Internet of Things pressure transmitter

Abstract

The utility model provides an internet of things type pressure transmitter comprising a pressure sensor, a conditioning chip and a five-pin wiring terminal, the five-pin wiring terminal comprises a power supply VCC port, a power supply GND port, a data line SDA port, a clock line SCL port and a switch KEY port, the data line SDA port is connected with an SDA pin of the conditioning chip, and the conditioning chip is connected with the switch KEY port. The clock line SCL port is connected with an SCL pin of the conditioning chip, the switch KEY port is connected with a PD pin of the conditioning chip, the power supply VCC port is connected with an AVDD pin of the conditioning chip, and the power supply GND interface is connected with an EP pin and a GND pin of the conditioning chip. The product can directly carry out IIC or SPI digital communication with a single-chip microcomputer, processing and display of pressure signals are facilitated, and a remarkable low-power-consumption mode is also very suitable for various occasions powered by batteries.

Description

Technical Field

[0001] The utility model mainly relates to the technical field related to pressure sensors, and specifically to an Internet of Things pressure transmitter. Background Art

[0002] With the rapid development of the Internet of Things, pressure sensors connected to the Internet of Things are becoming more and more widespread, and higher requirements are being placed on the convenient connection of sensors to the Internet of Things. Therefore, designing a pressure transmitter with an Internet of Things interface is of great significance for the application of pressure transmitters in the Internet of Things industry. Currently, there are many common problems with analog output pressure transmitters: the analog output signal cannot be directly connected to the Internet of Things, and must pass through the ADC analog-to-digital conversion circuit before it can be connected and processed by the microcontroller and converted into a digital signal output. The power supply and power consumption of analog electronic components are relatively large, and they cannot be powered by batteries or the batteries need to be replaced frequently due to high power consumption, causing many inconveniences during the measurement process; the current pressure transmitter has a fixed working mode and cannot switch the working mode according to actual conditions, making it difficult to achieve the requirements of ultra-low standby power consumption. Utility Model Content

[0003] In order to address the shortcomings of current technology, the utility model combines existing technology and, based on practical applications, provides an Internet of Things type pressure transmitter. This product can directly communicate with the single-chip microcomputer through IIC or SPI digital communication, which is convenient for processing and displaying pressure signals. Its significantly low power consumption mode is also very suitable for various battery-powered occasions.

[0004] The technical solution of the utility model is as follows:

[0005] An Internet of Things (IoT) pressure transmitter comprises a pressure sensor, a conditioning chip, and a five-pin terminal block. The conditioning chip supplies power to the pressure sensor, and the output signal of the pressure sensor enters the conditioning chip. The five-pin terminal block comprises a power supply VCC port, a power supply GND port, a data line SDA port, a clock line SCL port, and a switch KEY port. The data line SDA port is connected to the SDA pin of the conditioning chip, the clock line SCL port is connected to the SCL pin of the conditioning chip, the switch KEY port is connected to the PD pin of the conditioning chip, the power supply VCC port is connected to the AVDD pin of the conditioning chip, and the power supply GND interface is connected to the EP pin and GND pin of the conditioning chip.

[0006] Furthermore, the transmitter also includes a 4.7K resistor R9 and a resistor R8, wherein both ends of the resistor R9 are connected to the data line SDA port and the power supply GND port respectively, and both ends of the resistor R8 are connected to the clock line SCL port and the power supply GND port respectively.

[0007] Furthermore, the conditioning chip model is NSA2862X.

[0008] Furthermore, the pressure sensor is an oil-filled diffused silicon sensor.

[0009] Furthermore, the power supply of the transmitter is 3.5-5.5VDC.

[0010] Beneficial effects of the utility model:

[0011] 1. This product can directly communicate with the microcontroller via IIC or SPI digital communication, which facilitates the processing and display of pressure signals. Its significantly low power consumption mode is also very suitable for various battery-powered occasions.

[0012] 2. This product can adjust a variety of different working modes and provide a separate low-power control line to the outside world, making it very suitable for industries or places that are sensitive to power consumption requirements, such as the Internet of Things. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attachment Figure 1 This is the circuit diagram of the utility model.

