Switch detection device and system

Abstract

The invention provides a switch detection device and system, and relates to the field of electronic equipment detection, and the device comprises a detection control module which is configured to use a target current to detect the function state of a target switch, and the target current is a current which accords with the setting of the target switch; and the power supply module is electrically connected with the detection control module and is configured to provide target current for the detection control module.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electronic device detection, and in particular to a switch detection device and system. BACKGROUND

[0002] A proximity switch is a position switch that can be operated without mechanical direct contact with the moving part. When the sensing surface of the proximity switch senses the action distance of the object, it does not need direct mechanical contact and any pressure to change the action of the proximity switch, thereby driving the direct current electrical appliance or providing corresponding control instructions to the programmable controller (PLC) device.

[0003] In actual application, the use scene of the proximity switch is wide, for example, a continuous rolling mill device used in the production process of a steel coil. A large number of proximity switches are arranged in the continuous rolling mill. In the maintenance process for the production site, not only the function of the continuous rolling mill itself is maintained, but also whether the proximity switches in the continuous rolling mill can normally display is maintained.

[0004] In the process of detecting whether the proximity switch is normal during maintenance, the online dotting method is usually used to judge the good and bad. The current dotting method needs the entire system of the PLC to the external line to keep powered on, that is, the test line is powered on, the PLC system is powered on, and the monitoring computer is powered on, which leads to that the maintenance can only be performed before the energy isolation (a protective measure that cuts off all media such as wind, water, and electricity in the scene, so that the scene device cannot run completely) or after the energy isolation is completely restored, which affects the overall energy isolation time or plan, thereby leading to a long production cycle. SUMMARY

[0005] Embodiments of the present application provide a switch detection device and system, which are used to solve the problem that the maintenance of the proximity switch needs the production system to keep powered on, which affects the production cycle in the related art.

[0006] In a first aspect, embodiments of the present application provide a switch detection device, which comprises: A detection control module configured to detect the function state of a target switch using a target current, wherein the target current is a current set for the target switch. A power supply module electrically connected to the detection control module and configured to provide the target current to the detection control module.

[0007] Optionally, the detection control module comprises: A current control unit electrically connected to the power supply module and configured to output the target current according to the connection of the current terminal before the function state of the target switch is detected using the target current. The switch type control rocker is configured to adjust a display state of the switch type control rocker according to a transistor type of the target switch before detecting a functional state of the target switch using the target current.

[0008] Optionally, the detection control module further comprises: The state indicating lamp is configured to display an output state corresponding to the switch type according to the switch type of the target switch during the detection of the functional state of the target switch using the target current.

[0009] Optionally, the state indicating lamp is configured to: If the switch type of the target switch is the normally open type and there is no obstruction in front of the target switch, the state indicating lamp is in the light-off state, and the switch type includes the normally open type. If the switch type of the target switch is the normally open type and there is an obstruction in front of the target switch, the state indicating lamp is in the light-on state.

[0010] Optionally, the state indicating lamp is configured to: If the switch type of the target switch is the normally closed type and there is no obstruction in front of the target switch, the state indicating lamp is in the light-on state, and the switch type further includes the normally closed type. If the switch type of the target switch is the normally closed type and there is an obstruction in front of the target switch, the state indicating lamp is in the light-off state.

[0011] Optionally, the power supply module comprises: A battery pack for providing stable direct current. A power converter electrically connected to the battery pack and the detection control module, for converting the stable direct current provided by the battery pack into the target current used by the detection control module when detecting the functional state of the target switch.

[0012] Optionally, the switch detection device further comprises: A box body arranged outside the switch detection device and configured to wrap the detection control module and the power supply module.

[0013] Optionally, the switch detection device further comprises: A corrosion-free coating arranged outside the box body and configured to protect the box body.

[0014] In a second normally closed aspect, an embodiment of the present application provides a switch detection system, which comprises: A continuous rolling mill comprising a plurality of target switches; A switch detection device connected to the continuous rolling mill, wherein the device is the switch detection device as described in the first normally open aspect.

[0015] Optionally, when the continuous rolling mill is in a power-off state, the switch detection device sequentially uses a target current to detect the functional status of the target switch, wherein the target current is a current that conforms to the setting of the target switch.

