KR20230153893A - Object proximity detection and indication wearable device - Google Patents

Abstract

In accordance with an embodiment of the present invention, an object proximity detection and display wearable device includes: a first ultrasonic sensor configured to output a first pulse signal and receive a first reflection signal; a second ultrasonic sensor configured to output a second pulse signal and receive a second reflection signal; a first vibration element matched with the first ultrasonic sensor and configured to generate a vibration signal in response to the first reflection signal; a second vibration element matched with the second ultrasonic sensor and configured to generate a vibration signal in response to the second reflection signal; and a signal processing unit configured to receive first sensor information from the first ultrasonic sensor, receive second sensor information from the second ultrasonic sensor, and generate a first vibration signal or a second vibration signal based on the first sensor information and the second sensor information, wherein the first sensor information refers to information comparing a time point of receiving the first reflection signal reflected by an external object from the first or second pulse signal, a time point of receiving the second reflection signal reflected by an external object from the first or second pulse signal, and a time point of transmitting the first or second pulse signal, wherein the signal processing unit generates the first or second vibration signal corresponding to the first or second ultrasonic sensor when a time difference between the time point of transmitting the first or second pulse signal and the time point of receiving the first or second reflection signal, which are derived from the first or second sensor information, is smaller than or equal to a predetermined reference time difference. Therefore, the present invention is capable of detecting a proximity risk of an object without having a blind spot.

Description

Object proximity detection and display wearable device {OBJECT PROXIMITY DETECTION AND INDICATION WEARABLE DEVICE}

The present invention relates to a wearable device, and more specifically to a wearable device for detecting and displaying object proximity.

Wearable safety device technology that alerts the visually impaired, hearing impaired, elderly, or ordinary pedestrians to the risk of accidents due to contact with objects close to their blind spots, such as the back of the head, during their daily lives can reduce the occurrence of accidents. Additionally, users of wearable devices can effectively respond to injuries or reduce the severity of injuries.

Wearable safety device technology allows an installed ultrasonic sensor to detect the risk of collision due to close contact with an object in advance and notify the user. However, in general, ultrasonic sensors detect well when the reflective surface of an object is arranged perpendicular to the direction of ultrasonic waves. Therefore, there is a problem in that the object cannot be properly detected when the object protrudes sharply or the reflective surface is inclined.

In the case of wearable safety devices, the user's life may be directly affected in the event of an accident caused by a protruding object. Accordingly, technology is being researched to detect the proximity of an object without blind spots and quickly notify the wearer.

The purpose of the present invention is to provide a wearable object proximity detection and display device that detects the danger of proximity to an object without blind spots based on the ultrasonic sensors themselves and their mutual signals.

An object proximity detection and display wearable device according to an embodiment of the present invention includes a first ultrasonic sensor configured to output a first pulse signal and receive a first reflected signal, and configured to output a second pulse signal and receive a second reflected signal. A second ultrasonic sensor, a first vibration element corresponding to the first ultrasonic sensor and configured to generate a vibration signal in response to a first reflection signal, a first vibration element corresponding to the second ultrasonic sensor and vibrating in response to the second reflection signal A second vibration element configured to generate a signal, receiving first sensor information from the first ultrasonic sensor, receiving second sensor information from the second ultrasonic sensor, the first sensor information and the second sensor information and a signal processing unit configured to generate the first vibration signal or the second vibration signal based on the first sensor information, wherein the first pulse signal or the second pulse signal is reflected by an external object. 1 refers to information comparing the reception time of a reflected signal and the transmission time of the first pulse signal or the second pulse signal, and the second sensor information refers to the information that the first pulse signal or the second pulse signal is transmitted by an external object. It refers to information comparing the reception time of the reflected second reflected signal and the transmission time of the first pulse signal or the second pulse signal, and the signal processor derives the information from the first sensor information or the second sensor information. When the time difference between the time of transmission of the first pulse signal or the second pulse signal and the time of reception of the first reflected signal or the second reflected signal is less than or equal to a predetermined reference time difference, the first ultrasonic sensor or It is a wearable object proximity detection and display device that generates the first vibration signal or the second vibration signal corresponding to the second ultrasonic sensor.

