传感器英文课件

Future package 2 x 2 x 0.9 mm3 Operating condition:


power supplies 2.7 V consume only 450 μA can be power-cycled for even greater battery life The typical noise floor is 200 μg per rtHz, allowing small tilt changes to be sensed using the narrow bandwidths (<10 Hz) typical of human motion
Example: LevelElectrical signal

The information is perceived by the sensor, which consists of two main parts: the sight tube on the tank and the operator’s eye, which generates an electric response in the optic nerve. The sight tube by itself is not a sensor, and in this particular control system, the eye is not a sensor either. Only the combination of these two components makes a narrow-purpose sensor (detector), which is selectively sensitive to the fluid level.
Department of Optical Engineering
Zhejiang University
What are we going to cover?

Human/Animal Sensors Sensor Performance Characteristics Strain Gauge Basics Capacitive Sensors and Accelerometer (ADXL50) Piezoelectric / Pressure Sensors Thermometers/Flow Sensors Radiation Sensors; IR Sensors Inductive and Magnetic Sensors (Hard Disk read-write head) Sounding Measurement Chemical Sensors Gyroscopes
Department of Optical Engineering
Zhejiang University
Sensor: A Definition


A sensor is a device that receives a stimulus and responds with an electrical signal. (maybe optical in near future) The term stimulus :

Application:

Department of Optical Engineering
Zhejiang University
Introduction

What can modern sensors do?

Detect brain wave to control computer mouse (2006)…..
What in this course……



Extend your knowledge in optics and electronics to a realm of application Case Study: exemplary modern sensors A little bit of Entrepreneurship education

We may say that a sensor is a translator of a generally non-electrical value into an electrical value.
Department of Optical Engineering
Zhejiang University
Today
Department of Optical Engineering
Zhejiang University
Accelerometers

What can modern sensors do?

Miniature Accelerometer, Coloumbia Research Lab
Detect linear acceleration with high precision for industrial and military applications

Department of Optical Engineering
Zhejiang University
A look at modern sensors
Department of Optical Engineering
Zhejiang University
Electronic Nose

Sensor head - Big size More work needs to be done for it to be deployed in a robot

Power consumption Channel number/flexibility
Department of Optical Engineering
Department of Optical Engineering
Zhejiang University
Biological sensors – an introduction

Physical limits to the measurement of certain signal

Temperature fluctuation in finite objects
Zhejiang University
Industry’sБайду номын сангаасSmallest Accelerometer


Size: 4 x 4 x 1.45 mm3 Manufacture: Analog Device

ADXL32x family of iMEMS (integrated micro electro mechanical system) accelerometers
Department of Optical Engineering
Zhejiang University
Introduction

Modern Sensors are penetrating into our life:




Medical: Angioplasty, Infusion Pumps, Blood Pressure, Kidney Dialysis, Respiratory Automotive: Tire Pressure, MAP, Fuel and Engine Control Systems, Barometric Industrial: Portable Gauges, Manometers, Altitude Measurements, Barometry, Water Depth Consumer: iphone, ipad,…ieverything

What can modern sensors do?

Detect 2,4,6-trichloroanisole (TCA) in wine aroma at partper-trillion levels in seconds (10-12) (Znose by Electronic Sensor Technology)

Heat capacity or mass Air speed/turbulence Limited by environmental disturbance

Audio background noise limits hearing capability

Broadband audio noise in jungle
Department of Optical Engineering
Zhejiang University
Pyroelectric Infrared Radial Sensor Product Description

Model: D203S





Encapsulation Type: TO-5 Window Size: 4× 3 mm2 Spectral Response: 5-14μm Output Signal [Vp-p]: ≥3300mV Sensitivity: ≥3100 V/W Detectivity (D*): 1. 4 × 108 cmHz1/2/W Noise [Vp-p]: <70mV Supply Voltage: 3-15V Operating Temp: -30-70ºC security systems, burglar alarms, visitor acknowledgement, light switch control and intellectualized toy, etc.

Detect suspicious gases Olfactory image Chemical fingerprints
Department of Optical Engineering
Zhejiang University
Electronic Nose

How does the Nose look like?
Aromatic compounds in wine
Department of Optical Engineering
Zhejiang University
Electronic Nose

A vapor analysis system for homeland security after 9-11

The stimulus is the quantity, property, or condition that is sensed and converted into electrical signal.

The purpose of a sensor is to respond to some kind of an input physical property (stimulus) and to convert it into an electrical signal which is compatible with electronic circuits.
Department of Optical Engineering
Zhejiang University
Major Industry Players
Analog Devices Columbia Research Labs Capacitec EG&G ICSensors Endevco Humphrey Kistler Instruments Lucas Novasensor MTI Instruments Inc. PCB Piezotronic Quantum Research Group Raytek Sensors Magazine Silicon Designs Strain Measurement Devices Summit Instruments Thermometrics Vishay Intertechnology Yellow Springs Instruments