Sohatsu Systems Laboratory Inc.

【Contents】

1.

Overview

・・・P1

2.

Feature・・・P1

3.

Effectiveness

・・・P2

4.

Comparison with Conventional Technology・・・P5

5.

On Site Adjustment

・・・P6

6.

Maintenance

・・・P6

7.

System Configuration

・・・P7

8.

Specifications(Touch Panel)

・・・P8

9.

Specifications(Panel)・・・P1010.

Quality・・・P12

11.

Standard Drawings

・・・P13

1.

Overview
Ventilation measurement control panel controls tunnel ventilation based on sensor measurement datasuch as visibility index meter (VI meter), carbon monoxide concentration meter (CO meter), winddirection anemometer (AV meter), and image vehicle detection equipment. There are two types ofventilation control: normal ventilation control and emergency (fire) ventilation control. In normal
ventilation control, FCVC (Feedforward + Feedback) control is adopted to maintain pollutant
concentrations (Visibility Index (VI), Carbon Monoxide Concentration (CO)) at standard values,
achieving energy efficiency.
During Emergency situations, particularly during fires, the ventilation control system utilizes speed
reduction measures to maintain a low longitudinal velocity inside the tunnel which helps to ensure asafe evacuation environment for tunnel users and supports firefighting and emergency rescue efforts by
the Fire department.
Additionally, it has a feature with a large touch panel (15 inch) for easy monitoring and operation.

2. Features■ Standard Equipment with Wind Speed Reduction Control!!
In case of emergency (fire), the safety is enhanced by controlling the wind speed reduction.
■Stabilizing Control with Wind Speed Feedback!!
In the feedback control, not only Visibility Index (VI) and carbon monoxide concentration (CO)but also wind speed is added to control to stabilize the JF operation and prevent excessive
ventilation and control hunting than the conventional control. (Method of controlling windspeed changing faster than visibility index (VI) and carbon monoxide concentration (CO))■ Large Screen Touch Panel(15 Inch) !!
Unlike the conventional ventilation control panels with many buttons on the surface, the new
design uses a touchscreen for fewer buttons. This makes it easier and smoother in operation.
■ Integration of Ventilation Control and Measurement Panels!!
Previously, two separate units were needed for ventilation control and measurement panels, but
now a single unit incorporates both functions.

13. Effectiveness■Safety Enhancement Effect of Standard Wind Speed Reduction Equipment
When a fire occurs, the heat and smoke from the fire flow downwind due to the main ventilation
airflow. In the event of congestion in bidirectional or unidirectional tunnels, stationary vehicles may
be present downstream of the fire, posing a safety concern. Therefore, in the event of a fire in thetunnel, widespread adoption of wind speed reduction control has been implemented to quickly
suppress the airflow, allowing heat and smoke to be detained in the ceiling area. The figure below

Accident Fire

JF operating quantity [％]Wind Speed[m/s]shows an example of wind speed reduction control using a ventilation power panel (inverter type).

ControlStart

JF operating
quantity [％]WindSpeed[m/s]This control panel is the first control panel with this wind speed reduction control asstandard equipment.
■Measurement Control Algorithm
Unlike traditional algorithms using pollutant concentration feedback, our productutilizes a cascade feedback control structure that combines feedforward (Trafficprediction and ventilation planning) with feedback from pollutant concentration andwind speed.
Measured Data
Traffic Counter（TC）

TrafficPrediction

Ventilation
Plan

Measured Data
VI Value
CO Value

VI/COFeedback

Wind speed(AV)
Feedback

Control Output

Target value
Wind speed

Setting Value
VI value
CO value

Measured Data
AV value

Stabilizing JF operation, our system prevents excess ventilation and control hunting by adding
wind speed to feedback control for Visibility Index (VI) and carbon monoxide concentration
(CO).

2

WindSpeed

VI[%]

Wind Speed[m/s]With velocity FB

VI[%]Wind Speed[m/s]Without Velocity FBVIWindSpeedVIcorrection

speed decreases.
JF operating quantity [％]JF operates with FB correction when wind

JF operating quantity [％]VI falls below 50% before JF runs with FB

JF gradually increased to improve VI on aJF drive is suppressed because JF is operated

declining trend

before VI is lowered.

■Improved Operation
The use of a large touchscreen panel enhances visibility, allowing easy monitoring of facility status.
Touchscreen controls also improve operability, preventing errors with features like confirmation
screens and indicating inactive buttons.

Conventional Panel

New Control Panel

Integrating warning lights into the touchscreen monitoring screen makes it easier to understand thefacility status. Plus, the 'Screen Hard Copy' feature allows saving the current facility status to a USB
memory for record-keeping.

