CN211348592U - Wiring harness on-off detection system - Google Patents
Wiring harness on-off detection system Download PDFInfo
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- CN211348592U CN211348592U CN201921929535.1U CN201921929535U CN211348592U CN 211348592 U CN211348592 U CN 211348592U CN 201921929535 U CN201921929535 U CN 201921929535U CN 211348592 U CN211348592 U CN 211348592U
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Abstract
The utility model provides a pencil break-make detecting system, include: the system comprises an input unit, a processor and a detection point position expansion unit, wherein the input unit is used for inputting the number of a detection wire harness to the processor; the processor is used for receiving the serial number and detecting the on-off of the wire harness corresponding to the serial number according to the serial number; the detection point location expansion unit is used for detecting the wire harness detection point location of the wire harness detection system and is in communication connection with the processor; the detection point location expansion unit comprises at least one bus I/O expander. The detection points can be expanded to 6400 detection points through the detection point location expansion unit so as to solve the problem that the existing monitoring points are insufficient, and the detection principle provided by the system is simple and convenient to operate.
Description
Technical Field
The utility model relates to a distribution detection field of elevator control cabinet and electrical apparatus case especially relates to a pencil break-make detecting system.
Background
Due to the diversification of the functions of the wire harnesses and the multiple wire harnesses, higher requirements on a wire harness detection means are provided in order to produce the qualified wire harness with high quality. The wiring harness wiring is required to be carried out on the wiring tool according to the carried functions before the elevator control cabinet and the electrical appliance box are assembled, and wiring personnel need to carry out on-off detection on all electric loops after wiring is finished due to the fact that the wiring harnesses are multiple, so that the phenomenon of misconnection or misconnection of the wiring harnesses is determined to be avoided. At present, the test point positions of the existing wire rod test instruments on the market are usually about 2000, the test instruments are expensive, the detection principle is complex, and the requirement of larger test point positions cannot be met.
Therefore, a system for detecting on/off of a wire harness is needed to meet the requirement of a larger test point location test.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a novel pencil break-make test system is not enough, detects the complicated problem of principle in order to solve current detector detection site.
The utility model provides a pencil break-make detecting system, its characterized in that: the method comprises the following steps: an input unit, a processor and a detection point position expansion unit,
the input unit is used for inputting the number of the detection wire harness to the processor;
the processor is used for receiving the serial number and detecting the on-off of the wire harness corresponding to the serial number according to the serial number;
the detection point location expansion unit is used for detecting the wire harness detection point location of the wire harness on-off detection system and is in communication connection with the processor;
the detection point location expansion unit comprises at least one bus I/O expander.
Further, the input unit comprises an upper computer and a communication module, and the upper computer is in communication connection with the processor through the communication module.
Further, the communication module adopts an RS232 serial port communication module.
Furthermore, the detection system also comprises a display module, wherein the display module is connected with the output end of the processor and used for receiving and displaying the signal of the processor.
Further, the I/O expanders PCF8575 are connected in parallel and then are in communication connection with the input/output ports of the processor.
Further, the bus I/O extender is PCF 8575.
Further, the processor adopts an ARM processor.
Further, the number of the bus I/O expander PCF8575 is 8.
The utility model has the advantages of: the detection points can be expanded to 6400 detection points through the detection point location expansion unit so as to solve the problem that the existing monitoring points are insufficient, and the detection principle provided by the system is simple and convenient to operate.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention is further explained by the following combined with the attached drawings of the specification:
fig. 1 is the structure diagram of the present invention, wherein, the number 1: an upper computer; sequence number 2: an RS232 serial port communication module; sequence No. 3: the lower computer embedded system takes ARM as a processor; number 4: the PCF8575 cascade IIC bus extends the IO port module.
The utility model provides a pair of pencil break-make detecting system, its characterized in that: the method comprises the following steps: an input unit, a processor and a detection point position expansion unit,
the input unit is used for inputting the number of the detection wire harness to the processor;
the processor is used for receiving the serial number and detecting the on-off of the wire harness corresponding to the serial number according to the serial number; the processor adopts an ARM processor; ARM (advanced RISC machines), a 32-bit Reduced Instruction Set (RISC) processor architecture, is widely used in many embedded system designs. The ARM processor has the characteristics of fixed instruction length, high execution efficiency, low cost and the like.
The detection point location expansion unit is used for detecting the wire harness detection point location of the wire harness on-off detection system and is in communication connection with the processor;
the detection point location expansion unit comprises at least one bus I/O expander. The existing 2000 monitoring points can be expanded to 6400 detection points through the expansion unit, and the number of the detection points is greatly increased.
In this embodiment, the input unit includes an upper computer and a communication module, and the upper computer is in communication connection with the processor through the communication module.
In this embodiment, the communication module adopts an RS232 serial port communication module.
