JPH0867222A - Optical type measurement device and installation thereof - Google Patents

Abstract

PURPOSE: To provide an optical type measurement device which can obviate the necessity of a special structure for the countermeasure for safety in collision without reducing the cloudiness removing effect in the case when a defroster is operated, and eliminate the case where the measurement is disabled because of the part where wiping is not carried out, when a wiper is operated, and prevent the viewfield of a driver from being obstructed. CONSTITUTION: An optical type measurement device 100 is built in a room mirror and varies the angle of a mirror surface 105 and confirms the desired rear position. A display part 51 displays the distance from the own vehicle to a measured substance, kind of the measured substance, and the degree of the danger of the colision with the measured substance.

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 irradiating an object to be measured with light and measuring the distance from the reflected light to the object to be measured, and more particularly to incorporating this device into a room mirror. The optical measurement device that does not require a special structure for the measurement environment and the optical measurement device that is attached to the mirror does not require a space for installing this device and does not obstruct the driver's view. The present invention relates to a method for mounting a measuring device.

[0002]

2. Description of the Related Art Conventionally, as a device for measuring an inter-vehicle distance of an object to be measured such as an own vehicle and another vehicle, there is an ultrasonic measuring device using an ultrasonic wave which is generally commercially available as a product. This ultrasonic type measuring device transmits ultrasonic waves from a transducer that generates ultrasonic waves to an object to be measured, and then receives the reflected wave of the ultrasonic waves reflected by the object to be measured again by the vibrator. The distance from the vehicle to the measured object is measured, and this distance is displayed. If the vehicle is about to collide with the measured object, an alarm is issued to alert the driver.

However, since this ultrasonic measuring device has an ultrasonic wave input / output section composed of a vibrator for transmitting and receiving ultrasonic waves, the ultrasonic wave from the vibrator is There was a need for special waterproof and dustproof structures to prevent the ingress of water and dust without hindering the water. In addition, this ultrasonic measurement device processes the above-mentioned ultrasonic input / output unit and signals from this ultrasonic input / output unit, and calculates the distance from the vehicle to another vehicle, such as an MPU (micro processor unit). Since the arithmetic processing units consisting of are installed in different places, when performing maintenance due to a failure, etc., it is necessary to remove them individually from each place and check which one is the trouble. Could not be done. further,
This ultrasonic type measuring device malfunctions due to the ultrasonic waves used for automatic doors, etc., and the frequency of the ultrasonic waves causes the animal's audible range to cause pets such as dogs and cats to become neuroses. was there.

In order to solve this problem, there is an optical measuring device using laser light. This optical measuring device is provided with a laser diode for irradiating the object to be measured with a laser beam, and irradiating the laser beam from this laser diode
The distance from the vehicle to the measured object is measured by the time until the reflected light of the laser light reflected by the measured object is received. Therefore, this device does not interfere with the ultrasonic waves used for automatic doors, etc., and displays the distance from the vehicle to the object to be measured or the vehicle to the object to be measured without making the pet neurosis. The driver can now be alerted if a collision is likely. In addition, this optical measuring device is integrated with an irradiation unit that irradiates a laser beam and an arithmetic processing unit that calculates the distance from the above-mentioned time, and can easily perform maintenance for malfunctions and the like. ,
Furthermore, since it is installed on the dashboard, no special structure for waterproofing and dustproofing is required.

[0005]

However, in such an optical measuring device, the effect of removing the fog on the windshield when the defroster is operated by the air conditioner for installation as shown in FIG. 22, for example. It required a special structure such as an air bag to reduce the number of vehicles and as a safety measure in the event of a collision. In addition, as shown in FIG. 23, when the wiper is operated in rainy weather or the like, depending on the type of the vehicle, there may be a portion where the wiper is left unwiped and measurement may not be possible, or the driver's left front view may be obstructed.

Therefore, an object of the present invention is to operate the wiper without reducing the fogging removing effect when the defroster of the air conditioner is moved, without requiring a special structure for safety measures in the event of a collision. It is an object of the present invention to provide an optical measuring device and a method for mounting the optical measuring device, which eliminates the case where the measurement cannot be performed due to an unwiped portion when the measurement is performed and does not hinder the driver's visual field.

[0007]

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

1. The present invention provides a light irradiation means for irradiating a measured object with light, a light receiving means for receiving reflected light of the light from the measured object, and irradiating the measured object with the light by the light irradiation means. Then calculate the distance from the measurement point to the object to be measured by the time until the reflected light of the light is received by the light receiving unit, and determine the type of the object to be measured based on the calculated distance, An arithmetic processing unit that determines the degree of risk of collision with the object to be measured is built in the interior mirror.

2. The present invention provides a light irradiation means for irradiating a measured object with light, a light receiving means for receiving reflected light of the light from the measured object, and irradiating the measured object with the light by the light irradiation means. Then calculate the distance from the measurement point to the object to be measured by the time until the reflected light of the light is received by the light receiving unit, and determine the type of the object to be measured based on the calculated distance, Arithmetic processing means for judging the degree of risk of collision with the object to be measured is built in a rearview mirror, the light irradiation means irradiates the object to be measured with the light, and the light receiving means measures the object to be measured. An opening provided on the rear surface of the mirror surface of the room mirror for receiving the reflected light of the light reflected by an object.

3. The present invention provides a light irradiation means for irradiating a measured object with light, a light receiving means for receiving reflected light of the light from the measured object, and irradiating the measured object with the light by the light irradiation means. Then calculate the distance from the measurement point to the object to be measured by the time until the reflected light of the light is received by the light receiving unit, and determine the type of the object to be measured based on the calculated distance, A rear surface of the mirror surface of the room mirror for irradiating the object to be measured with the light by means of the light irradiating means, and an arithmetic processing means for judging the degree of risk of collision with the object to be measured. A first opening provided on the rear surface, and a second opening provided on the rear surface of the mirror surface of the room mirror for receiving the reflected light of the light reflected by the object to be measured by the light receiving means,
It is characterized by having.

4. The present invention provides a light irradiation means for irradiating a measured object with light, a light receiving means for receiving reflected light of the light from the measured object, and irradiating the measured object with the light by the light irradiation means. Then calculate the distance from the measurement point to the object to be measured by the time until the reflected light of the light is received by the light receiving means, and determine the type of the object to be measured based on the value of the distance, An arithmetic processing unit that determines the degree of risk of collision with the object to be measured is incorporated in a room mirror, and a light irradiation changing unit that changes an irradiation angle of light from the light irradiation unit, and the light irradiation unit. A first opening provided on the rear surface of the mirror surface of the room mirror for irradiating the object to be measured with the light, and the reflected light of the light reflected by the object to be measured by the light receiving means. On the back of the mirror surface of the room mirror for A second opening kicked, and having a.

5. The present invention provides a light irradiation means for irradiating a measured object with light, a light receiving means for receiving reflected light of the light from the measured object, and irradiating the measured object with the light by the light irradiation means. Then calculate the distance from the measurement point to the object to be measured by the time until the reflected light of the light is received by the light receiving means, and determine the type of the object to be measured based on the value of the distance, An arithmetic processing unit that determines the degree of risk of collision with the measured object, and a distance from the measurement point processed by the arithmetic processing unit to the measured object, and the measured object. Display means for displaying one or more of the following, depending on the type and the degree of collision risk of the measured object, and the room mirror for irradiating the measured object with the light by the light irradiation means. No. 1 on the back of the mirror surface of A second opening provided on the rear surface of the mirror surface of the room mirror for receiving the reflected light of the light reflected by the object to be measured by the light receiving means. To do.

