Clip-on ammeter and use method thereof

Abstract

The invention discloses a clip-on ammeter, and relates to the technical field of current measurement, the clip-on ammeter comprises a measuring piece and a display piece, the measuring piece extrudes a guide block to make a wire enter a measuring area to clamp the measured wire and measure current to generate first information, and the first information is wirelessly transmitted to the display piece after being converted; and an operator reads the first information transmitted by the numerical value through the display part. Safety risks of current measurement in environments such as crossing of high-voltage lines and low-voltage lines can be eliminated, clamping of the lines can be well completed in a narrow space, the requirement for occupied space in the using process is reduced, the jaw does not need to be manually pulled by a worker to be opened and closed, and the working efficiency is improved under the condition that opening and closing actions and measurement can be completed. The safety distance between a worker and the ampere meter is increased so as to prevent electric shock caused by electrified bodies around a measured circuit, and the measurement result on the ampere meter is convenient to observe when the ampere meter is used.

Description

Technical Field

[0001] The present invention relates to the field of current measurement, in particular to a clamp ammeter and a use method thereof. Background Art

[0002] At present, the clamp ammeters used in work still have some inconveniences in complex sites. For example, it is necessary to measure current in electric wells, bridges, transformers, distribution cabinets, and narrow line passages laid by residents themselves. Because the space is very narrow, the workers cannot reach the clamp ammeter with their hands due to the long distance, or the clamp ammeter jaws cannot complete the clamping action due to the small spacing between the measured wires, or the risk of electric shock is high when measuring with the clamp ammeter due to the close distance to the live body. In these situations, the on-site measurement work cannot be completed smoothly, which increases working time and workload, reduces work efficiency, and some even cannot complete the measurement.

[0003] Therefore, there is a need for a clamp ammeter that can be used in crowded and complex working environments, eliminating the safety risks of measuring current in environments such as high and low voltage line intersections, and effectively clamping the line in a narrow space, reducing the space required during use. The jaws do not need to be manually opened and closed by the staff. While ensuring that the opening and closing action and measurement can be completed, the safety distance between the staff and the ammeter is increased to prevent the occurrence of electric shock by charged objects around the measured line, and it is very convenient to observe the measurement results on the ammeter during use. Summary of the Invention

[0004] Therefore, the technical problems to be solved by the present invention are: the problem that the clamp ammeter is inconvenient and unsafe to measure in a complex and narrow environment, and the problem that the measurement results are difficult to observe.

[0005] The above technical problems are solved by the following technical solutions:

[0006] The present invention provides a clamp ammeter comprising a measuring component and a display component.

[0007] In a preferred embodiment of the clamp ammeter of the present invention, the measuring member includes a jaw, a guide block, and a clamp body, wherein the jaw is provided at the front end of the measuring member and has a recessed area in the middle, the guide block is rotatably connected to both ends of the jaw, the two guide blocks and the recessed area form a measuring area for measuring the current of the conductor, the conductor enters the recessed area by squeezing the guide blocks, and the clamp body is provided at one end of the jaw away from the guide block; the measuring member further includes a current measuring circuit and a wireless communication circuit, the current measuring circuit being provided inside the jaw to measure the current of the conductor and generate first information, and the wireless communication circuit being provided inside the clamp body to convert and transmit the first information;

[0008] The display component is physically separated from the measuring component and includes a display and a wireless receiving circuit. The wireless receiving circuit receives the first information sent by the wireless communication circuit, and the display displays the first information.

[0009] In a preferred embodiment of the clamp ammeter of the present invention, the telescopic member is detachably connected to the measuring member and has an adjustable length.

[0010] In a preferred embodiment of the clamp ammeter of the present invention, the telescopic member includes an inner rod and an outer rod, and one end of the inner rod is lockably sleeved inside one end of the outer rod.

[0011] In a preferred embodiment of the clamp ammeter described in the present invention: the telescopic member also includes a retaining frame and a locking block, the retaining frame is fixed to one end of the inner rod inserted into the outer rod, the retaining frame is provided with a locking groove, and the locking block is arranged inside the locking groove.

[0012] In a preferred embodiment of the clamp ammeter of the present invention, the depth of the locking groove changes monotonically in the circumferential direction of the inner rod.

[0013] In a preferred embodiment of the clamp ammeter described in the present invention: the distance from the bottom of the lock slot to the inner wall of the outer rod changes monotonically, and the length of the locking block in the direction from the bottom of the lock slot to the inner wall of the outer rod is between the distance range from the bottom of the lock slot to the inner wall of the outer rod.

