Portable automobile controller wire harness detection device

Abstract

The utility model relates to a portable automobile controller wire harness detection device, comprising a control module which is provided with an electric signal port, a digital signal port and a control grounding port; the wire harness comprises a plurality of circuits, the first end of each circuit is connected with the electronic controller, the second end of each circuit is connected with the wiring terminal, and the plurality of circuits of each wire harness are provided with measuring points; the measurement judgment relay module comprises a plurality of measurement sub-modules, each measurement sub-module is provided with a plurality of lines, and the lines at the second ends of the measurement sub-modules are connected with the measurement points; the current analog quantity acquisition module, the control module, the current analog quantity acquisition module, the measurement sub-module and the measurement point are sequentially connected in series; and the voltage analog quantity acquisition module is provided with a voltage grounding port and a plurality of positive ports, and the positive ports of the voltage analog quantity acquisition module are connected with the lines of the first ends of the measurement sub-modules one by one. According to the utility model, the electronic controller can automatically measure whether the pull-up and pull-down resistors of the wire harness circuit and the wire harness circuit are correctly connected or not under different working conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to the wire harness detection technical field, especially a portable automobile controller wire harness detection device. BACKGROUND

[0002] The automobile engine electronic controller (ECU) and the whole vehicle terminal are connected through the wire harness, whether it is test matching or other reasons, need to determine whether the wire harness circuit or the connected equipment meets the requirement, therefore judges through the test. The current detection technology is to test whether the wire harness circuit is connected correctly or not.

[0003] Therefore, it is necessary to provide a portable automobile controller wire harness detection device, which can measure the pull-up or pull-down resistance of the wire harness circuit and whether the wire harness circuit is connected correctly under different working conditions. UTILITY MODEL CONTENTS

[0004] The utility model discloses a portable automobile controller wire harness detection device can realize the electronic controller under different working conditions and measure whether the wire harness circuit is connected correctly.

[0005] In order to solve the problems in the prior art, the utility model provides a portable automobile controller wire harness detection device, which comprises:

[0006] The box body is provided with an electrical mounting plate in the box body.

[0007] The control module is arranged on the electrical mounting plate, and the control module is provided with an electrical signal port, a digital signal port and a control grounding port.

[0008] The wire harness comprises a plurality of lines, the first end of each line is connected with the electronic controller through an electrical connector, the second end of each line is connected with the terminal through an electrical connector, the terminal is arranged on the electrical mounting plate, the plurality of lines are provided with measuring points, the measuring points and the electronic controller form a first section, and the measuring points and the terminal form a second section.

[0009] The measurement judgment relay module is arranged on the electrical installation plate, and comprises a plurality of measurement sub-modules, each of the measurement sub-modules is provided with a plurality of lines, each of the measurement sub-modules has a first end and a second end, each of the lines of the second end of the measurement sub-module is connected with the measuring point, the measurement sub-module is provided with a port connected with the digital signal port, and the measurement sub-module is further provided with a port connected with the control ground port.

[0010] The current analog quantity acquisition module is arranged on the electrical installation plate, the first section of the wire harness line and the second section of the wire harness line are connected with the measuring point, and the electric signal port, the current analog quantity acquisition module, the measurement sub-module and the measuring point are sequentially connected in series.

[0011] The voltage analog quantity acquisition module is arranged on the electrical installation plate, and has a voltage ground port and a plurality of positive electrode ports, the positive electrode ports of the voltage analog quantity acquisition module are connected with the lines of the first end of the measurement sub-module one by one, and the voltage ground port is connected with the control ground port.

[0012] Optionally, in the portable automobile controller wire harness detection device, the serial connection lines are as follows:

[0013] The electric signal port is connected with the input port of the current analog quantity acquisition module, the input port of the current analog quantity acquisition module is connected with the lines of the first end of the measurement sub-module one by one, and each of the lines of the second end of the measurement sub-module is connected with the measuring point.

[0014] Optionally, in the portable automobile controller wire harness detection device, each of the lines of the first end of the measurement sub-module is connected with each port of the current analog quantity acquisition module.

[0015] Each of the lines of the first end of the measurement sub-module is connected with each port of the voltage analog quantity acquisition module.