6. The present invention provides a light irradiation means for irradiating a measured object with light, a light receiving means for receiving reflected light of the light from the measured object, and irradiating the measured object with the light by the light irradiation means. Then calculate the distance from the measurement point to the object to be measured by the time until the reflected light of the light is received by the light receiving means, and determine the type of the object to be measured based on the value of the distance, Arithmetic processing means for judging the degree of risk of collision with the object to be measured is built in the interior mirror, and light irradiation changing means for changing the irradiation angle of the light from the light irradiation means, and the arithmetic processing means Display means for displaying any one or more of a distance from the measurement point to be processed to the object to be measured, a type of the object to be measured, and a degree of risk of collision of the object to be measured; The light is irradiated onto the DUT by the light irradiation means. A first opening provided on the rear surface of the mirror surface of the room mirror for irradiating, and a mirror surface of the room mirror for receiving the reflected light of the light reflected by the DUT by the light receiving means. And a second opening provided on the back surface.

7. The present invention provides a light irradiation means for irradiating a measured object with light, a light receiving means for receiving reflected light of the light from the measured object, and irradiating the measured object with the light by the light irradiation means. Then calculate the distance from the measurement point to the object to be measured by the time until the reflected light of the light is received by the light receiving means, and determine the type of the object to be measured based on the value of the distance, An arithmetic processing unit that determines the degree of risk of collision with the measured object, and a distance from the measurement point processed by the arithmetic processing unit to the measured object, and the measured object. Display means for displaying one or more of the following, depending on the type and the degree of collision risk of the measured object, and the room mirror for irradiating the measured object with the light by the light irradiation means. No. 1 on the back of the mirror surface of A mouth portion, a second opening portion provided on the rear surface of the mirror surface of the room mirror for receiving the reflected light of the light reflected by the object to be measured by the light receiving means, and the mirror surface of the room mirror. Mirror surface changing means for changing the angle to a desired angle.

8. The present invention provides a light irradiation means for irradiating a measured object with light, a light receiving means for receiving reflected light of the light from the measured object, and irradiating the measured object with the light by the light irradiation means. Then calculate the distance from the measurement point to the object to be measured by the time until the reflected light of the light is received by the light receiving means, and determine the type of the object to be measured based on the value of the distance, Arithmetic processing means for judging the degree of risk of collision with the object to be measured is built in the interior mirror, and light irradiation changing means for changing the irradiation angle of the light from the light irradiation means, and the arithmetic processing means Display means for displaying any one or more of a distance from the measurement point to be processed to the object to be measured, a type of the object to be measured, and a degree of risk of collision of the object to be measured; The light is irradiated onto the DUT by the light irradiation means. A first opening provided on the rear surface of the mirror surface of the room mirror for irradiating, and a mirror surface of the room mirror for receiving the reflected light of the light reflected by the DUT by the light receiving means. It is characterized by having a second opening provided on the back surface and a mirror surface changing means for changing the mirror surface of the room mirror to a desired angle.

9. Light irradiating means for irradiating the object to be measured with light, light receiving means for receiving reflected light of the light from the object to be measured, and irradiating the light to the object to be measured with the light irradiating means The distance from the measurement point to the object to be measured is calculated by the time until the reflected light of the light is received by the light receiving means, the type of the object to be measured is determined based on the calculated distance, and the object to be measured is An optical measuring device comprising: arithmetic processing means for determining the degree of danger of collision with the rear mirror is attached.

[0017]

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

1. This device is built in the interior mirror, and irradiates the DUT with light by the light irradiation means, receives the reflected light of the light from the measured object by the light receiving means, and irradiates the light by the arithmetic processing means. The distance from the measurement point to the object to be measured is calculated from the time from the reception of light to the time of receiving light and the speed of light. Therefore, this device can measure the distance from the measurement point to the object to be measured, and can also confirm the field of view behind the vehicle as a rearview mirror. Then, the determination of the object to be measured is made by calculating the difference between the distance of the object to be measured previously measured by the arithmetic processing means and the distance of the object to be measured currently measured in a short time from the time of the previous measurement of the vehicle to the time of the current measurement. Compare with the distance moved. The difference in this compared distance is
If the object to be measured is a fixed object, it will be equal if measurement error is not taken into consideration, and if the object to be measured is another vehicle, the difference between the previous and the present measurement time is a slight time even if the maximum speed of the car is considered. It should not change very rapidly. Therefore, it is possible to determine that those having the same difference in the above-mentioned compared distances are fixed objects, and those that are not equal are other vehicles. Furthermore, the degree of danger can be determined by comparing the distance from the vehicle to the object to be measured and the distance at which the vehicle can be safely stopped by the arithmetic processing means.

2. This device is built in the interior mirror, and irradiates the object to be measured with light from the opening provided on the rear surface of the mirror surface of the interior mirror, and the object to be measured from the above-mentioned opening with the light receiving means. The reflected light of the light is received, and the arithmetic processing unit measures the distance from the measurement point to the object to be measured from the time from the light irradiation to the light reception and the speed of the light. Therefore, this device can measure the distance from the measurement point to the object to be measured, and can also confirm the field of view behind the vehicle as a rearview mirror. Then, the determination of the object to be measured is made by calculating the difference between the distance of the object to be measured previously measured by the arithmetic processing means and the distance of the object to be measured currently measured in a short time from the time of the previous measurement of the vehicle to the time of the current measurement. Compare with the distance moved. This difference in distance is equal when the object to be measured is a fixed object without considering the measurement error, and when the object to be measured is another vehicle, even if the maximum speed of the car etc. is taken into consideration The time difference should not change very rapidly due to the small amount of time. Therefore, it is possible to determine that those having the same difference in the above-mentioned compared distances are fixed objects, and those that are not equal are other vehicles. Furthermore, the degree of danger can be determined by comparing the distance from the vehicle to the object to be measured and the distance at which the vehicle can be safely stopped by the arithmetic processing means.
Further, the present apparatus limits the light receiving range of the above-mentioned reflected light from the DUT which is received by the light receiving means by the opening portion provided on the rear surface of the mirror surface of the room mirror, and other than the reflected light from the DUT. The reception of disturbance light is reduced.

