Test box
By designing a test box containing light emitting diodes and DB9 connectors, the problems of DB9 wiring errors and difficulty in confirming the terminal resistance are solved, and fast and accurate wiring detection and resistance testing are achieved.
Patent Information
- Application Number
- CN202421743702.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-22
AI Technical Summary
In the automotive chassis test automation equipment, frequent human errors occur in DB9 wiring, which makes it difficult to troubleshoot equipment. At the same time, it is difficult to quickly confirm whether there is a 120 ohm terminal resistor installed in DB9.
A test box was designed, including light emitting diodes, DB9 male and female heads, wires and other components. It is connected through a specific circuit, and the unidirectionality of the light emitting diodes is used to determine whether the DB9 wiring is correct, and a resistance meter is used to test whether there is a terminal resistor in DB9.
It realizes rapid detection of whether the DB9 wiring is correct, reduces the human error rate, and can quickly confirm whether there are terminal resistors in DB9, simplifying the troubleshooting process.
Smart Images
Figure CN223022358U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile testing, and particularly relates to a test box. Background Art
[0002] In the industry of automobile chassis test automation equipment, CAN communication is a relatively common communication protocol. During the equipment manufacturing process, the integration of wire harnesses takes a relatively long time. Among them, the wiring frequency of the commonly used D-Sub 9-pin connector (hereinafter referred to as DB9) for CAN communication is relatively high, and human errors are likely to occur, resulting in difficult troubleshooting of equipment failures during subsequent tests. Therefore, it is necessary to quickly detect whether the DB9 wiring is correct during equipment production.
[0003] The CAN communication node needs to be connected to a 120-ohm terminal resistor, which is sometimes installed inside the DB9 plug. If there is no label, it is troublesome to know whether there is a terminal resistor inside the DB9 when troubleshooting.
[0004] Therefore, how to quickly detect whether the DB9 wiring is correct and how to quickly confirm whether there is a terminal resistor inside the DB9 are the focuses of concern for those skilled in the art. Content of the Utility Model
[0005] The purpose of the utility model is to provide a test box that can quickly detect whether the DB9 wiring is correct.
[0006] To achieve the above purpose, the utility model provides a test box, including:
[0007] A housing, on the outer surface of which a light-emitting diode, a first DB9 male head, a first DB9 female head, a second DB9 male head, and a second DB9 female head are installed; on the inner surface of the housing, a plurality of wires are arranged;
[0008] The wires electrically connect pin2 of the first DB9 male head to pin2 of the first DB9 female head and ground it; electrically connect pin7 of the first DB9 male head to pin7 of the first DB9 female head and connect it to a power supply;
[0009] And electrically connect pin2 of the second DB9 male head to pin2 of the second DB9 female head and connect it to the cathode of the diode; electrically connect pin7 of the second DB9 male head to pin7 of the second DB9 female head and connect it to the anode of the diode.
[0010] In an optional solution, the test box further includes a first CANH banana plug female head, a first CANL banana plug female head, a second CANH banana plug female head, and a second CANL banana plug female head;
[0011] The female banana head of the first CANH is electrically connected to pin 2 of the first DB9 male head and pin 2 of the first DB9 female head through a wire;
[0012] The female banana head of the first CANL is electrically connected to pin 7 of the first DB9 male head and pin 7 of the first DB9 female head through a wire;
[0013] The female banana head of the second CANH is electrically connected to pin 2 of the second DB9 male head and pin 2 of the second DB9 female head through a wire;
[0014] The female banana head of the second CANL is electrically connected to pin 7 of the second DB9 male head and pin 7 of the second DB9 female head through a wire.
[0015] In an alternative embodiment, the test box further includes a third DB9 male head, a third DB9 female head, and a resistance meter;
[0016] The wire electrically connects pin 2 of the third DB9 male head to pin 2 of the third DB9 female head and is connected to a resistance test port of the tester; it electrically connects pin 7 of the first DB9 male head to pin 7 of the first DB9 female head and is connected to another resistance test port of the tester;
[0017] The ground terminal of the resistance meter is grounded, and the power supply terminal of the resistance meter is connected to an external power supply.