Able to save the hard
copy of displayed screen
to USB」

3■Space Optimization
In conventional ventilation control panels, a separate measurement panel with a built-in measuring unit
was required. In this product, the measuring unit is built-in, providing both ventilation control panel andmeasurement panel functions in a single unit.

Conventional

Wind Speed (AV)

Carbon monoxide (CO)Measurement panel

VI meter

Ventilation Control Panel

Traffic Counter(TC)New Control Panel4

4. Comparison with Conventional Technology
Below is the comparison table with conventional technology.

Item Name

Conventional Ventilation Panel

Modern Panel

In bidirectional traffic tunnels, the ventilation power of vehicle traffic and the JF(Jet Fan) ventilation power offset each other, resulting in an increase in ventilationenergy.
NormalVentilation

FB control of VI and CO only.

E-notch (All JFs Stop) only
Emergency
Ventilation
Large number of Indicator lights.

Feedforward control and VI, CO, AV
feedback control.
JF operation becomes stable and excessive
ventilation and control hunting areprevented.
Low Velocity Control
Using Jet Fans in reverse operation rapidly
reduces wind speed, effectively maintaining
near-zero wind speed for improved safety.
Less number of Indicator light.
(Displayed on the status monitoring screen
built in touch panel)

Warning Light

Large number of push buttons

Less number of push buttons(Operation can be done by the modechangeover/manual notch/fire manual screen
built in the touch panel)

Visibility Index meter (VI)Wind speed meter (AV)
Carbon monoxide meter (CO)Visibility Index meter (VI)Wind speed meter (AV)
Carbon monoxide meter (CO)Image type traffic counter (TC)Integrated in a new modern panel

Operation
buttonMeasuring
Instrument
MeasuringUnitFire
detector unit

Invertor
Control (PLC)

Built in Separate panel
Built in separate panel for fire detector
unit

Built in separate panel for fire detector unit

Built in separate ventilation power
panel (Invertor Type)

Built in separate ventilation power panel(Invertor Type)55.

On Site Adjustment

The test items during on-site adjustment are listed below.
・Exterior Structural Inspection
・ Installation work status Inspection
Panel mounting conditions, wiring condition, condition status, Externalcable connections etc.
・Functional and performance Test
Power receiving, Panel ventilation fan operation, Panel lighting and outlet
circuit test.
Electric main circuit ground fault detection relay confirmation, control
power supply circuit test.
Sequencer abnormality detection function, status display, fault display,
general control function test, etc.
・External signal collection confirmation Test
Receiving and distribution、Disaster prevention, Remote controlequipment, Traffic measurement equipment
・Comprehensive operation Test
After all tests are completed, check the operation of each function.
・Operation Test
Operation condition setting, confirmation, measurement value recording

Installation

Inspection

TestOperation

6. Maintenance
The equipment, including components with a limited lifespan, is listed below.
The replacement cycle for equipment and components varies depending on usage and environmental
conditions, but the general guidelines are as follows
No.

Parts Name

Replacement Cycle

1

Touch Panel (Main body)

10 Years

2

Battery (Touch Panel and PLC)

5 Years

3Touch Panel (Backlight)

7 Years

Usage 60000 hours

4UPS (Battery and Fan)

5 Years（Ambient Temp 20℃
2.5 Years（Ambient Temp 30℃）

(If required)

6Remarks

7. System Configuration■Overall Configuration
LegendTraffic Counter（TC）
Anemometer (AV)Visibility Index meter（VI）
Carbon monoxide meter（CO）

Measuring data obtained from measurement device

Electrical Room
Ventilation Measurement Control Panel

Input

Power panel(Inverter Type)

OutputTouch Panel (Display Operation)
TC processing unit
AV processing unit
VI processing unit
CO processing unit

DFSA※Inverter

Monitoring controlFireRemoteEmergency※DFSA
Noise filter for JF driving with general
purpose inverter developed by ourcompany

The values measured by measuring instruments like traffic counter (TC), Wind speed
meter (AV), and carbon monoxide (CO), Visibility index (VI) is sent to the respective
processing unit integrated into the ventilation control panel installed in electrical room.
Subsequently, the processed data is input into the PLC.
The values of the measuring instruments input into the PLC are displayed on the touch
panel. The internal processing calculates the JF operating quantity based on measured
value, which is then sent to the inverter to control the operation of the JF within thetunnel. Additionally, the values from the measuring instruments input into the PLC arefurther transmitted to remote control facilities and disaster prevention equipment.

78. Specifications Monitoring operations (Touch Panel)■

Hard copy of all Screen can be taken and can be printed！！

■

In single screen operation mode, Fire, Tunnel status can be monitored！！

■Easy-to-understand screen design with color-coded buttons！！

MonitoringOperation Mode
Fire Status
While monitoring thestatus of instruments andventilation equipmentinside the tunnel, you
can view the operating
mode and the status ofany potential fire.