According to the present invention, the proximity risk of an object can be detected based on the echo detection signals of the ultrasonic sensors themselves and each other. Accordingly, a wearable device and method for detecting and displaying proximity to an object that can detect proximity hazards of an object without blind spots are provided.

1 is a block diagram for explaining a wearable device for detecting and displaying proximity to an object according to an embodiment of the present disclosure.
FIG. 2 is a diagram showing some examples of operations of a wearable device according to an embodiment of the present disclosure.
FIG. 3 is a diagram showing the internal structure of the vibration element module of FIG. 2.
FIG. 4 is a diagram for explaining an operation of detecting the distance of an approaching object through the wearable device of FIG. 2.
FIG. 5 is a graph for explaining the operation of the wearable device of FIG. 2.
FIG. 6 is a diagram showing some examples of wearable device operations according to an embodiment of the present disclosure.
FIG. 7 is a graph for explaining the operation of the wearable device of FIG. 6.
FIG. 8 is a graph for explaining the operation of the wearable device of FIG. 6.
FIG. 9 is a diagram showing some examples of wearable device operations according to an embodiment of the present disclosure.
FIG. 10 is a diagram showing some examples of operations of a wearable device according to an embodiment of the present disclosure.
FIG. 11 is a diagram illustrating an operation of the wearable device of FIG. 10 to detect the distance of an approaching object.
FIG. 12 is a graph for explaining the operation of the wearable device of FIG. 10.
Figure 13 is a diagram showing a wearable device according to an embodiment of the present disclosure.
FIG. 14 is a diagram showing some examples of wearable device operations according to an embodiment of the present disclosure.
FIG. 15 is a diagram showing some examples of operations of a wearable device according to an embodiment of the present disclosure.
Figure 16 is a structural diagram of the wearable device according to an embodiment of the present disclosure as viewed from the top surface and a side cross-section along line A-A'.
Figure 17 is a structural diagram of the wearable device according to an embodiment of the present disclosure as seen from the top surface and a side cross-section along line A-A'.
Figure 18 is a structural diagram of the wearable device according to an embodiment of the present disclosure as seen from the top surface and a side cross-section along line A-A'.
Figure 19 is a graph showing the types of vibration signal patterns that can be displayed by a vibration element according to an embodiment of the present disclosure.
20 is a flowchart of a method for detecting and displaying proximity to an object according to an embodiment of the present disclosure.

Hereinafter, embodiments of the present disclosure will be described with reference to the attached drawings in order to explain in detail enough to enable those skilled in the art of the present disclosure to easily practice the technical idea of the present disclosure. .

1 is a block diagram for explaining a wearable device for detecting and displaying proximity to an object according to an embodiment of the present disclosure. Referring to FIG. 1, the object proximity detection and display wearable device 100 may include an ultrasonic sensor unit 110, a vibration element unit 120, a signal processing unit 130, and an energy storage device 140. .

The ultrasonic sensor unit 110 may include first to nth ultrasonic sensors 111 to 11n. The first to nth ultrasonic sensors 111 to 11n may transmit ultrasonic pulse signals with a specific frequency. The first to nth ultrasonic sensors 111 to 11n may receive ultrasonic pulse signals reflected from objects close to the wearable device.

The vibration element unit 120 may include first to mth vibration elements (121 to 12m). Each of the first to mth vibration elements 121 to 12m corresponds one-to-one to each of the first to nth ultrasonic sensors 111 to 11n. For example, vibration element 1 (121) corresponds to ultrasonic sensor 1 (111).

The signal processing unit 130 receives sensor information from the ultrasonic sensor unit 110. The signal processing unit 130 can recognize the risk of a short-distance contact accident through calculations on the input sensor information. For example, the signal processing unit 130 may display a vibration signal from a vibration element corresponding to an ultrasonic sensor for which a contact accident risk is recognized among the first to mth vibration elements 121 to 12m.

