Detector and speed measurement and detection method

Abstract

To allow more appropriate detection even with a speed measurement device that radiates a plurality of types of radar waves different in frequency band.SOLUTION: A detector 1 has: a plurality of first and second radar wave receiving units 4, 5 for each frequency band to receive a plurality of types of radar waves in the frequency bands radiated by a speed measurement device; a notification unit 13 that notifies predetermined information; and a control unit 20 that controls the notification unit 13 to perform notification on the basis of a result of reception performed by one of the first and second radar wave receiving units 4, 5 on the basis of information set in advance.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a detector and a speed measurement detection method. [Background technology]

[0002] Conventionally, a detector has been proposed that detects a speed measurement device that measures the speed of a vehicle by emitting radar waves (Patent Document 1). The detector detects the speed measurement device by receiving the radar waves emitted by the speed measurement device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-139870 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in recent years, there have been speed measurement devices that emit multiple types of radar waves with different frequency bands. In this case, if the detector is designed to receive radar waves of only one specific frequency band, it will not be able to detect speed measurement devices that emit radar waves of other frequency bands.

[0005] An object of the present invention is to enable more appropriate detection even with a speed measurement device that irradiates a plurality of types of radar waves having different frequency bands. [Means for solving the problem]

[0006] In order to solve the above problem, a first aspect of the present invention is a detector installed in a vehicle, the detector having a plurality of receiving means for each frequency band for receiving radar waves of a plurality of frequency bands emitted by a speed measuring device, an alarm means for alarming predetermined information, and a control means for causing the alarm means to alarm based on the reception result of any of the plurality of receiving means on the basis of preset information.

[0007] In a second aspect of the present invention, it is preferable that the vehicle further comprises a position detection means for detecting the position of the vehicle, and the control means issues an alert by the alert means from the reception result of any of the plurality of receiving means based on a comparison result between preset position information and the position information detected by the position detection means.

[0008] In the third aspect of the present invention, it is preferable that the control means causes the notification means to perform notification based on a reception result from any one of the plurality of receiving means on the basis of preset time information.

[0009] In the fourth aspect of the present invention, it is preferable that the control means causes the notification means to perform notification from a reception result of any one of the plurality of receiving means based on information set in advance by a user.

[0010] In order to solve the above-mentioned problems, a fifth aspect of the present invention is a speed measurement detection method using a detector installed in a vehicle, the detector having a plurality of receiving means for each frequency band for receiving radar waves of a plurality of frequency bands emitted by a speed measurement device, selecting one receiving means from the plurality of receiving means based on preset information, and reporting predetermined information from a reporting means based on the reception result of the selected receiving means. Effect of the Invention

[0011] According to the first and fifth aspects of the present invention, the detector can give a report based on the reception result of one of the more appropriate receiving means among the multiple receiving means.

[0012] In addition, since the detector issues an alert based on the reception result of one receiving means, it is possible to operate only one receiving means and issue an alert based on its reception result, and the one receiving means is not interfered with by the operation of other receiving means, and the detector can issue an alert with high accuracy based on the reception result of one receiving means.

[0013] Furthermore, it is possible to use a single receiving means to scan and receive radar waves of multiple frequency bands, but this would result in a delay in detecting radar waves because radar waves of a wide range of frequency bands are scanned. In contrast, the detector of the present invention prevents delays in detecting radar waves caused by scanning operations because each receiving means receives radar waves of its own assigned frequency band.

[0014] According to the second aspect of the present invention, the detector can give a report based on the reception result of one more appropriate receiving means selected from among the plurality of receiving means based on the vehicle position.

[0015] According to the third aspect of the present invention, the detector can issue a report based on the reception result from one appropriate receiving means among the multiple receiving means based on time information.

