JPH08285585A - Camera unit for photographic survey - Google Patents

Abstract

PURPOSE: To execute the measuring work of an interval between two photographed positions without complicating the working steps in the overall photographic surveying work. CONSTITUTION: A tripod 7 capable of being installed on a ground 5 and a camera 22 having a casing 1 and being movable to the tripod 7 and the casing 10 are provided. Relatively approachable or retractable take-up shaft 29b and end 29c are respectively installed at the casing 10 and the camera 22, and a measuring unit 27 capable of detecting a distance L1 between the casing 10 and the camera 22 installed at the shaft 29b and the end 29c is installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photogrammetric camera unit suitable for use in photogrammetry for detecting three-dimensional shapes such as topography based on stereoscopic photographed images.

[0002]

2. Description of the Related Art Conventionally, photogrammetry has been carried out to analyze and detect the three-dimensional shape of a subject such as terrain based on a photographic image obtained by stereoscopically photographing the subject. The three-dimensional shape of the object is analyzed by setting the interval between the two imaging positions for performing stereo imaging to a predetermined size calculated by the distance between the two imaging positions and the object. It is known that detection can be performed as accurately as possible. In the analysis and detection of the three-dimensional shape, it is often convenient that the size of the interval between the two imaging positions is known in terms of simplification of analysis and detection.

[0003]

However, in the prior art, the work of measuring the interval between two shooting positions for stereo shooting has been performed as an independent work separate from the shooting work.
It was inconvenient because the work process in the whole photogrammetry work became complicated. In view of the above circumstances, the present invention provides a convenient camera unit for photogrammetry, which can perform the measurement work of the interval between two photographing positions without complicating the work process in the whole photogrammetry work. It is an object.

[0004]

The first invention of the present invention has an installation body (7, 10) which can be installed on the ground (5), and is provided with respect to the installation body (7, 10). A camera (22) is provided so as to be movable, and two measuring ends (29b, 29c, 40, 41) that are relatively movable toward and away from each other are attached to the installation body (7, 10) and the camera (22). And the measurement ends (29
b, 29c, 40, 41) and the measuring means (27, 42) capable of detecting the interval (L1) between the installation body (7, 10) on which the camera (22) is installed. The second invention of the present invention is the camera according to the first invention, wherein the measuring means (27, 42) includes the camera (22).
On the side or the camera (22), the measuring means (27, 4)
The distance display section (26b) capable of displaying the distance (L1) detected in 2) is provided. A third invention of the present invention is the second invention, wherein the interval display section (26b) is a viewfinder (26) of the camera (22).
It is provided inside. The fourth invention of the present invention is
In the first invention, the measuring means (27) has a measuring band (29a) and a winding section (29b) capable of winding / unwinding the measuring band (29a). One of the tip portion (29c) and the winding portion (29b) is connected to the camera (22), and the other is connected to the installation body (10). A fifth aspect of the present invention is the ultrasonic distance measuring means (42) according to the first aspect, wherein the measuring means (42) includes an ultrasonic wave transmitting / receiving part (40) and an ultrasonic wave reflecting part (41). ), And the ultrasonic transmitter / receiver (4
0) and the ultrasonic wave reflecting portion (41) are the two measuring end portions (40, 41). Further, a sixth invention of the present invention is the same as the first invention, wherein the installation main body (10) or the camera (22) has photographic images (SG1, SG2) taken by the camera (22) and the measurement. Based on the interval (L1) detected by the means (27, 42), an analysis calculation unit (11) capable of performing a survey analysis calculation for the photographed photographic images (SG1, SG2) is provided. A seventh invention of the present invention is the first invention, wherein the installation body (7) is the ground (5).
It consists of a tripod (7) that can be installed on top. An eighth aspect of the present invention is the seventh aspect of the invention, wherein the grounding portion (7a) of the tripod (7) is fixed to the ground (5) via anchor means (7b). It is characterized by The numbers in parentheses () indicate the corresponding elements in the drawings for convenience, and therefore the present description is not limited to the description in the drawings. The same applies to the following “action” column.