The energy storage device 140 can supply power to the ultrasonic sensor unit 110, the vibration element unit 120, and the signal processing unit 130. The energy storage device 140 may be a secondary battery that is charged after being used for a certain period of time.

FIG. 2 is a diagram showing the wearable object proximity detection and display device of FIG. 1. In the embodiment of FIG. 2, the object proximity detection and display wearable device 100 may be implemented in the form of a neckband.

Referring to FIGS. 1 and 2 , the first to nth ultrasonic sensors 111 to 11n may emit a short envelope signal having an ultrasonic signal of a certain period or more. Signals emitted by the first to nth ultrasonic sensors 111 to 11n may be reflected by the object OB. The first to nth ultrasonic sensors 111 to 11n may receive signals reflected by the object OB.

The signal processing unit 130 may obtain the distance d from the object OB. The distance (d) to the object (OB) is calculated by multiplying the round-trip travel time information obtained from the emission and reception signals of the first to nth ultrasonic sensors (111 to 11n) by the speed of sound ( For example, it can be calculated through Time of Flight (ToF). The method of calculating the distance d to the object is described in more detail below with reference to FIGS. 4 and 11.

The vibration element unit 120 may display a vibration signal. For example, when an object OB is close to the user of the wearable device 100, an ultrasonic sensor in the direction of the object OB (e.g., the first ultrasonic sensor) among the first to nth ultrasonic sensors 111 to 11n (111)) can receive the signal reflected by the object OB. The first to nth ultrasonic sensors 111 to 11n may transmit sensor information to the signal processing unit 130. According to the received sensor information, the signal processing unit 130 includes a vibration element (e.g., a first vibration element) arranged to correspond to an ultrasonic sensor (e.g., the first ultrasonic sensor 111) in the direction of the object OB. (121)) can display a vibration signal. Accordingly, the user of the wearable device can recognize the proximity and direction of the object OB.

FIG. 3 is a diagram showing the internal structure of the vibration element unit 120 of FIGS. 1 and 2. Referring to FIG. 2, the vibration element unit 120 includes first to mth vibration elements (121 to 12m), a frame (12a), a cavity (12b), a vibration membrane (12c), and a protruding structure (12d). can do.

The first to mth vibration elements (121 to 12m) may be arranged to correspond one-to-one with the first to nth ultrasonic sensors (111 to 11n). Accordingly, only the vibration element corresponding to the ultrasonic sensor to which the object approaches can display a vibration signal. Accordingly, the user of the wearable device 100 can determine in which direction the object is located.

Frame 12a may include a hard material. The frame 12a may use the frame of the wearable device 100 itself, and may be manufactured separately from the wearable device 100 and then assembled or attached.

The cavity 12b may be formed inside the frame 12a. The vibrating membrane 12c may be adhered to the surface of the pupil 12b.

The vibration membrane 12c may include a soft and elastic material. For example, the vibration membrane 12c may be implemented using rubber or elastic fibers such as silicone, polydimethylsiloxane (PDMS), polymer resin (Ecoflex), elastic material (elastomer), or urethane.

Each of the first to mth vibrating elements 121 to 12m may be attached to the vibrating membrane 12c so as to vibrate within the pupil 12b.

For example, the first to mth vibration elements (121 to 12 m) may include vibration actuator elements such as an eccentric rotary mass (ERM), linear resonant actuator (LRA), or piezo actuator.

The protruding structure 12d may be adhered to the outside of the vibrating membrane 12c. The protruding structure 12d may be disposed to correspond to the first to mth vibration elements 121 to 12m, respectively.