[0016] According to the fourth aspect of the present invention, the detector can issue a report based on the reception result of one appropriate receiving means among a plurality of receiving means, according to user settings. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a diagram showing an example of the external configuration of a detector. [Diagram 2] FIG. 2 is a block diagram showing an example of the configuration of a detector. [Diagram 3] FIG. 3 is a diagram showing the relationship between the first and second frequency bands of radar waves. [Figure 4] FIG. 4 is a block diagram illustrating an example of the configuration of the notification control unit. [Diagram 5] FIG. 5 is a flowchart of an example of processing performed by the switching determination unit. [Figure 6] FIG. 6 is a flowchart of a process example of control upon reception of the first radar wave. [Figure 7] FIG. 7 is a flowchart of a process example of control upon reception of the second radar wave. [Figure 8]FIG. 8 is a flowchart of an example of processing performed by the first radar wave notification control unit. [Figure 9] FIG. 9 is a flowchart of an example of processing performed by the second radar wave reporting control unit. [Figure 10] FIG. 10 is a flowchart of a process example of control based on reception of the first and second radar waves. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In this embodiment, a detector that detects a speed measurement device that measures the speed of a vehicle by emitting radar waves is given as an example. The detector is installed in a vehicle such as an automobile, a truck, or a bus.

[0019] (composition) FIG. 1 is a diagram showing an example of the external configuration of a detector 1. As shown in FIG.

[0020] 1, the detector 1 has a main body section 2 and a separate section 3. The main body section 2 and the separate section 3 have radar wave receiving sections 4 and 5, respectively.

[0021] The main body 2 has a thin, substantially rectangular parallelepiped housing and has a first radar wave receiving unit 4 on the front side. The main body 2 has a display 6 and the like on the back side 2a. The main body 2 also has a speaker (not shown). Here, the display 6 is a touch panel that allows the user to perform various operations on the detector 1 and displays various information including notification information such as alarms. The speaker also outputs various information including notification information such as alarms by voice. The main body 2 is installed near the windshield inside the vehicle cabin so that the first radar wave receiving unit 4 faces the front of the vehicle. The area near the windshield inside the vehicle cabin is an example of a place where it is easy to receive radar waves emitted by the speed measurement device and where information can be notified to the driver.

[0022] The separate unit 3 has a thin, roughly rectangular parallelepiped housing smaller than the main unit 2, and has a second radar wave receiving unit 5 on its front surface 3a. The separate unit 3 is capable of communicating with the main unit 2 wirelessly or via wire. The separate unit 3 transmits the reception result of the second radar wave receiving unit 5 to the main unit 2. The separate unit 3 is installed near the windshield inside the vehicle, for example, on the driver's seat or passenger's seat side, with the second radar wave receiving unit 5 facing forward of the vehicle.

[0023] FIG. 2 is a block diagram showing an example configuration of the detector 1.

[0024] As shown in FIG. 2, the detector 1 has a first radar wave receiving unit 4, a second radar wave receiving unit 5, a positioning signal receiving unit 11, a user setting input unit 12, a control unit 20, and a notification unit 13. Speed ​​measuring devices detected by the detector 1 include radar types that radiate radar waves and non-radar types that have a loop coil or a photocell, and radar speed measuring devices are of fixed and mobile types. The detector 1 notifies information encouraging speeding by direct or indirect content when an event that should encourage speeding occurs. An event that should encourage speeding is when radar waves radiated by a speed measuring device are received. The information to be notified may be, for example, the presence of a speed measuring device, the type of the speed measuring device, the reception and type of electromagnetic waves radiated by the speed measuring device, or a warning to observe the speed limit, or a combination of these.

[0025] The first and second radar wave receiving units 4, 5 have an antenna and a demodulator such as a superheterodyne type demodulator, and receive and detect the radar waves of the first and second wavelength bands (frequency bands) of the radar waves irradiated by the radar-type speed measuring device. The first and second radar wave receiving units 4, 5 are controlled to be turned on and off by the control unit 20. The first radar wave receiving unit 4 is assigned to the first wavelength band, and receives and detects the radar waves of the first wavelength band. The second radar wave receiving unit 5 is assigned to the second wavelength band different from the first wavelength band, and receives and detects the radar waves of the second wavelength band. The wavelength band (frequency band) of the radar wave here is the so-called X-band or K-band wavelength band. When the first and second radar wave receiving units 4, 5 receive the radar waves of the speed measuring device, they output a detection signal to the control unit 20.

[0026] Fig. 3 is a diagram showing the relationship between the first and second frequency bands of radar waves. As shown in Fig. 3, the first and second frequency bands are set to non-overlapping bands in the frequency of the radar waves.

