Systems and programs, etc.

Abstract

To provide a system that is superior to conventional ones in a radar detector.SOLUTION: In a radar detector, when "do not issue audio warning during suppression" is selected, a suppression process mutes audio output to a loudspeaker 20. As a result, even when a signal indicating microwaves received by a microwave receiver 11 is input to a control unit 18, no audio microwave warning will be issued. Consequently, only the warning will be displayed on a screen.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to, for example, systems and programs, etc.

Background Art

[0002] There is known a speed measurement system (radar) that emits microwaves toward a vehicle traveling on a road and measures the traveling speed of the vehicle based on the amount of Doppler shift of the reflected wave from the vehicle. There is a radar detector that issues an alarm when receiving the microwaves emitted from this speed measurement system, and it is a system that contributes to safe driving by issuing an alarm to a driver who has inadvertently exceeded the speed limit.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the conventional systems have had various problems. Therefore, an object of the present invention is to provide a system, a program, etc. having characteristics superior to the conventional ones.

[0005] The object of the present invention is not limited thereto, and the applicant intends to obtain rights through divisional applications, amendments, etc., for configurations that aim to obtain the effects derived from the components of the configuration disclosed in this specification and the drawings, etc. For example, problems that can be described in this specification as "~is possible" or "~is feasible" are disclosed in this specification. Each problem is described independently, and the applicant intends to obtain rights to each configuration for solving each problem independently through divisional applications, amendments, etc. Even if a problem is implicitly understood from the description in the specification, the applicant intends to include a part of the configuration described in this specification in the claims through amendment or divisional application. Furthermore, configurations that solve problems by combining these independent problems are also disclosed, and the applicant intends to obtain rights to them. [Means for solving the problem]

[0006] (1) The system comprises a microwave receiving means capable of receiving microwaves in a predetermined frequency range including the frequency of radar waves used to measure the vehicle speed, a control means having a function to control the microwave receiving means, and a control means having a function to issue an alarm when microwaves are received by the microwave receiving means, wherein the control means has a function to suppress alarms based on radio waves received by the microwave receiving means based on at least one of the following: limiting the receiving sensitivity of the microwave receiving means, the characteristics of the radio waves received by the microwave receiving means, the frequency of the radio waves received by the microwave receiving means, the characteristics of the receiving location of the microwave receiving means, and input information from other means other than the microwave receiving means.

[0007] In this way, we can provide users with a system that is superior to conventional systems. For example, when a vehicle equipped with this system approaches a new source of false alarms, which has become a problem recently, the number of false alarms can be reduced compared to before. In the same frequency range as the microwaves emitted from the speed measurement system, there are also microwaves emitted by vending machines for motion detection, etc., and microwaves emitted by vehicles to understand their relationship with other vehicles in front of and behind them, and the problem of alarms being issued based on the reception of these is becoming increasingly significant, but this system can reduce such problems.

[0008] In particular, the limitations on the receiving sensitivity of the microwave receiving means, the characteristics of the radio waves received by the microwave receiving means, the frequency of the radio waves received by the microwave receiving means, the characteristics of the receiving position of the microwave receiving means, and the suppression of alarms based on input information from means other than the microwave receiving means should be configured to detect at least one of the microwaves emitted by a vending machine or a vehicle to understand its relationship with other vehicles in front of or behind it. Compared to conventional automatic doors, vending machines are designed for unmanned sales and are therefore installed in large numbers in suburban areas where speed enforcement is likely to occur. Furthermore, vehicles that emit microwaves to understand their relationship with other vehicles in front of or behind them are themselves in motion, giving them the unprecedented characteristic that their detection location is unpredictable. In this way, problems such as constant alarms due to vending machines or such vehicles, causing noise and making it difficult to hear the original alarm, can be mitigated. In addition, the problem of drivers switching to a setting that does not emit alarms because of the constant alarms due to vending machines or such vehicles, thus preventing the original speed enforcement radar from sounding, can also be solved. This system makes it possible to avoid false alarms caused by microwaves from vending machines or vehicles that interfere with their intended use, while still ensuring that genuine alarms are properly issued.

[0009] "Suppression" can, for example, mean not issuing an alarm, but it should be done in a manner that is less noticeable than when the alarm is not suppressed. For example, if the alarm is configured to be issued by sound, it should be made quieter than when the alarm is not suppressed. For example, if the alarm is configured to be issued by screen display, the size of the alarm display should be made less conspicuous than when the alarm is not suppressed (for example, by displaying it in a small size). If the alarm is issued by sound and display, for example, when the alarm is not suppressed, the alarm is issued by both sound and display, while when the alarm is suppressed, the system should control it so that the alarm is not issued by sound but the alarm is displayed. As for suppression of the alarm, the sensitivity can be reduced, it can be canceled, or the content of the alarm can be changed. For example, it can be set to notify that there is a source of false alarm (for example, a vending machine). "Suppression" may be controlled to reduce the sensitivity of the microwave receiving means. The "warning" should be defined as a warning that notifies the detection of radar waves.

[0010] It is preferable to configure the system to identify vending machines and other similar devices from the intended alarm target using a combination of methods. In particular, it is preferable to configure the system to identify them based on input information from means other than microwave receiving means. "Other means" may be means for detecting vehicles that emit microwaves in order to understand their relationship with vending machines or other vehicles in front of or behind them.

[0011] As for "other means," for example, imaging means (e.g., a camera) may be provided. As for input information from other means, for example, video information taken by the vehicle may be used, and in particular, video information taken of the area around the vehicle may be used. As for the control of alarm suppression based on input information from other means other than microwave receiving means, for example, it may be possible to determine whether or not there is video of a false alarm source in the video taken by the vehicle, and if it is determined that there is, the alarm may be suppressed. As for the false alarm source, a vending machine or a vehicle that emits microwaves to understand the relationship with other vehicles in front of or behind it may be used. In particular, it is good to configure it as described in (9) and (10) below.

[0012] As an "other means," for example, a radio wave detection means that detects radio waves other than microwaves equipped on a device that emits microwaves that act as a source of false alarms (for example, a module that detects WiFi and / or Bluetooth radio waves equipped on a vending machine that emits microwaves) may be provided. As input information from other means, for example, a WiFi SSID or Bluetooth beacon information may be provided. As control of alarm suppression based on input information from other means other than microwave receiving means, for example, a radio wave detection means that detects radio waves other than microwaves equipped on a device that emits microwaves that act as a source of false alarms may determine whether or not it has detected the radio waves, and if it determines that it has detected them, it may suppress the alarm. As a source of false alarms, a vending machine or a vehicle that emits microwaves to understand its relationship with other vehicles in front of or behind it may be provided. In particular, it is good to configure it as described in (11) below.

