Journal of Robotics, Networking and Artificial Life, Vol. 3, No. 3 (December 2016), 197-200

The New Design of an Acousto-Optic Device
with a Mobile Power PackYi-Yu Lu1, Wen-Bin Lin, Zheng-Ying Li

Department of Electrical Engineering, Far-East University
No. 49, Zhonghua Rd., Xinshi Dist., Tainan City, 74448, Taiwan
E-mail: yiyulu@cc.feu.edu.tw

Abstract
The new designed acousto-optic device has adjustable, it is 1.5 times to extend its length. Fitting plastic optic fiber
into transparent tube, the path of light can be increased and the light area will be enlarged. The device can present
different color mode of light with RGB and high light LEDs as the light source. Adding the USB charge anddischarge function into the device, make it has the function of mobile power pack.
Keywords: Multifunction, acousto-optic warning device, mobile power pack.

1. Introduction
Traffic batons plays an important role in policemen
daily works. Their accoutrements also need a flashlightand whistle when on duty, and thus this study aimed tointegrate these into one device. This work thus presents
the design of a single apparatus with the functions of a
glow stick, warning system and camping light in theform of an acousto-optic warning device. The
multifunctional acousto-optic device with a mobilepower pack will be introduced for the demand ofamusement and convenient consideration.
A typical flashlight is constructed from a light bulb andfocusing mirrors, and over the last twenty years lightemitting diodes (LEDs) have been applied on more
lighting devices, as they can reduce electricity
consumption and have a long lifecycle. Flashlightmanufacturers are also facing the product innovationand orientation problem and how to improve theapplications and extend the product life-cycle.
Moreover, since smartphones can also work as
flashlights, the flashlight industry is facing a crisis offalling sales. Further investigate the destruction ofmobile phone innovation, just like the original online
music under carrier service arise, causing the collapse of
the traditional record industry is facing the same crisis[1]. Today, the mobile phone also undermine innovationin many industries began to face a crisis of survival.
Flashlight if not actively seek to change, they may face
the fate of being eliminated.
This study thus presents the design of a multifunctional
acousto-optic warning device with a mobile power packusing plastic optical fiber [2]. Since the late 1990s, highperformance plastic optical fiber based on
perfluorinated polymers began to appear on themarketplace [3-4], but it has not yet been used in
flashlights. Plastic optical fiber has the advantage ofbending easily and not breaking, and its falling pricemeans that it is now used for medical and recreational
purposes. The advantages of the area of the light guide
path increasing are implemented for this acousto-optic
device design.
Conventional flashlights usually project light in only
one direction only, and while this enables of directivity

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Yi-Yu Lu, Wen-Bin Lin, Zheng-Ying Li

and concentration, the relation between the light sourceand direction of sight is unclear, and thus people may beunsure of the location of the light source [5]. This is an
issue that could be improved.
2. Materials and methods

A 555 Oscillator is a type of relaxation oscillator forgenerating stabilized square wave output waveforms ofeither a fixed frequency of up to 500 kHz or of varying
duty cycles from 50 to 100%. The OP amplifier 741 isused to increase the volume. The warning function
circuit is shown in Fig. 3.

The device includes five major parts: (1) adjustablefocus, (2) plastic optical fiber, (3) LED driver, (4)battery, and (5) micro USB power pack. The structureof multifunction acousto-optic warning device isdepicted in Fig. 1.
Figure 3. The warning function circuit

2.2. USB power pack
The USB boost and buck module are shown in Figs. 4and 5.

Figure 1. The multifunctional acousto-optic warning device.

Figure 4. USB boost module

2.1. Hardware
The basic circuit of the microcontroller unit (MCU) isshown in Fig. 2. The related program is written in KeilC.

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Figure 2. MCU circuit

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The New Design of2.3. Software
The flowchart and interrupt subroutine for the
acoustooptical warning device are depicted in Fig. 6.

combines a flashlight and a baton, and can be used
when camping and to make warning sounds. On theother hands, it introduced the design of polymer opticalfiber and lithium battery for energy-conservation andincreasing efficiency consideration. Further, since it
includes RGB LEDs, it can be used as a glow stick inconcerts. The LEDs can make the light cover the whole
flashlight via the optical fiber. The flashlight has anadditional micro USB charging socket. The multifunctional design is the goal of various products now.
This design has already been patented as a multi audible
warning device at the Intellectual Property Office ofTaiwan on September 21, 2014. Images of different
colors of flash lighting are shown in Fig. 7.

Figure 6. Flowchart for acousto-optic warning device

3. Results and Discussion
The device comprises three subsystems which are RGB
LED, warning system and mobile power pack. Be able
to give consideration to people’s recreation and demandof amusement at the same time, an acousto-optic
warning device with multifunction was designed. The
transparent tube used in the device contains a plastic
optical fiber, which is not currently seen in any similar
product. The tube can increase the light guide andimprove the luminous area. The device uses both RGB
LEDs and high-brightness white LEDs as dual lightsources, thus enabling different patterns of light andcolor, so the device is both functional and usable. The
flashlight can be extended to 1.5 times its length,
increasing the light guide and the illuminated area. In
addition, the use of a USB charge and dischargefunction from lithium battery means that this device canalso work as a mobile power pack.
The body of the flashlight is flexible, and it isconvenient for use at night and for directing traffic. It

Figure 7. Photos of different colors of flash lighting

4. Conclusions
The design have functionality and practicability
concurrently. The concept of a multifunctional acoustooptic warning device is introduced in this work. A
multifunction acousto-optic warning device has
obtained our country's new patent for this study. There
are multifunction in this device which are as the trafficPublished by Atlantis Press
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Yi-Yu Lu, Wen-Bin Lin, Zheng-Ying Li

baton, camping light, glowing sticks in the concert andusing for women's security at night, etc. The new
designed acousto-optic device has adjustable, it is 1.5
times to extend its length. The advantage of this device
is that when the body is exposed outside the transparent
tube, the LED light source can diffuse along the lightguide, and thus the lamp body can be projected in one
direction, and so achieve the effect of centralized
lighting. The structure also has the effect ofconcentrated and omni-directional diffusion of light.

Acknowledgements
This work was in part supported by the Ministry of
Science and Technology, Taiwan, Republic of China,
under the research grants 104-2815-C-269-018-E.

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