Common Screen
Outputs a hard copy ofthe displayed screen to a
USB memory in bitmapformat.

■

During mode switches, a confirmation screen is displayed to prevent wrong operations.

■

Make operation easy by showing which buttons can be clicked and which cannot.

Mode Change
Press the mode switch button
and a pop-up will appear.
Mode Change screen

Display inactive buttons thatcannot be operated。

When you press the button tochange the mode, a confirmation
button will appear to confirm
the change.

8■Simple Operation History！！

Operation History
Display of past 3000
operation histories indescending order ofoccurrence of a dateand time.

■Low speed wind control can be observed in graph！！

Trend
Display graphs for JF's
number of operation andAV measurements values.
Wind speed reduction
control can be observedin same graph.

■ Keypad input for clear limits, preventing errors！！
Parameters related to measurements
devices AV, VI, CO.
When the numeric value is pressed, thenumeric keypad is displayed, and thenumeric keypad is used to set thevalue.

Parameter

Input values
within thedisplayed range on
the numeric
keypad and set
them using theWrite button.

99.Panel Specification① Warning Indicator Light② Touch Panel③ Operation Button① Warning Display light
Display warning with a red lamp indicator.
～Examples of warning light indicators～
Major failure, Minor failure, Door Open etc.
② Touch Panel
Displays and perform operations.
Screen displays the operating mode, fire status, status of measuring devices and ventilationequipment inside the tunnel, displaying the driving history, and configuring parameters.
～Examples～
Monitoring Status, Mode change, Failure History, Trend graph screens etc.
③ Operation Button
Convenient button operations on the panel are performed using push-button switches. When
turned on, they will be indicated in red.
～Examples～
Independent, Interlocking, Alarm return, Failure return, Lamp test etc.

10ItemContents

Target Tunnel

Two-way traffic tunnel

Ventilation Method

Longitudinal ventilation method

Front View

Specifications

Side View

Rear View

Dimensions

W800×H1800×D800mm

ModelIndoor Independent closed type

Electrical Type

Control circuit: Single phase 100V 50/60HzUsage conditions

Ambient temperature - 5 ~ 40 °C (24-hour average below 35 °C)
Altitude 1000m, Humidity 30～80%
Protection class is the general indoor class and is as follows.
Item
Door packing
Ventilation filter
JEM1267 IP code

Protection classSpecifications
NANA
IP20

The charging section protection for the internal panel and door-mounted
devices will be as follows: structures preventing direct contact or thosewith no danger below 24V, and exposed charging terminals within easyreach will have electric shock prevention measures like acrylic covers,terminal covers, caps, etc.

StructureIf it is made of steel plate, the plate thickness should be less than or equalto (Unit: mm).
Main Steel platethickness

Plate Type
Field
Operationalpanel(Self-standing)

Door

CellingSideFloor

3.2

2.3

2.3

2.3

・Post shaped support will be made of steel pipe.
・Post-shaped pillar foundation base will be made of 6mm steel plate.
Paint Color

Outside：5Y7/1 Inside：5Y7/1

Paint Gloss

Semi-gloss

Painting Specifications

Melamine baking coating

Film thickness

Outside：60μm

Inside：40μm

1110. Quality■PatentPatent No.4898732

Tunnel ventilation control system using jet fan in two-way traffic tunnel

Patent No.5335550

Ventilation control system for long distance road tunnel

Patent No.5300775

Induction electric motor with variable drive system for jet fans in roadtunnels driven through long cables■Quality Management
ISO 9001

Quality Management system Certified

ISO 27001 Information Security Management System
Certified
The Sohatsu Systems Laboratory Inc. establishes quality and information security policies andendeavors to achieve proper quality management by acquiring various management systems,
setting quality policies, and establishing information security policies.

■Factory Test
The test items during factory testing are shown below.
・Quantity Inspection
・Visual Structural Inspection
・Film thickness Inspection
・Dimensional Inspection
・Functional Performance
・Power supply inspection
・Insulation Resistance test
・Withstand Voltage test
・Functional Test
・Touch Panel Functional test
・Input/Output Signal test

12

11.Standard Drawings■Standard outline drawing

Side View

Front View

Rear View

Operation Switch

Front View

13

Website and Inquiry

http://www.sohatsu.com

Sohatsu Systems Laboratory Inc.
President, Ichiro Nakahori

・Head officeSannomiya Denden Bldg 3F A-2, 64 Naniwa-machi,
Chuo-ku,Kobe 650-0035 Japan
TEL：（078）325-3220 FAX：
（078）325-3221

・Factory
C-108, Kobe City Manufacturing Factory
1-2-25 Wadayamadori, Hyogo-ku, Kobe 652-0884 Japan

3-01-09 V001

14