JPS6222086B2 - - 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, the current road map is displayed on the driver's seat in order to provide appropriate guidance so that the driver does not deviate from the planned course and get lost. Devices that display information such as location have been developed.

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.

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

As shown in FIG. 1, the travel route display device according to the present invention is housed in a constant temperature control tank 1 heated by a heater, and is equipped with a gas gas that outputs a signal proportional to the direction or the amount of change in direction depending on the direction of travel of the vehicle. A rate sensor 2, a distance sensor 3 that generates a signal according to the distance traveled by the car, and a calculation to calculate the position on the two-dimensional coordinates of the car for each unit distance traveled according to the output of each of these sensors. The data on the two-dimensional coordinates that change every moment is stored and held as finite continuous position information corresponding to the driving route of the car, and the signal processing device 4 centrally controls the entire device, and the signal processing device 4 controls the processing output. Accordingly, the display device 5 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, and a display command is given to display the display form (of the travel trajectory) on the display device 5. The operation switch board 6 consists of a digital code switch that can change the settings (position conversion, display scale, etc.) and adjust the output sensitivity of the gas rate sensor 2 as appropriate, and the battery power supply E connects the ignition switch IG/SW and Connected via fuse F, its ignition switch IG
A power supply circuit 7 controls the energization of the heater of the constant temperature control tank 1 in conjunction with the opening and closing of the SW, and transmits the operation contents of the operation switch board 6 as an encoded signal to the signal processing device 4. It is composed of an operation switch encoder and an energization control device 8 for controlling energization.

The 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 distance traveled is measured, and the output of the gas rate sensor output 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. Therefore, the display device 5 displays the second
As shown in the figure, from the directional display mark M1 of the current position B and the starting point A to the current position B
The driving trajectory display mark M2 up to the point M2 is displayed in a simulative manner, following the driving state of the automobile. In addition, as shown in FIG. 2, the display device 5 displays
According to the signal sent from the signal processing device 4,
For example, a display D1 of the time required to travel to the current position B (this can be done by incorporating a timer that operates only while driving in the signal processing device 4), a display D2 of the total distance traveled up to that point, or Auxiliary displays such as a display D3 of the scale set by the operation switch board 6 are made 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 circuit 7, and the power circuit 7 is turned off for a preset period of time. The heater of the constant temperature control tank 1 is continuously energized to maintain the temperature inside the constant temperature control tank 1 constant, and an alarm such as a buzzer is operated to notify the effect.

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.

FIG. 3 shows a specific example of the configuration of the power supply circuit 7, which includes a relay RL provided to open and close the main circuit connecting the battery power supply E to the constant temperature control tank 1, and a battery power supply circuit 7. A relay energizing circuit that energizes the coil of the relay RL from a power source E through an ignition switch IG/SW and a diode D1, and an ignition switch.
Detects the open/closed state of IG/SW and its detection signal D
Operation switch encode and energization control device 8
An ignition switch open/close detection circuit consisting of voltage dividing resistors R1, R2, transistor Q1, and resistor R3, and when the detection circuit detects the opening of the ignition switch IG/SW, the operation switch encoder and energization control device 8 Resistors R4 and R5, and transistor Q2, which cause the relay RL to self-hold according to the holding command H issued from the
and a relay self-holding circuit consisting of a diode D2, and a component that supplies battery power E to a buzzer BZ in response to an alarm command A issued from an operation switch encoder and energization control device 8 when an open ignition switch IG/SW is detected. Piezo resistance R
6, R7, and a buzzer control circuit consisting of a transistor Q3.

In the power supply circuit 7 configured in this way,
When the car is running (ignition switch IG/
(SW is closed), the coil of relay RL is energized through the relay energizing circuit, and the battery power supply E is supplied to constant temperature control tank 1 through its a contact, and the heater is energized to raise the internal temperature. It is heated to a constant level at all times. In such a state, when the ignition switch IG/SW is opened to temporarily park the car, it is detected by the detection circuit consisting of the transistor Q1, and the detection signal "0" (IG/SW When the switch is closed, the signal becomes "1") is sent to the operation switch encode and energization control device 8, and a hold command H is issued to the power supply circuit 7 for a preset time (5 to 10 minutes). It will be.
The power supply circuit 7 turns on the transistor Q2 in response to the holding command, thereby forming a self-holding circuit for the relay RL and continuing to energize the relay RL.
The heater in the constant temperature control tank 1 is continuously energized. At the same time, an alarm command A is sent from the operation switch encoder and energization control device 8 to the power supply circuit 7.
is issued, and in the power supply circuit 7, the transistor Q3 in the buzzer control circuit is turned on in response to the command A, and the buzzer BZ is operated. When the ignition switch IG/SW is closed again within the scheduled time, the relay RZ is directly energized through the relay energizing circuit, thereby supplying the battery power E to the constant temperature control tank 1 and supplying power to the heater. energization is performed continuously. Furthermore, if the ignition switch IG/SW is still not closed within the scheduled time, the self-holding circuit of the relay RL is opened after that time has elapsed, thereby stopping the supply of battery power E to the constant temperature control chamber 1. It will stop.

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 position on the two-dimensional coordinates for each distance traveled is determined by calculation, and the continuous traveling trajectory of the moving body is displayed on the screen while the data of the determined position that changes every moment is stored sequentially. A gas rate sensor is installed in a constant temperature control tank using electric heating, and detects the open/closed state of the ignition switch, and when the ignition switch is closed, electricity is directly applied to the constant temperature control tank via a relay, and when it is opened, Sometimes, the constant temperature control tank is energized through the self-holding circuit of the relay, which is maintained for a predetermined period of time, and is equipped with a power supply circuit that operates an alarm when necessary, and is not affected by changes in external temperature. The gas rate sensor can detect the direction with high accuracy and display the driving route accurately, and even when the ignition switch is turned off when the vehicle is temporarily parked, the constant temperature control tank continues to be energized for a certain period of time. This has the excellent advantage of being able to display an accurate travel route immediately upon restart.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing one embodiment of the travel route display device according to the present invention, FIG. 2 is a diagram showing one display form of the display device in the same embodiment, and FIG. 3 is a diagram of the power supply circuit in the same embodiment. FIG. 2 is an electrical wiring diagram showing a specific example of the configuration. 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. A position on two-dimensional coordinates for each unit traveling distance of a moving body based on a distance sensor output that detects the traveling distance of the moving body and a gas rate sensor output that detects the direction accompanying the traveling. is determined by calculation, and the continuous traveling trajectory of the moving body is displayed on the screen while sequentially storing the data of the determined position that changes every moment. It detects the open/closed state of the ignition switch, and when it is closed, the constant temperature control tank is energized directly via the relay, and when it is opened, the constant temperature control tank is energized for the required time. A travel route display device characterized in that a power supply circuit is provided that allows power to be supplied through a self-holding circuit of the relay that is held. 2. The travel route display device according to item 1 above, wherein an alarm is operated by a self-holding current of the relay when an ignition switch is opened.