[0013] (2) The control means is provided with a function to suppress alarms based on radio waves received by the microwave receiving means based on the characteristics of the radio waves received by the microwave receiving means, and the characteristics of the radio waves are the modulation scheme of the radio waves, and if the modulation scheme of the radio waves is not FSK modulation, the control means is provided with a function to suppress alarms based on radio waves received by the microwave receiving means.

[0014] In this way, alarms caused by unmodulated microwaves emitted by, for example, vending machines can be suppressed. In this way, alarms caused by StepFM-modulated microwaves emitted by one's own vehicle or other vehicles can be suppressed. In the case of "not FSK modulation," it is particularly good to have at least one of either unmodulated or StepFM modulation, and having both is particularly effective.

[0015] (3) The control means may include a function to suppress alarms based on the frequency of radio waves received by the microwave receiving means, wherein the predetermined frequency range includes the frequencies of microwaves emitted by vending machines and microwaves emitted by other vehicles, and may also include a function to suppress alarms when the frequency of the radio waves deviates from the frequency range emitted by a specific speed measuring device.

[0016] This method suppresses alarms based on microwaves that deviate from the frequency range of the speed measuring device. It is particularly effective when the microwave receiving means or control means is equipped with a function to scan (sweep) the receiving frequency of the microwave receiving means within a predetermined frequency range. The "radio wave frequency" may be the frequency corresponding to the control value for scanning, or a frequency counter may be provided to measure the frequency of the received radio wave. This method is particularly useful for microwaves from false alarm sources that do not overlap with the frequency range of the speed measuring device but are within a predetermined frequency range.

[0017] (4) The control means includes a function to suppress alarms based on the frequency of radio waves received by the microwave receiving means, and a function to scan the receiving frequency of the microwave receiving means, wherein the scanning of the receiving frequency includes a function to scan a range in which the frequency of the radio waves includes the range of frequencies emitted by different types of speed measuring devices, and to skip the range that deviates from the frequency range of all of the different types of devices. In this way, alarms based on microwaves that deviate from the frequency range of the speed measuring device can be suppressed.

[0018] (5) The control means includes a storage means for storing location information of a vending machine, and a function for acquiring the current location of the vehicle and a function for suppressing alarms based on the characteristics of the location received by the microwave receiving means, and preferably a function for suppressing alarms when approaching the location of a vending machine stored in the storage means as a characteristic of the location received by the microwave receiving means. This method can suppress false alarms caused by microwaves emitted by vending machines.

[0019] For example, since the location of a vending machine is publicly available on a sales promotion app for the vending machine, it would be good to configure the system to remember that location and suppress the alarm when microwaves are received while approaching that location.

[0020] (6) The control means has a function of acquiring the current position of the vehicle and a function of suppressing an alarm based on the limitation of the reception sensitivity of the microwave receiving means and the characteristics of the position received by the microwave receiving means. When the characteristics of the position received by the microwave receiving means approach the position of the vending machine stored in the storage means, it is preferable to adopt a configuration having a function of lowering the reception sensitivity as the limitation of the reception sensitivity. In this way, false alarms caused by microwaves emitted by vending machines can be suppressed.

[0021] For example, since the location of the vending machine is publicly available on applications for promoting vending machine sales, etc., its position is stored. When microwaves are received in a state of approaching the position, it is preferable to adopt a configuration in which the reception sensitivity of the microwaves is controlled to be lowered. (7) The position of the vending machine is preferably the position of a vending machine installed along the road. In this way, it is possible to prevent the situation where an alarm is suppressed as if approaching the position of a vending machine installed outside the roadside.

[0022] It is also possible to store only the positions of vending machines installed along the road in the storage means, or to control so that it is not considered as "when approaching" in the case of a position that is not a vending machine along the road even when approaching the position of the vending machine. (8) It is preferable to perform control that causes a difference in the degree of suppression depending on whether the position of the vending machine is on the right side or the left side of the traveling direction of the vehicle. In this way, the suppression and alarm of the alarm can be performed more accurately.

[0023] For example, when controlling the sensitivity to receive radio waves from vending machines on both sides of the traveling direction of the road, suppression control is performed for vending machines on both sides. When controlling the sensitivity to receive only radio waves from the vending machine on the left side, it is preferable to adopt a configuration in which suppression control is performed at the position of the vending machine on the left side and suppression control is not performed at the position of the vending machine on the left side.

[0024] (9) The control means has a function to suppress alarms based on radio waves received by the microwave receiving means based on input information from means other than the microwave receiving means, and the other means includes an imaging means capable of photographing the appearance of a device that emits microwaves that are a source of false alarms from the vehicle, and when there is something in the image captured by the imaging means that matches the characteristics of the appearance of a device that emits microwaves that are a source of false alarms that have been stored in advance, the control means may perform control to suppress the alarm. This approach allows for more accurate suppression and warning of alarms. As a source of false alarms, it is preferable to have at least one of the following: a vehicle that emits microwaves, particularly to understand its relationship with vending machines or other vehicles in front of or behind it.

[0025] The "appearance of a device that emits microwaves that serve as a pre-stored false alarm source" may include at least one of the appearances of a specific vending machine that emits microwaves or a specific vehicle that emits microwaves. At least one of the appearances of vending machines that do not emit microwaves other than the specific vending machine, or the appearances of vehicles that do not emit microwaves other than the specific vehicle, may be configured not to be detected in the video, or to not suppress the alarm even if they are detected in the video.

[0026] The "control to suppress the alarm when there is something in the image captured by the imaging means that matches the external appearance characteristics of a microwave-emitting device that is a false alarm source, which have been stored in advance" could, for example, mean that when there is something in the image that matches the external appearance characteristics of a microwave-emitting device that is a false alarm source, the alarm would not be issued or the sensitivity of the microwave receiving means would be reduced. For example, when the camera is photographing a vending machine, the alarm would not be issued and / or the sensitivity would be reduced.

[0027] (10) The imaging means is installed to be able to photograph the front of the vehicle, and the manner in which the alarm is suppressed is changed based on the position of the external features of the microwave-emitting device that is the source of the false alarm in the image captured by the imaging means. This approach allows for more accurate suppression and warning of alarms.

[0028] The "configuration for changing the manner of suppressing the alarm based on the position of the external features of the microwave-emitting device that is the source of the false alarm in the image captured by the imaging means" is such that, for example, when the position of the external features of the microwave-emitting device that is the source of the false alarm in the image captured by the imaging means corresponds to the front left side of the vehicle, the suppression is greater than when it corresponds to the front left side of the vehicle. A configuration for greater suppression would be, for example, to significantly reduce the sensitivity. The inventors have found that when the vending machine is on the left, the need to reduce false alarms is greater than when the vending machine is closer to the vehicle and on the right side, and this configuration can more effectively suppress false alarms.

