JPH0877500A - Optical measuring instrument - Google Patents

Abstract

PURPOSE: To provide the optical measuring instrument which generates an alarm more effectively by facilitating the operability of settings of an alarm in case of a rear-red collision and generates an alarm corresponding to a driver. CONSTITUTION: The optical measuring instrument is mounted on a vehicle and measures the distance from the vehicle to a body to be measured on the basis of the time from irradiation with laser light, etc., until the photodetection of reflected light reflected by the body to be measured; and display interval time of alarming and data for setting the ON or OFF state of a sound at the time of alarming are inputted from outside through data input means 34, 35, and 36. The inputted data are displayed by data display means 34, 35, and 36 together with fault displays 31a, 31b, and 31c made to specify the measured distance to the measured body and fault places and fault contents if respective members of this device get out of order. The degree of danger of a collision is displayed by danger degree display means 32a, 32b, and 32c according to the degree of danger of the collision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical measuring device for measuring a distance to an object to be measured, and particularly to an optical measuring device capable of freely setting and displaying an alarm sound such as on and off. Type measuring device.

[0002]

2. Description of the Related Art Conventionally, an optical measuring device irradiates an object to be measured with laser light and measures the distance from the device to the object to be measured depending on the time until the reflected light is detected. Further, this optical measuring device has been used to measure the inter-vehicle distance between the own vehicle and another vehicle because the optical measuring device is mounted on a vehicle because it is more resistant to disturbance than an ultrasonic measuring device using ultrasonic waves. It was Further, the optical measuring device not only displays the distance to the object to be measured but also determines the object to be measured such as an obstacle by the relative speed between the vehicle and the object to be measured and the distance between the vehicle and the object to be measured. In some cases, a fixed object or a moving object such as another vehicle is discriminated, and the distance from the own vehicle to the fixed object or the moving object is displayed according to the discrimination result. That is,
This is because when the vehicle is moving at a certain speed, the difference between the distance measured last time and the distance measured this time is equal to the distance traveled by the vehicle when the object is a fixed object, and the distance is different when the object is a moving object. Therefore, in such an optical measuring device, since the object to be measured is discriminated to some extent and the distance to the object to be measured is displayed, there are few malfunctions, and the distance from the own vehicle to the object to be measured is accurately displayed. I was able to.

[0003]

However, in this optical measuring device, since the distance is simply displayed, it is not possible to effectively give an alarm at the time of a rear-end collision, or to set an alarm. The operability was poor and could not be easily set according to the passenger's request.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an optical measuring device capable of more effectively issuing an alarm by facilitating the operability of settings such as an alarm at the time of a rear-end collision and issuing an alarm according to an occupant. It is to be.

[0005]

The present invention for achieving the above object is based on the following means.

1. An optical measuring device mounted on a vehicle for measuring a distance from the vehicle to the object to be measured based on a time from irradiation of light to reception of reflected light reflected by the object to be measured. Data input means for externally inputting data to be set in the automatic measurement device, data input by the data input means, data display for displaying the measured distance to the measured object and failure of the optical measurement device Means and a risk degree display means for displaying a degree of danger of the vehicle colliding with the object to be measured.

2. The distance to the object to be measured is displayed, and when the vehicle-to-vehicle distance between the vehicle and the object to be measured is less than or equal to a set value, a blinking time interval for displaying a blinking alarm is displayed, and an alarm sound at the time of the alarm is displayed. ON or OFF is displayed, an optical axis alignment mode for setting the irradiation direction of the light is displayed, the vehicle speed of the vehicle is displayed, and the degree of risk of the vehicle colliding with the DUT is displayed. And

3. Displays the distance to the object to be measured, and when the inter-vehicle distance between the vehicle and the object to be measured becomes equal to or less than a set value, blinks to warn and inputs a blinking time interval from the outside to a desired value and displays it. , ON or OFF of the alarm sound at the time of the alarm is freely set and displayed from the outside, and an optical axis alignment mode for setting the irradiation direction of the light is externally set and displayed,
The vehicle speed of the vehicle is displayed, and the degree of danger of the vehicle colliding with the object to be measured is displayed.