In this embodiment, the detection system further includes a display module, and the display module is connected to the output end of the processor, and is configured to receive and display the signal of the processor.
The I/O expanders are PCF8575 connected in parallel and then connected with the input/output ports of the processor in a communication mode. The bus I/O expander is PCF 8575. The number of the bus I/O expander PCF8575 is 8.
Because the PCF8575 chip has three address bits of a0, a1, a2, eight addresses of "000", "001", "010", "011", "100", "101", "110", "111" can be combined, 8 PCF8575 chips are hung on a set of IIC bus, the specific method is that the SDA pins of the 8 PCF8575 chips are connected in parallel and then accessed to I/O port 0 of the processor, the SCL pins are connected in parallel and then accessed to I/O port 1, and then the two I/O ports generate IIC timing sequences through programming. 1 block PCF8575 has 16-bit input/output pins, so that a processor can control or read a total of 128 input/output pin levels (16 × 8 =) of the 8 blocks PCF8575 chip using only two I/O ports. At present, the number of the I/O ports of the ARM processor is as high as 100, even if the number of the I/O ports is calculated according to 100, after embedded programming, the number of the input/output pins which can be accurately controlled or read is as high as 6400 (100 ÷ 2 × 128 =), that is, 6400 detection points.
The novel wire harness on-off detection system comprises the following specific steps:
when the wiring harness loop is detected, the upper computer sends the serial number data of the detection points at the front end and the rear end of the current wiring harness loop to the lower computer embedded system through the RS232 serial port.
After the embedded system of the lower computer receives the serial number data of the detection point positions at the front end and the rear end, the processor sets the detection point at the front end to be a low level and sets all other detection points to be high levels according to a preset program.
Then the processor reads the level value of the rear-end detection point, if the level value of the rear-end detection point is low level, the rear-end detection point is indicated to be connected with the front-end detection point, the level of the rear-end detection point is pulled down by the front-end detection point to be low level, and the connection of the wiring harness loop is indicated to be successful; if the voltage is still high level, the back end detection point is not connected with the front end detection point, and the connection failure of the wiring harness loop is indicated.
If the current wiring harness is successfully connected, the lower computer embedded system sends the successfully connected information back to the upper computer through the RS232 serial port, and the upper computer skips to enter the detection of the next wiring harness loop after receiving the successful information; if the current wiring harness is failed to be connected, the lower computer embedded system continuously reads the level of the rear-end detection point until a wiring worker correctly modifies the wiring harness loop, the rear-end detection point is connected with the front-end detection point, and after the rear-end detection point is changed into low level, the lower computer embedded system sends the information of successful connection back to the upper computer through the RS232 serial port, so that the next wiring harness loop is detected.
And detecting one by one according to the steps, thereby realizing the on-off detection of the whole wire harness group.
By the technical scheme, the problems of multiple monitoring points and complex detection method can be effectively solved.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (8)
1. A pencil break-make detecting system which characterized in that: the method comprises the following steps: an input unit, a processor and a detection point position expansion unit,
the input unit is used for inputting the number of the detection wire harness to the processor;
the processor is used for receiving the serial number and detecting the on-off of the wire harness corresponding to the serial number according to the serial number;
the detection point location expansion unit is used for detecting the wire harness detection point location of the wire harness on-off detection system and is in communication connection with the processor;
the detection point location expansion unit comprises at least one bus I/O expander.
2. The wire harness on-off detection system according to claim 1, characterized in that: the input unit comprises an upper computer and a communication module, and the upper computer is in communication connection with the processor through the communication module.
3. The wire harness on-off detection system according to claim 2, characterized in that: the communication module adopts an RS232 serial port communication module.
4. The wire harness on-off detection system according to claim 1, characterized in that: the detection system further comprises a display module, wherein the display module is connected with the output end of the processor and used for receiving and displaying the signal of the processor.
5. The wire harness on-off detection system according to claim 1, characterized in that: the I/O expanders are PCF8575 connected in parallel and then connected with the input/output ports of the processor in a communication mode.
6. The wire harness on-off detection system according to claim 1, characterized in that: the bus I/O expander is PCF 8575.
7. The wire harness on-off detection system according to claim 1, characterized in that: the processor adopts an ARM processor.
8. The wire harness on-off detection system according to any one of claims 1 or 6, characterized in that: the number of the bus I/O expander PCF8575 is 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921929535.1U CN211348592U (en) | 2019-11-11 | 2019-11-11 | Wiring harness on-off detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921929535.1U CN211348592U (en) | 2019-11-11 | 2019-11-11 | Wiring harness on-off detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211348592U true CN211348592U (en) | 2020-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921929535.1U Active CN211348592U (en) | 2019-11-11 | 2019-11-11 | Wiring harness on-off detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211348592U (en) |
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2019
- 2019-11-11 CN CN201921929535.1U patent/CN211348592U/en active Active
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