[0029] (11) The control means has a function to suppress alarms based on radio waves received by the microwave receiving means based on input information from means other than the microwave receiving means, and the other means includes radio wave detection means for detecting radio waves other than microwaves emitted by a device that emits microwaves that are a source of false alarms, and when the radio wave detection means detects radio waves other than microwaves emitted by a device that emits microwaves that are a source of false alarms, it is preferable to perform control to suppress the alarm. This approach allows for more accurate suppression and warning of alarms. As a source of false alarms, it is preferable to have at least one of the following: a vehicle that emits microwaves, particularly to understand its relationship with vending machines or other vehicles in front of or behind it.

[0030] As a means of detecting radio waves, for example, a module that detects Wi-Fi and / or Bluetooth radio waves from a vending machine that emits microwaves would be suitable.

[0031] As for the "control to suppress the alarm when the radio wave detection means detects radio waves other than the microwaves emitted by a device that emits microwaves that are a source of false alarms," ​​for example, a list of SSIDs emitted from a WiFi module installed in a vending machine that emits microwaves can be stored in advance, and when microwaves are received, if WiFi radio waves of SSIDs included in that list are also received, the alarm can be suppressed.

[0032] As for the "control to suppress the alarm when the radio wave detection means detects radio waves other than microwaves emitted by a device that emits microwaves that are a source of false alarms," ​​for example, a list of beacon information emitted from a Bluetooth module installed in a vending machine that emits microwaves can be stored in advance, and when microwaves are received, if Bluetooth radio waves of beacon information included in the list are also received, the alarm can be suppressed. In particular, if there are identical models of devices that emit microwaves that are a source of false alarms that emit the same information using radio waves other than microwaves, it is good to store that identical information in a list or similar.

[0033] For example, the connection between a smartphone and a Coke ON vending machine is made wirelessly via Bluetooth. An internet connection is required for stamp issuance processing, and in this case, the vending machine communicates with the internet via the customer's smartphone. A radio wave detection means can be used to detect radio waves for this purpose. The radio wave detection means may also be configured to suppress the alarm when it receives unique information (such as a vending machine ID) emitted from an object other than the object to be alarmed, which is contained in the radio waves it detects. For example, if unique information is received, the alarm may not be sounded even if the above radio waves are received, and / or the sensitivity may be reduced. Alarm suppression can be done by reducing the sensitivity, canceling the alarm, or changing the content of the alarm. For example, it may be made to notify that there is a vending machine.

[0034] (12) The control means has a function to suppress alarms based on radio waves received by the microwave receiving means based on the characteristics of the radio waves received by the microwave receiving means, and at least one of the microwave receiving means or the control means is equipped with an SDR (Software Decoder), and the control means is configured to determine whether or not to suppress the alarm based on characteristic information of a waterfall image generated by the SDR and characteristic information of a waterfall image of the radar wave used to measure the vehicle speed when there is no false alarm source, which is stored in advance, as identification of the radio waves. This approach allows for more accurate suppression and warning of alarms.

[0035] A waterfall image is created by plotting the frequency of microwaves received by a microwave receiver on one axis (for example, the lower limit of the frequency band at one end of the axis and the upper limit of the frequency band at the other end of the axis), and the time axis on the other axis. The predetermined signal characteristics (e.g., signal strength) at a given frequency and time are plotted using predetermined colors (a first color (e.g., blue) for relatively weak signals and a second color (e.g., red) for relatively strong signals, with a gradient between the two). In this case, to obtain a wide dynamic range, each color corresponds to a respective signal characteristic (e.g., signal strength). It would be good to establish a relationship with it.

[0036] The "feature information of the radar wave waterfall image measuring the vehicle speed when there are no pre-stored false alarm sources" should be a pre-trained model trained using machine learning, where the waterfall image measuring the vehicle speed when there are no false alarm sources within a predetermined time range is designated as a warning target, and the waterfall image when there are false alarm sources within the predetermined time range is designated as a non-warning target. Machine learning is particularly well done using deep learning (DL), and especially using CNNs, and the pre-trained model should be a model trained by deep learning (especially a CNN configuration). For example, it should be composed of SDR waterfall + DL (CNN, etc.).

[0037] The configuration for determining whether or not to suppress the alarm based on the characteristic information of the waterfall image generated by the SDR and the characteristic information of the waterfall image of the radar wave measuring the vehicle speed when there is no false alarm source stored in advance is as follows: When microwaves are received, the waterfall image of the radar wave measuring the vehicle speed when there is no false alarm source within a predetermined time range is designated as an alarm target, and the waterfall image of the vehicle when there is a false alarm source within the predetermined time range is designated as a non-alarm target. If the result of inference using a machine learning trained model is determined to be an alarm target (for example, if the probability of being an alarm target is above a predetermined threshold), the alarm is issued without suppression, and if the result of the inference is determined to be a non-alarm target (for example, if the probability of being a non-alarm target is above a predetermined threshold), the alarm is suppressed. (13) The program should be a program for a computer to implement the functions of the control means of the system described in any of (1) to (12).

[0038] The inventions described in (1) to (12) above can be combined in any way. For example, one may combine all or part of the configuration of the invention described in (1) with at least part of the configuration of at least one of the inventions described in (2) and onward. In particular, it is preferable to combine the invention described in (1) with at least part of the configuration of at least one of the inventions described in (2) and onward. Alternatively, one may extract any configuration from the inventions described in (1) to (12) and combine the extracted configurations. The applicant of this application intends to obtain rights to inventions that include these configurations. Furthermore, even if there are descriptions such as "in the case of" or "when," these are not meant to be descriptions of configurations that are limited to those cases or times. These are merely examples of better configurations, and the applicant intends to obtain rights to configurations that do not fall under these cases or times. Also, even if there is a sequence of descriptions, it is not limited to that order. Configurations with some parts deleted or the order rearranged are also disclosed, and the applicant intends to obtain rights to them as well. [Effects of the Invention]

[0039] According to the present invention, it is possible to provide a system that is superior to conventional systems.

[0040] Furthermore, the effects of the present invention are not limited to those described herein. Effects derived from the components disclosed in this specification and the drawings are also disclosed, and the applicant intends to obtain rights to such components through divisional applications, amendments, etc. For example, phrases such as "can do" or "is possible" in this specification are descriptions that clearly indicate the effects to be achieved, and there are components that demonstrate effects even without such descriptions. Moreover, there are effects that can be grasped by the component even without such descriptions. [Brief explanation of the drawing]

[0041] [Figure 1] This figure shows the configuration of a navigation device having a radar detection function, which is a preferred embodiment of the device according to the present invention. [Figure 2] This is a block diagram of the navigation system. [Figure 3] This is an explanatory diagram showing an example of the display unit. [Figure 4] This figure shows an example of the display of the microwave reception alarm function setting screen. [Modes for carrying out the invention]

[0042] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Note that the embodiments described below are just one example of the present invention, and the content of the present invention should not be interpreted as being limited based on the following description.

