Measuring device

Abstract

The invention relates to a measuring device used for measuring the resistance value of a cable to be measured, and relates to the technical field of power equipment testing. When the resistance value of the to-be-tested cable needs to be measured, the to-be-tested part of the to-be-tested cable abuts against the bearing piece, and the to-be-tested part is clamped by the clamping piece. A loop is formed among the first measuring piece, the clamping piece and the to-be-tested part and can measure the current value of the to-be-tested part, and a loop is formed among the second measuring piece, the bearing piece and the to-be-tested part and can measure the voltage value of the to-be-tested part. The two clamping pieces move away from each other in the first direction, so that the to-be-tested cable can be unfolded in the axis direction of the to-be-tested cable, the to-be-tested cable exerts pressure on the bearing piece in the gravity direction, and the bearing piece is stressed to move towards the frame body in the gravity direction. Therefore, the contact between the to-be-tested part of the to-be-tested cable and the bearing piece is tighter, and the contact between the clamping piece and the to-be-tested part is tighter, so that the measurement result of the measurement mechanism is more accurate and more reliable.

Description

Technical Field

[0001] The present application relates to the technical field of power equipment testing, and in particular to a measuring device. Background Art

[0002] The resistance value of the cable under test is an important technical parameter to measure its quality. By measuring the resistance value, it can be determined whether the cable under test meets the relevant standards and specifications. However, due to the lack of accuracy of current measurement equipment, it is impossible to accurately measure the resistance value of the cable under test, making it difficult to evaluate the actual performance of the cable under test. Summary of the invention

[0003] Based on this, the present application provides a measuring device to improve the measurement accuracy of the resistance value of a cable to be measured.

[0004] The present application provides a measuring device, wherein the cable to be tested comprises a conductive portion and an insulating portion covering a portion of the outer surface of the conductive portion, the conductive portion not covered by the insulating portion and exposed to the outside is the portion to be tested, and the cable to be tested has at least four portions to be tested; the measuring device comprises:

[0005] Frame;

[0006] Two bearing members, used for bearing two of the at least four to-be-tested parts, the bearing members being configured to be able to move relative to the frame along the direction of gravity in response to a force acting along the direction of gravity;

[0007] Two clamping members are arranged on the frame at intervals along a first direction, and the two clamping members are respectively used to clamp the other two parts to be tested of the at least four parts to be tested, and along the first direction, the two clamping members are configured to be close to each other or away from each other along the first direction; the first direction is parallel to the central axis direction of the cable to be tested; and

[0008] The measuring mechanism comprises a first measuring member and a second measuring member, wherein the first measuring member has two first connecting ends, the two first connecting ends are electrically connected to the two clamping members in a one-to-one correspondence, and the second measuring member has two second connecting ends, the two second connecting ends are electrically connected to the two bearing members in a one-to-one correspondence;

[0009] Wherein, along the first direction, the two supporting members are located between the two clamping members.

[0010] In one embodiment, the measuring device also includes an elastic member, whose two ends are respectively connected to the frame and the supporting member; the elastic member is configured to be compressed along the direction of gravity when the two clamping members move away from each other along the first direction, and to be released in a direction opposite to the direction of gravity when the two clamping members move toward each other along the first direction.

[0011] In one embodiment, the clamping member includes two clamping portions spaced apart along the second direction; along the second direction, the two clamping portions are configured to be relatively movable and connected to the frame;

[0012] The first direction, the second direction and the gravity direction are perpendicular to each other.

[0013] In one embodiment, the two clamping parts are respectively a first clamping part and a second clamping part; the first clamping part includes a first clamping sub-part, and the second clamping part includes a second clamping sub-part; at least one of the first clamping sub-part and the second clamping sub-part is arranged in plurality along the first direction.

[0014] In one embodiment, the first clamping sub-portion is provided with a first groove along the second direction, and the cross-sectional area of ​​the first groove gradually decreases along the direction from the opening of the first groove to the bottom of the first groove; and the two side walls of the first groove which are arranged opposite to each other along the gravity direction are symmetrically arranged along the central axis of the first groove, and the central axis of the first groove is parallel to the second direction; and / or

[0015] The second clamping sub-portion is provided with a second groove along the second direction, and the cross-sectional area of ​​the second groove gradually decreases along the direction of the opening of the second groove pointing to the bottom of the second groove; and the second groove is symmetrically arranged on the central axis of the second groove with respect to the two side walls along the direction of gravity, and the central axis of the second groove is parallel to the second direction.

