Calibrator and detection device

Abstract

The utility model discloses a calibrator and a detection device, the calibrator is suitable for detecting the measurement precision of an impedance meter, the calibrator comprises a shell, a resistor and a connecting piece, and the resistor has a set resistance value; the connecting piece is provided with a first end and a second end which are connected, the second end is electrically connected with the resistor, and the first end is suitable for being connected with an impedance meter and used for connecting the resistor into a measuring loop of the impedance meter; and the shell covers the resistor and is fixedly connected with the second end. The calibrator provided by the utility model can simplify the calibration operation of the impedance meter, can avoid errors caused by manual measurement, and improves the accuracy of detecting the impedance meter. The detection device with the calibrator also has the advantages.

Description

Technical Field

[0001] The utility model relates to the technical field of impedance detection, in particular to a calibrator and a detection device. Background Art

[0002] When testing finished electronic products, an impedance meter is required to measure the impedance of the finished product. While the meter has standard measurement accuracy when shipped from the factory, over time, the accuracy can deviate from the specified range. Therefore, the meter must be calibrated to ensure reliable measurement results when testing finished products.

[0003] In the related art, a multimeter is used to manually measure the finished standard component to obtain the standard impedance value. The finished standard component is then tested using an impedance meter, and the meter value is adjusted to match the standard impedance value of the standard component, thereby calibrating the meter. This calibration method requires manual testing of the standard component twice, which is cumbersome. Furthermore, the two measurements are subject to errors due to the different measurement methods, making them less accurate. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a calibrator that can simplify the calibration operation of an impedance meter.

[0005] The utility model also provides a detection device with the calibrator.

[0006] The calibrator according to the first embodiment of the present utility model is suitable for detecting the measurement accuracy of an impedance meter, and the calibrator includes: a housing, a resistor, and a connector;

[0007] A resistor having a set resistance value; a connector having a first end and a second end connected to each other, the second end being electrically connected to the resistor, and the first end being suitable for connecting to the impedance meter for connecting the resistor to a measurement circuit of the impedance meter; and a housing covering the outside of the resistor and fixedly connected to the second end.

[0008] The calibrator according to the embodiment of the utility model has at least the following beneficial effects: since the resistor itself has a standard resistance value, it is connected to the resistor through a connector, and the impedance of the resistor on the impedance meter can be directly measured when the connector is connected to the impedance meter, thereby directly determining whether the measurement accuracy of the impedance meter is within the standard range.

[0009] According to some embodiments of the present invention, the connecting member includes a first module, a second module, a third module and a fourth module suitable for connecting the impedance meter, the first module and the second module extend along the first direction to the second end and are electrically connected to one end of the resistor, and the fourth module extends along the first direction to the second end and is electrically connected to an end of the resistor facing away from the connecting member, so that the connecting member, the resistor and the impedance meter form a loop.

[0010] According to some embodiments of the present invention, the first module, the second module, the third module and the fourth module extend along a first direction toward one side of the resistor and have successively decreasing extension lengths, and the first module, the second module, the third module and the fourth module have gradually increasing outer diameters along a second direction; the first direction is perpendicular to the second direction.

[0011] According to some embodiments of the present invention, the calibrator also includes a conductive piece, the shell covers the conductive piece, the conductive piece is connected to the second end and is electrically connected to the resistor, the connecting piece includes a first module and a second module suitable for connecting the impedance meter, the first module and the second module extend to the second end along the first direction, and the conductive piece is connected to the side of the first module and the second module facing the resistor to conduct the first module and the second module to the resistor.

[0012] According to some embodiments of the present invention, the conductive member has a through hole, the first module extends toward one side of the resistor to form a support portion, the support portion is passed through the through hole, and the conductive member abuts against the second module; the conductive member is made of conductive material.

[0013] According to some embodiments of the present invention, the interior of the shell defines a accommodating cavity with an opening, the resistor and the second end are arranged in the accommodating cavity, the second end is connected to the opening and covers the opening; or the shell covers the second end, and the resistor, the connecting piece and the shell are formed as one piece.

[0014] According to some embodiments of the present invention, the connecting member further includes a protrusion, which is formed by extending the outer peripheral wall of the connecting member along the second direction, the protrusion separates the connecting member to form the first end and the second end, and the shell is connected to the side of the protrusion facing the second end.