[0009]

The optical measuring device of the present invention constructed as described above operates as follows.

[0010] 1. In the present apparatus, data to be set is externally input by the data input means, such as the alarm display interval time and the sound ON / OFF of the alarm sound. The input data is displayed together with the distance to the object measured by the data display means and a failure display displayed to identify the failure location and failure content when each member of the apparatus fails. Further, the display of the degree of danger of rear-end collision is displayed step by step according to the degree of risk of rear-end collision by the risk degree display means.

2. This device measures the distance from the own vehicle to the object to be measured, displays the distance to the object to be measured by the data display means, and when the distance between the own vehicle and the object to be measured becomes less than or equal to the set value. Blinks to display a blinking time interval to alert,
Danger of collision of the vehicle with the object to be measured by displaying the ON / OFF of the alarm sound at the time of alarm, displaying the optical axis alignment mode for setting the light irradiation direction, displaying the speed of the host vehicle, and displaying the speed of the host vehicle The degree of is displayed.

3. This device measures the distance from the own vehicle to the object to be measured, displays the distance to the object to be measured by the data display means, and when the distance between the own vehicle and the object to be measured becomes less than or equal to the set value. Blinks to give an alarm.The blinking time interval is externally input to the desired value by the data input means and displayed, and the on / off of the alarm sound at the time of alarm is freely set and displayed from the outside, and the light irradiation direction is set. The optical axis alignment mode is externally set and displayed, the vehicle speed is displayed, and the degree of danger of the vehicle colliding with the object to be measured is displayed by the risk display means.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The optical measuring device of the present invention will be described below with reference to the drawings.

This apparatus has a built-in irradiation plate for changing the irradiation angle of the near infrared rays for irradiating the light source and the object to be measured with, for example, a diode and a lamp that generate near infrared rays such as laser light as shown in FIG. The light irradiation unit 1, the pulse drive unit 3 for generating pulsed near infrared rays by the light irradiation unit 1, the light receiving unit 5 for detecting the reflected light from the object to be measured, and the light irradiation unit 1 described above. From the time / voltage conversion unit 7 for converting the time until the reflected light reflected by the object to be measured is irradiated with near-infrared light to be detected by the light receiving unit 5, and the time / voltage conversion unit 7 An A / D converter 9 for converting a signal into a digital value, and an arithmetic process for processing the data from the A / D converter 9 to calculate the distance and determining the kind of the object to be measured from the calculated distance. Arithmetic processing unit 11 as means and light irradiation unit The irradiation plate motor 23 for driving the irradiation plate built in the vehicle, the irradiation plate drive unit 21 including a power element and a gate circuit for driving the irradiation plate motor 23, and the speed of the vehicle are detected. There is a vehicle speed detection unit 25 for doing so, and a display unit 51 for displaying the measured distance to the measured object, the degree of danger of the measured object, and the like and issuing an alarm.

The time / voltage conversion unit 7 is a semiconductor device composed of an integrating circuit and the like. The A / D conversion unit 9 is an A / D converter or the like, and the arithmetic processing unit 1
1 is a computing element such as a microcomputer and a digital signal processor. In addition, the display unit 51
Is composed of an LED, a cathode ray tube, a display such as a liquid crystal, and a speaker.

Further, the display unit 51 is a mode key 33 and an up key 35, which are data display means for externally inputting the time interval of alarm display and setting data for turning on or off the alarm sound as shown in FIG. And down key 36
And the 7-segment LEDs 31a to 31 which are data display means for displaying the data input by the mode key 33, the up key 35 and the down key 36, the measured distance to the object to be measured, and the failure location and failure content of the apparatus.
c and a decimal point LED 31d, and a risk degree display means for displaying the degree of danger of the own vehicle colliding with the object to be measured 2
There are two red LEDs 32a, two yellow LEDs 32b and two green LEDs 32c, and a power switch 34 for turning on / off the power of the present apparatus.