[0016] In one of the embodiments, the first clamping sub-portions and the second clamping sub-portions are alternately arranged along the first direction.

[0017] In one embodiment, along the first direction, a first accommodating space for accommodating the second clamping sub-section is defined between two adjacent first clamping sub-sections; and / or

[0018] Along the first direction, a second accommodating space for accommodating the first clamping sub-portion is defined between two adjacent second clamping sub-portions.

[0019] In one embodiment, the support member is provided with a third groove along the direction of gravity; along the direction of gravity, the cross-sectional area of ​​the third groove gradually decreases; and the third groove is symmetrically arranged on the central axis of the third groove along the two side walls relative to each other along the second direction, the central axis of the third groove is parallel to the direction of gravity, and the first direction is perpendicular to the second direction and the direction of gravity.

[0020] In one embodiment, the surface of the third groove bottom is a continuous curved surface.

[0021] In one of the embodiments, the measuring device further comprises a supporting member, and the supporting member is used to support the insulating portion of the cable to be measured.

[0022] In the above-mentioned measuring device, the cable to be tested includes a conductive part and an insulating part that wraps part of the outer surface of the conductive part. The conductive part that is not wrapped by the insulating part and exposed to the outside is defined as the part to be tested, and the cable to be tested has at least four parts to be tested. The measuring device includes a frame, a bearing, a clamping member and a measuring mechanism. When it is necessary to measure the resistance value of the cable to be tested, the part to be tested of the cable to be tested is brought into contact with the bearing, and the part to be tested is clamped by the clamping member. A loop is formed between the first measuring member, the clamping member and the part to be tested, which can measure the current value of the part to be tested. A loop is formed between the second measuring member, the bearing and the part to be tested, which can measure the voltage value of the part to be tested. The two clamping members move away from each other along the first direction, so that the cable to be tested can be unfolded in the axial direction of the cable to be tested. Both ends of the cable to be tested are subjected to a pulling force in the first direction. In the direction of gravity, the cable to be tested will apply a pressure to the bearing member, so that the bearing member is forced to move toward the frame along the direction of gravity, thereby making the contact between the to-be-tested portion of the cable to be tested and the bearing member closer, and the contact between the clamping member and the to-be-tested portion closer, so that the measurement result of the measuring mechanism is more accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of a measuring device in some embodiments of the present application.

[0024] Figure 2 A schematic diagram of the three-dimensional structure of a cable to be tested provided in one embodiment of the present application.

[0025] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the carrier in the measuring device.

[0026] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the clamping part in the measuring device.

[0027] The reference numerals in the specific implementation manner are as follows:

[0028] 100. Measuring device; 200. Cable to be tested; D. Conductive part; J. Insulating part; CS. Part to be tested; 1. Frame; 2. Support member; 3. Carrying member; 4. Clamping member; 41. First clamping part; 411. First clamping sub-part; 42. Second clamping part; 421. Second clamping sub-part; 5. Elastic member; C1. First groove; C2. Second groove; C3. Third groove; K1. First accommodating space; K2. Second accommodating space; F1. First direction; F2. Second direction; F3. Gravity direction. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0035] See also Figure 1 and Figure 2 , Figure 1 Schematic diagram of the three-dimensional structure of the measuring device 100 in some embodiments of the present application is shown. Figure 2 The three-dimensional structural schematic diagram of the cable 200 to be tested provided in an embodiment of the present application is shown. The measuring device 100 is used to measure the resistance value of the cable 200 to be tested. The cable 200 to be tested includes a conductive portion D and an insulating portion J that wraps a portion of the outer surface of the conductive portion D. The conductive portion D that is not wrapped by the insulating portion J and exposed to the outside is the portion to be tested CS. The cable 200 to be tested has at least four portions to be tested CS.

[0036] Select a cable suitable for the test, so that its length and specifications meet the test requirements, and mark the locations where the insulation J of the cable needs to be removed on the cable. These locations will form the test section CS. In this way, the formed test section CS is conductive and can be connected to the wire to form a circuit. Four test sections CS can be formed by removing four insulation sections J. Figure 2 Alternatively, two insulating portions J with larger areas may be removed, and four test portions CS may be selected from the cable 200 on which the insulating portions J are removed.

