JP6796889B2 - Systems and programs, etc. - Google Patents

Description

The present invention relates to a system, a program, and the like.

There are various types of systems that measure the speed of vehicles traveling on the road. In the case of the radar system, a speed measuring device installed along the road emits microwaves in a predetermined frequency band toward the vehicle, receives reflected waves from the vehicle, and measures the traveling speed of the vehicle.

For users such as vehicle drivers, it may be useful to be able to grasp the existence of the speed measuring device in advance. Patent Documents 1 and 2 disclose an electronic device that receives microwaves emitted from a vehicle speed measuring device and outputs an alarm when it detects that the vehicle speed measuring device is present.

Japanese Unexamined Patent Publication No. 2008-64588 JP-A-2017-96728

The moving speed of an object can also be measured using light. In the case of this optical method, the light emitting device emits light toward an object, receives the reflected wave from the object, and measures the moving speed. Even when such an optical speed measuring device is installed, it is desirable to be able to notify the user of its existence. One of the objects of the present invention is to provide a technique for notifying a user of the existence of a light emitting device that emits light having a specific wavelength.

The object of the invention of the present application is not limited to this, and there is an intention to acquire rights by divisional application, amendment, etc. even for a configuration for the purpose of obtaining an effect produced from a portion of the configuration disclosed in the present specification, drawings, etc. .. For example, the present specification discloses a problem in which the part described as "can be" is replaced with "is a problem" in the present specification. The issues are described as independent, and the intention is to acquire the rights to solve each issue independently by divisional application, amendment, etc. Even if the subject matter is implicitly grasped from the description in the specification, the applicant intends to make a part of the structure described in the specification within the scope of claims by amendment or divisional application. It also discloses a structure that solves problems that combine these independent problems, and has the intention to acquire rights.

(1) A system that detects a light emitting device that emits light of a specific wavelength, and the light receiving unit that receives light of a selected wavelength among the incident light and the light receiving unit select and receive the light of the specific wavelength. A control unit that controls to notify the presence of the light emitting device based on the first light receiving amount at the time and the second light receiving amount when the light receiving unit selects and receives light having a wavelength different from the specific wavelength. And, a system is provided.

The light receiving unit may receive not only the light to be received, but also light other than this light (hereinafter referred to as "disturbed light"). This disturbed light may be mistaken for the light intended for light reception. Therefore, it may not be possible to sufficiently eliminate the influence of ambient light simply by selecting and receiving light of a specific wavelength. The light emitting device emits light having energy concentrated at a specific wavelength, but disturbance light often has energy distributed in a wider wavelength region. Therefore, if the above system is used, the light emitting device that emits the light of the specific wavelength while reducing the notification that the ambient light is mistaken for the light from the light emitting device as compared with the case where the light of the specific wavelength is simply selected and received. The existence can be notified to the user.

The light emitting device may be a device that emits light whose energy is distributed in a wavelength region narrower than that of ambient light. The specific wavelength may be a wavelength at which the energy of the light emitted by the light emitting device peaks. The specific wavelength is often a wavelength that is not perceived by humans, for example, it is preferable to have energy at a specific wavelength outside the visible light region. The specific wavelength belongs to, for example, the infrared light region, and is preferably 850 nm. The specific wavelength is not limited to this, and may be 950 nm, 1900 nm or other wavelengths. The wavelength different from the specific wavelength may be a wavelength different from the wavelength at which the energy of the light emitted by the light emitting device peaks. A wavelength different from the specific wavelength may be a wavelength included in the visible light region. The first light receiving amount may indicate the light amount of a specific wavelength selected and received by the light receiving unit. Selecting a wavelength means selecting a part of the wavelength from a certain wavelength region and not selecting at least a part of the other wavelengths. The second light receiving amount may indicate a light amount having a wavelength different from the specific wavelength received by the light receiving unit. The first light receiving element is used to obtain the first light receiving amount, and the second light receiving element is used to obtain the second light receiving amount, but there are cases where a single light receiving element is used to obtain the first light receiving amount and the second light receiving amount. You may.

(2) The light emitting device may be a system that emits pulsed light having the specific wavelength, and the control unit controls the notification according to at least the number of pulses specified based on the first light receiving amount. ..

The number of pulses received by the light receiving unit may change depending on the positional relationship between the light receiving unit and the light emitting device. In this way, it is possible to notify the user according to the positional relationship between the light receiving unit and the light emitting device.

(3) In the light emitting device, the light receiving unit is provided in the vehicle, and the control unit stops the notification control according to the number of pulses when another vehicle is present within a predetermined range from the vehicle. It is good to have a system that does. It may be said that stopping the control for notifying according to the number of pulses does not change the content of the control for notifying according to the number of pulses.

If another vehicle is within a predetermined range from the position of the own vehicle, part or all of the light from the light emitting device may be blocked by the other vehicle, and the number of light pulses received by the light receiving unit may decrease. is there. By doing so, it is possible to reduce notifications that are mistakenly recognized due to the presence of another vehicle.

(4) The light emitting device emits pulsed light having the specific wavelength, and the control unit controls the notification according to at least the pulse width or the pulse interval specified based on the first light receiving amount. It is good to do.

Reference to the pulse width or pulse interval of the received light may be useful in detecting a light emitting device that emits a specific pulsed light. By doing so, it is possible to reduce the notification that the ambient light is mistaken for the light from the light emitting device.

(5) The control unit may be a system that performs the notification control according to the magnitude of the first light receiving amount.

The amount of light received at a specific wavelength in the light receiving unit increases as it approaches the light emitting device. By doing so, it is possible to reduce the notification that the ambient light is mistaken for the light from the light emitting device.

(6) The control unit may be a system that performs the notification control when the position information of the current position satisfies a predetermined condition.

In this way, the existence of the light emitting device specified based on the current position can be notified without receiving the light from the light emitting device.

(7) The control unit may be a system that performs the notification control when the current position is on a road of a predetermined type.

In this way, the presence of the light emitting device can be notified without receiving the light from the light emitting device on the type of road where the light emitting device may exist.

(8) The control unit notifies the existence of the light emitting device by the first method according to the first light receiving amount and the second light receiving amount, and is different from the first method depending on the current position. It is preferable to use a system that controls the notification so that the presence of the light emitting device is notified by the method 2.

In this way, the notification method differs depending on whether the presence of the light emitting device is notified based on the amount of received light or the current position, so that the user can grasp the event that caused the notification. It will be easier.

(9) A radio wave receiving unit for receiving a predetermined radio wave is provided, and the control unit notifies the existence of the light emitting device by a first method according to the first light receiving amount and the second light receiving amount, and the predetermined one. It is preferable to use a system that controls the notification so that the presence of the radio wave generator is notified by a third method different from the first method according to the reception of the radio wave.

In this way, the notification method differs depending on whether the presence of the predetermined radio wave generator is notified or the presence of the radio wave generator is notified, so that the user can grasp the event that caused the notification. It will be easier to do. The predetermined radio wave may be a microwave.

(10) After performing the notification control, the control unit notifies that the image has been captured or has not been captured, depending on whether or not a predetermined light has been received by the light receiving unit. It is good to have a system that does.

In this way, when the presence of the light emitting device is notified, it is possible to further notify the user whether or not the user has been imaged.

(11) The light receiving unit receives the first wavelength selection unit that selects and transmits light of a specific wavelength from the incident light and the light transmitted by the first wavelength selection unit, and the first unit. A first light receiving element that outputs a first signal according to the amount of light received, a second wavelength selection unit that selects light having a wavelength different from the specific wavelength among the incident light and transmits the light, and the second wavelength. A system may include a second light receiving element that receives light transmitted by the selection unit and outputs a second signal corresponding to the second light receiving amount.

In this way, the presence of the light emitting device can be notified by the configuration using at least two sets of wavelength selection units and light receiving elements.

(12) A system including a differential amplifier that amplifies the voltage difference between the first signal and the second signal is preferable.

In this way, the existence of the light emitting device can be accurately notified based on the difference between the first light receiving amount and the second light receiving amount.

(13) It is preferable that the system includes the light receiving portion and includes a housing having a first window corresponding to the first light receiving element and a second window corresponding to the second light receiving element.

In this way, the presence of the light emitting device can be notified by the configuration using at least two sets of light receiving elements housed in the housing.

(14) A system provided in the first window and the second window and provided with a visible light cut filter that blocks visible light may be used. Blocking visible light should at least attenuate visible light.

In this way, since the first window and the second window are provided with filters that block visible light, the wavelength selection unit and the light receiving element housed in the housing are less likely to be visually recognized by the user.

(15) The first light receiving element and the second light receiving element may be a system having no lens.

In this way, the light receiving angle of the light receiving portion can be increased as compared with the case where the lens is provided.

(16) The housing may be a system having a partition wall that blocks light between the first light receiving element and the second light receiving element.

