Ultrasonic sensor for detecting the dispensing of a product
First Claim
1. A vending machine comprising:
- a product storage area;
a vend mechanism to dispense a product from the product storage area;
a delivery chute to receive a product dispensed from the product storage area;
a control unit to operate the vend mechanism; and
a sensor system to sense a presence of an object in the delivery chute and to signal the presence to the control unit, wherein the sensor system includesa sound transmitter,a sound receiver,a circuit to receive a signal from the sound receiver, the circuit adapted to detect an amplitude of the received signal and to detect a phase of the received signal, wherein the circuit produces a signal in response to the received signal indicating the presence of the object in the delivery chute.
6 Assignments
0 Petitions
Accused Products
Abstract
A vending machine includes a vend sensor for detecting a completion of a vend operation. The vend sensor includes an electronic circuit connected to first and second sound elements positioned on opposing sides of a product delivery chute of the vending machine. The first sound element directs a sound beam across the product delivery chute where it is received by the second sound element. During a vend operation, a product container is guided to the product delivery chute to be dispensed to a consumer. As the container passes through the product delivery chute, the sound beam is interrupted, thereby signaling the completion of a vend operation. Each of the first and second sound elements is provided with a cone that focuses the sound beam so as to limit interruptions stemming from outside sound sources.
33 Citations
20 Claims
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1. A vending machine comprising:
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a product storage area; a vend mechanism to dispense a product from the product storage area; a delivery chute to receive a product dispensed from the product storage area; a control unit to operate the vend mechanism; and a sensor system to sense a presence of an object in the delivery chute and to signal the presence to the control unit, wherein the sensor system includes a sound transmitter, a sound receiver, a circuit to receive a signal from the sound receiver, the circuit adapted to detect an amplitude of the received signal and to detect a phase of the received signal, wherein the circuit produces a signal in response to the received signal indicating the presence of the object in the delivery chute. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of operating a vending machine, the method comprising:
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in a delivery chute of the vending machine, sending a sound beam from a sound transmitter to a sound receiver; detecting an amplitude of a signal from the sound receiver; detecting a phase of a signal from the sound receiver; and producing a signal indicating a presence of an object in the delivery chute in response to the signal from the sound receiver. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A sensor system to sense a presence of an object in a delivery chute of a vending machine, wherein the sensor system includes
a sound transmitter, a sound receiver, a circuit to receive a signal from the sound receiver, the circuit adapted to detect an amplitude of the received signal and to detect a phase of the received signal, wherein the circuit produces a signal in response to the received signal indicating the presence of the object in the delivery chute.
Specification