[0037] The conductive part D refers to the metal conductor responsible for transmitting electrical energy in the cable 200 to be tested, which is usually made of copper or aluminum and can be in the form of a single strand or multiple strands. The insulating part J is used for electrical insulation and is usually made of plastic, rubber or other materials with good electrical insulation properties. The part to be tested CS is directly exposed to the outside, which is convenient for direct contact and measurement of the resistance value of the part to be tested CS.

[0038] The measuring device 100 includes a frame 1, a bearing member 3, a measuring mechanism (not shown in the figure) and a clamping member 4. Two clamping members 4 are arranged on the frame 1 at intervals along a first direction F1, and the central axis direction of the cable 200 to be tested and the first direction F1 are parallel to each other. The two clamping members 4 are used to clamp two test parts CS of the cable 200 to be tested. After the cable 200 is placed on the bearing member 3 by an operator and the clamping members 4 clamp the test parts CS, the two clamping members 4 are configured to be able to approach or move away from each other along the first direction F1, so that the cable 200 to be tested can be flatly unfolded in the central axis direction of the cable 200 to be tested, and a force along the gravity direction F3 can be applied to the cable 200 to be tested.

[0039] The carrier 3 is used to carry two of the at least four test parts CS, and the carrier 3 is configured to be able to respond to the force along the gravity direction F3 and move relative to the frame along the gravity direction F3. When the test part CS is placed on the carrier 3 and the test part CS gives the carrier 3 a force in the gravity direction F3, the carrier 3 can move relative to the frame along the gravity direction F3, thereby making the test part CS and the carrier 3 more tightly connected. When the clamping member 4 straightens the test cable 200 along the central axis of the cable 200, the relative position of the test cable 200 and the measuring device 100 remains unchanged, and the test part CS and the carrier 3 are relatively stationary.

[0040] The measuring mechanism includes a first measuring piece and a second measuring piece. The first measuring piece has two first connecting ends, and the two first connecting ends are electrically connected to the two clamping pieces 4 in a one-to-one correspondence. When the tested part CS is connected to the clamping piece 4, a loop is formed between the first measuring piece, the clamping piece 4 and the tested part CS. Specifically in the present application, the first measuring piece includes two current lines and a power supply connected to the current, one end of one current line is connected to one of the two clamping pieces 4, and the other end is connected to the positive pole of the power supply, one end of the other current line is electrically connected to the other clamping piece 4, and the other end is connected to the negative pole of the power supply, thereby forming a current loop and measuring the current value of the cable 200 to be tested.

[0041] The second measuring member has two second connection ends, and the two second connection ends are electrically connected to the two carriers 3 in a one-to-one correspondence. When the part CS to be tested is placed on the carrier 3, a loop is formed between the second measuring member, the carrier 3 and the part CS to be tested. Specifically in the present application, the second measuring member includes two voltage lines and a voltage measuring instrument. One end of the voltage line is electrically connected to the voltage measuring instrument, and the other end is electrically connected to the carrier 3. The carrier 3, the voltage measuring instrument and the part CS to be tested form a loop, thereby measuring the voltage drop of the cable 200 to be tested. The resistance value of the cable is calculated by the measured voltage drop and current value. In this way, the voltage line and the current line are independent, which can reduce interference between each other and improve the measurement accuracy of the resistance value.

[0042] At least four means that at least four test sections CS can be set on the cable 200 to be tested, and five, six, seven, etc. can be set, and four are selected from more than four test sections CS to perform resistance measurement. At least two test sections CS are used to form a loop test current, and at least two test sections CS are used to form a loop test voltage. The resistance value is obtained by dividing the measured voltage value by the measured current value.

[0043] By arranging two bearing members 3 between two clamping members 4 along the first direction F1, correspondingly, the two parts to be tested CS connected to the bearing member 3 are located between the two parts to be tested CS connected to the clamping member 4. In this way, when the first connection end of the first measuring member is electrically connected to the clamping member 4, a loop is formed between the first measuring member, the clamping member 4 and the cable 200 to be tested, and the current can sequentially pass through the positive electrode of the power supply, one of the two clamping members 4, one of the two parts to be tested CS connected to the clamping member 4, the other of the two parts to be tested CS, the other of the two clamping members 4, and then return to the negative electrode of the power supply. In this process, since the bearing member 3 is arranged between the two clamping members 4, the current can pass through the bearing member 3, and the current size is equal everywhere in the same loop. When the second connecting end of the second measuring member is electrically connected to the supporting member 3, a loop is formed between the second measuring member, the supporting member 3 and the cable 200 to be tested, and the voltage measuring instrument can measure the voltage value between the two parts to be tested CS connected to the supporting member 3. Since the current value has been obtained above, the resistance value of the cable 200 to be tested can be calculated by using the voltage value and the current value.