[0027] The positioning signal receiving unit 11 has an antenna, a demodulator, and a processor capable of receiving radio signals from positioning satellites, receives and demodulates positioning signals from a GNSS (Global Navigation Satellite System), and calculates the vehicle position based on the latitude and longitude of the current position. The positioning signal receiving unit 11 outputs the calculated vehicle position information to the control unit 20.

[0028] A user inputs information to the user setting input unit 12. For example, the user setting input unit 12 is realized by the input function of the display (touch panel) 6. The information input from the user setting input unit 12 is output to the control unit 20.

[0029] The notification unit 13 notifies various kinds of alarms. For example, the notification unit 13 is a display 6 and / or a speaker arranged in the main body 2. With this configuration, the notification unit 13 is controlled by the control unit 20.

[0030] The control unit 20 is a so-called computer including a processor such as a CPU, FPGA, or microcomputer, a storage for storing programs and data, and a work memory. The control unit 20 executes various processes for each component of the detector 1. Specifically, the control unit 20 has a storage unit 30 and a notification control unit 40.

[0031] The storage unit 30 stores first and second set position information 31, 32, and first and second set time information 33, 34. The set position information 31, 32 is position information for activating either the first radar wave receiving unit 4 or the second radar wave receiving unit 5. Specifically, the first set position information 31 is position information for determining whether or not the first radar wave receiving unit 4 has been activated, and the second set position information 32 is position information for determining whether or not the second radar wave receiving unit 5 has been activated. The set time information 33, 34 is time information for activating either the first radar wave receiving unit 4 or the second radar wave receiving unit 5. Specifically, the first set time information 33 is time information for determining whether or not the first radar wave receiving unit 4 has been activated, and the second set time information 34 is time information for determining whether or not the second radar wave receiving unit 5 has been activated. The setting position information 31, 32 and the setting time information 33, 34 are initially set at the time of shipment, and can also be set by the retail store or user of the detector 1. When set by the retail store or user of the detector 1, the setting is based on information input from the user setting input unit 12.

[0032] The notification control unit 40 controls the activation of the first radar wave receiving unit 4 and the second radar wave receiving unit 5 based on the vehicle position from the positioning signal receiving unit 11, and the set position information 31, 32 and set time information 33, 34 from the memory unit 30. The notification control unit 40 then issues a notification based on the reception of the first radar wave and the second radar wave by the first radar wave receiving unit 4 and the second radar wave receiving unit 5. Next, an example of the configuration of the notification control unit 40 for performing such processing will be described.

[0033] FIG. 4 is a block diagram showing an example of the configuration of the notification control unit 40. As shown in FIG.

[0034] 4, notification control unit 40 has a switching determination unit 41, a first radar wave reception control unit 42, a second radar wave reception control unit 43, a first radar wave notification control unit 44, and a second radar wave notification control unit 45. Each of these units constituting notification control unit 40 is realized by program processing by a processor, etc.

[0035] The switching determination unit 41 determines whether or not to issue a notification based on the first radar wave and the second radar wave, based on the vehicle position information from the positioning signal receiving unit 11, and the set position information 31, 32 and set time information 33, 34 of the memory unit 30. The first radar wave reception control unit 42 controls the activation of the first radar wave receiving unit 4, based on the determination result of the switching determination unit 41. The second radar wave reception control unit 43 controls the activation of the second radar wave receiving unit 5, based on the determination result of the switching determination unit 41. The first radar wave notification control unit 44 issues a notification by the notification unit 13, based on the reception result of the first radar wave by the activated first radar wave receiving unit 4. The second radar wave notification control unit 45 issues a notification by the notification unit 13, based on the reception result of the second radar wave by the activated second radar wave receiving unit 5.

[0036] Figs. 5 to 10 are diagrams showing flowcharts of exemplary processes performed by each component of the notification control unit 40. Fig. 5 is a diagram showing a flowchart of an exemplary process performed by switching determination unit 41. Fig. 6 is a diagram showing a flowchart of an exemplary process performed by control upon reception of a first radar wave. Fig. 7 is a diagram showing a flowchart of an exemplary process performed by control upon reception of a second radar wave. Fig. 8 is a diagram showing a flowchart of an exemplary process performed by first radar wave notification control unit 44. Fig. 9 is a diagram showing a flowchart of an exemplary process performed by second radar wave notification control unit 45. Fig. 10 is a diagram showing a flowchart of an exemplary process performed by control upon reception of the first and second radar waves.

