WO2015137123A1 - Dispositif de détection et dispositif de séchage des mains - Google Patents

Dispositif de détection et dispositif de séchage des mains Download PDF

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Publication number
WO2015137123A1
WO2015137123A1 PCT/JP2015/055435 JP2015055435W WO2015137123A1 WO 2015137123 A1 WO2015137123 A1 WO 2015137123A1 JP 2015055435 W JP2015055435 W JP 2015055435W WO 2015137123 A1 WO2015137123 A1 WO 2015137123A1
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WIPO (PCT)
Prior art keywords
detection
hand
signal
processing unit
electrodes
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PCT/JP2015/055435
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English (en)
Japanese (ja)
Inventor
荒木　宏
関　真規人
亀石　圭司
繕弘 深谷
森　亮二
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to CN201580007150.8A priority Critical patent/CN105960187B/zh
Priority to JP2015537485A priority patent/JP5897225B2/ja
Publication of WO2015137123A1 publication Critical patent/WO2015137123A1/fr

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/48—Drying by means of hot air
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/088—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices operating with electric fields

Definitions

  • the present invention relates to a detection device that detects insertion of a dielectric (for example, a human hand) into an apparatus, and a hand drying device that includes the detection device.
  • a detection device that detects insertion of a dielectric (for example, a human hand) into an apparatus
  • a hand drying device that includes the detection device.
  • photoelectric sensors using light are the mainstream of hand detection devices installed in hand dryers (hand dryers). That is, the presence / absence of the hand is detected by detecting reflected light by the hand or blocking light by the hand using light.
  • the photoelectric sensor has a problem peculiar to the photoelectric sensor that the optical parts of the photoelectric sensor are vulnerable to contamination. Further, when the photoelectric sensor is embedded in mounting on the casing, there is a sanitary problem such that a step or a gap is formed, and dirt remains in the step or the gap and is difficult to clean.
  • Patent Document 1 A hand detection sensor of a photoelectric sensor is proposed in Patent Document 1.
  • a capacitive human body detection sensor has been proposed as a sanitary proximity sensor.
  • Patent Document 2 and Patent Document 3 disclose a sensor that detects a change in capacitance due to the approach of a human body and detects the human body from a signal determination unit.
  • the hand detection sensor of hand dryers is a photoelectric sensor that is optical, and requires a transparent material for the optical window.
  • the hand dryer is a device installed around the water, a seal structure that prevents water from entering also becomes an issue.
  • fitting is necessary in assembling the casing, and there is a sanitary problem that dirt easily remains in the fitting portion of the casing. Therefore, there is a need for a non-contact type hand detection sensor that can improve the hygiene by eliminating the deterioration of the hand detection capability due to contamination without using a transparent material, and reducing the number of cleanings.
  • An object of the present invention is to provide a hand detection device that detects a hand in a non-contact manner without providing an optical window in a casing, and a hand drying device using the same.
  • the hand drying device includes a blower that sends out air for drying hands, a plurality of conductive detection electrodes installed inside a casing so as to detect capacitance by the hand, and the plurality The detection processing unit that detects the position of the hand based on the capacitance detected by the detection electrode and determines that the hand has been inserted into the hand insertion unit, and the determination result of the detection processing unit And a control unit for controlling the operation of the blower unit.
  • the present invention without providing an optical window in the casing, it is possible to detect insertion and removal of the hand from the device by detecting the hand from the inside of the casing using a capacitance without contact.
  • FIG. 1 It is side surface sectional drawing which shows the hand-drying apparatus of Embodiment 1 which concerns on this invention.
  • (a) is a front view of the hand detection device viewed from the detection area of FIG. 1
  • (b) is a side view of the hand detection device
  • (c) is a bottom view of the hand detection device.
  • It is a flowchart which shows operation
  • A) is the front view seen from the detection area of the hand detection apparatus which concerns on the modification 1 of Embodiment 1
  • (b) is a side view of a hand detection apparatus.
  • (A) is the front view seen from the detection area of the hand detection apparatus which concerns on the modification 2 of Embodiment 1
  • (b) is a side view of a hand detection apparatus.
  • (A) is the front view seen from the detection area of the hand detection apparatus which concerns on the modification 3 of Embodiment 1
  • (b) is a side view of a hand detection apparatus. It is side surface sectional drawing which shows the hand-drying apparatus by Embodiment 2 which concerns on this invention.
  • (A) is the top view seen from the detection area of the hand detection apparatus of Embodiment 3
  • (b) is a front view of a hand detection apparatus
  • (c) is a side view of a hand detection apparatus.
  • (A) is the front view seen from the detection area of the hand detection apparatus which concerns on the modification 1 of Embodiment 3
  • (b) is a side view of a hand detection apparatus.
  • (A) is the front view seen from the detection area of the hand detection apparatus which concerns on the modification 2 of Embodiment 3
  • (b) is a side view of a hand detection apparatus.
  • It is a perspective view which shows the hand detection apparatus by Embodiment 4 which concerns on this invention.