[0016] Optionally, in the portable automobile controller wire harness detection device, the portable automobile controller wire harness detection device further comprises a wire harness selection relay module, the wire harness selection relay module is arranged on the electrical installation plate, the wire harness selection relay module is provided with a selection sub-module, the selection sub-module is connected with the wire harness line, the selection sub-module is provided with a port connected with the digital signal port, and the selection sub-module is further provided with a port connected with the control ground port.

[0017] Optionally, in the portable automobile controller wire harness detection device, a current protection circuit is further arranged between the electric signal port and the current analog quantity acquisition module.

[0018] Optionally, in the portable automobile controller wire harness detection device, the portable automobile controller wire harness detection device further comprises a communication module and a power module, the host computer issues an instruction to the communication module, and the communication module issues an instruction to the control module.

[0019] Optionally, in the portable automobile controller wire harness detection device, the electric connector comprises an aviation plug.

[0020] Optionally, in the portable automobile controller wire harness detection device, the measurement judgment relay module is a mechanical contact type relay, and the wire harness selection relay module is a mechanical contact type relay.

[0021] Optionally, in the portable automobile controller wire harness detection device, the measurement judgment relay module has a plurality of measurement sub-modules, only one of which is connected at a time, and the number of lines of each measurement sub-module is less than or equal to the number of output ports of the current analog quantity acquisition module.

[0022] Only one of the measurement sub-modules is connected at a time, and the number of lines of each measurement sub-module is less than or equal to the number of positive electrode ports of the voltage analog quantity acquisition module.

[0023] Only one of the measurement sub-modules is connected at a time, and the number of lines of each measurement sub-module is less than or equal to the number of positive electrode ports of the voltage analog quantity acquisition module.

[0024] In the portable automobile controller wire harness detection device provided by the utility model, whether the wire harness line is successfully grounded, and whether the pull-up or pull-down resistance value and voltage value of the wire harness line are correct can be detected on the vehicle site at the same time, the detection speed is greatly accelerated, the workload of the on-site detection personnel is reduced, the detection reliability is improved, and the utility model also has the characteristics of low cost and convenience for carrying. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The structure diagram of the portable automobile controller wire harness detection device provided by the utility model embodiment is shown in the figure.

[0026] Figure 2 The system principle diagram of the portable automobile controller wire harness detection device provided by the utility model embodiment is shown in the figure.

[0027] Among them, 1 is a host computer, 2 is a box body, 3 is an IO module, 31 is a control module, 32 is a voltage analog quantity acquisition module, 33 is a current analog quantity acquisition module, 34 is a communication module, 4 is a wire harness, 5 is a wire harness selection relay module, 6 is an electronic controller, 7 is a wiring terminal, 8 is a measurement judgment relay module, 9 is a voltage division module, and 10 is a current protection circuit. DETAILED DESCRIPTION

[0028] The specific embodiments of the present application will be described in more detail below with reference to the accompanying drawings. The advantages and features of the present application will be more apparent from the following description. It should be noted that the drawings are very simplified and use non-precise proportions, only for the purpose of conveniently and clearly assisting the description of the embodiments of the present application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] In the prior art, the automobile engine electronic controller 6 (ECU) and the vehicle wiring terminal 7 are connected through a wire harness. Whether it is test matching or other reasons, it is necessary to determine whether the wire harness or the connected device meets the requirements, so testing is required to make a judgment. The current detection technology is to test the continuity or line sequence of the wire harness alone, or to test whether the voltage provided by the electronic controller 6 meets the requirements. There is no technology that can automatically test whether the multiple lines matched with the electronic controller 6 meet the requirements and can test whether the voltage provided by the electronic controller 6 meets the requirements.

[0031] In order to solve the problems in the prior art, the present application provides a portable automobile controller wire harness detection device, as shown in Figure 1 and Figure 2 , comprising:

[0032] a box body 2, wherein the box body 2 is provided with an electrical mounting plate;

[0033] an IO module 3, wherein the IO module 3 comprises a control module 31, a current analog quantity acquisition module 33, a voltage analog quantity acquisition module 32 and a communication module 34;

[0034] the control module 31 (i.e. DO as shown in Figure 2 ), which is arranged on the electrical mounting plate, is provided with an electrical signal port (i.e. DO7 as shown in Figure 2 ), a digital signal port (i.e. DO0-DO6 as shown in Figure 2 ) and a control ground port (i.e. COM- in DO as shown in Figure 2 );

[0035] Wire harness 4 includes several lines, the first end of each line is connected with electronic controller 6 through an electrical connector (which can be an aviation plug), the second end of each line is connected with terminal 7 through an electrical connector, terminal 7 is provided on an electrical mounting plate, the several lines are provided with measuring points, the measuring points are connected with the first section of the electronic controller 6, and the measuring points are connected with the second section of the terminal 7;

[0036] Generally, there are other lines without measuring points.