[0037] 5, first, in step S1, the switching determination unit 41 acquires determination information. Specifically, the switching determination unit 41 acquires the vehicle position information from the positioning signal receiving unit 11, and the setting position information 31, 32 and the setting time information 33, 34 of the storage unit 30.

[0038] In the process of the next step S2, the switching determination unit 41 determines whether or not to make the notification based on the first radar wave the main notification. Specifically, based on the information acquired in the process of step S1, the switching determination unit 41 determines that the notification based on the first radar wave is to be the main notification if the vehicle position from the positioning signal receiving unit 11 matches the first set position or if the vehicle position is within a preset range from the first installation position. Alternatively, based on the information acquired in the process of step S1, the switching determination unit 41 determines that the notification based on the first radar wave is to be the main notification if the current time matches the first set time or if the current time is within a preset range from the first installation time.

[0039] If the switching determination unit 41 determines that the notification based on the first radar wave is to be the main notification, the process proceeds to step S4. On the other hand, if the switching determination unit 41 determines that the notification based on the first radar wave is not to be the main notification, the process proceeds to step S3.

[0040] Note that, when both of the above-mentioned determinations based on the first set position and the first set time are satisfied, the switching determination unit 41 can also determine that the notification based on the first radar wave is to be the main notification.

[0041] In the process of step S3, the switching determination unit 41 determines whether or not to make the notification based on the second radar wave the main notification. Specifically, based on the information acquired in the process of step S1, the switching determination unit 41 determines that the notification based on the second radar wave is the main notification if the vehicle position from the positioning signal receiving unit 11 matches the second set position or if the vehicle position is within a preset range from the second installation position. Alternatively, based on the information acquired in the process of step S1, the switching determination unit 41 determines that the notification based on the second radar wave is the main notification if the current time matches the second set time in the storage unit 30 or if the current time is within a preset range from the second installation time.

[0042] If switching determination unit 41 determines that the notification based on the second radar wave is to be the main notification, the process proceeds to step S5. On the other hand, if switching determination unit 41 determines that the notification based on the second radar wave is not to be the main notification, that is, if switching determination unit 41 determines that neither the notification based on the first nor the second radar wave is to be the main notification, the process proceeds to step S6.

[0043] Note that, when both of the above-mentioned determinations based on the second set position and the second set time are satisfied, the switching determination unit 41 can also determine that the notification based on the second radar wave is to be the main notification.

[0044] In step S4, processing based on the first radar wave (processing shown in FIG. 6) is performed. In step S5, processing based on the second radar wave (processing shown in FIG. 7) is performed. In step S6, processing based on the first and second radar waves (processing shown in FIG. 10) is performed.

[0045] In this manner, the switching determination unit 41 determines whether or not to perform processing based on the first radar wave and the second radar wave, based on the vehicle position information from the positioning signal receiving unit 11, the first and second set position information 31, 32, and the first and second set time information 33, 34 in the memory unit 30.

[0046] When the process proceeds to step S4, first, as shown in FIG. 6, in step S21, the first radar wave reception control unit 42 turns on (starts) the first radar wave reception unit 4.

[0047] In the subsequent process of step S22, first radar wave reception control section 42 determines, based on the output signal from first radar wave reception section 4, whether or not first radar wave reception section 4 has received the first radar wave.

[0048] In the next process of step S23, first radar wave reception control unit 42 determines the reception result from the process of step S22. If the reception result indicates that the first radar wave is being received, first radar wave reception control unit 42 proceeds to process step S24. On the other hand, if the reception result indicates that the first radar wave is not being received, first radar wave reception control unit 42 skips process step S24 and proceeds to process step S25.

[0049] In the process of step S24, first radar wave notification control unit 44 performs notification control based on the first radar wave (the process shown in FIG. 8), and then proceeds to the process of step S25.

[0050] In the process of step S25, the first radar wave reception control unit 42 turns off the first radar wave reception unit 4 (stops reception).