3. This device is built in a room mirror, and irradiates light to an object to be measured by a light irradiating means from a first opening provided on the back surface of the mirror surface of the room mirror, and light from the object to be measured is irradiated by the light receiving means. The reflected light is transmitted through the second opening provided on the rear surface of the mirror surface of the room mirror to be received, and the calculation processing means determines the time from the light irradiation to the light reception and the speed of the light from the measurement point. Measure the distance to the object to be measured. Therefore, this device can measure the distance from the measurement point to the object to be measured, and can also confirm the field of view behind the vehicle as a rearview mirror. Then, the determination of the object to be measured is made by calculating the difference between the distance of the object to be measured previously measured by the arithmetic processing means and the distance of the object to be measured currently measured in a short time from the time of the previous measurement of the vehicle to the time of the current measurement. Compare with the distance moved. This difference in distance is equal when the object to be measured is a fixed object without considering the measurement error, and when the object to be measured is another vehicle, even if the maximum speed of the car etc. is taken into consideration The time difference should not change very rapidly due to the small amount of time. Therefore, it is possible to determine that those having the same difference in the above-mentioned compared distances are fixed objects, and those that are not equal are other vehicles. Furthermore, the degree of danger can be determined by comparing the distance from the vehicle to the object to be measured and the distance at which the vehicle can be safely stopped by the arithmetic processing means. Further, in the present device, by providing the first opening and the second opening to perform the light irradiation and the light reception in separate openings, the size of the opening of the light receiving section can be adjusted. Since it can be formed independently of irradiation, the light receiving range of the above-mentioned reflected light from the DUT received by the light receiving means is limited to a more optimal light receiving range, and the disturbance light other than the reflected light from the DUT is Light reception is reduced.

4. This device is built in a room mirror, and while changing the irradiation angle of the light irradiated by the light irradiation means from the first opening provided on the rear surface of the mirror surface of the room mirror in six directions by the light irradiation changing means. The object to be measured is irradiated with light at each irradiation angle, and the reflected light of the light from the object to be measured is received by the light receiving means by passing through the second opening provided on the back surface of the mirror surface of the room mirror, and the calculation processing is performed. The means measures the distance from the measurement point for each irradiation angle to the object to be measured based on the time from the light irradiation to the light reception and the speed of the light. Therefore, this device can measure the distance from the measurement point to the object to be measured, and can also confirm the field of view behind the vehicle as a rearview mirror. Then, the object to be measured is determined by calculating the difference between the distance of the object of measurement for each irradiation angle measured last time by the arithmetic processing means and the distance of the object of measurement for each irradiation angle measured this time from the time of the previous measurement of the own vehicle. Compare with the distance moved in a short time until measurement. This difference in distance is equal when the object to be measured is a fixed object without considering the measurement error, and when the object to be measured is another vehicle, even if the maximum speed of the car etc. is taken into consideration The time difference should not change very rapidly due to the small amount of time. Therefore, it is possible to determine that those having the same difference in the above-mentioned compared distances are fixed objects, and those that are not equal are other vehicles. For an object to be measured that is not determined to be another vehicle, if the distance to the object to be measured for each irradiation angle measured this time is within a certain range in three or more consecutive directions, it is on the road. It can be determined that the obstacle has a certain width. Furthermore, the degree of danger can be determined by comparing the distance from the vehicle to the object to be measured and the distance at which the vehicle can be safely stopped by the arithmetic processing means. The device also includes a first opening and a second opening.
By irradiating light and receiving light by separate openings by providing the opening, the size of the opening of the light receiving portion can be formed independently of the irradiation of the light emitting means. The light receiving range of the above-described reflected light from the DUT that is received is limited to a more optimal light receiving range, and the reception of disturbance light other than the reflected light from the DUT is reduced.

5. This device is built in a room mirror, and irradiates light to an object to be measured by a light irradiating means from a first opening provided on the back surface of the mirror surface of the room mirror, and light from the object to be measured is irradiated by the light receiving means. The reflected light is transmitted through the second opening provided on the rear surface of the mirror surface of the room mirror to be received, and the calculation processing means determines the time from the light irradiation to the light reception and the speed of the light from the measurement point. Measure the distance to the object to be measured. Therefore, this device can measure the distance from the measurement point to the object to be measured, and can also confirm the field of view behind the vehicle as a rearview mirror. Then, the determination of the object to be measured is made by calculating the difference between the distance of the object to be measured previously measured by the arithmetic processing means and the distance of the object to be measured currently measured in a short time from the time of the previous measurement of the vehicle to the time of the current measurement. Compare with the distance moved. This difference in distance is equal when the object to be measured is a fixed object without considering the measurement error, and when the object to be measured is another vehicle, even if the maximum speed of the car etc. is taken into consideration The time difference should not change very rapidly due to the small amount of time. Therefore, it is possible to determine that a vehicle having the same difference in the above-mentioned compared distances is a fixed object and a vehicle having an unequal distance difference is another vehicle. Furthermore, the degree of danger can be determined by comparing the distance from the vehicle to the object to be measured and the distance at which the vehicle can be safely stopped by the arithmetic processing means. The display means displays to the driver at least one of the distance from the measurement point processed by the arithmetic processing means to the object to be measured, the type of the object to be measured, and the degree of risk of collision, If there is a danger such as a collision while driving, give a warning. The device also includes a first opening and a second opening.
By irradiating light and receiving light by separate openings by providing the opening, the size of the opening of the light receiving portion can be formed independently of the irradiation of the light emitting means. The light receiving range of the above-described reflected light from the DUT that is received is limited to a more optimal light receiving range, and the reception of disturbance light other than the reflected light from the DUT is reduced.

6. This device is built in a room mirror, and while changing the irradiation angle of the light irradiated by the light irradiation means from the first opening provided on the rear surface of the mirror surface of the room mirror in six directions by the light irradiation changing means. The object to be measured is irradiated with light at each irradiation angle, and the reflected light of the light from the object to be measured is received by the light receiving means by passing through the second opening provided on the back surface of the mirror surface of the room mirror, and the calculation processing is performed. The means measures the distance from the measurement point for each irradiation angle to the object to be measured based on the time from the light irradiation to the light reception and the speed of the light. Therefore, this device can measure the distance from the measurement point to the object to be measured, and can also confirm the field of view behind the vehicle as a rearview mirror. Then, the object to be measured is determined by calculating the difference between the distance of the object of measurement for each irradiation angle measured last time by the arithmetic processing means and the distance of the object of measurement for each irradiation angle measured this time from the time of the previous measurement of the own vehicle. Compare with the distance moved in a short time until measurement. This difference in distance is equal when the object to be measured is a fixed object without considering the measurement error, and when the object to be measured is another vehicle, even if the maximum speed of the car etc. is taken into consideration The time difference should not change very rapidly due to the small amount of time. Therefore, it is possible to determine that a vehicle having the same difference in the above-mentioned compared distances is a fixed object and a vehicle having an unequal distance difference is another vehicle. For an object to be measured that is not determined to be another vehicle, if the distance to the object to be measured for each irradiation angle measured this time is within a certain range in three or more consecutive directions, it is on the road. It can be determined that the obstacle has a certain width. Furthermore, the degree of danger can be determined by comparing the distance from the vehicle to the object to be measured and the distance at which the vehicle can be safely stopped by the arithmetic processing means. The display means displays to the driver at least one of the distance from the measurement point processed by the arithmetic processing means to the object to be measured, the type of the object to be measured, and the degree of risk of collision, If there is a danger such as a collision while driving, give a warning. Further, in the present device, by providing the first opening and the second opening to perform the light irradiation and the light reception in separate openings, the size of the opening of the light receiving section can be adjusted. Since it can be formed independently of irradiation, the light receiving range of the above-mentioned reflected light from the DUT received by the light receiving means is limited to a more optimal light receiving range, and the disturbance light other than the reflected light from the DUT is Light reception is reduced.

