A new RFID radio frequency technology identification switch sensor

Abstract

The application relates to the technical field of mechanical safety, in particular to a novel RFID (Radio Frequency Identification) switch sensor which comprises a sensing host, a key assembly, an unlocking module, a state display module, a signal detection module and a signal processing unit. The sensing host is provided with a clamping groove, the key assembly is interlocked with the host through a locking mechanism for protection, the unlocking module realizes the opening and closing of a safety door or a fence through a switching block and a limiting device, the state display module reflects the working state through color change of a light-emitting element, and the signal detection module realizes radio frequency signal identification and unlocking through an antenna coil. Two chips are arranged in the signal processing unit, signals are analyzed, and instructions are generated. The application can realize non-contact identity authentication and internal double-channel loop, improve the safety of fence mechanical safety, and is suitable for high-safety scenes.

Description

Technical Field

[0001] This application relates to the field of mechanical safety technology, and more specifically, to a novel RFID radio frequency identification switch sensor. Background Technology

[0002] As a crucial reference standard in the field of mechanical safety, updates to ISO 14119 directly impact the design, manufacture, and use of industrial equipment. If dry-joint interlocking devices are used in series in the design of machine interlocking switches, it's important to note that the PL (Power Level) rating achieved under the new standard may be reduced due to fault masking. Traditional switch sensors are mostly photoelectric, magnetic, or mechanical locking types, which are insufficient for effectively protecting equipment, property, and personnel safety in high-risk industrial environments. Traditional switch sensors often rely on infrared, photoelectric, or magnetoresistive principles for physical quantity sensing. While these technologies can achieve basic triggering functions, they exhibit limitations in high-security scenarios, such as difficulty supporting contactless authentication and internal dual-channel loop implementation.

[0003] Furthermore, existing technologies generally lack radio frequency identification (RFID) and information encryption capabilities, resulting in deficiencies in anti-counterfeiting performance and intelligent management, and failing to fully meet the stringent requirements for identification accuracy and traceability. This is especially true in application scenarios requiring remote management and high security levels, where traditional technologies struggle to adequately meet development needs.

[0004] Therefore, this utility model proposes a novel switch sensor based on RFID radio frequency technology, aiming to improve the security and intelligence level of the system by integrating sensing, identification, communication and control functions. Utility Model Content

[0005] This invention provides a novel RFID radio frequency identification switch sensor to address the limitations of traditional switch sensors in supporting contactless authentication and internal dual-channel loop implementation in high-security scenarios. Existing technologies suffer from deficiencies in anti-counterfeiting performance, identification accuracy, and remote management due to a lack of RFID capabilities, information encryption mechanisms, and intelligent management methods. Therefore, this invention proposes a novel switch sensor integrating sensing, identification, communication, and control. By introducing RFID radio frequency technology and related module design, it achieves efficient identity verification and security control.

[0006] According to one aspect of this utility model, a novel RFID radio frequency identification switch sensor is provided, comprising:

[0007] The sensor host has a through slot on one side;

[0008] A key assembly is detachably connected to the sensor host via a locking mechanism, and at least a portion of the key assembly extends into the snap-in slot;

[0009] An unlocking module is provided on the front and / or back of the sensor host and is used to control the locking and unlocking states of the locking mechanism. The unlocking module includes a switching block rotatably connected to the sensor host and a limiting device provided inside the sensor host.

[0010] A status display module, installed on the sensor host, is used to indicate the system's operating status;

[0011] A signal detection module, located on the top of the sensor host, is used to transmit and receive radio frequency signals;

[0012] The signal processing unit is located inside the sensor host and is electrically connected to the status display module and the signal detection module. It is used to parse the received signals and generate control commands.

[0013] In some alternative embodiments, the key assembly includes a locking lever, one end of which is fixedly connected to one side of the key assembly, and the other end of which passes through the locking groove and engages with the locking mechanism, wherein the depth of the locking groove is greater than the length of the locking lever.