[0014] In a preferred embodiment of the clamp ammeter of the present invention, the measuring element uses an insulating housing to protect the current measuring circuit and the wireless communication circuit inside.

[0015] In a preferred embodiment of the clamp ammeter of the present invention, the guide block is rotatably linked to the jaws via a spring, and the spring keeps the guide block in a default position, so that the two guide blocks and the jaws form a closed measuring area.

[0016] The present invention also provides a method for using the clamp ammeter, which includes measuring current, transmitting information, and reading information.

[0017] In a preferred embodiment of the method for using the clamp ammeter of the present invention: a measuring member is used to clamp the measured conductor by squeezing a guide block to allow the conductor to enter the measuring area and measure the current to generate first information;

[0018] converting the first information using a measuring component and wirelessly transmitting the information to a display component;

[0019] The operator reads the first information transmitted in numerical form through the display unit.

[0020] In a preferred embodiment of the method for using the clamp ammeter of the present invention: when it is necessary to measure deeply or through a narrow space, a telescopic part is installed for the measuring piece, the telescopic part is adjusted to the required length, and the telescopic part is operated to move away from one end of the measuring piece, so that the measuring piece indirectly clamps the measured wire and measures the current to generate first information.

[0021] The beneficial effects of the present invention are that it can eliminate the safety risks of measuring current in environments such as the intersection of high and low voltage lines, effectively complete the clamping of lines in narrow spaces, reduce the space requirements during use, and the jaws do not need to be manually opened and closed by staff. While ensuring that the opening and closing actions and measurements can be completed, the safety distance between the staff and the ammeter is increased to prevent the occurrence of electric shock situations where there are charged bodies around the measured line, and it is very convenient to observe the measurement results on the ammeter during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention, and are not intended to limit the present invention.

[0023] Figure 1 A diagram showing the guide block of a clamp ammeter contacting the conductor to be measured;

[0024] Figure 2 A diagram showing a state in which the guide block of a clamp ammeter is separated by the conductor to be measured;

[0025] Figure 3 A diagram showing the guide block and jaws of a clamp-on ammeter holding the conductor to be measured is shown;

[0026] Figure 4 A diagram showing the display of a clamp ammeter is shown;

[0027] Figure 5 A side cross-sectional view of the telescopic member of the clamp ammeter is shown;

[0028] Figure 6 A top cross-sectional view of the telescopic member of a clamp-on ammeter is shown;

[0029] Figure 7 An axonometric view of the telescopic member of a clamp-on ammeter is shown;

[0030] Figure 8 A flow chart showing how to use a clamp ammeter is shown;

[0031] Figure 9 A flow chart showing another method of using a clamp ammeter is shown. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0033] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0034] Example 1, with reference to Figure 1 This embodiment provides a clamp ammeter, including a measuring component 100 and a display component 200.

[0035] The measuring element 100 is used to clamp the measured conductor to generate current data and transmit it to the display element 200. The display element 200 receives the current information and displays it to the staff.

[0036] Measuring device 100 includes jaws 101, a guide block 102, and a jaw body 103. Jaws 101 and guide block 102 are used to clamp the conductor being measured. Jaws 101 are located at the front end of measuring device 100, with a recessed area K1 in the middle. Jaws 101 houses a portion of the current measurement circuitry, allowing the conductor within recessed area K1 to be measured. Guide block 102 prevents the conductor from escaping recessed area K1.

[0037] The guide blocks 102 are rotatably connected to the ends of the jaws 101. The two guide blocks 102 and the recessed area K measure the current of the conductor. The conductor enters the recessed area K1 by squeezing the guide blocks 102. The guide blocks 102 are connected to the ends of the jaws 101 via springs, so that the guide blocks 102 have a default position and can return to the default position after the force is removed. Before measuring the current, the jaws 103 are pushed toward the conductor. The guide blocks 102 contact the conductor and begin to rotate under force, allowing the conductor to enter the recessed area K1 so that the current can be measured. At the same time, after the conductor enters the recessed area K1, the guide blocks 102 disengage from the conductor and the force is removed, returning to the default position, surrounding the conductor and preventing it from leaving the recessed area K1 without force. After the measurement is completed, the jaws 101 are retracted, and the guide blocks 102 rotate again to allow the conductor to exit the measurement area.