[0018] In an alternative embodiment, the test box further includes a third female banana head of CANH and a third female banana head of CANL;
[0019] The third female banana head of CANH is electrically connected to pin 2 of the third DB9 male head and pin 2 of the third DB9 female head through a wire;
[0020] The third female banana head of CANL is electrically connected to pin 7 of the third DB9 male head and pin 7 of the third DB9 female head through a wire.
[0021] The beneficial effects of the present utility model are as follows:
[0022] The present utility model can measure whether the wire harness pins of the DB9 connector are correctly connected: after the test box is powered on, insert one end of the wire harness into the male or female head at the A end of the test wire harness, and insert the other end of the wire harness into the male or female head at the B end of the test wire harness, and then observe whether the light-emitting diode 1 lights up. If it lights up, the wire harness pins are correctly connected.
[0023] The present utility model can also test whether the wire harness of the double banana head male is connected and measure the internal resistance of the DB9. Description of the Drawings
[0024] The above and other objects, features, and advantages of the present utility model will become more apparent by describing exemplary embodiments of the present utility model in more detail with reference to the accompanying drawings. In the exemplary embodiments of the present utility model, the same reference numerals generally represent the same components.
[0025] Figure 1 It is a schematic diagram of the panel structure of the test box in an embodiment of the present utility model.
[0026] Figure 2 It is a wiring diagram of the circuit structure of the test box in an embodiment of the present utility model.
[0027] Description of reference numerals:
[0028] 1 - Light - emitting diode; 2 - First DB9 male head; 3 - First DB9 female head; 4 - Second DB9 male head; 5 - Second DB9 female head; 6 - First CANH banana - head female head; 7 - First CANL banana - head female head; 8 - Second CANH banana - head female head; 9 - Second CANL banana - head female head; 10 - Third DB9 male head; 11 - Third DB9 female head; 12 - Resistance meter; 13 - Third CANH banana - head female head; 14 - Third CANL banana - head female head. Detailed implementation manners
[0029] The following further describes the present utility model in detail with reference to the accompanying drawings and specific embodiments. According to the following description and drawings, the advantages and features of the present utility model will be clearer. However, it should be noted that the concept of the technical solution of the present utility model can be implemented in many different forms and is not limited to the specific embodiments described herein. The accompanying drawings are all in very simplified forms and use non - precise scales, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present utility model.
[0030] It should be understood that when an element or layer is referred to as "on...", "adjacent to...", "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected or coupled to the other element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as "directly on...", "directly adjacent to...", "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, without departing from the teachings of the present utility model, the first element, component, region, layer, or part discussed below may be referred to as the second element, component, region, layer, or part.
[0031] Spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. may be used herein for convenience of description to describe the relationship of one element or feature shown in the figures with other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatial relationship terms are also intended to include different orientations of the device in use and operation. For example, if the device in the attached drawings is flipped, then an element or feature described as "under other elements" or "beneath it" or "under it" will be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "beneath" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are to be interpreted accordingly.
[0032] The purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present utility model. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, identify the presence of the stated features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups. As used herein, the term "and / or" includes any and all combinations of the related listed items.
[0033] Embodiment 1
[0034] Referring to Figure 1 and Figure 2 , this embodiment provides a test box, comprising:
[0035] A housing, on the outer surface of which a light-emitting diode 1, a first DB9 male head 2, a first DB9 female head 3, a second DB9 male head 4, and a second DB9 female head 5 are mounted; on the inner surface of the housing, a plurality of wires are arranged; the wires electrically connect pin2 of the first DB9 male head 2 to pin2 of the first DB9 female head 3 and ground it; connect pin7 of the first DB9 male head 2 to pin7 of the first DB9 female head 3 and connect it to a power supply; and connect pin2 of the second DB9 male head 4 to pin2 of the second DB9 female head 5 and connect it to the cathode of the light-emitting diode 1; connect pin7 of the second DB9 male head 4 to pin7 of the second DB9 female head 5 and connect it to the anode of the light-emitting diode 1.