In this way, the light transmitted through the first light receiving element is received by the second light receiving element or is received by the second light receiving element, as compared with the case where the partition wall is not provided between the first light receiving element and the second light receiving element. The possibility that the light transmitted through the element is received by the first light receiving element is reduced.

(17) The light receiving portion may be a system shielded with a conductive material.

In this way, the signal output by the light receiving element is less susceptible to electromagnetic noise than in the case where the housing is not formed of the conductive material.

(18) The system may include a plurality of the light receiving units.

In this way, the presence of the light emitting device can be notified by using the plurality of light receiving units.

(19) The plurality of light receiving units include a first light receiving unit whose specific wavelength is the first wavelength and a second light receiving unit whose specific wavelength is a second wavelength different from the first wavelength. It is good to do.

In this way, even if there are a plurality of light emitting devices having different wavelengths of light emitted by the light emitting device, or the wavelength of the light emitted by the light emitting device is changed, the existence of the light emitting device can be notified.

(20) A program for realizing the function of the control unit of any of the above systems on a computer is provided.

By doing so, it is possible to reduce the notification that the ambient light is mistaken for the light from the light emitting device.

The inventions shown in (1) to (20) above can be arbitrarily combined. For example, it is preferable to add at least a part of the structure of at least one invention after (2) to all or part of the structure of the invention shown in (1). In particular, the invention shown in (1) may be an invention in which at least a part of at least one of the inventions after (2) is added. Further, an arbitrary configuration may be extracted from the inventions shown in (1) to (20), and the extracted configurations may be combined. The applicant of the present application intends to acquire rights to an invention including these configurations. Further, even if there is a description of "in the case of" or "in the case of", it is not described as a configuration limited to that case or at that time. These show examples of better configurations and are willing to acquire rights in these cases and in occasional configurations. In addition, the places where the description is accompanied by an order are not limited to this order. It also discloses a configuration in which some parts have been deleted or the order has been changed, and has the intention of acquiring rights.

In the systems (1) to (20), the presence of the light emitting device is notified based on the third light receiving amount when the light receiving unit selects a specific wavelength and receives light instead of the second light receiving amount. It is better to control. In this case, it is preferable that each of the two or more light receiving elements receives light having the same specific wavelength. In this way, it is possible to notify the user of the existence of a light emitting device that emits light having a specific wavelength.

It has a light receiving unit that receives incident light, and a control unit that controls to notify the presence of a light emitting device based on a pulse width or a pulse interval specified based on the amount of light received by the light receiving unit. A system may be provided. In this way, it is possible to notify the user of the existence of a light emitting device that emits light having a specific wavelength.

According to the present invention, it is possible to notify the user of the existence of a light emitting device that emits light having a specific wavelength.

The effect of the invention of the present application is not limited to this, and the effect exerted from the part of the constitution disclosed in the present specification and the drawings and the like is also disclosed, and the right of the constitution exhibiting the effect is acquired by divisional application, amendment, etc. Have the intention to do. For example, in the present specification, the part described as "can be" is a description that clearly indicates the effect to be exerted, and there is a part that shows the effect even if there is no description of "can be". Moreover, even if there is no such description, there is an effect that can be grasped by the configuration.

It is a figure which shows the structure of the electronic device which concerns on 1st Embodiment. It is a figure which shows an example of the waveform of the pulsed light emitted by the speed measuring apparatus which concerns on 1st Embodiment. It is a rear view of the electronic device which concerns on 1st Embodiment. It is sectional drawing of the electronic device which concerns on 1st Embodiment. It is sectional drawing of the electronic device which concerns on 1st Embodiment. It is a figure explaining an example of the schematic property of the 1st wavelength selection part and the 2nd wavelength selection part which concerns on 1st Embodiment. It is a block diagram which shows the electrical structure of the electronic device which concerns on 1st Embodiment. It is a flowchart which shows the operation of the electronic device which concerns on 1st Embodiment. It is a figure which shows an example of the display screen of the electronic device which concerns on 1st Embodiment. It is a figure which shows an example of the display screen of the electronic device which concerns on 1st Embodiment. It is a figure which shows an example of the display screen of the electronic device which concerns on 1st Embodiment. It is a figure which shows an example of the display screen of the electronic device which concerns on 1st Embodiment. It is a flowchart which shows the operation of the electronic device which concerns on 1st Embodiment. It is a figure which shows an example of the display screen of the electronic device which concerns on 1st Embodiment. It is a figure which shows an example of the waveform of the pulsed light received by the electronic device which concerns on the modification of 1st Embodiment. It is a figure which shows an example of the display screen of the electronic device which concerns on the modification of 1st Embodiment. It is a figure explaining the reason why the number of pulses of the pulsed light received by the electronic device which concerns on the modification of 1st Embodiment decrease. It is a flowchart which shows the operation of the electronic device which concerns on the modification of 1st Embodiment. It is a figure explaining the outline of the system which concerns on 2nd Embodiment. It is a flowchart which shows the operation of the electronic device which concerns on 2nd Embodiment. It is a figure which shows an example of the display screen of the electronic device which concerns on 2nd Embodiment. It is a block diagram which shows the structure of the system which concerns on 3rd Embodiment. It is a figure explaining an example of the schematic property of the 1st wavelength selection part and the 2nd wavelength selection part which concerns on 3rd Embodiment. It is a block diagram which shows an example of arrangement of the light receiving part in the system which concerns on 3rd Embodiment. It is a figure which shows the circuit structure example of the light receiving part which concerns on one modification. It is a six-sided view which shows an example of the appearance composition of an electronic device. It is a figure explaining an example of the characteristic of the 1st wavelength selection part and the 2nd wavelength selection part which concerns on one modification. It is a figure which shows the structure of the light receiving part which concerns on one modification. It is a figure which shows the control performed by the control part which concerns on one modification.

Hereinafter, embodiments will be described in detail with reference to the drawings. The embodiments shown below are examples of the embodiments of the present disclosure, and the present disclosure is not limited to these embodiments. In the drawings referred to in the present embodiment, the same part or a part having a similar function is given the same code or a similar code (a code in which A, B, etc. are simply added after the numbers), and the process is repeated. The description of may be omitted. Further, in each figure referred to in the following description, the scale may be different from the actual scale in order to make each member, each region, etc. recognizable. Hereinafter, a case where the system of the present disclosure is applied to a system mounted on a vehicle and detecting a speed measuring device that emits light having a specific wavelength will be described.

[1. First Embodiment]
<1-1. Configuration of the first embodiment>
FIG. 1 is a diagram showing a configuration of a system according to the first embodiment. The electronic device 10 is an electronic device to which the system according to the present disclosure is applied. The electronic device 10 is a detector compatible with an optical system and a radar system. The electronic device 10 targets the speed measuring device 30 for detection. The optical method is a method of detecting the light emitted by the speed measuring device 30. The light emitted by the speed measuring device 30 is pulsed light in the present embodiment. More specifically, the light emitted by the speed measuring device 30 is a pulse laser having a constant pulse width. In this case, the optical method can also be called a laser method. The radar method is a method of receiving a predetermined radio wave emitted by a speed measuring device (not shown). The predetermined radio wave is a microwave in this embodiment.

The electronic device 10 is a monitor-type device having a substantially rectangular parallelepiped shape. The electronic device 10 is installed in the vehicle interior of the vehicle 40. The electronic device 10 is installed on the dashboard 41 using, for example, double-sided tape. The housing of the electronic device 10 is the housing 100. An opening is provided on the front surface of the housing 100. The electronic device 10 has a display unit 13 for displaying an image at the position of the opening. The housing 100 is made of resin or other material.

The speed measuring device 30 is installed at a speed control point of the vehicle. The speed measuring device 30 may be, for example, either a fixed type or a mobile type, but may be a mobile type. The mobile type includes, for example, a portable type and a vehicle-mounted type. In the case of the mobile type, the electronic device 10 can detect the speed measuring device 30 by an optical method even if the position information of the speed control point is not known. In the example of FIG. 1, the speed measuring device 30 is installed on a sidewalk adjacent to a roadway and measures the speed of a vehicle traveling on the roadway. The speed measuring device 30 measures the distance to the vehicle within a predetermined distance (for example, 70 m), and further measures the speed of the vehicle at a predetermined distance (for example, 20 m) closer to the own device.

The speed measuring device 30 includes a speed measuring unit 31, an imaging unit 32, and a strobe 33. The speed measuring unit 31 measures the speed of the vehicle by a laser scanning method. Specifically, when the pulsed light Lout reaches the vehicle 40 and is reflected, the speed measuring unit 31 receives the reflected light Lref. The speed measuring unit 31 measures the distance to the vehicle 40 based on the time required from emitting the pulsed light Lout to receiving the reflected light Lref. The speed measuring unit 31 measures the distance to the vehicle 40. The measurement is repeated, and the speed of the vehicle 40 is measured based on the moving distance of the vehicle 40 in a unit time.

