CN219105076U

CN219105076U - Portable cable on-off detection circuit and detector using single-wire communication

Info

Publication number: CN219105076U
Application number: CN202223399257.8U
Authority: CN
Inventors: 王宗贵; 刘志佳; 庞喜帅; 冯明飞
Original assignee: Jiangsu Huatu Cnc Technology Co ltd
Current assignee: Jiangsu Huatu Cnc Technology Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-05-30
Anticipated expiration: 2032-12-19

Abstract

The utility model discloses a portable cable on-off detection circuit and a detector using single-wire communication, wherein an aviation plug adapter plate and a cable terminal bottom plate are respectively connected at two ends of a multi-core cable to form an on-off detection loop, a signal acquisition plate and a main controller are connected through an RS232 serial port cable to perform signal intercommunication, a level output port of the signal acquisition plate is connected with an input port of the aviation plug adapter plate through an output IO connecting cable, and an output port of the cable terminal bottom plate is connected with a level acquisition port of the signal acquisition plate through an input IO connecting cable. The utility model realizes point-to-point test, simplifies the detection process, reduces the labor and time cost, and effectively improves the detection accuracy.

Description

Portable cable on-off detection circuit and detector using single-wire communication

Technical Field

The utility model relates to the technical field of cable testing, in particular to a portable cable on-off detection circuit and a detector using single-wire communication.

Background

The requirements of different customers generate various wiring definitions of the cables, and after the on-site wire production and processing are finished, the on-off of the cables needs to be checked and judged.

The current common cable on-off detection mode is to use a buzzer of a universal meter for measurement or an electrician meter pen for measurement, a detector needs to search a stitch point corresponding to each line color according to wiring definition, and the method can only conduct on-off detection on the wire cores one by one. Because the color of the wire core wires is similar (such as light green and black/light green and yellow), errors are caused by visual errors when the wire core wires are manually searched, and the wire core wires need to be reworked, so that inconvenience exists, and the time and the labor are consumed.

When the conventional multimeter is used, two multimeter pens are required to be placed at two ends of a cable respectively, and knotting is often generated due to longer lead wires of the multimeter pens, so that the operation is complicated.

Because the cables are required to be generated by different clients, a plurality of wiring definitions exist, and the workload is high and the efficiency is low when personnel search the definitions.

Disclosure of Invention

The utility model aims to: aiming at the defects of the prior art, the utility model provides the portable cable on-off detection circuit and the detector using single-wire communication, which can detect various types of cables, are simple to operate, save labor cost and improve detection efficiency.

The technical scheme is as follows: the portable cable on-off detector utilizing single-wire communication is suitable for on-off detection of a multi-core cable, and comprises a main controller, a signal acquisition board, an aviation plug adapter board and a cable terminal bottom board; the aviation plug adapter plate and the cable terminal bottom plate are respectively connected at two ends of the multi-core cable to form an on-off detection loop, the signal acquisition plate and the main controller are in signal communication after being connected through an RS232 serial port cable, the level output port of the signal acquisition plate is connected with the input port of the aviation plug adapter plate through an output IO connecting cable, and the output port of the cable terminal bottom plate is connected with the level acquisition port of the signal acquisition plate through an input IO connecting cable.

The main controller outputs a test request signal to the signal acquisition board, after the signal acquisition board level conversion, the port of the aviation plug adapter board connected with one end of the multi-core cable is set to be high level, the signal acquisition board acquires the level of the cable terminal bottom plate connected with the other end of the multi-core cable, the acquisition result is transmitted to the main controller, and the main controller judges whether the on-off state of the cable is qualified or not.

The technical scheme is further perfected, and the cable terminal bottom plate is connected with the multi-core cable through an external type terminal plate.

Further, the main controller is connected with a display screen and is used for receiving the input of the test request signal and displaying and outputting the acquisition result.

Further, the main controller adopts TI3352 CPU and is externally connected with a display screen.

Further, the signal acquisition board adopts STM32.

The utility model also provides a portable cable on-off detector using single-wire communication, which comprises a base, an upper cover and a lower cover which are respectively arranged at the top and the bottom of the base; the portable cable on-off detection circuit utilizing single-wire communication is integrated in the base.

The beneficial effects are that: compared with the prior art, the utility model has the advantages that: the two ends of the cable to be tested are respectively connected between the aviation plug adapter plate and the cable terminal bottom plate to form an on-off detection loop; the main controller outputs a test request signal, the test request signal is converted by the signal acquisition board and then is output to the aviation plug adapter board, and then the test request signal is fed back to the number limiting acquisition board by the cable terminal base board, the main controller judges the electric levels at two ends of the aviation plug adapter board and the cable terminal base board, and the test result is output, so that the point-to-point test is realized, the test procedure is simplified, the labor and time cost is reduced, and the test accuracy is effectively improved. The display screen that connects through main control unit selects the test cable, has solved operating personnel and has led to selecting the wrong problem of look and define because of the wiring because of the vision error is many, and artifical problem that the work load of looking for line color is big.