[0036] Specifically, Figure 1 is a front schematic view of the housing panel, Figure 2 is a wiring diagram on the back of the housing panel.Figure 2 The green wire in it is the wire connecting to pin2 of the DB9 plug, the yellow wire is the wire connecting to pin7 of the DB9 plug, the black wire is the ground wire, and the red wire is connected to the 12V power supply. The main principle applied in this embodiment is the unidirectionality of the light-emitting diode 1. When the wiring is correct, the current passes through and the light-emitting diode 1 lights up. When the wiring is reversed (usually pin2 and pin7 are reversed), the bulb does not light up. During the test, the test box is powered on, and the DB9 is plugged into the test box panel, and the result can be quickly judged.
[0037] In this embodiment, the test box further includes a first CANH banana plug female head 6, a first CANL banana plug female head 7, a second CANH banana plug female head 8, and a second CANL banana plug female head 9; the first CANH banana plug female head 6 is electrically connected to pin2 of the first DB9 male head 2 and pin2 of the first DB9 female head 3 through a wire; the first CANL banana plug female head 7 is electrically connected to pin7 of the first DB9 male head 2 and pin7 of the first DB9 female head 3 through a wire; the second CANH banana plug female head 8 is electrically connected to pin2 of the second DB9 male head 4 and pin2 of the second DB9 female head 5 through a wire; the second CANL banana plug female head 9 is electrically connected to pin7 of the second DB9 male head 4 and pin7 of the second DB9 female head 5 through a wire. The test box can also test whether the double banana plug male head wire harness is connected.
[0038] In this embodiment, the test box further includes a third DB9 male head 10, a third DB9 female head 11, and a resistance meter 12; the wire electrically connects pin2 of the third DB9 male head 10 to pin2 of the third DB9 female head 11 and is connected to a resistance test port of the tester; it electrically connects pin7 of the first DB9 male head 2 to pin7 of the first DB9 female head 3 and is connected to another resistance test port of the tester; the ground end of the resistance meter 12 is grounded, and the power supply end of the resistance meter 12 is connected to the 12V power supply. The test box can also quickly test whether there is a terminal resistance (usually 120 ohms) inside the DB9 plug. During the test, if the DB9 male head is to be detected, the DB9 male head is inserted into the third DB9 female head 11, and if the DB9 female head is to be detected, the DB9 female head is inserted into the third DB9 male head 10.
[0039] In this embodiment, the test box further includes a third CANH banana plug female head 13 and a third CANL banana plug female head 14; the third CANH banana plug female head 13 is electrically connected to pin 2 of the third DB9 male head 10 and pin 2 of the third DB9 female head 11 through a wire; the third CANL banana plug female head 14 is electrically connected to pin 7 of the third DB9 male head 10 and pin 7 of the third DB9 female head 11 through a wire. The test box can also quickly test the resistance of the banana plug wire harness. During the test, the two male heads of the banana plug wire harness are respectively inserted into the third CANH banana plug female head 13 and the third CANL banana plug female head 14.
[0040] Figure 1 In the upper half of the test box panel is used for resistance testing, and the lower half is used for wire harness connectivity testing. The A end of the test wire harness includes: a first DB9 male head 2, a first DB9 female head 3, a first CANH banana plug female head 6, and a first CANL banana plug female head 7; the B end of the test wire harness includes: a second DB9 male head 4, a second DB9 female head 5, a second CANH banana plug female head 8, and a second CANL banana plug female head 9.