[0014] In some optional embodiments, the locking mechanism is a retractable latch disposed inside the sensor host and located on the side wall of the latching slot. The retractable latch is mechanically linked to the limiting device, and a groove is provided on the side wall of the locking rod to cooperate with the retractable latch.

[0015] In some optional embodiments, the bottom of the switching block is provided with a driving part, and the unlocking module further includes an unlocking identifier, which includes a normal state and an unlocked state.

[0016] In some optional embodiments, the key assembly has a receiving cavity on its outer side, and a protective cover is provided inside the receiving cavity. The surface of the protective cover has multiple fixing holes, and each fixing hole has a fastening screw. One end of the fastening screw passes through the fixing hole and is threaded into the inside of the key assembly.

[0017] In some optional embodiments, the status display module includes a light-emitting element and a control circuit. The light-emitting element is fixed to the outer surface of the sensor host and electrically connected to the control circuit. The control circuit uses pulse width modulation technology to adjust the brightness and color of the light-emitting element.

[0018] In some optional embodiments, the signal detection module includes an antenna coil, a transceiver circuit, and a large indicator light. The antenna coil is disposed on the top of the sensor host and is used to transmit radio frequency signals and receive response signals from external RFID cards. The transceiver circuit is electrically connected to the antenna coil and the signal processing unit. The large indicator light is disposed on the top of the sensor host.

[0019] In some optional embodiments, the signal processing unit includes a signal amplification unit, a logic control unit, and a self-test unit. The input terminal of the signal amplification unit is connected to the signal detection module, and the output terminal is connected to the logic control unit. The logic control unit interacts with external devices through a serial communication interface. The self-test unit consists of a timer and a comparator. The timer periodically sends test signals to the signal processing unit, and the comparator receives the test signals and compares them with the feedback signal.

[0020] In some optional embodiments, a marking area is provided on the outer side of the sensor host. The marking area is laser-engraved to form model information and production batch information. The surface of the marking area is coated with a transparent protective coating to prevent wear and blurring due to long-term use.

[0021] In summary, the novel RFID radio frequency identification switch sensor provided by this utility model has at least the following technical effects:

[0022] 1. Through the precise cooperation between the sensor host and the key assembly, efficient operation with mechanical safety is achieved. The depth matching design of the locking groove and the locking lever avoids external interference and enhances the overall structural stability.

[0023] 2. The design of the unlocking module balances ease of operation with system security. The switching block cooperates with the limiting device through the bottom drive unit. When the switching block switches from the normal state to the unlocked state, the axial restriction on the key assembly is released, allowing the key assembly to be disassembled.

[0024] 3. The status display module visually reflects the system's operating status through color changes of the light-emitting element. The control circuit uses pulse width modulation technology to adjust the brightness and color of the light-emitting element, allowing users to quickly determine the system's operating status by observing color changes.

[0025] Through the above technical solution, this utility model solves the problem that traditional switch sensors are difficult to support non-contact authentication and internal dual-channel circuit in high-security scenarios, and provides a more efficient and reliable mechanical safety solution. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application.

[0027] Figure 1 This is a schematic diagram of a first three-dimensional structure according to an embodiment of the present disclosure;

[0028] Figure 2 This is a schematic diagram of a second three-dimensional structure according to an embodiment of the present disclosure;

[0029] Figure 3 This is a cross-sectional perspective view of an embodiment of the present disclosure;

[0030] Figure 4 This is a cross-sectional, split, three-dimensional structural diagram of an embodiment of this disclosure;

[0031] Icons: 1. Sensor host; 2. Key assembly; 3. Snap-in slot; 4. Locking lever; 5. Groove; 6. Retractable latch; 7. Switching block; 8. Drive unit; 9. Limiting device; 10. Status display module; 11. Signal detection module; 12. Antenna coil; 13. Large indicator light; 14. Signal processing unit. Detailed Implementation

[0032] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0033] This invention provides a novel RFID radio frequency identification switch sensor. The specific embodiments of this invention will be described in detail below with reference to the accompanying drawings.

