JP3965597B2 - Data communication mechanism of surveying instrument - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data communication mechanism of a surveying instrument, and more particularly to a data communication mechanism of a surveying instrument provided with an emission optical unit for diffusing laser light in a stepwise spread.
[0002]
[Prior art]
For example, in surveying work to obtain a reference point, the position of the reference point is specified by measuring the direction angle and distance of the reflecting prism placed on the point finding side with a surveying instrument installed on the known point side. Can do.
[0003]
The surveyor-side worker measures the position of the reflecting prism and instructs the worker who has the pole with the reflecting prism to place the pole on the point. When the position of the sought point coincides with the measured value, the position of the sought point is obtained. The surveying work can be performed by repeating this work.
[0004]
There is a conventional method of signaling by hand to the worker holding the pole from the surveying instrument side, but recently there is a method of sending survey data directly to the pole side.
[0005]
Here, as shown in FIG. 6, a method using radio will be described.
[0006]
The surveying instrument (1000) includes a telescope unit (1200) and a wireless communication device (1300). The pole (4000) on the measurement point side is connected to the reflector (5000), the data collector (2000) capable of displaying survey data, and the survey data (2000) connected to the data collector (2000) to receive survey data from the survey instrument (1000). Receiver (13B).
[0007]
The position of the pole (4000) measured by the surveying instrument (1000) is transmitted as surveying data to the receiver (13B) via the wireless communication device (1300). The transmitted survey data is displayed on the display of the data collector (2000). In this data collector (2000), the position information of the obtained points is stored and can be referred to. When the position of the sought point does not match, the worker having the pole (4000) moves with the pole (4000) in the direction in which the position of the sought point matches.
[0008]
There is also a method using light as a method different from wireless. This is a method of modulating and transmitting surveying data by modulating a light wave of light wave ranging to measure a prism. In this case, a light receiver is used instead of the wireless communication device, and a circuit for modulating the light wave according to the data is required instead of the wireless transmitter.
[0009]
[Problems to be solved by the invention]
In the case of a wireless communication device, the frequency band that can be used varies from country to country. It is difficult to prepare wireless communication device specifications for each country. In addition, in the case of a land continuation like Europe, there was a problem that it was very inconvenient, differing from country to country.
[0010]
When using a light wave, the light wave of the surveying instrument is a nearly parallel light beam to extend the reach. For this reason, for example, when an operator on the pole (4000) side moves, the worker immediately deviates from the light wave range. If it is off, there is a problem that data cannot be received.
[0011]
When the light wave emission angle is widened so as not to deviate from the light wave range, the reachable distance is extremely short. Further, when a mechanism capable of mechanically adjusting this is incorporated, there is a serious problem that the distance measuring device itself becomes complicated.
[0012]
[Means for Solving the Problems]
The present invention has been devised in view of the above problems, and is a data communication mechanism used for a surveying instrument capable of transmitting data to a receiving device placed at a measurement target point. A data communication unit for converting data into a data signal, a laser light emitting unit for emitting transmission light based on the data signal of the data communication unit, and a laser beam for diffusing the laser light from the laser light emitting unit The emission optical unit includes at least a collimating lens for making the laser light from the laser light emitting unit a parallel light, and a first for slightly spreading and diffusing the parallel light. And a second diffusing member for diffusing a part of the light diffused by the first diffusing member more widely.
[0013]
Further, in order to further diffuse the laser light of the present invention from the central portion, the second diffusing member may be formed on the outer peripheral portion of the first diffusing member.
[0014]
Furthermore, the first diffusing member of the present invention can also be composed of a phase plate for transmitting and diffusing laser light.
[0015]
The second diffusing member of the present invention can also be constituted by a hologram member for transmitting and diffusing at a predetermined spread angle.
[0016]
The second diffusing member of the present invention may be placed behind the first diffusing member to further diffuse the outer peripheral portion of the laser light diffused by the first diffusing member.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
The present invention has been devised in view of the above-described problems. A data communication unit converts survey data into a data signal, and a laser light emitting unit emits transmission light based on the data signal of the data communication unit. The part diffuses the laser light from the laser light emitting part, the collimating lens makes the laser light from the laser light emitting part parallel light, and the first diffusing member slightly spreads the parallel light and diffuses it. Thus, the second diffusing member diffuses a part of the light diffused by the first diffusing member more widely.
[0018]
The second diffusion member of the present invention is formed on the outer periphery of the first diffusion member, and the laser light is further diffused from the central portion.
[0019]
Further, the first diffusion member of the present invention can be a phase plate for transmitting and diffusing laser light.
[0020]
The second diffusing member of the present invention can be a hologram member for transmitting and diffusing at a predetermined spread angle.
