Inductive proximity sensor for asibus interface

Abstract

The utility model provides an inductance type proximity sensor of ASI bus interface, including sensor body, the sensor body includes cap, tube shell and tail cap, the both ends of tube shell install cap and tail cap respectively, the tail cap one side is provided with LED, the cap inside installation magnetic core, the tube shell is hollow structure, installs PCB board in the tube shell, and the magnetic core is adjacent with one end of PCB board, and the other end of PCB board is provided with a plurality of insertion pins, the insertion pin is used for with ASI bus interface connection. The utility model has the beneficial effects: the utility model combines ASI bus interface and inductance type proximity sensor, realizes the simplification wiring through integrated ASI bus interface, improves data transmission rate and reliability, enhances system expansion and flexibility, has remarkable advantage in wiring efficiency, versatility, cost saving and system maintenance etc. aspect, has wide application prospect and market value in ASI communication technical field.

Description

Technical Field

[0001] This invention belongs to the field of ASI communication technology, and in particular relates to an inductive proximity sensor with an ASI bus interface. Background Technology

[0002] With the continuous advancement of industrial automation technology and the expansion of application fields, the traditional ASI bus interface with sensors has certain limitations in terms of interface compatibility, complex wiring, low data transmission rate and reliability, and inconvenience in terms of wiring efficiency, versatility, cost saving and system maintenance. Therefore, this utility model provides a new type of inductive proximity sensor with an ASI bus interface. Utility Model Content

[0003] In view of this, the present invention aims to propose an inductive proximity sensor with an ASI bus interface to solve the limitations of traditional ASI bus interface sensors in terms of complex wiring and low wiring efficiency.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] An inductive proximity sensor with an ASI bus interface includes a sensor body, which includes a cap, a housing, and a tail cap. The housing has a cap and a tail cap installed at its two ends respectively. An LED is provided on one side of the tail cap. A magnetic core is installed inside the cap. The housing is a hollow structure, and a PCB board is installed inside the housing. One end of the PCB board is adjacent to the magnetic core, and a plurality of pins are provided at the other end of the PCB board. The pins are used to connect to the ASI bus interface.

[0006] The outer side of the tube shell is provided with external threads, and the tube shell is connected to the ASI bus interface of the AS1 master station through the external threads.

[0007] Furthermore, the cap is located on the outermost layer of the sensor, forming a sealed structure with both ends of the tube shell to protect the internal electronic components.

[0008] Furthermore, the pin is an electrical connection terminal, and the pin uses a two-wire system.

[0009] Furthermore, the cap, tube shell, and tail cap are all made of stainless steel and have an IP67 protection rating.

[0010] Furthermore, the PCB board is equipped with a PNP / NO circuit and an ASI4U chip. The PNP input pin and the 24VDC pin of the ASI4U chip are both connected to the PNP / NO circuit. The 24VDC pin is the DC power input pin of the ASI4U chip, used to receive 24V DC voltage. The PNP input pin is the input interface for receiving the output signal of the PNP / NO circuit.

[0011] Compared with existing technologies, the inductive proximity sensor with an ASI bus interface described in this invention has the following advantages:

[0012] The inductive proximity sensor with an ASI bus interface described in this invention combines an ASI bus interface with an inductive proximity sensor. By integrating the ASI bus interface, it simplifies wiring, improves data transmission rate and reliability, and enhances system expansion and flexibility. It has significant advantages in wiring efficiency, versatility, cost savings, and system maintenance, and has broad application prospects and market value in the field of ASI communication technology. Attached Figure Description

[0013] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0014] Figure 1 This is a schematic diagram of the sensor structure described in an embodiment of the present utility model;

[0015] Figure 2 This is a partial circuit diagram on the PCB board according to an embodiment of the present invention;

[0016] Figure 3 This is a schematic diagram of the wiring between the sensor and the ASI bus interface according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Cap; 2. Magnetic core; 3. PCB board; 4. Tube shell; 5. Pin; 6. LED; 7. Tail cap. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 3 As shown, the inductive proximity sensor with an ASI bus interface includes a cap 1, a magnetic core 2, a PCB board 3, a housing 4, pins 5, an LED 6, and a tail cap 7. The housing 4 has a cap 1 and a tail cap 7 installed at its two ends respectively. The magnetic core 2 is installed inside the cap 1. The PCB board 3 is installed inside the housing 4. One end of the PCB board 3 is adjacent to the magnetic core 2, and several pins 5 are provided at the other end of the PCB board 3. An LED 6 is provided on one side of the tail cap 7.