[0034] like Figure 1 and Figure 2As shown, the sensor host 1 has a rectangular parallelepiped structure with a through-hole 3 on one side for detachable connection with the key assembly 2, achieving interlocking protection. The inner wall of the 3 is precision-machined to ensure a tight fit with the outer wall of the key assembly 2. The key assembly 2 includes a locking rod 4, one end of which is fixedly connected to one side of the key assembly 2, and the other end passes through the 3, achieving a reliable connection with the sensor host 1 through a locking mechanism. The locking mechanism is a retractable latch 6 located inside the sensor host 1 and on the side wall of the 3. The retractable latch 6 is mechanically linked to the limiting device 9, and a groove 5 is provided on the side wall of the locking rod 4 to cooperate with the retractable latch 6. When the locking rod 4 is fully inserted into the 3, the retractable latch 6 automatically pops out and engages in the groove 5, thereby achieving axial locking between the key assembly 2 and the sensor host 1. The depth of the slot 3 is designed to be greater than the length of the locking lever 4. When the key assembly 2 is fully inserted, the end face of the locking lever 4 is flush with the outer surface of the sensor host 1 or located in the slot 3, which avoids external interference and enhances the stability of the overall structure.

[0035] The key assembly 2 has a receiving cavity on its outer side, and a protective cover is installed inside the receiving cavity. The surface of the protective cover has multiple fixing holes, each containing a fastening screw. One end of the fastening screw passes through the fixing hole and connects to the internal thread of the key assembly 2, thereby securing the protective cover. This design facilitates removal and replacement during maintenance.

[0036] The unlocking module is located on the front and / or back of the sensor host 1, such as... Figure 3 and Figure 4 As shown, the unlocking module includes a switching block 7 and a limiting device 9 located inside the sensor host 1. The switching block 7 is rotatably connected to the sensor host 1 via a rotating shaft. It has a drive unit 8 at its bottom and an operating groove on its surface for easy manual operation or operation with the aid of tools. The unlocking module also includes an unlocking indicator, which includes a normal state and an unlocked state. The normal state indicates that locking can be performed via electromagnetic locking control input, while the unlocked state indicates that locking is impossible regardless of the locking control input state; even if it is in a lockable state, no locking action is performed. When the switching block 7 switches from the normal state to the unlocked state, the drive unit 8 pushes the limiting device 9 out of the groove 5 of the locking rod 4, releasing the axial restriction on the locking rod 4 and allowing the key assembly 2 to be disassembled. The position change of the switching block 7 directly affects the action of the limiting device 9 through mechanical transmission, thereby achieving the unlocking function.

[0037] The status display module 10 is installed on the sensor host 1, such as Figure 2As shown, the status display module 10 includes a light-emitting element and a control circuit. The light-emitting element is fixed to the outer surface of the sensor host 1 and electrically connected to the control circuit. The control circuit uses pulse width modulation technology to adjust the brightness and color of the light-emitting element, and the color change of the light-emitting element is used to indicate the working status of the sensor host 1. The status display module 10 is used to indicate the final status and authorization result of the entire device. For example, under normal working conditions, the light-emitting element displays a green light; when a fault or abnormality occurs, the light-emitting element displays a red light. In this way, the user can quickly determine the working status of the system by observing the color change of the light-emitting element.

[0038] The signal detection module 11 is located on the top of the sensor host 1, such as... Figure 2 , Figure 3 and Figure 4 As shown, the signal detection module 11 includes an antenna coil 12, a transceiver circuit, and a large indicator light 13. The antenna coil 12 is arranged around the top of the sensor host 1 and is used to transmit radio frequency signals and receive response signals from RFID cards. The transceiver circuit is electrically connected to the antenna coil 12 and the signal processing unit 14, and is responsible for signal modulation and demodulation. The large indicator light 13 is located on the top of the sensor host 1 and is used to indicate the RFID card reading interaction process. For example, in standby mode, the large indicator light 13 is constantly lit or off; when a card is detected, the large indicator light 13 flashes rapidly to indicate that reading is in progress; after successful reading, the large indicator light 13 is constantly lit in blue.

