Multi-line open circuit detection device
By designing a multi-line open circuit detection device, using DC-DC power supply unit, high-level control switch unit, level acquisition unit and microcontroller, the problem of low data line quality detection efficiency in the prior art is solved, and the multi-to-multiple Efficient detection of lines.
Patent Information
- Application Number
- CN202323514096.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2033-12-21
AI Technical Summary
When mass-producing multiple data lines, it is difficult for the existing technology to efficiently realize data line quality inspection, and the testing process is cumbersome, low efficiency and high cost.
Design a multi-line open circuit detection device, including a DC-DC power supply unit, multiple sets of high-level control switch units, level acquisition unit and microcontroller, and collect levels by setting multiple detection points on each line. Determine whether there is an open point and realize batch detection of multiple lines.
It improves the efficiency of open line detection, simplifies the detection process, reduces costs, and realizes the ability to detect multiple lines simultaneously.
Smart Images
Figure CN222461652U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of line detection, in particular to a multi-line open circuit detection device. Background Art
[0002] Linear electronic accessories such as data cables are usually tested before leaving the factory, such as bending tests, to detect the quality and service life of the product. Conventional testing methods can only test a single wire, and the testing process is cumbersome, inefficient and costly.
[0003] Therefore, when mass-producing multiple data cables, how to efficiently implement quality inspection of the data cables is a technical problem that needs to be solved. Utility Model Content
[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a multi-line open circuit detection device, which can simultaneously perform batch detection on open circuit points in multiple lines and improve the line open circuit detection efficiency.
[0005] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:
[0006] The present application relates to a multi-line open circuit detection device, which is used to perform open circuit detection on multiple lines. The multi-line open circuit detection device includes:
[0007] A DC-DC power supply unit having a DC power input terminal and a DC power output terminal, wherein an output voltage output by the DC power output terminal is lower than an input voltage input by the DC power input terminal;
[0008] A plurality of groups of high-level control switch units, one group of high-level control switch units corresponds to one line and includes a plurality of high-level control switch units corresponding to a plurality of detection points on one line, a free end of one line is connected to the input voltage, a plurality of detection points are arranged in sequence along one line from the free end, a control end of each of the high-level control switches in each group is respectively connected to each detection point, one end of each high-level control switch is respectively grounded and the other end is respectively connected to the output voltage;
[0009] A level acquisition unit, comprising a plurality of level acquisition terminals, the number of which is the same as the number of all detection points in the plurality of lines, and the level acquisition terminals are correspondingly connected to the other end of the high level control switch unit;
[0010] A microcontroller is connected to the level acquisition unit.
[0011] In some embodiments of the present application, the level acquisition unit includes:
[0012] A plurality of level acquisition subunits, the number of which is the same as the number of the plurality of lines, the level acquisition subunit having a plurality of level acquisition ports corresponding to one line, the number of the plurality of level acquisition ports being the same as the number of the plurality of detection points on the one line, the level acquisition ports of the plurality of level acquisition subunits forming a plurality of level acquisition terminals.
[0013] In some embodiments of the present application, the high-level control switch unit is an NMOS tube, the gate of the NMOS tube is connected to the detection point, the source is grounded, and the drain is respectively connected to the output voltage and the level collection terminal.
[0014] In some embodiments of the present application, the DC-DC power supply unit has multiple DC power input terminals and multiple DC power output terminals;
[0015] The number of the multiple DC power input terminals is equal to the number of the multiple DC power output terminals and is greater than or equal to the number of the multiple lines;
[0016] A DC power input terminal corresponds to a DC power output terminal, and a free end of a line is connected to the DC power input terminal, and the other ends of multiple high-level control switch elements corresponding to the line are respectively connected to a DC power output terminal corresponding to the DC power input terminal.
[0017] In some embodiments of the present application, the DC-DC power supply unit is a multi-channel low voltage drop linear regulator.
[0018] In some embodiments of the present application, the multi-line open circuit detection device includes:
[0019] A test board, on which a plurality of groups of high-level control switch units are arranged.
[0020] In some embodiments of the present application, the multi-line open circuit detection device further includes:
[0021] A connector, comprising a male connector and a female connector, wherein one of the male connector and the female connector has a plurality of first connection terminals connected to the control ends of all high-level control switch units in a plurality of groups of high-level control switch units, and the other of the male connector and the female connector has a plurality of second connection terminals connected to all detection points in a plurality of lines.
[0022] In some embodiments of the present application, the microprocessor is a single-chip microcomputer chip.