[0044] In this way, the contact between the tested portion CS of the cable 200 and the clamping member 4 is closer, and the contact between the tested portion CS of the cable 200 and the bearing member 3 is closer, making the measured resistance value result more accurate and more reliable. The current value and the voltage value are calculated separately without interfering with each other, further improving the accuracy of the measurement result.

[0045] In some embodiments of the present application, see Figure 1 and Figure 2, and refer to Figure 3 , Figure 3 Shows Figure 1 Schematic diagram of the three-dimensional structure of the carrier 3 in the measuring device 100 in FIG. The measuring device 100 further includes an elastic member 5, the two ends of which are connected to the frame 1 and the carrier 3 respectively; the elastic member 5 is configured so that when the two clamping members 4 move in directions away from each other, the elastic member 5 is compressed along the gravity direction F3; and the elastic member 5 is configured so that when the two clamping members 4 move in directions toward each other, the elastic member 5 is released in a direction opposite to the gravity direction F3. By providing a component of the elastic member 5, the carrier 3 can move in the gravity direction F3 or in a direction opposite to the gravity direction F3 when the two clamping members 4 move in the first direction F1 away from each other or toward each other. The elastic member 5 is not only simple in structure, but also can absorb the impact and vibration that may be generated during operation, thereby extending the service life of the carrier 3, and the elastic member 5 can provide a stable restoring force when being compressed or released, so that the carrier 3 remains stable during movement, thereby making the movement of the carrier 3 more stable. Among them, the elastic member 5 can be set as a spring, a retaining spring, etc.

[0046] In some other embodiments, a guide rail and a controller may be used to implement the method, wherein the guide rail is fixed on the frame 1, and the support member 3 is movably connected to the guide rail along the gravity direction F3, wherein the support member 3 may be regarded as a slider, which can move relative to the guide rail in the gravity direction F3, and the controller may control the support member 3 to move relative to the guide rail along the gravity direction F3 when sensing that the support member 3 is subjected to a force along the gravity direction F3.

[0047] In some embodiments of the present application, continue to refer to Figure 1 , and refer to Figure 4 , Figure 4 Shows Figure 1 Schematic diagram of the three-dimensional structure of the clamping member 4 in the measuring device 100 in FIG. The clamping member 4 includes two clamping parts spaced apart along the second direction F2. Along the second direction F2, the two clamping members 4 are configured to be relatively movable and connected to the frame 1, wherein the first direction F1 is perpendicular to the second direction F2 and the gravity direction F3.

[0048] In this way, the two clamping parts can move relative to each other in the second direction F2 to clamp or release the cable under test 200 in the second direction F2. The relative positions of the two clamping parts in the second direction F2 can be controlled to control the force of clamping the cable under test 200, thereby reducing the risk of damage to the cable under test 200 and extending the service life of the cable under test 200.

[0049] In some embodiments of the present application, continue to refer to Figure 1 , and combined with reference Figure 4The two clamping parts are respectively a first clamping part 41 and a second clamping part 42. The first clamping part 41 includes a first clamping sub-part 411, and the second clamping part 42 includes a second clamping sub-part 421. At least one of the first clamping sub-part 411 and the second clamping sub-part 421 is arranged in plurality along the first direction F1.

[0050] It is understandable that one of the first clamping sub-section 411 and the second clamping sub-section 421 can be set as one, and the other can be set as two at intervals along the first direction F1. It is also possible to set a plurality of the first clamping sub-section 411 and the second clamping sub-section 421 along the first direction F1. In this way, the clamping force between the first clamping sub-section 411 and the cable to be tested 200, and the clamping force between the second clamping sub-section 421 and the cable to be tested 200 can be more evenly distributed, thereby enhancing the stability of the clamping of the cable to be tested 200 and reducing the risk of shaking of the cable to be tested 200 during the measurement process. In addition, compared with setting a first clamping section 41 and a second clamping section 42, multiple first clamping sub-sections 411 or second clamping sub-sections 421 can reduce the pressure on a single clamping contact surface, reduce the risk of damage to the cable to be tested 200, reduce the risk of local overstress, and further improve the accuracy of the resistance value measurement of the cable to be tested 200.

