Low-voltage wire harness detection bench control system

Abstract

The utility model relates to a control system, in particular to a low-voltage wire harness detection table control system, which is characterized in that a detection mainboard is arranged on an IO (input / output) mainframe box, eight IO daughter card slots are arranged on the detection mainboard, eight 256-point IO daughter cards can be mounted on the detection mainboard, eight IO card slots are arranged on an expansion board, eight IO cards can be inserted into the expansion board, the detection mainboard is connected with a 64-pin 2.54 strip-shaped flat cable of the expansion board, and the detection mainboard is connected with the expansion board. 16 IO daughter cards work in parallel, when 16 bits of data are obtained each time, the detection mainboard independently completes opening and closing of point locations and independently completes obtaining of the data, and after all the point locations are collected, complete data are returned to a data caller through a network interface, the system adopts modular design, the mainframe box can be configured with 8 256-point IO daughter cards at most, 256-2048 points are formed, and the system is simple in structure and convenient to use. The expansion board of the expansion case can be configured with at most 8 256-point IO daughter cards, 256-2048 points can be expanded, the maximum point location of the system is 4096, and most test requirements can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a control system, specifically to a control system for controlling detection control device of traffic tool wire harness assembly detection platform. BACKGROUND

[0002] With the more and more functions of traffic tools, the traffic tools are more and more intelligent, and then the electrical connection cable is more and more, and the electrical connection cable is more and more complex. Whether the connection of the wire harness is reliable becomes the key to ensure the normal work of the function.

[0003] At present, the common wire harness detection system is directly controlled by PC through USB or bus control card. Since the operating system of the host computer is usually a non-real-time system, the detection time is relatively slow. And since the PC is directly controlled, the control system and the software are deeply bound, and the secondary development is not convenient, so it is necessary to improve. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the defects of prior art and provides a low-voltage wire harness detection platform control system to solve the above problems.

[0005] The utility model is realized in the following way: a low-voltage wire harness detection platform control system, comprising a computer, a detection mainboard, an extension board, an IO card, a conversion board and a detection module, the detection mainboard is arranged on the host box, there are 8 IO daughter card slots on the detection mainboard, 8 256-point IO daughter cards can be installed, there are 8 IO card slots on the extension board, 8 IO cards can be inserted, the detection mainboard and the extension board are connected by cables, 16 IO daughter cards work in parallel, 16-bit data is acquired each time, the opening and closing of the point are completed independently by the detection mainboard, the acquisition of data is completed independently, after all the points are collected, the complete data is returned to the data caller through the network interface.

[0006] Preferably, the IO daughter card is composed of 16 groups of CD4067 analog switches, each group has 16 channels, each IO daughter card realizes 256 points, 16 groups of analog switches send a signal each time, when receiving, 16 groups of receiving are opened each time, and 16 times can complete the scanning of 256 points of the IO daughter card. The IO card realizes the transmission and reception of 256-point data by 16 groups of CD4067 analog switches, and a piece of CD4067 realizes the enablement of a group of 16 groups of CD4067, realizes the opening of one channel as a source current each time, in each group of CD4067, one piece is used for the source current sending end, and one piece is used for data reception.

[0007] Preferably, the detection mainboard is composed of a Master MCU, a Slave MCU, a voltage comparison chip LM2901, an analog switch chip CD4067 and a network chip W5500, the detection mainboard comprises a main MCU chip and a slave MCU chip, the main MCU chip provides a calling interface, realizes data interaction with a caller, acquires detection data of a wire harness and participates in control opening of a point, and the slave MCU chip receives a control instruction (C0-C3) of the main MCU chip and returns the acquired detection result to the caller through a bus (BUS0-31).

[0008] Preferably, the signal of the source current sending end is controlled by the main MCU, and the signal of the data receiving end is controlled by the slave MCU.

[0009] The utility model has the following beneficial effects:

[0010] 1. The low-voltage wire harness detection platform control system, the detection mainboard is arranged on the mainframe box, there are 8 IO daughter card slots on the detection mainboard, 8 256-point IO daughter cards can be installed, there are 8 IO card slots on the expansion board, 8 IO cards can be inserted, the detection mainboard and the expansion board are connected by a 64-pin 2.54 strip flat cable, 16 IO daughter cards work in parallel, 16-bit data is acquired each time, the opening and closing of the point are completed independently by the detection mainboard, the acquisition of data is completed independently, after all points are collected, complete data is returned to the data caller through the network interface, the system adopts modular design, the mainframe box can be configured with a maximum of 8 256-point IO daughter cards, 256-2048 points are formed, the expansion board of the expansion mainframe can be configured with a maximum of 8 256-point IO daughter cards, and 256-2048 points can be expanded, the maximum point of the system is 4096 points, and most test requirements can be met.