[0005]

According to the first aspect of the present invention having the above-described structure, the photographing in the photogrammetry is performed by the installation main body (7, 1).
0) is installed on the ground (5), the camera (22) is sequentially arranged at two photographing positions (KP1, KP2), and the subject is sequentially photographed by the camera (22) at each of these photographing positions (KP1, KP2). It is performed so as to photograph, and the distance (L1) between the camera (22) and the installation body (7, 10), that is, the arrangement position (HP) of the camera (22) and the installation position of the installation body (7, 10). Interval between (SP) (L
1) is detected by the measuring means (27, 42), respectively. According to a second aspect of the present invention, a camera (22)
To move the camera (22) to the shooting position (KP2),
At the current arrangement position (HP) of 2), by looking at the interval display portion (26b), the measuring means (27, 42)
Know the interval (L1) detected by. In the third aspect of the present invention, the image in the viewfinder (26) is viewed by looking into the viewfinder (26) and the camera (2
2) judges whether or not the appropriate image is captured, and looks at the viewfinder (26) to see the interval display section (26b) in the viewfinder (26) and move while holding the camera (22). Current placement position (HP)
Is determined to be suitable as the photographing position (KP2). According to a fourth aspect of the present invention, a camera (2
In order to position 2) at the shooting position (KP2), an operator or the like moves the camera (22) while holding it.
The measuring band (29a) of the measuring means (27) provided between the camera (22) and the installation body (10) is the camera (2).
According to the space (L1) between 2) and the installation body (7, 10), the winding / unwinding is performed with respect to the winding section (29b). Further, in the fifth aspect of the present invention, in order to arrange the camera (22) at the photographing position (KP2), a worker or the like moves the camera (22) with respect to the installation body (7, 10). In the ultrasonic distance measuring means (42), the distance between the ultrasonic wave transmitting / receiving unit (40) and the ultrasonic wave reflecting unit (41) is different between the camera (22) and the installation body (7, 10). It is set corresponding to the interval (L1) between them. In the sixth aspect of the present invention, an image is taken based on a distance (L1) between two image pickup positions (KP1, KP2) derived from an interval (L1) detected by the measuring means (27, 42). Surveying analysis calculation is performed on the photographed images (SG1, SG2). In the seventh invention of the present invention,
Photogrammetric work is performed by one worker. In the eighth aspect of the present invention, the self-supporting tripod (7) is fixed to the ground (5) via the anchor means (7b).

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view showing an example of a photogrammetric camera unit according to the present invention, FIG. 2 is a plan view of the photogrammetric camera unit shown in FIG. 1, and FIG. 3 is a photogrammetric camera unit shown in FIG. 4 is a plan view showing a surveying site, FIG. 5 is a view showing the inside of a finder of the photogrammetric camera unit shown in FIG. 1, and FIG. 6 is a diagram showing a photogrammetric camera unit according to the present invention. It is the front view which showed another example.

As shown in FIG. 4, the survey site 1 is near the foot of a mountain having a mountain 2, and the slope of the mountain 2 is provided with a slope 3 formed by excavation or the like. Further, in front of the slope 3 (on the left side of the paper surface of FIG. 4), a camera unit 6 for photogrammetry according to the present invention is installed on a substantially horizontal ground 5. As shown in FIG. 1, the camera unit 6 for photogrammetry has a tripod 7 that stands on the ground 5 in an independent manner.
A casing 10 is supported and provided on the upper end side of the tripod 7 (note that the grounding portion 7a of the tripod 7 is provided with appropriate anchor means 7b as shown by the chain double-dashed line in FIG.
The ground contact portion 7a may be fixed to the ground 5 via the anchor means 7b. ). The casing 1
A control unit 11 is built in 0. That is, the control unit 11 has a main control unit 12 as shown in FIG. 3, and the main control unit 12 is connected to the main control unit 12 via a bus line 12a.
Input unit 13, output unit 15, memory unit 16, arithmetic unit 17,
The display unit 19, the camera control unit 20, and the measuring device control unit 21 are connected. The input unit 13 is composed of operation buttons and the like arranged on the upper surface side of the casing 10, as shown in FIG. Also, the display unit 19 is the display control unit 1.
The display control unit 19a includes a first display 1 having a screen on the upper surface side of the casing 10.
9b and the second display 19c are connected.

