Open circuit and short circuit detection device and electronic equipment

Abstract

The utility model discloses an open circuit and short circuit detection device and electronic equipment. The open circuit and short circuit detection device comprises a radio frequency signal generation module, a first inductor, a first metal sheet and a second metal sheet, the first metal sheet and the second metal sheet are respectively connected with the first end and the second end of the detected unit; the first end of the radio frequency signal generation module is connected with the first end of the first inductor, the second end of the radio frequency signal generation module is connected with the second end of the first inductor, and the radio frequency signal generation module is used for transmitting a first radio frequency signal to the first inductor; the first inductor is used for feeding back the open-circuit and short-circuit state between the first end and the second end of the detected unit. The utility model solves the problem of low measurement accuracy caused by unstable wire connection in the prior art, and has the advantages of no need of contact, high accuracy and strong real-time performance.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency technology, and in particular to an open-circuit and short-circuit detection device and electronic equipment. Background Technology

[0002] In modern electronic equipment and power systems, open-circuit and short-circuit detection technologies ensure the safety and reliability of the equipment.

[0003] In existing technologies, multimeters are typically used for open-circuit and short-circuit testing. However, using a multimeter for open-circuit and short-circuit testing requires connecting the two ends of the multimeter to the device under test via wires. If the wire connections are unstable, it will lead to inaccurate measurement results. Utility Model Content

[0004] This invention provides an open-circuit and short-circuit detection device and electronic equipment to solve the problem of low accuracy caused by unstable wire connections during open-circuit and short-circuit detection.

[0005] According to one aspect of the present invention, an open-circuit and short-circuit detection device is provided, the open-circuit and short-circuit detection device comprising: a radio frequency signal generation module, a first inductor, a first metal sheet, and a second metal sheet;

[0006] The first metal sheet and the second metal sheet are respectively connected to the first end and the second end of the unit under test; the first end of the radio frequency signal generation module is connected to the first end of the first inductor, and the second end of the radio frequency signal generation module is connected to the second end of the first inductor. The radio frequency signal generation module is used to transmit a first radio frequency signal to the first inductor; the first inductor is used to provide feedback on the open circuit and short circuit status between the first end and the second end of the unit under test.

[0007] According to another aspect of the present invention, an electronic device is provided, including the open-circuit and short-circuit detection device described in any of the above embodiments.

[0008] The technical solution of this utility model embodiment solves the problem of low measurement accuracy caused by unstable wire connections in the prior art. It has the advantages of no contact, high accuracy and strong real-time performance.

[0009] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the structure of an open-circuit and short-circuit detection device provided in an embodiment of the present utility model;

[0012] Figure 2 A schematic diagram of another open-circuit and short-circuit detection device provided in this embodiment of the present invention;

[0013] Figure 3 A schematic diagram of another open-circuit and short-circuit detection device provided in this embodiment of the present invention;

[0014] Figure 4 This is a schematic diagram of another open-circuit and short-circuit detection device provided in an embodiment of the present invention. Detailed Implementation

[0015] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0016] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0017] Figure 1This is a schematic diagram of an open-circuit and short-circuit detection device provided in an embodiment of the present invention. This embodiment is applicable to achieving non-contact open-circuit and short-circuit detection. Figure 1 As shown, the open / short circuit detection device includes: a radio frequency signal generation module 110, a first inductor 120, a first metal piece 130, and a second metal piece 140; the first metal piece 130 and the second metal piece 140 are respectively connected to the first end and the second end of the unit under test 150; the first end of the radio frequency signal generation module 110 is connected to the first end of the first inductor 120, and the second end of the radio frequency signal generation module 110 is connected to the second end of the first inductor 120; the radio frequency signal generation module 110 is used to transmit a first radio frequency signal to the first inductor 120; the first inductor 120 is used to provide feedback on the open / short circuit status between the first end and the second end of the unit under test 150.

[0018] Specifically, the radio frequency signal generation module 110 refers to a module used to generate a specific radio frequency signal. For example, the radio frequency signal generation module 110 generates a first radio frequency signal and sends it to the first inductor 120 to monitor the open / short circuit state of the unit under test 150. The first radio frequency signal refers to an electrical signal of a specific frequency generated by the radio frequency signal generation module 110.

[0019] The unit under test 150 refers to the specific electrical component or circuit that needs to be tested. For example, the unit under test 150 may be a circuit board, sensor, connector, wire, or other electronic device. The first metal sheet 130 refers to a sheet-like conductor made of metal. The second metal sheet 140 refers to another sheet-like conductor made of metal. When the first inductor 120 approaches the first metal sheet 130 and the second metal sheet 140, the change in the electromagnetic field can induce eddy currents within the metal sheets. The generation of eddy currents causes a change in the amplitude of the first radio frequency signal. By monitoring the degree of change in the amplitude of the first radio frequency signal, the open-circuit or short-circuit state of the first and second terminals of the unit under test 150 can be detected.