[0041] The working principle of this embodiment is as follows: The lamp on the external panel of the test box is a light-emitting diode 1. Using the unidirectional principle of the diode 1, when the current direction is reversed, the bulb does not light up, which is used as an indication of the test. For the internal wiring of the test box, the first CANH banana plug female head 6 (pin 7) at the A end of the test wire harness is connected to 12V, the first CANL banana plug female head 7 (pin 2) is connected to the ground GND, the second CANH banana plug female head 8 (pin 7) at the B end of the test wire harness is connected to the positive pole of the light-emitting diode 1, and the second CANL banana plug female head 9 (pin 2) is connected to the negative pole of the light-emitting diode 1. In addition, the internal installed ohmmeter 12 is used to directly test whether there is a 120-ohm terminal resistance inside the DB9. The specific description is as follows:
[0042] Measure whether the wire harness pins of the double DB9 connectors are correctly connected: After the test box is powered on, insert one end of the wire harness into the male or female head at the A end of the test wire harness, and insert the other end of the wire harness into the male or female head at the B end of the test wire harness, and then observe whether the light-emitting diode 1 lights up. If it lights up, the wire harness pins are correctly connected.
[0043] Test whether the wire harness of the double banana plug male heads is connected: After the test box is powered on, insert one end of the wire harness into the CANH or CANL at the A end of the test wire harness, and insert the other end of the wire harness into the corresponding CANH or CANL at the B end of the test wire harness, and then observe whether the light-emitting diode 1 lights up. If it lights up, the wire harness pins are correctly connected.
[0044] Measure the internal resistance of DB9: After the test box is powered on, insert the male or female DB9 connector into the corresponding female or male connector on the panel, and the resistance value will be displayed on the display screen of the resistance meter, so that you can quickly know whether there is a terminal resistance inside the DB9.
[0045] Measure the resistance value of the banana head wire harness: After the test box is powered on, insert the wire harness into the corresponding female connector on the panel, and the resistance value will be displayed on the display screen of the resistance meter, so that you can quickly know the resistance value of the banana head wire harness.
[0046] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention according to the above disclosure are within the scope of protection of the claims.
Claims
1. A test kit, characterized in that: include: A housing, wherein a light-emitting diode, a first DB9 male connector, a first DB9 female connector, a second DB9 male connector, and a second DB9 female connector are mounted on the outer surface of the housing; and a plurality of wires are arranged on the inner surface of the housing; The wire electrically connects pin 2 of the first DB9 male connector to pin 2 of the first DB9 female connector and grounds the connector; and electrically connects pin 7 of the first DB9 male connector to pin 7 of the first DB9 female connector and connects the connector to a power source; And the pin2 of the second DB9 male connector is electrically connected to the pin2 of the second DB9 female connector and connected to the cathode of the diode; the pin7 of the second DB9 male connector is electrically connected to the pin7 of the second DB9 female connector and connected to the anode of the diode.
2. The test kit according to claim 1, characterized in that: The test box also includes a first CANH banana head female connector, a first CANL banana head female connector, a second CANH banana head female connector, and a second CANL banana head female connector; The first CANH banana plug female connector is electrically connected to pin 2 of the first DB9 male connector and pin 2 of the first DB9 female connector through a wire; The first CANL banana plug female connector is electrically connected to pin 7 of the first DB9 male connector and pin 7 of the first DB9 female connector through a wire; The second CANH banana plug female connector is electrically connected to pin 2 of the second DB9 male connector and pin 2 of the second DB9 female connector through a wire; The second CANL banana plug female connector is electrically connected to pin 7 of the second DB9 male connector and pin 7 of the second DB9 female connector through a wire.
3. The test kit according to claim 1, characterized in that: The test box also includes a third DB9 male connector, a third DB9 female connector and an ohmmeter; The wire electrically connects pin 2 of the third DB9 male connector to pin 2 of the third DB9 female connector and connects to a resistance test port of the tester; and electrically connects pin 7 of the first DB9 male connector to pin 7 of the first DB9 female connector and connects to another resistance test port of the tester; The ground terminal of the ohmmeter is grounded, and the power terminal of the ohmmeter is connected to an external power supply.
4. The test kit according to claim 3, characterized in that: The test box also includes a third CANH banana plug female connector and a third CANL banana plug female connector; The third CANH banana plug female connector is electrically connected to pin 2 of the third DB9 male connector and pin 2 of the third DB9 female connector through a wire; The third CANL banana plug female connector is electrically connected to pin 7 of the third DB9 male connector and pin 7 of the third DB9 female connector through a wire.