Development ofpower self-sufficiency system
Osaka Electro-Communication University
Tameda Laboratory
Daiki Shinto

1Research background
DIMS experimentobservation equipment• Observation equipment
will be installed in each of
CLF, BRM, and Hinckley.
• CLF has no power source.
• Power self-sufficiency systemneeds to be installed in CLF.

Installation location in Utah, USA

Wiring diagram of observation equipment

2

Purpose of research<Research>• I’m developing power self-sufficiency system that can bepermanently installed in Utah, USA.
<Purpose>• Search for Nuclearite.

3

Overview of power self-sufficiency system
Power supply

Power supply

DCDC
converter

Solar panel(Many sheets)

Chargecontroller

DCDC
converter
DCDC
converter

Control ofsupplied power

Battery(Manybatteries)

Observationequipment usedfor
DIMS experimentControl of
supplied voltage
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Observation equipment for DIMS experiment• This wiring diagram isthe equipment to beused inDIMS experiment.

Wiring diagram of observation equipment
5Power required for DIMS experiment
Table 1: Power list for DIMS experiment• It was operated equipment in the table by batteries and solar panels.
• It is necessary to decide whether the power supply voltage is 12V system or 24V system.

6

Measurement of voltage at
which the PC operates stably<Purpose>• Determination of the using batteryvoltage.
• It measure the lowest voltage that
the PC(BLKNUC7I7DNHE) can alwaysuse.

PMM18-2.5DU（Multi output DC regulated power supply）
Specification：0~3A・0~18V

INT-BLKNUC7I7DNHE
Specification：
12V~24V・15W

PC voltage measurement<Measuring method>• The output voltage of the multi output
DC regulated power supply is reduced
at regular intervals.
• I recorded the voltage and current
output each time, and grasped
the voltage and current when
the power of the PC was turned off.
Wiring diagram for PC voltage measurement

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Measurement of voltage at which the PC
operates stably
Table 2: When starting with an operating voltage of 18.45V

Table 3: When starting with an operating voltage of 17.45V

Table 4: When starting with an operating voltage 16.45V

Table 5: When focusing on time

<Result>• The result was different from the PC specifications.
• In Table 5, I focused on the operating time of the PC, but it was not particularly relevant.
<Consideration>• There may be a problem with the DC plug or wire that connects the PC to the power supply.
• It is possible that the current of the PC was stronger than expected and the power supply could not withstand.
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Measurement of voltage at which the PC
operates stably• The power supply, lead wire, and DC plug were changed tothose that can handle high output currents, and the same
experiment as last time was conducted.
GPR-1820HD（Multi output DC regulated power supply）
Specification：0~18V・0~20A

Multi output DC regulated power supply

9Measurement of voltage at which the PC operates stably
Table 6: When starting with an operating voltage of 18V

Table 7: When the voltage that starts the PC is changed every time

Table 8: Start with the rated voltage of the PC of 12V
and lower the voltage every hour

<Result>• This time the result was as expected.
• It turned out that if the operating voltage of the PC is at least 10V, it can operate
without problems.
<Consideration>• When the PC is started at 12V or less, the output current value becomes large,
so the 24V system has less anxiety.

10Multipurpose camera power measurement<Purpose>• The voltage to be stepped down anddistributed by the DCDC converter isdetermined by grasping the power ofthe multipurpose camera.
<Measuring method>• The output voltage of the multi output regulated
power supply is reduced at regular intervals
within the permissible range of the multipurpose
camera.
• I recorded the voltage and current output eachtime to see if the multipurpose camera works asspecified.

DisplayHDMI

Multipurposecamera

Lead wire

Multi output DC
regulated power supply

Wiring diagram for power measurement ofmultipurpose camera

Model number :ME20F-SH
Specification :11V~17V・12W

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Multipurpose camera power measurement<Result>• The result was as specified by
the multipurpose camera.
• In Table 9, the current value
increased a little at startup,
but it was stable after that.
<Consideration>• This time, I just started
the multipurpose cameraand did not shoot.
• It is thought that the current value
rises a little when shooting witha multipurpose camera.
• Since the dedicated connection jackis rated at 1A, the voltage ofthe multipurpose camera isconsidered to be 14V, which allows
shooting of meteors without anxiety.
• 24V system is required for
power self-sufficiency system!