[0016] The switch detection device provided according to an embodiment of the present invention includes: a detection control module configured to detect the functional state of a target switch using a target current, wherein the target current is a current that conforms to the setting of the target switch; and a power supply module electrically connected to the detection control module and configured to provide the target current to the detection control module. Thus, the power supply module of the switch detection device can provide the detection control module with a target current conforming to the setting of the target switch, facilitating the detection of the functional state of the target switch by energizing it separately, without needing to power on the entire production site system. This avoids affecting the overall energy isolation time or schedule, and to some extent solves the problem in related technologies where maintaining the production system in a powered-on state is required for the maintenance of proximity switches, thus affecting the production cycle. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This invention illustrates the structural concept of a switch detection device provided in an embodiment of the present invention; Figure 2 This invention illustrates another structural concept of a switch detection device provided by an embodiment of the present invention; Figure 3 This illustrates a structural concept of a detection control module provided by an embodiment of the present invention; Figure 4 This invention illustrates the structural concept of a switch detection system provided by an embodiment of the present invention; Figure 5 This illustrates a scenario application of a switch detection system provided by an embodiment of the present invention. Detailed Implementation

[0019] As described in the background section, a proximity switch is a position switch that can be operated without direct mechanical contact with moving parts. When the sensing surface of the proximity switch detects the moving distance of an object, it can change the action of the proximity switch without direct mechanical contact or the application of any pressure, thereby driving DC electrical appliances or providing corresponding control instructions to programmable controllers (PLCs). In practical applications, proximity switches are widely used, such as in continuous rolling mills used in the production of steel coils, where a large number of proximity switches are installed inside the rolling mill. During maintenance of the production site, it is necessary not only to inspect the function of the rolling mill itself but also to check whether the proximity switches inside the rolling mill are functioning properly.

[0020] During maintenance, the proper functioning of proximity switches is typically determined using online monitoring. However, this current monitoring method requires the entire system from the PLC to the external wiring to be powered on. This necessitates powering on the test lines, the PLC system, and the monitoring computer. Consequently, maintenance can only be performed before energy isolation (a protective measure that completely disables on-site equipment by cutting off all electrical and ventilation systems) or after energy isolation is fully restored. This impacts the overall energy isolation time or schedule, leading to excessively long production cycles.

[0021] The switch detection device provided according to an embodiment of the present invention includes: a detection control module configured to detect the functional state of a target switch using a target current, wherein the target current is a current that conforms to the setting of the target switch; and a power supply module electrically connected to the detection control module and configured to provide the target current to the detection control module. Thus, the power supply module of the switch detection device can provide the detection control module with a target current conforming to the setting of the target switch, facilitating the detection of the functional state of the target switch by energizing it separately, without needing to power on the entire production site system. This avoids affecting the overall energy isolation time or schedule, and to some extent solves the problem in related technologies where maintaining the production system in a powered-on state is required for the maintenance of proximity switches, thus affecting the production cycle.

[0022] In addition, the current monitoring method requires the entire system from the PLC to the external line to be kept powered on. Besides the above-mentioned problems, maintenance personnel and other construction personnel in the continuous rolling mill are also at risk of electric shock. Furthermore, during maintenance and testing, on-site maintenance personnel and monitoring personnel need to cooperate remotely, which leads to problems of untimely communication and efficiency.

[0023] The switch detection device provided in this embodiment of the invention allows for the supply of a target current matching the target switch's settings to the detection control module via its power supply module. This facilitates the independent energization of the target switch to detect its functional status, eliminating the need to power the entire production system. Consequently, even without a power source, on-site maintenance personnel can independently complete the testing. This not only reduces the risk of electric shock for maintenance personnel and other workers in the continuous rolling mill but also solves the problem of inefficient communication during multi-person maintenance. The switch detection device provided in this embodiment of the invention improves the safety and efficiency of proximity switch maintenance to a certain extent.

[0024] The technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0025] Figure 1 This illustrates the structural concept of a switch detection device provided by an embodiment of the present invention. For example... Figure 1 As shown, the switch detection device provided in this embodiment of the invention includes a detection control module and a power supply module.

