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A capacitance sensor includes a switch control unit that performs a first switching process that turns on a first switch and then repeatedly performs a second switching process that complementarily switches off and on second and third switches that are respectively connected to second and third capacitors; an obtaining unit that calculates, as a sensor output value, a number of times the second switching process is repeated until a magnitude relationship reverses between an intermediate potential and a reference potential; a calculation unit that calculates a sensor output corrected value obtained by correcting the sensor output value such that a resolution becomes uniform; and a determination unit that determines whether a detection target exists from a magnitude relationship between a sensor output difference value and a determination threshold value.
A capacitance sensor includes a switch control unit that performs a first switching process that turns on a first switch and then repeatedly performs a second switching process that complementarily switches off and on second and third switches that are respectively connected to second and third capacitors; an obtaining unit that calculates, as a sensor output value, a number of times the second switching process is repeated until a magnitude relationship reverses between an intermediate potential and a reference potential; a calculation unit that calculates a sensor output corrected value obtained by correcting the sensor output value such that a resolution becomes uniform; and a determination unit that determines whether a detection target exists from a magnitude relationship between a sensor output difference value and a determination threshold value.
Capacitance sensor
KODA SATOSHI (author)
2023-07-11
Patent
Electronic Resource
English
IPC:
G01D
MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE
,
Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein
/
B60R
Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen
,
VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
/
E05F
DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION
,
Vorrichtungen zum Bewegen der Flügel in die Offen- oder Schließstellung
/
G01R
Messen elektrischer Größen
,
MEASURING ELECTRIC VARIABLES
/
H03K
PULSE TECHNIQUE
,
Impulstechnik
Injection molding method of capacitance sensor, Bluetooth capacitance sensor, handlebar and vehicle
| European Patent Office | 2023