What Is a Wireless Temperature Sensor?
Technologies that can be used for wireless data transmission include WIFI, 433, Zigbee, etc .;
- Chinese name
- Wireless temperature sensor
- Features
- Miniaturization, digitization, intelligence, etc.
- Wireless transmission without wiring
- Small size and easy installation
- Low power consumption and long service life
- High sensitivity and long transmission distance
- Real-time and accurate, safe and reliable
- Technologies that can be used for wireless data transmission include WIFI, 433, Zigbee, etc .;
- Zigbee, WiFi, and 433MHz wireless technologies are all short-range wireless communication technologies, and all use ISM license-free frequency bands, but they each have their own characteristics.
- ZigBee is characterized by low power consumption, high reliability, strong anti-interference, and easy network deployment. The wireless repeater can easily extend the network coverage to dozens of times. But compared to WiFi technology, Zigbee is positioned for applications with low transmission rates.
- WiFi is characterized by a high data transmission rate and supports the "always on" function. However, it has large power consumption, low reliability, and low performance. The sleep wakeup time of WiFi devices usually takes 3 ~ 5 seconds.
- 433MHz technology uses the 433MHz wireless frequency band. The advantage is that the wireless signal has strong penetrability and can spread farther. The disadvantage is that the data transmission rate is low and the data transparent transmission protocol is used, so its network security and reliability are also poor.
- The wireless temperature sensor should be a wireless sensor network product that integrates sensing, wireless communication, and low power consumption technologies. The wireless temperature sensor should be battery-powered, avoiding the laying of large amounts of communication cables, pipelines and power supply lines during the implementation of the project. The user can also conveniently adjust the installation position according to the actual situation of the site.
- Wireless sensors can be configured with temperature and humidity sensing elements, temperature sensing elements, pressure sensing elements, gas sensing elements, as well as various sensors such as flow, displacement, switching, rainfall, wind speed and direction.
- Wireless temperature sensors are used in water supply network, gas supply network, oil supply network, environment, medical and health, manufacturing, chemical industry, energy, meteorology, storage, refrigeration, freezer, constant temperature and humidity production workshop, office, etc. field.
Overview of wireless temperature sensors
- In the industrial and power industries, the normal operation of electrical equipment guarantees the normal operation of society and the normal life of the people, so the reliability of the equipment is vital. Many enterprises advocate preventive maintenance of equipment, and temperature is the most important monitoring parameter in preventive maintenance. Too high or too low temperature means the possibility of failure. The realization of online temperature monitoring is an important means to ensure the safe operation of high-voltage equipment.
- High temperature overheating directly causes the mechanical strength and physical properties of electrical materials to decrease, and the contact resistance value increases. Under continuous flow conditions, the device connection point oxidation will be accelerated. The oxidation result will cause the contact resistance value to continue to increase, heat generation, and temperature to continue to rise. Causes high temperatures and overheating. The problem of high temperature overheating is a continuous development process. If it is not controlled, the degree of overheating will continue to increase. The contact resistance value increased by each temperature change will increase the heat of the next cycle and increase the temperature. The working condition of the connector is further deteriorated, so a vicious cycle is formed, which seriously affects the service life of electrical equipment.
- The traditional temperature measurement method has a long cycle, complicated construction, low efficiency, and inconvenient management. When a fault occurs, it takes a lot of human physical inspection and re-laying of cables. In some cases, the monitoring points are scattered, the environment is closed, or there is high voltage, and many temperature measurement methods cannot achieve the measurement.
- Wireless temperature monitoring and early warning system (NT1000) is a high-tech product integrating advanced sensing technology, digital identification technology, wireless communication technology, low power consumption technology, anti-interference technology and automation control technology. Sensor, background management system. It can realize on-site, remote online monitoring and early warning of equipment temperature changes under a variety of harsh environmental conditions, which is convenient for maintenance personnel to grasp the equipment operation status in a comprehensive and timely manner. It is specifically applied to various contacts and connection points of electrical equipment, such as: busbar connectors, cable connectors, outdoor knife switch contacts, transformers and motor lead connectors. The system can display the distribution of the entire temperature field in the form of an electronic map, which can clearly find abnormal temperature points and determine hidden troubles. Take measures in advance to avoid accidents.
