JP3626390B2 - Microwave detector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a microwave detector.
[0002]
[Prior art]
In recent years, many automatic speed measuring devices for measuring the speed of a vehicle have been installed around the road. As an example of an automatic speed measuring device, a microwave in a predetermined frequency band is emitted toward a vehicle, and the reflected wave is received to measure the traveling speed of the vehicle.
[0003]
On the other hand, in order to detect the presence of such an automatic speed measuring device, a microwave detector configured to detect a microwave emitted from the automatic speed measuring device and output an alarm is conventionally known.
[0004]
[Problems to be solved by the invention]
However, the conventional microwave detector has the following problems. That is, in an automatic speed measuring device, for example, a loop-type coil is embedded in the ground so as to detect the vehicle passing over the coil and also determine the vehicle speed, as called a loop type. There is. Others detect the speed of the vehicle using light other than microwaves. Therefore, such a speed measuring device cannot be detected by a conventional microwave detector.
[0005]
Furthermore, even if a microwave is used, the vehicle speed is measured by instantaneously emitting the microwave. In such a case, detection may be delayed due to the detection timing.
[0006]
In addition, information on places where automatic speed measuring devices are installed, regions where they are heavily deployed, or regions where vehicles loaded with speed measuring devices for measuring vehicle speed frequently appear is a magazine. And other information media. Therefore, it is better to check whether or not there is a relevant area on the route to travel in advance, and it is better to travel in a state where a specific position is remembered, but in reality it is only complicated to check each time. If driving while considering such a position, there is a possibility that driving concentration cannot be achieved.
[0007]
Furthermore, since the moving distance per unit time is long on an expressway or the like, there is a demand for detecting the presence of an automatic speed measuring device from the earliest possible time (distant position).
[0008]
On the other hand, automatic number reading devices called “N system” and “T system” have recently been installed on the roads throughout the country. This device has a camera, images a license plate of a vehicle passing under the camera, analyzes the captured image data, recognizes character information (number plate information) on the license plate, and digital data The digitized license plate information is stored in association with time data.
[0009]
Thereby, it can be understood which vehicle has passed through which point and when. Therefore, for example, when paying attention to a certain vehicle and finding the difference in time passing through an automatic number reading device installed at a different point, the time taken for the vehicle to actually move between two different points is obtained. Can do. This can be easily done by extracting the same number from the license plate information sent from each automatic number reader.
[0010]
Then, by calculating the actual travel time for a plurality of vehicles, the average travel time between the two points can be found. Based on this, the average travel time and the degree of congestion are displayed on the bulletin board as traffic jam information. can do. Therefore, for the following vehicle, the estimated arrival time can be predicted in advance, the drive course can be selected such as detouring, and further congestion can be avoided.
[0011]
It can also be used to find stolen vehicles. Furthermore, for example, it can be used in various fields, such as tracking the movement route of a vehicle that is running away, and predicting the destination, so that the criminal can be cleared quickly. This is one of the most useful systems.
[0012]
However, in order to effectively perform the various uses described above, the license plate information of all the vehicles passing under the automatic number reading device must be acquired and stored. Then, at least a certain vehicle can easily analyze information such as when and where it has been, and there is a privacy problem. Furthermore, technically, the driver can be identified by imaging the driver's seat together with the license plate information.
[0013]
And because license plate information is also a kind of personal information, and information such as when and where you went is also personal information, regardless of crime etc., for many people who drive while complying with traffic laws and regulations, Knowing the license plate information is not very good.
[0014]
However, it is necessary to know the traffic conditions that prompted the current situation in order to avoid further occurrence and expansion of traffic jams and to achieve the effectiveness of car navigation systems that incorporate traffic jam information. Therefore, considering the public interest, it is impossible to prevent the plate number information from being recorded, but from the viewpoint of information disclosure, at least the license plate information is captured and recorded by the driver itself. It can be said that there is a right to know.
[0015]
Also, the automatic number reading device that realizes the current “N system” is similar to a certain kind of automatic speed measuring device in appearance. And if an automatic speed measuring device is discovered while driving, even if the vehicle is operating at the legal speed, the driver's feelings are that he wants to step on the brake and reduce the speed. Then, the vehicle cannot travel at a constant speed, and when the brake lamp of the preceding vehicle is turned on for the following vehicle, the brake is often stepped on reflectively.