[0011] 2. Since the master-slave MCU cooperative control strategy is adopted, the slave MCU focuses on the point scanning of the system with the longest time, plays the role of coprocessor to provide acceleration effect, therefore, the slave MCU can be configured and optimized in multiple ways according to actual requirements, a higher-performance MCU or a CPLD can be tried to cooperate to improve the scanning speed, and since the function of the slave MCU is unique, design optimization will not affect other modules. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed to be used in the specific embodiment or the prior art will be briefly introduced as follows, and obviously, the drawings in the following description are only one embodiment of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor.

[0013] Figure 1 It is a whole structure schematic view of the utility model.

[0014] Figure 2 It is the detection mainboard structure schematic view of the utility model;

[0015] Figure 3 It is the expansion board structure schematic view of the utility model;

[0016] Figure 4 It is the IO card structure schematic view of the utility model;

[0017] The mark in the drawing is:

[0018] 1, detection mainboard;101, expansion board;2, IO card;3, adapter board;4, detection module. Specific implementation

[0019] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the following clearly and completely describes the technical scheme in the specific implementation of the utility model, to further illustrate the utility model, obviously, the specific implementation described is only a part of the implementation of the utility model, rather than all styles.

[0020] The following combines the attached Figures 1-4 The utility model is further described in detail.

[0021] Low voltage wire harness detection bench control system, including computer, detection mainboard 1, expansion board 101, IO card 2, 201-207, 208-215, adapter board 3, 301-307, 308-315 and detection module 4, detection mainboard 1 is set on host case, and there are 8 IO daughter card slots on detection mainboard 1, can install 8 256 point IO daughter cards;Expansion board 101 has 8 IO card 2 slots, can insert 8 IO cards 208-215;Detection mainboard 1 and expansion board 101 are connected by a 64 needle 2.54 strip flat cable;16 IO daughter cards 2, 201-215 work in parallel, obtain 16 bit data each time, and the opening and closing of point are completed by detection mainboard 1 independently, and the acquisition of data is completed independently, after all point acquisition, complete data is returned to data caller through network interface, the system adopts modular design, and the host case can be configured with 8 256 point IO daughter cards at most, constitutes 256-2048 points, and the expansion board 101 of expansion case can be configured with 8 256 point IO daughter cards at most, can expand 256-2048 points, and the maximum point of system is 4096 points, can satisfy most test demand.

[0022] IO daughter card is composed of 16 groups of CD4067 analog switches, each group has 16 channels, each IO daughter card realizes 256 points, 16 groups of analog switches open one sending signal at a time, when receiving, 16 groups are opened at a time, and 16 times can complete 256 points scanning of IO daughter card. IO card 2 realizes 256 point data transmission and reception by 16 groups of CD4067 analog switches, and a piece of CD4067 realizes enabling of one group in 16 groups of CD4067, realizes opening of one channel as source current at a time, in each group of CD4067, one is used for source current sending end, and one is used for data receiving. Network interface calling mode is adopted to interact with the control system, as long as the device has network interface, it can be called, and can be easily integrated into different devices. The interface calling is flexible, and the calling party can obtain the scanning result by a few instructions.

[0023] The detection mainboard 1 is composed of a Master MCU, a Slave MCU, a voltage comparison chip LM2901, an analog switch chip CD4067 and a network chip W5500. The detection mainboard 1 includes a main MCU chip and a slave MCU chip. The main MCU chip provides a calling interface, realizes data interaction with a caller, obtains detection data of a wire harness and participates in control opening of a point, the slave MCU chip receives control instructions (C0-C3) of the main MCU chip, returns the obtained detection result through a bus (BUS0-31), sends a control signal after the main MCU sends a scanning instruction, controls 16-way 4067 analog switches of an IO daughter card, opens all 16-way channels in turn, obtains a scanning result and saves it, and reports scanning completion to the main MCU chip after scanning of all 16-way channels is completed. The slave MCU chip is connected with four voltage comparison chips LM2901 and is used for receiving a data comparison result and providing data discrimination when a collected voltage reaches a target value. The CD4067 connected with the main MCU chip realizes 16-way IO card 2 enabling selection (EN0-EN7, EN8-EN15), the main MCU enables one IO card 2 at a time during scanning. Eight control lines are connected with the IO daughter card, control 16 groups of 4067 analog switches on the IO daughter card, and one channel of one group of switches is opened at a time to provide a test source current for the wire harness. The slave MCU is connected with the IO card 2 by 8 control signals, controls reception of 16 pairs of analog switches of the IO card 2, one channel of 16-way analog switches is opened at a time, 16 pairs of analog switches are opened at the same time, and 16 times can complete acquisition of 256 point data of one IO card. The network chip W5500 realizes network interconnection function with the main MCU through an SPI bus.