7. This device is built in a room mirror, and irradiates light to an object to be measured by a light irradiating means from a first opening provided on the back surface of the mirror surface of the room mirror, and light from the object to be measured is irradiated by the light receiving means. The reflected light is transmitted through the second opening provided on the rear surface of the mirror surface of the room mirror to be received, and the calculation processing means determines the time from the light irradiation to the light reception and the speed of the light from the measurement point. Measure the distance to the object to be measured. Therefore, this device can measure the distance from the measurement point to the object to be measured, and can also confirm the field of view behind the vehicle as a rearview mirror. With respect to the mirror surface of the room mirror, the installation angle of the mirror surface can be freely changed so that a desired rear view can be confirmed by the mirror surface changing means. Then, the determination of the object to be measured is made by calculating the difference between the distance of the object to be measured previously measured by the arithmetic processing means and the distance of the object to be measured currently measured in a short time from the time of the previous measurement of the vehicle to the time of the current measurement. Compare with the distance moved. This difference in distance is equal when the object to be measured is a fixed object without considering the measurement error, and when the object to be measured is another vehicle, even if the maximum speed of the car etc. is taken into consideration The time difference should not change very rapidly due to the small amount of time. Therefore, it is possible to determine that a vehicle having the same difference in the above-mentioned compared distances is a fixed object and a vehicle having an unequal distance difference is another vehicle. Furthermore, the degree of danger can be determined by comparing the distance from the vehicle to the object to be measured and the distance at which the vehicle can be safely stopped by the arithmetic processing means. The display means displays to the driver at least one of the distance from the measurement point processed by the arithmetic processing means to the object to be measured, the type of the object to be measured, and the degree of risk of collision, If there is a danger such as a collision while driving, give a warning. Further, in the present device, by providing the first opening and the second opening to perform the light irradiation and the light reception in separate openings, the size of the opening of the light receiving section can be adjusted. Since it can be formed independently of irradiation, the light receiving range of the above-mentioned reflected light from the DUT received by the light receiving means is limited to a more optimal light receiving range, and the disturbance light other than the reflected light from the DUT is Light reception is reduced.

8. This device is built in a room mirror, and while changing the irradiation angle of the light irradiated by the light irradiation means from the first opening provided on the rear surface of the mirror surface of the room mirror in six directions by the light irradiation changing means. The object to be measured is irradiated with light at each irradiation angle, and the reflected light of the light from the object to be measured is received by the light receiving means by passing through the second opening provided on the back surface of the mirror surface of the room mirror, and the calculation processing is performed. The means measures the distance from the measurement point for each irradiation angle to the object to be measured based on the time from the light irradiation to the light reception and the speed of the light. Therefore, this device can measure the distance from the measurement point to the object to be measured, and can also confirm the field of view behind the vehicle as a rearview mirror. With respect to the mirror surface of the room mirror, the installation angle of the mirror surface can be freely changed so that a desired rear view can be confirmed by the mirror surface changing means. Then, the object to be measured is determined by calculating the difference between the distance of the object of measurement for each irradiation angle measured last time by the arithmetic processing means and the distance of the object of measurement for each irradiation angle measured this time from the time of the previous measurement of the own vehicle. Compare with the distance moved in a short time until measurement. This difference in distance is equal when the object to be measured is a fixed object without considering the measurement error, and when the object to be measured is another vehicle, even if the maximum speed of the car etc. is taken into consideration The time difference should not change very rapidly due to the small amount of time. Therefore, it is possible to determine that a vehicle having the same difference in the above-mentioned compared distances is a fixed object and a vehicle having an unequal distance difference is another vehicle. For an object to be measured that is not determined to be another vehicle, if the distance to the object to be measured for each irradiation angle measured this time is within a certain range in three or more consecutive directions, it is on the road. It can be determined that the obstacle has a certain width. Furthermore, the degree of danger can be determined by comparing the distance from the vehicle to the object to be measured and the distance at which the vehicle can be safely stopped by the arithmetic processing means. The display means displays to the driver at least one of the distance from the measurement point processed by the arithmetic processing means to the object to be measured, the type of the object to be measured, and the degree of risk of collision, If there is a danger such as a collision while driving, give a warning. In addition, this device
By providing the first opening and the second opening to perform light irradiation and light reception in different openings, the size of the opening of the light receiving portion is formed independently of the irradiation of the light irradiation means. Therefore, the light receiving range of the above-described reflected light from the DUT that is received by the light receiving means is limited to a more optimal light receiving range, and the reception of disturbance light other than the reflected light from the DUT is reduced. .

9. This method irradiates the object to be measured with light by the light irradiating means, receives the reflected light of the light from the object to be measured with the light receiving means, and the time from the light irradiation to the light receiving by the arithmetic processing means. Since the optical measuring device that calculates the distance from the measuring point to the object to be measured is attached to the already installed room mirror, the visibility of the rear of the vehicle can be confirmed without impairing the function as the room mirror. It is possible to measure the distance to the object to be measured and the like.

[0027]

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

The optical measuring apparatus 1 of the present invention is internally provided with a light source such as a diode and a lamp for generating near infrared rays such as laser light as shown in FIG. A light irradiation unit 2 as a means, a pulse drive unit 3 for generating pulsed near infrared rays by the light irradiation unit 2, and a light irradiation variable for changing the irradiation angle of the near infrared rays irradiated by the light irradiation unit 2. An irradiation plate which is a means, a light receiving portion 5 which is a light receiving means which detects reflected light of near infrared rays from the object to be measured, and a reflection which the near infrared rays are emitted from the light irradiation portion 2 and reflected by the object to be measured. A time / voltage conversion unit 7 for converting the time until the light is detected by the light receiving unit 5 into a voltage,
An A / D conversion unit 9 for converting the signal from the time / voltage conversion unit 7 into a digital value, a data from the A / D conversion unit 9 is processed to calculate a distance, and the measured object is calculated from the calculated distance. Processing unit 11 which is a processing unit for determining the type of the light and the risk of collision, an irradiation plate motor 23 for driving the irradiation plate built in the light irradiation unit 2, and the irradiation plate. Plate drive unit 2 including a power element and a gate circuit for driving the application motor 23
1 and a vehicle speed detection unit 25 for detecting the speed of the vehicle.
There is a display unit 51 for displaying the measured distance to the object to be measured and the degree of danger and issuing an alarm.