The velocity measuring unit 31 emits pulsed light Lout while changing the direction within the fan-shaped range T having a central angle of θ. θ is, for example, 110 degrees. The range T includes a range on the upstream side in the traveling direction of the vehicle 40 wider than a range on the downstream side than the position where the speed measuring device 30 is installed. The velocity measuring unit 31 changes the emission direction of the pulsed light Lout in the counterclockwise direction. For example, the velocity measuring unit 31 emits the pulsed light Lout in the direction of arrow D1 and then emits the pulsed light Lout in the direction of arrow D2. The emission direction of the pulsed light Lout is, for example, a substantially horizontal direction. The speed measuring unit 31 emits pulsed light to, for example, a mirror rotating at a constant speed. The pulsed light reflected by the mirror and emitted from the light emitting window is the pulsed light Lout.

The pulsed light Lout has energy concentrated in a specific wavelength. The specific wavelength may be a wavelength at which the energy of the light emitted by the light emitting device peaks. It is desirable that the pulsed light Lout has energy at a specific wavelength outside the visible light region, for example. The specific wavelength is often a wavelength that is not perceived by humans, for example, it is preferable to have energy at a specific wavelength outside the visible light region. The specific wavelength belongs to, for example, the infrared light region and is 850 nm. However, the specific wavelength is not limited to this, and may be 950 nm, 1900 nm or other wavelength.

FIG. 2 is a diagram showing an example of the waveform of the pulsed light Lout emitted from the speed measuring device 30. The pulsed light Lout here is a square wave. However, the pulsed light Lout may be a sine wave, a triangular wave, a sawtooth wave, or other waveform. The pulsed light Lout is light in which the period T1 and the period T2 appear alternately. The period T1 is a period during which pulsed light having a specific wavelength λout is emitted. During period T1, the pulsed light Lout alternates between high level (H) and low level (L). The period T2 is a period during which the light of this pulse waveform is not emitted. As described above, the speed measuring device 30 emits pulsed light to a mirror rotating at a constant speed, and emits pulsed light Lout reflected by the mirror. Therefore, the period during which the pulsed light from the mirror does not face the direction of the light emitting window of the speed measuring device 30 is the period T2.

The image pickup unit 32 takes an image of the target vehicle when the speed measured by the speed measurement unit 31 is equal to or greater than the threshold value. The imaging unit 32 is used to image a vehicle that violates the speed. The strobe 33 emits light when it is imaged by the imaging unit 32. The image pickup unit 32 may take an image based on the light in the infrared light region so that the image can be taken even at night. In this case, the strobe 33 may emit light having energy in the infrared light region. The speed measuring device 30 transmits data such as the measured speed and the captured image to an external computer.

FIG. 3 is a rear view of the electronic device 10. As shown in FIG. 3, a first window 101 and a second window 102 are formed on the back surface of the housing 100. The first window 101 and the second window 102 are openings for guiding external light to the inside of the housing 100. The first window 101 and the second window 102 are arranged at predetermined intervals in the left-right direction. The first window 101 and the second window 102 are, for example, rectangular, but may have other shapes. A light receiving unit 12 is provided inside the housing 100. The light receiving unit 12 receives the light incident through the first window 101 and the second window 102.

4 and 5 are cross-sectional views of the electronic device 10. FIG. 4A is a cross-sectional view (I-I cross-sectional view of FIG. 3) when the electronic device 10 is cut along the vertical direction at a position including the first window 101. FIG. 4B is a cross-sectional view (II-II cross-sectional view of FIG. 3) when the electronic device 10 is cut along the vertical direction at a position including the second window 102. FIG. 5 is a cross-sectional view (III-III cross-sectional view of FIG. 3) when the electronic device 10 is cut along the left-right direction at a position including the first window 101 and the second window 102. It is a graph which shows an example of the schematic property of the wavelength selection part which will be described later which the light receiving part 12 has. In FIG. 6, the horizontal axis corresponds to the wavelength and the vertical axis corresponds to the transmittance.

As shown in FIGS. 4A and 4B, the visible light cut filter 126 is provided in the first window 101. The second window 102 is provided with a visible light cut filter 127. The visible light cut filters 126,127 block at least a part of visible light. The visible light cut filters 126 and 127 transmit light having a specific wavelength of λout. Blocking visible light should at least attenuate visible light. The visible light region is, for example, 400 to 700 nm. Due to the presence of the visible light cut filters 126 and 127, the parts housed inside the housing 100 are less likely to be visually recognized from the outside. Further, due to the presence of the visible light cut filters 126 and 127, it is possible to reduce the adverse effect of the light receiving unit 12 receiving strong visible light such as direct sunlight.

As shown in FIG. 4A, a first wavelength selection unit 121 and a first light receiving element 122 are provided facing the first window 101. The first wavelength selection unit 121 selects and transmits light having a specific wavelength of λout from the incident light. Selecting a wavelength may mean selecting a part of the wavelength from a certain wavelength region and not selecting at least a part of the other wavelengths. The first wavelength selection unit 121 here is a bandpass filter. As shown by a solid line in FIG. 6, light of a wavelength region including a specific wavelength λout, here, a wavelength region from wavelength λ1a to wavelength λ1b is transmitted, and light of other wavelength regions is blocked. Blocking light means at least attenuating the light, and the amount of attenuation is larger at a wavelength that blocks light than at a wavelength at which light is transmitted. The characteristics of the first wavelength selection unit 121 are determined from the viewpoint of transmitting only light having the same wavelength as the pulsed light from the speed measuring device 30 as much as possible. The width of the wavelength region from the wavelength λ1a to the wavelength λ1b is, for example, 20 nm, but it is more desirable that the width is narrower than this.

In FIG. 6, the transmittance of the frequency region through which light is transmitted is represented as 100%, and the frequency region in which light is blocked is represented as approximately 0%. However, the transmittance may be practically acceptable. The wavelength selection unit preferably exhibits steep characteristics as illustrated in FIG. 6, but may exhibit broader characteristics. For example, there may be a wavelength in which the transmittances of the first wavelength selection unit 121 and the second wavelength selection unit 123 are not 0%.

The first light receiving element 122 receives the light transmitted by the first wavelength selection unit 121, and outputs a first signal corresponding to the first light receiving amount, which is the received light amount. The first light receiving element 122 is preferably a photodiode, for example, but may be a phototransistor or other light receiving element. The first light receiving element 122 has sensitivity at least in the infrared light region. The first light receiving element 122 includes, for example, a resin mold that transmits infrared light. The first light receiving element 122 may not receive light in a wavelength region of 700 nm or less. The first light receiving element 122 is a so-called lensless type light receiving element having no lens. As a result, the light receiving angle of the first light receiving element 122 becomes large (for example, 120 to 180 degrees), and light in multiple directions can be received. Instead of this, a lens or a mirror may be combined to widen the light receiving angle of the first light receiving element 122.

As shown in FIG. 4B, a second wavelength selection unit 123 and a second light receiving element 124 are provided facing the second window 102. The second wavelength selection unit 123 is a filter that selects and transmits light in a wavelength region different from the specific wavelength λout from the incident light. The wavelength different from the specific wavelength may be a wavelength different from the wavelength at which the energy of the light emitted by the light emitting device peaks. A wavelength different from the specific wavelength may be a wavelength included in the visible light region. The second wavelength selection unit 123 is, for example, a band elimination filter. As shown by the broken line in FIG. 6, the second wavelength selection unit 123 blocks the light in the wavelength region including the specific wavelength λout, here, the wavelength region from the wavelength λ2a to the wavelength λ2b, and the light in the other wavelength region. To be transparent. The wavelength region from the wavelength λ2a to the wavelength λ2b does not include the specific wavelength λout, and it is desirable that the wavelength region other than the specific wavelength λout is included as widely as possible. The characteristics of the second wavelength selection unit 123 are determined from the viewpoint of transmitting only light having a wavelength different from the pulsed light Lout from the speed measuring device 30 as much as possible.

The second light receiving element 124 receives the light that has passed through the second wavelength selection unit 123, and outputs a second signal corresponding to the second light receiving amount, which is the received light amount. The second light receiving element 124 is, for example, a photodiode, but may be a phototransistor or another light receiving element. It is preferable that the second light receiving element 124 has the same light receiving element having the same characteristics as the first light receiving element 122, for example, the product (for example, model number). This is because when the second light receiving element 124 and the first light receiving element 122 receive the same light, the first signal Sig1 and the second signal Sig2 become the same signal. Like the first light receiving element 122, the second light receiving element 124 is a so-called lensless type sensor without a lens.

As shown in FIG. 5, the housing 100 includes a partition wall 103 that blocks light between the first light receiving element 122 and the second light receiving element 124. It is desirable that the distance between the first light receiving element 122 and the second light receiving element 124 is as small as possible. This is to prevent a difference in the incident timing of light between the first light receiving element 122 and the second light receiving element 124. Even in this case, due to the presence of the partition wall 103, the light transmitted through the first wavelength selection unit 121 is received by the second light receiving element 124, and the light transmitted through the second wavelength selection unit 123 is received by the first light receiving element 122. Is less likely to receive light.