[0039] The signal processing unit 14 is disposed inside the sensor host 1 and is electrically connected to the status display module 10 and the signal detection module 11, such as Figure 4 As shown. The signal processing unit 14 includes a signal amplification unit, a logic control unit, and a self-test unit. The input of the signal amplification unit is connected to the signal detection module 11 to enhance the signal strength acquired by the signal detection module 11. The output of the signal amplification unit is connected to the logic control unit, which parses the received signal and generates corresponding control commands. The logic control unit interacts with external devices via a serial communication interface to achieve remote signal transmission and processing. The self-test unit consists of a timer and a comparator. The timer periodically sends test signals to the signal processing unit 14, and the comparator receives the test signals and compares them with the feedback signal. If the difference exceeds a preset threshold, the self-test unit generates a fault signal and displays a red light through the light-emitting element of the status display module 10 to prompt the user to check. The signal processing unit 14 contains two chips. Every 20ms, the chips detect the circuit, providing external device circuit diagnostic capabilities to ensure that the signals given in the locked, unlocked, or open states are safe and reliable.

[0040] In addition, a marking area is provided on the outside of the sensor host 1. The marking area is formed with model information and production batch information using laser engraving technology. A transparent protective coating is applied to the surface of the marking area to prevent it from becoming blurred due to wear and tear over long-term use.

[0041] In practical applications, when the user inserts the key assembly 2 into the slot 3 of the sensor host 1, the locking lever 4 is fully embedded in the slot 3. The groove 6 of the locking lever 4 cooperates with the retractable latch 6 to achieve axial locking. During insertion, the signal detection module 11 automatically detects the presence of the key assembly 2 and displays the signal acquisition status through the large indicator light 13. If the key assembly 2 is not fully inserted or there is an abnormality, the large indicator light 13 will flash to prompt the user to repeat the operation.

[0042] When a user approaches the signal detection module 11 with an RFID card, the built-in antenna coil 12 transmits a radio frequency signal and receives the card's response signal. This signal is modulated and demodulated by the transceiver circuit and then transmitted to the signal processing unit 14. The signal amplification unit in the signal processing unit 14 enhances the received signal to improve the accuracy of signal analysis. The amplified signal is then sent to the logic control unit, which analyzes the signal according to a preset authentication algorithm. If the analysis result meets the preset conditions, the logic control unit generates an unlock command and sends it to an external device via a serial communication interface. Simultaneously, the light-emitting element of the status display module 10 displays a green light, indicating that the lock is released and the sensor host 1 is activated, allowing the user to freely enter and exit. If the analysis result does not meet the preset conditions, the logic control unit generates an error signal, and the light-emitting element of the status display module 10 displays a red light, indicating that the lock is not released and the user needs to try again.

[0043] When the sensor host 1 malfunctions or malfunctions, it is necessary to switch from electromagnetic locking to manual unlocking. This requires switching the sensor host 1 from its normal state to the unlocked state, necessitating the user to use additional tools. During the unlocking process, the user manually operates the unlocking module's switching block 7. The switching block 7, through its bottom drive unit 8, cooperates with the limiting device 9. When the switching block 7 switches from the normal state to the unlocked state, the drive unit 8 disengages from the limiting device 9, thereby releasing the restriction on the key assembly 2. At this time, the electromagnetic locking is disabled, and the user can remove the key assembly 2 from the sensor host 1 to complete the manual unlocking operation. When the unlocking module is in the unlocked state, the door will not lock even when closed. During this process, the light-emitting element of the status display module 10 displays the system's operating status in real time, allowing the user to understand the device's working status promptly. The operating slot design of the switching block 7 facilitates manual operation or operation with the aid of tools, ensuring the convenience and reliability of the unlocking process.

[0044] During system operation, the self-test unit of the signal processing unit 14 periodically sends test signals to the system. The comparator receives the test signals and compares them with the feedback signal. If the difference between the test signal and the feedback signal exceeds a preset threshold, the self-test unit generates a fault signal and displays a red light through the status display module 10, prompting the user to check. This self-test mechanism not only improves the stability of the system but also enables the timely detection of potential faults, reducing the possibility of system failure.

