JP3078154U - Automatic map search device with vehicle speed measurement device detection function - Google Patents

Abstract

(57) [Summary] To provide an automatic map search device with a vehicle speed measurement device detection function. A vehicle speed measurement device detection unit includes a radar receiver unit, a GPS receiver unit, a calculation control unit, and the like. The display control unit 16 includes a data input conversion unit, a control unit, an input / output device control device, various input / output devices, and a storage device. The vehicle speed measurement device detection unit 10 and the display control unit 16 are connected via a data transmission unit 17 and a data reception unit 18 that perform wireless communication. The current position of the vehicle is obtained from the latitude and longitude obtained from the GPS receiver, and the information is used for the vehicle speed measurement device detection device and the automatic map search device.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an automatic map search device having a vehicle speed measurement device detection function using a GPS (Global Positioning System).

[0002]

[Prior art]

 Conventionally, an in-vehicle navigation device is mounted on a moving body such as an automobile. By inputting a departure place and a destination from an input device, a guidance route connecting the departure place to the destination by an optimal route is automatically set. Some are set on the display and displayed on a display device such as an LCD (Liquid Crystal Display). A GPS receiver is used as the vehicle position detection means. A CD-ROM (read-only compact disk memory) serving as map information storage means, a CD-ROM driver for driving the CD-ROM to read map information and related information, and inputting a departure place and a destination. It comprises an input device such as a keyboard, a display device, a speaker as audio output means for outputting audio information, a CPU, a RAM as storage and a work area for the CPU, and a microprocessor for controlling the entire device. It is common to have an information processing device.

The GPS receiver measures the current position of a moving object such as an automobile by GPS. For example, the GPS receiver receives navigation radio waves transmitted wirelessly from four GPS satellites to the ground, and detects the current position of the vehicle. The position (own vehicle position) is detected.

[0004] In other words, the GPS receiver and the GPS artificial satellite each have a built-in high-precision clock such as an atomic oscillator such as cesium, and the GPS artificial satellite transmits the radio wave transmission time and the orbit information of the orbit around the earth. The distance between the receivers can be detected by receiving them as radio waves by a GPS receiver and measuring the arrival time of the received radio waves with a clock built in the GPS receiver. When the distance from one GPS satellite is known, the receiving point is located on one of the spherical surfaces around the GPS satellite.

[0005] Therefore, for example, by receiving similar navigation radio waves from four GPS satellites, the intersection of each spherical surface can be set as a reception position, and the current position can be detected by three-dimensional coordinates. it can. The greatest feature of this GPS navigation is that it can detect the receiving position anywhere in the world.

[0006] The detection device of the vehicle speed measurement device is a device that detects a vehicle speed measurement device including a speed radar that externally measures the speed of the vehicle. Such a device is mounted on a moving object such as a car, and when a microwave emitted from a speed radar is received to measure the speed of the vehicle, a warning is issued and the driver is warned in advance. It is.

The vehicle speed measuring device is not limited to a device using radio waves such as the above-mentioned speed radar. For example, there is one that uses an electromagnetic effect between a loop coil buried under two road surfaces at predetermined intervals along a traveling lane and a vehicle passing therethrough. In addition, a light receiving element and a light emitting element are arranged opposite to each other at two places at a fixed interval along the traveling lane with the traveling lane interposed therebetween, and a vehicle passing between the light receiving and emitting elements emits light from each light emitting element. In some cases, light blocking is detected by each light receiving element.

[0008]

[Problems to be solved by the invention]

 The in-vehicle navigation device requires various devices, such as a GPS receiver, and is expensive. In addition, it is necessary to provide signal lines for connecting the various devices and wiring of a power supply inside a narrow car.

[0009] Further, the detection device of the vehicle speed measurement device cannot detect all the vehicle speed measurement devices only with the speed radar detector as described above, and is sufficient as a detection device of the vehicle speed measurement device. Rather, there has been a request for improvement in this regard. As means for solving such a problem, there is, for example, Japanese Utility Model Registration No. 3070388 “Vehicle speed measurement device detection system”. This system is applicable to any vehicle speed measurement device (the operating principle of the vehicle speed measurement device). The present invention provides a detection device for a vehicle speed measurement device capable of detecting the detection.

