Research On Design And Implementation Of Novel Sensor Label Based On Inkjet Printing Technology

With the rapid development of logistics and transportation,smart wear,medical electronics and other fields,the importance of flexible electronics has gradually become apparent.As the core component of human flexible wearable devices,flexible sensors have the characteristics of good mechanical properties,good ductility,portable and bendable,and flexible and diverse structural forms,which can be arbitrarily arranged according to the requirements of measurement conditions,and can be very convenient for complex to be measured Detection.In the transportation of perishable goods such as logistics transportation,temperature monitoring is very important.In order to transfer the data measured by temperature sensors in a timely manner and improve the efficiency of the logistics chain,RFID technology and a flexible temperature sensor external to the chip are used to form a new type of wireless temperature sensor.The system can not only realize the short-distance transmission of information,enhance the expandability of tags,but also make possible a single-use temperature sensing system.The main work of the paper is as follows:1.Completed the manufacturing process design,parameter matching optimization,and simulation analysis of 2D and 3D flexible temperature sensors based on inkjet printing technology,including the selection of thermally conductive materials,flexible substrates for sensors,and interlayer media,and effects on sensor sensitivity and measurement.Optimization of materials and process parameters for important indicators such as temperature range,and simulation analysis and verification;2.Completed the production and test verification of 2D and 3D snake-shaped flexible sensors that can meet the Internet of Things applications.PI film with excellent temperature resistance was selected as the flexible substrate,and nano-silver ink was used as the sensor material.The performance was successfully manufactured.Good 2D snake sensor.In order to make the sensor more miniaturized,a 3D snake-shaped flexible sensor is designed and manufactured.The test results show that the 3D temperature sensor can measure temperature in the range of-20??100?,and the temperature measurement sensitivity is greater than 4.5?/?,the maximum non-The linear error is less than 4%and the longest response time is less than 56s,which meets the design indicators of this article;3.Aiming at the wireless transmission of the information of the off-chip flexible temperature sensor designed in this paper,the design of the RFID tag baseband based on the ISO/IEC 18000-6C protocol is completed.Two voltage-controlled oscillators are used to convert the temperature information within-20??100? into a frequency value to quantify the temperature into a count value.After the tag is powered up,the sensor starts to quantify,and the reader sends an ACK command to return the quantized transmission Sense data.A large reduction in baseband power consumption was achieved by tailoring the memory and access group commands.Comprehensive simulation results show that the optimized baseband power consumption is 33.64 ?W(34.93%reduction)and the area is 43110 ?m2(46.7%reduction),The theoretical value of temperature quantification accuracy is 1?,which meets the design requirements.The research results of this paper use a combination of flexible sensors and RFID technology to achieve rapid measurement of low-cost wireless networking over a wide temperature range of-20??100?,which can be widely used in cold chain logistics and other Internet of Things,and has good practical value.