaft; 615. a right chuck; 616. a spring; 62. a support bar; 63. fixing a sleeve; 64. a cross bar; 65. a clamping mechanism; 651. a fixing plate; 652. a splint; 653. a connecting projection; 654. a rotating shaft; 66. an indicator needle; 67. a laser light; 7. a knife switch element; 8. a power source; 9. a resistance member; 10. an angle measurer; 11. a clamp-on ammeter; 12. and connecting the lead.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-4, an auxiliary device for calibrating an ammeter comprises abase plate 1, handles 2 are arranged at two ends of thebase plate 1, a right-angle table 3 is arranged in the middle of the upper end surface of thebase plate 1, anammeter fixing mechanism 4 is arranged at the upper end of the right-angle table 3, a related circuit component for calibrating the ammeter is arranged on one side of the upper end surface of thebase plate 1, and alead supporting mechanism 6 for supporting leads of a related circuit part is arranged on the side surface of the right-angle table 3; the related circuit components comprise apower supply 8, a knife switch element 7, aresistance element 9 and a plurality of connecting wires 12, wherein thepower supply 8, the knife switch element 7 and theresistance element 9 are all arranged on thebase plate 1, and thepower supply 8 is connected with the knife switch element 7 and theresistance element 9 through the plurality of connecting wires 12 to form a closed loop; theresistive member 9 comprises a plurality of resistors of fixed resistance.

When in use, the known voltage value is set to be U₀And a known resistance value R₀Theresistor 9 is connected with the knife switch 7 in series through a connecting lead 12, part of the connecting lead 12 is vertically supported by alead supporting mechanism 6, theclamp ammeter 11 is fixed on anammeter fixing mechanism 4 of the right-angle table 3, so that a clamp end of theclamp ammeter 11 is vertically sleeved on the outer side of the connecting lead 12, and theclamp ammeter 11 measures a current value I on the connecting lead 12;

the current on the connecting lead can be calculated by ohm's law: i is₀＝U₀/R₀；

Then the current values I and I detected by theclamp ammeter 11 are measured₀Comparing to calibrate theclamp ammeter 11; because the subassembly and the clip-onammeter 11 with relevant circuit all fix on thebed plate 1, only need take out the whole ofbed plate 1 during the use, with its circuit switch-on, fix connecting wire 12 to the bracing piece on, alright detect the calibration for convenient operation, and the accuracy is high when 11 calibrations of clip-on ammeter.

Wire supporting mechanism 6 is including setting up rotatingassembly 61 onright angle platform 3 side, and the upper end and the lower extreme of rotatingassembly 61 are connected with bracingpiece 62 respectively, and the tip of two connecting rods all is connected withhorizontal pole 64 through fixedcover 63, and the tip ofhorizontal pole 64 is equipped withfixture 65 that is used for fixed connecting wire 12 that is surveyed.

Theclamping mechanism 65 comprises a fixingplate 651 and aclamping plate 652, one end of the fixingplate 651 is fixedly connected to the end of thecross bar 64, the clampingplate 652 is arranged on one side of the fixingplate 651, a connectingprotrusion 653 is arranged on each of the opposite surfaces of the fixingplate 651 and theclamping plate 652, the connectingprotrusions 653 on the fixingplate 651 and theclamping plate 652 are rotatably connected through arotating shaft 654, and atorsion spring 616 is arranged on therotating shaft 654.

An arc-shaped groove is formed in the middle of one side, close to theclamping plate 652, of the fixingplate 651, the middle of theclamping plate 652 is in an outward convex arc shape, and the opposite surfaces of the fixingplate 651 and theclamping plate 652 are subjected to insulation treatment;

by pressing one end of theclamp plate 652, the clamping end of theclamp plate 652 is tilted, and the connecting lead 12 is placed in the arc-shaped groove, so that the connecting lead 12 can be conveniently clamped.

Example two

Referring to fig. 5 and 6, in this embodiment, the following scheme is added on the basis of the first embodiment, the rotatingassembly 61 includes arotating housing 611, therotating housing 611 is a cylindrical hollow structure, a connectingshaft 614 is disposed on one side of therotating housing 611, one end of the connectingshaft 614 is fixedly connected to a side surface of the right angle table 3, aleft chuck 613 is connected to one end of the connectingshaft 614 located at therotating housing 611, therotating housing 611 is rotatably sleeved at the end of theleft chuck 613 of the connectingshaft 614, aright chuck 615 matched with theleft chuck 613 is disposed at a connecting port of the connectingshaft 611 of therotating housing 611, tooth grooves are disposed on opposite surfaces of theleft chuck 613 and theright chuck 615, aspring 616 is disposed in an inner cavity of therotating housing 611, and two ends of thespring 616 respectively support against inner walls of theleft chuck 613 and therotating housing 611.

The outer side wall of therotating shell 611 is provided with arotating button 612, which is convenient for a user to rotate therotating shell 611.