An object of the present invention is to solve the above-mentioned problem and to provide a vehicle speed measuring device as an automatic map searching device having a function of detecting by utilizing the GPS positioning means of the vehicle speed detecting device as an automatic map searching device. It was done.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an automatic map search device having a vehicle speed measurement device detection function according to claim 1 and a GPS positioning means for obtaining a current position using at least a GPS signal transmitted from a GPS satellite. Information input means provided, map storage means in which map information is readablely stored, and display control means for displaying the current position obtained by the information input means together with the map information read from the map storage means. A control unit that transmits the latitude and longitude data obtained by the GPS positioning unit in the information input unit to the display control unit; an installation position data storage unit that stores an installation position of a vehicle speed measurement device that measures a vehicle speed; By comparing the installation position data stored in the installation position data storage means with the current position data obtained by the GPS positioning means, the current position is compared. Detection signal output means for outputting a vehicle speed measurement device detection signal as a notification unit driving signal when the vehicle approaches within a preset distance from the installation position of any vehicle speed measurement device, and the detection signal output means A notifying unit for notifying that the vehicle speed measuring device has been detected in response to the notifying unit driving signal from the control unit, and latitude and longitude data obtained by the GPS positioning unit in the information input unit from the control unit. The control means is provided with means for transmitting by wireless communication.

[0012] In the automatic map search device having the vehicle speed measurement device detection function according to claim 2, the information input means includes: a GPS positioning means for obtaining a current position using a GPS signal transmitted from a GPS satellite; A radar receiver that outputs a microwave reception detection signal when receiving a microwave of a specific frequency from a speed radar that measures speed externally.

[0013]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall block diagram of an embodiment of the present invention. FIG. 2 shows an embodiment of a vehicle speed measuring device detecting unit and a data transmitting unit, FIG. 3 shows an embodiment of a data receiving unit and a display control unit, and FIG. 4 shows another embodiment of a vehicle speed measuring device detecting unit and a data transmitting unit. FIG.

In FIG. 1, the block diagram of the embodiment of the present invention comprises a vehicle speed measuring device detection unit 10, a data transmission unit 17, a data reception unit 18, and a display control unit 16. The vehicle speed measurement device detection unit 10 includes GPS positioning means for obtaining a current position using at least a GPS signal transmitted from a GPS satellite, and detects the vehicle speed measurement device using data obtained by the positioning means. It operates as a device and transmits to the data receiving unit 18 via the data transmitting unit 17 in a wireless manner. The data received by the data receiving unit 18 is stored in a control unit (not shown) in the display control unit 16, a display device such as a CRT (cathode ray tube) or an LCD (liquid crystal display device), and a storage device in a map storage unit. It operates as an automatic map search device using such as.

In FIG. 2, the vehicle speed measurement device detection unit 10 includes a radar receiver unit 11, a GPS receiver unit 12, an arithmetic control unit 13, a signal output unit 14 and a notification unit 15, and a pushbutton switch 16 for storing an erroneous notification position. It is provided with.

The radar receiver section 11 outputs a microwave reception detection signal when receiving a microwave of a specific frequency from a speed radar (not shown), and includes a horn antenna 11a and a microwave receiver 11b. . The sensitivity of microwave reception is set in advance or can be adjusted appropriately.

The GPS receiver section 12 receives a GPS radio wave of a specific frequency from a satellite and obtains the current position data of the vehicle equipped with the present invention in latitude and longitude. The GPS receiver section 12 receives the GPS antenna signal from the plane antenna 12a and the GPS receiver 12b. Become.

The arithmetic and control unit 13 stores each of the installation position data in the installation position data group of the vehicle speed measurement device (not shown) such as the speed radar stored in the built-in storage device 13a in advance and the current position. By comparing the data with the data, a vehicle speed measurement device detection signal is output when the current position approaches within a preset distance, for example, 1 km to 500 m from the installation position of any vehicle speed measurement device. . Furthermore, the current position data including the latitude and longitude obtained from the GPS receiver unit 12 is output to the data transmission unit 17.