FIG. 4 is a diagram for explaining an operation of detecting the distance of an approaching object through the wearable device of FIG. 2. Referring to FIGS. 1 and 4 , for example, the first ultrasonic sensor 111 of the wearable device 100 may output an ultrasonic signal having a pulse signal in the form of a short envelope signal. The ultrasonic signal output from the first ultrasonic sensor 111 may be reflected by the object OB. The first ultrasonic sensor 111 can receive a signal reflected by an object. The signal processing unit 130 can convert the distance d11 to the object. The signal processing unit 130 can convert the distance (d11) by multiplying the time difference (t11) between the transmitted signal and the received signal by the speed of the ultrasonic wave and dividing it in half. The first vibration element 121 corresponding to the first ultrasonic sensor 111 may display a vibration signal when the distance converted by the signal processing unit 130 approaches the danger distance.

FIG. 5 is a graph for explaining the operation of the wearable device of FIG. 2. In the graph of Figure 5, the horizontal axis represents time, and the vertical axis represents the amplitude of the signal.

Referring to FIGS. 1, 2, and 5, for example, the first to nth ultrasonic sensors 111 to 11n may sequentially transmit ultrasonic pulse signals S1 to Sn. The ultrasonic pulse signal radiated from the first ultrasonic sensor 111 and reflected by the object OB and returned may be received by the first ultrasonic sensor 111. The signal processing unit 130 can detect the distance to the object OB by multiplying the time difference (t11) obtained by subtracting the transmission time of the emitted ultrasonic waves from the reception time of the received ultrasonic waves by the speed of sound. For example, in the case of the second ultrasonic sensor 112, which is not an ultrasonic sensor close to the object OB, the signals received from itself and each other may be very weak or may be displayed as no signal is displayed.

FIG. 6 is a diagram showing some examples of wearable device operations according to an embodiment of the present disclosure. Referring to FIG. 6 , an embodiment in which the reflective surface of the object OB is wider than that of FIG. 2 will be described. Referring to FIG. 6, all ultrasonic signals emitted from the first to nth ultrasonic sensors 111 to 11n may be reflected by the object OB. Signals reflected by the object OB may return to each of the ultrasonic sensors 111 to 11n that transmitted the ultrasonic signal. All of the vibration elements 121 to 12m corresponding to the ultrasonic sensors 111 to 11n that received the reflected signals may display vibration signals. Accordingly, the user of the wearable device 100 can detect the object OB. By using the positions and patterns of the vibrating elements, the user of the wearable device 100 can recognize not only direction information of nearby objects but also the size of the reflective surface.

FIG. 7 is a graph for explaining the operation of the wearable device of FIG. 6. In the graph of FIG. 7, the horizontal axis represents time, and the vertical axis represents the amplitude of the signal.

Referring to FIGS. 1, 6, and 7, ultrasonic sensors 111 to 11n can transmit and receive ultrasonic pulse signals in a time division manner. For example, the first to nth ultrasonic sensors 111 to 11n may sequentially emit ultrasonic pulse signals S1 to Sn of the same frequency f1 at a constant time interval t0. Accordingly, signals can be emitted and received without signal interference between ultrasonic sensors. Signals emitted from the first to nth ultrasonic sensors 111 to 11n may be reflected from the reflective surface of the object OB. The first to nth ultrasonic sensors 111 to 11n may receive signals reflected by the object OB and returned to the ultrasonic sensor. The signal processing unit 130 may detect the distance to the object using a value (t11 to tnn) obtained by subtracting the time at which the ultrasonic pulse signal is transmitted from the time at which the reflected ultrasonic pulse signal is received.

FIG. 8 is a graph for explaining the operation of the wearable device of FIG. 6. In the graph of FIG. 8, the horizontal axis represents time, and the vertical axis represents the amplitude of the signal.

Referring to FIGS. 1, 6, and 8, the first to nth ultrasonic sensors 111 to 11n may emit ultrasonic pulse signals S1 to Sn in a frequency division manner. Accordingly, signals can be emitted and received without signal interference between ultrasonic sensors. For example, ultrasonic pulse signals with different frequencies (f1 to fn) can be simultaneously emitted at regular time intervals (t0). Signals S1 to Sn emitted from the first to nth ultrasonic sensors 111 to 11n may be reflected from the reflective surface of the object OB. The first to nth ultrasonic sensors 111 to 11n may receive signals reflected by the object OB and returned to the ultrasonic sensor. The signal processing unit 130 may detect the distance to the object using a value (t11 to tnn) obtained by subtracting the time at which the ultrasonic pulse signal is transmitted from the time at which the reflected ultrasonic pulse signal is received.

