JPH0611345A - Equipment for measuring and plotting position - Google Patents

Abstract

PURPOSE:To enable recognition of the state of a pole without using another means such as a transceiver, by a method wherein a state signal for discriminating the state of the pole having a target fitted is superposed on a pickup light projected to a position detecting means. CONSTITUTION:A target 2 composed of a light source 21 such as LED and a reflector 22 is fitted to a pole which indicates a position of measurement. A distance-measuring light is applied to the target 2 from a light-emitting element 4a of a position detecting means 4 and it is reflected by the reflector 22 and sensed by a light-sensing element 4b. Besides, a pickup light-sensing part 5 constructed of a quadruple light-sensing element is disposed in the rear of a beam splitter 4d so as to pick up an LED light of the target 2. A state detecting means is connected to the pickup light-sensing part 5 and the state of the pole is detected from a state signal contained in a pickup light being picked up. For instance, a pressure switch is incorporated in the ferrule of the pole, the pressure of the pole is sensed when it is set up, and a signal of 'being ready' is sent to the position detecting means 4. Thereby the state of the pole is made recognizable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position measuring and drawing apparatus for measuring the position coordinates of a predetermined object placed at the scene of a traffic accident and creating a plan view which is a sketch of the scene.

When a traffic accident occurs, it is necessary to grasp the situation of the site for accident investigation, and a police officer conducts a live condition inspection and prepares a record, and as a part of it, the distance between related objects. A site sketch (plan view) as shown in Fig. 12, which clarifies the positional relationship between the and surroundings, is created.

When creating such a floor plan,
Conventionally, an investigator directly measures the distance between related objects using a tape measure, and creates a plan view using the measurement result. However, measuring with a tape measure requires manpower,
It may be necessary to work with traffic blocked for a long time for measurement, which may cause traffic congestion at a site with heavy traffic, or a worker may be collided with a vehicle passing by. Accompany. Therefore, it is necessary to shorten the working time on the road as much as possible.

Therefore, the applicant of the present invention is easy to operate, can perform measurement work at the traffic accident site in the shortest possible time, and creates a site map at the accident site to create a site map of the accident site and the completed site map. We have proposed a position measurement plotting device that can quickly and easily perform collation with (Japanese Patent Laid-Open No. 2-281380). The invention according to the application is provided on an image display unit for displaying a captured image while capturing a target (or marker) previously placed at a desired position in an accident scene with a capturing unit such as a television camera and capturing the target. The pointing head is directed toward the target by the pointing means such as a cursor in the direction of the target, and the distance and angle from the reference position to the target are detected by the position detecting means and the coordinates thereof are detected. Is calculated, and a site sketch is created based on the calculated coordinates.

[0005]

However, it is necessary to prepare the target captured by the above-mentioned conventional position measurement plotting apparatus in a number substantially equal to that of the target object. Therefore, the target is fixed to a part of the rod-shaped pole, and the position to be measured is indicated by the tip edge of the pole, and the position measurement plotting device captures the target fixed to the pole, By calculating the coordinates of the tip edge of the pole from the data obtained for the target and instructing while moving the pole according to the related object to be measured, prepare the number of targets equal to the number of objects You don't have to.

However, in the case of performing measurement using the pole, separately from the operator who operates the position measurement drawing device,
When an operator who holds the pole is required and these persons are far from each other, for example, these persons communicate with each other using a transceiver or the like to determine whether the pole indicates a predetermined position or not. It is necessary to transmit information regarding the state of the pole, such as which of the leading edges of the pole indicates the predetermined position.

Since this information transmission needs to be performed for each related object to be measured, when there are many related objects to be measured, it takes a lot of preparation time to perform the measurement work. This hinders the speeding up of work.

Therefore, an object of the present invention is, when a target is fixed to a pole, a person who operates the position measurement plotting apparatus transmits information about the state of the pole from a worker who holds the pole to a transceiver or the like. It is an object of the present invention to provide a position measurement drawing device which can recognize the state of the pole without receiving it by a separate means.