When the present apparatus 100 in which the optical measuring apparatus 1 is built in a rearview mirror is viewed from above, the light irradiation section 2 irradiates the object to be measured with near infrared rays as shown in the top view of FIG. The first opening 102 provided on the rear surface of the mirror surface 105 of the present device 100, and the present device 1 for receiving the reflected light of the near infrared rays reflected by the DUT by the light receiving unit 5.
Second opening 101 provided on the back surface of the mirror surface 105 of 00
There is a stay 107 attached to the ceiling in the vehicle compartment. Further, when the mirror surface 105 of the apparatus 100 is viewed from the front, the display unit 51 is provided on the upper surface of the mirror surface 105 as shown in the front view of FIG. The display unit 51 has four LEDs 11 arranged in parallel to warn the driver of the passengers and passengers in a stepwise manner about the degree of danger.
1a to 111d, a liquid crystal display 113 that displays the measured distance in an analog or digital manner, and a speaker 115 that warns the danger of a collision with the object to be measured by voice or the like through the hearing of the driver and passengers. When the apparatus is cut from AA ″ of FIG. 3 and looked into from above, an irradiation plate 117 for changing the irradiation angle of near-infrared rays from the light irradiation unit 2 as shown in the cross-sectional top view of FIG. 4, The screw 1 prevents dust inside the vehicle from entering the device.
Protective cover 116 screwed by 19a and 119b
And a mirror surface supporting member 120 connected to the mirror surface 105, and a mirror surface moving unit 118 that is a mirror surface changing unit that is connected to the mirror surface supporting member 120 and that changes the installation angle of the mirror surface 105 so that the rear field of view can always be confirmed. . FIG. 5 is a front view when the protective cover 116 is removed, and the irradiation unit 2 and the irradiation plate 117 are installed at the same height so that the near infrared rays from the irradiation unit 2 are accurately irradiated to the irradiation plate 117. There is. When the apparatus is cut from CC ″ in FIG. 5 and looked into from the upper side, the stay 107 is connected to the stay 107 by axially passing through the apparatus 100 as a countermeasure against vibration as shown in the side sectional view of FIG. I'm losing the play of the club.

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 a display such as an LED, a cathode ray tube, and a liquid crystal, and a sound output device such as a speaker or a buzzer.

The optical measuring device 100 operates as follows.

The optical measuring device 1 built in the device 100 is mounted on a vehicle such as an automobile, a truck and a train. For example, about 100 m in front of the device is about 3.5 m.
In accordance with a pulse signal generated by the pulse driving unit 3 while being moved in six directions by the irradiation plate motor 23 driven by the irradiation plate driving unit 21 so that the path width of the light irradiation unit 1 can be measured, The object to be measured is irradiated with near infrared rays, and the light receiving section 5 receives the reflected light from the object to be measured. At this time, the time from irradiation to reception is converted into a voltage by the time / voltage conversion section 7, and this Time voltage signal is A /
The D converter 9 converts the digital value. 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.

As described above, in the processing of the present apparatus 100, the arithmetic processing unit 11 measures the respective distances measured in six directions as shown in the flowcharts of FIGS. 7 and 8 and the first measured distances are L11, L21, L31, L41, L51 and L61 are set, and the vehicle speed at the time of measurement is set to V1 (S1). Measure the 6 directions again and measure the respective distances measured for the second time by L12, L22, L32,
Let L42, L52, L62 be the vehicle speed at the time of measurement and be 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 the short time t until the second measurement (S5), the moving distance VAGt from the first measurement time of the own vehicle to the second measurement time 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. Of
When the difference between the movement distance of the own vehicle and the change of the distance to the object to be measured is within ± 1 m (S7), the object to be measured is determined as a stationary object (S8), and the distance to the object to be moved and the object to be measured are determined. If the difference in change in distance of the measured object does not fall within ± 1 m (S
7) It is determined that the vehicle is running and another 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. If the same distance is measured from three or more consecutive directions (S
10), an obstacle judgment subroutine for judging either a large obstacle that the vehicle is obstructing while traveling on the road or a road auxiliary equipment such as a guardrail installed along the road that does not obstruct the traveling of the vehicle Processing is performed (S12), and the distances measured for the second time are L12 <25 for these other vehicles and the object to be measured that is determined to be the aforementioned obstacle.
m, L62 <25m, L22 <40m, L52 <40m, L32
If either <100 m or L42 <100 m is satisfied (S13), a risk determination subroutine process for determining the degree of danger of collision in traveling of the vehicle and issuing an alarm is performed (S14), second time. The respective measured distances are L12 <25m, L62 <25m, L22 <40m, L52
If either <40 m, L32 <100 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 own vehicle, and therefore the risk determination subroutine process is not performed.

In the obstacle judgment subroutine processing, as shown in the flowchart of FIG. 9, 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, in the obstacle judgment subroutine processing, the curvature which is the bending angle of the guardrail or the like is judged by judging the unevenness of the light reflecting surface of the object to be measured, and the large obstacle such as the wall and the road auxiliary such as 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.

When the object to be measured is another vehicle as shown in the flowchart of FIG. 12 (S41), the danger determining 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 if the measured object is an obstacle (S42).
41), the risk determination subroutine process for anti-fixed object for determining the degree of danger to the obstacle is performed (S4).
3).

In the case of the risk determination subroutine for other vehicles, in the case of rain (S51) as shown in the flow charts of FIGS. 13 and 14, the road surface is slippery due to water, so that the other vehicle at each speed 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. 16, when the safety distance, which is a marginal distance with another vehicle when the vehicle is safely stopped, is d, the safe inter-vehicle distance D is D = f2.
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. 17 (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 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 other vehicle 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 and give an alarm depending on the speed difference between the own vehicle and other vehicles. By taking measures, it is possible to further reduce dangerous driving such as a rear-end collision.

Since the free-running distance varies depending on the age and the like, it is desirable to set the free-running distance 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. 15 to 17 are not necessarily the numerical values in the drawings, 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. As for the display, the red LED etc. is slowly turned on in the normal safe state, the red LED etc. is flashed early at the time of the inter-vehicle warning, and the red LED etc. is flashed more quickly and sounded at the time of the rear-end collision warning. Is also good. It is more preferable that the parameters such as the vehicle speed at which the inter-vehicle warning and the rear-end collision warning are issued can be set separately according to individual differences.

In the case of obstacle judgment subroutine for obstacles in the case of rain (S71) as shown in the flow charts of FIGS. 18 and 19, the road surface is slippery due to water, so that FIG.
In the case where the vehicle is not rainy (S71), the actual driving condition is corrected by multiplying the own vehicle braking distance f2 (V2) from the time when the own vehicle brakes until the vehicle stops as shown in 5 (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 own vehicle is 10% or more per second (S75), it is assumed that the vehicle is already decelerating, and the safety distance, which is a margin distance to the other vehicle when the vehicle is safely stopped 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. 15 and 16 are not necessarily the numerical values in the figures, but are preferably set optimally according to the vehicle type of the vehicle. As for the display, the red LED etc. is slowly turned on in the normal safe state, the red LED etc. is flashed early at the time of the inter-vehicle warning, and the red LED etc. is flashed more quickly and sounded at the time of the rear-end collision warning. Is also good. Then, parameters such as the vehicle speed that issues the inter-vehicle warning and the rear-end collision warning are
It is even better if it can be set separately according to individual differences.

Since the present apparatus 100 in which the optical measuring apparatus 1 which operates as described above is built in the interior mirror is attached as shown in FIGS. 20 and 21, the defroster surface 20 is attached.
Windshield surface 2 as it does not block hot air from 7.
It does not increase the ventilation resistance of the warm air passing through 09, and even in rainy weather, the unwiping part 30 with the wiper
It is arranged so that the reflected light of the near-infrared ray irradiated to 1 or the received near-infrared ray does not pass through. Also, the optical measuring device 1 may be hooked from the upper side so as to be installed on the windshield side without hindering the field of view seen from the rearview mirror, sandwiched, or fixed by screws and bands, similar to the above. The effect is obtained. Therefore, the device 100 allows the warm air from the defroster 207 to flow through the windshield surface 20 without increasing the ventilation resistance.
In order to pass the light through the window 9, the windshield surface 209 is installed in the vehicle interior as a rearview mirror without causing partial fogging due to a partial increase in ventilation resistance. Can measure the distance to the object to be measured and the degree of danger.
Then, in the present apparatus 100, by moving the cover 120 fixed to the shaft of the mirror surface moving unit 118, only the mirror surface 105 can be moved and the desired rear position can be confirmed.
Since the measurement directions of the light irradiation unit 2 and the light reception unit 5 are not changed even if the adjustment for rearward confirmation of 5 is performed, the distance between the vehicle and the object to be measured can be accurately measured without erroneous measurement. be able to.

