JP2010163111A - Air flow adjusting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air flow adjusting device detecting movements of a palm of a user performed by the user with respect to a blowout port of an air conditioning device of a vehicle, by a simple structure and a processing, and adjusting the blown out air flow. <P>SOLUTION: This air flow adjusting device is provided with: a detecting part 2 for outputting detection signals according to the movements of the palm 9 performed close to the blowout port 82 of the air conditioning device 8 of the vehicle; a control part 3 for detecting a specific movement of the palm 9 by measuring the continuous time and repetition intervals of the detection signals and adjusting the air flow corresponding to the movement; and a notifying means 4 for notifying the user of the air flow and the adjustment result using sound or a light signal. The detecting part 2 is provided with a sensor 20 for detecting the movement of the palm 9, and uses a reflection type photoelectric conversion sensor, an electrostatic capacity sensor or the like, as the sensor 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air volume adjustment device for an air conditioner provided in a vehicle, and more specifically, adjusts an air volume from an air outlet by detecting a user's palm action with respect to the air outlet of the air conditioner. The present invention relates to an air volume adjusting device.

In automobiles, equipment and devices such as air conditioning devices, audio devices, and navigation systems are increasing, and their functions are becoming more sophisticated. Along with this, a large number of knobs and operation buttons for adjusting the operation of each device will be arranged, and when the user tries to operate any device, direct the line of sight to the position of the operation button, In reality, it is necessary to visually check the display and scale. For this reason, if the user is a driver, it is difficult to perform an intended operation during driving, and turning the line of sight away from the traveling direction leads to side-by-side driving.
Conventionally, in order to enable the user to operate various devices while looking forward while driving, the operation information is recognized by detecting the user's hand gestures, etc. Techniques for inputting operations are known. For example, there is a non-contact information input device that detects a user's hand using an imaging unit and operates and adjusts an in-vehicle device according to instruction information indicated by the shape of the hand (see Patent Document 1).

Japanese Patent Laid-Open No. 2005-50177

The knobs and operation buttons for adjusting the operation of the in-vehicle devices / devices cannot be made small so that they can be operated easily by humans, and a large number of operation buttons corresponding to various devices must be provided. What must be done is a design constraint. Further, as described above, there is a problem that it is difficult for the user to operate each device unless he / she visually recognizes the position and display of the operation buttons and the like.
Furthermore, since there are many cases where an operation using an operation button or the like does not give an image of the operation of the apparatus, there is a problem that the user cannot intuitively perform an intended operation. It is desirable that the operation method of the in-vehicle device is such that the user can intuitively imagine the operation by the operation such that the seat moves forward when the operation lever of the seat is slid forward. However, for example, push buttons and rotary knobs are used to adjust the air volume of many air conditioners, and there are many cases where the operation and the operation of the device are not linked on the user's image. .

Also, conventionally, an input device that can operate the device based on an instruction indicated by a hand gesture or the like by recognizing a user's hand shake or the like, such as the non-contact information input device has been proposed. . According to these, it is not necessary to visually recognize the operation part of various apparatuses, and the driver can operate without diverting his line of sight from the front. However, there is a problem that the instruction operation method for each device is not intuitively linked to the function and operation of the device itself. In addition, the operation instruction needs to be realized by a simple configuration and processing.
Among the operations of the in-vehicle device, the adjustment of the air volume from the air conditioner is an operation that is frequently performed. Therefore, it is desirable that the user can easily recall the operation location and the operation method. It is easy to understand if the adjustment of the air volume can be instructed toward the wind outlet. In addition, when a person feels hot, it is naturally observed that the wind is blown out with a palm or a fan, and when the wind is avoided, the hand is directed toward the wind to stop the wind.

  The present invention provides an air volume adjusting device capable of detecting a user's operation with a simple configuration and processing, and adjusting the amount of air blown from the air adjusting device of the vehicle, paying attention to the natural characteristics of the person. For the purpose.