On the other hand, one side surface 1 of the casing 10
The camera holder 10b is provided on the 0a side (the front side of the plane of FIG. 1 and the upper side of the plane of FIG. 2).
A camera 22 is removably attached to the camera b with the lens portion 22 a of the camera 22 facing the casing 10. As shown in FIGS. 1 to 3, the camera 22 is provided with an image creating unit 23 that can receive light rays collected through the lens unit 22a and create a photographic image in the form of digital information. And a shutter operation unit 25 capable of driving a predetermined shutter (not shown) capable of blocking and passing light rays between the lens unit 22a and the image creating unit 23.
(For example, a button provided on the casing of the camera 22)
Is provided. Further, the camera 22 is provided with a predetermined finder 26.
As shown in, an image display unit 26a for displaying an image of the subject captured by the lens unit 22a is provided. A numerical value display unit 26b capable of displaying numerical values and the like is provided at the lower right of the image display unit 26a in FIG. Note that, of the camera 22, the image creation unit 23 and the numerical value display unit 26b.
3 is communicated with the camera control unit 20 of the control unit 11 described above via an electric cable or the like (or a predetermined radio wave communication unit or the like not shown), as shown in FIG.

On the other hand, a measuring device 27 is provided on the side surface 10a side of the casing 10 as shown in FIGS. 1 and 2, and the measuring device 27 feeds and winds the measuring band 29a and the measuring band 29a. It is a tape measure type measuring means composed of a take-up shaft 29b which can be taken freely. The measuring device 27 is provided in such a manner that it is fixed to the side of the side surface 10a of the casing 10 on the lateral side of the camera holder 10b (on the right side of the drawing in FIG. 1 and on the left side of the drawing in FIG. 2). Tip 2
9c is connected to a side portion of the camera 22 (a side portion on the right side of the drawing in FIG. 1, and a side portion on the left side of the drawing in FIG. 2). That is, by moving the camera 22 in the direction away from the winding shaft 29b (for example, the direction of arrow A in FIGS. 1 and 2), the measuring band 29a is fed out from the winding shaft 29b, and the camera 22 is wound again. The measurement band 29a is wound around the winding shaft 29b by moving the measuring band 29a in the direction of approaching the winding shaft 29b (for example, the direction of arrow B in FIGS. 1 and 2). In addition, the winding shaft 29b has the winding shaft 2
A predetermined rotation angle meter 30 for detecting the rotation angle of 9b, and the length of the measurement band 29a drawn based on the rotation angle detected by the rotation angle meter 30, that is, the distance L1 between the camera 22 and the casing 10. (Note that the feeding length of the measurement band 29a when the camera 22 is mounted on the camera holder 10b is set to zero, so that between the camera 22 and the casing 10 when the camera 22 is mounted on the camera holder 10b. The moving distance calculating means 31 for calculating the distance L1 of 0) is provided. The moving distance calculating means 31 of the measuring device 27 is connected to the measuring device controller 21 of the control unit 11 described above via an electric cable or the like, as shown in FIG.

Since the surveying site 1 and the photogrammetric camera unit 6 are configured as described above, for example, the photometric camera unit 6 is used to perform surveying for obtaining the surface area of the slope 3 of the surveying site 1. And the following (however, this survey does not require much precision). That is, first, the camera unit 6 for photogrammetry is shown in FIG.
And as shown in FIG. 4, it installs on the ground 5. In this installation, the lens portion 22a of the camera 22 mounted on the camera holder 10b of the casing 10 faces the slope 3 direction,
Therefore, the lens portion 22a captures the image of the slope 3, adjusts the direction of the casing 10, etc., and installs the tripod 7 at an appropriate position on the ground 5 (note that the tripod 7 is grounded). The part 7a has anchor means 7b as described above.
It may be fixed to the ground 5 by. ). The position of the tripod 7 and the casing 10 installed by the above installation is set as the installation position SP, and the camera 22 mounted on the camera holder 10b of the casing 10 installed at the installation position SP.
The position of is designated as the photographing position KP1.