The light receiving portion 12 is preferably shielded with a conductive material. This shield is composed of, for example, a metallic case. As a result, the influence of electromagnetic noise on the electronic components in the housing 100 is reduced.

The first window 101, the second window 102, and the light receiving unit 12 are obliquely forward (for example, left front) with respect to the traveling direction of the vehicle 40 when the display unit 13 of the electronic device 10 is directed toward the driver's seat of the vehicle 40. It may be provided so as to face. As a result, the light receiving unit 12 may easily receive the pulsed light Lout from the speed measuring device 30.

FIG. 7 is a block diagram showing an electrical configuration of the electronic device 10. The control unit 11 controls each unit of the electronic device 10. The control unit 11 is, for example, a computer including an arithmetic processing circuit and a memory. The arithmetic processing circuit includes, for example, a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or other arithmetic processing circuits. The memory includes, for example, a RAM (Random Access Memory) or other volatile memory. The arithmetic processing circuit performs various controls by temporarily reading data into a memory and performing arithmetic processing.

The light receiving unit 12 includes a first wavelength selection unit 121, a first light receiving element 122, a second wavelength selection unit 123, a second light receiving element 124, and an interface 125. For example, the first wavelength selection unit 121 selects a wavelength region from the wavelength λ1a to the wavelength λ1b from the incident light and transmits it as light Lin1. The first light receiving element 122 receives light Lin1 and outputs a first signal Sig1 corresponding to the first light receiving amount. The first light receiving amount may indicate the light amount of a specific wavelength selected and received by the light receiving unit 12. The first signal Sigma1 indicates the amount of light received by Lin1. The second wavelength selection unit 123 selects a wavelength region different from the wavelength region from the wavelength λ2a to the wavelength λ2b and transmits it as light Lin2. The second light receiving element 124 receives the light Lin2 and outputs the second signal Sig2 according to the second light receiving amount. The second light receiving amount may indicate a light amount having a wavelength different from the specific wavelength selected and received by the light receiving unit 12. The second signal Sigma2 indicates the amount of light received by Lin2. The interface 125 processes the first signal Sig1 and the second signal Sig2, and outputs the processed signal to the control unit 11. The interface 125 converts, for example, the first signal Sigma1 and the second signal Sigma2 into a digital format and outputs them.

The display unit 13 displays an image. The display unit 13 is, for example, a 3.2-inch color TFT liquid crystal display. However, the display unit 13 may be an organic EL display or another type of display device. The speaker 14 outputs audio. The microwave receiving unit 15 includes an antenna and a receiving circuit to receive microwaves. The GPS (Global Positioning System) receiving unit 16 includes an antenna and a receiving circuit, and receives a signal from a GPS satellite. The GPS receiving unit 16 processes the received signal and outputs the position information. The position information includes, for example, latitude information and longitude information, and may further include altitude information. The communication unit 17 communicates with the external device. The communication unit 17 performs wireless communication of, for example, Wi-Fi (registered trademark), Bluetooth (registered trademark) or other methods.

The storage unit 18 stores data. The storage unit 18 stores, for example, a program for the control unit 11 to perform various controls. The control unit 11 reads the program from the storage unit 18 into the memory and executes it. Further, the storage unit 18 stores map data indicating a map, data indicating the types and locations of various facilities, data for notifying the existence of an object to be notified, data for realizing a route guidance function, and the like. The objects to be notified are, for example, a dozing driving accident point, a speed measuring device (radar method, loop coil type, H system, LH system, photoelectric tube type, mobile type, etc.), speed limit switching point, control area, inspection area, ban. Monitoring area, N system, traffic monitoring system, intersection monitoring point, signal neglect deterrence system, police station, accident-prone area, on-board aiming area, steep / continuous curve (expressway), branch / confluence point (expressway), ETC lane advance guidance (expressway), service area (expressway), parking area (expressway), highway oasis (expressway), smart interchange (expressway), PA / SA gas station (expressway), tunnel ( Expressway), highway radio reception area (expressway), prefectural border announcement, roadside station, viewpoint parking, etc. The storage unit 18 stores the type information of these notification objects, the position information indicating the position thereof, the data of the image (for example, a schematic diagram or a photograph) displayed on the display unit 13, and the audio data in association with each other. To do.

The storage unit 18 may include a storage medium for permanently storing data. The storage unit 18 may include, for example, an optical recording medium, a magnetic recording medium, and a semiconductor recording medium, or other recording medium.

The operation unit 19 accepts the user's operation. The operation unit 19 includes, for example, a touch sensor, a volume adjustment button, and a work button. The touch sensor is provided on the surface of the display unit 13 and detects the position touched by the user. The volume control button is operated to adjust the volume of the sound output from the speaker 14. The work button is a button for performing various tasks.

The sensor unit 20 includes various sensors. The sensor unit 20 includes, for example, a geomagnetic sensor, an acceleration sensor, and an illuminance sensor. The geomagnetic sensor is a sensor that detects the geomagnetism and detects in which direction the north direction is with respect to the traveling direction. The acceleration sensor is a sensor that detects the front-back, left-right, and up-down acceleration of the vehicle. The illuminance sensor is a sensor that detects the illuminance indicating the brightness of the vehicle interior.

The mounting unit 21 is a mounting unit on which an external storage medium is mounted. The external storage medium is, for example, a memory card. In this case, the mounting unit 21 is a memory card slot. The data stored in the storage unit 18 may be taken in via an external storage medium. As this data, there is update information of new notification target (target) information (position information such as longitude / latitude, type information, etc.).

The power supply unit 22 supplies the electric power supplied from the power supply to each unit in the electronic device 10. The power supply unit 22 includes, for example, a power switch and a DC jack. The DC jack is for connecting a cigar plug cord, and is connected to the cigar socket of the vehicle via the cigar plug cord to receive power supply. The power switch is a switch for turning on or off the power of the electronic device 10.

The light emitting unit 23 emits light in various colors. The light emitting unit 23 includes, for example, a light emitting diode.

The cable terminal portion 24 is a terminal to which an external connection cable is connected. For example, the connection cable is a cable that connects the electronic device 10 to the OBD-II connector mounted on the vehicle. The OBD-II connector is also called a failure diagnosis connector, is connected to the ECU of the vehicle, and outputs various vehicle information.

In addition to the above, the electronic device 10 may have a function provided by a well-known radar detector.

<1-2. Operation of the first embodiment>
Next, the operation of this embodiment will be described.
<1-2-1. Notification by optical method>
FIG. 8 is a flowchart showing the operation of the control unit 11 of the electronic device 10. FIG. 8 shows an operation when the speed measuring device 30 is detected by an optical method. When the electronic device 10 starts operating, the control unit 11 executes the process described below. The trigger for starting the operation of the electronic device 10 is not particularly limited, but for example, it may be triggered when the power of the electronic device 10 is turned on or the execution of the route guidance function is started.

First, the control unit 11 starts displaying the map screen on the display unit 13 (step S1). The map screen is a screen showing the position of the own vehicle on the map. The map displayed on the display unit 13 is specified based on the map data and the position information from the GPS receiving unit 16. The own vehicle position is specified based on the position information from the GPS receiving unit 16. FIG. 9 is a diagram showing an example of a map screen. On the map screen shown in FIG. 9, an icon I1 indicating the position of the own vehicle is arranged on the map M. In addition, on the map screen, the address of the current position, the distance to the predetermined notification target (here, "1960 m to the H system"), the speed limit, and the photograph around the speed control point are displayed. FIG. 10 is a diagram showing another example of the map screen. Also on the map screen shown in FIG. 10, an icon I1 indicating the position of the own vehicle is arranged on the map M. Hereinafter, an example of control when the map screen shown in FIG. 10 is displayed will be described. The icon of the present embodiment may be replaced with a character, a symbol, a figure, or another object.

Next, the control unit 11 acquires the first signal Sig1 and the second signal Sig2 from the light receiving unit 12 (step S2). Next, the control unit 11 calculates the difference between the first received light amount corresponding to the first signal Sig1 and the second received light amount corresponding to the second signal Sig2 (step S3). Next, the control unit 11 determines whether or not the calculated difference is equal to or greater than the threshold value (step S4). If the difference is less than the threshold value, the control unit 11 determines "NO" in step S4 and returns to the process of step S2. In this case, the control unit 11 does not notify that the speed measuring device 30 exists, assuming that the speed measuring device 30 has not been detected.

On the other hand, when the calculated difference is equal to or greater than the threshold value, the control unit 11 determines "YES" in step S4 and performs notification control (step S5). The notification control is a control for notifying the existence of the speed measuring device 30. The notification control can be said to be a control for issuing an alarm for the user to recognize what the speed measuring device is doing. Here, the notification control is a control for notifying the user of the existence of the speed measuring device 30 by the first method. The notification control includes, for example, a control for displaying the notification screen on the display unit 13.