  • It is a front view of the hand detection apparatus of FIG. (A) is the top view seen from the detection area of the hand detection apparatus of FIG. 11,
  • (b) is a front view of a hand detection apparatus,
  • (c) is a side view of a hand detection apparatus.
  • (A) is the top view seen from the detection area of the hand detection apparatus which concerns on the modification of Embodiment 4,
  • (b) is a front view of a hand detection apparatus,
  • (c) is a side view of a hand detection apparatus. It is. It is side surface sectional drawing which shows the hand-drying apparatus by Embodiment 6 which concerns on this invention.
  • FIG. 1 is a side sectional view showing the overall configuration of the hand drying device according to the first embodiment of the present invention.
  • the hand drying device 1 includes a casing 10, a hand detection device 2, a control unit 14, a blower unit 13, and shielding plates 16 and 16 ′.
  • the hand drying apparatus 1 is an apparatus for drying the hand 3 by applying dry air to the hand 3 wet with water after the user has washed the hand 3, for example.
  • the hand drying device 1 is generally installed and used on a wall surface, detects the user's hand 3 inserted in the detection area 4 of the hand detection device 2 from the side opposite to the wall side (person side), and blows the air blower 13. To dry the hands 3.
  • the casing 10 has a manual insertion portion 11 and air blowing nozzles 12 and 12 '.
  • the hand insertion portion 11 is formed in a concave shape on the surface of the casing 10 and includes a space in which the user can insert / remove the hand 3 from above.
  • the hand insertion unit 11 is further surrounded by a drain water channel that collects water scattered from the hand 3 and an air channel that takes in dry air.
  • the blower nozzles 12 and 12 ′ are provided above the hand insertion portion 11 and send air to the space of the hand insertion portion 11.
  • the hand detection device 2 is a capacitance type proximity sensor, and detects the approach of a dielectric such as the hand 3 and a conductor in the detection area 4.
  • the hand detection device 2 is installed on the inner wall (for example, on the wall side) of the casing 10 so that the detection area 4 overlaps the space surrounded by the hand insertion portion 11.
  • the hand detection device 2 may be disposed on the inner wall of the casing 10 on the person side.
  • the wall side is the side farther from the human body with respect to the hand extended for drying
  • the human side is the side closer to the human body with respect to the hand extended for drying.
  • FIG. 2 shows the configuration of the hand detection device 2.
  • FIG. 2 (a) is a front view of the hand detection device 2 viewed from the detection area 4, and
  • FIG. 2 (b) is a side view of the hand detection device 2.
  • FIG. 2C is a bottom view of the hand detection device 2.
  • the hand detection device 2 includes a circuit board 20, detection electrodes 22 and 24, a detection processing unit 26, and a connection unit 28.
  • the detection electrodes 22 and 24 are band-like conductive electrodes, and are installed in parallel on the circuit board 20.
  • the detection area 4 is formed in the front direction of the detection electrodes 22 and 24, and when the hand 3 approaches the detection electrodes 22 and 24, the capacitance detected by the detection electrodes 22 and 24 changes.
  • the detection electrodes 22 and 24 are configured by, for example, processing a strip-shaped metal plate into a three-dimensional U shape, and both ends are installed on the circuit board 20, whereby the detection electrodes 22 and 24 are placed on the surface of the circuit board 20. (See FIG. 2C).
  • the circuit board 20 is a board on which the detection electrodes 22 and 24 are mounted, and is composed of, for example, a copper clad laminated board.
  • the detection processing unit 26 and the connection unit 28 are arranged on the surface opposite to the surface where the detection electrodes 22 and 24 are installed.
  • a circuit ground is provided on the entire surface where the detection electrodes 22 and 24 are installed. The circuit ground suppresses unnecessary noise that can be received by the detection electrodes 22 and 24. For example, a mesh or a slit may be inserted in the circuit ground so as to reduce the heat capacity in consideration of soldering.
  • the detection processing unit 26 converts the capacitance detected by the detection electrodes 22 and 24 into voltage or current, and performs capacitance detection processing, angle detection signal processing, determination processing, and the like, which will be described later.
  • the detection processing unit 26 is installed on the surface opposite to the detection electrodes 22 and 24 on the circuit board 20. By installing the detection processing unit 26 on the surface opposite to the detection electrodes 22 and 24 on the circuit board 20, it is possible to suppress the influence of capacitance other than the detection electrodes 22 and 24 and external noise.
  • the detection processing unit 26 is composed of, for example, a CPU and an MPU, and realizes functions to be described later by executing a predetermined program.
  • the predetermined program may be realized by being incorporated in an electronic circuit inside the detection processing unit 26 or may be installed as software.
  • the detection processing unit 26 outputs outputs P1 and P2 as determination results of manual insertion / extraction.
  • the output P1 indicates the start of insertion / extraction of the hand 3, and the output P2 indicates that the insertion amount of
  • connection unit 28 is connected to the control unit 14 of the hand dryer 1 through the signal line 18, and outputs the determination result output from the detection processing unit 26 to the control unit 14.
  • the connection line type of the connection unit 28 includes a circuit power supply, a circuit ground, and output lines P1 and P2.
