Notification device

Abstract

The present invention discloses a notification device that reduces notifications that annoy passengers. The notification device includes: a pair of detection units, spaced apart from each other in the vehicle width direction, each detecting an object approaching the vehicle; a pair of notification units, each corresponding to the pair of detection units, notifying passengers of the approaching object; a calculation unit, calculating the object's position and movement direction based on detection information from the pair of detection units; and a notification control unit, controlling the pair of notification units based on the object's position and movement direction calculated by the calculation unit. If an object detected by one detection unit moves toward the detection range of the other detection unit, the notification control unit controls the other notification unit corresponding to the other detection unit to suppress the notification compared to the notification unit corresponding to the first detection unit.

Description

Technical Field

[0001] The present disclosure relates to a notification device. Background Art

[0002] Conventionally, notification devices such as blind spot monitors (BSMs) have been put to practical use, which transmit signals such as millimeter-wave radars to the periphery of a vehicle to detect objects approaching the vehicle and notify passengers in the vehicle of the approaching objects.

[0003] Here, in commercial vehicles such as trucks, the range that the driver cannot directly visually recognize is large, and therefore it is required to detect objects in a wide range from the front to the sides of the vehicle.

[0004] Therefore, as a technology for detecting objects in a wide range, Patent Document 1 discloses a device in which a millimeter-wave radar is arranged at the front of a vehicle and six cameras are arranged at the front, both sides, and rear of the vehicle.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2011-063225. Summary of the Invention

[0008] Problems to be solved by the invention

[0009] However, in the device of Patent Document 1, if multiple notification units are configured corresponding to multiple detection units, each time an object moves and is detected by a different detection unit, the corresponding notification unit will notify the passenger of the object's approach, and the notification may annoy the passenger.

[0010] An object of the present disclosure is to provide a notification device that reduces notifications that may annoy passengers.

[0011] Means used to solve problems

[0012] The notification device involved in the present disclosure includes: a pair of detection units, which are arranged separately from each other in the vehicle width direction, and respectively detect objects approaching the vehicle; a pair of notification units, which are respectively arranged corresponding to the pair of detection units, and notify passengers of the approach of the objects; a calculation unit, which calculates the position and movement direction of the objects based on the detection information of the pair of detection units; and a notification control unit, which controls the pair of notification units based on the position and movement direction of the objects calculated by the calculation unit, and in a case where the object detected by one detection unit moves toward the detection range of the other detection unit, the notification control unit controls the other notification unit corresponding to the other detection unit to suppress the degree of notification compared with the one notification unit corresponding to the one detection unit.

[0013] Effects of the Invention

[0014] According to the present disclosure, notifications that annoy passengers can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing the configuration of a vehicle including the notification device according to the first embodiment of the present disclosure.

[0016] Figure 2 This figure shows a situation where speakers and lights are arranged.

[0017] Figure 3 This is a diagram showing the main parts of the notification device involved in embodiment 2. DETAILED DESCRIPTION

[0018] Hereinafter, embodiments according to the present disclosure will be described with reference to the accompanying drawings.

[0019] (Implementation 1)

[0020] Figure 1 The structure of a vehicle including the notification device according to the first embodiment of the present disclosure is shown. The vehicle includes a cab 1, a loading section 2, and a notification device 3. Examples of the vehicle include commercial vehicles such as trucks.

[0021] The cab 1 is for passengers to ride on and is arranged at the front of the vehicle. In addition, the cab 1 is formed with a length that is accommodated in the front half of the vehicle in the vehicle front-rear direction.

[0022] The loading section 2 is used for loading cargo, for example, and is disposed behind the vehicle relative to the cab 1. The loading section 2 is formed long in the vehicle front-rear direction from the vicinity of the rear of the cab 1 to the rear of the vehicle.

[0023] Notification device 3 includes a pair of front detection units 4a and 4b and a pair of side detection units 5a and 5b. A calculation unit 6a is connected to front detection unit 4a and side detection unit 5a, while a calculation unit 6b is connected to front detection unit 4b and side detection unit 5b. Calculation units 6a and 6b are connected to notification units 8a and 8b via notification control unit 7. Notification device 3 can be implemented as a blind spot monitor, for example.

[0024] The front detection units 4a and 4b are arranged to be spaced apart from each other in the vehicle width direction, and each detects an object approaching the vehicle. The front detection units 4a and 4b can be configured, for example, by millimeter wave radars that transmit and receive millimeter waves to detect objects.