By installing the camera unit 6 for photogrammetry, a worker (not shown) looks at the image display portion 26a of the viewfinder 26 of the camera 22 while the lens portion 22a of the camera 22 is capturing the image of the slope 3. While confirming this, the shutter operating section 25 of the camera 22 is operated to cause the image creating section 23 to create an image captured by the lens section 22a as a photographic image SG1 which is digital information (note that in this embodiment. Then, as shown in FIGS. 1 and 2, when the camera 22 is mounted on the camera holder 10b, the finder 26 of the camera 22 is difficult to see because the casing 10 of the analysis device 9 interferes. When the camera 22 is mounted on the camera holder 10b, the image on the image display section 26a of the finder 26 is controlled by the control unit. Transmitted to Tsu DOO 11 side, the first or second display 19b of the display section 19 the image may be displayed at 19c.). The photographic image SG1 created by the image creating unit 23 is transmitted to the camera control unit 20, and the main control unit 1 is transmitted from the camera control unit 20 via the bus line 12a.
2 is transmitted to the memory unit 16 from the main control unit 12 and stored therein.

Next, the worker (not shown) removes the camera 22 from the camera holder 10b, holds the camera 22 and moves away from the installation position SP of the casing 10 (for example, the direction of arrow A in FIGS. 1 and 2). Move to. As the camera 22 moves, the measurement band 29a is fed out from the winding shaft 29b, and therefore the measurement band 29a is located at the present position where the camera 22 has been moved and the installation position SP (that is, the photographing operation). The winding length of the winding shaft 29b corresponds to the distance L1 from the position KP1). By the way, in the measuring device 27, the rotation angle meter 30 detects the rotation angle of the winding shaft 29b at every predetermined time, and the rotation angle detected at every predetermined time is transmitted to the movement distance calculation means 31 each time. ing. In addition, the moving distance calculation means 31
Then, based on each transmitted rotation angle, the distance L1 between the camera 22 and the casing 10, that is, the arrangement position HP of the camera 22 and the installation position SP (the photographing position KP1).
The distance L1 between the
1 is transmitted to the measuring device control unit 21. Further, each distance L1 (that is, the distance L1 calculated at every predetermined time) is transmitted from the measuring device control unit 21 to the camera control unit 20 via the main control unit 12 in each case, and the camera control unit 20.
Transmits the transmitted distances L1 to the numerical value display section 26b of the finder 26 each time. That is, finder 2
As shown in FIG. 5, the numerical value display section 26b of No. 6 displays the distance L1 transmitted every predetermined time, which is updated every predetermined time. Therefore, the worker (not shown) moves while holding the camera 22 and looks into the viewfinder 26 of the camera 22 to find the distance L of the camera 22 displayed on the numerical display portion 26b of the viewfinder 26.
Check 1.

The worker (not shown) further moves by holding the camera 22 and further confirms the distance L1 displayed on the numerical display section 26b, whereby the numerical display section 2 is displayed.
It stops at the position where the distance L1 displayed in 6b has a value of a predetermined appropriate interval TK. In photogrammetry, by setting the interval between two shooting positions for performing stereo shooting to a predetermined size calculated by the distance between these two shooting positions and the subject, that is, an appropriate interval, It is known that analytical detection of the three-dimensional shape of the subject can be performed as accurately as possible. That is,
The value of the appropriate interval TK is the distance between the photographing position KP1 where the photographic image SG1 was photographed and the slope 3 that is the subject (measured roughly by visual observation), and the camera 22 is currently moved. It is a value calculated by the distance from the arrangement position HP (that is, a position that is a candidate for the photographing position) to the slope 3 (this is also roughly measured by visual measurement or the like). The worker (not shown) uses the distance L1 as a predetermined appropriate distance TK.
The operator stops at the position where the value of the value becomes, and the worker looks at the image displayed on the image display section 26a of the finder 26, so that the lens section 22a is oriented in a direction to capture the slope 3 to be measured. (Note that the operation of looking at the distance L1 displayed on the numerical value display unit 26b and the operation of looking at the image displayed on the image display unit 26a can be performed simultaneously by one operation of looking into the finder 26. .). That is, the arrangement position HP of the camera 22 with the lens portion 22a capturing the slope 3 to be measured is determined as the photographing position KP2 different from the photographing position KP1. That is, the shooting position KP2 is the shooting position K
This is the position where the distance L1 from P1 is the appropriate distance TK. After that, the worker (not shown) operates the shutter operating unit 25 of the camera 22 to cause the image creating unit 23 to create the image captured by the lens unit 22a as a photographic image SG2 which is digital information. The distance L1 displayed on the numerical value display section 26b when the photographic image SG2 created by the image creating section 23 and the shutter operating section 25 is operated is
It is transmitted to the camera control unit 20, and is transmitted from the camera control unit 20 via the main control unit 12 to the memory unit 16 and stored therein.

