Object detecting apparatus for use in automobile
First Claim
1. An object detecting circuit for use in an automobile, comprising:
- an ultrasonic transmitting section, a receiving section, and a control device, said ultrasonic transmitting section including(i) a trigger circuit supplying a trigger signal,(ii) a transmission signal oscillation circuit responsive to said trigger signal for supplying an excitation signal of a predetermined frequency,(iii) a transmission signal amplifying circuit receiving said excitation signal for supplying an ultrasonic driver signal, and(iv) a transmitter receiving said ultrasonic driver signal and, in response, supplying ultrasonic acoustic energy;
said receiving section including(i) an ultrasonic transducer responsive to reflected ultrasonic acoustic energy for supplying a detected ultrasonic signal,(ii) an automatic gain control circuit responsive to said trigger signal for supplying a gain control signal,(iii) a temperature compensating circuit responsive to an ambient temperature for supplying a temperature compensation signal,(iv) an amplifying circuit receiving said detected ultrasonic signal and, responsive to said gain control signal and said temperature compensation signal, supplying an amplified detected signal, andsaid control device including(i) a filtering circuit receiving said amplified detected signal and supplying a filtered detected signal,(ii) an integrating circuit receiving said filtered detected signal for supplying a first time integrated signal,(iii) a summing-adding circuit receiving said first time integrated signal and responsive to a threshold control signal for supplying a second time integrated signal,(iv) a comparator receiving said filtered detected signal and said second time integrated signal and, in response, supplying a first logic signal,(v) a detection level control circuit responsive to said trigger signal for supplying said threshold control signal,(vi) a reference time generating circuit responsive to said trigger signal for supplying first through third time reference signals,(vii) a function control circuit responsive to said first through third time reference signals and to said first logic signal for supplying first through third function signals,(viii) a first function circuit responsive to said first function signal for supplying a first alerting signal,(ix) a second function circuit responsive to said second function signal for supplying a second alerting signal,(x) a third function circuit responsive to said third function signal for supplying a third alerting signal, and(xi) a first and second function deciding circuit responsive to said first and second altering signals for supplying a composite alerting signal.
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Accused Products
Abstract
An object detecting apparatus for use in automobile is disclosed, and the apparatus includes ultrasonic wave transmitting and receiving units installed at a certain interval. Internally, the apparatus is provided with a single circuit which is capable of performing a functing of maintaining the safety distance with the car following behind during the normal running of the automobile, a function of detecting objects appearing behind during a reverse driving, and a function of making an exact close parking by reverse advancing. The circuit is divided into three sections: and ultrasonic wave transmitting section, a reflected wave receiving section, and a control device.
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Citations
9 Claims
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1. An object detecting circuit for use in an automobile, comprising:
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an ultrasonic transmitting section, a receiving section, and a control device, said ultrasonic transmitting section including (i) a trigger circuit supplying a trigger signal, (ii) a transmission signal oscillation circuit responsive to said trigger signal for supplying an excitation signal of a predetermined frequency, (iii) a transmission signal amplifying circuit receiving said excitation signal for supplying an ultrasonic driver signal, and (iv) a transmitter receiving said ultrasonic driver signal and, in response, supplying ultrasonic acoustic energy; said receiving section including (i) an ultrasonic transducer responsive to reflected ultrasonic acoustic energy for supplying a detected ultrasonic signal, (ii) an automatic gain control circuit responsive to said trigger signal for supplying a gain control signal, (iii) a temperature compensating circuit responsive to an ambient temperature for supplying a temperature compensation signal, (iv) an amplifying circuit receiving said detected ultrasonic signal and, responsive to said gain control signal and said temperature compensation signal, supplying an amplified detected signal, and said control device including (i) a filtering circuit receiving said amplified detected signal and supplying a filtered detected signal, (ii) an integrating circuit receiving said filtered detected signal for supplying a first time integrated signal, (iii) a summing-adding circuit receiving said first time integrated signal and responsive to a threshold control signal for supplying a second time integrated signal, (iv) a comparator receiving said filtered detected signal and said second time integrated signal and, in response, supplying a first logic signal, (v) a detection level control circuit responsive to said trigger signal for supplying said threshold control signal, (vi) a reference time generating circuit responsive to said trigger signal for supplying first through third time reference signals, (vii) a function control circuit responsive to said first through third time reference signals and to said first logic signal for supplying first through third function signals, (viii) a first function circuit responsive to said first function signal for supplying a first alerting signal, (ix) a second function circuit responsive to said second function signal for supplying a second alerting signal, (x) a third function circuit responsive to said third function signal for supplying a third alerting signal, and (xi) a first and second function deciding circuit responsive to said first and second altering signals for supplying a composite alerting signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An object detecting circuit, comprising:
