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Image Controller & Inspection Equipment
- GS-610
- VG-4
- OS-20K
- TH-1400
- TH-1400PC
- TP-9854C


TH-1400

Optical fiber type which is detectable pinhole as small as diameter 20µm
Pinhole detector

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TH-1400

Overview

This pinhole detector optically detects pinhole appeared on opaque sheet substance made of such material as aluminum foil, copper foil, copper sheet, and steel sheet using fluorescent lamp and optical fiber in good accuracy.
Slight ray of fluorescent lamp light leaked from pinhole of sheet material is passed through optical
fiber and detected by high sensitive photomultiplier tube.
Pinhole of diameter 20µm can be detected surely.
Automatic edge tracing mechanism is equipped in TH-1400A type, therefore stabled detection is possible even sheet is snaked.

Features

Pinhole of diameter 20µm is surely detected in high speed line of 1,500m/min.
Detection sensitivity is not changed even line speed is changed.
Variation of detection sensitivity in sheet width direction is very small because pinhole is detected using optical fiber.
Dynamic range is very wide, therefore the device can respond to ten times diameter variation.

Applications

Detection signal waveform

Pinhole detection of :
Aluminum foil
Copper foil
Steel sheet
Rubber sheet
Other various opaque sheets

Detection principle

 
1. Slight ray of fluorescent lamp light leaked from pinhole of sheet is led to photomultiplier tube through optical fiber.
2. This slight light is amplified and converted into electric signal by photomultiplier tube and outputted.
3. This electric signal is processed in various ways and relay contact signal is outputted judging size of pinhole.
4. Connection to printer is also possible by option.

Dead zone at edge parts

Dead zone is 10mm at both edges in small snaking sheet.
Apply edge mask automatic tracing mechanism equipped type when snaking is more than ±5mm.

Specifications

Inspection accuracy / Objected substance
Type Opaque sheet state substance
Width 500 to 1,380mm
Thickness Less than 1.2mm
Driving speed Max 1,500m/min
Vertical vibration Less than ±1mm
Snaking Within ±2mm
Ambient
temperature
0ºC to +40ºC
Line state Continuous
Inspection area Whole area of sheet excluding
10mm dead zone at both edges
Inspection
accuracy
More than
ø20µm pinhole diameter
 
Light source
Light projecting
method
High frequency lighting method
(20KHz - 30KHz)
Light source White fluorescent lamp
Operation power
source
Supplied from inverter
Connection
method
Metal plug socket type
Setting distance Distance from objected substance: 40mm
Operating
temperature
0ºC to +40ºC
(Free from due condensation)
 
Receiver
Light receiving
method
Optical fiber light collecting method
Photoelectric
transducer
Photomultiplier tube
Light receiving
width range
Various types
Setting distance Distance from objected substance: 2mm
Operating
temperature
0ºC to +40ºC
(Free from due condensation)
Controller
Judgment
criteria setting
Setting of slice voltage (Judgment criteria) by digital switch.
Setting range is ten times of standard pinhole diameter.
Synchronizing Customer supplied inspection command (ON period of gA-contacth or gOpen collector signalh becomes inspection period.)
Display · Power display: LED (amber)
· Detection display: LED (red)
· Sheet breakage display: LED (orange)
· Inspecting display: LED (green)
· Display of total turning on time of electricity using hour meter
Output 1. Relay output (A-contact)
· Detection output (timer output)
ON time: 0.5sec}30%
· Detection dis
2. Electronic buzzer alarm (timer output)
· Operation time: About 1 sec (with ON and OFF switch)
Operation
power source
AC100V±10% 50/60Hz
Power
consumption
Approx. 300VA
Connection
method
Metal plug socket and
terminal block type
Operating
temperature
0ºC to +40ºC
(Free from due condensation)
 
Edge mask automatic tracing system
Moving speed Less than 4mm/sec
Open and close range 400 to 1,400mm
Setting accuracy Within ±1 mm
Operation panel Control by sequencer
Operating
temperature
0ºC to +40ºC
Outline Dimension
(mm)
800 (W) × 700 (H) × 250 (D)
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