[0015] According to some embodiments of the present invention, the side of the protrusion facing the second end has an abutment surface, the abutment surface is connected to the outer wall surface of the second end, the shell abuts against the abutment surface, and the inner wall of the shell is connected to the outer wall surface of the second end, and the shell covers the second end.

[0016] According to some embodiments of the present invention, the resistor is a manganese-copper alloy resistor.

[0017] According to the second embodiment of the present invention, the detection device includes:

[0018] Impedance meter, including detection hole;

[0019] In the calibrator described in any of the above embodiments, the connecting member is plugged into the detection hole, and the impedance meter is electrically connected to the resistor through the connecting member.

[0020] The detection device according to the embodiment of the utility model has at least the following beneficial effects: connecting the calibrator to the detection hole can enable the impedance meter to detect the resistor in the calibrator, and comparing the detection value obtained by the impedance meter with the standard value of the resistor to determine whether the measurement accuracy of the impedance meter is within the standard range. If not, the detection value can be adjusted to be consistent with the standard value to calibrate the impedance meter.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 A schematic diagram of a calibrator in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a calibrator in an embodiment of the present invention;

[0025] Figure 3 In the embodiment of the present utility model Figure 2 AA cross-sectional view;

[0026] Figure 4 This is an exploded schematic diagram of a calibrator in an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of a connecting member in an embodiment of the present utility model;

[0028] Figure 6 This is a schematic diagram of a connecting member in an embodiment of the present utility model;

[0029] Figure 7 In the embodiment of the present utility model Figure 6 BB section diagram;

[0030] Figure 8 In the embodiment of the present utility model Figure 7 An enlarged schematic diagram of point C;

[0031] Figure 9 In the embodiment of the present utility model Figure 7 An enlarged schematic diagram of point D;

[0032] Figure 10 This is a schematic diagram of the connection between the connector and the resistor in an embodiment of the present utility model;

[0033] Figure 11 FIG. 1 is a schematic diagram of another embodiment of a calibrator in an embodiment of the present invention.

[0034] Reference numerals:

[0035] Calibrator 100; housing 110; accommodating cavity 111; opening 112; resistor 120; connector 130; first module 131; first extension 1311; support portion 1312; second module 132; second extension 1321; third module 133; third extension 1331; fourth module 134; fourth extension 1341; first gap 135; second gap 136; third gap 137; protrusion 138; first end 1381; second end 1382; abutting surface 1383; barrier 140; conductive member 150; through hole 151; wire 160. DETAILED DESCRIPTION

[0036] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0038] In the description of this utility model, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of the terms "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0041] The following describes a calibrator 100 according to the first embodiment of the present invention with reference to the accompanying drawings. The calibrator 100 is used to calibrate the measurement accuracy of an impedance meter. It should be noted that the first direction is shown in the left-right direction and the second direction is shown in the up-down direction in the accompanying drawings. Figures 1 to 6 As shown, the calibrator 100 includes a housing 110, a resistor 120, and a connector 130. The resistor 120 is connected to the housing 110, and the housing 110 is wrapped around the resistor 120, thereby fixing the resistor 120 inside the housing 110. The resistor 120 is an electronic component with a definite resistance value. The connector 130 has a first end 1381 and a second end 1382 connected to each other, wherein the first end 1381 is used to connect to an impedance meter, and the second end 1382 is connected to the housing 110. The second end 1382 is also electrically connected to the resistor 120. Therefore, when the calibrator 100 is connected to the impedance meter, the impedance meter can be electrically connected to the resistor 120 through the connector 130, thereby realizing the detection of the measurement accuracy of the impedance meter.

[0042] Specifically, since the resistor 120 itself has a certain standard resistance value. When the impedance meter and the calibrator 100 are connected, the impedance meter will measure the impedance of the resistor 120. By comparing the measured resistance value with the standard resistance value of the resistor 120, it can be directly determined whether the measurement accuracy of the impedance meter is within the standard range. Among them, if the measured resistance value is the same as the standard resistance value or is within the error range, it means that the measurement accuracy of the impedance meter is still within the standard range. If the measured resistance value is different from the standard resistance value or deviates from the error range, it means that the measurement accuracy of the impedance meter is not within the standard range, and the impedance meter needs to be calibrated. Compared with the traditional impedance meter calibration method, the calibrator 100 provided in this embodiment does not need to test the standard parts of the finished product twice, which simplifies the impedance meter calibration steps, and also avoids errors and inaccuracies caused by different measurement methods during the test process.

