Device for accurate measurement based on wire diameter

A device for accurate measurement based on wire diameter includes a clamp and two-space compensators. The clamp includes depressible grip handles to control opening and closing of two measurement sections. Two space compensators are respectively combinable with the two measurement sections. The space compensators each have a side that is recessed to form a first clamping section, such that the first clamping section is combinable with at least two fixing elements, which are each in an arc curved shape having one side recessed to form a second clamping section. The fixing elements are structured such that inside diameters defined by the second clamping sections thereof are reduced one by one in a direction away from the first clamping section. The fixing elements are selectable to have the inside diameter of the second clamping section matching a size of an electric wire to be measured.

TECHNICAL FIELD OF THE INVENTION

The present invention relates generally to a device for accurate measurement based on wire diameter, and more particularly to a device for accurate measurement based on wire diameter that allows for selective use of a proper hole diameter of space compensators according to a size of an electrical wire to be measured to achieve reliable clamping so as to make measurement of data of voltage/current more accurate.

DESCRIPTION OF THE PRIOR ART

Electronic measurement meters that are commonly used to measure electrical data including voltage and current are structured to provide multiple measurement modes for respectively measuring voltage, current, frequency, angle, watt, Var and the like and have been widely used today.

An electronic measurement meter that is currently used to measure electric data of voltage and current is generally made in the form of a clamp meter or a multimeter. Taking the clamp meter as an example, as shown inFIG. 1, a conventional structure of the clamp meter A generally comprises a host device A1and a measurement ring A2that is openable and arranged on a top of the host device A1. One part of the measurement ring A2is connected to a push knob A3such that depressing the push knob A3would cause the one part of the measurement ring A2to open to allow the measurement ring A2to pass through and clamp on an electric wire B. The measurement ring A2may then be used to detect electric data of voltage and current flowing through the electric wire B and the detected data are then displayed on a liquid crystal display A4of the host device A1.

However, the known clamp meter A is often provided with an excessively large diameter of the measurement ring A2so that a gap between the inside diameter of the measurement ring A2and the electric wire B is great, leading to easy sliding and displacing of the clamp meter A along the electric wire B. In addition, the great gap between the inside diameter of the measurement ring A2and the electric wire B often makes the measurement of data of the electric wire B by the clamp meter A inaccurate.

SUMMARY OF THE INVENTION

A device for accurate measurement based on wire diameter disclosed in the present invention comprises a clamp and two space compensators. The clamp is provided for measurement a voltage/a current and has an end that is provided with two depressible grip handles movable with respect to each other for selective opening/closing and an opposite end that is provided with two measurement sections movable with respect to each other for selective opening/closing, such that the two depressible grip handles are operable to control opening and closing of the two measurement sections. Two space compensators are respectively combined with the two measurement sections of the clamp. The space compensators each comprise a base. The base has one lateral side that is provided with two clip sections extending therefrom and an opposite lateral side that is recessed to form a first clamping section. The space compensators are each combined, through the two clip sections thereof, to the respective measurement section of the clamp such that the first clamping sections of the two space compensators are opposite to and corresponding to each other. The space compensators are combinable, through the first clamping sections thereof, with at least two fixing elements. The fixing elements are each in the faun of an arc curved shape having one side surface that is formed, through recessing, a second clamping section, wherein the second clamping sections of the fixing elements define hole diameters that are respectively reduced one by one in a direction away from the first clamping sections.

The feature of the present invention is that the space compensators are provided with first clamping sections for removably combinable with at least two fixing elements, and the fixing elements have second clamping sections that respectively define hole diameters that are reduced one by one in a direction away from the first clamping section so that the fixing elements that are closer to the space compensators have larger hole diameters for the second clamping sections of the fixing elements; and on the other hand, the fixing elements that are more distant from the space compensators have smaller hole diameters for the second clamping sections of the fixing elements. As such, due to the hole diameter (or inside diameter) defined by the second clamping section of each of the fixing elements being different, one of the fixing elements having a hole diameter that matches a size of an electric wire can be selected and user to achieve securely clamping of the electric wire by the clamp to provide more accurate detection data of voltage/current.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring first toFIGS. 2-6, the present invention provides a device for accurate measurement based on wire diameter, which comprises a clamp1and two space compensators2.