Drawings

FIG. 1 is a block diagram of the circuit connections of the present utility model;

FIG. 2 is a schematic illustration of the physical connection of the present utility model;

FIG. 3 is a schematic view of the overall structure of the present utility model;

FIG. 4 is a level shifting circuit of the signal acquisition board to the master controller output signal;

FIG. 5 is a level shifter circuit with a signal acquisition board outputting two paths of signals to a main controller;

fig. 6 is a level shift circuit of the signal acquisition board feeding back two signals to the main controller.

In the figure: 1. an upper cover; 2. a base; 3. a lower cover; 11. a main controller; 12. a signal acquisition board; 13. aviation plug adapter plate; 14. a first type terminal board; 15. a second type terminal board; 16. a cable terminal bottom plate; 21. 232 serial port cable; 22. input IO connection cable; 23. a cable to be tested; 24. the terminal is plugged and pulled out; 25. a second terminal is plugged and pulled out; 26. and outputting an IO connection cable.

Detailed Description

The technical scheme of the utility model is described in detail below through the drawings, but the protection scope of the utility model is not limited to the embodiments.

Example 1: the portable cable on-off detection circuit using single-wire communication shown in fig. 1 comprises a main controller 11, a signal acquisition board 12, a cable terminal bottom board 16, an aviation plug adapter board 13, a first model terminal board 14 and a second model terminal board 15.

1. The main controller 11 adopts TI3352 CPU, is connected with an 8-inch liquid crystal screen, uses a test interface developed by QT, integrates display, communication and data judging functions, realizes the functions of testing cable disconnection, short circuit and dislocation, and can be compatible with cable tests of various types. The cable definition can be edited through an interface, so that the diversity of the test logic is realized; then the cable terminal bottom plate 16, the first model terminal plate 14 and the second model terminal plate 15 realize the diversity of cable types; thus, the combination realizes compatibility of various cables and definitions.

2. The MCU scheme of STM32 is used by the signal acquisition board 12, the aviation plug adapter board and the cable terminal bottom board of the test cable are connected to IO of the signal acquisition board, the long-distance cable signal is not attenuated through the acquisition circuit, and acquired data are transmitted to the main controller.

3. The cable terminal bottom plate 16 is a bottom plate platform of a 3*6 test terminal, a plurality of terminal connection areas are reserved on the bottom plate, functions of different positions are the same, the type terminal plate can be inserted, the terminal plate defined by different types can be quickly inserted onto the bottom plate, and the test compatible with various custom type terminals is realized.

4. The aerial plug adapter plate 13 enables the connection of a variety of different aerial plugs for cable testing.

5. The first and second

model terminal plates

14 and 15 are connected to the cable terminal bottom plate 16 by first and

second terminal plugs

24 and 25, respectively. Because a plurality of defined terminals exist in reality, and the definition of a new terminal model is possibly added, the test can be realized by only adding a new model terminal board and defining the new model terminal board.

Working principle: the two ends of the cable 23 to be tested are respectively connected with the cable terminal bottom plate 16 and the aviation plug adapter plate 13, communication is realized by connecting the main controller 11 and the signal acquisition plate 12 through the RS232 serial port cable 21, the level output port of the signal acquisition plate 12 is connected with the input port of the aviation plug adapter plate 13 through the input IO connecting cable 22, the output port of the cable terminal bottom plate 16 is connected with the level acquisition port of the signal acquisition plate 12 through the output IO connecting cable 26, the long-distance cable signal is not attenuated, and the acquired data are transmitted to the main controller 11.

The main controller 11 sends request test data through an RS232 protocol, after receiving the data, the signal acquisition board 12 outputs high level through the port of the aviation plug adapter board through the level conversion circuit, the signal acquisition board 12 acquires the level of the output port of the cable terminal bottom board again, and then feeds back the data to the main controller; the main controller 11 performs data analysis to give a test result.

Example 2: the detector comprising the detection circuits shown in fig. 1 and 2 comprises a base 2, an upper cover 1 and a lower cover 3 respectively arranged at the top and the bottom of the base 2, as shown in fig. 3; the base 2 is integrated with a portable cable on-off detection circuit using single-wire communication. Because the cable terminals have various types, the upper cover is reserved with the positions, and various terminal boards can be installed at the same time, and the terminal adapter board needs to be replaced once without measuring cables of one type.