[0037] Measurement judgment relay module 8 is provided on the electrical mounting plate, and the measurement judgment relay module 8 includes several measurement sub-modules, the measurement sub-modules are provided with several lines, each measurement sub-module has a first end and a second end (referring to Figure 2 , the second end of the measurement sub-module is on the left side, and the first end of the measurement sub-module is on the right side), the lines at the second end of the measurement sub-module are connected with the measuring points, the measurement sub-module is provided with a port connected with the digital signal port (i.e. Figure 2 DO0-DO6 shown in the figure), and the measurement sub-module is also provided with a port connected with the control ground port (i.e. Figure 2 COM- in DO shown in the figure);

[0038] Generally, the number of the measurement sub-modules is increased or decreased according to actual needs.

[0039] Current analog quantity acquisition module 33 is provided on the electrical mounting plate, the first section of the lines of wire harness 4 and the second section of the lines of wire harness 4 are connected with the measuring points, the electrical signal port (i.e. Figure 2 DO7 shown in the figure), the current analog quantity acquisition module 33, the measurement sub-module and the measuring points are connected in sequence;

[0040] Specifically, referring to Figure 2 , the power supply of the electronic controller 6 is disconnected, the electrical signal port of the control module 31 starts to supply power, and whether the current analog quantity acquisition module 33 has current passing through is measured, so as to judge whether the ground wire in the lines of wire harness 4 is correctly grounded, if it is shown that current passes through, there is grounding, and the resistance value can be calculated according to the voltage given by the electrical signal port (i.e. Figure 2 DO7 shown in the figure), if there is no current passing through, there is no grounding.

[0041] Voltage analog quantity acquisition module 32 is provided on the electrical mounting plate, and the voltage analog quantity acquisition module 32 has a voltage ground port (i.e. Figure 2 COM of voltage AI shown in the figure) and a plurality of positive electrode ports (i.e. Figure 2The positive port of the voltage analog acquisition module 32 is connected to the line of the first end of the measurement sub-module, and the voltage grounding port (i.e., the AI ​​port) is connected to the line of the first end of the measurement sub-module. Figure 2 The voltage AI (COM) shown is connected to the control ground port.

[0042] For details, please refer to Figure 2 Disconnect the power supply to the electronic controller 6, and the electrical signal port of the control module 31 will start supplying power. The voltage analog quantity acquisition module 32 will measure the voltage on the two parallel wire harnesses 4, and the current analog quantity acquisition module 33 will measure the total current flowing through the two parallel wire harnesses 4. In this way, the total resistance of the two parallel wire harnesses 4 will be measured. If the resistance value is the same as the value provided by the manufacturer, then the wire harnesses 4 are not problematic; otherwise, the wire harnesses 4 are problematic.

[0043] Preferably, the measurement and judgment relay module 8 further includes a voltage divider module 9.

[0044] The voltage divider module 9 is equipped with multiple lines and voltage divider resistors (i.e., Figure 2 R3 (as shown) and voltage-measuring resistor (i.e. Figure 2 As shown in R2), the control grounding port, the voltage measuring resistor, the voltage dividing resistor, and the measuring point are connected in series. The line at the second end of the measuring sub-module is connected between the voltage measuring resistor and the voltage dividing resistor of the voltage dividing module 9 (see reference). Figure 2 The circuit of voltage divider module 9 starts from its right side and connects to the circuit on the left side of the measurement module.