  • the connection line type of the connection unit 28 may further include a signal line for estimating the substrate temperature by a thermistor or the like installed on the circuit board 20.
  • the output line of the determination result by the detection processing unit 26 may be single, or may be two or more according to the determination value.
  • the hand detection device 2 is configured such that the detection electrodes 22 and 24 are disposed below the blow nozzles 12 and 12 ′ on the inner wall of the casing 10 and extend in the horizontal direction (left and right direction) of the hand insertion portion 11. Installed.
  • Each detection electrode 22, 24 uses the space of the hand insertion portion 11 as a detection area 4.
  • the detection electrode 22 is arranged so as to be able to measure a dielectric material having a height equal to or higher than that of the blowing nozzles 12, 12 ′, and thus the fingertip of the hand 3 can also be detected.
  • the detection electrode 24 is arranged below the detection electrode 22 so as to measure the capacitance variation due to the fingertip and the entire palm of the inserted hand 3, and the hand 3 is inserted into or removed from the hand insertion unit 11. Is reliably detected.
  • the control unit 14 of the hand drying device 1 controls the operation of the entire hand drying device 1 and controls the air blowing operation of the air blowing unit 13 based on the outputs P1 and P2 of the hand detection device 2 connected by the signal line 18. .
  • the control unit 14 is constituted by, for example, a CPU or MPU, and realizes its function by executing a predetermined program.
  • the predetermined program may be realized by being incorporated in an electronic circuit inside the control unit 14 or may be installed as software.
  • the blower unit 13 is a high-pressure airflow generator that blows dry air that dries the hands 3 from the blower nozzles 12 and 12 ′, and includes, for example, a blower motor.
  • the blower motor of the blower unit 13 can adopt any one as long as it forms dry air to dry wet hands, and can freely adjust the air volume by controlling the number of rotations. There may be.
  • the shielding plates 16 and 16 ′ are mainly made of conductive metal, and are affected by the electrostatic capacity of the person on the human side of the hand dryer 1 and the electrostatic capacity of the upper portion of the casing and the wall surface of the hand dryer 1 on the wall side. Reduce the effect of capacity. Inside the casing 10, the shielding plate 16 'is disposed on the person side, and the shielding plate 16 is disposed on the wall side. The shielding plates 16 and 16 ′ are electrically connected and are grounded to the circuit ground of the control unit 14 of the hand dryer 1.
  • the detection processing unit 26 continuously detects the position of the user's hand 3 inserted into the hand insertion unit 11 and determines that the hand 3 has been inserted into the hand insertion unit 11.
  • the control unit 14 causes the air blowing unit 13 to start the air blowing operation based on the determination result of the detection processing unit 26.
  • the detection processing unit 26 continuously detects the position of the hand 3 by calculating the insertion angle of the hand 3 based on the capacitance detected by the detection electrodes 22 and 24. That is, the detection processing unit 26 detects the continuous position of the hand 3.
  • FIG. 3 is a diagram illustrating temporal changes of various signals in the angle detection signal processing of the hand detection device 2.
  • FIG. 3 shows temporal changes of various signals in the hand detection device 2 particularly when the hand 3 is inserted and removed from the hand insertion portion 11 of the hand drying device 1.
  • FIG. 3A shows a detection signal x (t) indicating the capacitance detected by the detection electrode 22 at time t.
  • FIG. 3B shows a detection signal y (t) indicating the capacitance detected by the detection electrode 24 at time t.
  • FIG. 3C shows a signal obtained by superimposing the detection signals x (t) and y (t).
  • 3D to 3F show various signals generated by the detection processing unit 26 of the hand detection device 2 in angle signal processing described later. Specifically, FIG. 3D shows the sum signal ⁇ (t) of the detection signals x (t) and y (t).
  • FIG. 3E shows a difference signal ⁇ (t) between the detection signals x (t) and y (t).
  • FIG. 3F shows an angle signal ⁇ (t) as a result of signal processing of the angle signal processing.
  • the detection signal x (t) of the detection electrode 22 rises first, and then the detection signal y (t) of the detection electrode 24 rises. After the hand 3 is fully inserted, when the removal of the hand 3 is started at time t2, the detection signals x (t) and y (t) decrease accordingly.
  • the detection processing unit 26 performs the following angle detection signal processing on the inserted hand 3 based on the detection signals x (t) and y (t). Since the detection electrodes 22 and 24 form a pair in the vertical direction as shown in FIG. 2B, the angle detection signal processing detects an angle with respect to the hand 3 by applying monopulse signal processing known as radar signal processing. That is, in the detection area 4, the pair of upper and lower detection electrodes 22, 24 are treated as radar antennas, and pseudo monopulse signal processing is performed so that the insertion or removal of the hand 3 in the detection area 4 is determined by the insertion angle of the hand 3. I do.
  • monopulse signal processing known as radar signal processing
  • the detection processing unit 26 performs signal processing by superimposing two detection signals x (t) and y (t) in the angle detection signal processing.
  • the two signals to be superimposed have the same signal level in the radar angle measurement processing in the monopulse angle calculation.