FIG. 11 is a diagram showing an example of the notification screen. The notification screen shown in FIG. 11 is a screen in which the window W1 is superposed on the map screen described above. In the window W1, an icon M1 indicating the existence of the speed measuring device 30 and a message indicating the existence of the speed measuring device 30 such as "You are approaching the speed control point. Please be careful." Are arranged. The icon M1 is an icon that allows the user to recognize that the speed measuring device 30 is compatible with the optical method. The notification control may include a control for outputting the notification voice from the speaker 14. In this case, the control unit 11 may output the voice "The laser speed control point is approaching. Please be careful." From the speaker 14. The notification control may include controls other than these, and may include, for example, a control for causing the light emitting unit 23 to emit light. The notification control may be any control that notifies the presence of the speed measuring device 30 by a method that the user can recognize.

Next, the control unit 11 determines whether or not to end the process of FIG. 8 (step S6). The timing of the end of the process is not particularly limited, but for example, it is preferable that the power of the electronic device 10 is turned off by the operation of the operation unit 19 or the route guidance function is stopped. If it is determined as "NO" in step S6, the control unit 11 returns to the process of step S2 and repeats the above process. (Step S4). For example, when the difference changes from the threshold value or more to the threshold value or less, the control unit 11 determines “NO” in step S4 and stops the notification control. In this case, the control unit 11 causes the display unit 13 to display the map screen shown in FIG. This is because it means that the vehicle has passed the speed control point. If "YES" is determined in step S6, the control unit 11 ends the process of FIG. 8 (step S7).

Here, the reason why the speed measuring device 30 can be detected by the above-mentioned method will be described. As described with reference to FIG. 6, the first wavelength selection unit 121 selects light having a specific wavelength λout (more specifically, a wavelength region from the wavelength λ1a to the wavelength λ1b) in which the pulsed light Lout has energy. Make it transparent. Therefore, the first signal Sigma 1 should show a large amount of light received during the period when the pulsed light Lout is received, and show a small amount of light received during the other period. However, the light receiving unit 12 may receive not only the pulsed light Lout, which is the object of light reception, but also ambient light. This disturbed light may be mistaken for pulsed light. Disturbed light includes, for example, light that arrives when sunlight is periodically blocked by the branches and leaves of a tree swayed by the wind. Other disturbance lights include light that is periodically turned on and off from traffic lights and advertisements, and light from a rotating warning light that rotates at a constant speed. Further, the light received by the light receiving unit also changes due to the vibration of the light receiving unit. For example, when the vehicle 40 travels on a place where periodic vibration is generated, such as on a pier, the direction of the light receiving unit 12 (for example, the first light receiving element 122) changes accordingly, and light such as sunlight is emitted to a predetermined value. It may be received as light that is repeatedly turned on and off in a cycle. Even in such a case, the first signal Sigma 1 shows a relatively large amount of received light.

On the other hand, the second wavelength selection unit 123 blocks light having a specific wavelength λout (in this embodiment, a wavelength region from wavelength λ2a to wavelength λ2b) in which the pulsed light Lout has energy, and blocks light in other wavelength regions. Allows light to pass through. Therefore, the amount of light received by the second signal Sig2 becomes small during the period in which the pulsed light Lout is received. The second light receiving element 124 receives the above-mentioned disturbance light, and such disturbance light generally has a wide wavelength region in which energy is distributed. Therefore, it is considered that the amount of light received by the second light receiving element 124 is large even when the light receiving unit 12 receives the ambient light that is periodically turned on and off. Therefore, it can be estimated that the pulsed light Lout is received when the received amount of the first signal Sig1 is large and the received amount of the second signal Sig2 is small, that is, when the difference between the received amounts is equal to or more than the threshold value. On the other hand, when the received amount of the first signal Sig1 is large and the received amount of the second signal Sig2 is also large, that is, when the difference in the received amount is less than the threshold value, the possibility that the pulsed light Lout is received is low. Can be estimated. Therefore, according to the electronic device 10, by receiving light using the first light receiving element 122 and the second light receiving element 124, improvement in the detection accuracy of the speed measuring device 30 can be expected.

<1-2-2. Radar notification>
The control unit 11 may further execute the process of FIG. 13 in parallel with the process of FIG. 8 based on the microwave received by the microwave receiving unit 15.

First, the control unit 11 acquires a microwave reception signal from the microwave reception unit 15 (step S11). Next, the control unit 11 performs a determination process for determining the presence or absence of a radar-type speed measuring device based on the received microwave signal (step S12). In step S12, the control unit 11 may determine whether or not a speed control point exists based on the frequency band of the received microwave. The algorithm for this determination may be, for example, the method described in Patent Document 1 or 2, and the description thereof will be omitted.

Next, the control unit 11 determines whether or not the speed measuring device has been detected based on the result of the determination process (step S13). If it is determined as "YES" in step S13, the control unit 11 performs notification control (step S14). Here, the notification control is a control for notifying the user of the existence of the speed measuring device by a third method. The notification control includes, for example, a control for displaying the notification screen on the display unit 13. FIG. 14 is a diagram showing an example of the notification screen. The notification screen shown in FIG. 14 is a screen in which the window W2 is superposed on the map screen described above. In the window W2, an icon M2 indicating the existence of the speed measuring device 30 and a message indicating the existence of the speed measuring device such as "You are approaching the speed control point. Please be careful." Are arranged. The icon M2 is an icon that allows the user to recognize that the speed control device is compatible with the radar system. That is, the icon M2 is different from the icon M1. The notification control may include a control for outputting the notification voice from the speaker 14. In this case, the control unit 11 may output a voice message "The radar is approaching the speed control point. Please be careful." From the speaker 14. The information control information may be a control other than these, and may include, for example, a control for causing the light emitting unit 23 to emit light. Here, too, the notification control may be any control that notifies the existence of the speed measuring device by a method that the user can recognize.

<1-3. Modification example of the first embodiment>
The control unit 11 may further perform the following control.
<1-3-1. Notification according to the number of pulses>
When the speed measuring device 30 emits light having a pulse waveform, it is also useful to refer to the number of pulses in detecting the speed measuring device 30. FIG. 15 is a diagram showing an example of the waveform of the pulsed light Lout received by the electronic device 10. FIG. 15A shows a case where the distance between the electronic device 10 and the speed measuring device 30 is relatively large, and FIG. 15B shows a case where the distance between the electronic device 10 and the speed measuring device 30 is relatively small. As shown in FIG. 15A, when the distance between the speed measuring device 30 and the electronic device 10 is relatively large, the pulsed light Lout traveling in the direction of the electronic device 10 can be received, but the speed measuring device 30 on the road can receive the pulse light Lout. Pulsed light in a direction propagating only in a close position (for example, right beside the velocity measuring device 30) is not received. Therefore, the light receiving period Rx1 of the pulsed light Lout is relatively shorter than the non-light receiving period Rx2. As shown in FIG. 15B, when the distance between the speed measuring device 30 and the electronic device 10 is relatively small, the pulsed light Lout traveling in the direction of the electronic device 10 can be received, and the speed measuring device 30 on the road. It can also receive pulsed light in the direction propagating only at a position close to. Therefore, the light receiving period Rx1 of the pulsed light Lout is relatively longer than the non-light receiving period Rx2. Further, it is considered that the number of pulses decreases immediately after the vehicle 40 passes the position of the speed measuring device 30.

Therefore, the control unit 11 may perform notification control according to the number of pulses. The control unit 11 may change the notification level according to, for example, the number of pulses included in the reception period of the pulsed light. The notification level is an index of how important the content of the notification is to the user, and may be paraphrased as the alarm level in the present embodiment. The control unit 11 specifies the number of pulses at least based on the amount of light received by the first light receiving element 122. For example, the control unit 11 raises the notification level because it is close to the speed measuring device 30 during the period when the number of pulses is equal to or higher than the threshold value or the period when the number of pulses is increasing. The control unit 11 lowers the notification level because the speed measuring device 30 is far from or away from the speed measuring device 30 during the period when the number of pulses is less than the threshold value or the period when the number of pulse widths is decreasing. The control unit 11 changes the notification method according to the notification level. For example, the control unit 11 may change the message to be displayed on the display unit 13, change the notification voice output from the speaker 14, or change the emission color of the light emitting unit 23 according to the notification level.

Further, the control unit 11 may estimate the distance from the number of pulse widths and notify according to the distance. For example, as shown in FIG. 16, the control unit 11 may estimate the position of the speed measuring device 30 from the number of pulse widths and display it on the map. In this example, the icon P indicates the position of the speed measuring device 30. As described above, the control unit 11 can notify the user according to the positional relationship between the light receiving unit 12 and the speed measuring device 30.

