Automatic cable detection equipment based on PLC (Programmable Logic Controller)

Abstract

The utility model discloses a PLC-based cable automatic detection device, comprising an inspection unit which comprises a box body, and a programmable logic controller PLC, a circuit breaker and a power supply module which are arranged in the box body, the programmable logic controller PLC is connected with the circuit breaker and the power supply module, and the power supply module is connected with the box body; the programmable logic controller PLC comprises a programmable controller and an expansion module which are connected with each other, the programmable controller is electrically connected with a detected cable through an outgoing cable, and the expansion module performs signal point position expansion according to a received detection signal; and the upper control unit is connected with the inspection unit through a communication cable, and the upper control unit is used for displaying the detection window, the result display window, the detection recording window, the circuit principle monitoring data state and the communication state. The elevator cable wiring device is specially used for elevator cable wiring and function detection, and the situation that the elevator cable function cannot meet the normal operation requirement of an elevator due to manual wiring errors is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator cable detection, in particular to a PLC-based automatic cable detection device. Background Art

[0002] In the operation and control of elevators, elevator cables are the bridge between the elevator control system and the drive system, responsible for signal and power transmission. It ensures that the elevator runs smoothly according to the predetermined program and is the key to the normal operation of the elevator. It not only provides power for the elevator's drive motor, but also transmits various control signals, such as instructions from the control cabinet, intercom lines, feedback lines for monitoring the elevator status, etc. The integrity and correctness of the elevator cable are crucial to the safe operation of the elevator, and reliable detection devices are needed to ensure the normal operation of the elevator cable.

[0003] The circuit principles of elevator cables in the existing market are relatively complex and diverse. Most of the products are tested by manual inspection or simple test tools. In particular, when manual inspection is used, inspectors need to use a multimeter to perform point-to-point inspection of the elevator cable wiring according to the circuit schematic diagram. There is a lack of more convenient inspection methods and a human-computer interaction interface for quick operation, which leads to long inspection time, low efficiency, no registration of inspection records, and inability to trace defects. The use of simple test tools can only target elevator cables with a certain circuit principle.

[0004] Circuit principle wiring errors, short circuits / false connections will directly cause the elevator to malfunction and cannot operate, and may even cause safety accidents, bringing great safety hazards and troubles to the operation, commissioning and maintenance of the elevator. Therefore, it is necessary to design a detection device that can quickly detect cables to detect whether the cable electrical wiring is correct. At the same time, the detection device can be compatible with cables with different circuit principles. Utility Model Content

[0005] The technical problem to be solved by the present application is that most of the existing technologies use manual detection, which requires inspectors to use a multimeter or a conductive pen to perform point-to-point detection of the cable wiring against the circuit schematic, or use the recommended tooling for testing, which makes it difficult to achieve automatic detection and the effect of quickly switching test products.

[0006] To solve the above technical problems, the present application provides a cable automatic detection device based on a PLC, including: an inspection unit, including a box body and a programmable logic controller PLC, a circuit breaker, and a power supply module installed in the box body. The programmable logic controller PLC is connected to the circuit breaker and the power supply module. The programmable logic controller PLC includes a programmable controller and an expansion module connected to each other. The programmable logic controller PLC is electrically connected to the cable to be detected through a lead-out cable; an upper control unit, connected to the inspection unit through a communication cable, and the upper control unit is used to display a detection window, a result display window, a detection record window, the monitoring data status and communication status of each circuit principle; wherein, the expansion module includes a point digital input module and a point digital output module. The point digital output module is used as the output part of the inspection unit to send out detection signals, and the point digital input module is used as the input part of the inspection unit to receive detection signals. The detection signals are output by the point digital output module, received by the point digital input module after passing through the cable to be detected, and the received detection signals are processed by the programmable controller and then output to the upper control unit by the programmable controller through a serial communication line.

[0007] According to an embodiment of the present application, the programmable logic controller PLC transmits the detection results record and judgment of each expanded point to the upper control unit through a communication cable.

[0008] According to an embodiment of the present application, the control unit further includes a display and a control host respectively electrically connected to the power supply, and the output ends of the programmable logic controller PLC are respectively electrically connected to the display and the control host.

