Non-contact safety lock switching device

Abstract

The utility model discloses a non-contact safety lock switching device, and aims to solve the problems of low reliability, high maintenance cost and insufficient intelligence of the conventional protective door device. According to the system, non-contact data communication is adopted, communication between the reader and the electronic tag is controlled through the MCU, physical abrasion and faults are reduced, and the system is excellent in performance especially in a severe environment. Meanwhile, the electronic tag obtains energy by using radio frequency signal induction current, an external power supply is not needed for power supply, the system design is simplified, and the maintenance cost is reduced. In addition, due to the design of cooperative control of the two MCUs, the redundancy and safety of the system are improved, it is ensured that the system can still operate normally when one MCU breaks down, and the safety of personnel and equipment is guaranteed. A multi-signal-source comprehensive judgment mechanism enables the MCU to intelligently control the switch lock according to signals of the electronic tag, the photoelectric switch and the like, and misoperation is effectively prevented. The modular design is convenient for system maintenance, upgrade and expansion, and the flexibility and adaptability of the system are significantly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of protective door devices for personnel or machine safety, in particular to a non-contact safety lock switch device. Background Art

[0002] With the development of modern industry and automation, protective door devices involving personnel and machine safety have been widely used in various production environments. The main purpose of such devices is to provide timely warnings and physical isolation when personnel approach dangerous areas to prevent accidents. However, traditional protective door devices still have some technical problems and shortcomings in practical applications, such as:

[0003] 1. Traditional protective door devices usually rely on mechanical locks and wired control systems. These systems are prone to physical wear and failure in harsh environments. For example, dust, moisture and other environmental factors may cause mechanical parts to fail, and wired connections to have poor contact or damage. This not only increases maintenance costs and frequency, but may also cause safety system failures at critical moments, endangering the safety of personnel and equipment.

[0004] 2. Traditional systems usually require external power supply, which increases the complexity and maintenance cost of the system. In some special application environments, the introduction of external power supply may be limited, or the installation and maintenance of the system becomes extremely inconvenient due to the difficulty in laying power lines. In addition, the interruption of external power supply will directly affect the reliability and continuity of the system.

[0005] 3. Most existing protective door devices rely on a single signal source for control, such as a single mechanical switch or sensor signal. This design may lead to misoperation or missed operation in actual applications. For example, the protective door accidentally opens when no person approaches, or remains closed unnecessarily when a false signal is detected, which will affect production efficiency and safety.

[0006] Therefore, how to improve the reliability, safety and intelligence level of the protective door device has become a technical problem to be solved by the present utility model. Utility Model Content

[0007] The technical problem solved by the utility model is to provide a non-contact safety lock switch device in response to the defects existing in the above-mentioned prior art, so as to solve the problems of low reliability, high maintenance cost, reliance on a single signal source and need for external power supply of the protective door device proposed in the above-mentioned background technology in harsh environments.

[0008] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0009] A non-contact safety lock switch device, comprising an MCU, a reader, a transmitting antenna, an electronic tag, a photoelectric switch and a back-end circuit, wherein the MCU controls the reader to send a radio frequency signal through the transmitting antenna, and non-contact data communication is performed between the radio frequency signal and the electronic tag;

[0010] When the electronic tag is located in the working area of ​​the radio frequency signal, the electronic tag generates an induced current and is activated, and the electronic tag sends its own number information through a built-in radio frequency antenna;

[0011] The MCU controls the switch lock according to the status of the electronic tag, the photoelectric switch and other signals;

[0012] The MCU and another MCU jointly control the back-end circuit.

[0013] As a further solution of the utility model, the MCU is connected to the reader via a signal line, and the transmitting antenna is connected to the reader;

[0014] As a further solution of the utility model, the photoelectric switch is connected to the MCU via a signal line, and the electronic tag is connected to the MCU via wireless communication;

[0015] As a further solution of the utility model, the two MCUs are connected to the back-end circuit via signal lines respectively to form dual-path control.

[0016] As a further solution of the utility model, the photoelectric switch is arranged at the edge of the protective door to detect whether there is a person or an object near the protective door.

[0017] As a further solution of the utility model, the transmitting antenna is arranged on the inner side of the protective door frame, and the electronic tag is arranged on the outer surface of the protective door.

[0018] As a further solution of the utility model, the back-end circuit includes a power module and a control module, the power module provides power to the MCU and the reader, and the control module controls the opening and closing of the switch lock according to the instructions of the MCU.