By the way, as shown in FIG. 17, when another vehicle is present in front of the vehicle 40, the vehicle C traveling in front may obstruct all or part of the pulsed light Lout. In this case, the positional relationship may not be accurately specified even by referring to the number of pulses. Therefore, the control unit 11 detects the presence or absence of another vehicle C in front of the vehicle 40 within a predetermined range. When the other vehicle C does not exist, the control unit 11 may perform notification control according to the number of pulses, and when the vehicle C exists, the control unit 11 may stop the notification control. It may be said that stopping the control for notifying according to the number of pulses does not change the content of the control for notifying according to the number of pulses. Further, the electronic device 10 may stop the notification control according to the number of pulses when the inter-vehicle distance is less than the threshold value, and may perform this notification control when the distance is equal to or more than the threshold value. The method of detecting the vehicle C is not particularly limited, but there is a method of using the in-vehicle camera 50. The in-vehicle camera 50 is a camera used for, for example, a drive recorder, and here, the front of the vehicle 40 is imaged.

FIG. 18 is a flowchart showing the operation of the control unit 11 of the electronic device 10 in this case. The control unit 11 acquires an captured image from the vehicle-mounted camera 50 via the communication unit 17 (step S21). Next, the control unit 11 analyzes the captured image (step S22). The algorithm for analyzing the captured image does not matter, but there is, for example, a pattern matching method. Then, the control unit 11 determines whether or not there is a vehicle in front (step S23). If it is determined as "NO" in step S23, the control unit 11 determines that the notification control is performed according to the number of pulses (step S24). In this case, the control unit 11 performs processing such as rewriting the flag to a value indicating that control is performed according to the number of pulses. If it is determined as "YES" in step S23, the control unit 11 determines that the notification control according to the number of pulses is stopped (step S25). In this case, the control unit 11 performs processing such as rewriting the predetermined flag to a value indicating that control is not performed according to the number of pulses. Here, the vehicle in front of the vehicle 40 was detected, but it may be behind the vehicle 40 or the like. The electronic device 10 may include the in-vehicle camera 50. As described above, the possibility of misidentifying the positional relationship between the light receiving unit 12 and the speed measuring device 30 due to the presence of another vehicle C is reduced.

<1-3-2. Control according to pulse width or pulse interval>
When the speed measuring device 30 emits pulsed light, it is also useful to refer to the pulse width or the pulse interval in detecting the speed measuring device 30. The speed measuring device 30 emits pulsed light having a specific wavelength at a predetermined duty ratio. Further, from the viewpoint of safety, the duty ratio of the pulsed light is set to a predetermined value or less. Therefore, the control unit 11 may determine whether or not the speed measuring device 30 exists based on the predetermined pulse width or pulse interval and the pulse width or pulse interval of the received light. For example, the control unit 11 determines that the speed measuring device 30 exists when it is included within a certain range from the reference pulse width or pulse interval, but determines that it does not exist in other cases. The control unit 11 specifies the pulse width or the pulse interval based on at least the amount of light received by the first light receiving element 122. As described above, the control unit 11 can reduce the notification that the ambient light is mistaken for the light from the light emitting device.

<1-3-3. Control according to the intensity of pulsed light>
It is also useful to refer to the intensity of the pulsed light of the received light in detecting the light emitting device. The closer the vehicle 40 is to the speed measuring device 30, the stronger the intensity of the pulsed light, and the farther away the vehicle 40 is, the smaller the distance is. Therefore, the control unit 11 may change the notification level according to the amount of pulsed light received by the first light receiving element 122. For example, the control unit 11 may raise the notification level when the intensity of the pulsed light is increasing, and lower the notification level when the intensity of the pulsed light is decreasing. Further, when the received amount of pulsed light is equal to or less than the threshold value, the control unit 11 may determine that the speed measuring device 30 does not exist. As described above, the control unit 11 can notify the user according to the positional relationship between the light receiving unit 12 and the speed measuring device 30.

<1-3-4. Notification of presence / absence of imaging>
After performing the notification control, the control unit 11 may perform control to notify that the image has been captured or that the light has not been captured, depending on whether or not a predetermined light has been detected. When the image pickup unit 32 takes an image, the strobe 33 emits light. Therefore, after performing the notification control, the control unit 11 may further notify that the image has been taken when the light of the strobe 33 is detected. Alternatively, if the control unit 11 does not detect the light of the strobe 33 after performing the notification control, it may notify that the image has not been captured. This allows the user to know whether the vehicle 40 has been imaged. The light receiving from the strobe 33 may be performed by using the light receiving unit 12, or another light receiving unit may be used.

[2. Second Embodiment]
In this embodiment, the electronic device 10 has a function of notifying the presence of the speed measuring device 30 even when the pulsed light and the microwave are not received. The electronic device of this embodiment may or may not have a part or all of the functions of the first embodiment described above.

<2-1. Configuration of the second embodiment>
FIG. 19 is a diagram illustrating an outline of the system of the present embodiment. As shown in FIG. 19, there are various types of roads. For example, on the road Ar1 that is also used for school roads called green belts, it is particularly important to observe the speed limit of the vehicle 40, and there is a possibility that the speed measuring device 30 will be installed on other types of roads. It is considered to be higher than Ar2. Therefore, the control unit 11 may notify the presence of the speed measuring device 30 when the electronic device 10 is located on a road of a predetermined type.

<2-2. Operation of the second embodiment>
FIG. 20 is a flowchart showing the operation of the control unit 11 of the electronic device 10. The control unit 11 acquires position information from the GPS receiving unit 16 (step S31). Next, the control unit 11 determines whether or not the current position indicated by the position information is within the predetermined area (step S32). Here, the control unit 11 determines whether or not the vehicle 40 is on the green belt based on the current position and the data stored in the storage unit 18. When the control unit 11 determines "YES" in step S32, the control unit 11 performs notification control (step S33). The notification control includes, for example, a control for displaying the notification screen on the display unit 13.

FIG. 21 is a diagram showing an example of a notification screen. The notification screen shown in FIG. 21 is a screen in which the window W3 is superposed on the map screen described above. In the window W3, an icon M3 indicating the existence of the speed measuring device 30 and a message indicating the existence of the speed measuring device such as "It is in the caution area for speed control" are arranged. The icon M3 is an icon that allows the user to recognize that the speed control point is performed based on the position information. That is, for example, the icon M3 is different from the icons M1 and M2. The notification control may include a control for outputting the notification voice from the speaker 14. In this case, the control unit 11 may output the voice "It is within the caution area for speed control" from the speaker 14. The notification control may include controls other than these, and may include, for example, a control for causing the light emitting unit 23 to emit light. The predetermined area is not limited to the green belt, and may be a one-way road or another type of road.

In this way, the existence of the light emitting device can be notified based on the position information, so that the existence can be notified without receiving the pulsed light from the speed measuring device 30.

[3. Third Embodiment]
In this embodiment, the electronic device 10 has a plurality of light receiving units that receive pulsed light.

FIG. 22 is a block diagram showing an electrical configuration of the electronic device 10. In this example, the electronic device 10 includes three light receiving units 12A, 12B, and 12C. Each configuration of the light receiving unit 12A, 12B, 12C may be the same as that of the light receiving unit 12 except for the characteristics of the wavelength selection unit. In FIG. 22, the display unit 13 to the cable terminal unit 24 described with reference to FIG. 6 are not shown.

FIG. 23 is a diagram showing the characteristics of the first wavelength selection unit 121 and the second wavelength selection unit 123 of the light receiving units 12A, 12B, and 12C of this embodiment. FIG. 23 (a) corresponds to the light receiving unit 12A, FIG. 23 (b) corresponds to the light receiving unit 12B, and FIG. 23 (c) corresponds to the light receiving unit 12C. As shown in FIGS. 23 (a) to 23 (c), the wavelength of the pulsed light to be received is different in each of the light receiving units 12A, 12B, and 12C. As shown by a solid line in FIG. 23A, the first wavelength selection unit 121 of the light receiving unit 12A transmits light in a wavelength region including a specific wavelength λout1, in this case, a wavelength region from wavelength λ11a to wavelength λ11b. Blocks light in a wavelength region different from that of. As shown by a broken line in FIG. 23A, the second wavelength selection unit 123 blocks light in a wavelength region including a specific wavelength λout1, here in a wavelength region from wavelength λ21a to wavelength λ21b, and has a wavelength different from this. Transmits light in the area. As shown by a solid line in FIG. 23B, the first wavelength selection unit 121 of the light receiving unit 12B transmits light in a wavelength region including a specific wavelength λout2, in this case, a wavelength region from the wavelength λ12a to the wavelength λ12b. Blocks light in a wavelength region different from that of. As shown by a broken line in FIG. 23B, the second wavelength selection unit 123 blocks light in a wavelength region including a specific wavelength λout2, in which wavelength region from wavelength λ22a to wavelength λ22b, and has a wavelength different from this. Transmits light in the area. As shown by a solid line in FIG. 23 (c), the first wavelength selection unit 121 of the light receiving unit 12C transmits light in a wavelength region including a specific wavelength λout3, in which a wavelength region from wavelength λ13a to wavelength λ13b is transmitted. Blocks light in a wavelength region different from that of. As shown by a broken line in FIG. 23C, the second wavelength selection unit 123 blocks light in a wavelength region including a specific wavelength λout3, in which wavelength region from wavelength λ23a to wavelength λ23b, and has a wavelength different from this. Transmits light in the area. λout1, out2, and out3 are, for example, 850 nm, 950 nm, and 1900 nm, but are not limited thereto.