[0016]
Furthermore, when the flash is emitted toward the host vehicle while traveling, it is not possible to specify whether the device is based on an automatic speed measuring device or an automatic number reading device that realizes the “N system”. Then, as a driver's psychology, there is a suspicion that the speed has been violated, and there is a risk of hindering subsequent safe driving. This means that even if you are driving while thinking that you are driving at the legal speed, you can't drive by looking at the speedometer. It can be easily imagined that the psychological state of having gone through.
[0017]
Assuming such a situation, it is preferable if it is possible to identify what device emits light, since it is possible to concentrate on driving thereafter and promote safe driving.
[0018]
The present invention has been made in view of the above-described background, and the object of the present invention is to solve the above-described problems, and to output a necessary alarm based on the position of the vehicle, for safe driving. It is to provide a microwave detector that can also contribute.
[0019]
[Means for Solving the Problems]
In order to achieve the above-described object, in the microwave detector according to the present invention, a microwave detector main body that detects a microwave and outputs an alarm based on a predetermined operation setting condition, and obtains the current position of the vehicle. A position detection unit, a region storage unit for storing region information for specifying a certain region, and a current position obtained by the position detection unit exists in a region specified by the region information stored in the region information storage unit It is assumed that a control means is provided for determining whether or not to perform the alarm output when it exists.
[0020]
For example, when certain area information is registered, an alarm is output when the position detecting means detects that the position detecting means has moved into the area specified by the area information. Therefore, by setting the area to include the installation positions of various speed measuring devices and automatic number reading devices, an alarm is output regardless of whether or not microwaves are actually detected, and the driver is alerted. be able to. Therefore, it is possible to reliably notify the existence of a speed measuring device that is difficult to detect microwaves and various devices that do not use microwaves. The alarm output may be the same as or different from the alarm output that is output when the microwave detector has a microwave.
[0021]
The registration of the area information is performed by, for example, acquiring the current position when the position storage command is received by the position detection unit, generating the area information based on the acquired current position, and storing the area information in the area storage unit. A function is provided so that users can register later with this function.
[0022]
Furthermore, the storage of the region information in the region storage unit based on the position storage command is based on the condition that a predetermined microwave is detected and a registration confirmation command is received when the microwave is detected. To be done.
[0023]
In addition, a sensor for detecting infrared rays is provided, and when a predetermined infrared ray is detected, a function for generating the position storage command is provided, so that once a detection target device or the like is once detected automatically, By registering the position, it is possible to know the existence of the device reliably when traveling in the same area thereafter.
[0024]
The area information may be prepared in advance as basic area information. Furthermore, the basic area information is preferably updatable.
[0025]
In this way, even an automatic speed measuring device or the like installed in a place where it is difficult to find can be taught the position. This basic information can be supplied via various recording media or the like (for example, replacement of ROM). Further, by providing a data communication function, basic area information can be incorporated through communication. “Prepared” may be registered by the manufacturer at the time of manufacture, or may be registered later by attaching a ROM or the like as an option. Of course, in the case of storing the basic area information in this way, the information stored in the area storage unit may be only the basic area information or, together with the basic area information, as described in the above claims, the position storage You may memorize | store the area | region information memorize | stored based on instruction | command.
[0026]
Furthermore, it is preferable to provide an erasing function for erasing at least part of the area information stored in the area information storage unit. In this way, if the registered information is incorrect, the device to be detected has been removed, or the data related to the area that has become unnecessary due to a different travel range can be deleted, the memory Effective use.
[0027]
Further, the area information is erased not only by deleting / erasing the data itself, but also by storing the stored area information itself, for example, by providing a valid / invalid flag or deleting an index for data access. Is a concept including leaving and making the area information inaccessible (invalidating). In addition, if the area information itself remains, a function may be provided to restore the once deleted area information (for example, update of a flag, etc.) later.
[0028]
Furthermore, a means for calculating a vehicle speed from the output of the position detecting means is provided, and when the calculated vehicle speed is equal to or lower than a certain speed, at least an alarm output using information stored in the area information storage unit is not performed. It is good to.