The present apparatus is mounted on a vehicle such as an automobile, a truck and a train, and is irradiated by an irradiation plate driving unit 21 so that a road width of about 3.5 m can be measured near 100 m in front of the apparatus. While the irradiation plate inside the light irradiation unit 1 is moved once in six directions by the motor 23 for irradiation, pulsed near-infrared rays are irradiated from the light irradiation unit 1 to the object to be measured in accordance with the pulse signal generated by the pulse drive unit 3. Then, the reflected light from the object to be measured is received by the light receiving section 5, the time from irradiation to light reception at this time is converted into a voltage by the time / voltage conversion section 7, and this time voltage signal is A / D converted. Part 9
Is converted into a digital value by. On the other hand, the vehicle speed detected by the vehicle speed detection unit 25 is converted into a digital value by the A / D conversion unit 9. The time until the near-infrared rays are emitted from the light emitting unit 1 converted into the digital value and received by the light receiving unit 5 is calculated by the arithmetic processing unit 11 as the distance to the object to be measured from the speed of light and the speed of the own vehicle. Is calculated.

In the display section 51, the power switch 34
Turn on the power of this device to operate it, and press the Mode key 3
By pressing 3, it is possible to switch to each mode as shown in FIG. For example, in the mode 1, the blinking time of the LEDs 32a to 32c for pressing the rear impact collision by pressing the mode key 33 once is set to 0 to 2 by the up key 35 and the down key 36.
It can be variably set by the time of second. The mode 2 is set by further pressing the mode key 33 from the state of the mode 1, and the alarm sound in the rear-end collision alarm is raised by the key 3
It is turned on by pressing 5, and turned off by pressing the down key 36. The mode 3 is set by further pressing the mode key 33 from the state of the mode 2, and the blinking time of the LEDs 32a to 32c for performing the inter-vehicle warning is variably set with the up key 35 and the down key 36 in a time of 0 to 2 seconds. You can The mode 4 is set by further pressing the mode key 33 from the state of the mode 3, and the alarm sound in the inter-vehicle warning is turned on by pressing the up key 35 or turned off by pressing the down key 36. Mode 5 is set by further pressing the mode key 33 from the state of mode 4, and is a light for irradiating the measurement object with laser light and adjusting the optical axis to a position where the reflected light from the measurement object is best received. This is an axis alignment mode, and 0 to 9.9 depending on the optimum degree of adjustment of the optical axis.
The numbers up to are displayed, and the higher the number, the more optimal the adjustment will be. The mode 6 is set by further pressing the mode key 33 from the state of the mode 5, and displays the current own vehicle speed. In the figure, the own vehicle speed is 60 km / h.
Has become. This mode setting can be set again to mode 1 by pressing the mode key 33 from the state of mode 6. In addition, if this device fails,
If an error occurs in checking the ROM and RAM in the arithmetic processing unit 11 by the segment LEDs 31a to 31c, a display such as E01 can be displayed to promptly know the failure location and the failure content.

The control of this apparatus is performed by referring to FIGS.
As shown in the flow chart of, the respective distances measured from the six directions and the first measurement are L11, L21, L31, L41, L5.
1, L61, and the vehicle speed at the time of measurement is V1 (S
1). The six distances are measured again, and the respective distances measured the second time are set to L12, L22, L32, L42, L52, L62, and the vehicle speed at the time of measurement is set to V2 (S2). The vehicle speed VAG is calculated from VAG = (V1 + V2) / 2 (S3), and the second measurement value is subtracted from the first measurement value for each irradiation angle (S4). By obtaining a slight time t until the time of the second measurement (S5),
Moving distance VAGt from the second measurement to the second measurement
Is calculated (S6). If the DUT is a moving vehicle, it is assumed that the distance from the own vehicle to other vehicles does not change significantly during the first and second measurements, and the distance to the DUT for each irradiation angle is assumed. If the difference between the distance traveled by the vehicle and the distance measured is less than ± 1 m, (S
7) Determine the object to be measured as a stationary object (S
8) The difference between the distance traveled by the vehicle and the distance measured is ±
When it does not enter the range of 1 m (S7), it is determined to be another running vehicle (S9). When the same distance is measured from less than 3 directions among 6 irradiation directions (S10), it is determined that the measured object is a small obstacle that may interfere with the running of the vehicle (S11), and the irradiation directions are 6 directions. When the same distance is measured from three or more continuous directions (S10), the vehicle is installed along a road that does not obstruct the running of the vehicle or a large obstacle that may hinder the running of the vehicle. Obstacle determination subroutine processing for determining any of road-related equipment such as guardrails is performed (S12), and the distances measured for the second time are different for these other vehicles and the measurement object determined to be the aforementioned obstacles. L12 <25m, L62 <25m, L22
<40m, L52 <40m, L32 <100m, L42 <10
If it corresponds to any of 0 m (S13), a risk determination subroutine process for determining the degree of collision risk in traveling of the own vehicle and issuing an alarm is performed (S14),
The second measured distance is L12 <25m, L62
<25m, L22 <40m, L52 <40m, L32 <100
If either m or L42 <100 m is not satisfied (S13), the object to be measured is in a position that does not hinder the running of the vehicle, and therefore the risk determination subroutine process is not performed. Then, a display processing subroutine for displaying data on the 7-segment LEDs 31a to 31c and the like according to each mode and setting is executed (S15).