[0025] The front detection unit 4a is located near the left side of the front portion of the cab 1. The front detection unit 4a has a detection surface facing the front of the vehicle. It transmits and receives millimeter waves from this detection surface to detect objects within a detection range D1 extending in front of the detection surface. The front detection unit 4a is tilted so that the detection surface faces the left side.

[0026] The front detection unit 4b is located near the right side of the front portion of the cab 1. The front detection unit 4b has a detection surface facing the front of the vehicle. It transmits and receives millimeter waves from this detection surface to detect objects within a detection range D2 extending in front of the detection surface. Here, the front detection unit 4b is tilted so that the detection surface faces the right side.

[0027] The side detection units 5a and 5b are arranged to be spaced apart from each other in the vehicle width direction, and each detects an object approaching the vehicle. The side detection units 5a and 5b can be configured, for example, by millimeter wave radars that transmit and receive millimeter waves to detect objects.

[0028] The side detection unit 5a is disposed near the left side of the rear portion of the cab 1. The side detection unit 5a has a detection surface facing the left side of the vehicle and transmits and receives millimeter waves from the detection surface to detect objects within a detection range D3 extending in front of the detection surface.

[0029] The side detection unit 5b is disposed near the right side of the rear portion of the cab 1. The side detection unit 5b has a detection surface facing the right side of the vehicle and transmits and receives millimeter waves from the detection surface to detect objects within a detection range D4 extending in front of the detection surface.

[0030] The front detection units 4a and 4b and the side detection units 5a and 5b may be arranged at the same height or at different heights. For example, the side detection units 5a and 5b may be arranged at a lower position than the front detection units 4a and 4b.

[0031] The calculation unit 6a is connected to both the front detection unit 4a and the side detection unit 5a. The calculation unit 6a calculates the position and movement direction of objects within the detection range D1 based on the detection information from the front detection unit 4a. Furthermore, the calculation unit 6a calculates the position and movement direction of objects within the detection range D3 based on the detection information from the side detection unit 5a.

[0032] The calculation unit 6b is connected to both the front detection unit 4b and the side detection unit 5b. The calculation unit 6b calculates the position and movement direction of objects within the detection range D2 based on the detection information from the front detection unit 4b. Furthermore, the calculation unit 6b calculates the position and movement direction of objects within the detection range D4 based on the detection information from the side detection unit 5b.

[0033] Notification control unit 7 controls notification units 8a and 8b based on the object's position and movement direction calculated by calculation units 6a and 6b. Here, if an object detected by front detection unit 4a or side detection unit 5a moves toward detection range D2 of front detection unit 4b or detection range D4 of side detection unit 5b, notification control unit 7 controls notification unit 8b to suppress notification compared to notification unit 8a. Similarly, if an object detected by front detection unit 4b or side detection unit 5b moves toward detection range D1 of front detection unit 4a or detection range D3 of side detection unit 5a, notification control unit 7 controls notification unit 8a to suppress notification compared to notification unit 8b.

[0034] The notification unit 8a notifies passengers of the approach of an object and is disposed corresponding to the front detection unit 4a and the side detection unit 5a. The notification unit 8a includes a speaker 9a and a lamp 10a, each of which is connected to the notification control unit 7.

[0035] The notification unit 8b notifies passengers of the approach of an object and is arranged corresponding to the front detection unit 4b and the side detection unit 5b. The notification unit 8b includes a speaker 9b and a lamp 10b, each of which is connected to the notification control unit 7.

[0036] like Figure 2 As shown, the speaker 9a and the lamp 10a are arranged in the cabin of the cab 1 along the left pillar corresponding to the front detection unit 4a and the side detection unit 5a. On the other hand, the speaker 9b and the lamp 10b are arranged in the cabin of the cab 1 along the right pillar corresponding to the front detection unit 4b and the side detection unit 5b.

[0037] The speakers 9a and 9b notify the passengers of the approach of an object by sound, and the lights 10a and 10b notify the passengers of the approach of an object by light.

[0038] The functions of the calculation units 6a and 6b and the notification control unit 7 can also be implemented using computer programs. For example, a computer reader reads the program for implementing the functions of the calculation units 6a and 6b and the notification control unit 7 from a recording medium containing the program and stores it in a storage device. The CPU then copies the program stored in the storage device to the RAM, sequentially reads the instructions contained in the program from the RAM, and executes them, thereby implementing the functions of the calculation units 6a and 6b and the notification control unit 7.