[0043] Figure 1 shows an external view of a preferred embodiment of a navigation device equipped with a radar detection function and the system according to the present invention, Figure 2 shows a functional block diagram thereof, and Figure 3 shows an example of a display configuration. As shown in Figure 1, the navigation device comprises a portable device body 2 and a cradle 3 which is a mounting member that holds it. By attaching the device body 2 to the cradle 3, it functions as an in-vehicle navigation device, and by removing it from the cradle 3, it functions as a portable navigation device (PND) powered by a built-in battery. Of course, it is not necessary to adopt a configuration in which the device body 2 can be easily attached to and detached from the cradle 3 in this manner.

[0044] The main unit 2 is detachably attached to the cradle 3. The main unit 2 comprises a flat rectangular case body 4. A display unit 5 is located on the front of the case body 4, and a touch panel 8 is provided on the display unit 5 to detect which part of the display unit 5 is touched. Warning lamps 9 are provided on both sides of the front. The cradle 3 comprises a cradle body 6 that holds the main unit 2, and a base unit 7 that supports the cradle body 6 in any orientation at a predetermined location in the vehicle interior (such as the dashboard). The base unit 7 is fixed by suction cups on its bottom surface to adhere to the dashboard or the like. The base unit 7 and the cradle body 6 are connected via a connecting mechanism such as a ball joint so as to be rotatable within a predetermined angular range. Because it is a ball joint, the base unit 7 and the cradle body 6 can rotate relative to each other within any angular range in three dimensions, and the frictional resistance at the joint portion keeps them in place at any angular position. Therefore, the main unit 2 attached to the cradle body 6 can also be positioned in any orientation on the dashboard.

[0045] Furthermore, one side of the case body 4 is equipped with an SD memory card slot 21, into which an SD memory card 22 containing map data and other information can be inserted. A DC jack 10 is also provided on the side of the case body 4 where the SD memory card slot 21 is located. The DC jack 10 is for connecting a cigarette lighter plug cord (not shown), allowing power to be supplied by connecting to the vehicle's cigarette lighter socket via the plug cord.

[0046] On the other hand, the side opposite to the SD memory card slot 21 has a power switch and a USB connection port 23. By plugging one end of a USB cable into the connector of this USB connection port 23 and connecting the other end to a computer, software application updates can be performed. Also, during normal driving, by plugging a USB cable connected to the drive recorder 26 into the connector of this USB connection port 23, the control unit 18 can acquire video data captured by the drive recorder 26. The drive recorder 26 should be installed, for example, on the upper part of the windshield with its camera facing forward so that the shooting area is in front of the vehicle.

[0047] The following devices and components are arranged inside the case body 4. A microwave receiver 11 is located inside the rear side of the case body 4. The microwave receiver 11 receives microwaves in a predetermined frequency band★ that includes the frequency of the radar waves used to measure the vehicle's speed, and detects the signal level of the received microwaves when it receives microwaves within the set predetermined frequency range. Specifically, it uses the RSSI voltage, which corresponds to the signal level and electric field strength. The predetermined frequency band mentioned above is, for example, the frequency band that includes the frequency of microwaves emitted from a vehicle speed measuring device.

[0048] Furthermore, a GPS receiver 12, which receives GPS signals and determines the current location, is located inside the top of the case body 4. An infrared communicator 14 is located inside the front of the case body 4. The infrared communicator 14 transmits and receives data with communication devices that have a built-in infrared communicator, such as a mobile phone 15. In addition, a speaker 20 is also built into the case body 4.

[0049] Furthermore, the device of this embodiment includes a wireless receiver 13 and a remote control receiver 16. The wireless receiver 13 receives incoming wireless signals of a predetermined frequency. The remote control receiver 16 communicates data with the remote control (portable unit: slave unit) 17 and performs various settings on the device. The wireless receiver 13 receives incoming wireless signals of a predetermined frequency band. This predetermined frequency is, for example, the frequency band used by emergency vehicles to notify base stations of their vehicle's position.

[0050] Furthermore, the device of this embodiment includes a Bluetooth module 24 for performing Bluetooth communication by transmitting and receiving Bluetooth wireless signals, and a WiFi module 25 for performing WiFi communication by transmitting and receiving WiFi wireless signals.

[0051] The navigation device of this embodiment is connected via a connection cable to a drive recorder installed on the top of the windshield to capture images of the area in front of the vehicle, and the control unit 18 has a function to perform control to suppress warnings based on the video information captured by the drive recorder.

[0052] In addition to the navigation function, the navigation device of this embodiment also includes a target detection function as a target detection device that detects targets such as vehicle speed measuring devices and other traffic monitoring points. All of these functions, including the navigation function and the target detection function, are stored on the EEPROM of the control unit 18 as a program to be executed by the computer in the control unit 18, and are realized when the computer in the control unit 18 executes this program.

[0053] In other words, the control unit 18 controls the various input devices (GPS receiver 12, microwave receiver 11, wireless receiver 13, touch panel 8, remote control receiver 16, etc.), performs predetermined processing based on the information input from the various input devices, and controls output devices (display unit 5, alarm lamp 9, speaker 20, etc.) to output predetermined information, alarms, and messages. This predetermined processing is for executing each of the above functions, and accesses the database 19 and SD memory card 22 as needed.

[0054] The database 19 can be implemented using a non-volatile memory (such as an EEPROM) located within the microcontroller of the control unit 18 or externally connected to the microcontroller. The database 19 initially contains information necessary for detecting certain targets, maps, and other targets, as well as a list of vending machine location information, a list of Bluetooth beacon information emitted by vending machines, and a list of WiFi SSID information emitted by vending machines. Any data added afterward can be updated through a predetermined process. This update process may involve, for example, inserting an SD memory card containing the additional data into the SD memory card slot 21 and transferring the data from the SD memory card to the database 19. This data update can also be performed using an infrared communication device 7 or a personal computer or other external device connected via the USB terminal 23.

[0055] The control unit 18, which implements the target detection function, operates as follows: When the microwave receiver 11 receives microwaves, the control unit 18 controls the output of a predetermined alarm (microwave alarm). This alarm may include a buzzer using the speaker 20, an audio output to indicate microwave reception (such as detection by a vehicle speed measuring device), or a message using text or an image on the display unit 5.