The side of the right angle table 3 is further provided with anangle measuring device 10 for measuring the rotation angle of thesupport rod 62, theangle measuring device 10 is arc-shaped, the outer surface of theangle measuring device 10 is provided with angle scale marks, therotating shell 611 is provided with anangle indicating needle 66, and the direction of the indicatingneedle 66 is parallel to the direction of thesupport rod 62.

Be equipped with thelaser lamp 67 on the upperend bracing piece 62 ofrotatory shell 611, thelaser lamp 67 under operating condition, on the scale mark of light irradiation on the angle scale mark, the rotatory angle ofmeasurement bracing piece 62 that can be accurate. The laser lamp is an LED laser infrared lamp.

Ammeter fixedestablishment 4 includes loadingboard 41 andslider 43, the up end ofright angle platform 3 is equipped withspout 5,slider 43 sliding connection is inspout 5, the both ends ofslider 43 are equipped with fixed ear, fixed ear passes through setscrew 44 and fixesslider 43 inspout 5, the lower extreme of loadingboard 41 and the upper end fixed connection ofslider 43, the up end both sides of loadingboard 41 are equipped withelasticity curb plate 42,elasticity curb plate 42 is the U-shaped of invering, a lateral wall and theloading board 41 ofelasticity curb plate 42 are connected, and another lateral wall ofelasticity curb plate 42 is unsettled, during the use, withpincerlike ammeter 11 card between two elastic plates, the hanging wall through two elastic plates presss from both sides pincerlikeammeter 11 tightly.

When the device is used, the rotating shell 611 is pressed to separate the left chuck 613 and the right chuck 615, the rotating button 612 is rotated to enable the rotating shell 611 to drive the upper supporting rod 62 and the lower supporting rod 62 to rotate, the pressed rotating shell 611 is released, the left chuck 613 and the right chuck 615 are clamped again under the action of the spring 616, the rotating shell 611 is fixed, the angle of the connecting wire 12 is changed, and the stability of the supporting rod 62 is high; the angle measurer 10 is arranged on the side surface of the right angle table 3, and the indicating needle 66 and the laser lamp 67 are used for indicating the scales on the angle measurer 10, so that the rotating angle of the connecting lead 12 can be clearly and accurately observed; meanwhile, the position of the sliding block 43 in the sliding groove 5 is moved, so that the clamp end of the clamp ammeter 11 is always sleeved on the outer side of the connecting wire 12 when the angle of the connecting wire 12 changes, and is not in contact with the connecting wire 12, and the current value on the clamp ammeter 11 is observed, so that the change relation between the detection current of the clamp ammeter 11 and the angle of the detection wire passing through the clamp end is known, and the clamp ammeter 11 is conveniently and correctly used.

The working principle is as follows: according to the invention, the relevant circuit components of the calibration ammeter are arranged on thebase plate 1, theammeter fixing mechanism 4 for fixing theclamp ammeter 11 is arranged on the right-angle table 3, the relevant circuit components are connected during calibration, the clamp end of theclamp ammeter 11 is sleeved on the connecting wire 12, and the calibration operation is performed after the detection current of the ammeter is compared with the output current of thepower supply 8, so that the use is convenient and fast. According to the invention, a plurality of resistors are connected in series to change the current value on the connecting wire 12, repeated calibration is carried out for many times, and the calibration accuracy of the clamp-on ammeter 11 is increased; the wire supporting mechanism 6 capable of rotating by an angle is arranged on the side surface of the right-angle plate, and the ammeter fixing mechanism 4 capable of transversely fixing one end is arranged at the upper end of the right-angle platform 3, so that the angle between a detection wire and the clamp-on ammeter 11 can be changed during calibration, the angle relation between the detection current of the clamp-on ammeter 11 and the detection wire can be known, and the clamp-on ammeter 11 can be conveniently and correctly used; the left chuck 613 and the right chuck 615 are separated by pressing the rotating shell 611, the rotating button 612 is rotated, the rotating shell 611 drives the upper supporting rod 62 and the lower supporting rod 62 to rotate, the pressed rotating shell 611 is released, the left chuck 613 and the right chuck 615 are clamped again under the action of the spring 616, the rotating shell 611 is fixed, the angle of the connecting wire 12 is changed, and the stability of the supporting rod 62 is strong; by providing the angle measuring device 10 on the side surface of the rectangular table 3 and indicating the scale on the angle measuring device 10 by the indicating needle 66 and the laser lamp 67, the rotation angle of the connecting lead 12 can be clearly and accurately observed.

While the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and various changes, which relate to the related art known to those skilled in the art and fall within the scope of the present invention, can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.