The clamp1is operable for measurement of voltage/current or other data (such as resistivity, frequency, and the like). The clamp1is provided, on one end thereof, with two depressible grip handles11that are opposite to each other and are movable with respect to each other for opening/closing. The clamp1is provided, on an opposite end thereof, with two measurement sections12that are opposite to each other and are movable with respect to each other for opening/closing. The measurement sections12are each in the form of a curved shape having a semi-circular configuration. When the two depressible grip handles11are depressed, the two measurement sections12are moved away from each other to show a separate and open condition. The two measurement sections12have sides that are opposite to each other and are each recessed to form an arc curved section121. Further, the clamp1is electrically connected with a transmission cable13, such that the transmission cable13may transmit data detected with the clamp1to preset detection equipment.

The two space compensators2are removably combinable with the arc curved sections121of the two measurement sections12. The space compensators2each comprise a base21. The base21is provided, on one lateral side thereof, with two clip sections22that are extended therefrom and is also formed, through recessing an opposite lateral side thereof, with a first clamping section23. The space compensators2are each combinable with the arc curved section121of the respective measurement section12by means of two clip sections22so as to have the space compensators2mounted to the measurement sections12of the clamp1(as shown inFIG. 2) with the first clamping sections23of the two space compensators2opposite to and corresponding to each other. Further, the space compensators2are each provided, on a surface of the first clamping section23thereof, with a first coupling section231, so that the first clamping section23of the space compensators2is removably combinable with at least two fixing elements3through the first coupling section231thereof. The space compensators3are each in the form of an arc curved shape having one side surface that is provided with a second coupling section31and an opposite side surface that is recessed to form a second clamping section32. The second clamping section32is formed, on a surface thereof, with a third coupling section321. The second clamping sections32and the first clamping sections23are curved toward the same direction such that inside diameters of the second clamping sections32of the fixing elements3are reduced, step by step, from the first clamping section23in a direction away therefrom.

The fixing elements3are structured such that the inside diameters of the second clamping sections32are reduced, step by step, from the first clamping section23in a direction away therefrom such that the inside diameter of the second clamping section32of one of the fixing elements3that is closer to the space compensators2is larger, while the inside diameter of the second clamping section32of one of the fixing elements3that is more distant from the space compensators2is smaller. Thus, the fixing elements3are sequentially stackable on and combinable to the first clamping section23of the space compensators2.

When the fixing elements3are combined with the first clamping section23of the space compensators2(as shown inFIG. 3), the fixing element3that is adjacent to the first clamping section23is coupled, through the second coupling section31, to the first coupling section231so that the fixing element3that is adjacent to the first clamping section23is fixedly mounted to the space compensators2. The remaining fixing elements3(that are the fixing elements3that are not adjacent to the first clamping section23) may then be mounted through coupling of the second coupling section31thereof with the third coupling section321of an adjacent one of the fixing elements so as to achieve a sequential stacking combination of the at least two fixing elements3(as shown inFIG. 4).

A first example of use of the present invention will be provided for illustration. As shown inFIG. 5, when the clamp1is used to measure an electric wire4having a small diameter, based on the diameter of the electric wire4, one of the fixing elements3having a matching hole diameter is selected and used to securely clamp against the wire. For example, the fixing elements3are stacked in sequence from the one having the smallest hole diameter to have the second clamping section32of the latest one of the fixing elements that have been stacked clamping against the electric wire4such that the clamp1may securely clamp and fix the electric wire4without relative sliding and movement whereby accurate measurement of data of voltage/current can be obtained.

A second example of use of the present invention will be provided for illustration. As shown inFIG. 6, when the clamp1is used to measure an electric wire4having a large diameter, based on the diameter of the electric wire4, one of the fixing elements3having a matching hole diameter is selected and used to securely clamp against the wire. For example, the fixing elements3that have been stacked can be removed in sequence from the one having the smallest hole diameter to have the second clamping section32of the first one of the fixing elements that have not been removed clamping against the electric wire4such that the clamp1may securely clamp and fix the electric wire4without relative sliding and movement whereby accurate measurement of data of voltage/current can be obtained.

Referring toFIG. 7, another embodiment of the present invention is illustrated, wherein the first clamping sections23of the space compensators2are not provided with the first coupling sections231, while multiple ones of the space compensators2having first clamping sections23of different hole diameters are provided so that one of the space compensators2having a proper hole diameter matching the diameter of the electric wire4may be selected and used to achieve secure clamping so that the clamp1may securely clamp against the electric wire4without relative sliding and movement whereby accurate measurement of data of voltage/current can be obtained.