A battery capacity measuring device in accordance with the present invention has a fully-charged state detector (80e), a detected current integrator (80a), a divider (80b), and a corrector (80c) incorporated in a microcomputer (80). The fully-charged state detector detects that a battery is fully ch
A battery capacity measuring device in accordance with the present invention has a fully-charged state detector (80e), a detected current integrator (80a), a divider (80b), and a corrector (80c) incorporated in a microcomputer (80). The fully-charged state detector detects that a battery is fully charged. The detected current integrator integrates current values that are detected by a current sensor during a period from the instant the battery is fully charged to the instant it is fully charged next. The divider divides the integrated value of detected current values by the length of the period. The corrector corrects a detected current using the quotient provided by the divider as an offset. Furthermore, a remaining battery capacity calculating system comprises a voltage detecting unit (50), a current detecting unit (40), an index calculating unit, a control unit, and a calculating unit. The voltage detecting unit detects the voltage at the terminals of a battery. The current detecting unit detects a current flowing through the battery. The index calculating unit calculates the index of polarization in the battery according to the detected current. The control unit controls the output voltage of an alternator so that the index of polarization will remain within a predetermined range which permits limitation of the effect of polarization on the charged state of the battery. When the index of polarization remains within the predetermined range, the calculating unit calculates the remaining capacity of the battery according to the terminal voltage of the battery, that is, the open-circuit voltage of the battery.
대표청구항▼
A battery capacity measuring device in accordance with the present invention has a fully-charged state detector (80e), a detected current integrator (80a), a divider (80b), and a corrector (80c) incorporated in a microcomputer (80). The fully-charged state detector detects that a battery is fully ch
A battery capacity measuring device in accordance with the present invention has a fully-charged state detector (80e), a detected current integrator (80a), a divider (80b), and a corrector (80c) incorporated in a microcomputer (80). The fully-charged state detector detects that a battery is fully charged. The detected current integrator integrates current values that are detected by a current sensor during a period from the instant the battery is fully charged to the instant it is fully charged next. The divider divides the integrated value of detected current values by the length of the period. The corrector corrects a detected current using the quotient provided by the divider as an offset. Furthermore, a remaining battery capacity calculating system comprises a voltage detecting unit (50), a current detecting unit (40), an index calculating unit, a control unit, and a calculating unit. The voltage detecting unit detects the voltage at the terminals of a battery. The current detecting unit detects a current flowing through the battery. The index calculating unit calculates the index of polarization in the battery according to the detected current. The control unit controls the output voltage of an alternator so that the index of polarization will remain within a predetermined range which permits limitation of the effect of polarization on the charged state of the battery. When the index of polarization remains within the predetermined range, the calculating unit calculates the remaining capacity of the battery according to the terminal voltage of the battery, that is, the open-circuit voltage of the battery. k1*V1where k1is a constant which is a function of the system mechanics, and a combined force F1=FA1FV1,and said weight assembly is oscillated at a frequency f2,has a mass M2,an acceleration A2,a velocity V2,produces a force FA2given by M2*A2,a force FV2given by k2*V2where k2is a constant, and a combined force F2=FA2+FV2,said drive circuit arranged to drive said weight assembly such that f1is equal to f2and F2is equal to -F1. 5. The apparatus of claim 1, further comprising a centering means which prevents said weight from moving to either end of said linear slide. 6. The apparatus of claim 5, wherein said centering means comprises a position sensor arranged to produce an output which varies with the position of said weight, said drive circuit arranged to receive said position output and to provide said first drive signal such that said weight is prevented from moving to either end of said linear slide. 7. The apparatus of claim 6, wherein said position sensor comprises a linear variable differential transformer (LVDT). 8. The apparatus of claim 1, further comprising an accelerometer mounted to said machine frame and an interface circuit connected to said accelerometer such that said accelerometer produces an output of which varies with the vibration level of said frame. 