Sensor based on Ethernet communication and network cascade

Abstract

The utility model discloses a sensor based on Ethernet communication and network cascade, which comprises an MCU microprocessor, a switch chip, a first network interface, a second network interface, a third network interface and a sensor chip, and the first network interface, the second network interface and the third network interface are in communication connection with the switch chip through a BACnet protocol. The switch chip is in electric signal connection with the MCU microprocessor, and the sensor chip is in electric signal connection with the MCU microprocessor; wherein the second network interface is used for being in cascade connection with a next sensor, and the third network interface is used for being in cascade connection with a previous sensor or being connected with a network controller. According to the utility model, the second network interface and the third network interface are cascaded with the upper and lower sensors, and signal forwarding is carried out through the switch chip, so that a plurality of sensors are cascaded on one network line, and wiring is simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of Internet of Things sensors, and in particular to a sensor based on Ethernet communication and network cascading. Background Art

[0002] A sensor is a device used to measure and monitor ambient temperature and humidity. It usually uses a digital sensor as a probe and converts temperature and humidity into standard network signals through a reliable digital processing circuit for transmission and monitoring over the network.

[0003] Sensors are important equipment in smart buildings. They play an important role in building automation systems. They can monitor various environmental parameters in the building in real time and transmit data to the building automation system, providing the system with accurate environmental information to facilitate control of the building environment.

[0004] Existing sensors are connected to the junction box using an electrical port (RS-485 communication interface), and then connected to the controller through the junction box wiring for signal transmission. One wire connects one device, and each device is independently connected to the network controller. However, there are many sensors in the building, which results in many wires and a long wiring time. Utility Model Content

[0005] The utility model aims to solve the above technical problems and provide a sensor based on Ethernet communication and network cascade to realize the cascade of front and rear sensors.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A sensor based on Ethernet communication and network cascading, comprising an MCU microprocessor, a switch chip, a first network interface, a second network interface, a third network interface, and a sensor chip, wherein the first network interface, the second network interface, and the third network interface are all connected to the switch chip for communication via a BACnet protocol, the switch chip is connected to an MCU microprocessor by electrical signals, and the sensor chip is connected to an MCU microprocessor by electrical signals; wherein the first network interface is used to connect to a debugging device to debug the MCU microprocessor, the second network interface is used to cascade with the next sensor, and the third network interface is used to cascade with the previous sensor or to connect to a network controller.

[0008] Furthermore, the sensor chip is one of a temperature and humidity sensor chip, a CO detection sensor chip, and a CO2 detection sensor chip.

[0009] The utility model provides a sensor based on Ethernet communication and network cascading, which has the following beneficial effects: by adopting the above technical scheme, the second network interface and the third network interface are cascaded with the upper and lower sensors, and the signal is forwarded through the switch chip, so that multiple sensors are cascaded on a network line, making the wiring simpler, and there is no need for each sensor device to be connected to the network controller, thereby reducing the number of network port points of the network controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings:

[0011] Figure 1 A schematic diagram of the structure of a sensor based on Ethernet communication and network cascade provided by the utility model.

[0012] Explanation of the numbers in the figure: 1. MCU microprocessor; 2. Switch chip; 3. First network interface; 4. Second network interface; 5. Third network interface; 6. Sensor chip. DETAILED DESCRIPTION

[0013] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] It should be noted that all directional indications in the embodiments of the present invention (such as up-down-left-right-front-back...) are only used to explain the relative position relationship - movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0016] like Figure 1As shown, a sensor based on Ethernet communication and network cascade includes an MCU microprocessor 1, a switch chip 2, a first network interface 3, a second network interface 4, a third network interface 5, and a sensor chip 6. The first network interface 3, the second network interface 4, and the third network interface 5 are all connected to the switch chip 2 through the BACnet protocol, the switch chip 2 is connected to the MCU microprocessor 1 by electrical signals, and the sensor chip 6 is connected to the MCU microprocessor 1 by electrical signals; wherein the first network interface 3 is used to connect the debugging device to debug the MCU microprocessor 1, the second network interface 4 is used to cascade with the next sensor through a network cable, and the third network interface 5 is used to cascade with the previous sensor through a network cable or connected to a network controller. Specifically, the sensor chip 6 is one of a temperature and humidity sensor chip, a CO detection sensor chip, and a CO2 detection sensor chip.

[0017] By adopting the above technical solution, the upper and lower sensors are cascaded through the second network interface 4 and the third network interface 5, and the signal is forwarded through the switch chip 2, so that multiple sensors are cascaded on a network line, making the wiring simpler, and each sensor device does not need to be connected to the network controller, reducing the number of network ports of the network controller; by assigning network addresses to different sensors, the signals of corresponding devices are transmitted between each other.

[0018] The parts not involved in this technical solution can be implemented by using existing technologies.

[0019] The above shows and describes the basic principle, main features and characteristics of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model includes the attached claims and their equivalents.

Claims

1. A sensor based on Ethernet communication and network cascade, characterized in that: The invention comprises an MCU microprocessor (1), a switch chip (2), a first network interface (3), a second network interface (4), a third network interface (5), and a sensor chip (6); the first network interface (3), the second network interface (4), and the third network interface (5) are all connected to the switch chip (2) for communication via a BACnet protocol; the switch chip (2) is connected to the MCU microprocessor (1) via electrical signals; and the sensor chip (6) is connected to the MCU microprocessor (1) via electrical signals; wherein the first network interface (3) is used to connect to a debugging device to debug the MCU microprocessor (1); the second network interface (4) is used to cascade with the next sensor; and the third network interface (5) is used to cascade with the previous sensor or to connect to a network controller.

2. A sensor based on Ethernet communication and network cascade according to claim 1, characterized in that: The sensor chip (6) is one of a temperature and humidity sensor chip, a CO detection sensor chip, and a CO2 detection sensor chip.

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