[0029]
If the vehicle speed is obtained based on the output of the position detection means, the vehicle speed can be calculated with high accuracy (calculated from the time taken to move between two points, the distance moved per unit time, etc.) There is also a merit that installation and maintenance of sensors for calculation are not required.
[0030]
Furthermore, it is preferable to change the range of warning output using the information stored in the area information storage unit according to the vehicle speed. In other words, by increasing the area as the speed increases, it is possible to recognize the presence of the apparatus as a detection target as close as possible. This change may be made gradually wider as the vehicle speed increases, for example, and one or a plurality of threshold values are provided, and the range is expanded when the vehicle speed exceeds the threshold value. May be. Further, as a method of expanding, for example, a plurality of areas corresponding to the speed (speed range) may be set, and the corresponding area may be used to determine the inside / outside of the area, or the reference position and the current position Various other methods such as obtaining a separation distance from the vehicle and taking the vehicle speed into account when making a determination based on the separation distance can be used.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of a microwave detector according to the present invention will be described. The present invention is an apparatus mounted on a vehicle and used to detect and alert a microwave in a predetermined frequency band emitted from a speed measuring device that measures the speed of the vehicle.
[0032]
FIG. 1 is a block circuit diagram showing a configuration of a main part of the microwave detector 1. As shown in the figure, the microwave detector 1 detects a microwave in a predetermined frequency band based on the set operation setting conditions, outputs a warning, and a GPS detector 2 that acquires GPS information. Based on the output of the receiver 3, the GPS receiver 3, the operation controller 5 that controls a predetermined alarm output and the like, and notifies the operation controller 5 of a position storage command, an operation setting condition, and the like. An instruction input unit 6 is provided.
[0033]
The microwave detector main body 2 gives a reception signal based on the microwave captured through the horn antenna 2a to the microwave reception unit 2b, detects a microwave having a desired frequency, and outputs a detection signal. This detection signal is given to the reception determination unit 2c to determine whether or not the target microwave has been received. Further, the microwave receiving unit 2b is provided with an S meter output terminal, and the received signal strength output from the output terminal is given to the received strength determining unit 2d, where threshold processing is performed, and whether the received strength is above a certain level. It is determined whether or not.
[0034]
Then, the determination results of the reception determination unit 2c and the reception intensity determination unit 2d are given to the determination unit 2e, where it is determined whether or not a true microwave to be detected has been received. This determination is performed by, for example, AND processing, that is, when a microwave having a predetermined frequency is received by the reception determination unit 2c and a signal having a reception intensity equal to or higher than a certain reference is received by the reception intensity determination unit 2d. Can be judged. Needless to say, the determination method is not limited to this, and various methods can be used. Then, the functions of the reception determination unit 2c and the reception strength determination unit 2d may be appropriately changed according to the determination method.
[0035]
Further, when it is determined that the true microwave is detected by the determination unit 2e, a detection signal is given to the alarm device 2f, and a predetermined alarm is output. This alarm may be a buzzer or sound, or may be various types such as a lamp such as a light LED or a display.
[0036]
Note that the microwave receiver 2b uses, for example, a superheterodyne method in which the received signal and the output of the local oscillator are frequency-mixed by a mixer, the obtained intermediate frequency signal is input to a detector, and a signal of a predetermined frequency is detected. realizable. Moreover, since each processing part which comprises the microwave detector main body 2 is the same as that of the general structure used in the conventional microwave detector, the detailed description is abbreviate | omitted.
[0037]
The GPS receiver 3 receives a GPS signal emitted from the earth position measurement satellite, measures the current position of the vehicle, and obtains the traveling speed and the traveling direction based on the measured position. Specifically, GPS signals emitted from a plurality of satellites are received by the receiving antenna 3a and the GPS receiver 3b, and the reception is given to the position information calculation unit 3c, where the current position is based on the received information. (Longitude, latitude information) is calculated.
[0038]
The calculated current position information is given to the operation control unit 5 and the vehicle speed determination unit 3d. For example, the vehicle speed determination unit 3d can obtain the travel distance per unit time from the position information at a certain time and the position information after the unit time has elapsed, and can calculate the vehicle speed therefrom. Similarly, the traveling direction determination unit 3e can obtain the movement direction by obtaining the movement vector from the position information at a certain time and the position information after a certain time.