[0009] According to an embodiment of the present application, the control host includes a database, and the control host controls the detection actions of the inspection unit through serial communication.

[0010] According to an embodiment of the present application, the programmable logic controller PLC, the circuit breaker, and the power supply module are arranged in a matrix in the box body.

[0011] According to an embodiment of the present application, a cable outlet is provided on the side of the box body.

[0012] According to an embodiment of the present application, the lead-out cable access plug transmits the signal to the corresponding programmable controller point.

[0013] According to an embodiment of the present application, the power supply module is an AC 220V to DC 24V switching power supply.

[0014] According to an embodiment of the present application, the model of the programmable controller is Inovance H3U3232MR, and the models of the expandable modules are GL10-3200END point digital input module and GL10-0032ETN point digital output module.

[0015] According to an embodiment of the present application, the lead-out cable includes an extension cable and a conversion cable that can be replaceably connected thereto.

[0016] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0017] 1. When using the automatic detection device of the present utility model for detection, it is no longer necessary for inspectors to use a multimeter or other simple tools such as a continuity pen to conduct point-to-point detection of the cable wiring against the circuit schematic diagram. The lead-out cable of the lower computer can be quickly connected to the cable to form a detection loop between the lower computer and the cable, directly detecting whether the cable wiring is correct. At the same time, it can also quickly switch the detection according to the circuit principle pre-saved manually or in the system in the database, meeting the detection requirements of cables with different circuit principles at the same time.

[0018] 2. The present utility model adopts an upper control unit connected to a lower inspection unit to realize automatic detection and human-computer interactive detection of cable problems, ensuring the avoidance of errors during assembly. The present application can also conduct line testing on the elevator cable before leaving the factory, which on the one hand ensures the product quality, and on the other hand avoids losses caused by poor after-sales handling.

[0019] 3. The present utility model is dedicated to the wiring and function detection of elevator cables. By connecting the lead-out cable of the lower computer to the detector, it has the advantages of being able to conduct human-computer interaction, quick switching, safety and reliability, avoiding the situation that the functions of elevator cables cannot meet the requirements of normal elevator operation due to manual wiring errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application and do not limit the present application.

[0021] Figure 1 It is a schematic structural diagram of the lower inspection unit of a cable automatic detection device based on PLC according to an example of the present utility model;

[0022] Figure 2 It is a schematic diagram of the line connection of a cable automatic detection device based on PLC according to an example of the present utility model.

[0023] The description of the reference numerals is as follows:

[0024] 1. Power supply module, 2. Circuit breaker, 3. Programmable logic controller, 4. Expansion module, 4a. Digital input module, 4b. Digital output module, 5. Box body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of this application without creative efforts shall fall within the scope of protection of this application.

[0026] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which this application pertains. The terms "first", "second" and similar terms used in the patent application specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms "a" or "an" and the like do not denote a limitation of quantity, but mean that there is at least one.

[0027] The utility model can be quickly connected to the cable to be detected through the lead-out cable of the lower computer, so that the circuits of the lower computer and the cable to be detected form a detection loop, directly detecting whether the wiring of the cable to be detected is correct. At the same time, it can also perform quick switching detection according to the circuit principles pre-manually or system-stored in the database, meeting the detection requirements of cables with different circuit principles.

[0028] According to Figures 1 to 2 As shown, an automatic cable detection device based on PLC according to an example of the utility model includes a lower inspection unit and an upper control unit. Compared with most of the prior art which uses manual detection and is difficult to achieve the effects of automatic detection and quick switching of test products, this application can be quickly connected to the cable to be detected through the lead-out cable of the lower computer, so that the circuits of the lower inspection unit and the cable to be detected form a detection loop, directly detecting whether the wiring of the cable to be detected is correct. At the same time, it can also perform quick switching detection according to the circuit principles pre-manually or system-stored in the database, meeting the detection requirements of cables with different circuit principles.