Next, the control unit 11 performs a predetermined photogrammetric analysis work. That is, the photographic images SG1 and SG2 stored in the memory unit 16 are displayed by the display control unit 19 of the display unit 19 by the display command input via the input unit 13.
a, and the display control unit 19a, as shown in FIG.
These photographic images SG1 and SG2 are displayed as visible plane images on the first display 19b and the second display 19c, respectively. In addition, the photograph images SG1 and SG2 and the distance L1 stored in the memory unit 16 are calculated by the calculation unit 17
The photo image SG is transmitted to the calculation unit 17 first.
A known mutual orientation calculation is performed between 1 and SG2. By the way, with the execution of the mutual orientation calculation, an operator (not shown) displays an image of the same point on the slope 3 as the subject between the photographic images SG1 and SG2 displayed on the first display 19b and the second display 19c. It can be clearly determined that there is 5
Photo images SG1 and SG of a pair of pass points (not shown)
The position on 2 is designated and input by a cursor or the like (not shown) on the first display 19b and the second display 19c, and the five sets of photograph images SG1 and SG2 of the input pass points are input.
The upper position is transmitted to the calculation unit 17. Therefore, the calculation unit 1
In 7, the photographic images SG1 of these 5 sets of pass points,
Based on the position on SG2, the relative positional relationship between the camera coordinates (camera coordinates are coordinates unique to the camera 22 and correspond to the shooting direction) when the photographic images SG1 and SG2 are taken, respectively. Calculate By calculating the relative positional relationship between the camera coordinates, the model MD for the slope 3 is formed (however, the scale of the model MD or the relationship between the model MD and the ground coordinates has not been determined. is there.).

Next, the arithmetic unit 17 transmits the transmitted distance L
The relative positional relationship between the camera coordinates is determined based on 1 (that is, the distance L1 is the distance between the two shooting positions KP1 and KP2, and thus the distance between the two camera coordinates). By determining the relative positional relationship of each camera coordinate,
The scale of the model MD was determined. Here, the calculation unit 1
At 7, one of the two camera coordinates is set as a temporary fixed coordinate, and the model MD is set on the temporary fixed coordinate. As a result, in the calculation unit 17,
It is an image of the same point on the slope 3 that is the subject,
If the positions of the set of points in the photographic images SG1 and SG2 on the photographic images SG1 and SG2 (that is, the positions on the two camera coordinates) are clarified, on the model MD corresponding to the set of points. A conversion formula H1 for calculating the position of the point on the camera coordinate set as the temporary fixed coordinate is calculated and held.

Next, in the calculation section 17, the photographic image SG1,
A well-known matching work is performed between SG2. (Before performing the matching work, even if a deviation correction work is performed to eliminate the vertical parallax between the photographic images SG1 and SG2 for convenience of the matching work. Good), photographic images SG1 and S, which are images at the same point on the slope 3 that is the subject.
The positions of the set of points in G2 on these photographic images SG1, SG2 are calculated for a plurality of sets of points. Next, the three-dimensional position SI on the camera coordinate set as the temporary fixed coordinate of the point on the model MD to which the plurality of point sets correspond is calculated by the plurality of point sets and the conversion formula H1. Calculate each. That is, the plurality of three-dimensional positions SI
Shows the actual three-dimensional shape of the slope 3 although its relationship with the absolute coordinates on the ground is unknown. Next, in the calculation unit 17, the surface area HM of the slope 3 is calculated by the three-dimensional shape of the slope 3 represented by the plurality of three-dimensional positions SI.
Is calculated and transmitted to the memory unit 16 for storage. This completes the prescribed photogrammetric analysis work.

After that, the worker (not shown) operates the input unit 1.
An output command is input according to 3, and the main control unit 12 transmits the surface area HM stored in the memory unit 16 to the output unit 15 and outputs it according to the command. The output unit 15 has the surface area HM
The numerical value of is output to the outside by an appropriate method such as print output or display output. With the above, the survey for obtaining the surface area of the slope 3 was completed.