[0020] In this embodiment of the invention, a first radio frequency (RF) signal is transmitted through the first inductor 120. If a short circuit occurs between the first and second terminals of the unit under test 150, eddy currents can form a circulation between the first metal sheet 130 and the second metal sheet 140, thereby absorbing a large amount of RF signal energy and causing a significant decrease in the amplitude of the first RF signal on the first inductor 120. If an open circuit occurs between the first and second terminals of the unit under test 150, i.e., the first metal sheet 130 and the second metal sheet 140 are disconnected, although the metal sheets themselves can induce a certain amount of eddy current, the intensity of the eddy current is small because the first metal sheet 130 and the second metal sheet 140 are not connected, and this will not cause a significant attenuation of the first RF signal. Therefore, by detecting changes in the first RF signal on the first inductor 120, the open / short circuit state between the first and second terminals of the unit under test 150 can be reflected.

[0021] The technical solution of this utility model embodiment solves the problem of low measurement accuracy caused by unstable wire connections in the prior art. It has the advantages of no contact, high accuracy and strong real-time performance.

[0022] Based on the above embodiments, see below. Figure 1 Optionally, the distance between the first inductor 120 and the first metal sheet 130 and the second metal sheet 140 is less than or equal to a first preset distance.

[0023] For example, the first preset distance can be 0 cm, 10 cm, or 20 cm, etc. Among them, if the first preset distance is 0 cm, that is, the first inductor 120 is in direct contact with the first metal plate 130 and the second metal plate 140, in this case, if there is a short circuit between the first end and the second end of the unit under test 150, the first radio frequency signal on the first inductor 120 will attenuate most significantly; if there is an open circuit between the first end and the second end of the unit under test 150, the first radio frequency signal on the first inductor 120 will hardly attenuate.

[0024] In this embodiment of the invention, the radio frequency signal attenuates with increasing distance during propagation. The distance between the first inductor 120 and the first metal plate 130 and the second metal plate 140, within a first preset distance, ensures that the intensity of the radio frequency signal can generate eddy currents in the first metal plate 130 and the second metal plate 140, thereby ensuring the accuracy of the detection results. Furthermore, controlling the distance between the first inductor 120 and the first metal plate 130 and the second metal plate 140 within the first preset distance reduces the impact of external electromagnetic interference on the radio frequency signal, thereby improving signal clarity and reliability.

[0025] Figure 2 This is a schematic diagram of another open-circuit and short-circuit detection device provided as an embodiment of the present invention. Based on the above embodiments, as follows... Figure 2As shown, optionally, the radio frequency signal generation module 110 includes: a signal receiving unit 111, a control unit 112, and a signal attenuation unit 113; the first end of the signal receiving unit 111 is connected to the third end of the control unit 112, and the second end of the signal receiving unit 111 is connected to the fourth end of the control unit 112, and the signal receiving unit 111 is used to receive a second radio frequency signal; the first end of the control unit 112 is connected to the first end of the first inductor 120, and the second end of the control unit 112 is connected to the second end of the first inductor 120, and the amplitude of the radio frequency signal on the first inductor 120 is fed back to the open-circuit and short-circuit state between the first end and the second end of the tested unit 150; the signal attenuation unit 113 is connected between the first end of the signal receiving unit 111 and the first end of the first inductor 120, and the signal attenuation unit 113 is used to attenuate the second radio frequency signal into a first radio frequency signal.

[0026] Specifically, the second radio frequency signal refers to the radio frequency signal emitted by the radio frequency signal transmitter. The signal receiving unit 111 is capable of receiving the second radio frequency signal emitted by the radio frequency signal transmitter. The control unit 112 is a unit used to process the second radio frequency signal received from the signal receiving unit 111 and capable of determining the open or short circuit state between the first and second terminals of the unit under test 150 based on the amplitude change of the first radio frequency signal on the first inductor 120.

[0027] The signal attenuation unit 113 refers to an attenuator used to attenuate the second radio frequency signal into a first radio frequency signal. For example, the signal attenuation unit 113 attenuates the amplitude of the second radio frequency signal received by the signal receiving unit 111 to obtain the first radio frequency signal. By appropriately attenuating the amplitude of the radio frequency signal through the signal attenuation unit 113, the clarity and stability of the radio frequency signal can be improved, thereby improving the overall detection performance.