[0043] In some embodiments, see Figures 5 to 9 As shown, the connector 130 includes a first module 131, a second module 132, a third module 133, and a fourth module 134. The first module 131, the second module 132, and the fourth module 134 are electrically connected to the resistor 120. When testing the measurement accuracy of the impedance meter, the first module 131, the second module 132, the third module 133, and the fourth module 134 are used to connect to the impedance meter.

[0044] One end of the first module 131 and the second module 132 is connected to the impedance meter, and the other end extends along the first direction to the second end 1382. This extended portion is electrically connected to one end of the resistor 120, thereby enabling electrical connection between the impedance meter and the resistor 120. Simultaneously, the other end of the resistor 120 (i.e., the end facing away from the connector 130) is connected to the fourth module 134. Since the fourth module 134 is also connected to the impedance meter, once the impedance meter and resistor 120 are electrically connected, the resistor 120 conducts electricity back to the impedance meter through the fourth module 134, thereby forming a measurement loop between the connector 130, the resistor 120, and the impedance meter. The third module 133 is connected only to the impedance meter and is not connected to the resistor 120.

[0045] Specifically, in one embodiment, the first module 131 corresponds to the left channel module, the second module 132 corresponds to the right channel module, the third module 133 corresponds to the microphone module, and the fourth module 134 corresponds to the ground module. The third module 133 is spaced apart from the first module 131, the second module 132, and the fourth module 134. Separating the third module 133 from the other three modules and ensuring that the third module 133 is not connected to the resistor 120 can prevent errors in the test results caused by the third module 133 connecting to the resistor 120 or connecting to the resistor 120 through the other three modules during the test process.

[0046] Further, in this embodiment, see Figure 5 and Figure 8 As shown, the first module 131, the second module 132, the third module 133, and the fourth module 134 are spaced apart in a first direction and a second direction, with the first direction being perpendicular to the second direction. A first gap 135 is formed between the first module 131 and the second module 132, a second gap 136 is formed between the second module 132 and the third module 133, and a third gap 137 is formed between the third module 133 and the fourth module 134. Barriers 140 made of insulating material are placed between the first gap 135, the second gap 136, and the third gap 137. The provision of barrier 140 prevents the third module 133 from electrically connecting to the other three modules, thereby improving the detection accuracy of the calibrator 100. Furthermore, the provision of barrier 140 in the first gap 135 allows the first module 131 and the second module 132 to be tested independently during testing, further improving detection accuracy. In some embodiments, barrier 140 may not be provided between the first module 131 and the second module 132.

[0047] In other embodiments, the positions of the first module 131, the second module 132, the third module 133, and the fourth module 134 can be changed. For example, along the first direction, the four modules can be arranged in the order of the first module 131, the second module 132, the fourth module 134, and the third module 133. It is sufficient that the third module 133 is spaced apart from the other three modules so as not to be connected to the resistor 120 and not to affect the detection of the impedance meter by the other three modules.

[0048] In some embodiments, see Figures 5 to 9As shown, the first module 131, the second module 132, the third module 133, and the fourth module 134 disposed at the second end 1382 extend along the first direction, such that the first module 131, the second module 132, the third module 133, and the fourth module 134 have successively decreasing lengths along the first direction toward the side of the resistor 120. Simultaneously, the first module 131, the second module 132, the third module 133, and the fourth module 134 have gradually increasing outer diameters along the second direction, the first direction being perpendicular to the second direction. Specifically, the first end 1381 of the connector 130 is connected to the impedance meter, and the second end 1382 is connected to the housing 110, wherein, referring to FIG. Figure 3 and Figure 9 As shown, in one example, the example is Figure 9 The middle abutment surface 1383 is the junction between the connector 130 and the housing 110. The first module 131, the second module 132, the third module 133, and the fourth module 134 extend along the first direction from the junction between the connector 130 and the housing 110. The first module 131 is formed with a first extension portion 1311, the second module 132 is formed with a second extension portion 1321, the third module 133 is formed with a third extension portion 1331, and the fourth module 134 is formed with a fourth extension portion 1341. The lengths of the first extension portion 1311, the second extension portion 1321, the third extension portion 1331, and the fourth extension portion 1341 along the first direction decrease in sequence. At the same time, the first extension portion 1311, the second extension portion 1321, the third extension portion 1331 and the fourth extension portion 1341 have outer diameters, and the outer diameters of the first extension portion 1311, the second extension portion 1321, the third extension portion 1331 and the fourth extension portion 1341 increase sequentially in the second direction, so that the first extension portion 1311, the second extension portion 1321, the third extension portion 1331 and the fourth extension portion 1341 are arranged in a stepped structure.