[0051] In some embodiments of the present application, see Figures 1 to 4 The first clamping sub-portion 411 is provided with a first groove C1 along the second direction F2, and the cross-sectional area of ​​the first groove C1 gradually decreases along the direction in which the opening of the first groove C1 points to the bottom of the first groove C1; and the first groove C1 is symmetrically arranged on the central axis of the first groove C1 along the two side walls relative to the gravity direction F3, and the central axis of the first groove C1 is parallel to the second direction F2; and / or, the second clamping sub-portion 421 is provided with a second groove C2 along the second direction F2, and the cross-sectional area of ​​the second groove C2 gradually decreases along the direction in which the opening of the second groove C2 points to the bottom of the second groove C2; ​​and the second groove C2 is symmetrically arranged on the central axis of the second groove C2 along the two side walls relative to the gravity direction F3, and the central axis of the second groove C2 is parallel to the second direction F2.

[0052] In the case where "the first clamping sub-portion 411 is provided with a first groove C1 along the second direction F2, the opening of the first groove C1 points to the direction of the bottom of the first groove C1, the cross-sectional area of ​​the first groove C1 gradually decreases, and the two side walls of the first groove C1 relative to each other along the gravity direction F3 are symmetrically arranged with respect to the central axis of the first groove C1, and the central axis of the first groove C1 is parallel to the second direction F2", when the first clamping sub-portion 411 and the second clamping sub-portion 421 move toward each other along the second direction F2, they can naturally guide the cable to be tested 200 to be gradually placed from the opening of the first groove C1 to the bottom of the groove, and since the space for accommodating the cable to be tested 200 defined by the first groove C1 gradually decreases, the cable to be tested 200 is gradually clamped more tightly, and the clamping process is more stable and gradual.

[0053] Specifically in this application, please refer to Figure 4 The cross section of the first groove C1 in the first direction F1 is substantially V-shaped, and the inner side surface of the first groove C1 is smoothly arranged, so that the cable 200 to be tested is less likely to be worn when in contact with the wall of the first groove C1, thereby extending the service life of the cable 200 to be tested. Moreover, such a design can allow the cable 200 to be tested of different diameters to be adapted, thereby improving the versatility and flexibility of the measuring device 100.

[0054] In the case where "the second clamping sub-portion 421 is provided with a second groove C2 along the second direction F2, and the cross-sectional area of ​​the second groove C2 gradually decreases along the direction from the opening of the second groove C2 to the bottom of the second groove C2; ​​and the second groove C2 has two side walls relative to each other along the gravity direction F3, symmetrically arranged with respect to the central axis of the second groove C2, and the central axis of the second groove C2 is parallel to the second direction F2", similarly, when the first clamping sub-portion 411 and the second clamping sub-portion 421 move toward each other along the second direction F2, they can naturally guide the cable to be tested 200 to be gradually placed from the opening of the second groove C2 to the bottom of the groove. Since the space for accommodating the cable to be tested 200 defined by the second groove C2 gradually decreases, the cable to be tested 200 is gradually clamped more tightly, further improving the stability and gradualness of the clamping process.

[0055] Specifically in this application, please refer to Figure 4 The cross section of the second groove C2 in the first direction F1 is substantially V-shaped, and the inner side surface of the second groove C2 is smoothly arranged, so that the cable 200 to be tested is less likely to be worn when in contact with the wall of the second groove C2, thereby extending the service life of the cable 200 to be tested. Moreover, such a design can allow the cable 200 to be tested of different diameters to be adapted, thereby improving the versatility and flexibility of the measuring device 100.