The arithmetic control unit 13 includes the storage device 13a and an MPU (microprocessor unit) 13b. The storage device 13a here comprises a ROM 13a1 and a RAM 13a2, and the installation position data group of the vehicle speed measurement device is stored in the ROM 13a1.

Further, the ROM 13a1 is constituted by an EEPROM or the like here, and can be updated to the latest installation position data group of the vehicle speed measuring device by rewriting the stored contents. Writing of data to the ROM (EEPROM) 13a1 for performing this update is performed by a known method using data sent through the external data input terminal 13c. The ROM 13a1 also stores an execution program for the vehicle speed measurement device detection unit 10 and an execution program for outputting the current position data to the data transmission unit 17 and transmitting the data to the data reception unit 18.

Further, arbitrary data and programs can be written in the RAM 13a2. This writing is also performed on the data sent via the external data input terminal 13c by a known method as necessary. The RAM 13a2 is also used as a work area when executing various programs.

The arithmetic control unit 13 is connected to a pushbutton switch 16 for storing an erroneous notification position. The push button switch 16 for storing a false notification position causes the arithmetic control unit 13 to store the position (current position) obtained by the GPS receiver unit 12 when pressed. The arithmetic and control unit 13 thereafter invalidates the microwave reception detection signal from the radar receiver unit 11 within a preset distance from the stored position and prohibits a notification operation to be described later. .

The signal output unit 14 receives the detection signal from the arithmetic and control unit 13 regardless of the presence or absence of the microwave reception detection signal from the radar receiver unit 11 or detects the detection signal only from the radar receiver unit 11. When it receives the signal, it outputs a notification unit drive signal.

The notification unit 15 receives the notification unit driving signal from the signal output unit 14 and notifies the outside that the vehicle speed measurement device has been detected. For example, an amplifier 15 a for performing the notification audibly. And an electric signal / sound converter 15b such as a buzzer or a speaker, and an LED lamp 15c for visually giving notification.

The notification is performed from the electric signal / sound converter 15b by a continuous sound, an intermittent sound or a melody sound if the sound is a buzzer or a speaker, an appropriate warning message sound from the electric signal / sound converter 15b, and an LED lamp. From 15c, the light is turned on and off or blinks. When the notification is made by voice, voice data and a voice synthesizer are added to the arithmetic control unit 13 and the like.

The data transmission unit 17 performs wireless communication using radio waves, infrared rays, an electromagnetic coupling method, or the like. In the case of radio waves, an antenna and a transmitter for transmitting radio waves are provided. When using infrared light, an infrared transmitter that emits infrared light is provided. Further, in the case of the electromagnetic coupling method, for example, a loop coil for generating an electromagnetic wave is provided.

The control of the transmitter is performed by the arithmetic and control unit 13. That is, the current position data consisting of the latitude and longitude obtained from the GPS receiver section 12 is added to the signal line D1, and a control signal for transmitting data from the transmitter is added to the signal line C1 to perform data transmission. The radio and infrared transmitters and the electromagnetic coupling system can be realized by well-known methods and will not be described in detail.

In FIG. 3, the display control unit 16 includes a data input conversion unit 30, a control unit 31, an input / output device control device 32, various input / output devices, and a storage device. Further, a data receiving unit 18 is connected to the display control unit 16.

The data input conversion unit 30 converts the current position data received by the data reception unit 18 by a predetermined method. The control means 31 controls a control section 31a composed of a microprocessor, a read-only memory (ROM) 31b storing a program for controlling the display control section 16 and various data necessary for control, and a display control section 16. And a readable and readable (RAM) 31c for storing various types of data.

The control means 31 controls the input / output device control device 32 according to a program stored in the ROM 31b. The input / output device control device 32 is connected to a speaker 34 serving as an audio output unit for outputting audio information, a display device 37 such as a CRT (cathode ray tube) or an LCD (liquid crystal display device), and a storage device 38 of a map storage unit. Have been.

The data receiving unit 18 performs wireless communication using radio waves, infrared rays, an electromagnetic coupling method, or the like. In the case of radio waves, an antenna and a transmitter for transmitting radio waves are provided. When using infrared light, an infrared transmitter that emits infrared light is provided. Further, in the case of the electromagnetic coupling method, for example, a loop coil for generating an electromagnetic wave is provided.