In the obstacle judgment subroutine processing, as shown in the flowchart of FIG. 6, the distance traveled by the vehicle during the first and second measurement times and the amount of change in the second measured distance from the first measured distance become equal. Second measurement distance L12, L2
2, ... L62 is selected (S34), and the maximum value and the minimum value of the selected second measurement distance L12, L22, ... L62 are auto-regressed to obtain the distance deviation H, that is, the unevenness of the arrangement of the measured object ( S
35) If the deviation H does not fall within the range of ± 0.5 m (S36), the measured object is driven by the vehicle such as the wall in front of the vehicle at the T-shaped road as shown in FIG. If it is determined that the obstacle is a large obstacle (S38), and the deviation H is within a range of ± 0.5 m (S36), a road that does not obstruct the running of the own vehicle such as a guardrail as shown in FIG. When determining a hazard in the risk assessment subroutine of a road ancillary facility by determining 0.2 as the inter-vehicle distance d at the time of a safe stop, which is the vehicle-to-vehicle distance when the host vehicle is braked and stopped Is reduced (S37).

Therefore, the obstacle judgment subroutine processing judges the curvature which is the bending angle of the guardrail or the like by judging the unevenness of the light reflection surface of the object to be measured, and judges the large obstacle such as the wall and the road incidental to the guardrail or the like. When it is determined to be equipment, and when it is determined to be equipment attached to the road, the inter-vehicle distance d at the time of a safe stop is corrected to prevent an erroneous determination, so erroneous measurement of the distance to the DUT and false alarms such as rear-end collisions are reduced. be able to.

Although the irradiation directions are six in this embodiment, they are not necessarily six directions and may be six or more directions.

If the object to be measured is another vehicle as shown in the flowchart of FIG. 9 (S41), the risk determination subroutine process is performed for another vehicle to determine the degree of danger to the other vehicle. Danger determination subroutine processing is performed (S42), and when the measured object is an obstacle (S4)
1) A risk determination subroutine process for anti-fixed objects for determining the degree of danger to obstacles is performed (S43).

In case of a rainy weather as shown in the flow charts of FIGS. 10 and 11 (S51), since the road surface is slippery due to water, the risk judgment subroutine for other vehicles is performed at other speeds as shown in FIG. The actual vehicle braking distance f1 (V1) from when the vehicle brakes to the stop and the own vehicle braking distance f2 (V2) from when the vehicle brakes to the stop are multiplied by 1.5 respectively When the vehicle is not in the rain (S51), the other vehicle braking distance f1 (V1) and the own vehicle braking distance f2 (V2) are not corrected and the distance Lc from the own vehicle to the other vehicle is corrected. Is measured (S53). 1 deceleration per second
When it is 0% or more (S55), it is assumed that the vehicle is already decelerating, and as shown in FIG. 13, the safe distance, which is a marginal distance to another vehicle when the vehicle is safely stopped, is d.
It can be calculated from (V2) -f1 (V1) -d (S
56), if the deceleration of the vehicle is less than 10% per second (S5
5) If you don't notice the existence of another vehicle and have not applied the brakes, let f3 (T) be the free running distance, which is the distance your vehicle travels from the human judgment until the body actually acts. D is D = f2 (V2) + f3 (T) -f1
It can be obtained from (V1) -d (S57). At this time, if the distance Lc to the other vehicle is equal to or greater than the safe inter-vehicle distance (S58), the safety warning display that the other vehicle is within the safe inter-vehicle distance and the distance Lc to the other vehicle are displayed (S5).
9). If the distance Lc to the other vehicle is less than the safe inter-vehicle distance (S58), the speed difference V3 between the own vehicle speed V2 and the other vehicle speed V1 is compared, and this speed difference V3 is as shown in FIG. When it is larger than the difference in the rapid rear-end collision speed with respect to the speed V2 (S60), a rear-end collision warning display indicating that there is another moving vehicle with a possibility of rear-end collision within the rapid rear-end collision distance and the distance Lc to the other vehicle are displayed (S61). When the speed difference V3 is smaller than the rapid rear-end collision speed difference with respect to the own vehicle speed V2 as shown in FIG. 14 (S60), the inter-vehicle warning display indicating that there is another vehicle moving within the rear-end collision distance and the distance Lc to the other vehicle are displayed. Display (S
62).