  • the signal level of the detection electrode 24 is usually equal to or lower than the signal level of the detection electrode 22 due to the detection characteristics of the hand 3 inserted / removed. Therefore, an angle calculation process is performed by setting a gain ⁇ ( ⁇ ⁇ 1) that increases the signal output of the detection electrode 24.
  • the sum signal ⁇ (t) see FIG.
  • Atan (F ( ⁇ )) is an inverse function of tan ( ⁇ ).
  • the detection processing unit 26 generates an angle signal ⁇ (t) corresponding to insertion / extraction of the hand 3 according to the equations (1) to (3).
  • FIG. 3F shows the time change of the angle signal ⁇ (t) determined by the equation (3).
  • the insertion angle ⁇ of the hand 3 to the hand insertion portion 11 is an angle (elevation angle) of the hand 3 inserted from the front upper side of the hand detection device 2 as shown in FIG. That is, the elevation angle is based on a plane that passes through the midpoint of the detection electrodes 22 and 24 and is perpendicular to the circuit board 20.
  • the angle signal ⁇ (t) generated in the angle detection signal processing increases / decreases in accordance with the insertion angle when the hand 3 is inserted / removed from / to the hand insertion unit 11.
  • the angle direction of the insertion angle ⁇ is, for example, a positive direction from the normal direction of the detection electrodes 22 and 24 toward the detection electrode 22 and a negative direction toward the detection electrode 24, and an angle of 0 ° is a normal line of the detection electrodes 22 and 24. The direction.
  • the detection processing unit 26 compares the generated angle signal ⁇ (t) with the determination values ⁇ 1 to ⁇ 3 ( ⁇ 1> ⁇ 2> ⁇ 3).
  • the determination value ⁇ 1 is a determination value for determining the insertion start or removal completion of the hand 3.
  • the determination value ⁇ 2 is a determination value for determining the insertion amount of the hand 3.
  • the determination value ⁇ 3 is a determination value for determining an error such as excessive insertion of the hand 3, leaving an obstacle, or occurrence of a puddle.
  • the determination values ⁇ 1 to ⁇ 3 are set as follows, for example.
  • the determination value ⁇ 1 is set to an angle corresponding to the hand 3 above the blowing nozzle 12 in FIG.
  • the determination value ⁇ 2 is below the blowing nozzle 12 and the normal direction of the detection electrodes 22 and 24 shown in FIG. Is set to an angle corresponding to an angle of 0 ° or less.
  • the determination value ⁇ 3 is set to an angle corresponding to the lowermost detection area 4.
  • the angle signal ⁇ (t) decreases because the hand 3 is inserted from the upper part of the detection area 4.
  • the angle signal ⁇ (t) falls below the determination value ⁇ 1
  • the detection processing unit 26 causes the control unit 14 to drive the blowing unit 13 based on the outputs P1 and P2 and starts blowing.
  • the control unit 14 may simultaneously turn on LEDs and sound a buzzer.
  • the detection processing unit 26 causes the control unit 14 to stop blowing air based on the outputs P1 and P2. At the same time, the control unit 14 may stop turning off the LED, a buzzer, or the like as an end notification.
  • FIG. 4 is a flowchart showing the operation of the hand detection device 2 in the hand drying device 1.
  • the operation of the hand detection device 2 will be described using the flowchart of FIG.
  • the detection processing unit 26 of the hand detection device 2 performs memory clearing at the time of power activation, detects the capacitance of each of the detection electrodes 22 and 24, and detects the electrostatic capacitance.
  • An initialization process for removing noise with respect to the capacitance value is performed (step S101). Since the initialization process samples the capacitance in time series, it includes a noise removal process and an offset process.
  • the detection processing unit 26 performs a capacitance detection process on each of the detection electrodes 22 and 24 (step S102).
  • the detection signals x (t) and y (t) are generated at the noise levels LN and LN ′ even if the hand 3 is not inserted due to the influence of the external environment or the like. May be detected.
  • predetermined threshold values L and L 'larger than the noise levels LN and LN' may be provided in the detection signals x (t) and y (t) to prevent malfunction due to noise. Further, only one of the threshold values L and L ′ may be set.
  • the detection processing unit 26 diagnoses whether or not each capacitance detected by the detection signals x (t) and y (t) is normal (step S103).
  • the abnormality diagnosis of the capacitance for example, when the capacitance of the detection electrodes 22 and 24 exceeds a predetermined upper limit value, it is determined that the detection signals x (t) and y (t) are abnormal (in step S104). No) An abnormality is notified to the control unit 14 of the hand dryer 1 (step S105), and the operation of the hand detector 2 is finished.
  • the detection processing unit 26 notifies the abnormality by turning on the outputs P1 and P2 to the control unit 14, for example. In response to this, the control unit 14 notifies the display unit.
  • control unit 14 turns on an alarm LED (display unit) provided on the outer wall of the casing 10.
  • an alarm LED display unit
  • step S104 When the detection processing unit 26 determines that the detection signals x (t) and y (t) are normal (Yes in step S104), the following processing is performed based on the detection signals x (t) and y (t). Perform hand detection processing.