[0009]

As a means for solving the above technical problems, a position measuring and plotting apparatus according to the present invention projects a light emitted from a light emitting unit onto a target arranged at an appropriate position and reflects the reflected light. A large number of spatial coordinates detected by the position detecting means with respect to a large number of target positions are provided by detecting the spatial coordinates of the target by measuring the distance to the target and its direction by capturing with a light receiving unit. In a position measurement plotting apparatus for creating a plan view from the above, in order to align the aim of the position detecting means with the target, a capture light emitting section for projecting capture light to a capture light receiving section provided in the position detecting means is provided. A state signal for identifying the state of the pole to which the target is attached is superimposed on the captured light emitted from the capture light emitting unit of the target to the position detecting means, The 置検 detecting means, it is characterized in that a state detection means for detecting the state of the pawl from the state signal superimposed on the captured light.

[0010]

When the aim of the position detecting means is roughly aligned with a predetermined target, the capture light receiving portion of the position detecting means captures the captured light emitted from the capture light emitting portion of the target to detect an aiming error. By controlling the direction of the measuring head so as to correct the error, the aim of the position detecting means is brought into a state in which it is accurately aligned with the target. Then, the state signal included in the captured light is received by the state detecting means of the position detecting means, the state of the pole to which the target is fixed is identified by the position detecting means, and, for example, the target is fixed. If a state signal indicating that the leading edge of the pole indicates a predetermined position is received, the measurement of the coordinates of the position is started.

That is, the light emitting section of the position detecting means projects light onto a target fixed to a pole, and the reflected light is received by the light receiving section to measure the spatial coordinates of the target. Since it is fixed at a predetermined position with respect to the leading edge, the spatial coordinates at the predetermined position are measured by a predetermined calculation. Then, the coordinates of a predetermined position regarding an appropriate number are measured and a plan view is created from these position coordinates.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The position measuring and drawing apparatus according to the present invention will be described in detail below with reference to the illustrated embodiments.

FIG. 2 is a perspective view showing a state in which the target 2 according to the present invention is fixedly attached to the pole 1.
Two targets 2 of target 2a and second target 2b
Is fastened. Further, both ends of the pole 1 are sharply formed as stone protrusions 3a and 3b. When designating a position to be measured, one of the stone protrusions 3a and 3b is set to a position such as a ground or a road surface. The pole 1 is set in an upright position by pushing it to the part to be measured. That is, if the stone protrusion 3a is pushed up to the road surface, the first target 2a is located on the lower side and the second target 2b is located on the upper side.
If the stone protrusions 3b are pushed to the road surface, the first target 2a is located on the upper side and the second target 2b is located on the lower side. Then, the distance measuring light (distance measuring light) emitted from the position detecting means described later is generated by these targets 2a,
2b is reflected in a predetermined direction.

FIG. 3 shows the position detecting means 4 and the target 2.
2 shows a schematic configuration of. The target 2 is composed of a light source 21 such as an LED as a trapping light emitting portion and a reflector 22 such as a corner cube, and the light incident on the target 2 is reflected by the reflector 22 in a predetermined direction. Further, as shown in FIG. 4A, the light source 21 is arranged in a circular shape so as to surround the reflector 22, and the light source 21 is also arranged in the central portion of the reflector 22. In this way the light source is also in the center
If 21 is provided, the image of the circular light source 21 becomes relatively large at the time of short-distance measurement, and a four-divided light receiving element described later enters the inside of the image of the light source 21 arranged in a circular shape. The trapped light from 21 does not stop entering the light receiving element, and the controllability can be improved. Further, by changing the modulation frequency of the trapped light emitted from the light source 21 between the light source 21 of the first target 2a and the light source 21 of the second target 2b, it is possible to distinguish between the two targets.

