Murata IMX-070 Manual de usuario

1murata.com Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017

1Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017

Pyroelectric Infrared Sensor

Evaluation Board:IMX-070, IMX-060

Quick Start Guide

2

Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017

Pyroelectric infrared Sensor

Evaluation Board: IMX-070, IMX-060

•It's a Evaluation Board to know how Pyroelectric Infrared

Sensor(IRA-S210ST01) working and performance.

–Specifications

•Rated Voltage : 3.3V

•Output signal : analog, comparator

•Dimension : 48×30mm

3

Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017

Quick Start Guide : Pyroelectric Infrared Sensor

Every objects emit IR(=Infra-Red) ray in

respond to its temperature.

Pyroelectric Infrared Sensor detects "change"

of IR distribution within its sensing area.

* sensing area is determined by lens design.

Amplifier and comparator circuits on evaluation

board amplifies sensor’s output signal and

generate digital High/Low signal. (Next page)

(Please make sure lens is attached on board.)

Pyroelectric Infrared Sensor

Amplifier &

Comparator

Circuit

4

Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017

Hardware Operation

PIR

AOUT

COUT

(H/L)

AMP

Infra-Red

Comparators

(window

comparator)

While there's no IR distribution

change, AOUT is 1.65V and COUT

is HIGH(=3.3V). When it detects

that, AOUT varies and once AOUT

crosses threshold, COUT falls to

LOW(=0V).

In the sample code, we detect this

COUT change with GPIO external

interruption and IRQ handler sets a

flag which is periodically monitored

in main loop.(Next page)

AOUT

COUT

5

Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017

Software Operation : Sample Code Flow Chart

Measurement Start

f_PIR == true

Display

“IR change detected!!”

F_PIR = false

YES

NO

Wait 100ms

Interruption Handling

F_PIR = true

Done

6

Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017

Pin Connection

Pin connection to each CPU board is also

instructed in sample code.

Evaluation board



Arduino

UNO

VCC

3.3V

GND

GND

COUT

D2

AOUT

A0

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