[0056] In the case where "the first clamping sub-portion 411 is provided with a first groove C1 along the second direction F2, and the cross-sectional area of ​​the first groove C1 gradually decreases along the direction in which the opening of the first groove C1 points to the bottom of the first groove C1; and the first groove C1 is symmetrically arranged on the central axis of the first groove C1 relative to the two side walls along the gravity direction F3, and the central axis of the first groove C1 is parallel to the second direction F2; the second clamping sub-portion 421 is provided with a second groove C2 along the second direction F2, and the cross-sectional area of ​​the second groove C2 gradually decreases along the direction in which the opening of the second groove C2 points to the bottom of the second groove C2; ​​and the cross-sectional area of ​​the second groove C2 gradually decreases along the direction in which the cable 200 is tested, so that the force on the cable 200 is more uniform, thereby reducing the situation in which the cable 200 is locally over-voltage or under-voltage.

[0057] Specifically in the present application, the first groove C1 and the second groove C2 are opened with the same size and shape, which is not only convenient for batch processing and production.

[0058] The above-mentioned "the first clamping sub-portion 411 is provided with a first groove C1 along the second direction F2, and the cross-sectional area of ​​the first groove C1 gradually decreases along the opening of the first groove C1 pointing to the bottom of the first groove C1; and the first groove C1 is symmetrically arranged on the central axis of the first groove C1 along the relative two side walls along the gravity direction F3, and the central axis of the first groove C1 is parallel to the second direction F2" and "the second clamping sub-portion 421 is provided with a second groove C2 along the second direction F2, and the cross-sectional area of ​​the second groove C2 gradually decreases along the opening of the second groove C2 pointing to the bottom of the second groove C2; ​​and the second groove C2 is symmetrically arranged on the central axis of the second groove C2 along the relative two side walls along the gravity direction F3, and the central axis of the second groove C2 is parallel to the second direction F2" can be arbitrarily combined according to actual conditions.

[0059] In some embodiments of the present application, continue to refer to Figure 4 The first clamping sub-portions 411 and the second clamping sub-portions 421 are alternately arranged along the first direction F1.

[0060] In this way, when the first clamping sub-portion 411 and the second clamping sub-portion 421 move toward each other, the first clamping sub-portion 411 and the second clamping sub-portion 421 can be staggered, reducing the risk of the first clamping sub-portion 411 and the second clamping sub-portion 421 colliding and being unable to get closer, thereby being able to adapt to the measurement of the cable 200 under test with a smaller diameter.

[0061] In some embodiments of the present application, continue to refer to Figures 1 to 4, along the first direction F1, a first accommodating space K1 is defined between two adjacent first clamping sub-portions 411, the shape of the first accommodating space K1 is adapted to the second clamping sub-portion 421, and the first accommodating space K1 can accommodate the second clamping sub-portion 421; and / or, along the first direction F1, a second accommodating space K2 is defined between two adjacent second clamping sub-portions 421, the shape of the second accommodating space K2 is adapted to the first clamping sub-portion 411, and the second accommodating space K2 can accommodate the first clamping sub-portion 411.

[0062] In the case of "along the first direction F1, a first accommodating space K1 is defined between two adjacent first clamping sub-sections 411, the shape of the first accommodating space K1 is adapted to the second clamping sub-section 421, and the first accommodating space K1 can accommodate the second clamping sub-section 421", the design of the first accommodating space K1 enables the first clamping sub-section 411 and the second clamping sub-section 421 to smoothly stagger with each other when they move close to each other, thereby optimizing the clamping process and improving the smoothness of the clamping process. The design of the first accommodating space K1 and the second clamping sub-section 421 being adapted in shape increases the stability of the clamping. When measuring the diameter of the cable 200 to be tested, the second clamping sub-section 421 can abut against the wall of the first accommodating space K1, reducing the risk of the second clamping sub-section 421 shaking when moving, thereby improving the clamping reliability of the cable 200 to be tested, and further improving the accuracy of the resistance value detection of the cable 200 to be tested.

[0063] In the case of "along the first direction F1, a second accommodating space K2 is defined between two adjacent second clamping sub-sections 421, the shape of the second accommodating space K2 is adapted to the first clamping sub-section 411, and the second accommodating space K2 can accommodate the first clamping sub-section 411", similarly, the design of the second accommodating space K2 enables the first clamping sub-section 411 and the second clamping sub-section 421 to smoothly stagger with each other when they move close to each other, thereby optimizing the clamping process and improving the smoothness of the clamping process. The design of the second accommodating space K2 being adapted to the shape of the first clamping sub-section 411 increases the stability of the clamping. When measuring the diameter of the cable 200 to be tested, the first clamping sub-section 411 can abut against the wall of the second accommodating space K2, reducing the risk of the first clamping sub-section 411 shaking when moving, thereby improving the clamping reliability of the cable 200 to be tested, and further improving the accuracy of the resistance value detection of the cable 200 to be tested.