The display unit 51 of FIG. 3 represents the distance between the vehicle and the object to be measured, the type of the object to be measured, the degree of danger of a rear-end collision with another vehicle, etc., as described above. In this case, for example, the LEDs 111a to 111d are respectively set to 25 m, 50 m, 75 m and 100 m to the object to be measured.
When the distance to the object to be measured is 50 m according to m,
When the LEDs 111a and 111b are slowly turned on in red and the vehicle is in a distance to collide with the object to be measured,
LEDs 111a to 111d according to the distance to the object to be measured
Either of them flashes red quickly. On the other hand, the display 113 displays the distance to the object to be measured, and the speaker 115 outputs the distance to the object to be measured, the type of the object to be measured, or the degree of danger of colliding with the object to be measured, by voice. Therefore, the device 100 can confirm the degree of danger visually and the distance from the vehicle to the object to be measured, and further can obtain the information such as the distance from the vehicle to the object to be measured by hearing. When driving a car or the like, a danger such as a rear-end collision can be avoided.

The mirror surface movable section 118 of the apparatus 100
Installs a motor, etc., and drives the motor to produce a mirror surface 105.
It is even more preferable that the angle of the mirror surface 105 can be adjusted by moving the device 100 without moving the device 100 at all.

[0047]

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

1. This device can know the arrangement of the measured object around the road by measuring the unevenness of the measured distance from the own vehicle to the measured object. Accidents such as a rear-end collision can be avoided in advance while reducing erroneous measurement at the time of measuring the distance from the vehicle to the object to be measured and displaying the degree of danger according to the environment. And since this device is built in the rearview mirror, it is possible to check the rear field of view, etc., and to reduce the fog removal effect when the defroster of the air conditioner is moved, the There is no need for a special structure such as an airbag for safety measures required only for the device, and there is no case where the distance such as the wiper cannot be measured due to the unwiped portion of the wiper, and the driver's view is not obstructed. .

2. This device can know the arrangement of the measured object around the road by measuring the unevenness of the measured distance from the own vehicle to the measured object. Accidents such as a rear-end collision can be avoided in advance while reducing erroneous measurement at the time of measuring the distance from the vehicle to the object to be measured and displaying the degree of danger according to the environment. Then, the present apparatus limits the light receiving range of the reflected light from the above-mentioned measured object received by the above-mentioned light receiving means by the opening provided on the rear surface of the mirror surface of the room mirror, and other than the reflected light from the measured object. Receiving the disturbance light is reduced to reduce false measurement due to the disturbance light. further,
Since this device is built into the rearview mirror, it is possible to check the rear field of view, etc., and to reduce the effect of removing the fog when the defroster of the air conditioner is moved, this device can be used only in the event of a collision. This eliminates the need for a special structure such as an air bag for the safety measures required for the purpose, and the measurement of the distance and the like may not be possible due to the unwiped portion of the wiper, thus not hindering the driver's view.

3. This device can know the arrangement of the measured object around the road by measuring the unevenness of the measured distance from the own vehicle to the measured object. Accidents such as a rear-end collision can be avoided in advance while reducing erroneous measurement at the time of measuring the distance from the vehicle to the object to be measured and displaying the degree of danger according to the environment. In addition, in the present device, by providing the first opening and the second opening to perform light irradiation and light reception in separate openings, the size of the opening of the light receiving unit can be set to that of the light irradiation unit. Since it can be formed independently of irradiation, the light receiving range of the above-mentioned reflected light from the DUT received by the light receiving means is limited to a more optimal light receiving range, and the disturbance light other than the reflected light from the DUT is Light reception is reduced to reduce erroneous measurement due to disturbance light. Furthermore, since this device is built into the rear-view mirror, it is possible to check the rear field of view, etc., and to reduce the fog removal effect when the defroster of the air conditioner is moved, it is possible to use this device during a collision. There is no need for a special structure such as an airbag for safety measures required only for the device, and there is no case where the distance such as the wiper cannot be measured due to the unwiped portion of the wiper, and the driver's view is not obstructed. .

4. This device can know the location of the measured object around the road by measuring the unevenness of the distance from the vehicle to the measured object for each measured irradiation angle. It is determined as another vehicle or a fixed object, and if it is a fixed object, it is displayed by distinguishing it from obstacles that interfere with road incidental equipment such as guardrails and the draft of the vehicle, and the distance from the vehicle to the measured object. In addition to reducing erroneous measurements during measurement, the degree of danger according to the environment is displayed, so accidents such as rear-end collisions can be avoided. And
In the present device, by providing the first opening and the second opening, the irradiation of light and the reception of light are performed by different openings, so that the size of the opening of the light receiving section can be changed by the irradiation of the light irradiation means. Since it can be formed independently, the light receiving range of the above-mentioned reflected light from the DUT that is received by the light receiving means is limited to a more optimal light receiving range, and the reception of disturbance light other than the reflected light from the DUT is received. This reduces the number of false measurements due to disturbance light. Furthermore, since this device is built into the rear-view mirror, it is possible to check the rear field of view, etc., and to reduce the fog removal effect when the defroster of the air conditioner is moved, it is possible to use this device during a collision. There is no need for a special structure such as an airbag for safety measures required only for the device, and there is no case where the distance such as the wiper cannot be measured due to the unwiped portion of the wiper, and the driver's view is not obstructed. .

5. This device can know the location of the measured object around the road by measuring the unevenness of the measured distance from the own vehicle to the measured object. It can be displayed visually or audibly such as to reduce the erroneous measurement when measuring the distance from the vehicle to the object to be measured, and to measure the degree of danger depending on the environment. Accidents such as rear-end collisions can be avoided in advance because it is judged by the distance and displayed in stages. In addition, in the present device, by providing the first opening and the second opening to perform light irradiation and light reception in separate openings, the size of the opening of the light receiving unit can be set to that of the light irradiation unit. Since it can be formed independently of irradiation, the light receiving range of the above-mentioned reflected light from the DUT received by the light receiving means is limited to a more optimal light receiving range, and the disturbance light other than the reflected light from the DUT is Light reception is reduced to reduce erroneous measurement due to disturbance light. Furthermore, since this device is built into the rear-view mirror, it is possible to check the rear field of view, etc., and to reduce the fog removal effect when the defroster of the air conditioner is moved, it is possible to use this device during a collision. There is no need for a special structure such as an airbag for safety measures required only for the device, and there is no case where the distance such as the wiper cannot be measured due to the unwiped portion of the wiper, and the driver's view is not obstructed. .