[0049] The step-like structure arrangement makes the processing and packaging of the connector 130 more convenient. Since the connector 130 needs to be connected to the housing 110 and needs to be electrically connected to the resistor 120 through the wire 160. In the conventional processing and packaging method, see Figure 11As shown, the second end 1382 of the connector 130 is cylindrical. The outer diameters of the first, second, third, and fourth modules 131, 132, 133, and 134 increase in order. These modules are located in the same cross-section: the second module 132 encloses the first module 131, the third module 133 encloses the second module 132, and the fourth module 134 encloses the third module 133. During processing, the housing 110 is connected to the outer wall of the connector 130 (i.e., the sidewall of the cylindrical structure). Since the wire 160 needs to conduct electricity from the first and second modules 131, 132 to the resistor 120, it can only be connected to the cross-section of the connector 130 (i.e., the top or bottom surface of the cylindrical structure). However, the cross-section of connector 130 includes a first module 131, a second module 132, a third module 133, and a fourth module 134, resulting in a smaller cross-sectional area for soldering wire 160. This makes soldering wire 160 more difficult and reduces the connection stability of wire 160. Compared to conventional processing and packaging methods, the stepped structure allows wire 160 to be connected to the sidewalls of first and second modules 131, 132, increasing the soldering area and improving the connection stability of wire 160. Furthermore, the stepped structure also acts as a limiter for housing 110, enhancing the connection between connector 130 and housing 110.

[0050] In some embodiments, see Figure 3 、 Figure 4 and Figure 10 As shown, the calibrator 100 further includes a conductive member 150, and the connector 130 includes a first module 131 and a second module 132, with the first module 131 and the second module 132 being separately disposed. Since the first module 131 and the second module 132 need to be electrically connected to an impedance meter during the actual detection and calibration process, separating the first module 131 and the second module 132 can reduce the conduction of current between the first module 131 and the second module 132, thereby improving the detection performance of the calibrator 100. During the connection process, one end of the first module 131 and the second module 132 are connected to the impedance meter, and the other end extends along the first direction to the second end 1382. This extended portion is electrically connected to one end of the resistor 120, thereby enabling the impedance meter to be electrically connected to the resistor 120. The impedance meter is calibrated by detecting the impedance of the resistor 120. Therefore, the impedance meter needs to be connected to the resistor 120 through the first module 131 and the second module 132. The conductive member 150 is connected to one end of the first module 131 and the second module 132 connected to the resistor 120, so that the first module 131 and the second module 132 can be electrically connected to the resistor 120 through the conductive member 150, thereby ensuring that the impedance meter can be connected to the resistor 120.

[0051] In a conventional method of connecting first module 131 and second module 132, when the impedance meter needs to be connected to resistor 120 via first module 131 and second module 132, wires 160 are provided on first module 131 and second module 132, respectively. First module 131 and second module 132 are electrically connected to resistor 120 via wires 160, thereby establishing communication between the impedance meter and resistor 120. Compared to connecting first module 131 and second module 132 to resistor 120 via wires 160, using conductive member 150 can reduce the number of wires 160 in calibrator 100, thereby saving costs. Furthermore, the reduction in wires 160 reduces the internal space of housing 110, making the overall volume of calibrator 100 smaller and the structure more compact.

[0052] In some embodiments, see Figure 3 、 Figure 4 and Figure 10 As shown, the conductive member 150 has a through hole 151. A support portion 1312 is formed on the side of the first module 131 that extends toward the resistor 120. The support portion 1312 is disposed through the through hole 151, and the conductive member 150 abuts the second module 132. The conductive member 150 is made of a conductive material. Specifically, the through hole 151 extends through the conductive member 150 along a first direction, and the support portion 1312 is formed by extending the first module 131 along the first direction. When the conductive member 150 is connected to the first module 131 and the second module 132, the conductive member 150 is connected to the support portion 1312 through the through hole 151. At the same time, the side of the conductive member 150 that faces away from the resistor 120 abuts the second module 132, thereby connecting the first module 131 and the second module 132. The conductive member 150 is made of a conductive material and is connected to the resistor 120 through a wire 160 , so that the first module 131 and the second module 132 are electrically connected to the resistor 120 .