In the above-mentioned embodiment, the known ground orientation calculation is omitted after the mutual orientation calculation. But,
Calculation unit 17 of camera unit 6 for photogrammetry according to the present invention
May have the function of ground orientation calculation. However, when the ground orientation calculation is performed, it is necessary to previously set three or more reference points on the slope 3 in which the latitude, longitude, altitude, etc. are known. Although a method other than the one described above can be considered in the photogrammetric analysis method, the control unit 11 of the photogrammetric camera unit 6 according to the present invention may perform the analysis calculation by an analysis method other than the above. Of course good things.

Further, in the above-described embodiment, the measuring device 27 which is the measuring means has the measuring band 29a and the winding shaft 29b which can wind / unwind the measuring band 29a, and the tip 29c of the measuring band 29a is provided. The take-up shaft 29b is connected to the casing 22 which is the installation main body of the camera 22.
The tip end 29c of the measurement band 29a may be connected to the casing 10 and the winding shaft 29b may be connected to the camera 22.

Further, in each of the above-mentioned embodiments, the measuring device 27, which is the measuring means, includes the measuring band 29a and the measuring band 2a.
9a has a winding shaft 29b that can freely wind and unwind the measuring band 2
One of the tip 29c of 9a and the take-up shaft 29b is connected to the camera 22 and the other is connected to the casing 10 or the like which is the installation main body. The measuring means, as shown in FIG. The ultrasonic measure 42 may include the ultrasonic wave measuring unit 40 and the ultrasonic wave reflecting unit 41. That is, the ultrasonic transmitter / receiver 40 of the ultrasonic measure 42 is installed in the casing 10 which is the main body.
The ultrasonic wave reflection unit 41 is installed in the camera 22 (or, the ultrasonic wave transmission / reception unit 40 may be installed in the camera 22 and the ultrasonic wave reflection unit 41 may be installed in the casing 10 as the installation body).

Further, in the above-described embodiment, the measuring device 27
Alternatively, the distance L detected by the ultrasonic measure 42
Intervals such as 1 are displayed on the numerical display section 26b in the finder 26. However, a scale is provided on the measuring band 29a of the measuring device 27, and the distance L1 which is the feeding length of the measuring band 29a is detected by reading the scale of the measuring band 29a on the winding shaft 29b side. May be. In addition, the ultrasonic wave transmitting / receiving unit 4 of the ultrasonic wave measure 42.
You may provide the display part which displays the detected distance L1 in 0 itself.

Further, in the above-described embodiment, the photographing position KP1 of the two photographing positions KP1 and KP2 is the arrangement position of the camera 22 mounted on the camera holder 10b of the casing 10. However, the photographing position KP1 , KP2
May be the arrangement position of the camera 22 removed from the camera holder 10b. In this case, the distance between the two shooting positions KP1 and KP2 is determined by comparing the distance between the shooting position KP1 and the installation position SP of the casing 10 and the distance between the shooting position KP2 and the installation position SP. Required (for example, assuming that the shooting positions KP1, KP2 and the installation position SP are on a straight line, the shooting position K
The distance between P1 and KP2 is determined by the shooting position KP1 and the installation position S.
P, the shooting position KP2 and the installation position SP
It is determined by the difference in the distance between and. ).

[0023]

As described above, the first invention of the present invention has an installation body such as a tripod 7 and a casing 10 which can be installed on the ground such as the ground 5, and is movable with respect to the installation body. A camera such as a camera 22 is provided in a free form, and two measurement ends such as a winding shaft 29b, a tip 29c, an ultrasonic wave transmitting / receiving unit 40, and an ultrasonic wave reflecting unit 41, which can relatively approach and retract, are provided.
A measuring device 27 and an ultrasonic measure, which are installed in the installation body and the camera, respectively, and capable of detecting an interval such as a distance L1 between the installation body in which these two measurement ends are installed and the camera. Since the measuring unit such as 42 is provided, the camera unit for photogrammetry according to the present invention is applied to the photogrammetry work performed by detecting the interval between two photographing positions to be stereo-photographed in photogrammetry. ,
In the photogrammetry work, the installation main body is installed on the ground, the cameras are sequentially arranged at two photographing positions having different positional relations with respect to the installation main body, and the object is sequentially photographed by the camera at each of these photographing positions. To be done. Further, when the camera is arranged at each shooting position, the distance between the camera and the installation body, that is, the interval between the shooting position of the camera and the installation position of the installation body is detected by the measuring means. The interval between the two image capturing positions will be detected. That is, the detection of the interval between the two shooting positions can be detected by sequentially arranging the cameras at the two shooting positions, and an independent work separate from the shooting work is not performed as much as possible. It is convenient that it can be performed without complicating the work process in the entire photogrammetry work.