  • angle detection signal processing is performed on the inserted hand 3 (step S106).
  • the detection processing unit 26 In the angle detection signal processing in step S106, the detection processing unit 26 generates an angle signal ⁇ (t) corresponding to the insertion / removal of the hand 3 as shown in FIG. 3 according to the equations (1) to (3).
  • the detection processing unit 26 compares and determines the generated angle signal ⁇ (t) with the determination values ⁇ 1 to ⁇ 3 ( ⁇ 1> ⁇ 2> ⁇ 3).
  • the detection processing unit 26 first determines whether or not the angle signal ⁇ (t) is equal to or smaller than the determination value ⁇ 1, and when the angle signal ⁇ (t) is larger than the determination value ⁇ 1 (No in step S107), the detection processing unit 26 Outputs P1 and P2 to the control unit 14 of the hand dryer 1 are both turned off (step 108). Thereafter, the detection processing unit 26 returns to step 102 and performs the capacitance detection process again. When the outputs P1 and P2 are both off, the hand 3 is not inserted into the hand insertion portion 11.
  • the detection processing unit 26 proceeds to determination whether the angle signal ⁇ (t) is equal to or less than the determination value ⁇ 2.
  • the detection processing unit 26 turns on the output P1 to the control unit 14 and turns off the output P2 (step 110). Return to processing.
  • the output P1 is on and the output P2 is off, the hand 3 is inserted, but the amount of insertion is not sufficient.
  • the detection processing unit 26 further proceeds to determination whether the angle signal ⁇ (t) is equal to or less than the determination value ⁇ 3.
  • the detection processing unit 26 turns off the output P1 to the control unit 14 and turns on the output P2 (step 112). Return to processing.
  • the output P1 is off and the output P2 is on, the hand 3 is inserted with a sufficient insertion amount.
  • step S111 When the angle signal ⁇ (t) is equal to or smaller than the determination value ⁇ 3 (Yes in step S111), the detection processing unit 26 turns on the outputs P1 and P2 to the control unit 14 (step 113), and returns to the processing of step 102. .
  • the outputs P1 and P2 are both on, an error state such as excessive insertion of the hand 3, leaving an obstacle, or occurrence of a puddle is shown.
  • the control unit 14 drives the blower unit 13 when the output P1 is turned off and the output P2 is turned on. Start blowing.
  • the control unit 14 controls the blowing unit 13 to stop blowing.
  • the control unit 14 turns on an LED, for example, in order to notify the user of an abnormal situation.
  • control unit 14 of the hand drying apparatus 1 turns on the detection processing unit 26 in order to deal with cases where the fingertip is dried above the detection area 4 or when the drying air is maintained for a predetermined period even when the hand 3 is removed.
  • the blower 13 may be controlled after a predetermined delay period after receiving the output P1. At this time, the air blowing unit 13 determines that the fingertip is in the detection area 4 based on the output P1, and stops the air blowing unit 13 generating the dry air by extending a predetermined delay period.
  • the angle signal ⁇ (t) corresponding to the insertion / removal of the hand 3 is generated, and the angle signal ⁇ (t) is compared with the determination values ⁇ 1 to ⁇ 3, thereby determining the hand insertion unit 11 of the hand 3. Insertion into and removal from can be reliably detected.
  • the control unit 14 controls the air blowing unit 13 in accordance with the comparison results with the determination values ⁇ 1 to ⁇ 3, so that the air blowing unit against fluctuations in capacitance not caused by insertion / removal of the hand 3, such as water splashing. 13 malfunctions can be prevented.
  • the determination value ⁇ 3 is usually set to a value smaller than the insertion angle for the user to dry the hand 3, so that the determination when the hand 3 is inserted excessively or the detection area 4 is performed. It can also be used to prevent unnecessary angle detection, such as when an obstacle such as a cellular phone or a cloth is left or a puddle is formed.
  • the detection electrodes 22 and 24 that detect the insertion and removal of the hand 3 by the change in capacitance are arranged inside the casing 10, The detection area 4 with improved hygiene can be realized.
  • the capacitances of the detection electrodes 22 and 24 that change when the dielectric moves in the detection area 4 the insertion / extraction of the hand 3 in the hand insertion portion 11 can be detected.
  • the hand detection device 2 according to the first embodiment by performing angle detection signal processing that is pseudo monopulse signal processing on the detection signals x (t) and y (t) from the detection electrodes 22 and 24. The accuracy of detecting insertion / removal of the hand 3 in the hand insertion unit 11 can be improved.
  • the air blowing control of the air blowing unit 13 in the hand dryer 1 can be easily performed. Can be realized.
  • the pair of detection electrodes 22 and 24 of the hand detection device 2 according to Embodiment 1 is configured to be a plate-like conductor metal plate, but the detection device is not limited to this, and may be configured with linear electrodes. Alternatively, a conductor pattern plated inside the casing 10 may be used. Since the detection electrodes 22 and 24 are installed separately from the surface of the circuit board 20, the detection sensitivity of the detection electrodes 22 and 24 in the detection area 4 is improved.