[0051] In this manner, first radar wave reception control unit 42 turns on (starts) first radar wave receiver 4, and when it determines that first radar wave receiver 4 has received the first radar wave, proceeds to alarm control based on the first radar wave by first radar wave alarm control unit 44 (the process shown in FIG. 8 ). Then, when the alarm control ends, first radar wave reception control unit 42 turns off first radar wave receiver 4 (stops reception). On the other hand, when first radar wave reception control unit 42 determines that first radar wave receiver 4 has not received the first radar wave, it turns off first radar wave receiver 4 (stops reception) without executing alarm control.

[0052] That is, when switching determination unit 41 determines that the notification based on the first radar wave should be the main notification, first radar wave reception control unit 42 starts first radar wave receiver 4 to make the first radar wave receivable. Then, when first radar wave receiver 4 receives the first radar wave, first radar wave reception control unit 42 proceeds to control the notification based on the first radar wave.

[0053] In the notification control based on the first radar wave, as shown in Fig. 8, first, in step S61, first radar wave notification control unit 44 determines whether the received first radar wave satisfies the notification requirements for the first radar wave. For example, when first radar wave notification control unit 44 receives the first radar wave at a preset intensity for a preset time, it determines that the notification requirements for the first radar wave are satisfied. When first radar wave notification control unit 44 determines that the received first radar wave satisfies the notification requirements for the first radar wave, it proceeds to step S62. On the other hand, when first radar wave notification control unit 44 determines that the received first radar wave does not satisfy the notification requirements for the first radar wave, it ends the process of Fig. 8.

[0054] As the process of step S62, first radar wave report control unit 44 performs a report by report unit 13. After that, first radar wave report control unit 44 ends the process of FIG.

[0055] In this manner, when first radar wave notification control unit 44 determines that the received first radar wave satisfies the requirements for notification by the first radar wave, first radar wave notification control unit 44 causes notification unit 13 to perform notification.

[0056] Furthermore, when the process proceeds to step S5, first, as shown in FIG. 7, second radar wave reception control section 43 turns on (starts) second radar wave reception section 5 as the process of step S41.

[0057] In the subsequent process of step S42, second radar wave reception control section 43 determines, based on the output signal from second radar wave reception section 5, whether second radar wave reception section 5 has received the second radar wave.

[0058] In the next process of step S43, second radar wave reception control unit 43 determines the reception result from the process of step S42. If the reception result indicates that the second radar wave is being received, second radar wave reception control unit 43 proceeds to process step S44. On the other hand, if the reception result indicates that the second radar wave is not being received, second radar wave reception control unit 43 skips process step S44 and proceeds to process step S45.

[0059] In the process of step S44, second radar wave notification control unit 45 performs notification control based on the second radar wave (the process shown in FIG. 8), and then proceeds to the process of step S45.

[0060] In the process of step S45, second radar wave reception control section 43 turns off second radar wave reception section 5 (stops reception).

[0061] In this manner, second radar wave reception control unit 43 turns on (starts) second radar wave receiver 5, and when it determines that second radar wave receiver 5 has received the second radar wave, proceeds to alarm control based on the second radar wave by second radar wave alarm control unit 45 (the process shown in FIG. 9 ). Then, when the alarm control ends, second radar wave reception control unit 43 turns off second radar wave receiver 5 (stops reception). On the other hand, when second radar wave reception control unit 43 determines that second radar wave receiver 5 has not received the second radar wave, it turns off second radar wave receiver 5 (stops reception) without executing alarm control.

[0062] That is, when switching determination unit 41 determines that the notification based on the second radar wave should be the main notification, second radar wave reception control unit 43 starts second radar wave receiver 5 to make the second radar wave receivable. Then, when second radar wave receiver 5 receives the second radar wave, second radar wave reception control unit 43 proceeds to control the notification based on the second radar wave.

[0063] In the notification control based on the second radar wave, as shown in Fig. 9, first, in step S81, second radar wave notification control unit 45 determines whether the received second radar wave satisfies the notification requirements for the second radar wave. For example, when second radar wave notification control unit 45 receives the second radar wave at a preset intensity for a preset time, it determines that the notification requirements for the second radar wave are satisfied. When second radar wave notification control unit 45 determines that the received second radar wave satisfies the notification requirements for the second radar wave, it proceeds to step S82. On the other hand, when second radar wave notification control unit 45 determines that the received second radar wave does not satisfy the notification requirements for the second radar wave, it ends the process of Fig. 9.

