JPS6255601B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a travel route display device for displaying the travel status of a moving body such as an automobile, such as the current position, travel trajectory, and direction of travel.

In general, when driving at night or in unfamiliar areas, a road map is installed in the driver's seat in advance to provide appropriate guidance so that the driver does not deviate from the planned course and get lost. A device has been developed that displays information such as the current location.

Conventionally, in this type of travel route display device,
A distance detector detects the traveling distance of the vehicle according to the vehicle speed, and a rate-type direction detector that detects the angular velocity of change in the yaw direction detects the direction and the amount of change in the direction of travel of the vehicle. The current position of the vehicle on the travel route is calculated from the detected value, and the result is displayed on the road map as point information that changes every moment.

In this case, it is conceivable to use a gas rate sensor as a direction detector, which is more resistant to vibration than a gyroscope, has good sensitivity, and is highly responsive. Since the angular velocity at that time is detected based on the slight difference in the amount of heat sensitive by the flow sensor in response to changes in Therefore, it is disadvantageous to use it as is in a car or the like.

The present invention has been made with these points in mind.The gas rate sensor is installed in a constant temperature control tank heated by a heater so that it is not affected by external temperature changes, and the ignition sensor is The present invention provides a travel route display device that optimally controls the heater's energization in conjunction with the opening and closing of a switch.

In particular, in the driving route display device according to the present invention, when the device is started, the driving route display is on standby until the temperature in the constant temperature control tank rises to a stable state, and if necessary, the display in the constant temperature control tank is After stabilization, offset adjustment of the gas rate sensor output is automatically performed to start displaying a highly accurate travel route.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the basic configuration of the driving route display device according to the present invention is housed in a constant temperature control tank 1 heated by a heater, and is proportional to the direction or the amount of direction change depending on the direction of travel of the vehicle. A gas rate sensor 2 outputs a signal corresponding to the distance traveled by the vehicle, a distance sensor 3 generates a signal corresponding to the distance traveled by the vehicle, and a position on two-dimensional coordinates for each unit distance traveled by the vehicle is calculated based on the output of each sensor. Turn and seek;
A signal processing device (CPU) that stores the data on the two-dimensional coordinates that changes from moment to moment and holds it as finite continuous position information corresponding to the driving route of the car, as well as centrally controlling the entire device.
4, a display device 5 that updates and displays the travel trajectory, current direction of travel, travel distance, required time, etc. in a certain section up to the current location of the vehicle in accordance with the processing output;
Changing the display format (position conversion of travel trajectory, display scale, etc.) and gas rate sensor 2
An operation switch panel 6 consisting of a digital code switch that can adjust the output sensitivity as appropriate.
and the battery power supply E is the ignition switch.
A power supply circuit 7 which is connected via an IG/SW and a fuse F and controls the supply of electricity to the heater of the constant temperature control tank 1 in conjunction with the opening/closing of the ignition switch IG/SW, and the operation switch panel 6. The signal processing device 4 encodes the operation contents as an encoded signal.
It is constituted by an operation switch encoder and an energization control device 8 that transmits the power to the power supply circuit 7 and controls the energization of the power supply circuit 7.

The basic operation of the travel route display device according to the present invention configured as described above will be explained below.

First, when the car is running, a display command is given in advance via the operation switch panel 6, and a display device 5 corresponding to a road map used for guidance.
The starting point and the display scale are set as appropriate. After that, when the car starts running, one pulse signal is sent from the distance sensor 3 to the signal processing device 4 for each unit distance traveled.
By counting the number of pulses, the traveling distance is measured, and the output of the gas rate sensor 2 is also sent to the signal processing device 4, where the direction in which the vehicle is traveling at each moment is determined. In addition, at this time, the battery power supply E is connected to the constant temperature control tank 1 through the power supply circuit 7, and its internal temperature is kept constant, so that the gas rate sensor 2 is not affected by changes in the external temperature. It becomes possible to perform stable and accurate angular velocity detection. The signal processing device 4 calculates the current position (x,
y) is calculated moment by moment, and the calculation results are sequentially stored and retained. Note that the stored contents are constantly read out and continuously sent to the display device 5. At the same time, a direction signal at the current position is sequentially sent from the signal processing device 4 to the display device 5. As shown in FIG. 2, the display device 5 displays a directional display mark M1 of the current position B and a starting point A.
Travel trajectory display mark M from to its current position B
2 will be simulated to follow the driving conditions of the vehicle. The display device 5 also includes a second
As shown in the figure, in response to a signal sent from the signal processing device 4, for example, a display D1 of the required travel time to reach the current position B (this is displayed by the signal processing device 4) is displayed.
(It would be better to incorporate a timer that operates only while driving), and also display the total distance traveled up to that point D.
2, or a display D3 of the scale set by the operation switch board 6, etc., is displayed as appropriate.