As shown in FIG. 3, the position detecting means 4 is provided with a distance measuring light emitting element 4a as a distance measuring light emitting section and a distance measuring light receiving element 4b as a light receiving section. Distance measuring light emitted from the light emitting element 4a toward the target 2 is reflected by the reflector 22 and captured by the light receiving element 4b. The light emitted from the light-emitting element 4a for distance measurement passes through the beam splitter 4c, is reflected by the beam splitter 4d in a substantially right angle direction, and is projected onto the target 2. And
The reflected light from the target 2 is reflected by the beam splitter 4d, further reflected by the beam splitter 4c, and incident on the distance measuring light receiving element 4b. A capture light-receiving unit 5 for capturing the target 2 is disposed behind the beam splitter 4d, and light emitted from the light source 21 of the target 2 passes through the beam splitter 4d and enters the capture light-receiving unit 5. It is incident. The beam splitter
An objective lens 4e is provided in front of 4d.

As shown in FIG.
Each of the light receiving elements 5a, 5b, 5c is composed of a multi-divided light receiving element such as a four-divided light receiving element
The output signal of 5d is input to the position calculation means. Now
Assuming that the output voltage values of these light receiving elements 5a, 5b, 5c, 5d are Ea, Eb, Ec, Ed, respectively, in the position calculating means, for example,

[Equation 1] (Ea + Eb)-(Ec + Ed) = K

## EQU2 ## (Ea + Ec)-(Eb + Ed) = L is calculated. These output voltage values Ea, Eb, Ec, Ed
Changes depending on the incident position on the capture light receiving unit 5, and the four output voltages are not “0”, and the values K and L in the equations 1 and 2 are
When both are “0”, the light from the light source 21 is incident on the central portion of the captured light receiving portion 5 and the captured light from the light source 21 is received by the light receiving elements 5a, 5b, as shown by the symbol P in FIG. This means that they are evenly incident on 5c and 5d.

A state detecting means is connected to the capture light receiving section 5, and the state of the pole 1 is detected from a state signal included in the capture light captured by the capture light receiving section 5.

FIG. 1 is a time chart of the trapped light emitted from the light source 21 of the target 2. The time chart shown in the upper part of FIG. 1 is for the trapped light when the status signal is not superposed, for example, the period T1, the light emission time. Captured light is emitted by a pulse that blinks at T3. A case where the above-mentioned state signal is superimposed on the captured light is shown in the lower side of the figure. For example, a state in which the captured light is raised by the ON state of the switch described later at a cycle T1 / 2 of 1/2 of the captured light. , A pulse appears, and the light source 21 is turned on in the rising state. That is, in FIG. 1, the switch S1, the switch S4, the switch S5, and the switch S6 are OFF and the light source is
21 is off, switch S2 and switch S3 are ON
This shows a case where the light source 21 is turned on and the light source 21 is turned on. Then, before and after the pulse indicating the state of these switches S1 to S6 is sandwiched by a start pulse and a stop pulse. Therefore,
If there are six switches indicating the state of pole 1, an 8-bit signal is required.

FIG. 6 is a block diagram showing the outline of the circuit of the state detecting means of the target 2 and the position detecting means 4. The light source 21 composed of the LED of the target 2 is driven by the LED lighting circuit 21a to blink. A counter synchronization circuit 21b is connected to the LED lighting circuit 21a, and the counter synchronization circuit 2b
An oscillator circuit 21c for outputting the LED light emission pattern shown in FIG. 1 and a parallel-serial converter circuit 21d are connected to 1b. Then, this parallel-serial conversion circuit 21
A switch input circuit 21e is connected to d, and ON-OFF signals of various switches S1 to S6 are input to the switch input circuit 21e. Therefore, the captured light emitted from the light source 21 is turned on by the switches S1 to S6 in the LED emission pattern.
-OFF will blink according to the synthesized pulse. Further, these switches S1 to S6 are, for example, the switch S1.
The switch S2 turns on when the stone protrusion 3a indicates a predetermined position, and the switch S2 turns on when the stone protrusion 3b indicates a predetermined position.
It is a switch for N. That is, these stone projections 3
A pressure switch is built in a and 3b, and when the pole 1 is leaned against the stone projections 3a and 3b, the pressure is sensed and turned on. The switch S3 is a ready switch and is turned on by an operation of a person holding the pole 1 when the tip edge of the pole 1 indicates a predetermined position. The switch S4 is a battery check switch which is turned on when the voltage of the battery is below a predetermined voltage. The switches S5 and S6 are spare switches.

