JPH0318124B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for determining the current position of a moving object such as an automobile;
The present invention relates to a driving route display device that displays driving conditions such as a driving trajectory and a traveling direction.

FIG. 1 shows an example of a basic configuration of a driving route display device according to the present invention, which includes a distance detector 1 that generates a pulse signal corresponding to the distance traveled by a car, and a distance detector 1 that detects, for example, angular velocity in the yaw direction. A direction detector 2, which is composed of a rate type gyroscope, etc., outputs a signal proportional to the direction or the amount of change in direction of the vehicle depending on the direction of travel of the vehicle, and a pulse signal from the distance detector 1 is counted to detect the direction of the vehicle. In addition to measuring the traveling distance, the traveling direction of the vehicle is determined from the output of the direction detector 2, and the position on the two-dimensional coordinates of the vehicle for each unit traveling distance is calculated according to the detection signals from both detectors 1 and 2. signal processing unit (CPU) that performs central control of the entire device.
3, and a travel trajectory memory that sequentially stores the constantly changing position data on the two-dimensional coordinates determined by the signal processing device 3 and holds it as finite continuous position information corresponding to the current position of the vehicle. A device (RAM) 4, and a CRT display device and a liquid crystal display device that constantly update and display the travel distance of the vehicle, the travel trajectory in a certain section up to the current position, the current direction of travel, etc. according to the output from the signal processing device 3. A display device 5 consisting of, etc., and a signal processing device 3
A display command is sent to the display device 5 to change the direction of the travel trajectory displayed on the display device 5, move the display position, enlarge display of a portion of the travel trajectory, change display format settings such as selection of display scale, and search for the travel trajectory. It is constituted by an operating device 6 that can be operated as appropriate.

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, the operating device 6
Accordingly, the starting point and the display scale of the display device 5 corresponding to the road map used for guidance are appropriately set. Afterwards,
When the car starts running, the distance detector 1 sends one pulse signal for each unit distance traveled to the signal processing device 3, which counts the number of pulses to measure the distance traveled.
The output of the direction detector 2 is also sent to a signal processing device 3, where the direction in which the vehicle is traveling at each moment is determined. The signal processing device 3 calculates the current position (x, y) on the X-Y coordinates in units of every moment according to a preset scaling factor based on the detected changes in the travel distance and direction of the vehicle as described above. It is obtained through arithmetic processing that adds vectors in the positive direction.

When the signal processing device 3 calculates the position on the two-dimensional coordinates for each unit mileage of the vehicle in accordance with the detection signals from the distance detector 1 and the direction detector 2, as shown in FIG. Assuming that the unit traveling distance is l, the current position is (x _o+1 , y _o+1 ), the previous position is (x _o , y _o ), and the current direction is θ, the current position is calculated according to the following formula. (x _o+1 , y _o+1 ) will be calculated.

x _o+1 = x _o +l・cosθ y _o+1 =y _o +l・sinθ……(1) Next, the sequentially calculated results are sent to the traveling trajectory storage device 4 and stored as finite position data. The stored contents are read out as appropriate and provided to the display device 4. At the same time, a direction signal at the current position is sequentially sent from the signal processing device 3 to the display device 5 for every unit traveling distance l. As shown in FIG. 2, the display device 5 includes a directional display mark M1 of the current position B and a travel trajectory display mark based on a polygonal line approximation using a unit vector from the starting point A to the current position B. M2 will be simulated to follow the driving conditions of the car.
Note that the display mark M1 of the current position B is determined by using a direction detection signal, for example, by providing a ROM in the signal processing device 3 that stores mark information such as a large number of triangular shapes, arrow shapes, etc. with various directions in advance. Using the address as the address, mark information with appropriate directionality is retrieved and sent to the display device 4, where it is displayed together with the current position. In addition, in order to be able to check the travel route midway through, a search mark M3 can be arbitrarily written on the travel trajectory display mark M2 displayed on the display device 5 by an operation instruction from the operation device 6. ing. Furthermore, as shown in FIG. 2, the display device 5 displays
According to the signal sent from the signal processing device 3,
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 when traveling in the signal processing device 3), a display D2 of the total distance traveled up to that point, or Operating device 6
Auxiliary displays such as a display D3 of the scale factor set by , etc. are made as appropriate. Note that the display device 5 has a limit to the traveling trajectory displayed on it, so when the limit is exceeded, a new starting point A' is set using the operating device 6 (at this time, the traveling trajectory storage device 4 stores the (Contents will be cleared) This will allow you to continue driving.

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 determine which road the vehicle is traveling on and where the current location is. This makes it easier to confirm.

The present invention provides such a driving route display device that can display an optimal driving route even when the vehicle is traveling in reverse.

That is, in the driving route display device according to the present invention, as shown in FIG. 4, a sensor 7 is provided for detecting that the vehicle is in the reverse condition from, for example, a reverse gear signal or a reverse light signal. The processing device 3 treats each value of l·cosθ and l·sinθ in the equation (1) obtained at that time as negative, and calculates the current position (X _o+1 , Y _o+1 ) in the negative direction vectorwise. I'm trying to get it to do the calculations. Therefore, the driving route is displayed using a negative unit vector in accordance with the state in which the vehicle backs up.

As described above, in the traveling route display device according to the present invention, the travel route display device according to the present invention detects the travel distance of the moving body based on the output of the distance detector that detects the travel distance of each unit of the mobile body, and the output of the direction detector that detects the direction accompanying the travel. The position on the dimensional coordinates is cumulatively calculated by adding unit belts in the positive direction, and the traveling trajectory of the moving body is displayed on the screen using the calculated position data that changes every moment. A sensor is installed to detect the backward running state of a moving object, and the current position value in the negative direction is calculated vector-wise according to the sensor output. It has the excellent advantage of being able to display routes.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the configuration of a driving route display device according to the present invention, FIG. 2 is a diagram showing an example of a display form in the driving route display device, and FIG. 3 is an example of a driving route in vector display. A diagram showing
FIG. 4 is a block diagram showing one embodiment of the present invention. 1... Distance detector, 2... Direction detector, 3...
Signal processing device, 4...Travel trajectory storage device, 5...
Display device, 6... operating device, 7... back state detection sensor.

Claims (1)

[Claims] 1. A distance detector that detects the traveling distance of each unit of a moving object, a direction detector that detects the direction of the moving object, a sensor that detects the backward running state of the moving object, and the distance detector and direction detector. Based on each detection output of the sensor, the current position on the two-dimensional coordinates of the moving object is cumulatively calculated by adding unit vectors in the positive direction, and the current position of the moving object is calculated vectorially according to the detection output of the sensor. A signal processing device that calculates the current position in the negative direction, a storage device that sequentially stores data on the calculated current position that changes every moment as the moving object moves, and a signal processing device that calculates the current position of the moving object based on the stored data. A driving route display device configured by a display device that displays a driving trajectory of a person on a screen.