[0028] In this embodiment of the invention, the signal attenuation unit 113 can attenuate the second radio frequency signal to the first radio frequency signal. If the first and second terminals of the unit under test 150 are open-circuited, when the first inductor 120 approaches the unit under test 150, the eddy currents in the first metal sheet 130 and the second metal sheet 140 cannot form a circulating current, and the amplitude of the first radio frequency signal will not change significantly. If the first and second terminals of the unit under test 150 are short-circuited, that is, the first metal sheet 130 and the second metal sheet 140 are connected, the eddy currents in the two metal sheets can form a circulating current, causing the amplitude of the first radio frequency signal on the first inductor 120 to be significantly attenuated. The control unit 112 can determine the open-circuit and short-circuit state between the first and second terminals of the unit under test 150 by detecting the amplitude attenuation of the first radio frequency signal on the first inductor 120.

[0029] The technical solution of this utility model embodiment uses a signal attenuation unit to attenuate the second radio frequency signal into a first radio frequency signal. By detecting the degree of attenuation of the radio frequency signal amplitude on the first inductor, the open circuit and short circuit status between the first and second terminals of the unit under test are determined, which effectively improves the accuracy and stability of the open circuit and short circuit detection device.

[0030] Figure 3 This is a schematic diagram of another open-circuit and short-circuit detection device provided as an embodiment of the present invention. Based on the above embodiments, as follows... Figure 3 As shown, optionally, the radio frequency signal generation module 110 includes: a signal receiving unit 111 and a control unit 112; the control unit 112 integrates a signal attenuation unit 113; the first end of the signal receiving unit 111 is connected to the third end of the control unit 112, and the second end of the signal receiving unit 111 is connected to the fourth end of the control unit 112, and the signal receiving unit 111 is used to receive a second radio frequency signal; the first end of the control unit 112 is connected to the first end of the first inductor 120, and the second end of the control unit 112 is connected to the second end of the first inductor 120, and the control unit 112 is used to attenuate the second radio frequency signal into a first radio frequency signal.

[0031] In this embodiment of the utility model, the control unit 112 may integrate a signal attenuation unit 113. For example, the signal attenuation unit 113 is connected to the first end of the signal receiving unit 111 and the first end of the first inductor 120 inside the control unit 112, respectively, to attenuate the second radio frequency signal into the first radio frequency signal.

[0032] The technical solution of this utility model embodiment, by integrating the signal attenuation unit 113 into the control unit 112, can effectively reduce the size of the open-circuit and short-circuit device and reduce manufacturing and assembly costs.

[0033] Based on the above embodiments, see below. Figure 2 Optionally, the signal receiving unit 111 includes a second inductor 114; the first end of the second inductor 114 is connected to the third end of the control unit 112, and the second end of the second inductor 114 is connected to the fourth end of the control unit 112.

[0034] In this embodiment of the invention, due to the electromagnetic induction of the inductor, the second inductor 114 is able to couple to the second radio frequency signal emitted by the radio frequency signal source.

[0035] Based on the above embodiments, see below. Figure 2Optionally, the control unit 112 includes: a first radio frequency chip 115, a first terminal of the first radio frequency chip 115 connected to a first terminal of the first inductor 120, a second terminal of the first radio frequency chip 115 connected to a second terminal of the first inductor 120, a third terminal of the first radio frequency chip 115 connected to a first terminal of the second inductor 114, and a fourth terminal of the first radio frequency chip 115 connected to a second terminal of the second inductor 114; the first terminal of the first radio frequency chip 115 is used to transmit a third radio frequency signal and a fourth radio frequency signal, the third radio frequency signal being used to indicate an open circuit between the first terminal and the second terminal of the unit under test 150, and the fourth radio frequency signal being used to indicate a short circuit between the first terminal and the second terminal of the unit under test 150.

[0036] Specifically, the first radio frequency chip 115 refers to an integrated circuit component used for generating, receiving, and modulating radio frequency signals. The first radio frequency chip 115 is capable of generating radio frequency signals of specific frequencies, such as a third radio frequency signal and a fourth radio frequency signal, for indicating the state of the unit under test 150. For example, the third radio frequency signal may be high-level, and the fourth radio frequency signal may be low-level.

[0037] In this embodiment of the utility model, the first radio frequency chip 115 can determine the open circuit or short circuit state of the tested unit 150 based on the amplitude attenuation of the first radio frequency signal on the first inductor 120. If it is open, it transmits a third radio frequency signal; if it is short, it transmits a fourth radio frequency signal.