In the position detecting means 4, the capture light emitted from the light source 21 is captured by the capture light receiving section 5 which is composed of a four-division light receiving element. Each element of the capture light receiving unit 5 has an amplifier
A counter synchronization circuit 5f is connected via 5e, and an oscillation circuit 5g and a serial-parallel conversion circuit 5h are connected to the counter synchronization circuit 5f. A register 5i having a memory corresponding to the switches S1 to S6 is connected to the serial-parallel conversion circuit 5h, and a clock pulse for latching is input from the counter synchronization circuit 5f to the register 5i. . Therefore, the light source 21 is
Data corresponding to ON-OFF of the switches S1 to S6 included in the trapped light emitted from is registered.

In addition, each element of the capture light receiving section 5 includes a bandpass filter 41, a synchronous detection circuit 42, and an AD conversion circuit 43.
The optical axis shift amount detecting means 13b composed of is connected. The output of each element of the capturing / receiving unit 5 is a bandpass filter.
41, the synchronous detection circuit 42 generates a voltage corresponding to the amount of trapped light incident on each element from the light source 21, is digitally converted by the AD conversion circuit 43, and is input to the position calculation means.

Next, the structure of the position measurement plotting apparatus main body is shown in FIG.
It will be described with reference to FIGS.

FIG. 8 shows a scene of a traffic accident or the like for which a site sketch is to be prepared. The photographing means 6 (see FIG. 10) such as a television camera and the position detecting means 4 are combined at appropriate positions on the scene. A measuring head 11 is installed to take a picture of the situation at the site. Further, the optical axis of the position detecting means 4 incorporated in the measuring head 11 and the optical axis of the photographing means are parallel to each other, and the photographing means 6 captures the target 2 near the center of the screen. Output signal of split light receiving element is "0"
However, the values K and L in the equations 1 and 2 are both “0”.
When the direction of the measuring head 11 is controlled so that
The optical axis of the position detecting means 4 penetrates the center of the target 2. The measuring head 11 is supported by vertical rotating means 11a for appropriately tilting the optical axis of the measuring head 11 in a vertical plane and horizontal rotating means 11b for properly tilting the optical axis in a horizontal plane. And these rotating means 11
The measuring head 11, that is, the position detecting means 4 is operated by the operation of a and 11b.
The optical axis S (see FIG. 3) can be changed to an appropriate direction.

A control unit 13 shown in FIG. 9 is connected to the measuring head 11 by a cable 12, and the control unit 13 includes the position calculating means. The control unit 13 includes an image display means 14 such as a CRT for displaying an image photographed by the photographing means 6 incorporated in the measuring head 11 and a computer 15 for performing input / output processing and calculation. . Further, the computer 15 is connected with a mouse 16 which is an input means for inputting predetermined information regarding a site sketch to be drawn, and an XY plotter 17 for printing the sketch. Further, the control unit 13 is supplied with power from a backup power source 18, and the backup power source 18 can be connected to a commercial power source via a cord 18a, and
It can also be connected to a vehicle battery via 18b.

FIG. 10 and FIG. 11 are block diagrams showing the structure of the position measurement drawing device and a part of the signal. The light source 21 such as an LED is driven by an LED lighting circuit 21a,
The D lighting circuit 21a includes a counter synchronization circuit 21b shown in FIG.
The light source 21 is driven according to the output signal of the state detection transmission circuit 23 configured by the parallel-serial conversion circuit 21d and the like.