[0023] Compared with the prior art, the advantages and positive effects of the utility model are:
[0024] (1) The present application adopts a DC-DC power supply unit, multiple groups of high-level control switch units, a level collection unit and a microcontroller in a multi-line open circuit detection device. A group of high-level control switch units corresponds to one line, and by setting multiple detection points on each line, a corresponding level is collected at the level collection end for each detection point, and the level is used to determine whether there is an open circuit point on the line. In this way, open circuit detection of multiple lines is achieved at the same time, thereby improving the efficiency of line open circuit detection;
[0025] (2) The detection device is built with multiple discrete components and has a simple structure, is easy to implement and has low cost.
[0026] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0028] Figure 1 The principle of the multi-line open circuit detection device proposed by the utility model is Figure 1 ;
[0029] Figure 2 It is a partial circuit realization diagram of the multi-line open circuit detection device proposed by the utility model;
[0030] Figure 3 The principle of the multi-line open circuit detection device proposed by the utility model is Figure 2 .
[0031] Reference numerals:
[0032] 10. DC-DC power supply unit; 20. A group of high-level control switch units; 30. Level acquisition unit; 31. Level acquisition subunit; 40. Microcontroller; 50. Test board; 60. Connector. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0034] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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, and therefore should not be understood as a limitation on the present application.
[0035] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.
[0036] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0038] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.
[0039] In order to realize batch open circuit detection of multiple lines, see Figures 1 to 3 The present application relates to a multi-line open circuit detection device, which determines whether there is an open circuit point in the line by collecting the electrical level at the detection point, and can detect multiple lines at the same time to improve the detection efficiency.
[0040] The multi-line open circuit detection device includes a DC-DC power supply unit 10 , a plurality of groups of high-level control switch units, a level acquisition unit 30 and a microcontroller 40 .
[0041] The DC-DC power supply unit 10 provides voltage for the multi-line open circuit detection device, and has a DC power input terminal and a DC power output terminal. The DC power input terminal receives an input voltage, and the DC power output terminal outputs an output voltage.
[0042] In some embodiments of the present application, the input voltage is higher than the output voltage, that is, the DC-DC power supply unit 10 steps down the voltage.
[0043] In the present application, multiple detection point open circuit detection is performed on multiple lines. Therefore, a group of high-level control switch units is set for each line, and the number of groups of high-level control switch units is the same as the number of multiple lines to be detected.
[0044] A group of high-level control switch units includes a plurality of high-level control switch units, and the number of the group of high-level control switch units is equal to the number of detection points on one line.
[0045] A free end of a line is connected to the input voltage, and multiple detection points are arranged in sequence along the line from the free end. The control end of each high-level control switch unit in each group is respectively connected to each detection point, and one end of each high-level control switch unit is respectively grounded and the other end is respectively connected to the output voltage.
[0046] For example, see Figure 2, with n lines (i.e., L1, L2, ..., Ln), and each line has m detection points (for example, the first line L1 has detection points P11, P12, P13, ..., P1i, ..., P1m), and has n groups of high-level control switch units (see Figure 2 A group of high-level control switch units 20 is shown in the figure, and each group of high-level control switch units has m high-level control switch units.
[0047] The high-level control switch unit can be selected as an NPN tube or an NMOS tube, which is used to be turned on when receiving a high level and turned off when receiving a low level.
[0048] In the present application, the high level control switch unit may select an NMOS tube.
[0049] For example, see Figure 3 A group of high-level control switch units 20 shown in FIG. 1 includes a high-level control switch unit Q11 , a high-level control switch unit Q12 , a high-level control switch unit Q13 , . . . , a high-level control switch unit Qnm.
[0050] In order to realize reliable open circuit detection for multiple lines, in some embodiments of the present application, see Figure 2 The DC-DC power supply unit 10 is a multi-channel low voltage linear regulator (ie, LDO), which has multiple DC power input terminals and multiple DC power output terminals corresponding to the multiple DC power input terminals.
[0051] The number of input / output terminals of the multi-channel LDO is greater than or equal to the number of groups of high-level control switch elements to ensure that each group of high-level control switches uses the same input voltage received by the DC power input terminal and the same output voltage output by the DC power output terminal.
[0052] The level acquisition unit 30 has a plurality of level acquisition terminals, the number of which is the same as the number of all detection points in the plurality of lines, and is used to determine whether there is an open point in the line according to the level acquired by each level acquisition terminal.
[0053] In order to facilitate the circuit layout, in some embodiments of the present application, the level acquisition unit 30 uses multiple level acquisition sub-units (see Figure 2 , which shows that one of the level acquisition subunits 31 is formed, each level acquisition subunit 31 can be an AD conversion unit, which outputs to the microcontroller 40 for processing and judgment.
[0054] The number of the multiple level collecting sub-units 31 may be the same as the number of the multiple lines.