[0064] Specifically in this application, continue to refer to Figure 4 The first clamping portion 41 and the second clamping portion 42 are both integrally formed parts, and the structure is more solid, thereby improving the durability of the measuring device 100.

[0065] The above-mentioned “along the first direction F1, a first accommodating space K1 is defined between two adjacent first clamping sub-portions 411, the shape of the first accommodating space K1 is adapted to the second clamping sub-portion 421, and the first accommodating space K1 can accommodate the second clamping sub-portion 421” and “along the first direction F1, a second accommodating space K2 is defined between two adjacent second clamping sub-portions 421, the shape of the second accommodating space K2 is adapted to the first clamping sub-portion 411, and the second accommodating space K2 can accommodate the first clamping sub-portion 411” can be arbitrarily combined according to actual conditions.

[0066] In some embodiments of the present application, continue to refer to Figures 1 to 4 The bearing member 3 is provided with a third groove C3 along the gravity direction F3. Along the gravity direction F3, the cross-sectional area of ​​the third groove C3 gradually decreases, and the third groove C3 is symmetrically arranged along the central axis of the third groove C3 with respect to the two side walls along the second direction F2. The central axis of the third groove C3 is parallel to the weight direction, and the first direction F1 is perpendicular to the second direction F2 and the gravity direction F3.

[0067] In this way, when the first clamping sub-portion 411 and the second clamping sub-portion 421 move toward each other along the second direction F2, the tested portion CS of the tested cable 200 can be naturally guided to be gradually placed from the opening of the third groove C3 to the bottom of the groove, and the space for accommodating the tested cable 200 defined by the third groove C3 is gradually reduced, so that the tested cable 200 is more closely in contact with the carrier 3, so as to further improve the resistance value detection accuracy of the tested cable 200. Specifically in this application, reference can be made to Figure 4 The cross section of the third groove C3 in the second direction F2 is substantially V-shaped, and the inner side of the third groove C3 is smoothly arranged, so that the cable 200 to be tested is less likely to be worn when in contact with the wall of the third groove C3, thereby extending the service life of the cable 200 to be tested. Moreover, such a design can allow the cable 200 to be tested of different diameters to be adapted, thereby improving the versatility and flexibility of the measuring device 100.

[0068] In some embodiments of the present application, continue to refer to Figures 1 to 4 The surface of the bottom of the third groove C3 is a continuous curved surface.

[0069] Each point of the continuous curved surface has a tangent, and the direction of the tangent changes continuously near the point, without abrupt turns, sharp corners or edges, and all transitions are smooth. In this way, the risk of the cable 200 to be tested colliding with the sharp part of the bottom of the third groove C3, which causes the cable 200 to be worn, is reduced, and the contact between the cable 200 to be tested and the bottom of the third groove C3 is more uniform, reducing the measurement error caused by poor contact.

[0070] In some embodiments of the present application, continue to refer to Figures 1 to 4The measuring device 100 also includes a support member 2, which is used to support the insulating portion J of the cable 200 to be tested. The support member 2 can support the insulating portion J of the cable 200 to be tested, especially when the cable 200 to be tested is long, and can support the cable 200 to be tested, thereby reducing the situation where the cable 200 to be tested is affected by gravity and partially sags downward.

[0071] In addition, a pulley may be provided on the frame 1 so that the frame 1 can slide on the ground, which facilitates the measurement device 100 to quickly move to a designated position.

[0072] The measuring device 100 also includes a control panel, which is electrically connected to the above-mentioned bearing member 3, support member 2, clamping member 4 and measuring mechanism. The operator can debug the measuring device 100 by operating the control panel and then measure the resistance value of the cable 200 to be measured.

[0073] For ease of understanding, continue to refer to Figure 1 and Figure 2 , this application briefly describes the operator's operation process of the control panel CTR.