FIG. 9 is a diagram showing some examples of wearable device operations according to an embodiment of the present disclosure. Referring to FIG. 9, an object OB with a sharply protruding structure may approach the blind spot between ultrasonic sensors. Accordingly, the ultrasonic waves transmitted by the first to nth ultrasonic sensors 111 to 11n may be reflected by the object OB and may not return to the ultrasonic sensors. That is, the user of the wearable device 100 may not be able to recognize the object OB approaching from the blind spot.

For example, if the object (OB) has a sharply protruding structure, blind spots may increase. To narrow the range of blind spots, more ultrasonic sensors can be used, but there are problems with increased power consumption and increased costs.

FIG. 10 is a diagram showing some examples of operations of a wearable device according to an embodiment of the present disclosure. Referring to FIG. 10 , an object OB with a sharply protruding structure may be closer to the wearable device 100 than in FIG. 9 . For example, a pulse signal emitted from the first ultrasonic sensor 111 may be reflected to the side of the object OB. The signal reflected from the side of the object OB may be received by the second ultrasonic sensor 112, which is different from the first ultrasonic sensor 111. In this case, the vibration signal can be displayed in the second vibration element 122 corresponding to the second ultrasonic sensor 112 that received the reflected signal.

In an embodiment of the present disclosure, by detecting objects based on echo signals between ultrasonic sensors, blind spots in object detection can be reduced without increasing the number of ultrasonic sensors.

FIG. 11 is a conceptual diagram illustrating a situation in which the wearable device of FIG. 10 detects the distance of an approaching object. Referring to FIGS. 1 and 11 , the second ultrasonic sensor 112 may receive a pulse signal emitted from the first ultrasonic sensor 111 to detect the object OB. The signal processing unit 130 can convert the distance d12 to the object OB. The signal processing unit 130 may use a method of converting the distance (d12) information by multiplying the value (t12) obtained by subtracting the emission point from the reception point of the pulse signal by the speed of the ultrasonic waves and dividing by half. The signal processing unit 130 may derive the distance d12 by considering the arrangement of the first to nth ultrasonic sensors.

In an embodiment of the present disclosure, a signal received by an ultrasonic sensor may be a case where a signal emitted by another ultrasonic sensor is reflected by a nearby object and returned. In this case, the wearable device may display a vibration signal with a different vibration pattern than when the signal it transmits is reflected and received by an object.

FIG. 12 is a graph for explaining the operation of the wearable device of FIG. 10. In the graph of FIG. 11, the horizontal axis represents time, and the vertical axis represents the amplitude of the signal.

Referring to FIGS. 1, 10, and 12, ultrasonic pulse signals S1 to Sn may be emitted in a time division manner by the first to nth ultrasonic sensors 111 to 11n. In this case, the emitted ultrasonic signal S1 may be reflected by the object OB and received by the second ultrasonic sensor 112, which is different from the first ultrasonic sensor 111 that emitted the ultrasonic signal S1. The signal processing unit 130 controls the time at which the ultrasonic signal is emitted and received between the first ultrasonic sensor 111, which emits the ultrasonic signal S1, and the second ultrasonic sensor 112, which receives the signal reflected by the object. The distance between the ultrasonic sensor S2 (112) and the object (OB) can be detected using the difference (t12).

Figure 13 is a diagram showing a wearable device according to an embodiment of the present disclosure. In the embodiment of FIG. 13, the object detection and display wearable device 200 may be implemented in the form of a wearable hard hat. Referring to FIG. 13, the wearable device 200 may include first to nth ultrasonic sensors 211 to 21n. The first to nth ultrasonic sensors 211 to 21n may be used by being disposed in the left and right blind spots centered on the back of the head and in the blind spots of the crown of the head. In addition, the number, arrangement structure, and spacing of ultrasonic sensors can be changed in consideration of power consumption and working environment.