[0019] As a further solution of the utility model, a dual-circuit protection circuit is also included, and the dual-circuit protection circuit includes a first protection circuit and a second protection circuit, the first protection circuit is connected to the first MCU, and the second protection circuit is connected to the second MCU.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. Improve system reliability and durability: The utility model adopts non-contact data communication and uses MCU to control the communication between the reader and the electronic tag. This non-contact method significantly reduces the wear and failure caused by physical contact, especially in harsh environments such as high temperature, high humidity or dust, and can work stably and reliably, greatly improving the reliability and durability of the system.

[0022] 2. Reduce maintenance costs and system complexity: Through the energy acquisition and activation mechanism, the electronic tag can generate an inductive current and obtain energy after entering the RF signal area, without the need for an external power supply. This not only simplifies the system design and reduces complexity, but also reduces dependence on external power supplies, reduces maintenance costs, and makes the system more flexible and easier to install and maintain.

[0023] 3. Enhanced system security and continuity: The utility model adopts dual MCU collaborative control. The two MCUs jointly control the back-end circuit. When one MCU fails, the other MCU can still work normally. This design improves the redundancy and security of the system, ensuring that the system can continue to operate at critical moments and protecting the safety of personnel and equipment.

[0024] 4. Improve the level of intelligence and safety: Through the comprehensive judgment mechanism of multiple signal sources, the MCU controls the switch lock after comprehensive judgment based on the status of the electronic tag, photoelectric switch and other signals. For example, by using the photoelectric switch to detect whether there is a person or object near the protective door, it can effectively prevent misoperation and ensure the reliability and safety of the protective door in actual application. This intelligent control greatly improves the security of the system and user experience.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 This is a schematic block diagram of the safety lock switch module of the utility model.

[0028] Figure 2 This is a schematic block diagram of the module distribution of the protective door position of the utility model.

[0029] Figure 3It is a detailed schematic block diagram of the back-end circuit of the utility model.

[0030] Figure 4 This is a contactless data communication circuit diagram of the utility model.

[0031] Figure 5 This is a power management circuit diagram of the utility model.

[0032] Figure 6 This is the circuit diagram of the buck converter of the utility model. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1 —6. In the embodiment of the utility model, a contactless safety lock switch device includes an MCU, a reader, a transmitting antenna, an electronic tag, a photoelectric switch and a back-end circuit. The MCU controls the reader to send a radio frequency signal through the transmitting antenna, and the radio frequency signal performs contactless data communication with the electronic tag; wherein the circuit diagram of the contactless data communication is shown in FIG. Figure 6 , is a circuit design based on the FM17622 chip. FM17622 is a commonly used RFID reader chip. The FM17622 chip (U5) is the core of the entire circuit, responsible for the transmission and reception of RF signals, as well as contactless data communication with electronic tags. The inductor (L3) and capacitors (C22, C23, C23A, C24, C24A, C25, C26, C27) form an antenna matching network to optimize the transmission and reception performance of RF signals. The power supply part (3.3V) provides the stable voltage required by the chip and its peripheral circuits. The filtering and decoupling capacitors (C6, C7, C8, C9, C10, C17, C18, C19, C20, C21) are used for power supply filtering and signal stability to ensure the normal operation of the circuit. The oscillator circuit (X1, C9, C10) provides the clock signal required for the chip to work.

[0035] When the electronic tag is located in the working area of ​​the radio frequency signal, the electronic tag generates an induced current and is activated, and the electronic tag sends its own number information through the built-in radio frequency antenna; the MCU controls the switch lock according to the status of the electronic tag, the photoelectric switch and other signals; the MCU and another MCU jointly control the back-end circuit. The MCU is connected to the reader through a signal line, and the transmitting antenna is connected to the reader; the photoelectric switch is connected to the MCU through a signal line, and the electronic tag is connected to the MCU through wireless communication; the two MCUs are respectively connected to the back-end circuit through signal lines to form a two-way control. The photoelectric switch is set at the edge of the protective door to detect whether there is a person or object near the protective door. The transmitting antenna is set on the inner side of the protective door frame, and the electronic tag is set on the outer surface of the protective door.

[0036] The back-end circuit includes a power module and a control module. The power module provides power to the MCU and the reader. The control module controls the opening and closing of the switch lock according to the instruction of the MCU. Figure 5 The power management circuit diagram shows a power management circuit for converting the input 10V voltage into 3.3V voltage. Among them, the AMS1117-3.3 voltage regulator chip (U2 and U3) is a two-way low-dropout linear regulator used to stably convert the input 10V voltage into 3.3V voltage, and output it as 3.3V1 and 3.3V2 respectively. The rectifier diodes (D3 and D4) are protection circuits to prevent voltage reverse. The filter capacitors (C13, C14, C15, C46, ​​C47, C48) are used for input and output power filtering to ensure the stability and purity of the regulated output and remove power supply noise.