[0045] The specific embodiments of this utility model have been described in detail above with reference to the accompanying drawings. Those skilled in the art can implement the technical solution of this utility model based on the above description.

[0046] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principles of this utility model are further explained below in conjunction with specific application scenarios.

[0047] In practical applications, this switch sensor uses electromagnetic locking for its locking function. When a user needs to pass through a safety fence to protect mechanical equipment, they first insert the key assembly 2 into the locking slot 3 of the sensor host 1. The locking slot 3 is precision-machined, and its depth precisely matches the length of the locking rod 4, ensuring that the locking rod 4 is fully embedded with its rear end face flush with the outer surface of the sensor host 1 or located inside the locking slot 3. When the locking rod 4 is fully inserted, the retractable locking pin 6 automatically pops out and locks into the groove 5, thereby achieving a reliable connection between the key assembly 2 and the sensor host 1. During this process, the signal detection module 11 monitors the presence status of the key assembly 2 in real time and displays the signal acquisition status through a large indicator light 13. If the key assembly 2 is not fully inserted or there is an abnormality, such as an insertion angle deviation or the locking rod 4 failing to correctly enter the locking slot 3, the large indicator light 13 will flash to prompt the user to reoperate, thus ensuring the reliability of the connection.

[0048] When a user approaches the signal detection module 11 with an RFID card, the antenna coil 12 emits a radio frequency signal and interacts with the card. The card responds and returns a signal, which is modulated and demodulated by the transceiver circuit and transmitted to the signal processing unit 14. The signal amplification unit enhances the received signal to improve the accuracy of signal analysis. The amplified signal is then sent to the logic control unit, which analyzes the signal according to a preset authentication algorithm. If the analysis result meets the preset conditions, the logic control unit generates an unlock command and sends it to an external device via a serial communication interface, thereby enabling remote management and data interaction. Simultaneously, the status display module 10 displays a green light, indicating that the lock is released and the user can freely enter and exit the security fence. If the analysis result does not meet the preset conditions, such as invalid card information or poor signal quality, the logic control unit generates an error signal, and the status display module 10 displays a red light, indicating that the lock is not released and the user needs to try again.

[0049] When the sensor host 1 malfunctions or malfunctions, it is necessary to switch from electromagnetic locking to manual unlocking. During the unlocking process, the user must manually operate the switching block 7 of the unlocking module. The switching block 7 cooperates with the limiting device 9 through the driving part 8 at the bottom. When the switching block 7 switches from the normal state to the unlocked state, the driving part 8 disengages from the limiting device 9, thereby releasing the axial restriction on the locking rod 4. At this time, the electromagnetic locking fails, and the unlocking module is in the unlocked state, so it will not lock even if closed. The user can remove the key assembly 2 from the sensor host 1 to complete the manual unlocking operation. The operating slot design of the switching block 7 facilitates manual operation or operation with the aid of tools, ensuring the convenience and reliability of the unlocking process.

[0050] During system operation, the self-test unit of the signal processing unit 14 periodically sends test signals to the system. The comparator receives the test signals and compares them with the feedback signals. If the difference between the test signals and the feedback signals exceeds a preset threshold, the self-test unit generates a fault signal and displays a red light through the light-emitting element of the status display module 10, prompting the user to check. This self-test mechanism not only improves the stability of the system but also enables timely detection of potential faults, reducing the possibility of system failure. For example, when the signal strength of the antenna coil 12 of the signal detection module 11 decreases due to external interference, the self-test unit can quickly detect the abnormality and issue an alarm, thereby ensuring the normal operation of the system.

[0051] The outer side of the sensor unit 1 has a marking area, where model information and production batch information are laser-engraved. The marking area is coated with a transparent protective coating to prevent wear and tear over time. The outer side of the key assembly 2 has a receiving cavity, inside which is a protective cover. The protective cover has multiple fixing holes, each containing a fastening screw. One end of the screw passes through the hole and connects to the internal thread of the key assembly 2, thus securing the cover. This design facilitates removal and replacement during maintenance. For example, when the locking lever 4 of the key assembly 2 wears down due to prolonged use, the user can quickly replace the component by removing the protective cover, thereby extending the system's lifespan.

