In modern society, various machines are constantly integrated into our daily lives, playing a vital role in our surroundings. Bearings, motors, pumps, and other components have become critical elements of industrial civilization, and their temperature and condition directly impact the health and efficiency of entire industrial automation systems.
For a long time, sensor technology has been at the core of monitoring applications. With the growing demand in the industrial automation market and advancements in sensor technology, temperature and vibration measurement have evolved from separate systems to integrated solutions. Temperature and vibration sensors are integrated vibration data loggers that combine embedded technology, temperature sensor technology, and vibration sensor technology. They can simultaneously collect data across three mechanical axes and are suitable for online measurement of temperature and vibration in rotating equipment such as motors, generators, gearboxes, fans, air compressors, centrifuges, and submersible pumps. As a monitoring tool with such a wide range of applications, there are inevitably many different data transmission methods available. Next, we will review several commonly used transmission methods for temperature and vibration sensors on the market.
Option 1: LoRa Wireless Transmission
LoRa temperature and vibration sensors, also known as LoRa temperature and vibration data loggers, can be integrated with LoRa gateways and environmental monitoring platforms to form a LoRa temperature and vibration monitoring system. The LoRa temperature and vibration data logger uses LoRa wireless communication to transmit collected parameters-such as machine surface temperature and vibration velocity-to the LoRa gateway. The LoRa gateway then transmits these parameters to a backend server via 4G or other means. Authorized personnel can log into the environmental monitoring platform via a mobile device or computer to view changes in parameters such as machine surface temperature, vibration velocity, and vibration displacement, thereby gaining a comprehensive understanding of the machinery's operational health.
The LoRa Temperature and Vibration Data Logger utilizes wireless spread-spectrum communication technology, eliminating the need for wiring throughout the entire data transmission process, making it suitable for environments where cable installation is impractical. It features a built-in 19,000mAh high-capacity battery, and combined with its low power consumption, it can last up to 8 years. When the battery runs out, it can be easily continued by replacing the lithium-thionyl chloride battery. The housing is made of 304 stainless steel with an IP67 protection rating, and a single LoRa gateway can support multiple monitoring points.
Note: The LoRa gateway supports data upload via 4G, Ethernet (ETH), and RS-485 communication protocols; users can select the appropriate method based on their operational environment.
Option 2: RS-485 Transmission
The RS-485 temperature and vibration sensor, also known as an RS-485 temperature and vibration transmitter, can be integrated with an environmental monitoring host, network data logger, and environmental monitoring platform to form an RS-485 temperature and vibration monitoring system. The RS-485 temperature and vibration transmitter transmits collected machine surface temperature and three-axis data to the environmental monitoring host or network data logger via RS-485 signals. The environmental monitoring host or network data logger then forwards this data to the environmental monitoring platform. Authorized personnel can view real-time data on a computer to monitor the operational health of the machinery.
The RS-485 temperature and vibration transmitter operates on a wide-range DC power supply of 10–30 V. The housing is made of stainless steel with an IP67 protection rating, making it suitable for dry, humid, and noisy environments while being waterproof and dustproof. The signal output is immune to environmental interference, ensuring safe and stable operation. With a transmission range of up to 2,000 meters, it meets the requirements of most application scenarios.
Note: If there are few measurement points, a network data logger can be selected to reduce costs while still meeting your needs.
Option 3: Analog Output
Analog temperature and vibration sensors, also known as analog temperature and vibration transmitters, convert vibration signals from machinery into analog outputs. Through a PLC's data module, vibration data from each measurement point is collected and uploaded to a host computer, allowing personnel to monitor vibration velocity, displacement, and temperature changes at each point in real time.
Analog temperature and vibration transmitters also operate on a wide DC voltage range of 10–30 V. They feature built-in MEMS chips for high measurement accuracy; with an IP67 protection rating, a stainless steel housing, and internal potting technology, they offer significant flexibility for various applications.
Temperature and vibration sensors are available in a variety of mounting styles, including magnetic, threaded, and, in some applications, adhesive-mounted. In the increasingly advanced field of industrial technology, these sensors play a vital role by helping various industries identify potential mechanical hazards that are difficult for the average person to detect. They reduce the costs of major machinery repairs, effectively extend the service life of equipment, and have become an essential component of industrial machinery monitoring.