The present invention is as follows.
1. An air volume adjusting device that adjusts an air volume from an air outlet of a vehicle air conditioner by an operation of a palm of a user, and outputs a detection signal corresponding to the operation of the palm in the vicinity of the air outlet A control unit that detects a specific movement of the palm by measuring a duration and a repetition interval of the detection signal and adjusts the air volume in response to the movement; and An air volume adjusting device comprising: an informing means for informing a user using an optical signal.
2. When the duration and the repetition interval are within a predetermined range, the control unit determines that the specific operation is one of the specific operations, and increases or decreases the air volume. The air volume adjusting device as described.
3. The control unit determines that the ratio is one of the specific operations when the ratio of the duration to the repetition interval is within a predetermined range, and increases or decreases the air volume. Or 2. The air volume adjusting device described in 1.
4). The control unit increases the air volume corresponding to the number of repetitions of the detection signal. To 3. The air volume adjusting device according to any one of the above.
5). The control unit increases the air volume according to the repetition speed of the detection signal. To 3. The air volume adjusting device according to any one of the above.
6). When the duration exceeds a predetermined time, the control unit determines that the specific operation is another one of the specific operations, and reduces the air volume. To 5. The air volume adjusting device according to any one of the above.
7). The control unit reduces the air volume according to the length of the duration. The air volume adjusting device as described.
8). The controller determines the specific operation by measuring the duration and the repetition interval again after a predetermined number of repetitions or a predetermined duration of the detection signal, and increases or decreases the air volume. To 7. The air volume adjusting device according to any one of the above.
9. The detection unit includes a light emitting element and a light receiving element, and detects the change in the amount of light emitted from the light emitting element and reflected by the palm. To 8. The air volume adjusting device according to any one of the above.
10. The detection unit includes an infrared sensor, and detects a change in the amount of infrared radiation emitted from the palm and received by the infrared sensor. To 8. The air volume adjusting device according to any one of the above.
11. The detection unit includes a capacitance sensor, and the capacitance sensor detects a change in capacitance due to the palm. To 8. The air volume adjusting device according to any one of the above.
12 The detection unit includes an imaging unit, and the control unit measures the duration and the repetition interval based on an image acquired by the imaging unit. To 8. The air volume adjusting device according to any one of the above.

According to the air volume adjusting device of the present invention, a detection unit that outputs a detection signal corresponding to a user's palm movement, and a specific movement of the palm is detected by measuring a duration and a repetition interval of the detection signal. In addition, since it has a control unit that adjusts the air volume in response to the operation, it detects the natural operation of the user by holding the palm close to the air outlet of the air conditioning device and stopping the wind with a simple configuration However, it can be adjusted to the air volume intended by the user. The driver can adjust the air volume while keeping his line of sight forward, and the vehicle does not need to be provided with an operation button or the like for adjusting the air volume. Furthermore, since the notification means by an acoustic or optical signal is provided, the user can know the air volume and the adjustment result without diverting his gaze from the front.
When the duration and the repetition interval are within a predetermined range, it is determined as one of the specific operations, and if the air volume is increased or decreased, noise and accidental signals can be removed, and the user flies with his / her palm. Such an operation can be detected reliably and the air volume can be adjusted.
In addition, when the ratio of the duration to the repetition interval is within a predetermined range, it is determined as one of the specific operations, and if the air volume is increased / decreased, an operation in which the user repeatedly flicks with a palm is reliably detected The air volume can be adjusted.

If the air volume is increased corresponding to the number of repetitions of the detection signal, the air volume can be adjusted step by step according to the number of times the user plays with the palm.
In addition, if the air volume is increased corresponding to the repetition speed of the detection signal, the air volume can be adjusted according to the speed at which the user repeatedly flicks with his / her palm, and the air volume adjustment that matches the user's natural feeling Is possible.
When the duration exceeds a predetermined time, it is determined as another one of the specific actions, and if the air volume is reduced, a natural action is performed such that the user stops the wind by stopping the palm close to the outlet. By detecting, the air volume can be reduced or the blowing can be stopped.
Further, if the air volume is reduced corresponding to the duration of the duration, the air volume can be reduced to a desired level or the air can be stopped depending on the length of the user's operation to stop.
After repeating the detection signal a predetermined number of times or after a predetermined continuation, the specific operation is determined by measuring the duration and the repetition interval again, and if the air volume is increased or decreased, an accidental signal or user Therefore, the influence of the irregular movement due to can be removed, and a specific movement of the palm can be reliably detected to adjust the air volume.