  • the three-dimensional shape of the detection electrodes 22, 24 is not limited to the U-shape, and the detection sensitivity can be adjusted by changing the height, width, etc. of the conductor plate obtained by three-dimensionally processing the band-shaped metal plate, and the detection area 4 The detection sensitivity suitable for the range can be obtained. Further, the detection processing unit 26 may be on the surface of the detection electrodes 22 and 24 on the circuit board 20.
  • the shielding plates 16 and 16 ′ are arranged inside the casing 10, it is possible to suppress a change in capacitance due to a user's conductor and the like, and thereby it is possible to more accurately detect insertion / removal of the hand 3.
  • the shielding plates 16 and 16 ′ may not be electrically connected to each other, may be configured by plating the insulator casing 10, and have the same potential as the ground of the circuit board 20 of the hand detection device 2. It may be a potential.
  • the potential of the shielding plates 16 and 16 ' may be the circuit ground potential of the control unit 14 of the hand dryer 1, the ground ground potential, or may be electrically floating. Note that the shielding plates 16 and 16 ′ may be omitted if the external influence is small in the detection of the capacitance depending on the installation environment of the hand dryer 1 and the shape of the casing 10.
  • the amount of change in capacitance detected by the detection electrodes 22 and 24, that is, the differential value A signal may be used.
  • the detection signals x (t) and y (t) are current signals, but a signal that has been subjected to moving average processing or average processing may be used in consideration of fluctuations due to noise or the like.
  • the control unit 14 may regenerate an alarm prompting cleaning instead of lighting the LED.
  • the abnormality diagnosis of capacitance may be performed by diagnosing normality / abnormality depending on whether or not the capacitance of the detection electrodes 22 and 24 is within a predetermined range, or when a predetermined lower limit value is exceeded. You may diagnose it as abnormal.
  • the capacitance abnormality diagnosis may be performed on the capacitance of each of the detection electrodes 22 and 24, or may be performed on only one of them.
  • FIG. 5 show another configuration of the hand detection device.
  • the detection electrodes 22a and 24a are formed of thin electrode patterns.
  • the hand detection device 2a can be made smaller than the hand detection device 2 by the thin detection electrodes 22a and 24a.
  • the upper detection electrode 22b is configured with a band-like width smaller than that of the lower detection electrode 24b.
  • the sensitivity in the vertical direction in the detection area 4 of the hand detection device 2 can be adjusted by configuring the pair of upper and lower detection electrodes non-uniformly like the detection electrodes 22b and 24b.
  • the upper detection electrode 22b has a narrower width than the lower detection electrode 24b.
  • the upper detection electrode 22c has a wider width than the lower detection electrode 24c. May be.
  • FIG. The hand drying device according to the second embodiment is a device in which the detection sensitivity of the hand 3 in the hand insertion portion 11 is improved by the detection electrodes 22 and 24 of the first embodiment which are large and thin.
  • FIG. 7 is a side sectional view of the hand dryer 5 according to the second embodiment.
  • the hand drying device 5 according to the second embodiment is different from the first embodiment in that it includes hand detection devices 6 and 6 ′ instead of the hand detection device 2 in the hand drying device 1.
  • the hand detection device 2 of the first embodiment includes the two detection electrodes 22 and 24, the second embodiment includes the two hand detection devices 6 and 6 ′.
  • Each of the hand detection devices 6 and 6 ′ includes one detection electrode 62 and 62 ′.
  • Each independent hand detection device 6, 6 ′ is connected to the control unit 14 by a separate signal line 18, 18 ′.
  • the hand detection devices 6 and 6 ′ are installed facing each other with the hand insertion part 11 interposed therebetween.
  • the hand detection device 6 is installed below the detection area 4 than the hand detection device 6 '.
  • the independent detection electrodes 62 and 62 ′ have a larger area than the detection electrodes 22 and 24 of the first embodiment, and are configured by circuit patterns provided on the circuit board 20, respectively.
  • capacitance detection processing similar to that in the first embodiment is performed in each detection processing unit 26 of the hand detection devices 6 and 6 ′, while angle detection signal processing similar to that in the first embodiment is performed.
  • the determination process based on the determination values ⁇ 1 to ⁇ 3 is performed in the control unit 14 of the hand dryer 5. Since the hand detection devices 6 and 6 ′ each have a single detection electrode, the angle detection signal processing cannot be performed alone, but detection signals from the respective hand detection devices 6 and 6 ′ are output to the control unit 14. Thus, the control unit 14 can perform the same angle detection signal processing as in the first embodiment.
  • the hand detection device 2 of the first embodiment can be used by optimizing the detection area 4 when the space of the hand insertion part 11 is narrow, while the hand insertion part 11 is long in the vertical direction and the front-rear direction.
  • the detection sensitivity may be insufficient. Therefore, in the second embodiment, the separated hand detection devices 6 and 6 ′ are installed in the hand drying device 5. Thereby, the detection sensitivity of the detection area 4 can be improved and it can respond also to the space of the wide hand insertion part 11.