[0045] For details, please refer to Figure 2 The voltage analog quantity acquisition module 32 has a range. When the voltage value provided by the electronic controller 6 exceeds the range of the voltage analog quantity acquisition module 32, the voltage divider module 9 needs to be connected. At this time, the voltage provided by the electronic controller 6 is the sum of the voltages across the voltage divider resistor and the voltage measuring resistor. The voltage divider resistor is used to divide away the excess voltage, allowing the voltage analog quantity acquisition module 32 to measure the voltage value across the voltage measuring resistor. The obtained voltage value is within the range. The voltage of the electronic controller 6 is calculated using the calculation formula. If the measured voltage value is the same as the voltage value provided by the electronic controller 6, the voltage is correct; otherwise, the voltage is incorrect.

[0046] Furthermore, the formula for calculating the voltage of the electronic controller 6 is as follows:

[0047] The voltage of the electronic controller 6 is (a+b)*c / b, where a is the resistance of the voltage divider resistor, b is the resistance of the voltage measuring resistor, and c is the voltage across the voltage measuring resistor.

[0048] Generally, the voltage dividing module 9 increases or decreases the number according to the actual demand, wherein the voltage dividing resistor, the voltage measuring resistor and the line on the voltage dividing module 9 constitute a voltage dividing circuit.

[0049] Optionally, in the portable automobile controller wire harness detection device, the series line is as follows:

[0050] The electric signal port is connected with the input port of the current analog quantity acquisition module 33 (the current analog quantity acquisition module 33 has only a signal input port), the input port of the current analog quantity acquisition module 33 is connected with the first end of the measurement sub-module, and each line of the second end of the measurement sub-module is connected with the measurement point.

[0051] Optionally, in the portable automobile controller wire harness detection device, each line of the first end of the measurement sub-module is connected with each port of the current analog quantity acquisition module 33 respectively;

[0052] Each line of the first end of the measurement sub-module is connected with each port of the voltage analog quantity acquisition module 32 respectively.

[0053] Specifically, referring to Figure 2 No matter how many lines of the wire harness 4 need to be measured, each time only one line of the measurement sub-module is connected with the voltage analog quantity acquisition module 32 and or the current analog quantity acquisition module 33, at this time, each line of the measurement sub-module is connected with the positive port of the voltage analog quantity acquisition module 32 one by one, and each line of the measurement sub-module is connected with the input port of the current analog quantity acquisition module 33 one by one.

[0054] Optionally, in the portable automobile controller wire harness detection device, the portable automobile controller wire harness detection device further comprises a wire harness selection relay module 5, the wire harness selection relay module 5 is arranged on the electrical installation plate, the wire harness selection relay module 5 is provided with a selection sub-module, the selection sub-module is connected with the line of the wire harness 4, the selection sub-module is provided with a port connected with the digital signal port, and the selection sub-module is further provided with a port connected with the control ground port.

[0055] Generally, the number of measurement points on the line of the wire harness 4 to be measured is large, and the detection is carried out one by one in the detection field, which is low in efficiency and wastes manpower, so that the measurement judgment relay module 8 can detect all the lines on the selected grouping module at one time by connecting one grouping module.

[0056] The measurement judgment relay module 8 is a mechanical contact type relay, and the wire harness selection relay module 5 is a mechanical contact type relay.

[0057] Optionally, in the portable automobile controller wire harness detection device,

[0058] The measurement judging relay module 8 has a plurality of measurement sub-modules, only one of which is connected at a time, and the number of lines of each measurement sub-module is less than or equal to the number of output ports of the current analog quantity acquisition module 33.

[0059] Only one of the measurement sub-modules is connected at a time, and the number of lines of each measurement sub-module is less than or equal to the number of positive ports of the voltage analog quantity acquisition module 32.

[0060] Preferably, a current protection circuit 10 (i.e. ​ R1) is further arranged between the electric signal port and the current analog quantity acquisition module 33.

[0061] Optionally, in the portable automobile controller wire harness detection device, the portable automobile controller wire harness detection device further comprises a communication module 34 and a power module, the host computer 1 issues an instruction to the communication module 34, the communication module 34 issues an instruction to the control module 31, and finally, the current analog quantity acquisition module 33 and the voltage analog quantity acquisition module 32 transmit the tested data to the host computer 1.

[0062] In summary, in the portable automobile controller wire harness detection device provided by the present application, it can be detected whether the wire harness line is correctly connected and whether the pull-up or pull-down resistance value of the wire harness line is correct at the same time, which greatly speeds up the detection speed, reduces the workload of the on-site detection personnel, improves the detection reliability, and has the characteristics of low cost and portability.