The detection unit includes a light emitting element and a light receiving element. If a change in the amount of light emitted from the light emitting element and reflected by the palm is detected by the light receiving element, the operation of the palm is stably detected with a simple circuit configuration. be able to.
Further, the detection unit includes an infrared sensor, and the power consumption of the detection unit can be reduced by detecting a change in the amount of infrared radiation emitted from the palm and received by the infrared sensor.
In addition, the detection unit includes a capacitance sensor, and if the capacitance change due to the palm is detected by the capacitance sensor, the capacitance changes depending on the distance between the sensor and the human body. Can be detected stably.
In addition, the detection unit includes an imaging unit, and the control unit reliably detects a specific action of the palm by simple image processing if the duration and the repetition interval are measured from the image acquired by the imaging unit. It becomes possible to do.

  The air outlet of the vehicle air conditioner is disposed at various locations so as to blow air to the upper body and feet of the user who sits on the driver's seat, passenger seat, rear seat, and the like. The air volume adjusting device of the present invention makes it possible to adjust the blown air volume by detecting the action of the hand of the user with respect to these outlets. For this reason, this air volume adjustment device is designed to produce wind by fanning a palm like a fan when a person feels hot (fan action) and by pushing the palm toward the wind to avoid wind. The operation (stopping operation) for stopping the air flow is detected as a basic operation, and the air volume is adjusted based on the detected operation.

(Configuration of air volume adjustment device)
As shown in FIG. 1, the air volume adjusting device 1 of the present invention is configured around a control unit 3 and includes a detection unit 2 and a notification unit 4. The control unit 3 is connected to the detection unit 2 and the blower 81 of the air conditioner 8. Air is sent out from the outlet 82 by the blower 81. The air volume adjusting device 1 can be provided corresponding to each outlet provided in the air adjusting device 8. Necessary electric power can be supplied to each part of the air volume adjusting device 1 by a power supply circuit (not shown) that receives power from the vehicle battery.

The detection unit 2 is configured to detect the palm 9 of the user that is brought close to the outlet 82 and to output a detection signal corresponding to the movement of the palm 9 to the control unit 3.
The control unit 3 is an electronic control unit (ECU), detects a specific operation of the palm 9 based on the detection signal from the detection unit 2, and sends a signal for adjusting the air volume corresponding to the operation to the blower 81. The control unit 3 is provided with time measuring means for measuring the duration for which the detection signal is on and the interval at which the repeated detection signal is on, thereby extracting characteristics of temporal changes in the detection signal. Configured. However, the measurement of the repetition interval includes the case where the detection signal remains on and there is no repetition.
The processing function of the control unit 3 may be realized by either hardware or software, and is preferably a microcontroller (microcomputer) including a CPU, memory (ROM, RAM, etc.), timer or counter, input / output circuit, and the like. ) With a peripheral circuit such as an input / output interface. A digital signal processor (DSP), programmable logic circuit, gate array, or other logic circuit may be used.

  The notification means 4 is a means for notifying the user of the operation state of the air volume adjusting device 1 and the adjustment result of the air volume using an acoustic or optical signal. By appropriately providing a sounding device, a display (light emitting diode, etc.), etc., it is possible to notify the user by sounding or lighting when detecting palm movement or changing the air volume. Moreover, it can comprise so that the alerting | reporting means 4 may be provided with the audio | voice output means which produces | generates an audio | voice using a speaker.

The detection unit 2 is configured to detect the movement of the user's palm 9 brought close to the outlet 82 from the duct of the air conditioner 8. For this reason, the detection unit 2 includes a sensor 20 for detecting the movement of the nearby palm 9.
The sensor 20 may detect a range (detection area 7) in the vicinity of the outlet 82 (for example, about several centimeters to 20 cm from the position of the outlet 82). Moreover, the sensor 20 should just be provided in the position which is easy to detect the motion of the palm extended toward the blowing outlet 82. FIG. Preferably, as shown in FIG. 3, it can be disposed around the outer surface of the outlet 82, but is not limited thereto.
As described above, the basic motion of the palm detected by the sensor 20 is a fan motion (for example, FIG. 3A) in which the palm is fanned with respect to the air outlet 82, and the palm is stationary toward the air outlet 82. Such a stopping operation (for example, FIG. 3B) can be used. As shown in FIG. 2, the direction of the fan motion is roughly the motion of waving a palm in the x direction (perspective direction) perpendicular to the outlet 82, the direction in the yz plane parallel to the outlet 82 ( There may be an action of shaking the palm in the vertical and horizontal directions. The sensor 20 only needs to be able to detect temporal changes in the amount of light, capacitance, and the like according to the movement of the palm in the detection area 7.