  • the hand detection devices 6 and 6 ′ are installed so as to be shifted in the front-rear direction (person side and wall side) and the vertical direction of the hand insertion portion 11, so that the user inserts the hand 3 obliquely from the person side to the wall side.
  • Angle detection signal processing suitable for the case can be performed.
  • the detection device 6 and 6 ′ of the second embodiment each have the detection processing unit 26, the detection device is not limited to this, and one of the detection processing units 26 is omitted and both the connection units 28 are shielded. You may connect with a line. Thereby, the cost by the detection process part 26 can be reduced. At this time, angle detection signal processing may be performed in the other detection processing unit 26 in the same manner as in the first embodiment.
  • the arrangement of the hand detection devices 6 and 6 ′ is not limited to that illustrated in FIG. 7.
  • the hand detection device 6 may be installed above the hand detection device 6 ′ in the hand insertion unit 11.
  • Embodiment 3 The hand detection device of the third embodiment has a configuration in which at least one of the detection electrodes 22 and 24 of the hand detection device 2 of the first embodiment is divided in the longitudinal direction.
  • FIG. 8 shows a configuration in which the detection electrode 22 arranged on the upper side of the hand detection device 2 of the first embodiment is divided in the longitudinal direction.
  • the angle ⁇ H in the left-right direction of the detection area 4 as shown in FIG. 8A can be detected.
  • Insertion / extraction can also be detected.
  • FIG. 9 shows a configuration in which the detection electrode 24 arranged on the lower side of the hand detection device 2 of the first embodiment is divided in the longitudinal direction.
  • the detection electrodes 73 and 74 can more reliably detect the insertion / removal of the hand 3 in the left-right direction below the detection area 4.
  • FIG. 10 shows a configuration in which the detection electrodes 22 and 24 arranged on both the upper side and the lower side of the hand detection device 2 of the first embodiment are divided in the longitudinal direction.
  • the hand detection device 7b has detection electrodes 71 to 74 arranged in four in the vertical and horizontal directions of the detection area 4, and with respect to a predetermined two of the detection electrodes 71 to 74, By performing the same angle detection signal processing as in the first embodiment, more various movements of the hand 3 can be detected.
  • the hand detection device of the third embodiment is arranged in the hand drying device 1 in the same manner as the hand detection device 2 of the first embodiment.
  • the hand detection device 7 in the hand drying device 1 installed on a wall surface or the like, when the user inserts the left and right hands 3 into the hand insertion portion 11, the hand detection device 7 is in the longitudinal direction of the hand detection devices 7, 7a, 7b.
  • the detection electrodes 71 to 74 arranged side by side also detect the movement of the left and right hands 3 in the left-right direction.
  • FIG. 11 is a perspective view illustrating the hand detection device according to the fourth embodiment.
  • FIG. 12 is a front view of the hand detection device 8. As shown in FIG. 12, a plurality of detection electrodes 81 to 89 arranged in a matrix are divided into two groups in the vertical direction and further divided into two groups in the horizontal direction, thereby obtaining four groups of detection electrodes in the vertical and horizontal directions. It is done. By separating the four groups by adding the detection signals to each of the four groups of detection electrodes, the same angle detection signal processing as in the third embodiment can be performed, and various movements of the hand 3 in the vertical and horizontal directions are detected. be able to.
  • the angle detection signal processing similar to that of the first embodiment is performed on each of the two detection electrodes 81 to 89, thereby combining the two detection electrodes. Up, down, left and right angle signals may be generated. Thereby, insertion / extraction of the left and right hands 3L and 3R can be individually determined.
  • the signal strength of the palm is obtained from the signal strengths indicating the capacitances of the left hand 3L and the right hand 3R. Also good.
  • the gravity center positions of the left hand 3L and the right hand 3R can be detected from the respective signal intensities, and insertion / extraction of the left hand 3L and the right hand 3R can be determined from the gravity center positions.
  • the detection electrodes are not limited to this, and a plurality of M rows ⁇ N columns (M and N are natural numbers) of detection electrodes are arranged in a matrix. You may install in the shape.
  • FIG. 14 the structure of the hand detection apparatus 8 of Embodiment 5 is shown.
  • each amplitude of detection signals detected by the detection electrodes 81 to 89 is used instead of pseudo monopulse signal processing.
  • Y ⁇ (Xn * Wn) / N (7)
  • the detection processing unit 26 calculates the output value Y by calculation according to the equation (7).
  • a predetermined determination value is provided for the output value Y in the same manner as the determination values ⁇ 1 to ⁇ 3 in the first embodiment, and a detection output exceeding the determination value is determined to be insertion of the hand 3, and a detection output that does not exceed the determination value It can be determined that the hand 3 has been removed.
  • the setting of the weight Wn is, for example, W1: W2: W3: W4: W5: W6: W7: in consideration of detection below the detection area 4, detection of insertion of the left and right hands 3, detection of fingertips (handtips), and the like.
  • W8: W9 1: 3: 1: 2: 1: 2: 3: 2: 3.
  • This setting may be changed in consideration of the sensitivity of the detection electrode.