[0024] In this embodiment, the cap 1 serves as external protection and magnetic field focusing, located on the outermost layer of the sensor, and provides mechanical protection. The magnetic core 2 is installed inside the cap 1 to focus the magnetic field and improve detection sensitivity. It forms a sealed structure with both ends of the tube shell 4 to protect the internal electronic components.

[0025] In this embodiment, the magnetic core 2 is the core for generating and modulating the magnetic field. It is installed inside the cap 1 and is the magnetic field source of the inductive sensor. It generates an alternating magnetic field, and when a metal object approaches, the oscillation is attenuated due to the eddy current effect. It is adjacent to the PCB board 3 to realize the coupling between the magnetic field and the circuit (existing technology).

[0026] In this embodiment, PCB board 3 is for signal processing and interface control, serving as the main control center of the sensor and integrating the ASI bus communication protocol. One end of PCB board 3 is adjacent to magnetic core 2 to receive the sensing signal, and the other end is equipped with pin 5. Existing signal filtering and analog-to-digital conversion circuits can be installed on PCB board 3 to realize the digitization of analog signals. A two-wire connection with the ASI bus is achieved through pin 5.

[0027] In this embodiment, the outer side of the housing 4 is provided with external threads, which are mainly used to facilitate the installation and fixation of the sensor and the AS1 master station. It can be adapted to different specifications of mounting brackets or equipment interfaces, enhance the structural stability after installation, and prevent loosening in industrial vibration environments. At the same time, the thread and the seal can further improve the waterproof and dustproof performance, ensuring reliable operation under harsh working conditions. The housing 4 serves as a structural support and internal encapsulation, acting as the outer shell of the sensor and providing mechanical support and electromagnetic shielding. Caps 1 and tail caps 7 are installed at both ends to form a complete sealed structure. The PCB board 3 is housed inside the housing 4 to ensure a stable working environment for electronic components.

[0028] The sensor achieves non-contact metal detection, ASI bus digital communication, and plug-and-play installation through the coordinated operation of four components: cap 1, magnetic core 2, PCB board 3, and tube shell 4. It has wide application value in the field of industrial automation.

[0029] In this embodiment, pin 5 is an electrical connection terminal located at the other end of PCB board 3. It serves as the connection interface between the sensor and the ASI bus, enabling the input and output of ASI bus signals. It supports a two-wire design (power line and signal line are transmitted in the same cable) and adopts a piercing installation technology to achieve plug-and-play functionality, simplifying the installation and debugging process.

[0030] Two-wire design refers to a wiring method where power and signal lines are transmitted in the same cable, a common wiring technique in industrial sensors. In this ASI bus interface inductive proximity sensor, the two-wire design offers the following advantages: Simplified wiring: Integrating power and signal into a single cable reduces wiring complexity; Plug and play: Combined with piercing installation technology, no complex debugging is required; Cost savings: Reduces the number of cables and installation time; Transmission distance: Supports signal transmission up to 200 meters; Improved wiring efficiency and reduced installation and maintenance difficulty; Enhanced system scalability and versatility; Suitable for harsh industrial environments (IP67 protection rating); Particularly suitable for industrial automation scenarios requiring simplified wiring and improved installation efficiency.

[0031] In this embodiment, LED6 is a status indicator that provides visual feedback on the sensor's operating status. It can display power status, detection status, or fault alarms, facilitating on-site debugging and system monitoring, and improving maintenance efficiency. The combined use of pin 5 and LED6 enables the sensor to: achieve digital communication via the ASI bus interface; support a maximum transmission distance of 200 meters; and provide high reliability and system scalability.

[0032] In this embodiment, the cap 1, housing 4, and tail cap 7 are made of stainless steel with an IP67 protection rating, possessing corrosion resistance and acid and alkali resistance, ensuring stable operation of the sensor in harsh industrial environments. This material selection effectively protects internal electronic components, and the sealed design achieves mechanical protection and environmental isolation. It is also compatible with the two-wire design and puncture-type mounting technology of the ASI bus system, simplifying on-site installation and maintenance procedures.

