Ultrasonic range finder
First Claim
1. An ultrasonic range finder comprising:
- a housing;
an ultrasonic transmitting and receiving unit positioned within the housing;
a signal processing circuit, which is mounted in the housing and is connected with the ultrasonic transmitting and receiving unit;
a group of operation buttons on the housing which includes at least a calibration button;
a display unit, for displaying the result of a distance measurement; and
,a calibration member which has a first end connected to the housing, wherein the calibration member is comprised of a plurality of telescoping members, which when fully extended, extend outwardly from the housing.
1 Assignment
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Accused Products
Abstract
The present invention is intended to provide an ultrasonic range finder to measure a distance quickly and precisely under different environments. The ultrasonic range finder comprises a casing, an ultrasonic transmitting/receiving unit, a signal processing circuit connected electrically with the ultrasonic transmitting/receiving unit in the casing, a group of operation buttons on the casing and a display unit. The ultrasonic range finder further comprises a calibration rod to provide a constant reference distance. The calibration rod includes a first end connected to the casing. The calibration rod further includes a second end extendable outwardly relative to the casing and a body between the first and the second ends. By measuring a propagation time of an ultrasonic signal within the constant reference distance an ultrasonic propagation speed can be determined quickly and precisely and thereby perform the distance measurement quickly and precisely without being affected by changes in the environment.
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Citations
15 Claims
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1. An ultrasonic range finder comprising:
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a housing; an ultrasonic transmitting and receiving unit positioned within the housing; a signal processing circuit, which is mounted in the housing and is connected with the ultrasonic transmitting and receiving unit; a group of operation buttons on the housing which includes at least a calibration button; a display unit, for displaying the result of a distance measurement; and
,a calibration member which has a first end connected to the housing, wherein the calibration member is comprised of a plurality of telescoping members, which when fully extended, extend outwardly from the housing.
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2. An ultrasonic range finder comprising:
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a housing having an ultrasonic transmitting and receiving unit electrically connected to a signal processing unit, the ultrasonic transmitting and receiving unit capable of transmitting and receiving an ultrasonic beam; a calibration member having; a first end mounted in the housing; a second end, wherein the second end is extendable in a direction that an ultrasonic transmitting and receiving unit transmits an ultrasonic relative to the housing; and
,a body between the first end and the second end. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10)
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11. An ultrasonic range finder comprising:
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a housing; an ultrasonic transmitting and receiving unit mounted within the housing; a control circuit connected to the ultrasonic transmitting and receiving unit; an extendable calibration member; an object target comprising a housing, an ultrasonic transmitting and receiving unit mounted in the object target housing and electrically connected to an object target control circuit, and an indicator electrically connected to the object target control circuit. - View Dependent Claims (12, 13, 14, 15)
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Specification