The capture light emitted from the light source 21 is captured by the capture light receiving section 5 of the measurement head 11, and the output signal of the capture light receiving section 5 is included in the capture light from the light source 21 of the control section 13. State detecting means 13a for detecting the state of the pole 1 from the signal
And the captured light from the light source 21 is input to the optical axis shift amount detection means 13b for detecting that the captured light is incident on the appropriate position of the captured light receiving section 5. Further, the distance measuring light emitted from the distance measuring light emitting element 4a of the measuring head 11 and reflected by the reflector 22 of the target 2 is incident on the distance meter 13c to measure the distance to the target 2. This rangefinder 13c is the computer 1
The reflector distance measurement data 13d is output to the computer 15a according to the distance measurement command signal 13e from 5e. Measuring head 11
Is supported by the vertical rotation means (elevation motor) 11a and the horizontal rotation means (swing motor) 11b, and these motors 11a and 11b are driven by the angle command motor control signal 13f from the computer 15a. The elevation encoder 11c and the swing encoder 11d are connected to the motors 11a and 11b, respectively.
The rotational angular positions of a and 11b are detected by an angle reading counter 13g connected to these encoders 11c and 11d.

On the other hand, the photographing means 6 is controlled by the camera control signal 13h sent from the computer 15e of the control unit 13. Further, the TV image 13i output from the photographing means 6 is a computer 15 having an image switching function as shown in FIG.
d and sent to the still image holding means 13m.

When the output of the state detecting means 13a is a measurable signal, the computer 15a calculates the reflecting mirror position data 13j from the reflecting mirror distance measurement data 13d and the angle data of the output of the angle reading counter 13g. The obtained reflector position data 13j is used as data when the computer 15c performs sketch drawing processing to create sketch drawing data 13n. Further, the optical axis shift amount detection means 13b
And the output of the angle reading counter 13g is the angle movement command signal 13h.
At the same time, it is calculated by the computer 15b and output as the angle command motor control signal 13f. Further, the TV image 13i is the computer 15d and the still image holding means 13.
The output of the still image holding means 13m is sent to the computer 15d. Furthermore, the above sketch data 1
3n is also input to the computer 15d, and these are sent to the image display means 14 in a switchable manner through the computer 15f which performs image composition. Therefore, in the image display means 14, the situation of the scene captured by the photographing means 6 and the still image are captured. It is possible to select and display the still image held by the holding means 13m and the sketch data 13n being created or completed.

The computer 15c creates the sketch drawing data 13n according to the drawing command signal, and the sketch drawing data 13n is generated.
Is divided into accident information data 13p related to the accident and map information data 13q related to the road at the accident site, and is stored in the disk 13s from the disk drive 13r. Data related to drawing such as characters and symbols, sketch frame 13t or symbols and drawing pattern 13u stored in advance in the disk 13s is transferred from the disk drive 13r to the computer 15c.
Provided to.

The output signal of the mouse 16 is sent to the mouse driver 16a, and the mouse cursor display signal 16b output from the mouse driver 16a is sent to the computer 15f.
To the image display means 14, and the various image signals are displayed by the computer 15e.
And is issued to a predetermined site. This computer 1
Screen data 13y for various commands from the disk drive 13r is also input to 5e, and the mouse / cursor display signal is input.
Various control signals 13x are calculated by comparison with 16b and issued to a predetermined part. Further, various command screen data 13y is sent to the computer 15f and displayed on the image display means 14,
It is used as a display when various commands are specified by the mouse 16. Sketch print command signal 17a out of various control signals 13x
Is sent to the plotter controller 17b, and the XY plotter 17 is driven by the plotter controller 17b.

The operation of the position measuring / drafting apparatus according to the present invention constructed as described above will be described together with the manner of creating a site sketch.

As shown in FIG. 8, the measuring head 11 is installed at an appropriate position on the site where the sketch is to be created. Since the measuring head 11 is provided with the position detecting means 4, the position detecting means 4 is also arranged on the site. On the other hand, the pole 1 to which the target 2 is attached is held at the position where the coordinates should be measured, and the light source 21 and the reflector 22 of the target 2 are held.
Is opposed to the measuring head 11. The image photographed by the photographing means 6 provided in the measuring head 11 is displayed on the image display means.
The mouse 16 is operated to give an instruction so that the target 2 is imaged on the target 14, and the vertical angle and the horizontal angle of the measuring head 11 are adjusted by the angle movement command signal 16k.