[0064] As the process of step S82, second radar wave report control unit 45 performs a report by report unit 13. After that, first radar wave report control unit 44 ends the process of FIG.

[0065] In this manner, when second radar wave notification control unit 45 determines that the received second radar wave satisfies the requirements for notification by the second radar wave, second radar wave notification control unit 45 causes notification unit 13 to perform notification.

[0066] Moreover, when the process proceeds to step S6, first, as shown in FIG. 10, in step S101, first radar wave reception control section 42 turns on (starts) first radar wave reception section 4.

[0067] In the subsequent process of step S102, first radar wave reception control section 42 determines, based on the output signal from first radar wave reception section 4, whether or not first radar wave reception section 4 has received the first radar wave.

[0068] In the next process of step S103, first radar wave reception control unit 42 determines the reception result from the process of step S102. If the reception result indicates that the first radar wave is being received, first radar wave reception control unit 42 proceeds to process step S104. On the other hand, if the reception result indicates that the first radar wave is not being received, first radar wave reception control unit 42 skips the process of step S104 and proceeds to process step S105.

[0069] In the process of step S104, the process shown in Fig. 8 is executed. That is, when first radar wave notification control unit 44 determines that the received second radar wave satisfies the notification requirements for the first radar wave, notification is performed by notification unit 13. Then, the process proceeds to step S105.

[0070] In the subsequent process of step S105, the first radar wave reception control unit 42 turns off the first radar wave reception unit 4 (stops reception).

[0071] In the subsequent process of step S106, second radar wave reception control section 43 turns on (starts) second radar wave reception section 5.

[0072] In the subsequent process of step S107, second radar wave reception control section 43 determines, based on the output signal from second radar wave reception section 5, whether second radar wave reception section 5 has received the second radar wave.

[0073] In the next process of step S108, second radar wave reception control unit 43 determines the reception result from the process of step S107. If the reception result indicates that the second radar wave is being received, second radar wave reception control unit 43 proceeds to process step S108. On the other hand, if the reception result indicates that the second radar wave is not being received, second radar wave reception control unit 43 skips the process of step S109 and proceeds to process step S110.

[0074] In the process of step S109, the process shown in Fig. 9 is executed. That is, when second radar wave notification control unit 45 determines that the received second radar wave satisfies the requirements for notification by the second radar wave, notification is performed by notification unit 13. Then, the process proceeds to step S110.

[0075] In the subsequent process of step S110, second radar wave reception control section 43 turns off second radar wave reception section 5 (stops reception).

[0076] In this manner, first radar wave reception control unit 42 turns on (starts) first radar wave receiver 4, and, when it determines that first radar wave receiver 4 has received the first radar wave, performs notification control based on the first radar wave by first radar wave notification control unit 44. On the other hand, when first radar wave reception control unit 42 determines that first radar wave receiver 4 has not received the first radar wave, it turns off first radar wave receiver 4 (stops reception).

[0077] Next, second radar wave reception control unit 43 turns on (starts) second radar wave receiver 5, and, if it determines that second radar wave receiver 5 has received the second radar wave, performs notification control based on the second radar wave by second radar wave notification control unit 45. On the other hand, if second radar wave reception control unit 43 determines that second radar wave receiver 5 has not received the second radar wave, it turns off second radar wave receiver 5 (stops reception).

[0078] (action, effect, etc.) An example of the operation and effects of the detector 1 will now be described.

[0079] The detector 1 has a switching determination unit 41 that determines whether or not to perform processing based on the first radar wave and the second radar wave, based on the vehicle position information from the positioning signal receiving unit 11, as well as the first and second set position information 31, 32 and the first and second set time information 33, 34 in the memory unit 30.

[0080] Here, in the process based on the first radar wave (the process shown in FIG. 6 and FIG. 8), first radar wave reception control unit 42 turns on (activates) first radar wave receiver 4, and when first radar wave receiver 4 receives the first radar wave, first radar wave notification control unit 44 performs notification control based on the first radar wave. In the notification control based on the first radar wave, when the received first radar wave satisfies the notification requirements for the first radar wave, first radar wave notification control unit 44 performs notification through notification unit 13. After the notification is completed, first radar wave reception control unit 42 turns off first radar wave receiver 4 (stops reception). On the other hand, when first radar wave receiver 4 does not receive the first radar wave, first radar wave reception control unit 42 turns off first radar wave receiver 4 (stops reception) without performing notification control.