[0038] The clamp body 103 is arranged at one end of the jaw 101 away from the guide block 102; it also includes a current measuring circuit and a wireless communication circuit. The current measuring circuit is arranged inside the jaw 101 to measure the current of the wire and generate first information. The wireless communication circuit is arranged inside the clamp body 103 to convert and send the first information.

[0039] The current measurement circuit and wireless communication circuit are located within the jaw body 103. A portion of the current measurement circuit is located near the recessed area K1 of the jaws 101, directly sensing and measuring the current flowing through the conductor, generating raw data as the primary information. The wireless communication circuit converts and wirelessly transmits the primary information generated by the measurement circuit for easy viewing and storage by personnel.

[0040] The display unit 200 is physically separated from the measuring unit 100 and includes a display 201 and a wireless receiving circuit. The wireless receiving circuit receives the first information sent by the wireless communication circuit, and the display 201 displays the first information.

[0041] The display unit 200 is an independent handheld part responsible for displaying the measurement results to the user. It is physically separated from the measuring unit 100 and there is no wire connection between the two. Instead, a wireless receiving circuit is used to receive the first information sent by the wireless communication circuit, making it convenient for the operator to read in a safe or convenient observation position.

[0042] Example 2, reference Figure 1 This embodiment provides a clamp ammeter, including a measuring element 100, a display element 200 and a telescopic element 300.

[0043] The measuring piece 100 is used to clamp the measured wire to generate current data and transmit it to the display piece 200. The display piece 200 receives the current information and displays it to the staff. The telescopic piece 300 is used to extend the working range of the measuring piece 100 and reduce the degree of danger encountered by the staff.

[0044] Measuring device 100 includes jaws 101, a guide block 102, and a jaw body 103. Jaws 101 and guide block 102 are used to clamp the conductor being measured. Jaws 101 are located at the front end of measuring device 100, with a recessed area K1 in the middle. Jaws 101 houses a portion of the current measurement circuitry, allowing the conductor within recessed area K1 to be measured. Guide block 102 prevents the conductor from escaping recessed area K1.

[0045] The guide blocks 102 are rotatably connected to the ends of the jaws 101. The two guide blocks 102 and the recessed area K measure the current of the conductor. The conductor enters the recessed area K1 by squeezing the guide blocks 102. The guide blocks 102 are connected to the ends of the jaws 101 via springs, so that the guide blocks 102 have a default position and can return to the default position after the force is removed. Before measuring the current, the jaws 103 are pushed toward the conductor. The guide blocks 102 contact the conductor and begin to rotate under force, allowing the conductor to enter the recessed area K1 so that the current can be measured. At the same time, after the conductor enters the recessed area K1, the guide blocks 102 disengage from the conductor and the force is removed, returning to the default position, surrounding the conductor and preventing it from leaving the recessed area K1 without force. After the measurement is completed, the jaws 101 are retracted, and the guide blocks 102 rotate again to allow the conductor to exit the measurement area.

[0046] The clamp body 103 is arranged at one end of the jaw 101 away from the guide block 102; it also includes a current measuring circuit and a wireless communication circuit. The current measuring circuit is arranged inside the jaw 101 to measure the current of the wire and generate first information. The wireless communication circuit is arranged inside the clamp body 103 to convert and send the first information.

[0047] The current measurement circuit and wireless communication circuit are located within the jaw body 103. A portion of the current measurement circuit is located near the recessed area K1 of the jaws 101, directly sensing and measuring the current flowing through the conductor, generating raw data as the primary information. The wireless communication circuit converts and wirelessly transmits the primary information generated by the measurement circuit for easy viewing and storage by personnel.

[0048] The display unit 200 is physically separated from the measuring unit 100 and includes a display 201 and a wireless receiving circuit. The wireless receiving circuit receives the first information sent by the wireless communication circuit, and the display 201 displays the first information.

[0049] The display unit 200 is an independent handheld part responsible for displaying the measurement results to the user. It is physically separated from the measuring unit 100 and there is no wire connection between the two. Instead, a wireless receiving circuit is used to receive the first information sent by the wireless communication circuit, making it convenient for the operator to read in a safe or convenient observation position.

[0050] Specifically, the telescopic member 300 is detachably connected to the measuring member 100 and can be adjusted in length. The telescopic member 300 can be used to extend the working range of the measuring member 100 when necessary.

[0051] The telescopic member 300 can be connected to the measuring member 100 via a buckle or a thread.