As an example of the sensor 20, a reflection type photoelectric sensor including a light emitting element 21 and a light receiving element 22 as shown in FIG. For example, a light emitting diode that emits light in the infrared region can be used as the light emitting element 21, and a phototransistor that receives light in the infrared region can be used as the light receiving element 22. Infrared light emitted from the light emitting element 21 is reflected by the palm 9 and received by the light receiving element 22. Since the amount of received light changes depending on the position and orientation of the palm 9, the movement of the palm 9 can be detected by the change in the amount of received light. The light emitting element 21 and the light receiving element 22 may be provided with an optical lens so as to optimize the detection area 7, and an optical filter for blocking visible light is provided on the light receiving element 22 so as not to be affected by disturbance light. You may prepare.
Using the light emitting element 21 and the light receiving element 22, the detection unit 2 can be configured as shown in FIG. 5, for example. The light emitting element 21 is driven by the pulse signal generated by the transmission circuit 211 via the transmission circuit 212, and an infrared pulse signal is emitted from the light emitting element 21. Reflected light from the palm or the like is received by the light receiving element 22 and subjected to photoelectric conversion. The output current of the light receiving element 22 is converted into a voltage signal by the receiving circuit 221 and amplified, and compared with a predetermined threshold value by the comparison circuit 222. Then, the synchronization circuit 223 synchronizes with the transmission pulse, and the filter circuit 224 removes noise and shapes the waveform to output the detection signal D.

  As the sensor 20, a passive infrared sensor may be provided. The passive infrared sensor can detect the movement of the palm based on the change in the amount of received light by receiving the infrared ray emitted from the palm 9 by the light detecting element without using the light emitting element as described above. Examples of the light detection element include a thermopile, a bolometer, and a photodiode.

  In addition, a capacitance sensor can be employed as the sensor 20. The capacitance sensor detects the capacitance between the ground and the vehicle body, and can easily and stably detect a change in capacitance due to a human body having a large relative dielectric constant. Since the capacitance value changes in accordance with the distance between the electrode of the capacitance sensor and the human body, ie, the palm 9, and the facing area, the movement of the palm 9 close to the outlet 82 is detected as a change in capacitance. be able to.

  Further, the detection unit 2 may be provided with imaging means. If an infrared camera, for example, is used as the imaging means, the movement of the palm 9 can be acquired as image information without being affected by the brightness of the surrounding environment. Since only the detection area 7 near the outlet 82 is imaged by the camera and the palm 9 is extracted, and the temporal change in the position of the palm 9 may be detected, the image processing can be simplified.

(Operation of air volume adjustment device)
FIG. 3 is a diagram illustrating a state in which the sensor 20 is provided above the air outlet 82 of the air conditioner 8 and the user's palm (9a, 9b) is inserted in front of the air outlet 82. For example, when the sensor 20 is the reflective photoelectric sensor, light is radiated to the detection area 7 centered on the optical axis of the light emitting element, and reflected light from the object in the detection area 7 is approximately received by the light receiving element. Light can be received. If the palm 9 is on the optical axis close to the outlet 82, the amount of received light is large, and the amount of received light is small when the palm 9 is off or away from the optical axis. Therefore, when the palm 9a is swung as shown in FIG. 3A, the amount of received light varies according to the movement. Further, as shown in FIG. 5B, when the palm 9b is stationary, the amount of light received during that time does not vary greatly.

FIG. 6 illustrates an example of the operation of the air volume adjusting device 1 when the fan 9 is fanned, and the horizontal axis of the graph is time. When the fan 9 performs a fanning operation, the detection level (amount of received light, capacitance, etc.) by the sensor 20 changes according to the operation. The detection signal D shown in FIG. 6B can be generated by comparing the detection unit 2 with a predetermined threshold L1.
The detection signal D is turned on when the palm 9 is sensed. When the fan operation is performed, the detection signal D is repeatedly turned on and off (D ₁ , D ₂ , D ₃ ,...). A period in which the detection signal D is on is a duration Tb, and an interval at which the detection signal D is on is a repetition interval Ta.
The control unit 3 can detect the fan motion that is the basic motion of the palm 9 from the duration Tb and the repetition interval Ta. Usually, since the speed of the fan operation is not uniform, the duration Tb and the repetition interval Ta are different each time it is repeated. In addition to noise, it is necessary to exclude signals that are accidentally generated by the user or other factors. For this reason, for example, when the duration Tb and the repetition interval Ta are in a predetermined range (for example, Tb is 0.05 seconds or more, Ta is 0.2 seconds to 1 second), it is determined that the fan operation is performed. Can do.
Further, the fan operation may be determined when the ratio of the duration Tb to the repetition interval Ta is within a predetermined range. Further, the determination condition for the fan operation may be that the duration Tb, the repetition interval Ta, and the ratio are all within a predetermined range.
In addition, the detection of the fan motion can be performed by various algorithms.