[0039] Next, the operation of the first embodiment will be described.

[0040] First, if Figure 1As shown, the front detection units 4a and 4b, and the side detection units 5a and 5b, respectively, transmit millimeter waves to or receive millimeter waves from detection ranges D1 to D4. When the front detection unit 4a and the side detection unit 5a receive millimeter waves, the received signals are output to the calculation unit 6a. On the other hand, when the front detection unit 4b and the side detection unit 5b receive millimeter waves, the received signals are output to the calculation unit 6b.

[0041] Here, when there is an object in the detection ranges D1 to D4, for example, when there is an object in the detection range D1, the millimeter wave reflected by the object is received by the front detection unit 4a in a short time, and a reception signal including detection information of the object is output to the calculation unit 6a.

[0042] The calculation unit 6a then acquires detection information based on the received signals sequentially output from the front detection unit 4a and the side detection unit 5a, and calculates the positions of objects within the detection ranges D1 and D3 based on this detection information. Separately, the calculation unit 6b acquires detection information based on the received signals sequentially output from the front detection unit 4b and the side detection unit 5b, and calculates the positions of objects within the detection ranges D2 and D4 based on this detection information. The calculated positions of the objects are output from the calculation units 6a and 6b to the notification control unit 7.

[0043] Next, if the calculation unit 6a calculates the position of the object, that is, if the object is detected within the detection ranges D1 and D3, the notification control unit 7 controls the notification unit 8a corresponding to the front detection unit 4a and the side detection unit 5a to notify the passenger of the object's approach to the vehicle. On the other hand, if the calculation unit 6b calculates the position of the object, that is, if the object is detected within the detection ranges D2 and D4, the notification control unit 7 controls the notification unit 8b corresponding to the front detection unit 4b and the side detection unit 5b to notify the passenger of the object's approach to the vehicle.

[0044] This allows the passenger to recognize the approach of an object and stop the vehicle, thereby preventing the object from colliding with the vehicle.

[0045] Furthermore, calculation units 6a and 6b track the position of an object to calculate its direction of movement. Here, if calculation unit 6a calculates that an object detected by front detection unit 4a or side detection unit 5a is moving toward detection range D2 of front detection unit 4b or detection range D4 of side detection unit 5b, notification control unit 7 controls notification unit 8a to perform notifications at a normal rate and controls notification unit 8b to stop notifications. Similarly, if calculation unit 6b calculates that an object detected by front detection unit 4b or side detection unit 5b is moving toward detection range D1 of front detection unit 4a or detection range D3 of side detection unit 5a, notification control unit 7 controls notification unit 8b to perform notifications at a normal rate and controls notification unit 8a to stop notifications.

[0046] For example, when the front detection unit 4a detects an object T moving within the detection range D1, the calculation unit 6a calculates the position P1 of the object T based on the received signal from the front detection unit 4a. Furthermore, the calculation unit 6a tracks the position of the object T and calculates the direction of movement of the object T. The calculation unit 6a then calculates whether the object T has moved from the position P1 toward the detection range D2 of the front detection unit 4b and outputs the calculation result to the notification control unit 7.

[0047] When the calculation unit 6 a calculates that the object T is not moving toward the detection range D2 of the front detection unit 4 b , the notification control unit 7 controls the notification unit 8 a so as to perform notification at a normal level.

[0048] On the other hand, when the calculation unit 6a calculates that the object T is moving toward the detection range D2 of the front detection unit 4b, the notification control unit 7 controls the notification unit 8a to perform notification at a normal level, and controls the notification unit 8b to stop the notification even if the object T is detected by the front detection unit 4b. Figure 2 As shown, notifications from speaker 9a and light 10a corresponding to front detection unit 4a are provided at a normal rate. Meanwhile, even if object T is detected by front detection unit 4b, notifications from speaker 9b and light 10b corresponding to front detection unit 4b are stopped. In this case, notification control unit 7 can, for example, stop notifications from notification unit 8b at a predetermined time from when object T moves from position P1 to position P3, which is sufficiently far to the right of the vehicle. The predetermined time can be pre-set according to the detected position of object T or calculated based on the detected position and velocity of object T.