[0033] This invention combines an ASI bus interface with an inductive proximity sensor. By integrating the ASI bus interface, it simplifies wiring, improves data transmission rate and reliability, and enhances system expansion and flexibility. It has significant advantages in wiring efficiency, versatility, cost savings, and system maintenance, and has broad application prospects and market value in the field of ASI communication technology.

[0034] In this embodiment, the PCB board 3 is equipped with a PNP / NO circuit and an ASI4U chip. The PNP input pin and 24VDC pin of the ASI4U chip are both connected to the PNP / NO circuit. The 24VDC pin is the DC power input pin of the ASI4U chip, used to receive 24 volts of DC voltage to provide the power required for the chip's operation. The PNP input pin is the input interface for receiving the output signal of the PNP / NO circuit. Its function is to convert the detection signal of the PNP type inductive proximity sensor in industrial scenarios (such as the level change when a metal object approaches) into a digital signal conforming to the AS-Interface V3.0 protocol, so that it can be transmitted to the AS-I master system via the AS-i bus. The ASI4U is an AS-Interface V3.0 compliant chip manufactured by Renesas Technology, mainly responsible for handling the communication protocol, data transmission, and physical layer interface functions of the AS-i bus. It supports power and signal transmission on the same cable and is the core component for the sensor to achieve digital communication via the ASI bus interface.

[0035] This invention's sensor internally connects to the ASI bus interface. The PCB board 3 integrates the existing AS-i communication protocol and analog signal filtering algorithms. Furthermore, the existing analog-to-digital converter circuit within the PCB board 3 can convert analog signals into digital signals, increasing the data transmission distance (up to 200 meters). This simplifies the sensor's data acquisition and transmission process, improving transmission efficiency and compatibility. Simultaneously, it employs a two-wire design (power and signal lines are transmitted in the same cable) and a piercing mounting technique, enabling plug-and-play functionality and easy installation and debugging.

[0036] It should be noted that this utility model only improves the structure of the sensor and does not improve the control program. The control program and electrical components involved are all existing technologies.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An inductive proximity sensor with an ASI bus interface, characterized in that: The sensor body includes a cap (1), a tube shell (4) and a tail cap (7). The cap (1) and tail cap (7) are respectively installed at both ends of the tube shell (4). An LED (6) is provided on one side of the tail cap (7). A magnetic core (2) is installed inside the cap (1). The tube shell (4) is a hollow structure. A PCB board (3) is installed inside the tube shell (4). One end of the PCB board (3) is adjacent to the magnetic core (2). Several pins (5) are provided at the other end of the PCB board (3). The pins (5) are used to connect to the ASI bus interface. The outer side of the casing (4) is provided with external threads, and the casing (4) is connected to the ASI bus interface of the AS1 master station through the external threads.

2. The inductive proximity sensor with an ASI bus interface according to claim 1, characterized in that: The cap (1) is located on the outermost layer of the sensor and forms a sealed structure with both ends of the tube shell (4) to protect the internal electronic components.

3. The inductive proximity sensor with an ASI bus interface according to claim 1, characterized in that: The pin (5) is an electrical connection terminal, and the pin (5) is a two-wire system.

4. The inductive proximity sensor with an ASI bus interface according to claim 1, characterized in that: The cap (1), tube shell (4) and tail cap (7) are all made of stainless steel and have an IP67 protection rating.

5. The inductive proximity sensor with an ASI bus interface according to claim 1, characterized in that: The PCB board (3) is provided with a PNP / NO circuit and an ASI4U chip. The PNP input pin and the 24VDC pin of the ASI4U chip are both connected to the PNP / NO circuit.

6. The inductive proximity sensor with an ASI bus interface according to claim 5, characterized in that: The 24VDC pin is the DC power input pin of the ASI4U chip, used to receive 24V DC voltage.

7. The inductive proximity sensor with an ASI bus interface according to claim 5, characterized in that: The PNPinput pin is the input interface for receiving the output signal of the PNP / NO circuit.

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