[0014] Attachment Figure 2 This is the principle diagram of the utility model. DETAILED DESCRIPTION

[0015] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the contents of this invention, those skilled in the art may make various changes or modifications to the present invention, and that such equivalent forms also fall within the scope defined in this application.

[0016] This embodiment provides an Internet of Things type pressure transmitter. Figure 2 As shown in the figure, the main principle of this pressure transmitter is: the pressure sensor and the pressure conditioning chip are transmitted through analog signals, and the pressure conditioning chip forms an IIC digital signal related to the pressure range. The digital signal is output through the IIC interface and can be easily connected to the Internet of Things with the help of a low-power MCU.

[0017] refer to Figure 1 As shown, in this embodiment, the product mainly includes a pressure sensor, a conditioning chip and a five-pin terminal block.

[0018] The pressure sensor uses an oil-filled diffused silicon pressure sensor isolated by a stainless steel corrugated diaphragm. The measured pressure is transmitted through the isolation diaphragm and the silicone oil injected into it to a silicon pressure-sensitive chip with a precise Wheatstone bridge mechanical structure, achieving precise conversion between the measured pressure and the analog signal. The conditioning chip model is NSA2862X. The five-pin terminal block includes a power supply VCC port, a power supply GND port, a data line SDA port, a clock line SCL port, and a switch KEY port. The data line SDA port is connected to the conditioning chip's SDA pin, the clock line SCL port is connected to the conditioning chip's SCL pin, the switch KEY port is connected to the conditioning chip's PD pin, the power supply VCC port is connected to the conditioning chip's AVDD pin, and the power supply GND port is connected to the conditioning chip's EP pin and GND pin. The 4.7K resistor R9 connects the data line SDA port and the power supply GND port, respectively. The 4.7K resistor R8 connects the clock line SCL port and the power supply GND port, respectively.

[0019] This product is powered by a wide power supply (3.0 to 5.5V DC). Pressure data is not proportional to the power supply, but rather corresponds to a percentage of the full-scale value of the 24-bit ADC (the most significant bit is the sign bit). The pressure sensor conditioning chip U1 powers the pressure sensor. The pressure sensor's output signal enters the conditioning chip, which internally converts the mV signal into a digital signal. The conditioning chip processes this signal to form an IIC digital signal related to the pressure range. This digital signal is output through the IIC interface, facilitating integration into the Internet of Things.

[0020] This product features a dedicated pin, KEY, for switching operating modes. When this pin is high, the product enters standby mode. In this mode, the product is "off," the chip does not operate, and I2C communication is impossible. When this pin is low, the product enters active mode, the chip performs switching operations, and the device supports I2C communication access. This control line is similar to the traditional "CS" chip select signal.

Claims

1. An Internet of Things pressure transmitter, comprising a pressure sensor, a conditioning chip, and a five-pin terminal block, wherein the conditioning chip supplies power to the pressure sensor, and the output signal of the pressure sensor enters the conditioning chip, characterized in that: The five-pin terminal includes a power VCC port, a power GND port, a data line SDA port, a clock line SCL port and a switch KEY port. The data line SDA port is connected to the SDA pin of the conditioning chip, the clock line SCL port is connected to the SCL pin of the conditioning chip, the switch KEY port is connected to the PD pin of the conditioning chip, the power VCC port is connected to the AVDD pin of the conditioning chip, and the power GND interface is connected to the EP pin and GND pin of the conditioning chip.

2. The Internet of Things pressure transmitter according to claim 1, characterized in that: The transmitter further includes a 4.7K resistor R9 and a resistor R8, wherein both ends of the resistor R9 are connected to the data line SDA port and the power supply GND port respectively, and the both ends of the resistor R8 are connected to the clock line SCL port and the power supply GND port respectively.

3. The Internet of Things pressure transmitter according to claim 1, characterized in that: The conditioning chip model is NSA2862X.

4. The Internet of Things pressure transmitter according to claim 1, characterized in that: The pressure sensor is an oil-filled diffused silicon sensor.

5. The Internet of Things pressure transmitter according to claim 1, characterized in that: The power supply of the transmitter is 3.5-5.5VDC.

Images