When the speed measuring device 30 is detected based on the first signal Sigma1 and the second signal Sigma2 from any of the light receiving units 12A, 12B, and 12C, the control unit 11 notifies that the speed measuring device 30 exists. .. According to this embodiment, even if there are a plurality of speed measuring devices 30 having different wavelengths of light emitted by the electronic device 10, or the wavelength of light emitted by the speed measuring device 30 is changed, the speed measuring device 30 is present. Can be notified.

The characteristics of the plurality of light receiving units 12 may be the same. In this case, as shown in FIG. 24, the light receiving units 12A, 12B, and 12C may be provided at different positions of the vehicle 40. Here, the light receiving portion 12A is provided on the left front portion, the light receiving portion 12B is provided on the center front portion, and the light receiving portion 12C is provided on the right front portion. Thereby, the arrival direction of the laser can be estimated based on the light receiving timing of the laser in the light receiving units 12A, 12B, and 12C. For example, if it arrives from the left front, the light receiving timing of the light receiving unit 12A is relatively early, and if it arrives from the right front, the light receiving timing of the light receiving unit 12C is relatively early. Further, the control unit 11 may notify the user of the direction in which the pulsed light has arrived.

Further, the speed measuring unit 31 emits pulsed light to a mirror rotating at a constant speed, and emits pulsed light Lout reflected by the mirror. Therefore, for the light receiving timing of the pulsed light Lout in each of the light receiving units 12A, 12B, 12C, for example, the rotation speed of the mirror, the positions of the light receiving units 12A, 12B, 12C, and the speed measurement of the light receiving units 12A, 12B, 12C A difference appears depending on the distance from the device 30. Therefore, the control unit 11 may detect the speed measuring device 30 based on the light receiving timing of the pulsed light Lout in the light receiving units 12A, 12B, and 12C.

The light receiving units 12A, 12B, and 12C may receive different directions of light. For example, the orientation of the light receiving element may be different by 20 degrees between the light receiving units 12A, 12B, and 12C. As a result, there is a possibility that a decrease in detection accuracy due to the installation position of the speed measuring device 30 can be suppressed. In this embodiment, the number of light receiving units may be two or four or more.

[4. Configuration of light receiving unit 12]
Next, a configuration example of the light receiving unit 12 applicable to each of the above-described embodiments will be described.
FIG. 25 is a diagram showing a circuit configuration example of the light receiving unit 12. The first light receiving element 122 is a photodiode PD1 here. Light passing through the first wavelength selection unit 121 is incident on the light receiving surface of the photodiode PD1. The cathode of PD1 is connected to the power supply line on the high potential side, and the anode is connected to one end of the resistor R1. The other end of the resistor R1 is grounded. The input end of the inverter INV1 is commonly connected to the anode of the photodiode PD1 and one end of the resistor R1. The output end of the inverter INV1 is connected to the input terminal on the negative electrode side of the differential amplifier AMP. The second light receiving element 124 is a photodiode PD2 here. Light passing through the second wavelength selection unit 123 is incident on the light receiving surface of the photodiode PD2. The cathode of the photodiode PD2 is connected to the power supply line on the high potential side, and the anode is connected to one end of the resistor R2. The other end of the resistor R2 is grounded. The input end of the inverter INV2 is commonly connected to the anode of the photodiode PD2 and one end of the resistor R2. The output end of the inverter INV2 is connected to the input terminal on the positive electrode side of the differential amplifier AMP. As a result, a signal corresponding to the difference in the amount of light received by the photodiodes PD1 and PD2 is output from the output end of the differential amplifier AMP. The control unit 11 detects the speed measuring device 30 based on this difference. The control unit 11 may detect the speed measuring device 30 based on the signal after being amplified by the differential amplifier AMP.

[5. Appearance configuration of electronic device 10]
FIG. 26 is a six-view view showing an example of the external configuration of the electronic device 10. In this example, the illuminance sensor 201 of the display unit 13, the light emitting unit 23, and the sensor unit 20 is provided on the front surface of the housing of the electronic device 10. The speaker 14 is provided so as to output sound from the upper end surface of the housing 100. A mounting portion 21 (that is, an SD card slot) for mounting an SD card (registered trademark) is provided on the right end surface of the housing 100. A light receiving portion 12 is provided on the upper right portion of the back surface of the housing 100. Further, a power switch 221 and a DC jack 222 of the power supply unit 22 are provided in the lower left portion of the back surface of the housing 100. The area 104 is an area in which the model name and the serial number are written.

[6. Modification example]
The present disclosure is not limited to the above embodiment, and can be appropriately modified without departing from the spirit.

(Modification example 1)
The first wavelength selection unit 121 and the second wavelength selection unit 123 do not have to be bandpass filters, respectively. The first wavelength selection unit 121 and the second wavelength selection unit 123 may be composed of, for example, a combination of a low-pass filter and a high-pass filter. Further, the second wavelength selection unit 123 may be a low-pass filter as shown in the characteristics of FIG. 27 (a). In this example, the second wavelength selection unit 123 transmits light in a wavelength region lower than the wavelength λ2a and blocks light in a wavelength region higher than that. The second wavelength selection unit 123 may be a high-pass filter as shown in the characteristics of FIG. 27 (b). In this example, the second wavelength selection unit 123 transmits light in a wavelength region higher than the wavelength λ2b and blocks light in a wavelength region lower than that. Even in this case, the amount of light received by the second signal Sigma 2 becomes extremely small during the period in which the pulsed light Lout is received. The light receiving unit 12 receives not only the pulsed light Lout, which is the object of light reception, but also the disturbance light, and such disturbance light generally has a wide wavelength region in which energy is distributed. Therefore, even when the light receiving unit 12 receives the ambient light that is periodically turned on and off, the amount of light received is considered to be large. Therefore, it can be estimated that the pulsed light Lout is received when the received amount of the first signal Sig1 is large and the received amount of the second signal Sig2 is small, that is, when the difference is equal to or more than the threshold value. On the other hand, when the received amount of the first signal Sigma1 is large and the received amount of the second signal Sigma2 is also large, that is, when the difference is less than the threshold value, it can be estimated that the possibility that the pulsed light Lout is received is low. .. Therefore, according to the electronic device 10, by receiving light using the first light receiving element 122 and the second light receiving element 124, improvement in the detection accuracy of the speed measuring device 30 can be expected. Further, the first wavelength selection unit 121 and the second wavelength selection unit 123 may be configured by using an optical element other than a filter such as a prism.

(Modification 2)
In the above-described embodiment, the light receiving unit 12 has two light receiving elements 122 and a second light receiving element 124, but it may be configured to have only one. FIG. 28 is a diagram showing the configuration of the electronic device 10 in this modified example. In this example, the light receiving unit 12 does not have the first light receiving element 122 and the second light receiving element 124, but has the light receiving element 128. The light receiving element 128 may have the same configuration as the first light receiving element 122 or the second light receiving element 124. Further, the electronic device 10 of this modified example has a drive unit 60. The drive unit 60 moves the first wavelength selection unit 121 and the second wavelength selection unit 123 according to the control of the control unit 11. The drive unit 60 has, for example, a motor and gears. During the operation of the electronic device 10, the control unit 11 moves the first wavelength selection unit 121 and the second wavelength selection unit 123 so as to alternately cover the light receiving surface of the light receiving element 128. That is, as shown in FIG. 29A, the control unit 11 first provides the first wavelength selection unit 121 on the light receiving surface of the light receiving element 128. Then, the control unit 11 acquires the signal acquired from the light receiving element 128 at this time as the first signal Sig1. Next, as shown in FIG. 29B, the control unit 11 first separates the first wavelength selection unit 121 from the light receiving surface of the light receiving element 128, and provides the second wavelength selection unit 123 on the light receiving surface. Then, the control unit 11 acquires the signal acquired from the light receiving element 128 at this time as the second signal Sig2. Then, the control unit 11 detects the speed measuring device 30 based on the first signal Sigma 1 and the second signal Sigma 2.

(Modification 3)
In the above-described embodiment, the light receiving unit 12 has two light receiving elements 122 and a second light receiving element 124, but it is preferable that the light receiving unit 12 has three or more light receiving elements. Even in this case, the control unit 11 can be expected to improve the detection accuracy of the speed measuring device 30 by making the wavelength region of the selected light different for each of the three or more light receiving elements.