[0026] In this embodiment of the invention, the detection control module is configured to detect the functional state of the target switch using a target current, wherein the target current is a current that conforms to the setting of the target switch.

[0027] In this embodiment of the invention, the target switch can be any proximity switch within the continuous rolling mill. The functional state of the target switch is whether it can normally detect whether there are obstructions around it. For example, when an object passes by (or obstructs) the target switch, it triggers the target switch to send an action signal, indicating that an object is present in front of the target switch. The target switch can operate under a set target current, which can be 220V AC, 22V AC, or DC, etc. The specific magnitude of the target current and other electrical attribute parameters are determined by the target switch; for details, please refer to the technical documentation of the target switch.

[0028] In this embodiment of the invention, the detection control module can input a target current to the target switch to provide power to the target switch. When the target switch generates an action signal (i.e., when it senses the presence of an object or obstruction in the vicinity), different states are displayed according to the action signal of the target switch, thereby realizing the detection of the functional state of the target switch.

[0029] In this embodiment of the invention, the detection control module can be electrically connected to the target switch to input a target current to the target switch. For example, the current output terminal of the detection control module can be connected to the input terminal of the target switch via a current transmission wire, or other devices with current transmission capabilities, such as a test probe (the probe tip is inserted into the input terminal of the target switch, thereby facilitating the movement and testing of multiple target switches).

[0030] In this embodiment of the invention, the continuous rolling mill may include multiple target switches. To facilitate unified testing and maintenance of the functional states of these multiple target switches, a terminal box may be installed outside the continuous rolling mill. The terminal box contains multiple pairs of terminals, each corresponding to one of the multiple target switches. The input and output ports of the target switches can be connected one-to-one to the corresponding terminals in the terminal box. That is, when the detection and control module is connected to the terminals in the terminal box, the target current is emitted through the detection and control module, passes through the input port of the target switch, reaches the corresponding terminal in the terminal box, and then reaches the detection and control module via the corresponding terminal of the target switch's output port, thereby achieving a current closed loop.

[0031] In this embodiment of the invention, the detection and control module includes a current control unit, a switch type control joystick, and a status indicator light.

[0032] In this embodiment of the invention, the current control unit is electrically connected to the power supply module and is configured to output a target current based on the connection status of the current terminals before using the target current to detect the functional status of the target switch.

[0033] In this embodiment of the invention, the current control unit may include multiple pairs of current terminals, all of which are electrically connected to the power supply module. The current terminals may be in the form of sockets, with different types and sizes of target currents corresponding to different pairs of current terminals. Each pair of circuit terminals can output a corresponding target current. Before the detection control module uses the target current to detect the functional state of the target switch, it can output the target current based on the connection of the current terminals. For example, when the target current is 220V AC, the target switch can be electrically connected to the current terminal outputting 220V AC, thereby providing the target current to the target switch. When the target current is 24V AC, the target switch can be electrically connected to the current terminal outputting 24V AC.

[0034] In this embodiment of the invention, the detection and control module further includes a switch type control joystick, configured to adjust the display state of the switch type control joystick according to the transistor type of the target switch before detecting the functional state of the target switch using the target current.

[0035] In this embodiment of the invention, the switch type control joystick can be a record capable of changing the switch type of the target switch within the detection control module. Before the detection control module uses the target current to detect the functional state of the target switch, the display state of the switch type control joystick is adjusted according to the switch type of the target switch. The transistor type of the target switch can include both NPN and PNP types. When the transistor type of the target switch is NPN, the switch type control joystick can point to the NPN type; when the transistor type of the target switch is PNP, the switch type control joystick can point to the PNP type.

[0036] In this embodiment of the invention, the detection control module also includes a status indicator light, configured to display the output status corresponding to the switch type according to the switch type of the target switch during the process of detecting the functional status of the target switch using the target current.

[0037] In this embodiment of the invention, the status indicator light can be an LED bulb. During the process of detecting the functional status of the target switch using the target current, based on the switch type of the target switch, after receiving the action signal of the target switch, the output status corresponding to the switch type can be displayed by lighting up the light. The switch type can include normally open and normally closed types. When the target switch is normally open, it indicates that the target switch is in an open state, and the normal state of the target switch is that there is no obstruction in front of the target switch. When the target switch is normally closed, it indicates that the target switch is in a closed state, and the normal state of the target switch is that there is an obstruction in front of the target switch.