When the photographing means 6 of the measuring head 11 captures the target 2 near the center of the screen, the capture light emitted from the light source 21 of the target 2 enters the capture light receiving section 5 of the position detecting means 4. The light source 21 of the target 2
The captured light emitted from the captured light receiving portion 5 of the position detecting means 4
When incident on the light receiving element 5 of the capture light receiving unit 5,
It will be incident on any one or more of a, 5b, 5c, and 5d. The computer 15a, which is a position calculating means, performs the calculations shown in the above equations 1 and 2 from the output signal of the optical axis shift amount detecting means 13b.
An angle command motor control signal 13f, which is an actuation signal, is sent to the vertical rotation means 11a and the horizontal rotation means 11b so that the values K and L of the equation become equal to or less than predetermined values. That is, when the vertical rotation means 11a and the horizontal rotation means 11b are operated based on this operation signal, the direction of the optical axis of the position detection means 4 changes, so that the incident position on the capture light receiving unit 5 also changes. . While monitoring this change by the position calculation means, the position detection means 4 is appropriately rotated by the vertical rotation means 11a and the horizontal rotation means 11b, and the light captured by the light source 21 is received by the light receiving elements 5a, 5b, 5c. , 5d, and the distance measuring light from the distance measuring light emitting element 4a of the position detecting means 4 is reflected by the reflector 22 of the target 2 and enters the distance measuring light receiving element 4b at that position. By doing so, the distance measuring light projected from the distance measuring light emitting element 4a toward the target 2 can be reliably captured by the distance measuring light receiving element 4b.

As shown in FIG. 1, a state signal used for identifying the state of the pole 1 is superimposed on the trapped light, so that this state signal is also trapped by the trapping light receiving section 5. Become. This status signal is, as shown in FIG.
After parallel conversion, it is registered in the register 5i, and the state of the target is identified by the ON / OFF state of the switch of the register 5i. For example, in the state signal shown in FIG. 1, since the switch R2 and the switch R3 are turned on,
When the switch R2 is turned on, the pole 1 is in a state of instructing a predetermined position by the stone protrusion 3b, and when the switch R3 is turned on, it indicates that the preparation for measurement is completed. And
When the ON signal of the switch R3 is captured, the distance measurement of the target 2 is started, and at the same time, the elevation angle and the turning angle of the position detecting means 4 are input to the computer 15a including the angle reading counter 13g.

That is, if the distance-measuring light emitted from the distance-measuring light-emitting element 4a is captured by the distance-measuring light-receiving element 4b, a straight line from the position detecting means 4 to the target 2 is obtained according to the principle of the known light-wave distance meter. The distance can be measured. The angle rotated by the vertical rotation means 11a becomes the elevation angle or depression angle from the position detection means 4 to the target 2 in the vertical plane, and the angle rotated by the horizontal rotation means 11b is the deflection angle in the horizontal plane ( Therefore, the spatial coordinates (three-dimensional coordinates) of the target 2 can be calculated from these straight line distances, elevation angles, depression angles, and deflection angles.

Then, the measurement of the target 2 is performed by using two targets 2 for one position to be measured.
Do each of a and 2b. For example, when the stone protrusion 3a is pushed against the road surface to stand the pole 1, the target 2a is located at the lower position and the target 2b is located at the upper position. It should be noted that when the stone protrusion 3a indicates a predetermined position, the switch S1 for identifying the state of the target 2 is turned on. Since the stone protrusion 3a is on the straight line connecting the targets 2a and 2b, the spatial coordinates of the stone protrusion 3a, that is, the position to be measured can be calculated from the spatial coordinates of these two targets 2a and 2b, and the spatial coordinates can be calculated on the horizontal plane. If it is projected on, plane coordinates can be obtained. Furthermore, if the modulation frequencies of these two targets 2a and 2b are made different, it can be determined which of the targets 2a and 2b the acquired spatial coordinates are, and the spatial coordinates of the position to be measured can be calculated. There is no mistake.