When the fan 9 is detected as described above, the control unit 3 controls the air volume from the outlet 82 to be increased. The air volume can be increased or decreased by outputting an air volume switching signal or the like from the control unit 3 to the blower 81.
Various algorithms for increasing the airflow can also be devised.
For example, the air volume can be increased in accordance with the number of repetitions of the detection signal D, that is, the number of repetitions of the fan action by the palm 9. Further, the air volume can be increased in accordance with the short repetition interval Ta of the detection signal D, that is, the speed of the fan operation by the palm 9.
In any case, in order to eliminate the influence of accidental signals, the air volume may not be changed until the fan operation is repeated a predetermined number of times. In that case, after the detection signal D is repeated a predetermined number of times, the air volume may be increased when the fan operation is determined by measuring the duration Tb and the repetition interval Ta again. For example, FIG. 6C shows a case where the initial two detection signals D ₁ and D ₂ are invalid, the air volume is increased by one step with the subsequent detection signal D ₃ , and further increased by one step with D ₄ .

Next, FIG. 7 shows an example of the detection of the stopping operation, which is another basic operation by the palm 9, and the air volume control based on the detection.
In the state where the palm 9 is pushed out toward the outlet 82, the palm 9 continues to be detected by the sensor 20 during that time, so that the detection level exceeds the threshold value L1 and the detection signal D remains on. . Therefore, simply, when the duration Tb of the detection signal D exceeds a predetermined time, it is determined as a stop operation, and the air volume can be reduced. Further, the air volume may be reduced corresponding to the length of the duration time Tb.
Similarly to the above, it is possible to add a process for removing the influence of a signal or the like that is accidentally caused by the user or other factors. For example, FIG. 7 (c) shows that the air volume is not changed until the on state continues for a predetermined time (Tm) after the detection signal D is turned on, and thereafter, every time duration Tc of the detection signal D. Shows the case where the air volume is reduced by one step.
In order to ensure the detection of the stopping operation, the usage method and the determination algorithm can be modified in various ways, such as determining that the palm 9 is stationary after the first fanning operation and then stopping the palm 9. .

FIG. 8 is a flowchart showing an outline of control for the operation example shown in FIGS. 6 and 7.
The air volume adjusting device 1 stands by from the initial state (S0) until the detection signal D is output by the detection unit 2 (S10).
After the detection signal D is turned on, the duration Tb and the repetition interval Ta are measured in order to see the temporal change (S20). Then, it is determined whether the duration Tb and the repetition interval Ta are within a predetermined reference range (S25).
When the duration Tb and the repetition interval Ta are within a predetermined range, it is confirmed that the detection signal D within the predetermined range has been repeatedly generated a predetermined number of times in order to reliably detect the fan operation ( S30).
When the detection signal D within the predetermined range occurs a predetermined number of times, control by the fan operation (S40 to S55) is started. In the control by the fan operation, the duration Tb and the repetition interval Ta are again measured (S40), and it is confirmed whether they are within a predetermined range (S45). If it is out of the predetermined range, it is determined that the fan operation has been stopped, and the process returns to the initial state (S0).
In step S45, if it is within the predetermined range, the blower 81 is controlled to increase the air volume by one step (S55). At that time, the notification means 4 can notify the user that the air volume is increased (S50).
Furthermore, by repeating the above processes (S40, S45, S55), the air volume can be increased sequentially in accordance with the number of fan operation repetitions.