[0081] In the process based on the second radar wave (the process shown in FIG. 7 and FIG. 9), second radar wave reception control unit 43 turns on (starts) second radar wave receiver 5, and when it determines that second radar wave receiver 5 has received the second radar wave, second radar wave notification control unit 45 performs notification control based on the second radar wave. In the notification control based on the second radar wave, when second radar wave notification control unit 45 determines that the received second radar wave satisfies the notification requirements for the second radar wave, it performs notification through notification unit 13. After the notification is completed, second radar wave reception control unit 43 turns off second radar wave receiver 5 (stops reception). On the other hand, when second radar wave reception control unit 43 determines that second radar wave receiver 5 has not received the second radar wave, it turns off second radar wave receiver 5 (stops reception) without performing notification control.

[0082] Furthermore, in the processing based on the first and second radar waves (processing shown in FIGS. 8 to 10), first radar wave reception control unit 42 turns on (starts) first radar wave receiver 4, and when first radar wave receiver 4 receives the first radar wave, first radar wave notification control unit 44 performs notification control based on the first radar wave. After the notification is completed, first radar wave reception control unit 42 turns off first radar wave receiver 4 (stops reception). On the other hand, if first radar wave receiver 4 does not receive the first radar wave, first radar wave reception control unit 42 turns off first radar wave receiver 4 (stops reception) without performing notification control.

[0083] Next, second radar wave reception control unit 43 turns on (starts) second radar wave receiver 5, and when second radar wave receiver 5 receives the second radar wave, second radar wave notification control unit 45 performs notification control based on the second radar wave. After the notification is completed, second radar wave reception control unit 43 turns off second radar wave receiver 5 (stops reception). On the other hand, when second radar wave reception control unit 43 determines that second radar wave receiver 5 is not receiving the second radar wave, it turns off second radar wave receiver 5 (stops reception) without performing notification control.

[0084] Through the above processing, the detector 1 selectively performs processing based on the first radar wave, processing based on the second radar wave, and processing based on the first and second radar waves based on the current vehicle position and the current time, and issues a report based on the first radar wave or the second radar wave by activating either the first radar wave receiving unit 4 or the second radar wave receiving unit 5. That is, based on the current vehicle position and the current time, the detector 1 selectively activates either the first radar wave receiving unit 4 or the second radar wave receiving unit 5, and issues a report based on the radar wave with either the first radar wave or the second radar wave as the main and the other as the sub. Alternatively, depending on the current vehicle position and the current time, the detector 1 activates the first radar wave receiving unit 4 and the second radar wave receiving unit 5 sequentially without operating them simultaneously, and when it receives either the first radar wave or the second radar wave, issues a report based on the received radar wave.

[0085] In this way, the detector 1 receives radar waves and issues an alert by activating either the first radar wave receiving unit 4 or the second radar wave receiving unit 5 based on the current vehicle position and the current time, or by activating the first radar wave receiving unit 4 and the second radar wave receiving unit 5 sequentially without operating them simultaneously.

[0086] This allows the detector 1 to operate preferentially either the first radar wave receiving unit 4 or the second radar wave receiving unit 5 only in a specific area or during a specific time period, to receive radar waves and issue an alert.

[0087] (Effects of this embodiment) (1) The detector 1 can report based on the reception result from the more appropriate radar wave receiving unit out of the first and second radar wave receiving units 4, 5.

[0088] This enables the detector 1 to optimally match the radar wave reception environment to the operating conditions of the speed measurement device, thereby improving the reception accuracy of the radar waves.

[0089] Furthermore, while one radar wave receiving unit is operating, the detector 1 does not operate the other radar wave receiving units, and issues a report based on the reception result of the one radar wave receiving unit. This allows the one radar wave receiving unit to issue a report with high accuracy based on the reception result of the one radar wave receiving unit, without being interfered with by the operation of the other radar wave receiving units.