[0039]
As described above, when determining the vehicle speed and the moving direction, for example, two memories are prepared, one of which stores position information at the measurement time point, and the other is a certain time after the measurement time point (for example, after 2 seconds). ) Is stored, the vehicle speed and the traveling direction of the vehicle can be determined from the two pieces of position information. Moreover, although it is said determination, the determination of a vehicle speed will be performed at a fixed sampling interval.
[0040]
Further, the operation control unit 5 has a function of generating and storing area information to be alarmed based on a command from the instruction input unit 6, and a function of outputting an alarm based on the stored area information and current position information. . Further, it has a function of setting operation setting conditions of the microwave detector main body 2, and has a function of setting operation setting conditions given from the instruction input unit 6 as they are.
[0041]
The function of storing the area information will be briefly described. Basically, when a position storage command is given from the instruction input unit 6, the position information at that time is acquired, and a predetermined area is determined based on the position information. Area information for specifying is generated and stored in the area information memory. Thereafter, the position information sent from the GPS receiving unit 3 is acquired, and it is determined whether the acquired position information is located within the area specified by the area information. A predetermined alarm is output via the alarm device 10. Specifically, it is as follows.
[0042]
As shown in FIG. 2, first, the instruction input unit 6 includes a position storage command switch 6a provided on the surface of the microwave detector 1 and a condition input switch 6b for inputting setting conditions for operation setting. ing.
[0043]
The condition input switch 6b is for manually setting the operation setting conditions of the microwave detector main body 2, and has reception sensitivity, alarm type (buzzer, sound, LED only, etc.), and volume. Each condition may be input from a separate switch. Sensitivity, volume, etc. may be selected from a plurality of preset levels by a select button or the like, or may be changed steplessly.
[0044]
Then, the setting condition input via the condition input switch 6 b is transferred to the writing unit 7 a of the processing unit 7 of the operation control unit 5, and the writing unit 7 a is stored in the setting condition storage unit 8 a in the memory 8. Store. The setting condition storage unit 8a stores the current operation setting conditions. When the setting input storage unit 8a is basically updated by operating the condition input switch 6b, the reading unit 7b updates the setting condition storage unit 8a. While reading the contents, the read contents are transferred to the setting command unit 7c, and the setting command unit 7c sends an operation setting condition switching command to the microwave receiver body 2.
[0045]
In response to this switching command, the microwave detector main body 2 increases / decreases the reception sensitivity and adjusts the alarm type and volume. This is the process for changing the operation setting condition accompanying manual input. Note that the switching operation on the microwave detector main body 2 side is the same as the conventional one, and the detailed description thereof is omitted.
[0046]
Further, when the position storage command switch 6a of the instruction input unit 6 is pressed, the control unit 9 of the operation control unit 5 recognizes that the switch has been pressed, and the control unit 9 indicates that the switch has been pressed, That is, the processing unit 7 is notified that the position storage command has been issued. Then, the processing unit 7 (alarm drive command unit 7d) acquires the current position information from the GPS receiving unit 3, generates area information based on the acquired position information, and stores the area information in the area in the memory 8. The information is stored in the information storage unit 8b.
[0047]
As this area information, for example, a predetermined area is set on the basis of position information. For example, the predetermined area may be specified by a radius such as a range of a radius of 500 m, or the distance may be set in the east, west, south, and north directions. Furthermore, since the traveling direction can be specified from the history of position information, a vertically long region can be set along the traveling direction. In this embodiment, the radius is specified with an easy processing. That is, the area information is configured in a table state in which the reference position (acquired position information) and the radius are associated with each other. Further, the radius or the like may be determined in advance, or a reference distance (for example, 100 m) may be set, and the distance may be increased by the number of operation buttons pressed.
[0048]
Further, the processing unit 7 (alarm drive command unit 7d) acquires the position information and the vehicle speed information output from the GPS receiving unit 3 at a predetermined sampling interval, and performs the following processing. That is, based on the vehicle speed information, when the vehicle speed becomes slower than a certain speed (for example, a speed that can be expected to travel in the city like 40 km), an alarm output via the alarm device 10 is output. Control not to.