  • a weighted determination value is set for each of the detection electrodes 81 to 89 to obtain a total sum of determination results, and a determination value is also provided for the number of detection electrodes 81 to 89 detected.
  • the insertion and removal of 3 may be determined.
  • a unique determination value is set for each of the detection electrodes 81 to 89, and a frequency exceeding a predetermined time determination value is output, and the weight Wn and the frequency obtained from each of the detection electrodes 81 to 89 are set.
  • the insertion / removal of the hand 3 may be determined by multiplying by performing the same weighting and calculating the entire output value Y ′ in the same manner as Expression (7).
  • the weighting of the detection signal may be controlled by changing the weight Wn so that the detection signal becomes a predetermined value when the hand 3 is inserted into the detection area 4.
  • Embodiment 6 FIG.
  • the hand dryer according to the sixth embodiment is obtained by changing the shape of the casing 10 according to the first embodiment.
  • FIG. 15 is a side sectional view of the hand dryer 9 according to the sixth embodiment.
  • the hand insertion portion 11 is not formed in a concave shape on the surface of the casing 10, and a predetermined range of the open space below the casing 10 becomes the hand insertion portion 11. This is different from the first embodiment.
  • the hand dryer 9 is used by being installed on a wall surface, for example. As another example, the hand dryer 9 is installed and used near the sink of the washstand.
  • the blower nozzle 12 provided in the casing 10 sends air to a space below the casing 10. That is, the hand drying device 9 according to the second embodiment is a device for drying the hand 3 inserted below the casing 10.
  • the detection processing unit 26 of the hand detection device 2 performs the same capacitance detection process as in the first embodiment.
  • the hand detection device 2 is installed such that the detection electrodes 22 and 24 are arranged on the inner wall of the casing 10 on the back side (wall side) from the blower nozzle 12, and the detection area of each detection electrode 22 and 24 is below the casing 10. Is done. Further, the detection electrode 22 is arranged so as to measure a dielectric on the front side (human side) equivalent to the blowing nozzle 12, whereby the fingertip of the hand 3 can also be detected. The detection electrode 24 is disposed behind the detection electrode 22 so as to measure the capacitance variation due to the fingertip and the entire palm of the inserted hand 3, and the hand 3 is inserted into or removed from the hand insertion portion 11. Detect it reliably.
  • the control unit 14 controls the air blowing operation of the air blowing unit 13 by performing the same angle detection signal processing as in the first embodiment and the determination processing based on the determination values ⁇ 1 to ⁇ 3.

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  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

La présente invention est pourvue des éléments suivants : une unité de soufflage d'air qui souffle de l'air pour sécher les mains ; une pluralité d'électrodes de détection conductrices installées sur le côté interne d'un boîtier de manière à détecter la capacité électrostatique des mains ; une unité de traitement de détection qui, sur la base de la capacité électrostatique détectée par la pluralité d'électrodes de détection, détecte en continu la position des mains et détermine que les mains ont été insérées ; et une unité de commande qui commande le mouvement de l'unité de soufflage d'air sur la base des résultats déterminés par l'unité de traitement de détection.
PCT/JP2015/055435 2014-03-11 2015-02-25 Dispositif de détection et dispositif de séchage des mains WO2015137123A1 (fr)

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JP2015537485A JP5897225B2 (ja) 2014-03-11 2015-02-25 検知装置および手乾燥装置

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JPWO2019012640A1 (ja) * 2017-07-13 2019-11-07 三菱電機株式会社 手乾燥装置
WO2024100899A1 (fr) * 2022-11-11 2024-05-16 日本たばこ産業株式会社 Inhalateur d'arôme de type sans combustion et capteur capacitif

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JP2012003554A (ja) * 2010-06-17 2012-01-05 Alps Electric Co Ltd 静電容量式近接センサ装置、及びそれを用いた入力装置
JP2012125375A (ja) * 2010-12-15 2012-07-05 Panasonic Corp 手乾燥装置
JP2013099396A (ja) * 2011-11-08 2013-05-23 Mitsubishi Electric Corp 手乾燥装置
JP2013101011A (ja) * 2011-11-08 2013-05-23 Mitsubishi Electric Corp 検知装置、検知方法およびこれを用いた手乾燥装置

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WO2018037554A1 (fr) * 2016-08-26 2018-03-01 三菱電機株式会社 Sèche-main
JPWO2018037554A1 (ja) * 2016-08-26 2018-11-15 三菱電機株式会社 手乾燥装置
CN109640765A (zh) * 2016-08-26 2019-04-16 三菱电机株式会社 手干燥装置
EP3505032A4 (fr) * 2016-08-26 2019-08-14 Mitsubishi Electric Corporation Sèche-main
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JPWO2019012640A1 (ja) * 2017-07-13 2019-11-07 三菱電機株式会社 手乾燥装置
WO2024100899A1 (fr) * 2022-11-11 2024-05-16 日本たばこ産業株式会社 Inhalateur d'arôme de type sans combustion et capteur capacitif

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CN105960187A (zh) 2016-09-21
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JPWO2015137123A1 (ja) 2017-04-06

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