9. An apparatus for reducing the vibration transferred to a machine frame by an oscillating tool assembly supported by said frame, said tool oscillating along a first axis, comprising: a machine frame, an oscillating tool assembly mounted to said frame which oscillates at a frequency f1,has a mass M1,an acceleration A1,a velocity V1,produces a force FA1given by M1*A1,a force FV1given by k1*V1where k1is a constant which is a function of the system mechanics, and a combined force F1=FA1FV1,said oscillating tool assembly oscillated with a voice coil responsive to a first drive signal, a linear sliding means mounted to said frame, a weight mounted on said sliding means, a voice coil assembly comprising a housing and an armature, said armature coupled to said weight and arranged to oscillate said weight on said sliding means along said first axis in response to a second drive signal, said weight, armature, and any other components which are coupled to and move with said weight comprising a weight assembly which is oscillated at a frequency f2,has a mass M2,an acceleration A2,a velocity V2,produces a force FA2given by M2*A2,a force FV2given by k2*V2where k2is a constant which is a function of the system mechanics, and a combined force F2=FA2FV2,and a drive circuit which provides said second drive signal and which receives a first input which is proportional to A1and a second input which is directly proportional to V1,said drive circuit arranged such that said second drive signal varies with said first and second inputs to drive said weight assembly such that f1is about equal to f2and F2is about equal to -F1and thereby reduce vibration induced in said frame by said oscillating tool, wherein said drive circuit's first input varies with said first drive signal. 10. The apparatus of claim 9, further comprising a centering means which prevents said weight from moving to either end of said linear slide. 11. The apparatus of claim 10, wherein said centering means comprises a position sensor arranged to produce an output which varies with the position of said weight, said drive circuit arranged to receive said position output and to provide said second drive signal such that said weight is prevented from moving to either end of said linear slide. 12. The apparatus of claim 11, wherein said position sensor comprises a linear variable differential transformer (LVDT). 13. The apparatus of claim 9, further comprising an accelerometer mounted to said frame and an interface circuit connected to said accelerometer such that said accelerometer produces an output which varies with the vibration level of said frame. 14. The apparatus of claim 9, wherein said linear sliding means moves with said weight and is supported with air bearings mounted to said machine frame. 15. An apparatus for reducing the vibration transferred to a machine frame by an oscillating tool assembly supported by said frame, said tool oscillating along a first axis, comprising: a machine frame, an oscillating tool assembly mounted to said frame which oscillates at a frequency f1,has a mass M1,an acceleration A1,a velocity V1,produces a force FA1given by M1*A1,a force FV1given by k1*V1where k1is a constant which is a function of the system mechanics, and a combined force F1=FA1+FV1,said oscillating tool assembly oscillated with a voice coil responsive to a first drive signal, a linear sliding means mounted to said frame, a weight mounted on said sliding means, a voice coil assembly comprising a housing and an armature, said armature coupled to said weight and arranged to oscillate said weight on said sliding means along said first axis in response to a second drive signal, said weight, armature, and any other components which are coupled to and move with said weight comprising a weight assembly which is oscillated at a frequency f2,has a mass M2,an acceleration A2,a velocity V2,produces a force FA2given by M2*A2,a force FV2given by k2*V2where k2is a constant which is a function of the system mechanics, and a combined force F2=FA2FV2,and a drive circuit which provides said second drive signal and which receives a first input which is proportional to A1and a second input which is directly proportional to V1,said drive circuit arranged such that said second drive signal varies with said first and second inputs to drive said weight assembly such that f1is about equal to f2and F2is about equal to -F1and thereby reduce vibration induced in said frame by said oscillating tool, wherein said oscillating tool assembly is arranged to machine spectacle lens blanks. 16. An apparatus for reducing the vibration transferred to a machine frame by an oscillating tool assembly supported by said frame, said tool oscillating along a first axis, comprising: a machine frame, an oscillating tool assembly mounted to said frame which oscillates at a frequency f1,has a mass M1,an acceleration A1,a velocity V1,produces a force FA1given by M1*A1,a force FV1given by k1*V1where k1is a constant which is a function of the system mechanics, and a combined force F1=FA1+FV1,said oscillating tool assembly oscillated with a voice coil responsive to a first drive signal, a linear sliding means mounted to said frame, a weight mounted on said sliding means, a voice coil assembly comprising a housing and an armature, said armature coupled to said weight and arranged to oscillate said weight on said sliding means along said first axis in response to a second drive signal, said weight, armature, and any other
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