[0049] Generally speaking, when an object T detected by the front detection unit 4a moves toward the detection range D2 of the front detection unit 4b, the object T is detected by both the front detection unit 4a and the front detection unit 4b. Therefore, after the notification unit 8a corresponding to the front detection unit 4a provides notification at a normal rate, the notification unit 8b corresponding to the front detection unit 4b also provides notification at a normal rate. This causes the notification units 8a and 8b to provide notification of the same object T at the same rate, potentially causing annoyance to the passenger.

[0050] Therefore, when an object T detected by the front detection unit 4a moves toward the detection range D2 of the front detection unit 4b, the notification control unit 7 controls the notification unit 8b so as to stop the notification even if the front detection unit 4b detects the object T. This can reduce notifications that may annoy passengers.

[0051] Furthermore, notification control unit 7 only needs to control notification unit 8b to suppress notifications compared to notification unit 8a, and is not limited to controlling notification unit 8b to stop notifications. For example, notification control unit 7 can control notification unit 8b to provide notifications at a lower level than notification unit 8a. For example, notification control unit 7 can control speaker 9b and light 10b to provide notifications at a lower volume and light intensity than speaker 9a and light 10a. Furthermore, notification control unit 7 can also provide notifications through speaker 9a and light 10a, while simultaneously silencing speaker 9b and providing notifications only through light 10b.

[0052] Furthermore, generally speaking, connecting three or more detection units to a single calculation unit 6a significantly increases the amount of computation required. Therefore, the front detection unit 4a and the side detection unit 5a are connected to the calculation unit 6a, while the front detection unit 4b and the side detection unit 5b are connected to the calculation unit 6b. In this case, since the detection information from the front detection unit 4a and the side detection unit 5a, and the detection information from the front detection unit 4b and the side detection unit 5b are calculated by the calculation unit 6a and the calculation unit 6b, respectively, it may be difficult to uniformly control the notification units 8a and 8b in the notification control unit 7.

[0053] Therefore, when calculation unit 6a calculates that an object detected by front detection unit 4a or side detection unit 5a has moved toward detection ranges D2 and D4 of front detection unit 4b or side detection unit 5b, notification control unit 7 controls notification unit 8b based on the calculation result of calculation unit 6a so as to suppress notification compared to notification unit 8a. Thus, notification control unit 7 can perform control based solely on the calculation result of calculation unit 6a, thereby enabling unified control of notification units 8a and 8b while reducing the amount of calculation.

[0054] In this way, when the notification unit 8 a is being notified at a normal level, the notification control unit 7 controls the notification unit 8 a to stop the notification based on the elapsed time after the object T is detected by the front detection unit 4 a.

[0055] For example, after calculating that the object T has moved from position P1 toward the detection range D2 of the front detection unit 4b, the calculation unit 6a calculates the timing for the object T to reach a predetermined area R set in front of the vehicle, that is, position P2. Here, the predetermined area R is set between the right and left sides of the vehicle, and position P2 corresponds to the left side of the vehicle. Next, the calculation unit 6a calculates the time it takes for the object T, after reaching position P2, to reach position P3, which is sufficiently far to the right of the vehicle. The time it takes to reach position P3 can be pre-set based on the object T's position P2 or calculated based on the object T's position P2 and speed. These calculation results are sequentially output by the calculation unit 6a to the notification control unit 7.

[0056] Next, based on the calculation result of the calculation unit 6a, the notification control unit 7 starts notification by the notification unit 8a when the object T is detected at the position P1, and stops notification by the notification unit 8a when the object T reaches the position P3. Furthermore, the notification control unit 7 can also stop notification by the notification unit 8b at the same time as stopping notification by the notification unit 8a.

[0057] In this way, the notification control unit 7 stops the notification of the notification unit 8a based on the elapsed time after the front detection unit 4a detects the object T. Therefore, the notification units 8a and 8b can be controlled uniformly while reducing the amount of calculation.

[0058] Furthermore, when the notification control unit 7 controls the notification unit 8b to suppress notifications compared to the notification unit 8a, if the front detection unit 4b or the side detection unit 5b detects an object different from the object T, new calculation information indicating the position and movement direction of the other object is input from the calculation unit 6b to the notification control unit 7. Consequently, the notification control unit 7 determines that the other object has been detected by the front detection unit 4b or the side detection unit 5b, releases the suppression of notifications, and controls the notification unit 8b to perform notifications at a normal level.