6. Since this device can know the location of the measured object around the road by measuring the unevenness of the distance from the vehicle to the measured object for each measured irradiation angle, the type of the measured object can be determined from this arrangement. It is possible to discriminate and effectively display the visual or auditory information of the driver or the like to reduce erroneous measurement when measuring the distance from the own vehicle to the object to be measured, and to detect the degree of danger depending on the environment. Accidents such as rear-end collisions can be avoided in advance because it is judged according to the distance to the object to be measured and displayed in stages. In addition, in the present device, by providing the first opening and the second opening to perform light irradiation and light reception in separate openings, the size of the opening of the light receiving unit can be set to that of the light irradiation unit. Since it can be formed independently of irradiation, the light receiving range of the reflected light from the object to be measured which is received by the light receiving means is limited to a more optimal light receiving range,
The reception of disturbance light other than the reflected light from the object to be measured is reduced to reduce erroneous measurement due to the disturbance light. Furthermore, since this device is built into the rear-view mirror, it is possible to check the rear field of view, etc., and to reduce the fog removal effect when the defroster of the air conditioner is moved, it is possible to use this device during a collision. There is no need for a special structure such as an airbag for safety measures required only for the device, and there is no case where the distance such as the wiper cannot be measured due to the unwiped portion of the wiper, and the driver's view is not obstructed. .

7. This device can know the location of the measured object around the road by measuring the unevenness of the measured distance from the own vehicle to the measured object. The effective distance between the vehicle and the object to be measured can be reduced by reducing the erroneous measurement when measuring the distance from the vehicle to the object to be measured, and the distance to the object that may collide with the degree of danger depending on the environment. It is possible to avoid an accident such as a rear-end collision because it is judged according to the conditions and displayed in stages. In addition, in the present device, by providing the first opening and the second opening to perform light irradiation and light reception in separate openings, the size of the opening of the light receiving unit can be set to that of the light irradiation unit. Since it can be formed independently of irradiation, the light receiving range of the above-mentioned reflected light from the DUT received by the light receiving means is limited to a more optimal light receiving range, and the disturbance light other than the reflected light from the DUT is Light reception is reduced to reduce erroneous measurement due to disturbance light. Further, the present device is capable of confirming a desired rear field of view without changing the irradiation direction of the near infrared rays from the light irradiation unit by the mirror surface variable unit that is built in the rearview mirror and moves only the mirror surface. ,
Without reducing the defrosting effect when moving the defroster of the air conditioner, there is no need for a special structure such as an airbag for safety measures required only for this device in the event of a collision, and the wiper There is no case that the distance cannot be measured due to the unwiped portion of the vehicle, and the driver's visual field is not obstructed.

8. This device can know the arrangement of the measured object around the road by measuring the unevenness of the measured distance from the own vehicle to the measured object. It is determined as a fixed object, and if it is a fixed object, it is identified as an obstacle that interferes with road incidental equipment such as guardrails and the draft of the vehicle, and is effectively displayed by the driver's visual or auditory sense. Reduces erroneous measurements when measuring the distance from the vehicle to the DUT, and displays the risk level according to the environment based on the distance to the DUT that may cause a collision. The accident can be avoided. Then, the present apparatus provides the first opening and the second opening to perform light irradiation and light reception in separate openings,
Since the size of the opening of the light receiving part can be formed independently of the irradiation of the light emitting means, the light receiving range of the above-mentioned reflected light from the DUT received by the light receiving means is limited to a more optimal light receiving range. By reducing the reception of disturbance light other than the reflected light from the object to be measured, erroneous measurement due to the disturbance light is reduced. Further, the present device is capable of confirming a desired rear field of view without changing the irradiation direction of the near infrared rays from the light irradiation unit by the mirror surface variable unit that is built in the rearview mirror and moves only the mirror surface. , Without reducing the fogging removal effect when moving the defroster of the air conditioner, and eliminating the need for a special structure such as an airbag for safety measures required only for this device in the event of a collision, There is no longer a case where the distance cannot be measured due to the unwiped portion of the wiper, and the driver's view is not obstructed.

9. In this method, the optical measuring device is attached to the already installed interior mirror, so that the visibility of the rear of the vehicle can be confirmed and the distance to the object to be measured can be measured without impairing the function as the interior mirror. You can

[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 top view for explaining the configuration of the optical measuring device that is an embodiment of the present invention.

FIG. 3 is a front view for explaining the configuration of the optical measuring apparatus that is an embodiment of the present invention.

FIG. 4 is a top cross-sectional view for explaining the configuration of the optical measuring device that is an embodiment of the present invention.

FIG. 5 is a front cross-sectional view for explaining the configuration of the optical measuring device that is an embodiment of the present invention.

FIG. 6 is a side cross-sectional view for explaining the configuration of the optical measuring device that is an embodiment of the present invention.

FIG. 7 is a flowchart for explaining control of the optical measuring device according to the embodiment of the present invention.

FIG. 8 is a flow chart for explaining control of the optical measuring device according to the embodiment of the present invention.

FIG. 9 is a flowchart for explaining control of an obstacle determination subroutine of the optical measuring device according to the embodiment of the present invention.

FIG. 10 is a view for explaining measurement of an obstacle by the optical measuring device according to the embodiment of the present invention.

FIG. 11 is a view for explaining measurement of an obstacle by the optical measuring device according to the embodiment of the present invention.

FIG. 12 is a flow chart for explaining control of a risk determination subroutine of the optical measuring device according to the embodiment of the present invention.

FIG. 13 is a flow chart for explaining the control of the risk determination subroutine for another vehicle in the optical measuring device according to the embodiment of the present invention.

FIG. 14 is a flow chart for explaining control of a risk determination subroutine for another vehicle of the optical measuring device according to the embodiment of the present invention.

FIG. 15 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. 16 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. 17 is a view for explaining a rapid collision speed difference with respect to the speed of the own vehicle in the optical measuring device according to the embodiment of the present invention.

FIG. 18 is a flow chart for explaining control of an obstacle judgment subroutine for obstacles of the optical measuring device according to the embodiment of the present invention.

FIG. 19 is a flow chart for explaining control of a risk determination subroutine for obstacles of the optical measuring device according to the embodiment of the present invention.

FIG. 20 is a side view of the device for explaining the installation position of the optical measuring device of the present invention.

FIG. 21 is a front view of the device for explaining the installation position of the optical measuring device of the present invention.

FIG. 22 is a side view of the device for explaining the installation position of the conventional optical measuring device.

FIG. 23 is a front view of the device for explaining the installation position of the conventional optical measuring device.

[Explanation of symbols]

1, 100 ... Optical measuring device, 2 ... Light irradiation unit, 3 ... Pulse drive unit, 5 ... Light receiving unit, 7 ... Time / voltage conversion unit, 9 ...
A / D conversion section, 11 ... Arithmetic processing section, 21 ... Reflector drive section, 23 ... Reflector motor, 25 ... Own vehicle speed detection section, 5
DESCRIPTION OF SYMBOLS 1 ... Display part, 101 ... 1st opening part, 102 ... 1st opening part, 105 ... Mirror surface, 117 ... Irradiation plate, 118 ... Mirror surface movable part.