[0038] Specifically, if the target switch is a normally open type and there are no obstructions in front of it, the target switch is in a normal state, does not emit an action signal, and the status indicator light is off, indicating that the target switch is functioning well. If the target switch is a normally open type and there are obstructions in front of it, the target switch is in an abnormal state, emits an action signal, and the status indicator light is on, indicating that the target switch is functioning well.

[0039] If the target switch is normally closed and there is no obstruction in front of it, the target switch will be in an abnormal state, sending an action signal and the status indicator light will be on, indicating that the target switch is functioning well. If the target switch is normally closed and there is an obstruction in front of it, the target switch will be in a normal state, not sending an action signal and the status indicator light will be off, indicating that the target switch is functioning well.

[0040] In this embodiment of the invention, if other abnormal situations occur, it indicates that the target switch is in poor functional condition and requires manual troubleshooting. For example, if the target switch is a normally closed type and there is an obstruction in front of it, the status indicator light will still be off. In this case, on-site maintenance personnel will troubleshoot based on the abnormal display of the status indicator light.

[0041] In this embodiment of the invention, when inspecting and testing the functional status of the target switch, the area in front of the target switch can be blocked manually or by other automated equipment on site.

[0042] In embodiments of the present invention, such as Figure 1 The switch detection device shown includes not only the detection and control module described above, but also a power supply module electrically connected to the detection and control module. The power supply module is configured to provide a target current to the detection and control module.

[0043] In this embodiment of the invention, the power supply module includes: a battery pack for providing stable direct current; and a power converter electrically connected to the battery pack and the detection and control module for converting the stable direct current provided by the battery pack into a target current used by the detection and control module when detecting the functional state of the target switch.

[0044] In this embodiment of the invention, the battery pack may include batteries capable of providing stable direct current. A power converter is electrically connected to the battery pack and also electrically connected to the detection and control module. The power converter can convert the stable direct current provided by the battery pack into corresponding currents at multiple current terminals on the detection and control module, thereby enabling the detection and control module to provide a corresponding target current to the target switch when detecting the functional state of the target switch.

[0045] In this embodiment of the invention, to facilitate operator monitoring of the status of the switch detection device, the power converter also includes a display screen. The display screen can be a high-precision four-digit power display screen (including two decimal places) to display the power status in real time, facilitating operator monitoring. Furthermore, the power converter may also include a power switch knob, which is used to operate the power converter and discharge to the detection and control module.

[0046] In this embodiment of the invention, to facilitate portability and on-site operation of the switch detection device, the switch detection device also includes a housing disposed outside the device, configured to enclose the detection control module and the power supply module. The housing may adopt a robust and durable cuboid design, and may also be equipped with a lid on top. The detection control module and power supply module are arranged internally using precision brackets and fasteners to ensure stable installation of each component and improve overall structural stability.

[0047] In this embodiment of the invention, to effectively resist harsh environmental corrosion and extend the service life of the switch detection device, the switch detection device further includes a corrosion-resistant coating disposed on the exterior of the housing to protect the housing.

[0048] Figure 2 This illustrates another structural concept of a switch detection device provided by an embodiment of the present invention. For example... Figure 2 As shown, the switch detection device provided in this embodiment of the invention integrates a housing, a battery pack, a power converter, and a detection and control module. Specifically, Enclosure: Featuring a robust and durable rectangular design with a top cover for easy carrying and on-site operation. The enclosure surface is coated with a high-performance anti-corrosion coating, effectively resisting harsh environmental impacts and extending its service life. Internally, a precision-designed bracket and fastener layout ensures secure installation of all components, enhancing overall structural stability.

[0049] Battery Pack: Contains multiple built-in rechargeable high-performance lithium batteries, serving as the power source for the entire switch detection device. It provides a stable 12V DC output, ensuring continuous and reliable power support for detection operations. It also supports 220V fast charging, ensuring continuous detection operations for up to 9 hours, meeting the needs of extended testing periods. The charging power cord is cleverly concealed within the enclosure, avoiding the risk of accidental electric shock.