[0029] In this embodiment, the inspection unit includes a box body 5 and a programmable logic controller PLC, a circuit breaker 2 and a power module 1 installed in the box body 5. The programmable logic controller PLC is connected to the circuit breaker 2 and the power module 1. The programmable logic controller PLC includes a programmable controller 3 and an expansion module 4 connected to each other. The programmable logic controller PLC is electrically connected to the cable to be detected through a lead-out cable, and the expansion module 4 expands signal points according to the received detection signals.

[0030] Specifically, as Figure 2As shown in the figure, the lead cable is connected to the plug of the cable to be detected, and the signal sent by the digital output module 4b at the midpoint of the expansion module 4 of the programmable logic controller (PLC) is transmitted into the digital input module 4a at the midpoint of the expansion module 4 of the PLC through the cable to be detected. According to the number and type of I / O points of the detection signal, the programmable controller 3 can expand the signal points through expansion modules of the same type, and perform signal detection and processing through the programmable controller 3. The detection results are transmitted to the upper control unit through the serial communication cable of the PLC, and the detection results of each point are recorded and judged. Among them, the lead cable of the inspection unit can also be replaced at any time, and is quickly connected to the cable to be detected through the lead cable, so that the circuit of the inspection unit and the cable to be detected forms a detection loop.

[0031] Specifically, the lead cable includes an extension cable and a conversion cable that can be replaceably connected thereto. The detection unit is in contact conduction with the plug of the cable to be detected through the extension cable and the conversion cable. According to the different plugs of the cable to be detected, the corresponding conversion cable can be replaced, and the application range is wide.

[0032] Specifically, the model of the programmable controller 3 is Inovance H3U3232MR, and the models of the expansion module 4 are GL10-3200END point digital input module and GL10-0032ETN point digital output module. The model of this application is not limited, and other suitable models can also be selected. The programmable controller 3 can expand the signal points through expansion modules of the same type.

[0033] Specifically, the power module 1 is preferably an AC 220V to DC 24V switching power supply.

[0034] The upper control unit is connected to the inspection unit through a communication cable. The upper control unit is used to display the detection window, result display window, detection record window, monitoring data status of each circuit principle, and communication status.

[0035] Specifically, the control unit further includes a display and a control host respectively electrically connected to the power supply. The serial communication port of the PLC is connected to the control host. The control host further includes a database, and the database stores the electrical principle. The control host is connected to the inspection unit through serial communication, controls the detection actions of the inspection unit according to the electrical principle program, and the control host also reads the detection results of the lower inspection unit and performs logical analysis with the local database and then displays the status on the corresponding interface of the display.

[0036] Specifically, the PLC, the circuit breaker 2, and the power module 1 are arranged in a matrix in the box 5, as Figure 1As shown in the figure, the power module 1, the circuit breaker, the programmable controller 3, and the expandable module 4 are neatly arranged in the box body 5 from top to bottom in sequence, making the inspection, the overall design of the unit neat and the circuit simple. At the same time, a cable outlet is provided on the side of the box body 5 for the lead-out cable to extend out.

[0037] In this embodiment, the working process of the upper control unit of a cable automatic detection device based on PLC is as follows:

[0038] 1. When the upper control unit is powered on, the corresponding data bits are initialized and the program starts to execute;

[0039] 2. Display the detection window and wait for one of the detection button, detection record button, result display button, and close detection window to be pressed:

[0040] 2.1. When the detection button is pressed, the program starts to execute the detection: ① Retrieve the logic from the database; ② Control the lower computer to perform the detection according to the retrieved logic; ③ Read the detection result of the lower computer; ④ Display the result and return to step 2 to wait for the next instruction;

[0041] 2.2. When the detection record button is pressed: ① Display the detection record window and display all detection records; ② Confirm whether the user modifies the screening conditions; ③ If modified, update the displayed detection records and then confirm whether the user closes the detection record window, otherwise directly confirm whether the user closes the detection record window; ④ If the detection record window is closed, return to step 2 to wait for the next instruction, otherwise return to step ②;

[0042] 2.3. When the result display button is pressed: ① Display the result display window; ② Wait for the user to close the result display window and return to step 2 to wait for the next instruction.