[0021]
Further, the second diffusing member of the present invention can be further diffused by placing the laser beam diffused by the first diffusing member by placing it behind the first diffusing member.
[0022]
【Example】
[0023]
Embodiments of the present invention will be described below with reference to the drawings.
[0024]
FIG. 2 shows the main part of the surveying instrument main body. The surveying instrument 10000 includes a leveling unit 9100 attached to a tripod, a base part 9200 provided in the leveling part 9100, and a rack provided so as to be rotatable about a vertical axis with respect to the base part 9200. The telescope unit 9400 is configured to be rotatable about a horizontal axis with respect to the frame unit 9300.
[0025]
The telescope unit 9400 collimates the measurement target with the telescope and irradiates the distance measuring light from the objective lens 9600. Then, the angle detection of the measurement object and the distance to the reflecting prism are measured.
[0026]
The data transmission unit 1100 is provided independently at a position different from the objective lens 9600 of the telescope unit 9400 for collimation and measurement.
[0027]
Next, the configuration of the present embodiment will be described with reference to FIG.
[0028]
The surveying instrument 10000 of this embodiment is used together with the prism pole 5000. The prism pole 5000 side includes a data collector 2000 and a prism 4000.
[0029]
Next, the electrical configuration of the present embodiment will be described with reference to FIG.
[0030]
The surveying instrument 10000 includes a main body 1000 and a data collector 2000, and the main body 1000 and the data collector 2000 correspond to the data communication mechanism of the surveying instrument 10000.
[0031]
The main body 1000 includes a data transmission unit 1100, a distance measuring unit 1200, a light emitting unit 1300, a light receiving unit 1400, a vertical angle measuring unit 1500, a horizontal angle measuring unit 1600,
The storage unit 1700 includes an operation / input unit 1810, a display unit 1820, and a control calculation unit 1900.
[0032]
The data collector 2000 includes a data receiving unit 2100, a data collector storage unit 2200, a data collector display unit 2300, and a data collector control calculation unit 2400.
[0033]
The data transmission unit 1100 of the main body unit 1000 includes a data communication unit 1110 and a laser diode (LD) light emitting unit 1120, and the data communication unit 1110 receives a laser diode (in response to a control signal from the control calculation unit 1900. LD) light emitting unit 1120 is configured to be driven.
[0034]
The distance measuring unit 1200 can drive the light emitting unit 1300 to emit distance measuring light 3000 toward the reflecting prism 4000. The distance measuring light 3000 reflected by the reflecting prism 4000 is received by the light receiving unit 1400, and the distance measuring unit 1200 measures the distance to the reflecting prism 4000 based on the received light signal.
[0035]
The control calculation unit 1900 receives data from the vertical angle measurement unit 1500, the horizontal angle measurement unit 1600, and the distance measurement unit 1200, and calculates the distance to the reflection prism 4000, the direction, the elevation angle, and the like. The calculated survey result data or the operation status of the main unit 1000 is displayed on the display unit 1820.
[0036]
A storage unit 1700 and an operation / input unit 1810 are connected to the control calculation unit 1900. The storage unit 1700 can store programs necessary for calculation, calculation results, survey results, and the like. The input unit 1810 can operate the main body unit 1000.
[0037]
The survey data or survey data temporarily stored in the storage unit 1700 is sent to the data communication unit 1110 for converting the survey data into a data signal. The data communication unit 1110 drives the LD light emitting unit 1120 to emit transmission light corresponding to the data signal toward the data receiving unit 2100 of the data collector 2000 on the prism pole 5000 side.
[0038]
The data receiving unit 2100 includes an LD light receiving unit 2110 that receives transmission light transmitted from the data transmitting unit 1100, and a receiving circuit 2120 that converts a data signal from the LD light receiving unit 2110 into survey data.
[0039]
The survey data of the receiving circuit 2120 is sent to the data collector control calculation unit 2400. In the data collector control calculation unit 2400, the survey data is displayed on the data collector display unit 2300 and stored in the data collector storage unit 2200.
[0040]
The data collector control calculation unit 2400 can also display the information on the points stored in the data collector storage unit 2200 on the data collector display unit 2300 or the like so that it can be compared with the survey data. Further, information obtained by comparing the point finding information with the surveying data or the like can be stored in the data collector storage unit 2200, or information can be provided to the worker.
[0041]
Here, the optical system of the data transmission unit 1100 will be described with reference to FIG. In this embodiment, the optical system of the data transmission unit 1100 is provided independently at a position different from the objective lens 9600 of the telescope unit 9400.
[0042]
The emission optical unit of the data transmission unit 1100 includes a laser light source 1221 of the laser (LD) light emitting unit 1220, a collimator lens 1222, a first diffusion member 1223, and a second diffusion member 1224, and transmits laser light. , For spreading in a stepwise manner.