[0050] Power Converter: Employing advanced conversion technology, this device safely and efficiently converts the 12V DC power supplied by the battery pack into the 220V AC power (or 24V DC power) required by the detection and control module. The power converter is equipped with a convenient power switch and a high-precision four-digit power display (including two decimal places) that shows the power status in real time for easy monitoring by operators. Simultaneously, the power converter integrates multiple protection mechanisms, including overvoltage, undervoltage, and overcurrent protection, to ensure a safe and reliable power supply.

[0051] Detection and control module: As the core brain of the switch detection device, it has powerful detection capabilities. Figure 3 This illustrates the structural concept of a detection control module provided by an embodiment of the present invention. For example... Figure 3 As shown, the detection control module includes an operation display panel, which at least includes a switch type control joystick, a current control unit, and status indicator lights. Operators can easily view equipment status, select control functions, and read detection results through the operation display panel. All displays and indications comply with safety regulations, ensuring accurate information transmission and immediate operational response.

[0052] The detection and control module supports both NPN and PNP proximity switch detection, and is compatible with 220V and 24V voltage standards to meet diverse detection needs. Before testing, the corresponding terminal can be selected in the current control unit according to the target switch's set current (target current). Then, the switch type control lever is adjusted to the corresponding position according to the transistor type of the target switch. Finally, the power supply indicator lever is turned on (changed to the ON position) to allow the power converter to supply power to the target switch, thus achieving fast and accurate switch status detection.

[0053] Figure 4 This illustrates the structural concept of a switch detection system provided by an embodiment of the present invention. For example... Figure 4 As shown, the switch detection system provided in this embodiment of the invention includes: Continuous rolling mill including multiple target switches; A switch detection device is connected to the continuous rolling mill, and the device is as follows: Figure 1 or Figure 2 The switch detection device shown.

[0054] The switch detection system provided in this embodiment of the invention is based on the same technical concept as the switch detection device described above. The specific concept can be referred to the description of the switch detection device above, and will not be repeated here.

[0055] Figure 5 This illustration shows a scenario application of a switch detection system provided by an embodiment of the present invention. It should be understood that... Figure 5 This is an example, not a limitation. Figure 5 As shown, the switch detection system provided in this embodiment of the invention can generally be used through the following steps: S1. Preparation: After confirming that the rolling mill sensors are powered off or the energy source is isolated, and the continuous rolling mill is in a power-off state, the switch detection device sequentially uses a target current to detect the functional status of the target switch. The target current is the current set by the target switch. To ensure safe operation, two personnel of the same skill level are prepared, one responsible for shielding and the other for detection. Figure 5 The personnel shown are those who are being obscured and those who are being tested.

[0056] S2. On-site deployment: The test personnel will deploy the switch detection device (such as the one provided in this embodiment of the invention) to the site. Figure 2 Place the device (as shown) stably in the nearest terminal box (which includes the connection terminals of all target switches on the mill). Open the cover of the switch detection device and correctly connect the test leads to the corresponding terminals in the terminal box (i.e., the target switches). Turn on the power switch in the power converter and confirm that the power is sufficient (greater than 6V).

[0057] S3. Testing Operation: Adjust the testing control module to the appropriate setting based on the target switch's switch type (normally open or normally closed) and transistor type. Insert the test probes into the target current and feedback signal terminals corresponding to the target switch in the current control unit. Observe the status indicator lights on the operation display panel to determine if the switch is working properly.

[0058] When the target switch is a normally open switch: the status indicator light should be off when there is no obstruction; the indicator light should be on after obstruction, indicating that the normally open switch is functioning normally.

[0059] When the target switch is a normally closed switch: the status indicator light should be on when there is no obstruction; the indicator light should be off when obstructed, indicating that the normally closed switch is functioning normally.

[0060] If the status indicator lights do not follow the above pattern, it indicates that the target switch may be damaged, and a warning signal should be issued for further manual inspection and handling.

[0061] S4. Recording and Moving: After completing the test of one target switch, record the test result and remove the test probe from the terminal box. Insert the test probe into the corresponding terminal of the next target switch and repeat the above test steps.