[0052] Specifically, the telescopic member 300 includes an inner rod 301 and an outer rod 302 , and one end of the inner rod 301 is lockably sleeved inside one end of the outer rod 302 .

[0053] The inner rod 301 penetrates the outer rod 302 to different degrees, causing the overall length of the telescopic member 300 to change. The deeper the inner rod 301 penetrates the outer rod 302, the shorter the telescopic member 300 is. At the same time, the inner rod 301 can be locked at any position within the outer rod 302 to prevent the length of the telescopic member 300 from changing during current measurement.

[0054] Specifically, telescopic member 300 also includes a retainer 303 and a locking block 304. Retainer 303 is fixed to the end of inner rod 301 that is inserted into outer rod 302. Retainer 303 is provided with a locking slot K2, and locking block 304 is disposed within locking slot K2. Retainer 303 and locking block 304 are used to lock inner rod 301 deeply inserted into outer rod 302. As locking block 304 moves within locking slot K2, the distance from the inner wall of outer rod 302 varies, causing the friction between locking block 304 and the inner wall of outer rod 302 to vary.

[0055] Specifically, the depth of the locking groove K2 changes monotonically in the circumferential direction of the inner rod 301 .

[0056] Ensure that when the locking block 304 moves, one direction is used for locking and the other direction is used for unlocking.

[0057] Specifically, the distance from the bottom of the lock slot K2 to the inner wall of the outer rod 302 changes monotonically, and the length of the locking block 304 in the direction from the bottom of the lock slot K2 to the inner wall of the outer rod 302 is within the distance range from the bottom of the lock slot K2 to the inner wall of the outer rod 302.

[0058] In one embodiment, the shape of the locking groove K2 does not change in the axial direction of the outer rod 302, the side section is rectangular, the locking block 304 is cylindrical, and the inner rod 301 is rotated so that the locking block 304 fits tightly against the inner wall of the outer rod 302 to lock the telescopic member 300. Rotating the inner rod 301 in the other direction can unlock the telescopic member 300.

[0059] In another embodiment, the shape of the locking groove K2 does not change in the axial direction of the outer rod 302, the side section is semicircular, the locking block 304 is spherical, and rotating the inner rod 301 can also allow the locking block 304 to fit tightly against the inner wall of the outer rod 302 to lock the telescopic member 300. Rotating the inner rod 301 in the other direction can unlock the telescopic member 300.

[0060] Specifically, the measuring element 100 uses an insulating shell to protect the internal current measurement circuit and wireless communication circuit.

[0061] The telescopic member 300 also uses an insulating shell to ensure that the staff always maintains a safe distance from the charged object during measurement.

[0062] Example 3, reference Figure 1 This embodiment provides a method for using a clamp ammeter, including measuring current, transmitting information, and reading information, which is suitable for conventional working environments or working environments with slightly inconvenient space.

[0063] The measuring device clamps the conductor under test by squeezing the guide block, forcing the conductor into the measurement area. This allows the current to be measured and generates first information. To measure the current of a specific conductor, the operator first holds the measuring device 100 and aligns its front jaws 101 with the target conductor. The operator then simply pushes the measuring device 100 forward, forcing the conductor into contact with and squeezing the guide block 102. The force applied to the guide block 102 causes it to rotate, clearing the way and allowing the conductor to enter the measurement area K1 in the center of the jaws 101, completing the clamping process. Once clamped, the current measurement circuit within the measuring device 100 automatically measures the conductor current and generates first information containing the current value.

[0064] The measuring device converts the first information and transmits it wirelessly to the display device. Then, the wireless communication circuit inside the measuring device 100 converts and processes the first information and immediately sends it out in the form of a wireless signal.

[0065] The operator reads the first information transmitted via the display unit. Simultaneously, the operator holds the display unit 200, physically separate from the measuring unit 100, in their other hand or in a convenient position. Upon receiving the wireless signal, the display unit 200 clearly displays the measured current value on its display 201, allowing the operator to read it directly.

[0066] Example 4, reference Figure 1 This embodiment provides a method for using a clamp ammeter, including extending the measuring piece to measure current, transmit information, and read information. It is suitable for scenarios where the measurement position is too high or too deep, or there are dangerous sources such as strong electricity or high voltage around the measured wire, making it difficult or inconvenient for operators to directly contact it.