Therefore, the safe inter-vehicle distance is corrected according to the weather to display whether or not the own vehicle is currently within the range of the safe inter-vehicle distance, and the inter-vehicle distance with the other vehicle is displayed. Driving can be reduced, and the degree of danger in dangerous driving such as a rear-end collision is displayed and an alarm is issued depending on the speed difference between the own vehicle and another vehicle, so the driver can take measures according to the degree of the rear-end collision in advance. By doing so, dangerous driving such as a rear-end collision can be further reduced.

It should be noted that the free running distance varies depending on the age and the like, so it is desirable to set it optimally according to the individual difference. The braking distance, the inter-vehicle distance at the time of a safe stop, and the rapid rear impact speed difference in FIGS. 12 to 14 are not necessarily the numerical values in the figures, but are preferably set optimally according to the vehicle type of the vehicle. The deceleration rate is 10% at the end of the free running distance.
Although the above is the case, it is desirable to set the optimum value depending on individual differences and vehicle types. The vehicle speed of the other vehicle is the own vehicle speed detection unit 2
It is easy to add or subtract the difference between the distance between the first vehicle and the second vehicle from the other vehicle to the vehicle speed detected in 5 divided by the time difference between the first measurement and the second measurement. You can ask.

In the case of a rainy weather (S71) as shown in the flow charts of FIGS. 15 and 16, the obstacle judgment subroutine processing for obstacles causes the road surface to be slippery due to water, so that FIG.
In the case where the vehicle is not raining (S71), the actual traveling state is corrected by multiplying the vehicle braking distance f2 (V2) from the time when the vehicle is braked to the time when the vehicle is stopped as shown in 2 (S72). ), The vehicle braking distance f2 (V2) is not corrected, and the distance Lc from the vehicle to the obstacle is measured (S7).
3). Then, when the deceleration of the host vehicle is 10% or more per second (S75), it is assumed that the vehicle is already decelerating, and the safety distance, which is a marginal distance from the other vehicle when the vehicle stops safely as shown in FIG. Then, the safe inter-vehicle distance D can be obtained from D = f2 (V2) -d (S76), and the deceleration of the own vehicle is 10% per second.
If it is less than (S75), the driver has not yet noticed the existence of the obstacle and has not braked, so the free running distance, which is the distance that the vehicle travels from the human judgment until the body actually acts, is f3 (T). Then, the safe inter-vehicle distance D is D = f2 (V2
) + F3 (T) -d (S7)
7). At this time, if the distance Lc to the obstacle is equal to or greater than the safe inter-vehicle distance (S78), the safety warning display that the obstacle is within the safe inter-vehicle distance and the distance Lc to the obstacle are displayed (S79). When the distance Lc to the other vehicle is less than the safe inter-vehicle distance (S78), the own vehicle speed V2 is 6
When it is 0 km / h or more (S80), an indication that there is a possibility of a rear-end collision within the rapid rear-end collision distance and the distance Lc to the obstacle are displayed (S81), and the vehicle speed V2 is 60 km / h. If it is less than (S80), the display that there is an obstacle within the rear-end collision distance and the distance Lc to the obstacle are displayed (S82).