[0063] The above is only a preferred embodiment of the present application, and does not limit the present application in any way. Any person skilled in the art, without departing from the scope of the technical solution of the present application, can make any form of equivalent replacement or modification of the technical solution and technical content disclosed in the present application, and such changes still belong to the protection scope of the present application.

Claims

1. A portable automotive controller wire harness detection device, characterized by, The portable automobile controller wire harness detection device comprises a box body, a control module, a wire harness, a measurement judgment relay module, a current analog quantity acquisition module, a voltage analog quantity acquisition module and a wire harness selection relay module. The box body is internally provided with an electrical installation plate. The control module is arranged on the electrical installation plate and is provided with an electrical signal port, a digital signal port and a control grounding port. The wire harness comprises a plurality of lines, the first end of each line is connected to an electronic controller through an electrical connector, and the second end of each line is connected to a terminal through an electrical connector. The terminal is arranged on the electrical installation plate, the plurality of lines are provided with measuring points, the measuring points and the electronic controller are connected through a first section, and the measuring points and the terminal are connected through a second section. The measurement judgment relay module is arranged on the electrical installation plate and comprises a plurality of measurement sub-modules. Each measurement sub-module is provided with a plurality of lines, each measurement sub-module has a first end and a second end, the lines at the second end of each measurement sub-module are connected to the measuring points, each measurement sub-module is provided with a port connected to the digital signal port, and each measurement sub-module is further provided with a port connected to the control grounding port.

2. The portable automobile controller wire harness detection apparatus of claim 1, wherein, The current analog quantity acquisition module is arranged on the electrical installation plate, the first section of the wire harness line and the second section of the wire harness line are connected to the measuring points, and the electrical signal port, the current analog quantity acquisition module, the measurement sub-module and the measuring points are connected in sequence. The voltage analog quantity acquisition module is arranged on the electrical installation plate and has a voltage grounding port and a plurality of positive electrode ports.

3. The portable automobile controller wire harness detection apparatus of claim 2, wherein, The positive electrode ports of the voltage analog quantity acquisition module are connected to the lines at the first end of the measurement sub-module one by one, and the voltage grounding port is connected to the control grounding port. The serial connection lines are as follows:

4. The portable automobile controller wire harness detection apparatus of claim 1, wherein, The electrical signal port is connected to the input port of the current analog quantity acquisition module, the input port of the current analog quantity acquisition module is connected to the lines at the first end of the measurement sub-module one by one, and the lines at the second end of each measurement sub-module are connected to the measuring points.

5. The portable automobile controller wire harness detection apparatus of claim 1, wherein, Each line at the first end of the measurement sub-module is connected to each port of the current analog quantity acquisition module.

6. The portable automobile controller wire harness detection apparatus of claim 1, wherein, Each line at the first end of the measurement sub-module is connected to each port of the voltage analog quantity acquisition module.

7. The portable automobile controller wire harness detection apparatus of claim 1, wherein, The portable automobile controller wire harness detection device further comprises a wire harness selection relay module.

8. The portable automobile controller wire harness detection apparatus of claim 4, wherein, The wire harness selection relay module is arranged on the electrical installation plate and is provided with a selection sub-module. The selection sub-module is connected to the wire harness line, the selection sub-module is provided with a port connected to the digital signal port, and the selection sub-module is further provided with a port connected to the control grounding port. A current protection circuit is further arranged between the electrical signal port and the current analog quantity acquisition module. The portable automobile controller wire harness detection device further comprises a communication module and a power supply module. The host computer issues an instruction to the communication module, and the communication module issues an instruction to the control module. The electrical connector comprises an aviation plug. The measurement judgment relay module is a mechanical contact type relay, and the wire harness selection relay module is a mechanical contact type relay.

9. The portable automobile controller wire harness detection device of claim 1, wherein the measurement judgment relay module has a plurality of measurement sub-modules, only one of which is connected at a time, and the number of lines of each measurement sub-module is less than or equal to the number of output ports of the current analog quantity acquisition module. Only one of the measurement sub-modules is connected at a time, and the number of lines of each measurement sub-module is less than or equal to the number of positive electrode ports of the voltage analog quantity acquisition module. ​

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