[0067] When it is necessary to measure deep into or through a narrow space, a telescopic piece is installed on the measuring piece, the telescopic piece is adjusted to the required length, and the telescopic piece is operated to move away from one end of the measuring piece, so that the measuring piece can indirectly clamp the measured wire and measure the current to generate the first information.

[0068] When the measurement position is too high or too deep, or there are dangerous sources such as strong electricity or high voltage around the measured wire, making it difficult or inconvenient for the operator to directly contact the wire, the operator first installs and combines the telescopic member 300 with the measuring member 100. Subsequently, the telescopic member 300 is adjusted and locked at the required length based on the actual distance of the target wire on site. Next, the operator holds the telescopic member 300 away from one end of the measuring member 100 and uses the length advantage of the telescopic member 300 to safely deliver the measuring member 100 to the position of the target wire. The subsequent clamping action is the same as in Example 3, that is, the force applied by the telescopic member 300 indirectly allows the jaws 101 of the measuring member 100 to squeeze the wire and complete the clamping and measurement, generating the first information. Finally, the measurement information is also wirelessly transmitted from the measuring member 100 to the display member 200 next to the operator for reading. In this way, by using the telescopic member 300, the operating range is greatly extended and the safety of personnel is guaranteed.

[0069] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A clamp ammeter, characterized in that: include, A measuring piece (100) comprises a jaw (101), a guide block (102) and a jaw body (103), wherein the jaw (101) is arranged at the front end of the measuring piece (100) and a concave area (K1) is provided in the middle thereof, the guide block (102) is rotatably connected to the two ends of the jaw (101), the two guide blocks (102) and the concave area (K) are measuring areas for measuring the current of a conductor, the conductor enters the concave area (K1) by squeezing the guide block (102), and the jaw body (103) is arranged at one end of the jaw (101) away from the guide block (102); and further comprises a current measuring circuit and a wireless communication circuit, wherein the current measuring circuit is arranged inside the jaw (101) and measures the current of the conductor and generates first information, and the wireless communication circuit is arranged inside the jaw body (103) and is used to convert and send the first information; The display unit (200) is physically separated from the measuring unit (100) and includes a display (201) and a wireless receiving circuit. The wireless receiving circuit receives the first information sent by the wireless communication circuit, and the display (201) displays the first information.

2. The clamp ammeter according to claim 1, wherein: Also includes, The telescopic member (300) is detachably connected to the measuring member (100) and can be adjusted in length.

3. The clamp ammeter according to claim 2, wherein: The telescopic member (300) comprises an inner rod (301) and an outer rod (302), and one end of the inner rod (301) is lockably sleeved inside one end of the outer rod (302).

4. The clamp ammeter according to claim 3, wherein: The telescopic member (300) further comprises a retaining frame (303) and a locking block (304); the retaining frame (303) is fixed to one end of the inner rod (301) inserted into the interior of the outer rod (302); a locking groove (K2) is provided on the retaining frame (303); and the locking block (304) is arranged inside the locking groove (K2).

5. The clamp ammeter according to claim 4, wherein: The depth of the locking groove (K2) changes monotonically in the circumferential direction of the inner rod (301).

6. The clamp ammeter according to claim 5, wherein: The distance from the bottom of the locking groove (K2) to the inner wall of the outer rod (302) changes monotonically, and the length of the locking block (304) in the direction from the bottom of the locking groove (K2) to the inner wall of the outer rod (302) is within the range of the distance from the bottom of the locking groove (K2) to the inner wall of the outer rod (302).

7. The clamp ammeter according to claim 1, wherein: The measuring element (100) uses an insulating shell to protect the current measuring circuit and the wireless communication circuit inside.

8. The clamp ammeter according to claim 1, wherein: The guide block (102) is rotationally linked to the jaws (101) via a spring, and the spring keeps the guide block (102) in a default position, so that the two guide blocks (102) and the jaws (101) form a closed measuring area.

9. A method for using a clamp ammeter, characterized in that: Using a measuring member to clamp the measured conductor by squeezing a guide block to allow the conductor to enter a measuring area and measure the current to generate first information; converting the first information using a measuring component and wirelessly transmitting the information to a display component; The operator reads the first information transmitted in numerical form through the display element.

10. The clamp ammeter according to claim 9, wherein: When measurement needs to be made in-depth or through a narrow space, a telescopic member is installed for the measuring member, the telescopic member is adjusted to the required length, and the telescopic member is operated away from one end of the measuring member, so that the measuring member can indirectly clamp the measured wire and measure the current to generate the first information.

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