In FIG. 3, the display control unit 16, the data input conversion unit 30, the control unit 31, the input / output device control device 32, various input / output devices, storage devices, and the data reception unit 18 are a notebook personal computer or the like. The vehicle may be connected to various input / output methods to obtain the vehicle speed and angle of the vehicle.

In FIG. 4, the vehicle speed measurement device detection unit 10 includes a GPS receiver unit 12, an arithmetic control unit 13, a notification unit 15, and an erroneous notification position storage push button switch 16.

FIG. 4 shows a configuration in which the functions of the radar receiver unit 11 and the signal output unit 14 in FIG. 2 are excluded, and the rest is the same as FIG. That is, when the vehicle speed measurement device detection signal is received from the arithmetic and control unit 13 irrespective of the presence or absence of the microwave reception detection signal from the radar receiver unit 11, or when the detection signal is received only from the radar receiver unit 11, the notification unit is provided. There is no signal output unit 14 for outputting a driving signal, and the notification unit 15 is directly connected to the arithmetic control unit 13 and is controlled by the arithmetic control unit 13.

The operation of the present invention in such a configuration will be described below. The operation of the vehicle speed measurement device detection unit in the present invention is described in detail in Utility Model Registration No. 3070388 Publication “Vehicle Speed Measurement Device Detection System”. The operation will be described with reference to FIG. As for the on-vehicle navigation device, various well-known methods have been described in detail, and the description thereof will be omitted.

First, the operation when the vehicle speed measurement device is installed at a predetermined location will be described. The current position data (latitude and longitude) of the vehicle is constantly output from the GPS receiver unit 12, and the arithmetic and control unit 13 determines the current position data and each of the installation position data groups of the vehicle speed measurement device from the ROM 13a. It is compared with the installation position data. Then, when the current position approaches within 1 km to 500 m from the installation position of any vehicle speed measurement device, the arithmetic and control unit 13 outputs a vehicle speed measurement device detection signal.

When the signal output unit 14 receives the vehicle speed measurement device detection signal from the arithmetic and control unit 13, it outputs a notification unit driving signal to the notification unit 15, and generates an alarm sound from the electric signal / sound converter 15 b and The LED lamp 15c is turned on, and the fact that the vehicle speed measurement device has been detected is externally and audibly and visually notified.

At this time, if the detected vehicle speed measurement device is a speed radar (not shown), a detection signal (microwave reception detection signal) is also output from the radar receiver unit 11, but the detection signal is The notification operation is performed by both the signal from the GPS and the signal from the radar receiver.

Next, a notification operation based on a microwave reception detection signal when a speed radar is installed will be described. For example, when a mobile type speed radar is installed, when the radar receiver 11 receives a microwave from the speed radar while the vehicle is traveling, the radar receiver 11 outputs a microwave reception detection signal.

When the signal output unit 14 receives the microwave reception detection signal from the radar receiver unit 11, it outputs a notification unit driving signal to the notification unit 15 and generates an alarm sound from the electric signal / sound converter 15b. At the same time, the LED lamp 15c is turned on to notify the outside that the speed radar has been detected. At this time, if the content of the notification is different from the content of the notification by the vehicle speed measurement device detection signal from the arithmetic and control unit 13, it is clearly notified that the radar receiver unit 11 detects the speed radar.

Here, there is a case where it is considered that the radar receiver unit 11 operates with a radio wave other than the microwaves emitted from the speed radar to output a microwave reception detection signal, and performs a notification operation (erroneous notification). . For example, there is a sensor unit such as an automatic door switch that uses a radio wave similar to a microwave emitted from a speed radar, and this radio wave is received by the radar receiver unit 11.

In such a case, when an erroneous notification is made, the erroneous notification position storage push button switch 16 is pressed to cope with the erroneous notification. That is, when the false notification position storage push button switch 16 is pressed, the arithmetic control unit 13 stores the position (current position) obtained by the GPS receiver unit 12 at that time in the storage device 13a, and thereafter stores the position in the storage position. The notification operation of the notification unit 15 is prohibited even if the microwave reception detection signal is output from the radar receiver unit 11 when approaching within a preset distance. Therefore, the driver will be notified only when the speed radar is present, and will not be confused by the notification operation (erroneous notification) by useless radio waves.