A second aspect of the present invention is the first aspect of the invention, further comprising a numerical value display section 26b or the like capable of displaying an interval detected by the measuring means on the camera side of the measuring means or on the camera. Since the interval display unit is provided, in addition to the effect of the first invention, an operator or the like who moves with the camera in order to arrange the camera at the photographing position can display the interval display at the position of the camera. Since the unit can know the interval detected by the measuring means, whether the current position moved with the camera is suitable as the shooting position where the camera should be placed, that is, the current position is set as the shooting position. When it is decided, whether or not the distance between the photographing position and another photographing position is a predetermined appropriate distance can be immediately judged on the spot, which saves the labor and time of the photogrammetry work. It is convenient been.

The third aspect of the present invention is, in addition to the effect of the second aspect, in the second aspect, the interval display section is provided in a viewfinder such as the viewfinder 26 of the camera. , Looking through the viewfinder to see the image in the viewfinder, determine whether the camera is capturing an appropriate image, and look into the viewfinder to see the interval display in the viewfinder and move with the camera Since it is possible to determine whether or not the current position is suitable as a shooting position for arranging the camera by one operation of looking into the viewfinder, it is convenient because the labor of photogrammetry work is saved.

A fourth aspect of the present invention is based on the first aspect, wherein the measuring means includes a measuring band such as a measuring band 29a and a winding shaft 29b capable of winding and unwinding the measuring band. Since the camera has a take-up portion and one of the tip portion of the measurement band such as the tip 29c and the take-up portion is connected to the camera and the other is connected to the installation main body, the camera is placed at the photographing position. In order to allow the worker to move the camera while holding the camera, the measuring band of the measuring means provided between the camera and the installation main body corresponds to the distance between the camera and the installation main body. The measuring means is installed and wound around the winding part, and thus the measuring means is installed in a state in which the distance between the camera and the installation body can be detected. That is, in addition to the effect of the first invention, the operation of moving the camera to place it at the shooting position and the operation of installing the measuring means for detecting the distance between the camera and the installation body are one. Since it is realized by operation, it is convenient because the labor of photogrammetry work is saved.

A fifth aspect of the present invention is based on the first aspect, wherein the measuring means is an ultrasonic wave transmitting / receiving section such as the ultrasonic wave transmitting / receiving section 40 and an ultrasonic wave reflecting section such as the ultrasonic wave reflecting section 41. An ultrasonic distance measuring unit such as an ultrasonic measure 42, wherein the ultrasonic wave transmitting / receiving unit and the ultrasonic wave reflecting unit are
Since there are two measurement end portions, in order to position the camera at the photographing position, an operator or the like moves the camera with respect to the installation main body, so that in the ultrasonic distance measuring means, The distance between the camera and the ultrasonic wave reflecting portion is set corresponding to the distance between the camera and the installation body. That is,
In addition to the effect of the first aspect of the invention, an ultrasonic wave transmitting / receiving unit in an ultrasonic distance measuring means for detecting the distance between the camera and the installation body, the operation of moving the camera to position it at the photographing position. Since the operation of setting the distance between the ultrasonic wave reflection section and the ultrasonic wave reflection section is realized by one operation, the labor of photogrammetry work is saved, which is convenient. Further, in the ultrasonic distance measuring means, it is sufficient that the ultrasonic wave transmitting / receiving unit and the ultrasonic wave reflecting unit, that is, the camera and the installation main body are connected by a predetermined ultrasonic wave, and therefore, the camera and the installation main body. Since there is no need for an object for connecting to and from, the degree of freedom of the camera when moving the camera with respect to the installation main body is increased, and thus, the photogrammetric work is performed more smoothly, which is advantageous.