[0055] For example, three lines (referred to as a first line L1, a second line L2, and a third line L3) are taken as an example for description.
[0056] See also Figure 2 If n=3, three detection points are arranged on each line, that is, a first detection point P11, a second detection point P12 and a third detection point P13 are sequentially arranged starting from a free end A on the first line L1, a first detection point P21, a second detection point P22 and a third detection point P23 are sequentially arranged starting from a free end B on the second line L2, and a first detection point P31, a second detection point P32 and a third detection point P33 are sequentially arranged starting from a free end C on the third line L3.
[0057] Furthermore, for the three lines, three level acquisition subunits are set, which are recorded as the first level acquisition subunit (ie, Figure 2 , a level acquisition subunit 31 shown in FIG. 1 ), a second level acquisition subunit and a third level acquisition subunit.
[0058] Each level collection subunit has a plurality of collection terminals, and the number of the plurality of collection terminals is the same as the number of detection points on a line.
[0059] Correspondingly, in order to accurately determine whether there is an open circuit point on the line, there is also an output terminal corresponding to each acquisition terminal, which is used to connect to the microcontroller 40.
[0060] Correspondingly, three DC input terminals (denoted as IN1, IN2 and IN3) and corresponding three DC output terminals (denoted as OUT1, OUT2 and OUT3) of the multi-channel LDO are used.
[0061] For each line, three high-level controlled switch units are used.
[0062] See also Figure 2 For the first line L1, a high-level control switch unit NMOS tube Q11, a high-level control switch unit NMOS tube Q12 and a high-level control switch unit NMOS tube Q13 are sequentially set corresponding to the first detection point P11, the second detection point P12 and the third detection point P13.
[0063] For the second line L2, high level control switch unit NMOS transistor Q21, high level control switch unit NMOS transistor Q22 and high level control switch unit NMOS transistor Q23 are sequentially set corresponding to the first detection point P21, the second detection point P22 and the third detection point P23.
[0064] For the third line L3, high level control switch unit NMOS transistor Q31, high level control switch unit NMOS transistor Q32 and high level control switch unit NMOS transistor Q33 are sequentially set corresponding to the first detection point P31, the second detection point P32 and the third detection point P33.
[0065] Correspondingly, three DC input terminals (denoted as IN1, IN2 and IN3) and corresponding three DC output terminals (denoted as OUT1, OUT2 and OUT3) of the multi-channel LDO are used.
[0066] The first level acquisition subunit includes a first acquisition terminal S11, a second acquisition terminal S12 and a third acquisition terminal S13; the second level acquisition subunit includes a first acquisition terminal S21, a second acquisition terminal S22 and a third acquisition terminal S23; the third level acquisition subunit includes a first acquisition terminal S31, a second acquisition terminal S32 and a third acquisition terminal S33.
[0067] The DC input terminal IN1 is connected to the free end A of the first line L1, the first detection point P11 is connected to the gate of the NMOS tube Q11, the source is grounded, and the drain is connected to the DC output terminal OUT1 and the first collection terminal S11 of the first level collection subunit; the second detection point P12 is connected to the gate of the NMOS tube Q12, the source is grounded, and the drain is connected to the DC output terminal OUT1 and the second collection terminal S12 of the first level collection subunit; the third detection point P13 is connected to the gate of the NMOS tube Q13, the source is grounded, and the drain is connected to the DC output terminal OUT1 and the third collection terminal S13 of the first level collection subunit.
[0068] The microcontroller 40 can determine which position between the free end A and the third detection point P13 has an open circuit according to the first detection point P11, the second detection point P12 and the third detection point P13 in the first line L1 by receiving the signal output by the first level acquisition subunit.
[0069] Assume that there is an open circuit between the first detection point P11 and the second detection point P12, and the NMOS tube Q11 is turned on. At this time, the first collection terminal S11 collects a low level, and the NMOS tube Q12 is turned off, so that the first collection terminal S11 collects a high level. Therefore, according to the signal collected by the collection terminal of the first level collection subunit, the microcontroller 40 can determine at which position in the first line L1 the open circuit occurs.
[0070] The microcontroller 40 can determine which position between the free end B and the third detection point P23 has an open circuit according to the first detection point P121, the second detection point P22 and the third detection point P23 in the second line L2 by receiving the signal output by the second level acquisition subunit.
[0071] Assume that there is an open circuit between the first detection point P22 and the second detection point P23, and the NMOS tube Q22 is turned on. At this time, the first collection terminal S21 collects a low level, and the NMOS tube Q22 is turned off, so that the first collection terminal S21 collects a high level. Therefore, according to the signal collected by the collection terminal of the second level collection subunit, the microcontroller 40 can determine at which position in the second line L2 the open circuit occurs.