[0059] Thus, when another object is detected by the front detection unit 4b or the side detection unit 5b, the notification control unit 7 controls the notification unit 8b to release the suppression of notification, thereby appropriately notifying the passenger of the approach of a new object.

[0060] Furthermore, the notification control unit 7 can also perform similar control when an object detected by the side detection unit 5a moves toward the detection range D4 of the side detection unit 5b. Furthermore, the notification control unit 7 can also perform similar control when an object detected by the front detection unit 4b or the side detection unit 5b moves toward the detection ranges D1 and D3 of the front detection unit 4a or the side detection unit 5a.

[0061] According to this embodiment, when an object detected by the front detection unit 4a or the side detection unit 5a moves toward the detection range D2 of the front detection unit 4b or the detection range D4 of the side detection unit 5b, the notification control unit 7 controls the notification unit 8b to suppress the level of notification compared to that of the notification unit 8a. Similarly, when an object detected by the front detection unit 4b or the side detection unit 5b moves toward the detection range D1 of the front detection unit 4a or the detection range D3 of the side detection unit 5a, the notification control unit 7 controls the notification unit 8a to suppress the level of notification compared to that of the notification unit 8b. This suppresses notifications from the notification unit corresponding to the detection unit that subsequently detects the object, thereby preventing notifications that may annoy passengers.

[0062] (Implementation Method 2)

[0063] Hereinafter, Embodiment 2 of the present disclosure will be described. Here, the description will focus on the differences from Embodiment 1 described above, and the same reference numerals are used for the same points as Embodiment 1 described above, and detailed description thereof will be omitted.

[0064] In the first embodiment, two calculation units 6a and 6b are provided for the front detection units 4a and 4b and the side detection units 5a and 5b. However, the number is not limited to two as long as a calculation unit that can calculate the position and movement direction of the object can be provided.

[0065] For example, Figure 3 As shown, a calculation unit 21 can be provided in place of the calculation units 6 a and 6 b of the first embodiment.

[0066] The calculation unit 21 is connected to the front detection units 4a and 4b and the side detection units 5a and 5b, respectively. The calculation unit 21 calculates the position and movement direction of objects within the detection ranges D1 to D4 based on the detection information from the front detection units 4a and 4b and the side detection units 5a and 5b.

[0067] In this way, the calculation unit 21 performs calculations based on the detection information of the front detection units 4a and 4b and the side detection units 5a and 5b, and thus can calculate the position and movement direction of the object existing in the detection ranges D1 to D4 with high accuracy.

[0068] Next, the notification control unit 7 controls the notification units 8a and 8b based on the position and movement direction of the object calculated by the calculation unit 21. Specifically, if the object detected by the front detection unit 4a or the side detection unit 5a moves toward the detection range D2 of the front detection unit 4b or the detection range D4 of the side detection unit 5b, the notification control unit 7 controls the notification unit 8b to suppress notifications compared to the notification unit 8a. Similarly, if the object detected by the front detection unit 4b or the side detection unit 5b moves toward the detection range D1 of the front detection unit 4a or the detection range D3 of the side detection unit 5a, the notification control unit 7 controls the notification unit 8a to suppress notifications compared to the notification unit 8b.

[0069] In this way, the notification control unit 7 controls the notification units 8a and 8b based on the position and movement direction of the object calculated with high accuracy by the calculation unit 21, thereby more reliably suppressing notifications that may annoy passengers.

[0070] According to this embodiment, the calculation unit 21 accurately calculates the position and movement direction of the object based on the detection information of the front detection units 4a and 4b and the side detection units 5a and 5b. Therefore, the notification control unit 7 can more reliably suppress notifications that annoy passengers.

[0071] In addition, in the above-mentioned embodiments 1 and 2, the notification units 8a and 8b are arranged separately from each other in the vehicle width direction, but they can be arranged corresponding to the front detection unit 4a and the side detection unit 5a, and the front detection unit 4b and the side detection unit 5b, and are not limited to this.

[0072] For example, the notification portions 8a and 8b may be disposed spaced apart from each other in the vertical direction. However, since the notification portions 8a and 8b can sense the position of the object, they are preferably disposed spaced apart from each other in the vehicle width direction.

