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TH-1400
Optical fiber type which is detectable pinhole as small as diameter 20µm
Pinhole detector
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Click here for dimensional outline drawing. |
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Click here for detailed catalogue. |
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Overview |
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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. |
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Slight ray of fluorescent lamp light leaked from pinhole
of sheet material is passed through optical
fiber and detected by high sensitive photomultiplier tube. |
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Pinhole of diameter 20µm can be detected surely. |
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Automatic edge tracing mechanism is equipped in TH-1400A
type, therefore stabled detection is possible even sheet is snaked. |
Features |
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Pinhole of diameter 20µm is surely detected in
high speed line of 1,500m/min. |
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Detection sensitivity is not changed even line speed
is changed. |
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Variation of detection sensitivity in sheet width direction
is very small because pinhole is detected using optical fiber. |
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Dynamic range is very wide, therefore the device can
respond to ten times diameter variation. |
Applications |
Detection signal waveform |
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Pinhole detection of : |
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Aluminum foil |
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Copper foil |
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Steel sheet |
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Rubber sheet |
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Other various opaque sheets |
Detection principle |
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| 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 |
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Dead zone is 10mm at both edges in small snaking sheet. |
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Apply edge mask automatic tracing mechanism equipped
type when snaking is more than ±5mm. |
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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 |
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| 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) |
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| 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) |
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| 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-contacth or gOpen collector signalh becomes inspection period.) |
| Display |
· Power display: LED (amber)
· Detection
display: LED (red)
· Sheet breakage display: LED (orange)
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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) |
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| 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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