[0038] Based on the above embodiments, see below. Figure 2 Optionally, the open / short circuit detection device further includes: a radio frequency receiving module 160; the distance between the radio frequency receiving module 160 and the radio frequency signal generating module 110 is less than or equal to a second preset distance, and the radio frequency receiving module 160 is used to receive the open / short circuit status signal emitted by the radio frequency signal generating module 110.

[0039] Specifically, the RF receiving module 160 refers to an electronic component or circuit used to receive RF signals. For example, the RF receiving module 160 may be a reader. The second preset distance refers to a pre-defined maximum distance between the RF receiving module 160 and the RF signal generating module 110. Within this second preset distance, the RF receiving module 160 can accurately and reliably receive the open / short circuit status signal emitted by the RF signal generating module 110. The open / short circuit status signal refers to a signal emitted by the RF signal generating module 110 indicating an open / short circuit between the first and second terminals of the unit under test 150. For example, the open / short circuit status signal includes a third RF signal and a fourth RF signal.

[0040] In this embodiment of the present invention, the radio frequency receiving module 160 can be used to receive the third radio frequency signal or the fourth radio frequency signal emitted by the radio frequency signal generating module 110, and decode the third radio frequency signal or the fourth radio frequency signal to identify the open circuit or short circuit state of the unit under test 150.

[0041] The technical solution of this utility model embodiment receives the open circuit status signal transmitted by the radio frequency signal generation module through the radio frequency receiving module, and decodes and identifies the open circuit and short circuit status of the unit under test. This reduces the error of human judgment, ensures the accuracy of status identification, and thus reduces the risk of failure of the unit under test.

[0042] Figure 4 This is a schematic diagram of another open-circuit and short-circuit detection device provided as an embodiment of the present invention. Based on the above embodiments, as follows... Figure 4 As shown, optionally, the tested unit 150 includes: a third inductor 151 and a second radio frequency chip 152; the first end of the second radio frequency chip 152 is connected to the first metal plate 130, and the second end of the second radio frequency chip 152 is connected to the second metal plate 140; the first end of the third inductor 151 is connected to the third end of the second radio frequency chip 152, and the second end of the third inductor 151 is connected to the fourth end of the second radio frequency chip 152; the third inductor 151 is used to receive the second radio frequency signal.

[0043] Specifically, the second radio frequency chip 152 refers to the integrated circuit component in the unit under test 150 used for generating, receiving and modulating radio frequency signals. The second radio frequency chip 152 is used to process the second radio frequency signal received by the third inductor 151.

[0044] In this embodiment of the invention, if the first and second terminals of the second RF chip 152 are open-circuited, the eddy currents on the first metal plate 130 and the second metal plate 140 cannot form a circulating current, resulting in a small impact on the first RF signal and no significant attenuation of the amplitude of the first RF signal on the first inductor 120. If the first and second terminals of the second RF chip 152 are short-circuited, the eddy currents on the first metal plate 130 and the second metal plate 140 can form a circulating current, resulting in a significant attenuation of the amplitude of the first RF signal on the first inductor 120. The first RF chip 115 can determine the open-circuit or short-circuit state between the first and second terminals of the second RF chip 152 by detecting the amplitude attenuation of the first RF signal on the first inductor 120.

[0045] Based on the above embodiments, see below. Figure 4Optionally, the second RF chip 152 integrates a first current source 153, which is connected to the first end of the second RF chip 152 and is used to output a first level; the second end of the second RF chip 152 is connected to the ground terminal 154.

[0046] Specifically, the first current source 153 refers to an electronic component or circuit that can provide a stable current and output a first level.

[0047] In this embodiment of the invention, if the first and second terminals of the second RF chip 152 are open-circuited, the current output by the first current source 153 cannot flow to the second terminal of the second RF chip 152, and the eddy currents on the first metal plate 130 and the second metal plate 140 cannot flow either, resulting in a small change in the amplitude of the first RF signal on the first inductor 120. If the first and second terminals of the second RF chip 152 are short-circuited, the eddy currents on the first metal plate 130 and the second metal plate 140 can form a circulating current. Furthermore, since the second metal plate 140 is grounded, the magnetic field generated by the first inductor 120 can be closed through the grounding loop, and the change in the magnetic field is guided back to the ground instead of spreading outward, thereby reducing the intensity of the magnetic field radiated outward by the first inductor 120. In this case, the amplitude of the first RF signal on the first inductor 120 will be significantly attenuated or even disappear.

[0048] The technical solution of this utility model embodiment can determine the open / short circuit state between the first and second terminals of the second RF chip by detecting the change in the amplitude of the first RF signal on the first inductor. Since the second terminal of the second RF chip is connected to the ground terminal, if there is a short circuit between the first and second terminals of the second RF chip, the amplitude of the first RF signal will be significantly attenuated or even disappear when the first inductor is brought close. This utility model has the advantages of high accuracy, no contact required, and strong real-time performance.