[0049]
And as processing based on the position information which is the main part of the present invention, it is determined whether or not the acquired current position is located within a predetermined area specified by the area information, and if it exists, an alarm output is output. To do. In this determination, a separation distance between the reference position and the current position is obtained, and when it is within a radius distance, it can be determined that the area is within the area.
[0050]
The alarm output may be, for example, a sound such as “Warning area. Please be careful.”, An alarm with a buzzer or a lamp. Furthermore, you may use them together. Preferably, if the type is different from the alarm output when the microwave is actually detected, the driver may receive an alarm accompanying the operation of the microwave detector body 2 or position information which is a main part of the present invention. This is preferable because it is possible to distinguish between alarms based on. Of course, the same alarm output may be used.
[0051]
In the case of differentiating, if a predetermined microwave is detected on the microwave detector body 2 side during the alarm output based on the position information, an alarm output based on the detection may be performed.
[0052]
Furthermore, once you have entered the area, you will move within the area for a certain period of time, but you may continue to output an alarm while you are in the area, or you entered the area. Then, an alarm may be output for a certain period of time when entering, and thereafter, a release notification may be made by voice such as “I got out of the alert area” when exiting from the area.
[0053]
Further, the content of the alarm output may be changed according to the separation distance from the reference position. That is, for example, when entering an area within 500 m, the first light alarm output is performed, and when entering an area within 300 m of the reference position, the alarm is speeded up. That is, when the lamp (LED) is lit, the frequency of blinking can be increased, the color of light emission can be changed, or the number of lights can be changed. In the case of a buzzer, the frequency can be increased, the sound can be increased, and the volume can be increased. In the case of audio, the first is “entered the caution area”, and the second time (when approached), “entered the alert area”, or specifically “approached within 300 m” ”And so on.
[0054]
Furthermore, the area for changing the alarm output set based on the separation distance from the reference position in this way is not limited to the one divided into the two areas, but more than three, and the alarm output can be changed more finely. Thus, the distance from the reference position may be transmitted in detail.
[0055]
Further, the area for alarm output may be varied depending on the speed. In other words, when the vehicle is traveling at a low speed of 40 km or less, it is as described above that the alarm output is not performed. You can also see it. For example, when traveling at a high speed such as 80 km or more, the area may be widened (the radius is increased), and a warning may be output even at a position farther from the reference position.
[0056]
In order to change the region based on the speed information, it can be realized by registering a plurality of reference positions, radii with respect to the speed (a certain range), etc. when storing in the region information storage unit 8b (FIG. 3). reference). Also, the number of radii to be registered may be one, and the radius may be used as a reference radius and an arithmetic expression with the speed as a variable may be registered, and the range may be increased or decreased by the arithmetic expression. Of course, there is no need to provide an area changing function based on the speed.
[0057]
Note that the alarm device 10 that outputs an alarm based on position information may use the alarm device 2f in the microwave detector main body 2 or may be formed separately in actual hardware. The same applies to the following embodiments.
[0058]
FIG. 4 shows a main part of a second embodiment of the microwave detector according to the present invention. As shown in the figure, in the present embodiment, the reception signal strength is also used when generating the region information. That is, in the first embodiment, if the position storage command switch 6a is pressed, the current position information at that time is registered as the reference position. In the present embodiment, the microwave detector The area information is generated and registered based on the detection result of the main body 2.
[0059]
That is, the determination result of the determination unit 2e is received, and the detection start position and the detection end position when a predetermined microwave is detected are acquired. Then, region information is generated based on the detection start position and the detection end position. Specifically, for example, a rectangular area having a certain width can be obtained with reference to a line connecting the two positions, and four vertices of the rectangular area can be registered. The fixed width can be determined in consideration of, for example, the width of the road or the curve of the road.
[0060]
In the subsequent actual determination, it is determined whether or not the detected current position information exists within an area determined by the four vertices, and if it exists, an alarm is output. Since other configurations and operational effects are the same as those of the first embodiment described above, the same reference numerals are assigned to corresponding members, and detailed descriptions thereof are omitted.