[0043]
The collimator lens 1222 is for making the laser light from the laser (LD) light emitting unit 1220 into parallel light.
[0044]
The first diffusing member 1223 is for slightly spreading and diffusing the light that has been collimated by the collimator lens 1222. The second diffusing member 1224 is used to transmit and diffuse more widely than the first diffusing member 1223.
[0045]
Since the second diffusing member 1224 is placed behind the first diffusing member 1223, the outer periphery of the laser light diffused by the first diffusing member 1223 is further diffused by the second diffusing member 1224. be able to.
[0046]
In this embodiment, the first diffusion member 1223 is composed of a phase plate and has a diffusion angle of 7 degrees. The first diffusion member 1223 is not limited to the phase plate, and the diffusion angle is not limited to 7 degrees.
[0047]
In the present embodiment, the second diffusion member 1224 is composed of a hologram member and has a diffusion angle of 40 degrees. The second diffusion member 1224 is not limited to the hologram member, and the diffusion angle is not limited to 40 degrees.
[0048]
Further, the second diffusion member 1224 may be formed on the outer peripheral portion of the first diffusion member 1223 in order to diffuse the laser light in a stepwise manner from the central portion.
[0049]
As shown in FIG. 4, for example, a laser beam having a diffusion angle of 7 degrees by the first diffusion member 1223 has a reach distance of about 300 m, and a laser beam having a diffusion angle of 40 degrees by the second diffusion member 1224. The reaching distance of light is about 60 m.
[0050]
【effect】
According to the present invention configured as described above, the data transmission unit includes a data communication unit for converting survey data into a data signal, and a laser for emitting transmission light based on the data signal of the data communication unit. The light emitting part and an emission optical part for diffusing the laser light from the laser light emitting part, and at least the laser light from the laser light emitting part is made parallel to the emission optical part A collimating lens, a first diffusing member for slightly spreading and diffusing the parallel light, and a second diffusing member for diffusing a part of the light diffused by the first diffusing member more widely. Therefore, even if the emission angle of the laser beam for data communication is widened, there is an excellent effect that the reduction of the reach distance can be prevented.
[0051]
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an electrical configuration of a surveying instrument 10000 according to the present embodiment.
FIG. 2 is a diagram illustrating a surveying instrument 10000 according to the present embodiment.
FIG. 3 is a diagram illustrating an emission optical unit according to the present embodiment.
FIG. 4 is a diagram illustrating an emission optical unit according to the present embodiment.
FIG. 5 is a diagram illustrating a surveying instrument 10000 according to the present embodiment.
FIG. 6 is a diagram illustrating a conventional technique.
[Explanation of symbols]
10,000 surveying instrument 3000 ranging light 4000 prism 5000 prism pole 1000 main body 1100 data transmission unit 1110 data communication unit 1120 laser diode (LD) light emitting unit 1200 ranging unit 1221 laser light source 1222 collimating lens 1223 first diffusing member 1224 second Diffusing member 1300 light emitting unit 1400 light receiving unit 1500 vertical angle measuring unit 1600 horizontal angle measuring unit 1700 storage unit 1810 operation / input unit 1820 display unit 1900 control arithmetic unit 2000 data collector 2100 data receiving unit 2200 data collector storage unit 2300 data Collector display unit 2400 Data collector control calculation unit

Claims (5)

A data communication mechanism used for a surveying instrument capable of transmitting data to a receiving device placed at a measurement target point, the data transmission unit includes a data communication unit for converting survey data into a data signal, Based on the data signal of the data communication unit, it is composed of a laser light emitting unit for emitting transmission light and an emission optical unit for diffusing the laser light from the laser light emitting unit. at least, a collimating lens for parallel light laser beam from the laser emitting portion, and a first diffusion member for diffusing spreading the parallel light slightly, spread by first spreading member A data communication mechanism of a surveying instrument having a second diffusing member for diffusing a part of the light more widely. The data communication mechanism for a surveying instrument according to claim 1, wherein the second diffusing member is formed on the outer peripheral portion of the first diffusing member so that the laser light from the laser light emitting portion is further diffused from the central portion.   The data communication mechanism of a surveying instrument according to claim 1, wherein the first diffusion member is composed of a phase plate for transmitting and diffusing laser light.   The data communication mechanism for a surveying instrument according to claim 1, wherein the second diffusing member comprises a hologram member for transmitting and diffusing at a predetermined spread angle.   The data communication mechanism for a surveying instrument according to claim 2, wherein the second diffusing member is placed behind the first diffusing member and further diffuses the outer peripheral portion of the laser light diffused by the first diffusing member.

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