手持式油位计  

Handheld Type Oil-level Meter

作　　者：雷建龙[1] 

机构地区：[1]武汉船舶职业技术学院电子系,湖北武汉430050

出　　处：《仪表技术与传感器》2007年第9期11-13,共3页Instrument Technique and Sensor

基　　金：湖北省教育厅重点科研项目(2004X170)

摘　　要：手持式油位计以超声波换能器作为传感器件,实现了油位的非接触测量;以单片机为主控器件,用光电耦合器将超声波发射电路与系统隔离,提高了系统的稳定性;接收部分采用集成锁相环LM567检测接收到的信号,降低了成本;使用单总线数字温度传感器DS18B20对声速进行补偿,对产生读出DS18B20数据错误的原因进行了分析并解决了这一问题;电源电路采用高效率芯片ICL7663,实现了单节干电池供电;显示采用液晶显示模块,减少了能耗;整个系统达到了设计的要求。In the handheld type oil-level meter, the ultrasonic sensor was used as transducer to detect the oil-level which was achieved by no contact; the stability was improved by using the MCU as the main controller and the optoelectronic coupler to separate the emitting circuit from the system; the cost is reduced by using the LM567 to receive the ultrasonic waves; the 1-wire bus digital tempera- ture sensor DS18B20 was employed to compensate the voice speed,the cause of the error when reading the device was analyzed and also the problem was solved; the high efficient chip ICL7663 was employed in the power supply circuit to achieved the single battery power supply; the LCD module was used in the display to reduce the energy consume. By all of above,the design requirements is achieved.

关 键 词：油位计 超声波换能器 单片机 DSL8820 LM567 ICL7663 

分 类 号：TB517[理学—物理] TP212.9[理学—声学]