Example 3: the total number of cables of the multi-core cable is fixed, but the definition of each cable port is different, exemplified by the port test of one of the multi-core cables: and connecting the two ends of the multi-core cable to be tested with the aviation plug adapter plate and the cable terminal bottom plate respectively.

As shown IN fig. 4, after the main controller 11 starts to request test data and the stm32_in1 port of the main controller 11 is set to a high level (3.3V), the IN1 port becomes 24V after being converted by the level conversion circuit of the

signal acquisition board

12, and 24V of the IN1 port is output to the aviation plug adapter board port connected to the corresponding cable. After the transmission of the cable 23 to be tested, the port of the cable terminal bottom plate 16 will detect the high level, so as to realize that the cable signal with long distance is not attenuated, at this time, the signal acquisition board 12 will transmit the data of the high level port to the main controller 11, and the main controller performs cable judgment according to the returned level signal.

Example 4: the interface of the main controller 11 edits the position number of the cable to be tested, and clicks a start test button:

take line 1 as an example: the main controller sends 'No. 1 line' request test data through an RS232 protocol, after receiving the data, the signal acquisition board outputs high level from the port of the aviation plug adapter board of the 'No. 1 line', and then the signal acquisition board detects the level of the output port of the cable terminal bottom plate again, and then the data is fed back to the main controller; if the fed-back data is only high level on the '1 line', the '1 line' tests OK; if the fed-back data is the high level of the 'No. 2 line', judging that the 'No. 1 line' and the 'No. 2 line' are misplaced; if the fed-back data is that the '1 wire' and the '2 wire' are both in high level, judging that the '1 wire' and the '2 wire' are short-circuited; if the data fed back is not high, line 1 is open.

As shown IN fig. 5 and 6, if a test of the '1 line is requested, the' main control 11 sends data 0x01 to the signal acquisition board 12, and after the signal acquisition board 12 receives the data 0x01, the stm32_in1 port is pulled high, and at this time, the IN1 port outputs 24V level; if the cable 1 wire is conducted, the OUT1 will become 24V level, the STM32_OUT1 port will become 3.3V high level, then the signal acquisition board 12 will return data 0x01 to the main controller 11, and after the main controller 11 receives the data, the main controller 11 will determine that the cable 1 is qualified.

If the line 1 is not passed, the OUT1 will not become 24V, the stm32_out1 port is still at a low level, and then the signal acquisition board 12 will return data 0x00 to the main controller 11, and after the main controller 11 receives the data, the line 1 will be judged to be open.

If the

wires

1 and 2 are shorted, the wires OUT1 and OUT2 will both become 24V, the ports of the singlechips stm32_out1 and stm32_out2 will both become high level (3.3V), then the signal acquisition board 12 will return the data 0x03 to the main controller 11, and after the main controller 11 receives the data, the main controller 11 will determine that the

wires

1 and 2 are shorted.

And testing other wires according to the logic of the test No. 1 wire, and finally obtaining the result of the whole cable.

As described above, although the present utility model has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the utility model itself. Various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A portable cable on-off detection circuit using single-wire communication is applicable to on-off detection of a multi-core cable, and is characterized in that: the device comprises a main controller, a signal acquisition board, an aviation plug adapter board and a cable terminal bottom board;

the aviation plug adapter plate and the cable terminal bottom plate are respectively connected at two ends of the multi-core cable to form an on-off detection loop, the signal acquisition plate and the main controller are in signal communication after being connected through an RS232 serial port cable, the level output port of the signal acquisition plate is connected with the input port of the aviation plug adapter plate through an output IO connecting cable, and the output port of the cable terminal bottom plate is connected with the level acquisition port of the signal acquisition plate through an input IO connecting cable.

2. The portable cable on-off detection circuit utilizing single wire communication according to claim 1, wherein: the cable terminal bottom plate is connected with the multi-core cable through an external type terminal plate.

3. The portable cable on-off detection circuit utilizing single wire communication according to claim 1, wherein: the main controller is connected with a display screen and is used for receiving the input of the test request signal and displaying and outputting the acquisition result.

4. A portable cable on-off detection circuit utilizing single wire communication as set forth in claim 3, wherein: the main controller adopts TI3352 CPU and is externally connected with a display screen.

5. The portable cable on-off detection circuit utilizing single wire communication as set forth in claim 4, wherein: the signal acquisition board adopts STM32.

6. A portable cable on-off detector using single-wire communication is characterized in that: comprises a base, an upper cover and a lower cover which are respectively arranged at the top and the bottom of the base; the portable cable on-off detection circuit using single-wire communication is integrated in the base.