In this way, by comparing the travel trajectory up to the current location displayed on the display device 5 with the road shape on the map, the driver can easily determine which road the vehicle is traveling on. becomes possible.

Also, when the ignition switch IG/SW is turned off for temporary parking such as refueling while driving, this is detected by the power supply circuit 7, and the power supply circuit 7 is turned off for a preset period of time. The heater of the constant temperature control tank 1 is continuously energized, and the temperature inside the constant temperature control tank 1 is kept constant during that time, and an alarm such as a buzzer is operated to notify the same.

Therefore, when the vehicle is restarted to run again within the certain period of time, the accurate driving route can be immediately and continuously displayed without requiring a waiting time until the temperature in the constant temperature control tank 1 becomes stable. You will be able to do this. In addition, in this case, the alarm is activated to allow the driver to confirm acceptance of the heater being energized, thereby preventing unnecessary power consumption due to forgetting to turn off the main switch of the driving route display device. become.

In such a travel route display device, especially in the present invention, a temperature sensor 9 for detecting the temperature inside the constant temperature control tank 1 is provided inside the device, and the sensor 9
The output of is given to the signal processing device 4, and the signal processing device 4
Thereby, it is determined whether the temperature in the constant temperature control tank 1 is in a stable state or not, and if it is still in an unstable state, the travel route display on the display device 5 is set to a standby state, and the display is The device 5 is configured to display an indicator of the temperature state in the constant temperature control tank as shown in FIG. 3a.

That is, when starting electricity to the constant temperature control tank 1 at the time of starting the car after parking it for a long time, it takes time for the temperature in the constant temperature control tank 1 to stabilize to a constant state, and during that time, the gas rate sensor 2 becomes unstable, and the error in displaying the running route at that time becomes large. I have to. At the same time, the indicator display data stored in the signal processing device 4 in advance is sent to the display device 5 to display an indicator as shown in FIG. is moved along the scale at a predetermined rate according to the indicator, thereby displaying the temperature state in the constant temperature control tank.

Further, when the signal processing device 4 determines that the internal temperature of the constant temperature control tank 1 has reached a stable state, the character "OK" is displayed blinking on the screen of the display device 5 as shown in FIG. 3b. to notify the driver of this fact. In response to this, once the driver stops the vehicle, the prohibition of displaying the driving route is lifted, and the signal processing device 4 automatically adjusts the offset of the output of the gas rate sensor 2 at that time, so that the vehicle will be able to continue driving. The route can be displayed.

In this manner, the driving route display device according to the present invention waits to display the driving route until the temperature in the constant temperature control tank 1 stabilizes when the vehicle is started. This makes it possible to reliably prevent the driver from giving inaccurate guidance.

As described above, in the driving route display device according to the present invention, the unit of the moving object is determined based on the distance sensor output that detects the distance traveled by a moving object such as a car, and the gas rate sensor output that detects the direction accompanying the movement. The above-mentioned system which calculates the position on the two-dimensional coordinates for each distance traveled by calculation, and displays the continuous traveling trajectory of the moving body on the screen while sequentially storing the data of the determined position that changes every moment. The gas rate sensor is installed in a constant temperature control tank that energizes the heater when the ignition switch is turned on, and the travel route display is on standby until the temperature in the constant temperature control tank rises to a stable state, and when it is stable, it is displayed. It is possible to release the display and start displaying the subsequent driving route, and the gas rate sensor allows highly accurate direction detection without being affected by changes in external temperature and when the ambient temperature is stable. It has the excellent advantage of being able to display accurate travel routes at all times.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing an embodiment of the driving route display device according to the present invention, FIG. 2 is a diagram showing an example of the driving route display form of the display device in the same embodiment, and FIGS. 3a and 3b are the same. FIG. 6 is a diagram showing one form of indicator display when the temperature in the constant temperature control tank is unstable and when it is stable. 1... Constant temperature control tank, 2... Gas rate sensor,
3...Distance sensor, 4...Signal processing device, 5...
Display device, 6... Operation switch board, 7... Power supply circuit, 8... Operation switch encoder and energization control device.

Claims (1)

[Claims] 1. On the basis of the output of a distance sensor that detects the distance traveled by the moving body and the output of the gas rate sensor that detects the direction of travel of the moving body, two-dimensional coordinates for each unit traveling distance of the moving body The gas rate sensor is installed inside a thermostatically controlled tank heated by a heater, in which the position of the gas rate sensor is determined by calculation and the travel trajectory is displayed on the screen according to the determined position data that changes every moment. A driving route display device characterized in that the driving route display device takes means for displaying the driving route on standby until the temperature in the constant temperature control tank rises to a stable state. 2. The description of item 1 above, characterized in that the temperature state in the constant temperature control tank is displayed on the screen during a standby state for displaying the travel route until the temperature in the constant temperature control tank stabilizes. A driving route display device.