Wireless temperature sensor components
- Wireless temperature sensor icon (7 photos)
- Wireless temperature sensor: It consists of three parts: control unit, wireless data transmission and temperature measurement. After the temperature measurement, the temperature data is wirelessly transmitted to the temperature measurement communication terminal. It is mainly installed on the surfaces of cable connections, transformers, and switches that are prone to heat. Each wireless temperature sensor has a unique ID number. The actual installation location of each sensor is recorded and entered into the computer database of the temperature detection workstation together with the number. The sensor automatically transmits the temperature data of the monitoring point once every certain time (can be set in advance). When the temperature is abnormal, it will immediately alarm and it will not be limited by the sending cycle.
- Temperature measurement communication terminal (temperature display): installed in the centralized control room, responsible for receiving temperature data sent by each wireless temperature sensor, stored in the database for long-term, real-time display of monitoring points.
- Temperature measuring station: responsible for receiving centralized display, analysis and processing of temperature data uploaded by each temperature display instrument. Through the background monitoring software installed on the PC, the position and temperature change of each temperature measurement point are displayed in the form of an electronic map, and the remote monitoring is performed online in real time.
Classification and Application of Wireless Temperature Sensor
- The application field of the wireless temperature sensor, the wireless sensor is a commonly used detection instrument, has the advantages of no wiring, convenient installation and low energy consumption, and is widely used in many industries. At present, wireless temperature sensors are mainly used in large granaries, drug warehouses, and large laboratories. Let me introduce the application fields of wireless temperature sensors. [1]
- During the storage of grain, the heat will be slowly released, which will cause the internal temperature of the grain to rise slowly. If the temperature change of the inner grain cannot be understood in time, this will bring great losses. If ordinary temperature sensors are used for temperature measurement at this time, not only a large amount of wiring is required, but also the installation is very inconvenient.
- The use of a wireless temperature sensor will save these troubles. The wireless temperature sensor can save a lot of manpower, and it is not necessary to check from time to time. If it is connected to a ventilation device, the wireless temperature sensor will sense that the temperature parameter exceeds the preset value At that time, the corresponding ventilation equipment is automatically started to cool down. For a large-scale grain warehouse, only a small number of people are needed to check the temperature of each location of the warehouse at any time, which greatly saves labor costs.
- Laboratory
- In some high-tech laboratories, not only a dust-free environment is required, but the temperature requirements are also very precise. If traditional temperature sensors are used, it also requires human labor to operate, and it is often difficult to achieve precise control. And using a wireless temperature sensor, set the temperature and humidity range in advance, automatically trigger the refrigerator and the ventilation system, you can perfectly control the temperature and humidity within the required range.
- 2. Drug store [1]
- We also need to have a good grasp of the temperature of the drug library, because once the temperature of the drug is too high, it will easily deteriorate. If the deteriorated drug is sold, it will endanger human health. At this time, if manpower is used for temperature control, unnecessary resources are often wasted. With the wireless temperature sensor, the temperature and humidity can be adjusted for different requirements, without the need to consume much human resources.
Wireless temperature sensor technical indicators
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Wireless temperature sensor technology features
Development stages of wireless temperature sensors
- (1) Traditional discrete wired temperature sensor (including sensitive components);
- (2) Analog integrated temperature sensor / controller;
- (3) Intelligent temperature sensor.
Application field of wireless temperature sensor
- Suitable for high voltage electricity transmission and application industries, such as power, steel, mining, petrochemical, etc.
- Temperature detection of electrical contacts such as contacts and busbars of high-voltage equipment such as high-voltage switch cabinets, transformers, high-voltage cables and other industries
Wireless temperature sensor case
- Application of Bluetooth in wireless temperature sensing
- The Bluetooth wireless temperature sensor system is based on Bluetooth's serial port application model SPP (SerialPortProfile) to achieve transparent transmission of wireless data. It writes its own upper-layer application program on top of the core protocol stack. CSR's Bluetooth core protocol stack includes HCI, LZCAP, SDP, RFCOMM, etc. It is provided to developers in the form of firmware. User-written applications and protocol stacks run together in the CSR embedded environment. In the CSR program, messages can be sent asynchronously between different tasks. When each task is created, one of them can have a message queue, and the other submits the message sent to the task to the message queue. The task scheduler automatically Run to get the message for the task.