Claims (10)

1. The utility model provides an auxiliary device that calibration ampere meter was used, includes bed plate (1), the both ends of bed plate (1) are equipped with handle (2), its characterized in that: a right-angle table (3) is arranged in the middle of the upper end face of the base plate (1), an ammeter fixing mechanism (4) is arranged at the upper end of the right-angle table (3), a related circuit component for calibrating an ammeter is arranged on one side of the upper end face of the base plate (1), and a wire supporting mechanism (6) for supporting wires of a related circuit part is arranged on the side face of the right-angle table (3);

the related circuit components comprise a power supply (8), a knife switch element (7), a resistor element (9) and a plurality of connecting wires (12), wherein the power supply (8), the knife switch element (7) and the resistor element (9) are all arranged on the base plate (1), and the power supply (8) is connected with the knife switch element (7) and the resistor element (9) through the plurality of connecting wires (12) to form a closed loop; the resistance member (9) comprises a plurality of resistors with fixed resistance values.

2. The auxiliary device for calibrating the ammeter according to claim 1, wherein the wire support mechanism (6) comprises a rotating assembly (61) disposed on the side of the right angle table (3), the upper end and the lower end of the rotating assembly (61) are respectively connected with a support rod (62), the ends of both of the connecting rods are connected with a cross rod (64) through a fixing sleeve (63), and the end of the cross rod (64) is provided with a clamping mechanism (65) for fixing the connecting wire (12) to be tested.

3. The auxiliary device for calibrating the ammeter of claim 2 wherein the clamping mechanism (65) comprises a fixing plate (651) and a clamping plate (652), one end of the fixing plate (651) is fixedly connected to the end of the cross bar (64), the clamping plate (652) is disposed on one side of the fixing plate (651), the opposite surfaces of the fixing plate (651) and the clamping plate (652) are both provided with a connecting protrusion (653), the connecting protrusions (653) of the fixing plate (651) and the clamping plate (652) are rotatably connected through a rotating shaft (654), and the rotating shaft (654) is provided with a torsion spring (616).

4. The auxiliary device for calibrating the ammeter as claimed in claim 3, wherein the fixing plate (651) is provided with an arc-shaped groove in the middle of the side thereof adjacent to the clamping plate (652), the middle of the clamping plate (652) is in the shape of an arc protruding outwards, and the opposite surfaces of the fixing plate (651) and the clamping plate (652) are insulated.

5. An auxiliary device for calibrating an ammeter according to claim 4 wherein said rotating assembly (61) comprises a rotating housing (611), said rotating housing (611) is a cylindrical hollow structure, one side of said rotating housing (611) is provided with a connecting shaft (614), one end of said connecting shaft (614) is fixedly connected to the side of the right angle table (3);

connecting axle (614) is located rotatory shell (611) one end and is connected with left chuck (613), rotatory shell (611) is rotated the cover and is established left chuck (613) end at connecting axle (614), rotatory shell (611) is located the connector of connecting axle (614) and is equipped with right chuck (615) that matches with left chuck (613), all be equipped with the tooth's socket on the opposite face of left chuck (613) and right chuck (615), be equipped with spring (616) in the inside cavity of rotatory shell (611), the inner wall of left chuck (613) and rotatory shell (611) is withstood respectively at the both ends of spring (616).

6. An auxiliary device for calibrating an ammeter as claimed in claim 5 wherein the outer side wall of the rotating housing (611) is provided with a rotating knob (612).

7. The auxiliary device for calibrating the ammeter according to any of the claims 2-6, wherein the side of the rectangular table (3) is further provided with an angle measuring device (10) for measuring the rotation angle of the support rod (62), the angle measuring device (10) is arc-shaped, the outer surface of the angle measuring device (10) is provided with angle scale marks, and the rotating shell (611) is provided with an angle indicating needle (66);

the direction of the indicating needle (66) is parallel to the direction of the supporting rod (62).

8. An auxiliary device for calibrating an ammeter used as claimed in claim 7 wherein the upper supporting rod (62) of the rotating case (611) is provided with a laser lamp (67), and the laser lamp (67) irradiates the graduation marks on the angle graduation marks in the working state.

9. The auxiliary device for calibrating an ammeter of claim 8 wherein said laser lamp is an LED laser infrared lamp.

10. The auxiliary device for calibrating the ammeter according to claim 8, wherein the ammeter fixing mechanism (4) comprises a bearing plate (41) and a sliding block (43), the upper end surface of the right-angle table (3) is provided with a sliding groove (5), the sliding block (43) is slidably connected in the sliding groove (5), two ends of the sliding block (43) are provided with fixing lugs, the fixing lugs fix the sliding block (43) in the sliding groove (5) through fixing screws (44), the lower end of the bearing plate (41) is fixedly connected with the upper end of the sliding block (43), two sides of the upper end surface of the bearing plate (41) are provided with elastic side plates (42), the elastic side plates (42) are in an inverted U shape, one side wall of each elastic side plate (42) is connected with the bearing plate (41), and the other side wall of each elastic side plate (42) is suspended.

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