[0073] Furthermore, while the aforementioned embodiments 1 and 2 employ forward detection units 4a and 4b and side detection units 5a and 5b, the configuration is not limited to a pair of detection units, provided they are spaced apart from each other in the vehicle width direction. For example, only forward detection units 4a and 4b may be employed, or five or more detection units may be employed.

[0074] In the aforementioned embodiments 1 and 2, the front detection units 4a and 4b and the side detection units 5a and 5b are located in the cab 1. However, the arrangement is not limited to this arrangement, as long as they are separated from each other in the vehicle width direction. For example, the side detection units 5a and 5b can also be located behind the loading area 2 to detect the rear of the vehicle. However, if the detection units are located in the loading area 2, there is a risk of interfering with the loading operation. Therefore, it is preferable that the detection units be located only in the cab 1.

[0075] In addition, in the above-mentioned embodiments 1 and 2, the front detection units 4a and 4b and the side detection units 5a and 5b are composed of millimeter-wave radars. However, as long as they can detect objects approaching the vehicle, they are not limited to this. For example, the front detection units 4a and 4b and the side detection units 5a and 5b can be composed of ultrasonic sensors, laser radars, cameras, etc. However, from the perspective of straightness, the front detection units 4a and 4b and the side detection units 5a and 5b are preferably composed of millimeter-wave radars.

[0076] In the above-described first and second embodiments, a member for loading cargo is disposed on the loading portion 2 . However, the present invention is not limited thereto as long as the member is disposed rearward of the vehicle relative to the cab 1 .

[0077] This application is based on Japanese Patent Application No. 2020-013539 filed on January 30, 2020, the contents of which are incorporated herein by reference.

[0078] Furthermore, the above-described embodiments are merely examples of specific implementations of the present invention, and the technical scope of the present invention should not be construed as limiting. That is, the present invention can be implemented in various ways without departing from its main purpose or key features. For example, the shapes and numbers of the various components described in the above-described embodiments are merely illustrative and can be appropriately modified for implementation.

[0079] Industrial availability

[0080] The notification device according to the present disclosure can be used as a device that detects an object approaching a vehicle and notifies a passenger of the object.

[0081] Explanation of symbols

[0082] 1 Cab

[0083] 2 Loading section

[0084] 3 Notification device

[0085] 4a, 4b front detection unit

[0086] 5a, 5b Side detection unit

[0087] 6a, 6b, 21 Calculation Department

[0088] 7 Notification Control Department

[0089] 8a, 8b Notification Department

[0090] 9a, 9b speakers

[0091] 10a, 10b lamps

[0092] D1~D4 detection range

[0093] T object

[0094] P1~P3 positions

[0095] R Specified area

Claims

1. A notification device, comprising: The first detection unit is arranged at a left side position on the vehicle and detects an object that enters its detection range; a second detection unit, disposed on the vehicle at a position on the right side of the first detection unit in the vehicle width direction, and detecting the object entering its detection range; The first notification unit is configured at a left side position on the vehicle corresponding to the first detection unit, and is triggered by the first detection unit detecting the object. notifying passengers of the vehicle of the approaching object; a second notification unit disposed at a right side position on the vehicle corresponding to the second detection unit, and configured to notify the passenger of the approach of the object when the second detection unit detects the object; a calculation unit configured to track the position of the object and calculate a moving direction of the object based on detection information of the first detection unit and the second detection unit; as well as a notification control unit that controls the first notification unit and the second notification unit based on the position and the moving direction of the object calculated by the calculation unit, When the object detected by the first detection unit moves toward the detection range of the second detection unit, first, the object is detected by the first detection unit and the notification control unit starts notification by the first notification unit, and then, when the object is detected by the second detection unit, the notification control unit controls the second notification unit in a manner that suppresses the degree of notification compared to the first notification unit.

2. The notification device according to claim 1, wherein: The calculation unit includes: a first calculation unit that calculates the position and movement direction of the object based on the detection information of the first detection unit; and a second calculation unit that calculates the position and movement direction of the object based on the detection information of the second detection unit.

3. The notification device according to claim 1, wherein: The notification control unit controls the first notification unit to stop notification based on an elapsed time after the first detection unit detects the object.

4. The notification device according to claim 1, wherein In a case where notification from the second notification unit is suppressed due to determination that the object detected by the first detection unit has moved toward the detection range of the second detection unit, the notification control unit controls the second notification unit to release the suppression of notification when a second object other than the object is detected by the second detection unit.

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