Hereinafter, the operation of the present invention will be described with reference to FIG. The vehicle speed measurement device detection unit 10 operates as a vehicle speed measurement device detection device described in detail in Japanese Utility Model Registration No. 3070388, “Vehicle Speed Measurement Device Detection System”, and also as an automatic map search device. Operate. The current position data including the latitude and longitude data obtained from the information input means provided with the GPS positioning means (not shown) in the vehicle speed measurement device detection unit 10 is transmitted to the data transmission unit 17. Such transmission uses radio waves or wireless communication using infrared rays, electromagnetic coupling, or the like.

The current position data transmitted from the data transmission unit 17 by wireless communication is transmitted to the display control unit 16 via the data reception unit 18. The display control unit 16 reads the current position data, map information (not shown) provided in the display control unit 16, and stores the current position from the map storage unit. The position of the vehicle is displayed by display control means (not shown) which is displayed together with the map information, and operates as an automatic map search device.

The vehicle speed measurement device detection unit 10 operates as follows to cause the display control unit 16 to operate as an automatic map search device. That is, it is assumed that a vehicle equipped with the present invention device is traveling on a road. At this time, the current position data (latitude, longitude) of the vehicle is constantly output from the GPS receiver unit 12, and the arithmetic control unit 13 always stores the current position data in the RAM 13a2.

Such data is used by the arithmetic and control unit 13 in the vehicle speed measurement device detection unit 10 in the vehicle speed measurement device detection device and also in the automatic map search device.

The ROM 13 a 1 stores an execution program for the vehicle speed measurement device detection unit 10 and an execution program for outputting the current position data to the data transmission unit 17 and transmitting the data to the data reception unit 18. The MPU (microprocessor unit) 13b transmits the current position data (latitude and longitude) stored in the RAM 13a2 by the above-mentioned execution program to the data transmission unit 17 so that the display control unit 16 uses the data as an automatic map search device. The data is transmitted to the data receiving unit 18 via the data receiving unit 18.

The display control unit 16 converts the current position data (latitude and longitude) transmitted to the data receiving unit 18 into a data input through a control signal line C 2 of a control unit 31 a of a control unit 31 via a signal line D 2. Input to the unit 30. The data input converter 30 converts the current position data received by the data receiver 18 by a predetermined method. The converted data is stored in the RAM 31c of the control means 31.

The control means 31 obtains an accurate vehicle position from current position data (latitude and longitude) obtained from GPS satellites by a well-known vehicle position calculation method stored in the ROM 31b and stores it in the RAM 31c. .

The control unit 31a retrieves a map of a corresponding position stored in the storage device 38 of the map storage unit from the accurate vehicle position stored in the RAM 31c, and displays the vehicle position on the display device 37. By displaying them together, the device operates as an automatic map search device.

The vehicle speed measuring device includes a mobile device and a fixedly installed device. Regardless of the operating principle of the vehicle speed measurement device, the positions of all fixed vehicle speed measurement devices, that is, latitude and longitude, are fixed. Therefore, if the vehicle is notified when it approaches that position, it will notify all vehicle speed measurement devices that are fixedly installed, regardless of whether the vehicle speed measurement device is a speed radar. Detection is possible, which is sufficient as a detection device for a vehicle speed measurement device.

On the other hand, the current position (latitude, longitude) of the vehicle can be easily and accurately determined by using the GPS. Therefore, the current position data of the vehicle from the GPS receiver unit 12 is compared with each of the installation position data in the installation position data group of the vehicle speed measurement device stored in the storage device 13a in advance, and a predetermined range is set. If a match is detected within the above, the fact is notified to the outside, and even if there is no microwave reception detection signal from the radar receiver unit 11, the detection device of the vehicle speed measurement device can function sufficiently.

FIG. 4 is an embodiment made in consideration of the above points. That is, the display control unit 16 obtains data to be used as an automatic map search device from the GPS receiver unit 12, and the vehicle speed measurement device detection unit 10 uses the arithmetic control unit 13 to detect the vehicle speed measurement device. is there. For this reason, the radar receiver unit 11 is not necessary, and if the notification is made based on the current position data of the vehicle from the GPS receiver unit 12 as described above, the detection of the microwave reception from the radar receiver unit 11 can be performed. Even without a signal, it can function sufficiently as a detection device for a vehicle speed measurement device.