Figure 14 shows some examples of wearable device operations according to an embodiment of the present disclosure. Referring to FIG. 14, an object OB having a sharply protruding structure may approach the blind spot of the first to nth ultrasonic sensors 211 to 21n. In this case, the signal emitted by the first to nth ultrasonic sensors 211 to 21n may be dispersed to the side of the object OB and may not return to the first to nth ultrasonic sensors 211 to 21n.

Figure 15 shows some examples of wearable device operations according to an embodiment of the present disclosure. Although the object OB has a protruding structure, it may be located closer to the wearable device 200 than in FIG. 14 . In this case, the pulse signal emitted by the first ultrasonic sensor 211 may be reflected laterally by the object. The reflected ultrasonic signal may be received by the second ultrasonic sensor 212, which is different from the first ultrasonic sensor 211 that emitted the ultrasonic signal.

According to an embodiment of the present disclosure, in the case of a wearable safety helmet, unlike a neckband, ultrasonic sensors are distributed on a three-dimensional curved surface. Accordingly, blind spots in the up, down, left and right directions can be reduced compared to the neckband.

Figure 16 is a structural diagram of the wearable device according to an embodiment of the present disclosure as viewed from the top surface and a side cross-section along line A-A'. Referring to FIG. 16, the wearable device 200 includes first to nth ultrasonic sensors (211 to 21n), first to mth vibration elements (221 to 22m), a fixing member 240, and a head protection strap ( 201), it may include a support 202 and a buffer member 203.

The first to mth vibration elements 221 to 22m may be arranged in one-to-one correspondence with each of the first to nth ultrasonic sensors 211 to 21n. The first to mth vibration elements (221 to 22m) may be disposed on the head protection line (201). The head protection line 201 can be fixed on the wearable device 200 through the support 202. The buffer member 203 is fixed inside the wearable device 200 and can absorb shock inside the wearable device 200. The vibrating elements (221-22m) may be fixed to the head protection line (201) by a fixing member (240).

Figure 17 is a structural diagram of the wearable device according to an embodiment of the present disclosure as seen from the top surface and a side cross-section along line A-A'. Referring to FIG. 17, the wearable device 200 may further include a protruding structure 250. For example, the vibration of the vibrating elements (221-22m) can be more clearly transmitted to the head by the protruding structure 250.

Figure 18 is a structural diagram of the wearable device according to an embodiment of the present disclosure as seen from the top surface and a side cross-section along line A-A'. Referring to Figures 16 and 18, a head-contacting frame 204 made of a slightly flexible but hard and sturdy material can be used instead of the head protection line 201. The head attachment frame 204 may be fixed to the fixed support 202 on the wearable device 200. A buffer member 203 that absorbs shock well can be inserted between the head-adhering frame 204 and the wearable device 200. A soft and elastic vibrating membrane 220 may be attached. The first to mth vibration elements (221 to 22m) and the protruding structure 250 may be attached to the vibrating membrane 220.

Figure 19 is a graph showing examples of types of vibration signal patterns that can be displayed by a vibration element according to an embodiment of the present disclosure. Referring to FIG. 19, the vibration signal pattern may be a pure sine wave (Pure Tone), a periodic on-off sine wave (Burst Sine), or a signal with amplitude control but different control frequencies (Amplitude Modulation 1, 2). Accordingly, danger signals can be distinguished and displayed by different types of vibration signal patterns. In the graph, the horizontal axis represents time, and the vertical axis represents the amplitude of the signal.

In an embodiment of the present disclosure, when an object is located at a dangerous distance from the wearable device, the vibration signal may be a pure sine wave. The amplitude (A) of the vibration signal may become larger as the distance between the wearable device and the object becomes closer.

In embodiments of the present disclosure, an object may approach the wearable device at a hazardous distance. In this case, as the distance between the object and the wearable device gets closer, a periodic on-off sine wave can be used as a vibration signal. Additionally, the width (T1) of the pulse signal can be kept constant, but the on-off period (T2) can be gradually shortened.