Table 9: When starting with an operating voltage of 16V andgradually lowering the voltage

Table 10: When starting with an operating voltage of 15V andlowering the starting voltage each time12Operation test of power self-sufficiency system(Overview)
Specification：12V・36W
Voltage logger

LED lightSolar panel

Model number：KC125TJ
Specification：125W・17.4V・7.2A

Sun saverModel number：SS-20L

Battery

Model number：JR100-12
Specification：12V・100Ah（10 hour rate）
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Operation test of power self-sufficiency system<Purpose>• Use LED lights as a substitute for the equipment used in
the DIMS experiment and check if the power self-sufficiency system
can operate normally.
<Test method>• It install the power self-sufficiency system in a place withgood sunlight.
• A voltage logger is used to measure changes in the voltage ofthe solar panel and battery every minute.
• It measure for 7 days and check if the power self-sufficiency systemis operating normally from changes in voltage.
14Voltage (V)Operation test of power self-sufficiency system
18Irradiation
time

16

14
12
10: Battery: Solar panel

9/16

9/17

9/18

9/19

9/20

9/21

9/22

9/23

9/24

9/25

Battery and solar panel voltage changes

Time (day)<Result>• It turned out that the power self-sufficiency system was operating normally.
• Since the battery voltage rises when the solar panel voltage is increasing,it can be seen that it is operating without problems.
15Summary• We are developing a power self-sufficiency system that can bepermanently installed at in CLF.
• We grasped the power of the equipment of the power self-sufficiencysystem.
• We checked the operation of the power self-sufficiency system.

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Power self-sufficiency system (1) for the heater
Charge controller
12 V, 32 A

• Power consumption of the heater is 100W
• Requirement• Batteries should be charged in a day (8h)• Capability of 3 days operation of 10h
without charge• Power consumption is
3,000 Wh = 100W x 10h x 3• Batteries (12 V, 100 Ah, deep cycle)

Solar panel
12 V, 100 W x 4• Total capacity is 250Ah = 3,000Wh / 12V• Three batteries will be enough.

• Solar panels (12V, 100W)• Charge current is 8A = 100W / 12V• 4 panels with parallel-connection• 4 ~ 250Ah / (8A x 8h)• Charge controller
Battery
12 V, 100 Ah x 3• 12 V, 32 A
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Power self-sufficiency system (2) for
the PC and camera, HDD • Power consumption of the PC and camera,
Charge controller
24 V, 18 A

Solar panel
24 V, 150 W x 3Battery
12 V, 100 Ah x 4HDD are 63W• Requirement• Batteries should be charged in a day(8h)• Capability of 3 days operation of 10h
without charge• Power consumption is1,890 Wh = 63W x 10h x 3• Batteries (12 V, 100 Ah, deep cycle)• This connects 12V batteries in series.
• Total capacity is 135Ah = 1,890Wh / 14V• Four batteries will be enough.
• Solar panels (24V, 150W)• Charge current is 6A = 150W / 24V• 3 panels with parallel-connection• 3 ~ 135Ah / (6A x 8h)• Charge controller• 24 V, 18 A18

Power self-sufficiency system (3) forremaining equipment• Power consumption of remaining
Charge controller
12 V, 20 A

equipment is 47W• Requirement• Batteries should be charged in a day (8h)• Capability of 3 days operation of 10h
without charge• Power consumption is1,410 Wh = 47W x 10h x 3• Batteries (12 V, 100 Ah, deep cycle)

Solar panel
12 V, 100 W x 4• Total capacity is 118Ah = 1,410Wh / 12V• Two batteries will be enough.

• Solar panels (12V, 100W)• Charge current is 4A = 47W / 12V• Four panels with parallel-connection• 4 ~ 118Ah / (4A x 8h)• Charge controller
Battery12 V, 100 Ah x 2• 12 V, 16 A
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What to do and research plan
<What to do>• Development of power self-sufficiency system using a DCDC converter.
• I perform a shooting test with a multipurpose camera.
• We make a total of three power self-sufficiency system.
• Actually I perform a meteor observation test in Japan using
a power self sufficiency system.
• A power self-sufficiency system will be installed in CLF to analyze meteors andNuclearite based on observation data.

<Research plan>
2020

2021
~December

2021
January

Operation check and completion of Test of meteor observation using
power self-sufficiency systema power self-sufficiency system
in JapanFebruary
・Modification of power selfsufficiency system
・Analysis of data acquired bymeteor observation
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