Sensors and Actuators最新文献_第8页

Solid polymer electrolyte-based electrochemical oxygen sensor 基于固体聚合物电解质的电化学氧传感器

Sensors and Actuators Pub Date : 1989-08-01 DOI: 10.1016/0250-6874(89)87055-6

Yan He-Qing, Lu Jun-Tao

引用次数: 25

pH-isfet used as a detector in a flow injection titration system ph值在流动注射滴定系统中用作检测器

Sensors and Actuators Pub Date : 1989-08-01 DOI: 10.1016/0250-6874(89)87056-8

Wang Gui-Hua, Yu Dun, Sun Yu-De

引用次数: 9

Integrated multi-function sensor for flow velocity, temperature and vacuum measurements 集成的多功能传感器流速，温度和真空测量

Sensors and Actuators Pub Date : 1989-08-01 DOI: 10.1016/0250-6874(89)87052-0

Huang Jin-Biao, Tong Qin-Yi

{"title":"Integrated multi-function sensor for flow velocity, temperature and vacuum measurements","authors":"Huang Jin-Biao, Tong Qin-Yi","doi":"10.1016/0250-6874(89)87052-0","DOIUrl":"10.1016/0250-6874(89)87052-0","url":null,"abstract":"<div>An integrated multifunction sensor based on heat transfer at a constant chip temperature (CCT) has been fabricated by a conventional CMOS process. It consists of a temperature-sensing stage for the measurement of the chip temperature, a CMOS operational amplifier for amplification and control, and a heating branch circuit to heat the sensor chip. All three parts are integrated on one chip and connected to form a negative feedback loop for CCT operation. Using this sensor, measurements of flow velocity, temperature and vacuum have been made. The heating power of the chip is used to indicate those measurands that affect the heat transfer between the chip and the ambient. When used for flow measurements, the sensor demonstrates high sensitivity and a large output level (500 mV output at Vf=50 cm/s, N2, and TcTa=15°C). It can be used to measure both gas and liquid flor velocities. The sensor shows a sensitivity of −64 mV/°C when used for temperature measurements and it has the advantage of much easier design of on-chip signal processing circuits over conventional temperature sensors since the chip temperature is kept constant. When used as a vacuum sensor, experiments show that the vacuum range from atmospheric pressure to 10−1 Torr produces an output change of about 300 mV. Lower pressures can also be measured without any problems.</div>","PeriodicalId":101159,"journal":{"name":"Sensors and Actuators","volume":"19 1","pages":"Pages 3-11"},"PeriodicalIF":0.0,"publicationDate":"1989-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0250-6874(89)87052-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81330589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Porosity control of humidity-sensitive ceramics and theoretical model of humidity-sensitive characteristics 湿敏陶瓷的孔隙控制及湿敏特性的理论模型

Sensors and Actuators Pub Date : 1989-08-01 DOI: 10.1016/0250-6874(89)87058-1

Sun Hong-Tao, Wu Ming-Tang, Li Ping, Yao Xi

{"title":"Porosity control of humidity-sensitive ceramics and theoretical model of humidity-sensitive characteristics","authors":"Sun Hong-Tao, Wu Ming-Tang, Li Ping, Yao Xi","doi":"10.1016/0250-6874(89)87058-1","DOIUrl":"10.1016/0250-6874(89)87058-1","url":null,"abstract":"<div>In this paper, a new method for porosity control of porous humidity-sensitive ceramics is presented. Graphite powder is chosen as the pore former. It is convenient to control the pore size and porosity of porous humidity-sensitive ceramics made from CoFe spinel and MgCr spinel by changing the content and grain size of the pore former. The electrical behaviours can be kept stable for a long time because of the completeness of the solid phase reaction. Experiments indicate that when the weight percentage of graphite is 10–20 wt.%, the humidity sensitivity of these two porous ceramics increases remarkably and the linearity of the resistance and humidity characteristics is clearly improved. It has been shown by XRD, SEM and AES analyses that graphite powder has only a slight influence on the matrix material, but its pore-forming effects are quite favourable. From the electronic—ionic comprehensive conduction model, and use of Grotthuss' transmission mechanism and the phase law of two mixed phases, a new equation of resistance and humidity has been derived theoretically, thus successfully explaining the experimental data. Moreover, the characteristics of resistance and humidity, and those of capacitance and humidity of various types of materials can be determined.</div>","PeriodicalId":101159,"journal":{"name":"Sensors and Actuators","volume":"19 1","pages":"Pages 61-70"},"PeriodicalIF":0.0,"publicationDate":"1989-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0250-6874(89)87058-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77336661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 63

A new sputtered amorphous thin-film pressure transducer 一种新型溅射非晶薄膜压力传感器

Sensors and Actuators Pub Date : 1989-08-01 DOI: 10.1016/0250-6874(89)87053-2

Huang Jun-Qin, Cheng Xian-An, Wang Zhi-Ying

引用次数: 4

Temperauture-humidity-gas multifunctional sensitive ceramics 温度-湿度-气体多功能敏感陶瓷

Sensors and Actuators Pub Date : 1989-08-01 DOI: 10.1016/0250-6874(89)87059-3

Zhou Zhi-Gang, Zhao Gang, Wei Ming, Zhang Zhong-Tai

引用次数: 25

Signal superimposition of piezoresistive pressure transducers 压阻式压力传感器的信号叠加

Sensors and Actuators Pub Date : 1989-08-01 DOI: 10.1016/0250-6874(89)87054-4

Yu Lian-Zhong, Bao Min-Hang