(Modification example 4)
In the above description, the light receiving unit 12 has at least one set of a wavelength selection unit and a light receiving element. Instead of this, the light receiving unit 12 may have a configuration in which it does not have a wavelength selection unit and has at least one light receiving element. For example, the light receiving unit 12 may receive a third light receiving amount when a specific wavelength is selected and received, instead of the second light receiving amount which is the light receiving amount of light having a wavelength different from the specific wavelength. In this case, the control unit 11 may perform control to notify the presence of the speed measuring device 30 based on the second light receiving amount and the third light receiving amount.

Further, the light receiving unit 12 may receive light incidented by a single light receiving element. Then, the control unit 11 may perform control to notify the presence of the speed measuring device 30 based on the pulse width or the pulse interval specified based on the received amount of the light received by the light receiving unit 12. The method using the pulse width or the pulse interval may be the same as the modification of the first embodiment described above.

(Modification 5)
The light receiving element may be an image pickup element included in a camera such as a drive recorder. For example, the control unit 11 acquires an image captured by the vehicle-mounted camera 50 and performs image analysis. The in-vehicle camera is preferably a camera that does not have an infrared cut filter. This is to prevent the pulsed light Lout from being blocked. Then, when the light of a specific pattern is received as a result of the image analysis, the control unit 11 controls to notify the existence of the speed measuring device 30. The control unit 11 may detect a specific pattern of light based on a change in brightness indicating that the light has a specific wavelength. When the light of a specific pattern is received, the control unit 11 may record a captured image for a period corresponding to the light receiving period. The period is, for example, a period of one minute before and after the timing at which a specific pattern of light is received, but is not limited to this.

(Modification 6)
The electronic device 10 may detect the speed measuring device 30 behind the vehicle 40. In this case, the light receiving unit 12 may be arranged so that the pulsed light from the vehicle 40 can be received.

(Modification 7)
When the electronic device 10 detects the speed measuring device 30, it may indicate the position of the speed measuring device 30 and upload information such as position information to the server. The server may be a server that provides a social networking service, or may be a server that manages and distributes updated information about the notification target.

Further, the system according to the present disclosure can be applied to detect a light emitting device that emits light having a specific wavelength, in addition to the detection of the speed measuring device.

(Modification 8)
Some of the configurations and operations described in each of the above embodiments may be omitted or modified. For example, the electronic device 10 may be a device that supports the optical system and does not support the radar system. Further, for example, the position, shape, and size of each member in the electronic device 10 are only an example. Further, the light receiving unit 12 may be provided outside the electronic device 10. For example, the light receiving unit 12 may be provided at a predetermined position on the vehicle 40, such as the position of the license plate. In this case, the control unit 11 may acquire a signal from the light receiving unit 12 via the communication unit 17.

(Modification 9)
Further, the control unit 11 may determine whether or not the speed measuring device 30 exists, and if at least determines that the speed measuring device 30 exists, output a signal indicating the determination result to the external device. .. This external device may notify that the speed measuring device 30 is present. The present invention can also be specified by a control device (for example, a control module) incorporated in the electronic device 10 and having the same function as the control unit 11.

The scope of the present invention is not limited to the configurations expressly described in the specification, but also includes a combination of various aspects of the present invention disclosed in the present specification. Of the present invention, the configuration for which a patent is sought is specified in the appended claims, but even if the configuration is not currently specified in the claims, it is disclosed in the present specification. We intend to make this configuration the scope of claims in the future.

The present invention is not limited to the configuration described in the above-described embodiment. The components of each of the above-described embodiments and modifications may be arbitrarily selected and combined. Further, any component of each embodiment or modification, and any component described in the means for solving the invention or any component described in the means for solving the invention are embodied. And may be configured in any combination. We also intend to acquire the rights to these in the amendment or divisional application of the present application. Even if there is a description of "when" or "when", it is not described as a configuration limited to that case or at that time. It also discloses these cases and unusual configurations, and has the intention to acquire the rights. In addition, the places where the description is accompanied by an order are not limited to this order. It also discloses a configuration in which some parts have been deleted or the order has been changed, and has the intention of acquiring rights.

In addition, he / she intends to acquire the right to the whole design or the partial design by filing a change application to the design application. Although the entire drawing of the device is drawn with solid lines, it is a drawing that includes not only the whole design but also the partial design requested for a part of the device. For example, it is a drawing which includes a part of the device as a partial design regardless of the member as well as a part of the member of the device as a partial design. As a part of the device, it may be a part of the device or a part of the member. Not only the whole design, but also the partial design in which any part of the solid line part of the drawing is a broken line part is intended to be granted the right.

10: Electronic device 11: Control unit 12: Light receiving unit 12A: Light receiving unit 12B: Light receiving unit 12C: Light receiving unit 13: Display unit 14: Speaker 15: Microwave receiving unit 16: GPS receiving unit 17: Communication unit 18: Storage unit 19: Operation unit 20: Sensor unit 21: Mounting unit 22: Power supply unit 23: Light emitting unit 24: Cable terminal unit 30: Speed measuring device 31: Speed measuring unit 32: Imaging unit 33: Strobe 40: Vehicle 41: Dashboard 50 : Vehicle-mounted camera 60: Drive unit 100: Housing 101: First window 102: Second window 103: Partition 104: Region 121: First wavelength selection unit 122: First light receiving element 123: Second wavelength selection unit 124: First 2 Light receiving element 125: Interface 126: Visible light cut filter 127: Visible light cut filter 128: Light receiving element 201: Illumination sensor 221: Power switch 222: DC jack

Claims (9)

It is a system that controls to issue an alarm in response to the reception of laser light for measuring the speed of a vehicle.
A housing with windows and
The visible light cut filter provided in the window and
With the lens
A light receiving unit that receives light incident on the inside of the housing from the window through the lens.
A control unit that controls to issue an alarm in response to the laser beam received by the light receiving unit.
With
The window and the light receiving portion are aligned in the first direction.
Inside the housing, there is a first region that is a region between the window and the light receiving portion in a second direction that intersects the first direction, and a second region that is different from the first region. having a portion located between the regions, region that shields are provided,
A system configured such that the second direction is the left or right direction when the housing is placed in the vehicle . The light-shielding portion is connected to the first portion and the housing is arranged in the vehicle in addition to the first portion which is a portion located between the first region and the second region. It has a second portion configured to extend in the second direction on the front side of the vehicle with respect to the light receiving portion.
In the second direction, the dimension of the second portion is larger than the dimension of the first region.
The system according to claim 1. It is a system that controls to issue an alarm in response to the reception of laser light for measuring the speed of a vehicle.
A housing with windows and
The visible light cut filter provided in the window and
With the lens
A light receiving unit that receives light incident on the inside of the housing from the window through the lens.
A control unit that controls to issue an alarm in response to the laser beam received by the light receiving unit.
With
Inside the housing, between a first region through which the optical path passes and a second region different from the first region in a direction intersecting the optical path of light incident on the inside of the housing. having a portion located, portions of shielding is provided,
A system configured such that when the housing is arranged in a vehicle, the first region and the second region are arranged side by side with the light-shielding portion interposed therebetween . Equipped with a radio wave receiver that receives radio waves to measure the speed of the vehicle
The control unit controls to issue an alarm in response to the reception of radio waves for measuring the speed of the vehicle by the radio wave receiving unit.
The light-shielding portion is formed of a material that transmits radio waves for measuring the speed of the vehicle.
The system according to any one of claims 1 to 3. The light-shielding portion is formed by using a resin.
The system according to any one of claims 1 to 4. The system according to any one of claims 1 to 5 , wherein the light-shielding portion is located on both sides of the first region. The light-shielding member has a side surface on the side of the first side and a side surface on the second side intersecting the first side as the inner side surface of the housing.
The system according to any one of claims 1 to 6 , wherein the first side is longer than the second side. A system that is installed in a vehicle and emits light of a specific wavelength including wavelengths outside the visible light region to notify the existence of a device that detects the presence of the vehicle.
A housing with windows and
The visible light cut filter provided in the window and
With the lens
A light receiving unit that receives light incident from the window through the lens and
A control unit that controls to notify the presence of the device according to the light of the specific wavelength received by the light receiving unit.
With
The window and the light receiving portion are aligned in the first direction.
Inside the housing, there is a first region that is a region between the window and the light receiving portion in a second direction that intersects the first direction, and a second region that is different from the first region. having a portion located between the regions, region that shields are provided,
A system configured such that the second direction is the left or right direction when the housing is placed in the vehicle . A system that is installed in a vehicle and emits light of a specific wavelength including wavelengths outside the visible light region to notify the existence of a device that detects the presence of the vehicle.
A housing with windows and
The visible light cut filter provided in the window and
With the lens
A light receiving unit that receives light incident from the window through the lens and
A control unit that controls to notify the presence of the device according to the light of the specific wavelength received by the light receiving unit.
With
Inside the housing, a portion located between a first region through which the optical path passes and a second region different from the first region in a direction intersecting the optical path of the incident light is provided. with, the site of shielding is provided,
A system configured such that when the housing is arranged in a vehicle, the first region and the second region are arranged side by side with the light-shielding portion interposed therebetween .