Therefore, the safe inter-vehicle distance is corrected according to the weather and whether or not the own vehicle is currently within the range of the safe inter-vehicle distance is displayed and the inter-vehicle distance with the obstacle is displayed. It is possible to reduce the dangerous driving of the vehicle and to display the degree of danger in the dangerous driving such as a rear-end collision depending on the speed of the own vehicle and issue an alarm, so that the driver can take measures according to the degree of the risk such as the rear-side collision in advance. Dangerous driving such as rear-end collision can be further reduced. Also,
When the deceleration rate was 10% or more, the end of the free running distance was set as
It is desirable to set the optimum value according to individual differences and vehicle types.

It should be noted that it is desirable to set the free-running distance to an optimum value in accordance with the individual difference because there are individual differences depending on age and the like. The braking distance and the inter-vehicle distance at the time of safe stop in FIGS. 12 and 13 are not necessarily the numerical values in the figures, but are preferably set optimally according to the vehicle type of the vehicle.

The display processing subroutine reads the data corresponding to the modes 1 to 6 of FIG. 3 inputted from the outside as shown in the flowchart of FIG. 17 (S91) and displays the distance to the object to be measured (S92). ). At this time, if the mode key 33 is pressed and the mode 1 is selected (S93), the blue LED is emitted at the initial stage of the rear-end collision warning.
32c, the yellow LED 32b at the warning stage of the rear-end collision warning, and the blinking time for blinking the red LED at the dangerous stage of the rear-end collision alarm are displayed by the 7-segment LED (S9).
4). When the mode 2 is selected (S95), the sound of the rear-end collision warning is turned on or off according to the setting (S9).
6). When mode 3 is selected (S97), the blue LED 32c is displayed in the initial stage of the vehicle alarm, the yellow LED 32b is displayed in the caution stage of the vehicle alarm, and the red LED is blinked in the dangerous stage of the vehicle alarm. Is performed (S98). When the mode 4 is selected (S99), the sound of the vehicle alarm is turned on or off according to the setting (S100). When mode 5 is selected (S101), the optimum degree of optical axis alignment is displayed in the optical axis alignment mode in which the optical axis is aligned so that the laser beam is optimally irradiated on the DUT and reflected light can be received. Yes (S102). When the mode 6 is selected (S103), the vehicle speed is displayed (S104).
If neither mode is selected, the measured distance is displayed and the process ends (S91).

As described above, the optical measuring device of the present invention is
Since the data input by the up key of the display unit can be confirmed by the 7-segment LED or the like, the data can be input accurately. Further, when each member of the apparatus fails, the failure location and the failure content are promptly displayed, which facilitates maintenance. Further, the degree of danger of rear-end collision can be displayed stepwise by the degree-of-end collision display according to the degree of danger of rear-end collision, and the time interval for arbitrary warning from outside can be changed, so that more effective warning is given. be able to.

[0032]

As described above, the optical measuring device of the present invention has the following effects.

1. In this device, the data input by the data input means can be displayed and confirmed by the data display means, so that the data can be input accurately. Also,
When each member of this device breaks down, the failure location and the details of the failure are promptly displayed, which facilitates maintenance. And
The display of the degree of danger such as a rear-end collision can be displayed step by step according to the degree of the rear-end collision by the degree-of-risk display means, and the time interval at which the occupant can be arbitrarily warned from outside can be changed. Therefore, the alarm can be issued more effectively.

2. Even if a failure occurs in this device, the data display means promptly displays the failure location and the failure content, so maintainability is good, and the danger level display means gives an alarm according to the degree of danger, which is more effective. You can give an alarm.

3. This device has good maintainability because the data display means promptly displays the failure location and the details of the failure, and the data input means allows the vehicle to collide with the DUT. Is displayed and the setting can be changed according to the occupant's preference, so that the operability of the setting is facilitated, and the danger level display means gives a warning according to the degree of danger, so that the warning can be given more effectively.

[Brief description of drawings]

FIG. 1 is a drawing for explaining a configuration of an optical measuring apparatus that is an embodiment of the present invention.