[0037] Among them, see Figure 6 The buck converter circuit diagram of the utility model includes an input power supply (J1, J2): the input is a 24V DC voltage. Fuse (FA): provides overcurrent protection. Rectifier diode (D1): prevents voltage reverse. Filter capacitor (C1, C2, C3, C4): used for filtering the input power supply, removing power supply noise, and providing a stable input voltage. AP8851 voltage regulator chip (U1): the core buck regulator, which reduces the input 24V voltage to 10V output. Inductor (L4) and filter capacitor (C5, C11, C12): form an output filter network to ensure the stability and smoothness of the output voltage. Feedback circuit (R1, R2, R3, R4, D2): used for feedback control of the voltage regulator to ensure accurate regulation and stability of the output voltage.

[0038] The dual-path protection circuit comprises a first protection circuit and a second protection circuit, wherein the first protection circuit is connected to the first MCU, and the second protection circuit is connected to the second MCU.

[0039] Embodiment 1: Application and implementation of a non-contact safety lock switch device.

[0040] In order to demonstrate the principle of the technical solution of the present utility model, the application of the non-contact safety lock switch device in an industrial environment is described in detail below through specific embodiments.

[0041] In an automated production workshop, there are multiple working areas involving high temperature, high pressure or high-speed moving parts. In order to ensure the safety of operators, these areas are usually equipped with protective door devices. However, traditional protective door devices have many problems, including:

[0042] 1. Reliability issues: Traditional mechanical locks are prone to wear in high temperature, high humidity or dusty environments, resulting in frequent failures.

[0043] 2. High maintenance cost: Frequent replacement and maintenance of mechanical parts and wired connections increase operating costs.

[0044] 3. Strong power dependence: Traditional systems require external power supply, which increases the complexity of the system and fails when the power is interrupted.

[0045] 4. Single signal source: Relying on a single mechanical switch or sensor signal, it is easy to cause misoperation or missed operation, which reduces the safety of the system.

[0046] In order to solve the above problems, the utility model provides a non-contact safety lock switch device system based on non-contact data communication and energy acquisition mechanism.

[0047] In the embodiment of the utility model, the MCU controls the reader to send a radio frequency signal through the transmitting antenna. After the electronic tag enters the working area of ​​the radio frequency signal, it generates an induced current and obtains energy, and then is activated and sends its own number information through the built-in radio frequency antenna. After receiving the number information, the MCU determines whether to allow the protective door to be opened. This non-contact communication method reduces the wear and failure caused by physical contact, and can work reliably in harsh environments, especially, improving the reliability and durability of the system.

[0048] 1. When the electronic tag enters the radio frequency signal area, it uses the induction current to obtain energy and sends the number information after being activated. It does not require external power supply, which reduces the maintenance cost and complexity of the system and improves the flexibility and adaptability of the system.

[0049] 2. Through the collaborative control of dual MCUs, the two MCUs jointly control the back-end circuit. Even if one MCU fails, the other MCU can still work normally to ensure the continuity of the system. This design improves the redundancy and safety of the system and ensures the reliability of the system at critical moments.

[0050] 3. MCU controls the switch lock after comprehensive judgment based on the status of the electronic tag, photoelectric switch and other signals. For example, by using the photoelectric switch to detect whether there is a person or object near the protective door, it can effectively prevent misoperation and ensure the reliability and safety of the protective door device in actual application. Through this multi-signal source comprehensive judgment mechanism, the intelligence level and safety of the system are improved.

[0051] The specific implementation steps are as follows:

[0052] 1. Install the transmitting antenna on the inside of the protective door frame and stick the electronic tag on the outer surface of the protective door.

[0053] 2. Install the photoelectric switch on the edge of the protective door to detect people or objects near the protective door.

[0054] 3. Connect the two MCUs to the reader, transmitting antenna, photoelectric switch and back-end circuit respectively.

[0055] 4. When the operator approaches the protective door, the photoelectric switch detects the presence of the person, the MCU starts the reader, and the transmitting antenna sends a radio frequency signal. After the electronic tag enters the radio frequency signal area, it is activated and sends the number information. After receiving the information, the MCU confirms the identity and controls the switch lock to open the protective door. When the person leaves the protective door area, the photoelectric switch detects that there is no person, and the MCU controls the protective door to close and lock.

[0056] The utility model solves many problems of traditional protective door devices by adopting the non-contact safety lock switch device system provided by the utility model:

[0057] 1. Improved system reliability and durability: Contactless data communication reduces physical wear and tear and failures.