[0053] In some embodiments, see Figures 3 to 6 As shown, the interior of the housing 110 defines a receiving chamber 111, and the resistor 120 and the second end 1382 of the connector 130 are disposed in the receiving chamber 111. The receiving chamber 111 also has an opening 112. When the connector 130 and the housing 110 are connected, the second end 1382 of the connector 130 connects to the opening 112 and seals the opening 112, thereby securing the connector 130 to the housing 110. In another embodiment, the housing 110 is encased around the second end 1382 of the housing 110, and the second ends 1382 of the resistor 120 and the connector 130 are disposed within the housing 110. In this embodiment, the resistor 120, the connector 130, and the housing 110 are integrally formed, thereby further improving the overall connection strength of the calibrator 100.

[0054] In some embodiments, see Figure 2 、 Figure 3 and Figure 9 As shown, connector 130 also includes a raised portion 138, which extends from the outer wall of connector 130 along the second direction. Raised portion 138 separates connector 130, forming a first end 1381 and a second end 1382. First end 1381 is suitable for connecting to an impedance meter, and housing 110 is connected to the side of raised portion 138 facing second end 1382. Specifically, raised portion 138 surrounds the outer wall of connector 130 and is configured to abut against the impedance meter. When calibrator 100 is calibrating an impedance meter, calibrator 100 needs to be plugged into the impedance meter to electrically connect with it. First end 1381 of connector 130 is plugged into the impedance meter until raised portion 138 abuts the meter, ensuring normal insertion and removal of calibrator 100 and the meter, preventing poor contact between the calibrator 100 and the meter, which could affect the meter's calibration.

[0055] Further, see Figure 3 and Figure 9 As shown, the resistor 120 and the housing 110 are connected at the second end 1382. The side of the protrusion 138 facing the second end 1382 has an abutment surface 1383. The abutment surface 1383 is connected to the outer wall of the second end 1382, and the abutment surface 1383 and the outer wall of the second end 1382 form an abutment structure. The housing 110 is connected and fixed to the abutment structure. The abutment structure can limit the housing 110 and prevent it from moving toward the first end 1381 during the insertion and removal of the calibrator 100. The housing 110 abuts the abutment surface 1383, and the inner wall of the housing 110 is connected to the outer wall of the second end 1382, so that the housing 110 can cover the second end 1382. In this embodiment, the housing 110 and the abutment structure are connected and fixed by glue. In other embodiments, the housing 110 can also be connected to the abutment structure by a snap connection or a threaded connection.

[0056] In some embodiments, resistor 120 is specifically a manganese copper alloy resistor. Manganese copper is an extremely pressure-sensitive material, and resistors 120 made of manganese copper have the advantages of high stability and high precision. Therefore, using manganese copper alloy resistors 120 can improve the calibration accuracy of the impedance meter. In other embodiments, resistor 120 can be other types, such as wirewound resistors 120, constantan resistors 120, or other precision resistors, as long as resistor 120 can be used to calibrate the impedance meter.

[0057] The following describes a detection device according to the first embodiment of the present invention with reference to the accompanying drawings. The detection device is used to perform impedance testing on finished electronic products, which may include but are not limited to headphones, speakers, or phones. Figures 1 to 10 As shown, the detection device includes an impedance meter and a calibrator 100 according to any of the above embodiments. The impedance meter is provided with a detection hole suitable for connecting to a connector 130 on the calibrator 100 or an electronic product, so that the impedance meter can perform impedance detection on the calibrator 100 or the electronic product. When the impedance meter needs to be calibrated, the connector 130 needs to be inserted into the detection hole so that the impedance meter can be electrically connected to the resistor 120 through the connector 130. The impedance meter detects the resistor 120 and generates a detection value. By comparing the detection value with the impedance value of the resistor 120 itself, the user can determine whether the measurement accuracy of the impedance meter is within the standard range.