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an ultrasonic transmitting section, a receiving section and a control device, said ultrasonic transmitting section including (i) a trigger circuit supplying a trigger signal, (ii) a transmission signal oscillation circuit responsive to said trigger signal for supplying an excitation signal of a predetermined frequency, (iii) a transmission signal amplifying circuit responsive to said excitation signal for supplying an ultrasonic driver signal, and (iv) a transmitter responsive to said ultrasonic driver signal and, in response, supplying ultrasonic acoustic energy; said receiving section including (i) an ultrasonic transducer responsive to reflected ultrasonic acoustic energy for supplying a detected ultrasonic signal, (ii) an automatic gain control circuit responsive to said trigger signal for supplying a gain control signal, (iii) a temperature compensating circuit responsive to an ambient temperature for supplying a temperature compensation signal, (iv) an amplifying circuit responsive to said detected ultrasonic signal and said gain control signal and said temperature compensation signal, for supplying an amplified detected signal; and said control device including (i) a filtering circuit responsive to said amplified detected signal for supplying a filtered detected signal, (ii) an integrating circuit responsive to said filtered detected signal for supplying a first time integrated signal, (iii) a summing-adding circuit responsive to said first time integrated signal and to a threshold control signal for supplying a second time integrated signal, (iv) a comparator responsive to said filtered detected signal and said second time integrated signal for supplying a first logic signal, (v) a detection level control circuit responsive to said trigger signal for supplying said threshold control signal, (vi) a reference time generating circuit responsive to said trigger signal for supplying first through third time reference signals, (vii) a function control circuit responsive to said first through third time reference signals and to said first logic signal for supplying first through third function signals, (viii) a first function circuit responsive to said first function signal for supplying a first alerting signal, (ix) a second function circuit responsive to said second function signal for supplying a second alerting signal, (x) a third function circuit responsive to said third function signal for supplying a third alerting signal, and (xi) a first and second function deciding circuit responsive to said first and second altering signals for supplying a composite alerting signal.
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8. An object detecting circuit, comprising:
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ultrasonic transmitting means for radiating ultrasonic acoustic energy, receiving means for receiving reflected ultrasonic acoustic energy and control means for supplying a composite alerting signal in response to the received reflected ultrasonic energy, said ultrasonic transmitting means including (i) trigger means for supplying a trigger signal, (ii) oscillator means responsive to said trigger signal for supplying an excitation signal, (iii) emitter means responsive to said excitation signal for radiating the ultrasonic acoustic energy; said receiving means including (i) ultrasonic transducer means responsive to the reflected ultrasonic acoustic energy for supplying a detected ultrasonic signal, (ii) temperature compensating means responsive to an ambient temperature for supplying a temperature compensation signal, (iii) detector means responsive to said detected ultrasonic signal and said temperature compensation signal for supplying an amplified detected signal; and said control means including (i) integrating means responsive to said amplified detected signal for supplying a time integrated signal, (ii) comparator means responsive to said amplified detected signal and said time integrated signal for supplying a first logic signal, (iii) reference time generating means responsive to said trigger signal for supplying first and second time reference signals, (iv) function control means responsive to said first and second time reference signals and to said first logic signal for supplying first and second function signals, (v) first function means responsive to said first function signal for supplying a first alerting signal, (vi) a second function means responsive to said second function signal for supplying a second alerting signal, and (vii) function deciding means responsive to said first and second altering signals for supplying the composite alerting signal. - View Dependent Claims (9)
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Specification