FIG. 2 is a drawing for explaining the configuration of the display unit of the optical measuring device that is an embodiment of the present invention.

FIG. 3 is a diagram for explaining a display on a display unit of the optical measuring device according to an embodiment of the present invention.

FIG. 4 is a flow chart for explaining control of the optical measuring device which is an embodiment of the present invention.

FIG. 5 is a flow chart for explaining control of the optical measuring device which is an embodiment of the present invention.

FIG. 6 is a flow chart for explaining an obstacle judgment subroutine of control of the optical measuring device which is an embodiment of the present invention.

FIG. 7 is a diagram for explaining measurement of an obstacle by the optical measuring device according to the embodiment of the present invention.

FIG. 8 is a diagram for explaining measurement of an obstacle by the optical measuring device according to the embodiment of the present invention.

FIG. 9 is a flow chart for explaining a risk judgment subroutine of control of the optical measuring device which is an embodiment of the present invention.

FIG. 10 is a flow chart for explaining a control subroutine of the optical measuring device according to the embodiment of the present invention, which is to be executed with respect to another vehicle risk determination subroutine.

FIG. 11 is a flow chart for explaining the control of the optical measuring device according to the embodiment of the present invention, which is a subroutine for determining a danger for another vehicle.

FIG. 12 is a view for explaining a braking distance with respect to the speed of the own vehicle or another vehicle in the optical measuring device according to the embodiment of the present invention.

FIG. 13 is a diagram for explaining an inter-vehicle distance at the time of a safe stop with respect to the speed of the own vehicle or another vehicle in the optical measuring device according to the embodiment of the present invention.

FIG. 14 is a diagram for explaining a rapid collision speed difference with respect to the speed of the host vehicle in the optical measuring device according to the embodiment of the present invention.

FIG. 15 is a flow chart for explaining a danger determination subroutine for a fixed object in the control of the optical measuring device according to the embodiment of the present invention.

FIG. 16 is a flow chart for explaining a danger determination subroutine for a fixed object in the control of the optical measuring device according to the embodiment of the present invention.

FIG. 17 is a flow chart for performing a display processing subroutine of control of the optical measuring device which is an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Light irradiation part, 3 ... Pulse drive part, 5 ... Light receiving part, 7 ...
Time / voltage conversion unit, 9 ... A / D conversion unit, 11 ... Arithmetic processing unit, 21 ... Irradiation plate drive unit, 23 ... Irradiation plate motor, 2
5 ... Own vehicle speed detection unit, 31a to 31c ... 7 segment L
ED, 32a ... Red LED, 32b ... Yellow LED, 32
c ... Blue LED, 33 ... Mode key, 34 ... Power switch, 35 ... Up key, 36 ... Down key, 51 ... Display section.

Claims (3)

[Claims] 1. An optical measurement mounted on a vehicle for measuring a distance from the vehicle to the object to be measured based on a time from irradiation of light to reception of reflected light reflected by the object to be measured. In the device, data input means for externally inputting data to be set in the optical measuring device, data inputted by the data inputting means, measured distance to the object to be measured, and failure of the optical measuring device. An optical measuring device, comprising: a data display unit that displays the item and a risk degree display unit that displays a degree of danger of the vehicle colliding with the object to be measured. 2. A distance to the object to be measured is displayed, and when the distance between the vehicle and the object to be measured is less than or equal to a set value, a blinking time interval for displaying a blinking alarm is displayed. The on / off of the alarm sound at the time is displayed, the optical axis alignment mode for setting the irradiation direction of the light is displayed, the vehicle speed of the vehicle is displayed, and the degree of danger of the vehicle colliding with the measured object is displayed. The optical measuring device according to claim 1, which is displayed. 3. A blinking time interval for displaying a distance to the object to be measured, and blinking to give an alarm when the inter-vehicle distance between the vehicle and the object to be measured falls below a set value by a desired value from outside. Is displayed on the screen, and the on / off of the alarm sound at the time of the alarm is freely set and displayed from the outside, and the optical axis alignment mode for setting the irradiation direction of the light is externally set and displayed, and the vehicle speed of the vehicle is displayed. Is displayed, and the degree of danger of the vehicle colliding with the object to be measured is displayed.