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[Procedure amendment]

[Submission date] September 12, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction content]

[Figure 10]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 11

[Correction method] Change

[Correction content]

FIG. 11

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G01S 17/93 G08G 1/16 A

Claims (9)

[Claims] 1. A light irradiating means for irradiating an object to be measured with light, a light receiving means for receiving reflected light of the light from the object to be measured, and the light irradiating means to apply the light to the object to be measured. The distance from the measurement point to the object to be measured is calculated by the time from the irradiation to the reception of the reflected light of the light by the light receiving means, and the type of the object to be measured is determined based on the calculated distance. An optical measuring device comprising: a rearview mirror; and an arithmetic processing unit that determines a degree of risk of collision with the object to be measured. 2. A light irradiating means for irradiating an object to be measured with light, a light receiving means for receiving reflected light of the light from the object to be measured, and the light irradiating means to apply the light to the object to be measured. The distance from the measurement point to the object to be measured is calculated by the time from the irradiation to the reception of the reflected light of the light by the light receiving means, and the type of the object to be measured is determined based on the calculated distance. An arithmetic processing unit that determines the degree of risk of collision with the measured object, and a built-in rearview mirror, and irradiates the measured object with the light by the light irradiation unit,
An optical measurement device, comprising: an opening provided on the rear surface of the mirror surface of the room mirror for receiving the reflected light of the light reflected by the object to be measured by the light receiving unit. 3. A light irradiating means for irradiating the object to be measured with light, a light receiving means for receiving reflected light of the light from the object to be measured, and the light irradiating means to apply the light to the object to be measured. The distance from the measurement point to the object to be measured is calculated by the time from the irradiation to the reception of the reflected light of the light by the light receiving means, and the type of the object to be measured is determined based on the calculated distance. , A processing unit for determining the degree of risk of collision with the object to be measured, and a built-in room mirror, the mirror surface of the room mirror for irradiating the light to the object to be measured by the light irradiation means. The first on the back
An opening portion; and a second opening portion provided on the rear surface of the mirror surface of the room mirror for receiving the reflected light of the light reflected by the object to be measured by the light receiving unit. Optical measuring device. 4. A light irradiating means for irradiating an object to be measured with light, a light receiving means for receiving reflected light of the light from the object to be measured, and the light irradiating means for applying the light to the object to be measured. The distance from the measurement point to the object to be measured is calculated by the time from the irradiation to the reception of the reflected light of the light by the light receiving means, and the type of the object to be measured is determined based on the value of the distance. An arithmetic processing unit that determines the degree of risk of collision with the object to be measured, and a light irradiation changing unit that has a built-in room mirror and that changes an irradiation angle of light from the light irradiation unit; and the light irradiation unit. Is provided on the rear surface of the mirror surface of the room mirror for irradiating the DUT with the light.
An opening portion; and a second opening portion provided on the rear surface of the mirror surface of the room mirror for receiving the reflected light of the light reflected by the object to be measured by the light receiving unit. Optical measuring device. 5. A light irradiation means for irradiating the object to be measured with light, a light receiving means for receiving reflected light of the light from the object to be measured, and the light irradiation means to apply the light to the object to be measured. The distance from the measurement point to the object to be measured is calculated by the time from the irradiation to the reception of the reflected light of the light by the light receiving means, and the type of the object to be measured is determined based on the value of the distance. An arithmetic processing unit that determines the degree of risk of collision with the measured object, and a distance from the measurement point processed by the arithmetic processing unit to the measured object, and the measured object. Display means for displaying any one or more of the types of objects and the degree of risk of collision of the object to be measured, and the room for irradiating the object to be measured with the light by the light irradiation means. Provided on the back of the mirror surface of the mirror First
An opening portion; and a second opening portion provided on the rear surface of the mirror surface of the room mirror for receiving the reflected light of the light reflected by the object to be measured by the light receiving unit. Optical measuring device. 6. A light irradiating means for irradiating the object to be measured with light, a light receiving means for receiving reflected light of the light from the object to be measured, and the light irradiating means to apply the light to the object to be measured. The distance from the measurement point to the object to be measured is calculated by the time from the irradiation to the reception of the reflected light of the light by the light receiving means, and the type of the object to be measured is determined based on the value of the distance. An arithmetic processing unit that determines the degree of risk of collision with the object to be measured, and a light irradiation variable unit that is included in a room mirror and that changes the irradiation angle of the light from the light irradiation unit; and the arithmetic processing unit. A display means for displaying any one or more of the distance from the measurement point to the object to be measured, the type of the object to be measured, and the degree of risk of collision of the object to be measured, On the object to be measured by the light irradiation means First provided the serial light on the back of the mirror surface of the room mirror for irradiating
An opening portion; and a second opening portion provided on the rear surface of the mirror surface of the room mirror for receiving the reflected light of the light reflected by the object to be measured by the light receiving unit. Optical measuring device. 7. A light irradiating means for irradiating the object to be measured with light, a light receiving means for receiving reflected light of the light from the object to be measured, and the light irradiating means to apply the light to the object to be measured. The distance from the measurement point to the object to be measured is calculated by the time from the irradiation to the reception of the reflected light of the light by the light receiving means, and the type of the object to be measured is determined based on the value of the distance. An arithmetic processing unit that determines the degree of risk of collision with the measured object, and a distance from the measurement point processed by the arithmetic processing unit to the measured object, and the measured object. Display means for displaying any one or more of the types of objects and the degree of risk of collision of the object to be measured, and the room for irradiating the object to be measured with the light by the light irradiation means. Provided on the back of the mirror surface of the mirror First
An opening, a second opening provided on the rear surface of the mirror surface of the room mirror for receiving the reflected light of the light reflected by the object to be measured by the light receiving unit, and a mirror surface of the room mirror. An optical measuring device, comprising: a mirror surface changing means for changing the angle to a desired angle. 8. A light irradiating means for irradiating the object to be measured with light, a light receiving means for receiving reflected light of the light from the object to be measured, and the light irradiating means to apply the light to the object to be measured. The distance from the measurement point to the object to be measured is calculated by the time from the irradiation to the reception of the reflected light of the light by the light receiving means, and the type of the object to be measured is determined based on the value of the distance. An arithmetic processing unit that determines the degree of risk of collision with the object to be measured, and a light irradiation variable unit that is included in a room mirror and that changes the irradiation angle of the light from the light irradiation unit; and the arithmetic processing unit. A display means for displaying any one or more of the distance from the measurement point to the object to be measured, the type of the object to be measured, and the degree of risk of collision of the object to be measured, On the object to be measured by the light irradiation means First provided the serial light on the back of the mirror surface of the room mirror for irradiating
An opening, a second opening provided on the rear surface of the mirror surface of the room mirror for receiving the reflected light of the light reflected by the object to be measured by the light receiving unit, and a mirror surface of the room mirror. An optical measuring device, comprising: a mirror surface changing means for changing the angle to a desired angle. 9. A light irradiating means for irradiating the object to be measured with light, a light receiving means for receiving reflected light of the light from the object to be measured, and the light irradiating means to apply the light to the object to be measured. The distance from the measurement point to the object to be measured is calculated by the time from the irradiation to the reception of the reflected light of the light by the light receiving means, and the type of the object to be measured is determined based on the calculated distance. An optical measuring device mounting method comprising: mounting an optical measuring device, which comprises an arithmetic processing unit that determines the degree of risk of collision with the object to be measured, to a rearview mirror.