[0074] The first step is to check the external input power supply to see if the cable 200 to be tested is damaged; the second step is to press the power switch on the equipment control panel CTR to power on the measuring device, the power indicator light is on, and the touch screen is powered on and started; the third step is to click the "Start Test" button on the control panel CTR to enter the test interface; the fourth step is to manually adjust the clamping member 4 to clamp or open the cable 200 to be tested by manually operating the operation buttons on the control panel CTR; the fifth step is that the equipment can run fully automatically according to standard requirements to achieve automatic clamping of the two clamping members 4, the "Run Indicator" on the control panel CTR lights up, and then straighten the cable to be tested, and then test the resistance, and the test is completed.

[0075] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A measuring device for measuring the resistance value of a cable to be tested, characterized in that: The cable to be tested comprises a conductive part and an insulating part covering a part of the outer surface of the conductive part, the conductive part not covered by the insulating part and exposed to the outside is a part to be tested, and the cable to be tested has at least four parts to be tested; the measuring device comprises: Frame; Two bearing members, used for bearing two of the at least four to-be-tested parts, wherein the bearing members are configured to be able to move relative to the frame along the gravity direction in response to a force acting along the gravity direction; Two clamping members are arranged on the frame at intervals along a first direction, the two clamping members are respectively used to clamp the other two of the at least four parts to be tested, and along the first direction, the two clamping members are configured to be able to approach each other or move away from each other along the first direction; the first direction is parallel to the central axis direction of the cable to be tested; and The measuring mechanism comprises a first measuring member and a second measuring member, wherein the first measuring member has two first connecting ends, and the two first connecting ends are electrically connected to the two clamping members in a one-to-one correspondence, and the second measuring member has two second connecting ends, and the two second connecting ends are electrically connected to the two bearing members in a one-to-one correspondence; Wherein, along the first direction, the two supporting members are located between the two clamping members.

2. The measuring device according to claim 1, characterized in that The measuring device also includes an elastic member, two ends of which are respectively connected to the frame and the supporting member; the elastic member is configured to be compressed along the direction of gravity when the two clamping members move away from each other along the first direction, and to be released in a direction opposite to the direction of gravity when the two clamping members move toward each other along the first direction.

3. The measuring device according to claim 1, characterized in that The clamping member comprises two clamping parts spaced apart along a second direction; along the second direction, the two clamping parts are configured to be relatively movable and connected to the frame; The first direction, the second direction and the gravity direction are perpendicular to each other.

4. The measuring device according to claim 3, characterized in that The two clamping parts are respectively a first clamping part and a second clamping part; the first clamping part includes a first clamping sub-part, and the second clamping part includes a second clamping sub-part; at least one of the first clamping sub-part and the second clamping sub-part is arranged in plurality along the first direction.

5. The measuring device according to claim 4, characterized in that The first clamping sub-portion is provided with a first groove along the second direction, and the cross-sectional area of ​​the first groove gradually decreases along the direction from the opening of the first groove to the bottom of the first groove; and the two side walls of the first groove which are arranged opposite to each other along the gravity direction are symmetrically arranged on the central axis of the first groove, and the central axis of the first groove is parallel to the second direction; and / or The second clamping sub-portion is provided with a second groove along the second direction, and the cross-sectional area of ​​the second groove gradually decreases along the direction from the opening of the second groove to the bottom of the second groove; and the second groove is symmetrically arranged on the central axis of the second groove with respect to the two side walls along the gravity direction, and the central axis of the second groove is parallel to the second direction.

6. The measuring device according to claim 4, characterized in that The first clamping sub-portions and the second clamping sub-portions are alternately arranged along the first direction.

7. The measuring device according to claim 6, characterized in that Along the first direction, a first accommodating space for accommodating the second clamping sub-section is defined between two adjacent first clamping sub-sections; and / or Along the first direction, a second accommodating space for accommodating the first clamping sub-portion is defined between two adjacent second clamping sub-portions.

8. The measuring device according to any one of claims 1 to 7, characterized in that: The bearing member is provided with a third groove along the direction of gravity; along the direction of gravity, the cross-sectional area of ​​the third groove gradually decreases; and the third groove is symmetrically arranged along the central axis of the third groove on the two side walls relative to each other along the second direction, the central axis of the third groove is parallel to the direction of gravity, and the first direction is perpendicular to the second direction and the direction of gravity.

9. The measuring device according to claim 8, characterized in that The surface of the third groove bottom is a continuous curved surface.

10. The measuring device according to any one of claims 1 to 7, characterized in that The measuring device further comprises a supporting member, and the supporting member is used to support the insulating portion of the cable to be measured.

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