In step S25, when the duration Tb and the repetition interval Ta are not within the predetermined range, and therefore there is no possibility of the fan operation, the detection signal D is continuously turned on for the predetermined time (Tm). If it is not continuously on, it is considered that the signal is caused by noise or an accidental factor, and the process returns to the initial state (S0).
If it is continuously in the on state, there is a possibility that it is a stop operation, so control by the stop operation (S70 to S85) is started. In the control by the stopping operation, if the detection signal D continues to be on for a certain time (Tc) (S70), the blower 81 is controlled to reduce the air volume by one step (S85). At that time, the notification means 4 can notify the user that the air volume is to be reduced (S80).
Furthermore, by repeating the above processes (S70, S85), the air volume can be sequentially reduced according to the length of time during which the stopping operation is continued.

It is a block diagram which shows the structure of the air volume adjustment apparatus of this invention. It is a figure for demonstrating the fan operation of the palm detected by the air volume adjusting device of this invention. FIG. 5 is a schematic diagram for explaining detection of palm movements by providing a sensor of the air volume adjusting device of the present invention near the air outlet of the air conditioner. It is a schematic diagram for demonstrating the detection of a palm in case the detection part of the air volume adjusting device of this invention is equipped with a light emitting element and a light receiving element. It is a block diagram which shows the structural example of the detection part by a reflection type photoelectric sensor. It is a figure which shows the operation example in which the air volume adjusting device of this invention detects the fan operation by a palm, and adjusts the blowing air volume of an air conditioner. It is a figure which shows the operation example which the air volume adjusting device of this invention detects the control action by a palm, and adjusts the blowing air volume of an air conditioner. It is a flowchart which shows the example of control of the air volume adjustment apparatus of this invention.

  DESCRIPTION OF SYMBOLS 1; Air volume adjustment apparatus, 2; Detection part, 3: Control part, 4; Notification means, 8: Air adjustment apparatus, 9, 9a, 9b; Palm, 20; Sensor, 21: Light emitting element, 22: Light receiving element, 81 Blower, 82; outlet, D; detection signal, Ta; repetition interval, Tb; duration.

Claims (12)

An air volume adjusting device that adjusts an air volume from an air outlet of a vehicle air conditioner by an operation of a user's palm,
A detection unit that outputs a detection signal corresponding to the movement of the palm in close proximity to the outlet;
A control unit for detecting a specific movement of the palm by measuring a duration and a repetition interval of the detection signal, and adjusting the air volume in response to the movement;
Informing means for informing the user of the air volume or the adjustment result using an acoustic or optical signal;
An air volume adjusting device comprising:   The air volume adjustment device according to claim 1, wherein the control unit determines that the specific time is one of the specific operations when the duration and the repetition interval are within a predetermined range, and increases or decreases the air volume.   The air volume adjustment device according to claim 1, wherein the control unit determines that the ratio is one of the specific operations when a ratio of the duration time to the repetition interval is within a predetermined range, and increases or decreases the air volume.   The air volume adjusting device according to any one of claims 1 to 3, wherein the control unit increases the air volume in accordance with the number of repetitions of the detection signal.   The air volume adjusting device according to any one of claims 1 to 3, wherein the control unit increases the air volume in accordance with a repetition speed of the detection signal.   The air volume adjustment device according to any one of claims 1 to 5, wherein the control unit determines that the specific operation is another one when the duration exceeds a predetermined time, and reduces the air volume.   The air volume adjusting device according to claim 6, wherein the control unit reduces the air volume according to the length of the duration.   The control unit determines the specific operation by measuring the duration and the repetition interval again after a predetermined number of repetitions or a predetermined duration of the detection signal, and increases or decreases the air volume. The air volume adjusting device according to any one of 7.   The air volume adjusting device according to any one of claims 1 to 8, wherein the detection unit includes a light emitting element and a light receiving element, and the light receiving element detects a change in the amount of light emitted from the light emitting element and reflected by the palm.   The air volume adjustment device according to any one of claims 1 to 8, wherein the detection unit includes an infrared sensor, and detects a change in the amount of infrared radiation emitted from the palm and received by the infrared sensor.   The air volume adjusting device according to any one of claims 1 to 8, wherein the detection unit includes a capacitance sensor, and a change in capacitance due to the palm is detected by the capacitance sensor.   The air volume adjusting device according to any one of claims 1 to 8, wherein the detection unit includes an imaging unit, and the control unit measures the duration and the repetition interval based on an image acquired by the imaging unit.

Images