[0090] Furthermore, it is possible to use a single radar wave receiving unit to scan and receive radar waves in multiple frequency bands, but this would result in a delay in radar wave detection because radar waves in a wide range of frequency bands are scanned.In contrast, in the detector 1 according to the present invention, each radar wave receiving unit receives radar waves in its assigned frequency band, so delays in radar wave detection caused by the scanning operation can be prevented.

[0091] (2) The detector 1 can report based on the reception result of the more appropriate radar wave receiving unit selected based on the vehicle position from the first and second radar wave receiving units 4, 5. This enables the detector 1 to optimally match the radar wave reception environment to the operating status of the speed measurement device (the location where the measurement is being performed).

[0092] (3) The detector 1 can report based on the reception results of the more appropriate radar wave receiving unit selected based on the time from the first and second radar wave receiving units 4, 5. This enables the detector 1 to optimally match the radar wave reception environment to the operating status of the speed measurement device (the time period when measurement is being performed).

[0093] (4) The detector 1 can report based on the reception results of one of the first and second radar wave receiving units 4, 5, whichever is appropriate according to the user's settings.

[0094] In the above embodiment, the radar wave receiving units 4 and 5 constitute, for example, a receiving means. The notification unit 13 constitutes, for example, a notification means. The control unit 20 constitutes, for example, a control means. The positioning signal receiving unit 11 constitutes, for example, a position detection means. The set position information 31 and 32 constitute, for example, position information that is set in advance. The set time information 33 and 34 constitute, for example, time information that is set in advance. The set position information and set time information set by the user constitute, for example, information set by the user that is set in advance.

[0095] (Variations, etc.) As another example of the above embodiment, the detector 1 may have three or more radar wave receiving units, one for each frequency band, for receiving radar waves in three or more different frequency bands.

[0096] As another example of the above embodiment, the detector 1 can also issue an alert via the alert unit 13 from the reception results of any of the multiple radar wave receiving units, based on information that enables the radar wave of the target to be properly received, in addition to vehicle position information and time information.

[0097] As another example of the above embodiment, the user can set information other than the vehicle position information and time information, and the detector 1 can issue an alert through the alert unit 13 based on the reception results of any of the multiple radar wave receiving units, based on the set information.

[0098] In addition, in the above embodiment, a speed measurement detection method is provided using a detector installed in a vehicle, the detector having a plurality of receiving means for each frequency band for receiving radar waves of a plurality of types of frequency bands emitted by a speed measurement device, and a speed measurement detection method is realized in which one receiving means is selected from the plurality of receiving means based on preset information, and predetermined information is reported from a reporting means based on the reception result of the selected receiving means.

[0099] Additionally, while an embodiment of the present invention has been disclosed, it will be apparent to those skilled in the art that modifications may be made thereto without departing from the scope of the present invention, and it is intended that all such modifications and equivalents be included in the following claims. [Explanation of symbols]

[0100] 1 detector, 4, 5 radar wave receiving unit, 11 positioning signal receiving unit, 12 user setting input unit, 13 notification unit, 20 control unit, 30 storage unit, 40 notification control unit

Claims

1. A detector installed in a vehicle, a plurality of receiving means for receiving radar waves of a plurality of frequency bands emitted by the speed measuring device; A notification means for notifying predetermined information; a control means for controlling the notification means to notify the user of a reception result from any one of the plurality of receiving means based on preset information; A detector having the above structure.

2. The vehicle further includes a position detection means for detecting a position of the vehicle, 2. The detector according to claim 1, wherein the control means performs an alert by the alert means based on a reception result of any one of the plurality of receiving means based on a comparison result between preset position information and the position information detected by the position detection means.

3. 2. The detector according to claim 1, wherein the control means causes the notification section to issue a notification based on a reception result from any one of the plurality of receiving means on the basis of preset time information.

4. 2. The detector according to claim 1, wherein the control means causes the notifying means to give an indication based on a reception result from any one of the plurality of receiving means on the basis of preset information set by a user.

5. A method for measuring and detecting speed using a detector installed in a vehicle, comprising: the detector has a plurality of receiving means for receiving radar waves of a plurality of frequency bands irradiated by the speed measuring device, selecting one receiving means from the plurality of receiving means based on preset information; A speed measurement and detection method in which predetermined information is notified from a notifying means based on the reception result of a selected receiving means.

Images