[0043] 3. Confirm whether the user closes the detection window. If not, return to step 2 to wait for the next instruction. If so, exit the upper computer system

[0044] In summary, the technical solution of this application has the following beneficial effects:

[0045] 1. When using the automatic detection device of the present utility model for detection, it is no longer necessary for inspectors to use a multimeter or other simple tools such as a continuity pen to perform point-to-point detection on the cable wiring with reference to the circuit schematic diagram. The lower computer can be quickly connected to the cable through the lead-out cable, so that the circuit of the lower computer and the cable forms a detection loop, directly detecting whether the cable wiring is correct. At the same time, it can also quickly switch the detection according to the circuit principle pre-saved manually or in the system in the database, meeting the detection requirements of cables with different circuit principles at the same time.

[0046] 2. The utility model adopts an upper control unit connected to a lower inspection unit to realize automatic detection and human-computer interactive detection of cable problems, ensuring the avoidance of errors during assembly. This application can also conduct line tests on elevator cables before leaving the factory, which on the one hand ensures the product quality, and on the other hand avoids losses caused by poor after-sales handling.

[0047] 3. The utility model is specifically used for the wiring and function detection of elevator cables. It is connected to a detector through the lead-out cable of the lower computer, and has the advantages of being able to conduct human-computer interaction, quickly switch, and being safe and reliable, avoiding the situation that the functions of elevator cables cannot meet the requirements of normal elevator operation due to manual wiring errors.

[0048] The above is only an exemplary implementation manner of this application, rather than being used to limit the protection scope of this application. The protection scope of this application is determined by the appended claims.

Claims

1. An automatic cable detection device based on PLC, characterized in that Including: A checking unit, including a box body, a programmable logic controller (PLC), a circuit breaker and a power supply module installed in the box body. The programmable logic controller (PLC) is connected to the circuit breaker and the power supply module. The programmable logic controller (PLC) includes a programmable controller and an expansion module connected to each other. The programmable logic controller (PLC) is electrically connected to the cable to be detected through a lead-out cable; An upper control unit, connected to the checking unit through a communication cable. The upper control unit is used to display a detection window, a result display window, a detection record window, the monitoring data status of each circuit principle and the communication status; Among them, the expansion module includes a point digital input module and a point digital output module. The point digital output module is used as the output part of the checking unit to send out detection signals. The point digital input module is used as the input part of the checking unit to receive detection signals. The detection signals are output by the point digital output module, received by the point digital input module after passing through the cable to be detected, and the received detection signals are processed by the programmable controller and then output to the upper control unit by the programmable controller through a serial communication line.

2. The cable automatic detection device based on PLC according to claim 1, characterized in that, The programmable logic controller (PLC) records and judges the detection results of each expanded point through the communication cable and transmits them to the upper control unit.

3. An automatic cable detection device based on PLC according to claim 1, characterized in that, The control unit further includes a display and a control host respectively electrically connected to the power supply. The output ends of the programmable logic controller (PLC) are respectively electrically connected to the display and the control host.

4. An automatic cable detection device based on PLC according to claim 3, characterized in that The control host includes a database, and the control host controls the detection actions of the checking unit through serial communication.

5. An automatic cable detection device based on PLC according to claim 1, characterized in that, The programmable logic controller (PLC), the circuit breaker and the power supply module are arranged in a matrix in the box body.

6. An automatic cable detection device based on PLC according to claim 1, characterized in that, A cable outlet is provided on the side of the box body.

7. An automatic cable detection device based on PLC according to claim 1, characterized in that, The lead-out cable accesses the plug connector to transmit the signal to the corresponding programmable controller point.

8. An automated cable detection device based on a PLC according to claim 1, characterized in that, The power supply module is an AC 220V to DC 24V switching power supply.

9. An automatic cable detection device based on PLC according to claim 1, characterized in that, The model of the programmable controller is Inovance H3U3232MR, and the models of the expandable modules are GL10-3200END point digital input module and GL10-0032ETN point digital output module.

10. An automated cable detection device based on a PLC according to claim 1, characterized in that, The lead-out cable includes an extension cable and a conversion cable that can be replaceably connected to it.

Images