[0072] Similarly, the microcontroller 40 determines which position in the third line L3 has an open circuit according to the signal collected by the third level collecting subunit.
[0073] In order to facilitate the arrangement of multiple groups of discrete high-level control switch units, in some embodiments of the present application, see Figure 3 , a test board 50 is provided.
[0074] The multiple groups of high-level control switch units as described above are arranged on the test board 50 .
[0075] And in order to facilitate the open circuit detection of multiple lines, see Figure 3 A connector 60 is also provided, and the connector 60 includes a male head (not shown) and a female head (not shown) for mating.
[0076] The connector 60 is connected between the test board 50 and the circuit to be tested.
[0077] The following description will be made by taking the male connector 60 connected to the test board 40 and the female connector 60 connected to the circuit to be tested as an example.
[0078] The male connector has a plurality of first connection terminals (not shown), and the female connector has a plurality of second connection terminals (not shown).
[0079] The plurality of first connection terminals are respectively connected to the gates of the high-level control switch units on the test board 50 , and the plurality of second connection terminals are respectively connected to the detection points of the circuits to be tested.
[0080] In this way, when the male connector of the connector 60 is connected to the female connector, the circuit to be tested is electrically connected to the test board 50 .
[0081] In the present application, the microcontroller 40 may be a single-chip processing chip.
[0082] The microcontroller 40 may also output multiple line open circuit detection results after determination, and the results may be provided to the user in the form of text.
[0083] The multi-line open circuit detection device provided in the present application can simultaneously detect multiple detection points of each line in multiple lines to determine whether there are open circuit points in the line, and simultaneously detect to improve detection efficiency.
[0084] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.
Claims
1. A multi-line open circuit detection device, which is used to perform open circuit detection on multiple lines, characterized in that: The multi-line open circuit detection device comprises: A DC-DC power supply unit having a DC power input terminal and a DC power output terminal, wherein an output voltage output by the DC power output terminal is lower than an input voltage input by the DC power input terminal; A plurality of groups of high-level control switch units, one group of high-level control switch units corresponds to one line and includes a plurality of high-level control switch units corresponding to a plurality of detection points on one line, a free end of one line is connected to the input voltage, a plurality of detection points are arranged in sequence along one line from the free end, a control end of each of the high-level control switches in each group is respectively connected to each detection point, one end of each high-level control switch is respectively grounded and the other end is respectively connected to the output voltage; A level acquisition unit, comprising a plurality of level acquisition terminals, the number of which is the same as the number of all detection points in the plurality of lines, and the level acquisition terminals are correspondingly connected to the other end of the high level control switch unit; A microcontroller is connected to the level acquisition unit.
2. The multi-line open circuit detection device according to claim 1, characterized in that: The level acquisition unit comprises: A plurality of level acquisition subunits, the number of which is the same as the number of the plurality of lines, the level acquisition subunit having a plurality of level acquisition ports corresponding to one line, the number of the plurality of level acquisition ports being the same as the number of the plurality of detection points on the one line, the level acquisition ports of the plurality of level acquisition subunits forming a plurality of level acquisition terminals.
3. The multi-line open circuit detection device according to claim 1, characterized in that: The high-level control switch unit is an NMOS tube, the gate of the NMOS tube is connected to the detection point, the source is grounded, and the drain is respectively connected to the output voltage and the level collection terminal.
4. The multi-line open circuit detection device according to claim 1, characterized in that: The DC-DC power supply unit has multiple DC power input terminals and multiple DC power output terminals; The number of the multiple DC power input terminals is equal to the number of the multiple DC power output terminals and is greater than or equal to the number of the multiple lines; A DC power input terminal corresponds to a DC power output terminal, and a free end of a line is connected to the DC power input terminal, and the other ends of multiple high-level control switch elements corresponding to the line are respectively connected to a DC power output terminal corresponding to the DC power input terminal.
5. The multi-line open circuit detection device according to claim 4, characterized in that: The DC-DC power supply unit is a multi-channel low voltage drop linear regulator.
6. The multi-line open circuit detection device according to claim 4, characterized in that: The multi-line open circuit detection device comprises: A test board, on which a plurality of groups of high-level control switch units are arranged.
7. The multi-line open circuit detection device according to claim 4, characterized in that: The multi-line open circuit detection device also includes: A connector, comprising a male connector and a female connector, wherein one of the male connector and the female connector has a plurality of first connection terminals connected to the control ends of all high-level control switch units in a plurality of groups of high-level control switch units, and the other of the male connector and the female connector has a plurality of second connection terminals connected to all detection points in a plurality of lines.
8. The multi-line open circuit detection device according to claim 1, characterized in that: The microprocessor is a single chip microcomputer chip.