[0024] Because the master-slave MCU cooperative control strategy is adopted, the slave MCU focuses on the time-consuming point scanning of the system, and plays the role of coprocessor to provide acceleration effect. Therefore, the slave MCU can be configured and optimized according to actual needs, and a higher performance MCU or a CPLD can be used to improve the scanning speed. Because the slave MCU is function-specific, the design optimization will not affect other modules.

[0025] The signal of the source current sending end is controlled by the master MCU, and the signal of the data receiving end is controlled by the slave MCU.

[0026] Meanwhile, the control system also supports self-checking function, and the mainboard can be self-checked before detection. When the mainboard has a problem, it is convenient to maintain in time.

[0027] The IO card 2 has ESD protection devices on the external interface, and most of the static electricity hazards can be filtered out during operation, thereby reducing the failure rate and maintenance rate of the system.

[0028] The working principle of the utility model is as follows: when the low-voltage wire harness detection platform control system works, the detection data full text is sent by the external caller through the network interface, and the data is received and saved by the master card. At this time, the master card is in a command waiting state, and when the scanning instruction is received, the master card obtains data from the data full text in turn, determines the number of data output currents to be turned on according to the data, and turns on the point excitation signal of a certain point through the 8-way control signal of the IO card 2. At this time, the command interaction is established with the slave card through the 32-bit bus, and the scanning instruction is sent. After receiving the scanning instruction, the slave card will scan the 16 IO cards 2 in turn. The scanning process is as follows: 16 groups of 4067 analog switches of the IO card 2 open a channel each time, and after 16 channel switching, the slave card can complete scanning of all 256 points on one IO card 2. The second IO card 2 is scanned in turn, and the scanning of the 16 IO cards 2 is completed. At this time, the slave card reports the scanning result to the master card. After receiving the scanning result, the master card has the following behaviors: the slave card scans the effective data and obtains the number of scanning results, at this time, the master card and the slave card enter the data acquisition state, and all scanning results are acquired by the master card. If the slave card does not scan the effective data, the master card ends the scanning of the point, and the next data point is taken from the data full text, and the above cycle is repeated until all points are scanned. After scanning is completed, the master card returns all the scanned results to the caller through the network line, and completes a complete scanning. The system structure is simple and reasonable, the performance is stable and reliable, is suitable for industry popularization, and has wide market prospect. It is highly integrated, has strong anti-interference ability, is convenient to maintain and detect, and has fast detection speed.

[0029] It should be noted that according to the needs of implementation, each component described in the embodiments of the present application can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of the present application. The above embodiments only express several implementation modes of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A low-voltage wire harness detection bench control system, comprising a computer, a detection mainboard (1), an expansion board (101), an IO card, a conversion board (3, 301-307, 308-315) and a detection module (4), characterized in that: The detection mainboard (1) is arranged on the host box, the detection mainboard (1) has eight IO subcard slots, eight 256-point IO subcards can be installed, the extension board (101) has eight IO card slots, eight IO cards can be inserted, the detection mainboard (1) is connected with the extension board (101) through a cable, 16 IO subcards work in parallel, 16-bit data is acquired each time, the opening and closing of the point are independently completed by the detection mainboard (1), the acquisition of data is independently completed, after all the points are collected, complete data is returned to a data caller through a network interface.

2. The low voltage harness bench test stand control system of claim 1, wherein: The IO subcard is composed of 16 groups of CD4067 analog switches, each group has 16 channels, each IO subcard realizes 256 points, 16 groups of analog switches open a sending signal each time, when receiving, 16 groups of receiving are opened each time, 16 times can complete the scanning of 256 points of an IO subcard, the IO card realizes the sending and receiving of 256-point data by 16 groups of CD4067 analog switches, in addition, a CD4067 realizes the enabling of a group of 16 groups of CD4067, realizes the opening of one channel as a source current each time, in each group of CD4067, one is used for the source current sending end, and one is used for data receiving.

3. The low voltage harness bench test stand control system of claim 2, wherein: The detection mainboard (1) is composed of a master MCU, a slave MCU, a voltage comparison chip LM2901, an analog switch chip CD4067 and a network chip W5500, the detection mainboard (1) comprises a master MCU chip and a slave MCU chip, the master MCU chip provides a calling interface, realizes data interaction with a caller, acquires detection data of a wire harness and participates in the control opening of a point, the slave MCU chip receives a control instruction (C0-C3) of the master MCU chip and returns the acquired detection result to a bus (BUS0-31).

4. The low voltage harness bench test stand control system of claim 3, wherein: The signal of the source current sending end is controlled by the master MCU, and the signal of the data receiving end is controlled by the slave MCU.

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