In FIG. 4, a method of operating as an automatic map search device using data received from the GPS receiver unit 12 is the same as that of FIG. 2, and a description thereof will be omitted.

The automatic map search device described above uses the data received from the GPS receiver unit 12 to determine the exact position of the vehicle stored in the RAM 31 c from the vehicle position corresponding to the vehicle position stored in the storage device 38 of the map storage unit. It operates to search for a map of the position and display it on the display device 37 together with the vehicle position.

However, the vehicle sometimes travels in a tunnel or a place where navigation radio waves transmitted wirelessly from the GPS satellite to the ground cannot reach. In such a case, the current position (latitude and longitude) of the vehicle obtained by receiving the GPS signal before the interruption is maintained as it is, so that the navigation radio waves transmitted wirelessly from the tunnel or other GPS satellites to the ground will arrive. It is possible to operate as an automatic map search device even when traveling in an unfamiliar place.

[0057]

[Effect of the invention]

 According to the automatic map search device with the vehicle speed measurement device detecting function of the first aspect, the GPS positioning means for obtaining the current position using the GPS signal transmitted from the GPS satellite is provided as a vehicle speed measurement device detection device and a vehicle-mounted device. By transmitting the latitude and longitude data obtained by the GPS positioning means by wireless communication from the control unit to the display control means, the expensive GPS positioning means can be used effectively and There is no need to provide signal lines for connecting the various devices and wiring of the power supply inside the vehicle. This has made it possible to reduce the size and cost of the device and move the automatic map search device out of the vehicle.

According to the vehicle speed measuring device of the second aspect, the information input means includes a GPS positioning means for obtaining a current position using a GPS signal transmitted from a GPS satellite. And a radar receiver that outputs a microwave reception detection signal when receiving a microwave of a specific frequency from a speed radar that externally measures the speed of the vehicle. The search device was realized at the same time.

[Brief description of the drawings]

FIG. 1 is an overall block diagram of an embodiment of the present invention.

FIG. 2 is an embodiment of a vehicle speed measurement device detection unit and a data transmission unit.

FIG. 3 is an embodiment of a data receiving unit and a display control unit.

FIG. 4 is a diagram showing another embodiment of a vehicle speed measurement device detection unit and a data transmission unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vehicle speed measuring device detection part 11 Radar receiver part 12 GPS receiver part 13 Operation control part 14 Signal output part 15 Notification part 16 False notification position storage pushbutton switch 17 Data transmission part 18 Data reception part 30 Data input conversion part 31 Control means 32 I / O device controller

Claims (2)

[Utility model registration claims] 1. A GP transmitted from at least a GPS satellite
Information input means having GPS positioning means for obtaining a current position using an S signal; map storage means in which map information is stored in a readable manner; and current position obtained by the information input means in the map storage means Display control means for displaying together with the map information read from the CPU, a control unit for transmitting the latitude and longitude data obtained by the GPS positioning means in the information input means to the display control means, and a vehicle speed measurement for measuring the speed of the vehicle An installation position data storage unit for storing the installation position of the device, and comparing the installation position data stored in the installation position data storage unit with the current position data obtained by the GPS positioning unit, A vehicle speed measurement device detection signal is output as a notification unit driving signal when the vehicle approaches within a preset distance from the installation position of the vehicle speed measurement device. A signal output unit, a notification unit that receives a notification unit driving signal from the detection signal output unit and notifies the outside that the vehicle speed measurement device has been detected, and a latitude and a longitude obtained by the GPS positioning unit in the information input unit. An automatic map search device with a vehicle speed measurement device detection function, comprising: means for transmitting longitude data from the control unit to the display control means by wireless communication. 2. An information input means receives a GPS positioning means for obtaining a current position using a GPS signal transmitted from a GPS satellite, and a microwave of a specific frequency from a speed radar for externally measuring the speed of a vehicle. 2. The automatic map search device with a vehicle speed measurement device detection function according to claim 1, further comprising: a radar receiver unit that outputs a microwave reception detection signal when the detection is performed.