[0049] The electronic device provided in this embodiment of the present invention includes the open circuit and short circuit detection device provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the open circuit and short circuit detection device.

[0050] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0051] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An open-circuit and short-circuit detection device, characterized in that, The open-circuit and short-circuit detection device includes: a radio frequency signal generation module, a first inductor, a first metal sheet, and a second metal sheet; The first metal sheet and the second metal sheet are respectively connected to the first end and the second end of the unit under test; the first end of the radio frequency signal generation module is connected to the first end of the first inductor, and the second end of the radio frequency signal generation module is connected to the second end of the first inductor. The radio frequency signal generation module is used to transmit a first radio frequency signal to the first inductor; the first inductor is used to provide feedback on the open circuit and short circuit status between the first end and the second end of the unit under test.

2. The open-circuit and short-circuit detection device according to claim 1, characterized in that, The distance between the first inductor and the first and second metal sheets is less than or equal to a first preset distance.

3. The open-circuit and short-circuit detection device according to claim 1, characterized in that, The radio frequency signal generation module includes: a signal receiving unit, a control unit, and a signal attenuation unit; The first end of the signal receiving unit is connected to the third end of the control unit, and the second end of the signal receiving unit is connected to the fourth end of the control unit. The signal receiving unit is used to receive the second radio frequency signal. The first end of the control unit is connected to the first end of the first inductor, and the second end of the control unit is connected to the second end of the first inductor. The amplitude of the radio frequency signal on the first inductor provides feedback on the open-circuit and short-circuit status between the first end and the second end of the unit under test. The signal attenuation unit is connected between the first end of the signal receiving unit and the first end of the first inductor, and the signal attenuation unit is used to attenuate the second radio frequency signal into the first radio frequency signal.

4. The open-circuit and short-circuit detection device according to claim 1, characterized in that, The radio frequency signal generation module includes: a signal receiving unit and a control unit; the control unit integrates a signal attenuation unit. The first end of the signal receiving unit is connected to the third end of the control unit, and the second end of the signal receiving unit is connected to the fourth end of the control unit. The signal receiving unit is used to receive the second radio frequency signal. The first terminal of the control unit is connected to the first terminal of the first inductor, and the second terminal of the control unit is connected to the second terminal of the first inductor. The control unit is used to attenuate the second radio frequency signal into the first radio frequency signal.

5. The open-circuit and short-circuit detection device according to claim 3, characterized in that, The signal receiving unit includes a second inductor; a first end of the second inductor is connected to a third end of the control unit, and a second end of the second inductor is connected to a fourth end of the control unit.

6. The open-circuit and short-circuit detection device according to claim 5, characterized in that, The control unit includes: a first radio frequency chip, a first terminal of the first radio frequency chip being connected to a first terminal of the first inductor, a second terminal of the first radio frequency chip being connected to a second terminal of the first inductor, a third terminal of the first radio frequency chip being connected to a first terminal of the second inductor, and a fourth terminal of the first radio frequency chip being connected to a second terminal of the second inductor. The first terminal of the first radio frequency chip is used to transmit a third radio frequency signal and a fourth radio frequency signal. The third radio frequency signal is used to indicate an open circuit between the first terminal and the second terminal of the unit under test, and the fourth radio frequency signal is used to indicate a short circuit between the first terminal and the second terminal of the unit under test.

7. The open-circuit and short-circuit detection device according to claim 1, characterized in that, The open-circuit and short-circuit detection device further includes: a radio frequency receiving module; The distance between the radio frequency receiving module and the radio frequency signal generating module is less than or equal to a second preset distance, and the radio frequency receiving module is used to receive the open circuit and short circuit status signals emitted by the radio frequency signal generating module.

8. The open-circuit and short-circuit detection device according to claim 3, characterized in that, The unit under test includes: a third inductor and a second radio frequency chip; The first end of the second radio frequency chip is connected to the first metal plate, and the second end of the second radio frequency chip is connected to the second metal plate; The first end of the third inductor is connected to the third end of the second RF chip, and the second end of the third inductor is connected to the fourth end of the second RF chip; the third inductor is used to receive the second RF signal.

9. The open-circuit and short-circuit detection device according to claim 8, characterized in that, The second RF chip integrates a first current source, which is connected to a first terminal of the second RF chip and is used to output a first level; the second terminal of the second RF chip is connected to a ground terminal.

10. An electronic device, characterized in that, Includes the open-circuit and short-circuit detection device according to any one of claims 1-9.

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