[0058] As an example, the detection device can be used to detect headphones. Specifically, when it is necessary to perform impedance detection on the finished product of the headphones, the impedance meter needs to be calibrated first. At this time, the connecting part of the calibrator 100 is plugged into the detection hole of the impedance meter. Since the resistor 120 on the calibrator 100 itself has impedance, and the impedance is a known value, when the impedance meter and the calibrator 100 are connected, the impedance meter will detect the resistor 120 and generate a detection value. By comparing the detection value with the impedance value of the resistor 120 itself, if the detection value and the impedance value are the same or within a certain error range, it means that the measurement accuracy of the impedance meter is still within the standard range; if the detection value and the impedance value are different or not within the error range, it means that the measurement accuracy of the impedance meter deviates from the specified accuracy range, and the impedance meter needs to be calibrated. At this time, it is necessary to adjust the detection value of the impedance meter to be consistent with the impedance value of the resistor 120 to complete the calibration of the impedance meter. After the calibration operation is completed, the calibrator 100 and the impedance meter are separated, and the earphones are connected to the detection hole of the impedance meter to determine whether the impedance value of the earphones meets the requirements, so as to screen out unqualified finished products for reprocessing.

[0059] The detection device provided by the present invention connects the calibrator 100 to the detection hole so that the impedance meter can detect the resistor 120 in the calibrator 100, and compares the detection value obtained by the impedance meter with the standard value of the resistor 120 to determine whether the measurement accuracy of the impedance meter is within the standard range. This simplifies the operating steps in the impedance detection process and improves the accuracy and test efficiency of the impedance test of electronic products.

[0060] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. In addition, the embodiments of the present invention and the features of the embodiments can be combined with each other unless there is a conflict.

Claims

1. A calibrator suitable for checking the measuring accuracy of an impedance meter, characterized in that: The calibrator comprises: a resistor having a set resistance value; a connector having a first end and a second end connected to each other, the second end being electrically connected to the resistor, and the first end being suitable for connecting to the impedance meter for connecting the resistor to a measurement circuit of the impedance meter; The housing is covered on the outside of the resistor and is fixedly connected to the second end.

2. The calibrator according to claim 1, wherein The connecting member includes a first module, a second module, a third module and a fourth module suitable for connecting the impedance meter. The first module and the second module extend along the first direction to the second end and are electrically connected to one end of the resistor. The fourth module extends along the first direction to the second end and is electrically connected to an end of the resistor facing away from the connecting member, so that the connecting member, the resistor and the impedance meter form a loop.

3. The calibrator according to claim 2, characterized in that The first module, the second module, the third module and the fourth module extend along a first direction toward one side of the resistor and have successively decreasing extension lengths, and the first module, the second module, the third module and the fourth module have gradually increasing outer diameters along a second direction; the first direction is perpendicular to the second direction.

4. The calibrator according to claim 1, wherein: The calibrator also includes a conductive piece, the shell covers the conductive piece, the conductive piece is connected to the second end and is electrically connected to the resistor, the connecting piece includes a first module and a second module suitable for connecting to the impedance meter, the first module and the second module extend to the second end along the first direction, and the conductive piece is connected to the side of the first module and the second module facing the resistor to conduct the first module and the second module to the resistor.

5. The calibrator according to claim 4, characterized in that The conductive member has a through hole, and the first module extends toward the side of the resistor to form a support portion, the support portion is penetrated by the through hole, and the conductive member abuts against the second module; the conductive member is made of conductive material.

6. The calibrator according to claim 1, wherein: The interior of the shell defines a accommodating cavity with an opening, the resistor and the second end are arranged in the accommodating cavity, the second end is connected to the opening and covers the opening; or the shell covers the second end, and the resistor, the connecting member and the shell are formed as one piece.

7. The calibrator according to claim 1, wherein: The connector further includes a protrusion, which is formed by extending the outer peripheral wall of the connector along the second direction. The protrusion separates the connector to form the first end and the second end, and the shell is connected to the side of the protrusion facing the second end.

8. The calibrator according to claim 7, characterized in that The protrusion has a contact surface on one side facing the second end, the contact surface is connected to the outer wall of the second end, the shell contacts the contact surface, and the inner wall of the shell is connected to the outer wall of the second end, and the shell covers the second end.

9. The calibrator according to claim 1, wherein: The resistor is a manganese-copper alloy resistor.

10. The detection device is characterized in that include: Impedance meter, including detection hole; The calibrator according to any one of claims 1 to 9, wherein the connector is plugged into the detection hole, and the impedance meter is electrically connected to the resistor through the connector.

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