FIG. 7 shows an image obtained by photographing the situation of the site by the photographing means 6. For example, the position Q to be measured may be below the accident vehicle 30 or may be on the opposite side of the accident vehicle 30. Therefore, the position Q to be measured cannot be directly captured by the measuring head 11 equipped with the photographing means 6, and when the pole 1 is set upright, the target 2 becomes a shield for the accident vehicle 30 and becomes a shadow. It shows the method of measurement in the situation that is hidden by. In such a situation, the pole 1 may be appropriately tilted so that neither of the targets 2a and 2b is blocked by the accident vehicle 30 which is a shield. That is, even if the pole 1 is inclined, the stone projection 3b indicating the position Q is arranged on the same straight line as the targets 2a and 2b. The spatial coordinates of the portion 3b can be calculated, and the coordinates of the position Q to be measured can be acquired. When the stone protrusion 3b is pressed to the position Q, the pressure switch S2 is turned on, and a state signal indicating that the stone protrusion 3b indicates the position to be measured is sent. In this case, using the pole 1 in which the distance from the stone protrusion 3b to the second target 2b is longer than the distance from the stone protrusion 3a to the second target 2a, the position Q is set by the stone protrusion 3b.
Is instructing. Further, when the position to be measured is at a high position such as the position R shown in FIG. 7, the target 2 cannot be placed at the position R, but as shown in FIG. It can be measured by pointing R. In this case, the position R is pressed by the stone protrusion 3b to turn on the switch S2.

When the measurement position is designated by the stone protrusion 3b, the distance from the stone protrusion 3b to the target 2a is set to be twice as long as the distance from the stone protrusion 3b to the target 2b.
The spatial coordinates of 2a and 2b are (Xa, Ya, Za) and (X
b, Yb, Zb), and the spatial coordinates of the measurement position are (X, Y,
Z)

[Formula 3] (X + Xa) / 2 = Xb

[Formula 4] (Y + Ya) / 2 = Yb

## EQU00005 ## Since (Z + Za) / 2 = Zb, the spatial coordinates (X, Y, Z) of the measurement position are calculated from these equations (3), (4) and (5).

## EQU6 ## X = 2 * Xb-Xa

(7) Y = 2 * Yb−Ya

## EQU8 ## It can be obtained as Z = 2 * Zb-Za. In this way, the target 2b is arranged at an intermediate position between the stone protrusion 3b and the target 2a,
If the target 3b is used to indicate the measurement position, as long as the target 2b is at the intermediate position between the stone protrusion 3b and the target 2a, the measurement position can be calculated by the above formulas 6, 7, and 8. . Needless to say, the measurement position can be calculated by changing the mathematical expression even when the target 2b is not at the intermediate position between the stone protrusion 3b and the target 2a.

Further, as shown in FIGS. 2 and 7, if the targets 2a and 2b are arranged so as to be offset from the center of the pole 1 to one end, for example, the stone projection 3a side, the accident vehicle 30
3b if the height of the shield is lower than
Target 2 by using the
Since both a and 2b are located above the upper end of the shield, it is not necessary to tilt the pole 1.

Then, as shown in FIG. 8, poles 1 are used to point to relevant objects whose positions are to be measured, such as utility poles 51 and 52, street lights 53, road signs 54, and pedestrian crossings 55, and respective targets 2 are displayed. Measure the spatial coordinates of. Once the spatial coordinates for these objects of interest have been obtained, they are projected onto a horizontal plane. Then, a site sketch as shown in FIG. 12 is created from these projected coordinates. In addition, the creation of this site sketch is performed by the image display means 14 described above.
It is only necessary to print with the XY plotter 17 while displaying it on the screen.