[0062] S5. Multi-position detection: When conducting detection at different rolling mills or locations, simply move the switch detection device and personnel to the nearest location and repeat the above detection steps.

[0063] The switch detection device provided in this invention adopts a compact, integrated housing structure, integrating a battery pack, power converter, detection control module, and operation display panel, achieving portability and high integration of the detection equipment. Furthermore, the switch detection device provided in this invention employs non-electrical measurement technology, enabling accurate detection of switch status without energizing or isolating the rolling mill sensors. This overcomes the cumbersome limitations of traditional energy isolation and restoration procedures during the marking process, simplifying and optimizing operation. The elimination of complex energy isolation steps significantly saves operation time and improves work efficiency. It represents a revolutionary shift in the marking process from energizing all sensors within the rolling mill at 220V to temporarily energizing a single, independent cable. This innovative design significantly enhances operational safety, effectively avoiding potential safety hazards caused by live-line work. Simultaneously, it ensures that normal construction work at other positions is not affected, guaranteeing overall work efficiency.

[0064] By applying the switch detection device provided in this invention, a single operator can complete the local detection task of the internal switches of the rolling mill when testing the proximity switches, eliminating the need for multiple personnel. This effectively reduces the number of personnel involved in the detection work and the total number of workers. This improvement not only reduces labor costs but also increases the efficiency of labor utilization.

[0065] The above description does not provide detailed technical specifications regarding the structure of each layer. However, those skilled in the art should understand that layers and regions of desired shapes can be formed using various technical means. Furthermore, to form the same structure, those skilled in the art can also design methods that are not entirely identical to those described above. Additionally, although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be advantageously combined.

[0066] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0067] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A switch detection device, characterized in that, The device includes: The detection control module is configured to detect the functional status of the target switch using a target current, wherein the target current is a current that conforms to the setting of the target switch; The power supply module is electrically connected to the detection and control module and is configured to provide the target current to the detection and control module.

2. The switch detection device according to claim 1, characterized in that, The detection control module includes: A current control unit, electrically connected to the power supply module, is configured to output a target current based on the connection status of the current terminals before detecting the functional status of the target switch using the target current; A switch type control joystick is configured to adjust the indication state of the switch type control joystick according to the transistor type of the target switch before detecting the functional state of the target switch using the target current.

3. The switch detection device according to claim 2, characterized in that, The detection control module further includes: The status indicator is configured to display the output status corresponding to the switch type during the process of detecting the functional status of the target switch using the target current, based on the switch type of the target switch.

4. The switch detection device according to claim 3, characterized in that, The status indicator light is used for: If the target switch is normally open and there are no obstructions in front of the target switch, and the light is off, the switch type includes normally open. If the target switch is normally open and there is an obstruction in front of the target switch, the light will be on.

5. The switch detection device according to claim 3, characterized in that, The status indicator light is used for: If the target switch is normally closed and is in a lit state when there is no obstruction in front of it, the switch type also includes normally closed. If the target switch is normally closed and there is an obstruction in front of the target switch, the light is off.

6. The switch detection device according to claim 1, characterized in that, The power supply module includes: Battery packs are used to provide stable direct current. A power converter, electrically connected to the battery pack and the detection and control module, is used to convert the stable DC power provided by the battery pack into the target current used by the detection and control module when detecting the functional state of the target switch.

7. The switch detection device according to claim 1, characterized in that, The switch detection device further includes: The enclosure is located outside the switch detection device and is configured to enclose the detection control module and the power supply module.

8. The switch detection device according to claim 7, characterized in that, The switch detection device further includes: A corrosion-resistant coating is applied to the exterior of the enclosure to protect it.

9. A switch detection system, characterized in that, The switch detection system includes: Continuous rolling mill including multiple target switches; A switch detection device is connected to the continuous rolling mill, and the device is the switch detection device as described in any one of claims 1-8.

10. The switch detection system according to claim 9, characterized in that, When the continuous rolling mill is in a power-off state, the switch detection device sequentially uses a target current to detect the functional status of the target switch, and the target current is a current that conforms to the setting of the target switch.

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