[0056] Furthermore, when the wireless receiver 13 receives a desired wireless signal, the control unit 18 outputs a predetermined alarm (wireless alarm). This alarm may include a buzzer sound using the speaker 20, an audio output to indicate the reception of microwaves (such as the approach of an emergency vehicle), or a message using text or images displayed on the display unit 5. It is preferable that the form of the alarm associated with wireless reception and the alarm associated with microwave reception described above be different.

[0057] Furthermore, the control unit 18 outputs a predetermined alarm (GPS alarm) when the current position detected by the GPS receiver 12 and the position of a target object such as a traffic monitoring point stored in the database 19 are in a predetermined positional relationship. For this reason, the database 19 contains information about the detected target object (location information of the target object including longitude and latitude, and type information of the target object, etc.), traffic safety information to drive more carefully and safely, such as accident-prone areas and traffic enforcement information, and various information useful for driving, such as landmarks. Each piece of information is registered in association with location information and specific information types (type of target object, type of traffic enforcement, accident-prone area, name of landmark, etc.).

[0058] The distance to the target object when issuing a warning can be changed depending on the type of target object. As with the above, the warning can be issued in the form of an audio warning using the speaker 20 or the display unit 5. Figure 3 shows an example of a warning issued by the display unit 5. In this embodiment, since the device is a navigation device and therefore has map data, the control unit 18 has the function of reading road network information around the current location and displaying a map of the area around the current location on the display unit 5 as the basic screen. The warning screen 70 is then displayed on the display unit 5 overlaid on the currently displayed screen (in this case, the map of the area around the current location). Figure 3 shows an example of the warning screen 70 being displayed when the distance between the current location and an LH system, a type of speed measuring device that is one of the traffic monitoring points, is 500m while the map 50 is displayed. Furthermore, the device outputs a warning voice message from the speaker 20 indicating the type of warning and the distance, such as "LH system 500m ahead."

[0059] On the other hand, in order to implement the navigation function, the control unit 18 performs the following operations. First, the database 19 stores road network information for navigation. The navigation information stored in this database 19 may include all information for the entire country at the time of shipment, or map data etc. may be provided on SD memory cards 22 for each region, and the user may prepare an SD memory card containing the necessary map data etc. and insert it into the SD memory card slot 21 for use. Note that the map data etc. stored on the SD memory card 22 may be transferred and stored in the database 19, or the control unit 18 may access the SD memory card 22 and read it from there for use.

[0060] The control unit 18 has the function of reading road network information around the current location from the database 19 and displaying a map of the area around the current location on the display unit 5. This control unit 18 can use this road network information to search for a route from one location to another. The database 19 also includes a telephone number database that stores telephone numbers associated with the location information and names of residences, companies, facilities, etc. associated with those telephone numbers, and an address database that stores addresses associated with the location information of those addresses. The database 19 also stores location information of traffic monitoring points, such as speed measuring devices, along with their types. Furthermore, the control unit 18 has the function of performing general navigation device processing.

[0061] For example, the display unit 5 displays a map of the area around the current location and displays a destination setting button. The control unit 18 performs a destination setting process when it detects a press on the touch panel 8 at a location corresponding to the display position of the destination setting button. In the destination setting process, a destination setting menu is displayed on the display unit 5, prompting the user to select a method for setting the destination. The destination setting menu has a phone number search button and an address search button that prompt the user to select a method for setting the destination. When it is detected that the phone number search button has been pressed, a phone number input screen is displayed, and location information corresponding to the entered phone number is obtained from the database 19. When it is detected that the address search button has been pressed, an address selection input screen is displayed, and location information corresponding to the entered address is obtained from the database 19. Then, the obtained location information is set as the destination location information, and a recommended route from the current location to the destination is determined based on the road network information stored in the database 19. The road network information is the same data as that of existing car navigation systems. For example, the system may include multiple road links connecting points such as intersections. Each road link may contain information such as its ID, whether it is one-way or not, the coordinates of the latitude and longitude of the starting and ending points (each node), a list of IDs of the road links connected to the starting and ending points, and the type of road, such as whether it is a highway or a regular road. For calculating the recommended route, a known method such as Dijkstra's algorithm can be used.

[0062] Furthermore, for example, route guidance is provided based on a recommended route. That is, when the current location acquired by the GPS receiver 12 approaches a predetermined distance from a branching point on the recommended route, it has a route guidance function that guides the user in the direction of the recommended route. For example, when the recommended route involves a right turn 300m from the current location, the system outputs a voice message from the speaker 20 saying "Turn right in 300m" and displays a right arrow on the map.

[0063] Furthermore, the control unit 18 of this navigation device has a function to suppress microwave-based alarms received by the microwave receiver 11, based on at least one of the following: limiting the reception sensitivity of the microwave receiver 11, the characteristics of the radio waves received by the microwave receiver 11, the frequency of the radio waves received by the microwave receiver 11, the characteristics of the location where the microwave receiver 11 received the signal, video data received from the drive recorder 26 connected via the USB connection unit 23, Bluetooth beacon signals emitted by the vending machine received by the Bluetooth module 24, and WiFi SSID information emitted by the vending machine received by the WiFi module 25.

[0064] The choice of which suppression to perform is made on the microwave reception alarm function setting screen shown in Figure 4. The microwave alarm suppression function setting screen in Figure 4 is displayed when the touch panel 8 detects a continuous 2-second touch on a predetermined area on the map screen. The predetermined area is the lower left area of ​​the map screen, which is divided into three equal parts vertically and four equal parts horizontally. The map screen is the default screen displayed when the startup process of this device is completed. The system also transitions to displaying the map screen when there is no operation for 5 minutes on any of the setting screens, when the back button is pressed, or when the setting complete button is pressed.

[0065] As shown in Figure 4, the microwave reception alarm function setting screen has the title "Microwave Reception Alarm Function Setting Screen" displayed at the top, the title "Alarm Suppression Target Items" displayed below it, and seven checkboxes and their names, which will be described later, displayed below that, and the title "Alarm Suppression Method" displayed below it, and three radio buttons and their names, which will be described later, displayed below that. Below that, there is a cancel button with the text "Cancel" on the left and a settings button with the text "Set" on the right. When switching from the map screen to the microwave reception alarm function setting screen, the current microwave reception alarm function settings are read from the database 19 and reflected in the display state of each checkbox and radio button. If the touch panel 8 detects that the cancel button has been pressed after the user has changed the state of the checkboxes or radio buttons, the display returns to the map screen with the previous settings without reflecting the change in the state of the checkboxes or radio buttons. When the touch panel 8 detects that the setting button has been pressed, the state of the checkbox and radio button at the time of touch detection is stored in the database 19 as a new setting and used for alarm suppression processing. In other words, if the checkbox is checked, the suppression processing of the items stored in the database 19 is performed in a multitasking manner during microwave alarm processing. If all items are unchecked, no suppression processing is performed during alarm processing, and a microwave alarm is issued when the microwave receiver 11 receives a microwave.