In an embodiment of the present disclosure, the amplitude of the vibration signal pattern can be controlled, but the beat period can be gradually shortened (for example, the beat period can be shortened from T3 to T4).

In an embodiment of the present disclosure, a vibration signal can be displayed by distinguishing between a case in which a danger is detected by receiving a signal transmitted by each ultrasonic sensor and a case in which a danger is detected by receiving a signal transmitted by another ultrasonic sensor.

20 is a flowchart of a method for detecting and displaying proximity to an object according to an embodiment of the present disclosure. Referring to FIG. 20, in step S110, the first to nth ultrasonic sensors may periodically transmit ultrasonic pulse signals.

In step S120, the signal processing unit may receive sensor information from the ultrasonic sensors and measure the time difference (t _jk ) between the pulse signal transmission time and reception time between the ultrasonic sensors themselves and each other.

In step S130, the signal processing unit may determine whether the distance to the object has reached a dangerous distance from the time difference (t _jk ) information.

In step S140, the signal processing unit may display a vibration signal according to the approach distance level for the vibration element corresponding to the ultrasonic sensor that detects information that the object is located at a dangerous distance.

The Time Of Flight (TOF) method may be used in steps S110 and S120.

In step S130, it can be determined whether the measured distance is less than or equal to the reference distance through the time (t _jk ) measured in step S120. Accordingly, the time difference between the transmission point and the reception point, t _jk (for 1≤j≤N, 1≤k≤N), is greater than the reference time difference, T _jk (for 1≤j≤N, 1≤k≤N). If it is less than or equal to the same value, it goes to step S140. Otherwise, it goes back to step S110.

The wearable device according to the present disclosure can be applied to various forms such as a neckband, safety helmet, headband, glasses, waist belt, and vest.

Although specific embodiments have been described in the detailed description of the present disclosure, various modifications are possible without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the above-described embodiments, but should be determined by the claims and equivalents of this disclosure as well as the claims described below.

100: Wearable device
111~11n: 1st to nth ultrasonic sensors
120: Vibration element module
121~12n: 1st to mth vibration elements
12a: frame
12b: Pupil
12c: Vibration membrane
12d: protruding structure
130: signal processing unit
140: Energy storage devices such as batteries
200: Wearable device
201: Head protection rope
202: support
203: Buffer member
211~21n: 1st to nth ultrasonic sensors
220: Vibrating membrane
240: Fixing member
250: Protruding structure

Claims (1)

a first ultrasonic sensor configured to output a first pulse signal and receive a first reflected signal;
a second ultrasonic sensor configured to output a second pulse signal and receive a second reflected signal;
a first vibration element corresponding to the first ultrasonic sensor and configured to generate a vibration signal in response to the first reflection signal;
a second vibration element corresponding to the second ultrasonic sensor and configured to generate a vibration signal in response to the second reflection signal;
Receive first sensor information from the first ultrasonic sensor, receive second sensor information from the second ultrasonic sensor, and generate the first vibration signal or the first sensor information based on the first sensor information and the second sensor information. 2 comprising a signal processing unit configured to generate a vibration signal,
The first sensor information is a comparison between the reception time of the first reflected signal, where the first pulse signal or the second pulse signal is reflected by an external object, and the transmission time of the first pulse signal or the second pulse signal. Indicates information, and the second sensor information includes the reception point of the second reflected signal at which the first pulse signal or the second pulse signal is reflected by an external object and the transmission of the first pulse signal or the second pulse signal. Indicates information comparing points in time,
The signal processor is a time difference between the time of transmission of the first pulse signal or the second pulse signal derived from the first sensor information or the second sensor information and the time of reception of the first reflected signal or the second reflected signal. When is less than or equal to a predetermined reference time difference, an object proximity detection and display wearable device that generates the first vibration signal or the second vibration signal corresponding to the first ultrasonic sensor or the second ultrasonic sensor.

Images