[0052] In summary, this utility model achieves efficient identity verification and security control functions through the above steps. The precise design and collaborative operation of each component ensure the stability and reliability of the system, while simultaneously meeting the requirements of contactless identity authentication and internal dual-channel loop implementation in high-security scenarios. Those skilled in the art can implement this technical solution based on the above description, ensuring its practicality and operability.

[0053] Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0054] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0056] Although preferred embodiments of this application 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 the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0057] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A novel RFID radio frequency identification switch sensor, characterized in that, include: The sensor host (1) has a through slot (3) on one side; The key assembly (2) is detachably connected to the sensor host (1) via a locking mechanism, and at least a portion of the key assembly (2) extends into the snap-in slot (3); An unlocking module is provided on the front and / or back of the sensor host (1) for controlling the locking and unlocking states of the locking mechanism. The unlocking module includes a switching block (7) rotatably connected to the sensor host (1) and a limiting device (9) provided inside the sensor host (1). A status display module (10) is installed on the sensor host (1) to indicate the system working status; A signal detection module (11) is disposed on the top of the sensor host (1) and is used to transmit and receive radio frequency signals; The signal processing unit (14) is located inside the sensor host (1) and is electrically connected to the status display module (10) and the signal detection module (11) for parsing the received signals and generating control commands.

2. The novel RFID radio frequency identification switch sensor according to claim 1, characterized in that, The key assembly (2) includes a locking rod (4), one end of which is fixedly connected to one side of the key assembly (2), and the other end is inserted into the locking groove (3) and connected to the locking mechanism. The depth of the locking groove (3) is greater than the length of the locking rod (4).

3. The novel RFID radio frequency identification switch sensor according to claim 2, characterized in that, The locking mechanism is a retractable latch (6) located inside the sensor host (1) and on the side wall of the latching slot (3). The retractable latch (6) is mechanically linked with the limiting device (9). A groove (5) is provided on the side wall of the locking rod (4) to cooperate with the retractable latch (6).

4. The novel RFID radio frequency identification switch sensor according to claim 1, characterized in that, The bottom of the switching block (7) is provided with a driving part (8), and the unlocking module also includes an unlocking identifier, which includes a normal state and an unlocked state.

5. The novel RFID radio frequency identification switch sensor according to claim 1, characterized in that, The key assembly (2) has a receiving cavity on its outer side, and a protective cover is provided inside the receiving cavity. The surface of the protective cover has multiple fixing holes, and each fixing hole is provided with a fastening screw. One end of the fastening screw passes through the fixing hole and is threadedly connected to the inside of the key assembly (2).

6. The novel RFID radio frequency identification switch sensor according to claim 1, characterized in that, The status display module (10) includes a light-emitting element and a control circuit. The light-emitting element is fixed on the outer surface of the sensor host (1) and electrically connected to the control circuit. The control circuit uses pulse width modulation technology to adjust the brightness and color of the light-emitting element.

7. The novel RFID radio frequency identification switch sensor according to claim 1, characterized in that, The signal detection module (11) includes an antenna coil (12), a transceiver circuit and a large indicator light (13). The antenna coil (12) is located on the top of the sensor host (1) and is used to transmit radio frequency signals and receive response signals from external RFID cards. The transceiver circuit is electrically connected to the antenna coil (12) and the signal processing unit (14). The large indicator light (13) is located on the top of the sensor host (1).

8. The novel RFID radio frequency identification switch sensor according to claim 1, characterized in that, The signal processing unit (14) includes a signal amplification unit, a logic control unit, and a self-test unit. The input end of the signal amplification unit is connected to the signal detection module (11), and the output end is connected to the logic control unit. The logic control unit interacts with external devices through a serial communication interface. The self-test unit consists of a timer and a comparator. The timer periodically sends test signals to the signal processing unit (14), and the comparator receives the test signals and compares them with the feedback signals.

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