[0066] The seven items designated as "items subject to alarm suppression" are, from top to bottom, "suppression by limiting microwave reception sensitivity," "suppression by the characteristics of the received microwave radio waves," "suppression by the frequency of the received microwave radio waves," "suppression by the characteristics of the location where the microwave is received," "suppression by video data received from a dashcam," "suppression by Bluetooth beacon signals emitted by vending machines," and "suppression by WiFi SSID information emitted by vending machines." Each item name is displayed, and a checkbox that can be toggled on or off is provided to the left of each item name.

[0067] As the three items of the "Alarm Suppression Method", in order from the top, there are the items of "Do not give voice alarms during suppression", "Do not give all alarms during suppression", and "Do not give all alarms during suppression but display the suppression items", and there are radio buttons for selecting any one of these three items. In the following parts where "Suppress" and the suppression process are described, based on the information in the database 19 that stores the setting status of these radio buttons, it is determined which of these three items to perform suppression on and the suppression described in that item is performed. For example, when the state of "Do not give voice alarms during suppression" is selected, as the suppression process, a process of muting the voice output to the speaker 20 is performed. As a result, even if a signal in which the microwave receiver 11 is receiving microwaves is input to the control unit 18, no voice alarm for the microwave alarm will be given. Thus, only the alarm on the screen will be given. When the state of "Do not give all alarms during suppression" is selected, as the suppression process, a process of muting the voice output to the speaker 20 and a process of canceling the display of the alarm screen on the display unit 5 are performed. As a result, for example, if the reception of microwaves starts after the start of the suppression process and ends before the end of the suppression process, no alarms will be given during this microwave reception period. After the microwaves are received, if the suppression process starts during the reception, an alarm will be given once, but the alarm will stop when the suppression process starts. When the state of "Do not give all alarms during suppression but display the suppression items" is selected, as the suppression process, a process of muting the voice output to the speaker 20, canceling the display of the alarm screen on the display unit 5, and a process of overlapping and displaying a character string with "In progress" added to the end of the item name for which suppression was performed on the map screen are performed. For example, when performing the suppression process of "Suppression by video data received from the drive recorder", the character string "Suppression by video data received from the drive recorder in progress" is displayed in front of the map.If multiple items are checked among the seven checkboxes, the timing of suppression by the suppression process for each item may differ. However, since each suppression process is performed using multitasking, the content of each suppression is displayed while it is being executed. Therefore, the position where the text is displayed during suppression in each suppression process is predetermined to be different. In this embodiment, the display position and content of the seven item names in Figure 4 are displayed on top of the map in Figure 3, taking priority over the map and alarm screen. However, for example, an alarm suppression content display position adjustment process may be performed to adjust the display position of the currently suppressed alarm within the alarm screen exemplified in Figure 3.

[0068] (1) If the control unit 18 stores in the database 19 that the item "Limited suppression of microwave reception sensitivity" is checked on the microwave reception alarm function setting screen in Figure 4, it sends a signal to the microwave receiver 11 that lowers the reception sensitivity level compared to when the item is not checked. When the microwave receiver 11 receives this signal, it reduces the reception sensitivity.

[0069] (2) If the database 19 stores that the item "Suppression based on the characteristics of the received microwave" is checked on the microwave reception alarm function setting screen in Figure 4, the control unit 18 determines whether the modulation method of the received signal input from the microwave receiver 11 to the control unit 18 is FSK modulation. If it is FSK modulation, the control unit does not suppress the microwave alarm; if it is not FSK modulation, the control unit suppresses the microwave alarm. Whether or not it is FSK modulation can be determined by known configurations, such as the configuration disclosed in Japanese Patent Application Publication No. 2017-96728.

[0070] In this way, alarms caused by unmodulated microwaves emitted by, for example, vending machines can be suppressed, as can alarms caused by StepFM-modulated microwaves emitted by the vehicle itself or other vehicles.

[0071] (3) The control unit 18 has a function to sweep the receiving frequency of the microwave receiver 11. The sweep frequency range includes the microwave frequencies emitted by vending machines and microwave frequencies emitted by other vehicles. If the database 19 stores that the item "Suppression at the frequency of the received microwave" is checked in the microwave reception alarm function setting screen of Figure 4, the control unit 18 will suppress the alarm if the receiving frequency set for the microwave receiver 11 deviates from the range of frequencies emitted by a specific speed measuring device that is stored in the database 19 in advance. In other words, when microwaves are received within the range of frequencies pq emitted by a specific speed measuring device that is inside the sweep frequencies a and b, the alarm will not be suppressed, but when microwaves are received between a and ap and between q and b, the alarm will be suppressed.

[0072] In this way, alarms based on microwaves that deviate from the frequency range of the speed measuring device can be suppressed. This is particularly effective when the microwave receiver 11 or control unit 18 is equipped with a function to scan (sweep) the received frequency of the microwave receiver 11 within a predetermined frequency range, as in this embodiment. That is, the sweep range remains unchanged, and alarm suppression can be easily performed without changing various timing controls. This is particularly useful for microwaves from false alarm sources that do not overlap with the frequency range of a particular speed measuring device but are within a predetermined frequency range. The received frequency may be a frequency corresponding to a control value for scanning, or a frequency counter may be provided to separately measure the frequency of the received radio waves. Furthermore, the scanning (sweeping) of the received frequency may include a function to scan a range in which the frequency of the radio waves includes the respective frequency ranges emitted by different types of speed measuring devices, while skipping the range that deviates from the frequency range of all of those different types of devices. In this way, alarms based on microwaves that deviate from the frequency range of the speed measuring device can be suppressed.

[0073] (4) The control unit 18, if it has stored in the database 19 that the "Suppression based on the characteristics of the location where microwaves are received" item is checked on the microwave reception alarm function setting screen in Figure 4, will suppress the alarm if the current location of the vehicle obtained from the GPS receiver 12 approaches any of the locations in the list of vending machine location information stored in the database 19.

[0074] This method can suppress false alarms caused by microwaves emitted by vending machines. For example, since the location of a vending machine is publicly available on a sales promotion app for the vending machine, the system can store that location and suppress the alarm when microwaves are received while approaching that location.

[0075] Furthermore, the control unit 18 may also perform control to lower the reception sensitivity of the microwave receiver 11 during this suppression. In this way, false alarms caused by microwaves emitted by vending machines can be suppressed. It is preferable that the control to lower the reception sensitivity of the microwave receiver 11 during this suppression is performed in addition to the suppression that is remembered when the "Suppression limited to microwave reception sensitivity" item is checked.