In this embodiment, the case where two targets 2a and 2b are fixed to one pole 1 has been described, but even if one target 2 is fixed to one pole 1, Measurement can be performed by vertically using the pole 1 or by changing the position of the target 2a to two predetermined positions of the pole 1.

As a method of superimposing the status signal on the trapped light emitted from the target 2, the case where the status signal is added to the portion corresponding to the 2/1 cycle of the trapped light has been described in the present embodiment. It is also possible to identify the state of the target by the above method, for example, by the emission time of trapped light.

[0043]

As described above, according to the position measuring and plotting apparatus of the present invention, the trapping light emitted from the target for trapping the target by the position detecting means is
Since the state signal for identifying the state of the pole is superimposed, when the target is captured by the position detecting means, the state signal of the pole can also be captured, and whether or not it is in the measurement state and the vertical direction of the target It is possible to identify such a situation.

Therefore, it is not necessary for the operator who operates the position detecting / drawing apparatus main body and the operator who holds the pole to communicate with each other by a transceiver or the like, and it is possible to speed up the work and save labor.

Moreover, since the target is reliably captured by the position detecting means for measuring the position, the position detecting means does not have to be additionally provided with means for directing the position detecting means to the target, and the position can be increased without increasing the number of parts. The state signal can be reliably captured by the detection means.

Further, since the position of the object can be measured in a shorter time than in the case of directly measuring with a tape measure or the like, the traffic can be cut off in a short time.

In addition, since the site sketch can be immediately created at the accident site, the completed site sketch can be compared with the site, and a more accurate record can be created.

[Brief description of drawings]

FIG. 1 is a time chart of captured light emitted from a target of a position measurement plotting apparatus according to the present invention and captured light in which a status signal is superimposed.

FIG. 2 is a perspective view of a pole to which a target of the position measurement plotting apparatus according to the present invention is fixed.

FIG. 3 is a schematic diagram illustrating a structure of an apparatus for aiming a target of a position detection unit.

FIG. 4 is a diagram showing a schematic configuration of a target, in which (a) is a front view and (b) is a side view.

FIG. 5 is a schematic view showing a structure of a capture light receiving unit.

FIG. 6 is a block diagram showing an outline of a circuit of a state detecting unit of a target and a position detecting unit.

FIG. 7 is a perspective view showing a state where a predetermined position is being measured at the accident site.

FIG. 8 is an explanatory diagram of a site used for creating a site sketch.

FIG. 9 is a schematic configuration diagram related to a control unit of the position measurement drawing device.

10 is a block diagram showing a configuration of a position measurement drawing device and a part of a signal, part of which is shown in an overlapping manner with FIG.

11 is a block diagram showing a configuration of a position measurement drawing device and a part of a signal, a part of which is shown overlapping FIG.

FIG. 12 is a site sketch of the site shown in FIG.

[Explanation of symbols]

 1 pole 2a 1st target 2b 2nd target 3a, 3b Stone projection 4 Position detecting means 4a Distance measuring light emitting element 4b Distance measuring light receiving element 5 Capture light receiving section 11 Measuring head 11a Vertical rotating means 11b Horizontal rotating means 13 Control Part 14 Image display means 15 Computer 16 Mouse 17 XY plotter 18 Backup power supply 21 Light source (capturing and emitting part) 22 Reflector

Claims (1)

[Claims] 1. A spatial coordinate of the target is detected by measuring the distance and the direction to the target by projecting light from a light emitting unit to a target arranged at an appropriate position and capturing the reflected light by a light receiving unit. In a position measurement drawing device that includes position detection means and creates a plan view from a large number of spatial coordinates detected for a large number of target positions by the position detection means, in order to aim the position detection means at the target, The target is fixed to the capture light projected from the capture light emitting unit of the target including the capture light emitting unit that projects the capture light to the capture light receiving unit provided in the position detecting unit to the position detecting unit. A state signal for identifying the state of the pole is superposed, and the position detecting means is provided with state detecting means for detecting the state of the pole from the state signal superposed on the captured light. Position measuring plotter characterized and.