Browse Prior Art Database

Sensor Control Method on Coin In/Out Auto Casher

IP.com Disclosure Number: IPCOM000116579D
Original Publication Date: 1995-Oct-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Nagayama, M: AUTHOR [+2]

Abstract

Disclosed is an optical sensor control method. Both sensor check mode and sensor power up mode are embedded in one sensor drive circuit.

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This is the abbreviated version, containing approximately 100% of the total text.

Sensor Control Method on Coin In/Out Auto Casher

      Disclosed is an optical sensor control method.  Both sensor
check mode and sensor power up mode are embedded in one sensor drive
circuit.

      The circuit is simple, but it has three functions --- sensor
check, sensor power-up and normal drive function --- for sensor
control.

      Fig. 1 shows configuration of sensor system.  In the normal
drive function, the transistor (TR-2) is off and transistor (TR-1) is
driven by pulse drive.  The digital sampling circuit samples sensor
data synchronized with pulse.  Fig. 2 shows function of digital
sampling.  Input signal is discretely but output signal is sequence.
The table shows rule for determination of output.

      In the sensor check function, the TR-1 is off and the TR-2 is
on.  The LED is driven by DC drive.  The current of LED is set to
half of normal drive function by resistor R2.  Software can detect
the near end of a sensor's life.

      In the power-up function, the TR-1 is driven pulse drive and
the TR-2 is on.  The current of LED is 1.5 times as large as Normal
mode.  It is possible to reactivate the sensor function that causes
malfunction when there is insufficient lighting power.

      This sensor circuit has sensor check, sampling, and power up
function.  These functions are useful for reliability, availability,
and serviceability of sensor.  The machine which has an optical
sensor
can be applied to this system.