A sixth aspect of the present invention is the same as the first aspect of the present invention, in which the installation main body or the camera detects the photographic images such as the photographic images SG1 and SG2 taken by the camera and the measuring means. In addition to the effect according to the first aspect of the present invention, the measurement unit detects the photographic image based on the predetermined interval because the analysis unit such as the control unit 11 that can perform the survey analysis calculation is provided. By performing the survey analysis calculation on the photographed photographic image based on the interval between the two shooting positions derived from the determined interval, the survey analysis calculation can be performed as a simplified survey analysis operation. Since the surveying / analyzing operation is performed in the analyzing / calculating section provided in the installation main body or the camera, the surveying result which is the result of the surveying / analyzing operation. It is required immediately in surveying the field. That is, it is convenient because the survey results can be obtained easily and immediately.

A seventh aspect of the present invention is the first aspect of the invention, wherein the installation main body comprises a tripod such as a tripod 7 which can be freely installed on the ground. The worker may place the camera at the shooting position so that the camera moves with respect to the independent tripod and shoot. That is, in addition to the effect of the first invention, the photogrammetry work can be performed by one worker, which is convenient because manpower can be omitted.

The eighth invention of the present invention is the seventh invention, wherein the grounding portion such as the grounding portion 7a of the tripod is fixed to the ground through anchor means such as anchor means 7b. Therefore, the self-supporting tripod is not subject to wind, vibration, or other force (for example, tension caused by a measuring band or the like generated between the tripod and the camera when the camera is moved with respect to the tripod). ) Is prevented as much as possible from falling or sliding on the ground. Therefore, in addition to the effect of the seventh invention, the photogrammetric work can be safely performed.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a camera unit for photogrammetry according to the present invention.

FIG. 2 is a plan view of the camera unit for photogrammetry shown in FIG.

FIG. 3 is a block diagram of the photogrammetry camera unit shown in FIG. 1.

FIG. 4 is a plan view showing a survey site.

5 is a diagram showing the inside of a finder of the camera unit for photogrammetry shown in FIG. 1. FIG.

FIG. 6 is a front view showing another example of the camera unit for photogrammetry according to the present invention.

[Explanation of symbols]

 5 ...... Ground 6 ...... Camera unit for photogrammetry 7 ...... Installation body, tripod (tripod) 7a ...... Grounding part 7b ...... Anchor means 10 ...... Installation body (casing) 11 ...... Analysis calculation part (control unit) 22 ... Camera 26 ... Finder 26b ... Interval display part (numerical value display part) 27 ... Measuring means (measuring device) 29a ... Measuring band 29b ... Measuring end part, winding part (winding shaft) 29c ... … Measurement end, tip (tip) 40 …… Measurement end, ultrasonic wave transmitter / receiver (ultrasonic wave transmitter / receiver) 41 …… Measurement end, ultrasonic wave reflector (ultrasonic wave reflector) 42 …… Super Sound wave distance measuring means (ultrasonic wave measure) L1 ... Interval (distance) SG1 ... Photo image SG2 ... Photo image

Claims (8)

[Claims] 1. An installation main body having an installation main body that can be installed on the ground, and a camera provided so as to be movable with respect to the installation main body. A camera unit for photogrammetry, which is installed in the camera and the camera, and is provided with a measuring unit capable of detecting a distance between the camera and the installation body in which these two measuring ends are installed. 2. The camera unit for photogrammetry according to claim 1, wherein the camera side of the measuring means or the camera is provided with an interval display section capable of displaying an interval detected by the measuring means. 3. The camera unit for photogrammetry according to claim 2, wherein the interval display section is provided in a viewfinder of the camera. 4. The measuring means has a measuring band and a winding unit capable of winding / unwinding the measuring band, and one of the tip end of the measuring band and the winding unit is provided in the camera. The camera unit for photogrammetry according to claim 1, wherein the other is connected to the installation main body. 5. The measuring means is an ultrasonic distance measuring means composed of an ultrasonic wave emitting / receiving section and an ultrasonic wave reflecting section, and the ultrasonic wave emitting / receiving section and the ultrasonic wave reflecting section have the two measuring end portions. The camera unit for photogrammetry according to claim 1. 6. An analysis operation capable of performing a survey analysis operation on the photographed photographic image on the installation main body or the camera based on a photographic image photographed by the camera and an interval detected by the measuring means. The camera unit for photogrammetry according to claim 1, wherein the camera unit is provided with a section. 7. The camera unit for photogrammetry according to claim 1, wherein the installation body is a tripod that can be installed on the ground. 8. The camera unit for photogrammetry according to claim 7, wherein the grounding portion of the tripod is fixed to the ground through anchor means.