[0061]
The setting of the area information based on the detection start position and the detection end position is not limited to the above, and a certain margin is provided before and after the area including the detection start position and the detection end position. Can be set to Further, instead of taking a margin for both of them, it is possible to output a warning from the front side by taking a margin for one (usually the detection start position side).
[0062]
Furthermore, the registration of the region information based on the detection of the predetermined microwave is not limited to the registration based on the two positions of the detection start position and the detection end position as described above. During the process, the position information is acquired at a fixed sampling interval, the movement trajectory is obtained from a series of position information, and the area information along the movement trajectory may be set. Each piece of information can be set as reference position information, and a certain range can be set as an individual detection target area based on the reference position information.
[0063]
Furthermore, in the above-described embodiment, the region information is registered every time the microwave is detected. For example, the confirmation input 6 is provided with the confirmation switch 6c, and the confirmation switch 6c is pressed during the microwave detection. Only when it is (or when it is not pressed), it may be registered in the area information storage unit 8b.
[0064]
In addition, as a function of the determination unit 2e of the microwave detector body 2, if it has a function of specifying the type of detected microwave (the detection method of the cracking device), register the detected type together, When outputting an alarm based on position information, an alarm should be given so that the type of the alarm can be understood.
[0065]
In the above-described embodiment, as in the first embodiment, a function for inputting position information by manual input is provided. However, in this embodiment, only the automatic registration function is provided without providing such a function. Of course, it may be provided.
[0066]
FIG. 5 shows a third embodiment of the microwave detector according to the present invention. Similar to the second embodiment described above, it is the same that the region information is specified based on the detection of the desired microwave, but in this embodiment, the region information is generated in consideration of the received signal strength. I am doing so.
[0067]
That is, when a notification of detection of a predetermined microwave is received from the determination unit 2e, the received signal strength at that time is also acquired, and the two are associated and temporarily stored. Then, while continuously receiving microwaves, the position information and the received signal intensity are sampled, and the position having the highest received intensity is obtained. Since this maximum received intensity position can be estimated as the installation position of the automatic control device to be detected (the position closest to it), it is set as the reference position.
[0068]
Then, an area is set based on the reference position. This area may be specified by a radius centered on the reference position, as in the first embodiment, or the area from the detection start position to the reference position (possible with a certain margin) may be set as an area, Since the traveling direction is known from the locus of the position information, various methods such as setting a predetermined range on the near side of the reference position as the region can be adopted. Other configurations and operational effects are the same as those of the second embodiment described above and modifications thereof (for example, a function for selecting whether or not to register can be provided by a confirmation switch). A detailed description thereof will be omitted.
[0069]
FIG. 6 shows a fourth embodiment of the microwave detector according to the present invention. In the present embodiment, unlike the above-described embodiments, an infrared detection unit 11 is provided. The infrared detector 11 is configured to detect infrared rays (red) from a specific device (such as an automatic number reader) such as an N system based on an infrared detection sensor (infrared light receiver) 11a and an output of the infrared detection sensor 11a. It is provided with a determination unit 11b for determining whether or not the light is external light. For example, the determination unit 11b can determine whether the device is a specific device from the light emission pattern. When it is determined that the infrared ray is detected from the device to be detected, an alarm is output (such as “N system” voice, lamp, buzzer, etc.). In this embodiment, when the determination unit 11b determines that a predetermined infrared ray is received, an alarm is output using the alarm device 2f of the micro-detector body 2, but a separate alarm device is provided. Alternatively, the alarm device 10 may be used to output an alarm.
[0070]
When the determination unit 11b determines that there is a device to be detected during traveling, the position information at that time is acquired, and the position information acquired in the same manner as in the second embodiment is used as a reference position. Based on this, region information can be generated and stored in the region information storage unit 8b.
[0071]
Thereafter, when entering the area, an alarm such as “N system area” is issued. Furthermore, when infrared rays are detected while traveling in the area based on the N system, it is more preferable to output an alarm such as “photographed”. Since other configurations and operational effects are the same as those of the above-described embodiments and modifications, the same reference numerals are assigned to corresponding members, and detailed descriptions thereof are omitted.