[0076] Furthermore, since the locations of vending machines are publicly available on apps used to promote vending machines, it is advisable to store these locations and configure the system to reduce the microwave reception sensitivity when microwaves are received while approaching a vending machine's location. It is also advisable to store only the locations of vending machines installed along roads in database 19, excluding other locations. This prevents alarms from being suppressed due to approaching a vending machine located elsewhere. Alternatively, database 19 could store the locations of vending machines regardless of whether they are located along roads, and the system could be configured not to register an approach as "approaching" if the location is far from the road network data's location information.

[0077] Furthermore, the control system may be configured to differentiate the degree of suppression depending on whether the location of the vending machine stored in the database 19 is on the right or left side in the direction of travel of the vehicle. This would allow for more accurate suppression and warning. For example, when the sensitivity is controlled to receive radio waves from vending machines on both sides of the road in the direction of travel, suppression control would be applied to vending machines on both sides. When the sensitivity is controlled to receive only radio waves from the vending machine on the left, suppression control would be applied to the vending machine on the left side, but no suppression control would be applied to the vending machine on the left side.

[0078] (5) If the database 19 stores that the item "Suppression by video data received from the drive recorder" is checked on the microwave reception alarm function setting screen in Figure 4, the control unit 18 receives the video data transmitted from the drive recorder 26 via the USB connection unit 23, and if it determines that there is something in the received video data that matches the external characteristics of a device that emits microwaves that would be a source of a false alarm, it suppresses the microwave alarm.

[0079] As a source of false alarms, characteristic information of vehicles emitting microwaves to understand the relationship between the vending machine and other vehicles in front of and behind it (a trained model trained using a CNN with drive recorder footage including the vending machine and the vehicle in question) is stored in database 19. The trained model is read into RAM, and the received video data is input to the trained model to perform inference. As a result of this inference, the probability of the vending machine being present and the probability of the vehicle being present are obtained from the video data. If the probability of the vending machine being present is above a predetermined value (e.g., 80% or more), it is determined that there is something corresponding to the external characteristics of the vending machine. If the probability of the vehicle being present is above a predetermined value (e.g., 80% or more), it is determined that there is something corresponding to the external characteristics of the vehicle.

[0080] Furthermore, the control unit 18 may suppress the detection of a device that emits microwaves, which are the source of false alarms, more significantly when the location of the device corresponding to the external features of the device in the video captured by the drive recorder 26 is located on the front left side of the vehicle than when it is located on the front left side of the vehicle. For example, a configuration that significantly suppresses detection can be achieved by greatly reducing the sensitivity. The inventors have found that there is a greater need to reduce false alarms when the vending machine is on the left side than when it is closer to the vehicle and on the right side, and this method can more effectively suppress false alarms.

[0081] (6) If the database 19 has a checkmark next to the item "Suppression by Bluetooth beacon signals emitted by vending machines" on the microwave reception alarm function setting screen in Figure 4, the control unit 18 will determine whether the Bluetooth beacon signal received by the Bluetooth module 24 matches any of the items in the list previously stored in the database 19, and if it matches, it will perform control to suppress the microwave alarm.

[0082] (7) If the database 19 has a checkmark next to the item "Suppression of WiFi SSID information emitted by vending machines" on the microwave reception alarm function setting screen in Figure 4, the control unit 18 will determine whether the SSID received by the WiFi module 25 is one of the SSIDs in the list previously stored in the database 19, and if it is, it will perform control to suppress the microwave alarm. By following the methods described in (6) and (7) above, alarm suppression and alarms can be issued more accurately.

[0083] Furthermore, the connection between the customer's smartphone and the vending machine is made wirelessly via Bluetooth. Internet connectivity is required for the process of awarding stamps to customers who purchase beverages from the vending machine using a smartphone app, and in this case, the vending machine communicates with the internet via the customer's smartphone. It would be even better to determine whether the Bluetooth signal is for this purpose or not. Additionally, the control unit 18 may suppress an alarm when it determines that it has received unique information (such as a unique ID) emitted from the vending machine or the vehicle.

[0084] (8) In the above-described embodiment, an example was given using a microwave receiver 11 that has been sold commercially. However, the microwave receiver 11 and the control unit 18 may be configured as a software-defined radio. For example, the microwave receiver 11 may be configured to output a so-called IQ signal (for example, the microwave receiver 11 may be a microwave receiver similar to the receiving circuit described in Japanese Patent Application Publication No. 2019-61643). The control unit 18 takes in this IQ signal as IQ data using an AD converter provided in the control unit 18, and the control unit 18 generates a so-called waterfall image from the input IQ data as part of the SDR processing. Based on the characteristic information of this waterfall image and the characteristic information of the waterfall image of the radar wave measuring the vehicle speed when there is no false alarm source, which is stored in the database 19 in advance, the control unit 18 decides whether or not to suppress the alarm. The waterfall image is drawn with the frequency of microwaves received by the microwave receiver 11 as one axis (for example, the lower limit of the frequency band at one end of the axis and the upper limit of the frequency band at the other end of the axis), and the time axis as the other axis. The predetermined signal characteristics (e.g., signal strength) at the given frequency and time are drawn with predetermined colors (a first color (e.g., blue) when the signal is relatively weak, and a second color (e.g., red) which is different from the first color when the signal is relatively strong, with a gradient between the two). The relationship between each color and its corresponding signal characteristics (e.g., signal strength) is set up to obtain a wide dynamic range.

[0085] Furthermore, the feature information of the radar wave waterfall image measuring the vehicle speed when there are no pre-stored false alarm sources should be a pre-trained model trained using machine learning, where the waterfall image measuring the vehicle speed when there are no false alarm sources within a predetermined time range is designated as a warning target, and the waterfall image when there are false alarm sources within a predetermined time range is designated as a non-warning target. Machine learning is particularly well done using deep learning (DL), and especially using CNNs, and the pre-trained model should be a model trained using deep learning (especially one that is a CNN configuration). For example, it should be constructed using SDR waterfall + DL (CNN, etc.).