[0058] 2. Reduced maintenance costs and system complexity: Energy acquisition and activation mechanisms eliminate the need for external power supply.

[0059] 3. Enhanced system security and continuity: Dual MCU collaborative control ensures high redundancy and reliability of the system.

[0060] 4. Improved intelligence level: comprehensive judgment mechanism of multiple signal sources prevents misoperation.

[0061] 5. Easy to maintain and expand: Modular design reduces maintenance costs and improves the scalability and flexibility of the system.

[0062] In summary, the non-contact safety lock switch device system of the utility model effectively solves the technical problems in the traditional protective door device through an innovative technical solution, and significantly improves the reliability, safety and intelligence level of the system. Example

[0063] The utility model provides a non-contact safety lock switch device system based on non-contact data communication and energy acquisition mechanism to solve the above problems. The specific implementation scheme is as follows:

[0064] 1. Contactless data communication: In this system, the MCU controls the reader to send radio frequency signals through the transmitting antenna. After the electronic tag enters the working area of ​​the radio frequency signal, it generates an induced current and obtains energy, and then is activated and sends its own number information through the built-in radio frequency antenna. After receiving the number information, the MCU determines whether the protective door is allowed to be opened. This contactless communication method reduces the wear and failure caused by physical contact, and can work reliably in harsh environments, improving the reliability and durability of the system. For example, in a high-temperature and dusty industrial environment, traditional mechanical locks and wired systems are prone to failure due to environmental influences, while the contactless communication system of the utility model can work stably.

[0065] 2. Energy acquisition and activation mechanism: When the electronic tag of this system enters the radio frequency signal area, it uses the induction current to obtain energy, and sends the number information after being activated, without the need for external power supply. This energy acquisition and activation mechanism reduces the maintenance cost and complexity of the system and improves the flexibility and adaptability of the system. For example, in some mobile devices or temporary work areas where it is difficult to lay power lines, this system can avoid the trouble of power supply layout and related maintenance work.

[0066] 3. Dual MCU collaborative control: This system uses dual MCUs (HC32L136 and HC32L130) to jointly control the back-end circuit. Even if one MCU fails, the other MCU can still work normally to ensure the continuity of the system. This design improves the redundancy and safety of the system. For example, in dangerous working areas with high reliability requirements, even if one control unit fails, the system can continue to operate to ensure the safety of personnel and equipment.

[0067] 4. Comprehensive judgment of multiple signal sources: MCU controls the switch lock after comprehensive judgment based on the status of electronic tags, photoelectric switches and other signals. For example, by using the photoelectric switch to detect whether there are people or objects near the protective door, it can effectively prevent misoperation and ensure the reliability and safety of the protective door device in practical applications. For example, when there are people near the protective door, the photoelectric switch can detect and prevent the protective door from closing accidentally, thereby avoiding accidents.

[0068] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0069] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A non-contact safety lock switch device, comprising an MCU, a reader, a transmitting antenna, an electronic tag, a photoelectric switch and a back-end circuit, characterized in that: The MCU controls the reader to send a radio frequency signal through the transmitting antenna, and non-contact data communication is performed between the radio frequency signal and the electronic tag; When the electronic tag is located in the working area of ​​the radio frequency signal, the electronic tag generates an induced current and is activated, and the electronic tag sends its own number information through a built-in radio frequency antenna; The MCU controls the switch lock according to the status of the electronic tag, the photoelectric switch and other signals; The MCU and another MCU jointly control the back-end circuit.

2. A non-contact safety lock switch device according to claim 1, characterized in that: The MCU is connected to the reader via a signal line, and the transmitting antenna is connected to the reader; The photoelectric switch is connected to the MCU via a signal line, and the electronic tag is connected to the MCU via wireless communication; The two MCUs are connected to the back-end circuit via signal lines respectively to form a dual-path control.

3. A non-contact safety lock switch device according to claim 1, characterized in that: The photoelectric switch is arranged at the edge of the protective door and is used to detect whether there is a person or an object near the protective door.

4. A non-contact safety lock switch device according to claim 1, characterized in that: The transmitting antenna is arranged on the inner side of the protective door frame, and the electronic tag is arranged on the outer surface of the protective door.

5. A non-contact safety lock switch device according to claim 1, characterized in that: The back-end circuit includes a power module and a control module. The power module provides power to the MCU and the reader. The control module controls the opening and closing of the switch lock according to the instruction of the MCU.

6. A non-contact safety lock switch device according to claim 1, characterized in that: It also includes a dual-path protection circuit, which includes a first protection circuit and a second protection circuit. The first protection circuit is connected to the first MCU, and the second protection circuit is connected to the second MCU.

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