[0072]
FIG. 7 shows a fifth embodiment of the microwave detector according to the present invention. In the first embodiment, the area information is generated and stored based on the position information when the position storage command switch 6a is pressed. In the present embodiment, the map information storage section 8c is provided, The region setting switch 6d is operated so that an arbitrary position in the map information can be registered.
[0073]
That is, when a monitor is provided and the map information is output and displayed on the monitor, for example, the touch panel as the area setting switch 6d is provided on the monitor, and the area information can be designated by touching the monitor screen. This specification method can be used for specifying a reference point and setting a region based on the reference point or for suddenly specifying only a range. Since other configurations and operational effects are the same as those of the first embodiment, detailed description thereof is omitted.
[0074]
In addition, the area information is not registered manually or automatically as described above, but may be stored in advance in the same manner as the map information described above, or the recording media (including ROM and RAM) may be exchanged. More preferably, it is possible to switch to the latest data sequentially.
[0075]
Of course, each embodiment described above can be used in combination with any other embodiment. Furthermore, it is convenient to provide a communication function (serial communication or the like) with other microwave detectors so that the registered area information can be copied to the other microwave detectors.
[0076]
【The invention's effect】
As described above, the microwave detector according to the present invention is preferable because a necessary alarm can be output based on the position of the vehicle, and the driver can concentrate on driving.
[Brief description of the drawings]
FIG. 1 is a block circuit diagram showing a first embodiment of a microwave detector according to the present invention.
FIG. 2 is an internal structure diagram showing a main part.
FIG. 3 is an example of a data structure of a region information storage unit.
FIG. 4 is an internal structure diagram showing a main part of a second embodiment of a microwave detector according to the present invention.
FIG. 5 is an internal structure diagram showing a main part of a third embodiment of a microwave detector according to the present invention.
FIG. 6 is a diagram for explaining a usage example of the fourth embodiment of the microwave detector according to the present invention;
FIG. 7 is an internal structure diagram showing a main part of a fifth embodiment of a microwave detector according to the present invention.
[Explanation of symbols]
1 Microwave detector
2 Microwave detector body
2a Horn antenna
2b Microwave receiver
2c Reception determination unit
2d reception strength judgment unit
2e judgment part
2f Alarm
3 GPS receiver
3a Receiving antenna
3b GPS receiver
3c Location information calculation unit
3d vehicle speed judgment part
3e Traveling direction determination unit
5 Operation control unit
6 Instruction input part
6a Position memory command switch
6b Condition input switch
6c Confirm switch
6d area setting switch
7 processing section
7a Writing part
7b Reading unit
7c Setting command section
7d Alarm drive command section
8 memory
8a Setting condition storage
8b Area information storage unit
8c Map information storage unit
9 Control unit
10 Alarm
11 Infrared detector

Claims (7)

A microwave detector main body that detects a microwave and outputs an alarm based on predetermined operation setting conditions;
Position detecting means for determining the current position of the vehicle;
An area storage unit for storing area information for specifying a certain area;
Control means for determining whether or not the current position obtained by the position detection means is within an area specified by the area information stored in the area information storage unit, and for outputting an alarm if it exists; ,
A function of acquiring a current position when receiving a position storage command by the position detection unit, generating the area information based on the acquired current position and storing the area information in the area storage unit,
The storage of the region information in the region storage unit based on the position storage command is performed on condition that a predetermined microwave is detected and a registration confirmation command is received when the microwave is detected. A microwave detector characterized by being configured as described above. A sensor that detects infrared rays is provided.
The microwave detector according to claim 1, further comprising a function of generating the position storage command when a predetermined infrared ray is detected. 3. The microwave detector according to claim 1, wherein the region information is prepared in advance as basic region information. The microwave detector according to claim 3, wherein the basic area information is updateable. The microwave detector according to any one of claims 1 to 4, further comprising an erasing function for erasing at least part of the area information stored in the area information storage unit. Means for calculating the vehicle speed from the output of the position detection means;
The alarm output using at least the information stored in the area information storage unit is not performed when the calculated vehicle speed is equal to or lower than a certain speed. A microwave detector as described. The microwave detector according to any one of claims 1 to 6, wherein an alarm output range using information stored in the area information storage unit is changed according to a vehicle speed.

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