[0086] In a configuration that determines whether or not to suppress an alarm based on the feature information of the waterfall image generated by the SDR and the feature information of the radar wave waterfall image measuring the vehicle speed when there are no false alarm sources stored in advance, when microwaves are received, the radar wave waterfall image measuring the vehicle speed when there are no false alarm sources within a predetermined time range is designated as an alarm target, and the waterfall image when there are false alarm sources within a predetermined time range is designated as a non-alarm target. If the result of inference using a machine learning trained model determines that it is an alarm target (for example, if the probability of it being an alarm target is above a predetermined threshold), an alarm is issued without suppression, and if the result of the inference determines that it is a non-alarm target (for example, if the probability of it being a non-alarm target is above a predetermined threshold), the alarm is suppressed. For example, this suppression process may be the same as the process described in (5) above. (9) Summary

[0087] According to the embodiments described above, it is possible to provide users with a radar detection function that is superior to that of conventional systems. For example, when a vehicle equipped with this device approaches a vending machine that emits microwaves, which have recently become a problem as a source of false alarms, or a vehicle that emits microwaves to determine its relationship with other vehicles in front of or behind it, the number of false alarms can be reduced compared to conventional systems. In the same frequency range as the microwaves emitted from speed measurement systems, there are microwaves emitted by vending machines for human detection, etc., and microwaves emitted by vehicles to determine their relationship with other vehicles in front of or behind them, and the problem of issuing alarms based on the reception of these is becoming increasingly significant, but it is possible to further reduce such problems.

[0088] In particular, the limitation of the reception sensitivity of the microwave receiver 11, the characteristics of the radio waves received by the microwave receiver 11, the frequency of the radio waves received by the microwave receiver 11, the characteristics of the receiving location of the microwave receiver 11, and the suppression of alarms based on input information from the drive recorder 26, Bluetooth module 24, and WiFi module 25 (which are not the microwave receiver 11) are performed to detect microwaves emitted by vending machines or vehicles to understand their relationship with other vehicles in front of and behind them. Compared to conventional automatic doors, vending machines are designed for unmanned sales and are therefore installed in large numbers in suburban areas where speed enforcement is likely to occur. Furthermore, vehicles that emit microwaves to understand their relationship with other vehicles in front of and behind them are themselves in motion, so they have the unprecedented characteristic that it is uncertain where they will be detected. With a configuration like that of this embodiment, problems such as constant alarms due to vending machines or such vehicles being annoying and making it difficult to hear the original alarm can be mitigated. In addition, the problem of drivers switching to a setting that does not emit alarms because of the constant alarms due to vending machines or such vehicles, thus preventing the original speed enforcement radar from sounding, can also be solved. This system makes it possible to avoid false alarms caused by microwaves from vending machines or vehicles that interfere with their intended use, while still ensuring that genuine alarms are properly issued.

[0089] According to this embodiment, it is possible to set the system so that no alarm is issued, or to set the system so that the alarm is issued in a manner that is less noticeable than when the alarm is not suppressed, such as by only displaying an alarm on the screen and not issuing an audible alarm.

[0090] Furthermore, when the alarm is configured to be sound-based, the suppression of the alarm may be made less loud than when the alarm is not suppressed. For example, when the alarm is displayed on a screen, the size of the alarm display may be made less conspicuous than when the alarm is not suppressed (for example, by displaying it in a smaller size). Sound and

[0091] As for suppressing alarms, as in this embodiment, the sensitivity may be reduced, the alarm may be canceled, or the content of the alarm may be changed. Alternatively, the system may notify the user by displaying on the display unit 5 that there is a source of false alarms (e.g., a vending machine). It is preferable to have a configuration that can identify the type of source of false alarms, as in (5), (6), and (7) of the embodiment, and to further display on the display unit 5 the type of source of false alarms that has been identified (e.g., "Detecting a vending machine that is a source of false alarms" or "Detecting a vehicle that is a source of false alarms").

[0092] Furthermore, the scope of the present invention is not limited to the configurations explicitly described in the specification, but also includes combinations of various aspects of the present invention disclosed herein. While the configurations for which patent protection is sought are specified in the appended claims, we intend to include configurations disclosed herein that are not currently specified in the claims in the future.

[0093] The present invention is not limited to the configuration described in the embodiments above. The components of each embodiment and modification described above can be arbitrarily selected and combined. Furthermore, any component of each embodiment and modification can be arbitrarily combined with any component described in the means for solving the invention, or any component that embodies any component described in the means for solving the invention. The present application intends to obtain rights to these as well through amendments or divisional applications. Even if there is a description such as "in the case of..." or "when...", it is not meant to be a configuration that is limited to that case or time. Configurations that do not fall under these cases or times are also disclosed, and the present application intends to obtain rights to them. Also, even if there is a sequence of descriptions, it is not limited to that order. Configurations with some parts deleted or the order rearranged are also disclosed, and the present application intends to obtain rights to them.

[0094] Furthermore, by converting to a design registration application, we intend to acquire rights to the overall design or a partial design. The drawing depicts the entire device with solid lines, but it is a drawing that includes not only the overall design but also partial designs claimed for parts of the device. For example, it is a drawing that includes not only a partial design for a part of the device's components, but also a partial design for a part of the device regardless of its components. A part of the device may be a component of the device, or a part of a component. We intend to acquire rights not only to the overall design, but also to a partial design where any part of the solid lines in the drawing is represented by dashed lines. In addition, all modules, components, and parts inside the device's casing that are shown in the drawing are independently tradable, and similarly, we intend to acquire rights to them by converting to a design registration application. [Explanation of Symbols]

[0095] 2. Main unit of the device 3 Cradles 4. Case body 5 Display section 6. Cradle body 7. Base 8 Touch panel 9. Alarm lamp 11 Microwave receiver 12 GPS receivers 13 Wireless receiver 18 Control Unit 19 Databases 20 speakers 21 SD memory card slot 22 SD memory cards 23 USB connection 24 Bluetooth modules 25 WiFi modules 26. Dashcam

Claims

1. A radar detector equipped with a function that uses a machine learning-trained model to determine whether the received radar wave is a warning target, The microwave receiver outputs an IQ signal. The control unit captures the IQ signal as IQ data using an AD converter, and performs SDR processing on the IQ data. The SDR processing described above generates a waterfall image, A radar detector that, upon receiving microwaves, uses a pre-trained machine learning model to perform inference based on the feature information of the waterfall image generated by the SDR and the feature information of the waterfall image of the radar wave measuring the vehicle's speed when there are no false alarm sources stored in advance. If the result of the inference determines that the object is subject to a warning, the alarm is issued without suppression; if it is determined that the object is not subject to a warning, the alarm is suppressed.

2. The radar detector according to Claim 1, characterized in that the trained model is a model trained by deep learning, and the training was performed on a CNN.

3. The radar detector according to claim 1 or 2, characterized in that if the probability that the result of the inference is that the item is subject to alarm is above a predetermined threshold, an alarm is issued without suppressing the alarm, and if the probability that the result of the inference is that the item is not subject to alarm is above a predetermined threshold, an alarm is suppressed.

4. The radar detector according to any one of claims 1 to 3, characterized in that the waterfall image is drawn with the frequency of microwaves received by the microwave receiving unit as one axis and the time axis as the other axis, and a predetermined signal characteristic at that frequency and time as a predetermined color.

5. A program for a computer to implement the functions of a radar detector as described in any one of claims 1 to 4.

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