JP3208202B2 - Kinematic survey controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device used for kinematic surveying.

[0002]

2. Description of the Related Art A survey using a GPS system is known. In this type of survey, radio waves transmitted from a plurality of (four or more) satellites are received by a plurality of GPS receivers at the same time. By calculating the phase difference of the radio waves received between the GPS receivers, the distance and direction between points on the earth are measured. In surveying using such a GPS system, there is a method called kinematic surveying in which one GPS receiver is fixedly installed at a known point, and a portable second GPS receiver is sequentially moved to a measuring point to perform measurement. .

[0003] In such kinematic surveying, in order to improve the efficiency of surveying, it is usually configured to be operated by a single measurer, and a receiver and a control device which sequentially move to a measuring point are provided separately. It shall be portable, and the measurer shall
Carry the GPS receiver and operate the control device at hand,
The measurement was performed while performing data communication between the control device and the GPS receiver.

In such a kinematic survey, when the measurement at one measurement point is completed, the measurer moves to the next measurement point. In this case, the radio wave from the satellite is transmitted even during the movement. It is an essential requirement that the reception is continued, and if it is determined that the reception has been interrupted, the measurement returns to the previous measurement point and the measurement is performed again. By the way, such a control device for kinematic surveying is
Conventionally, only functions necessary for operating the GPS receiver, or in addition to this, information held by the GPS receiver, such as the longitude, latitude, height of the antenna position, and the satellite being received Has a function of displaying information representing the current position of the vehicle as an azimuth angle and an altitude angle. However, such a control device has a technical problem described below.

[0005]

In kinematic surveying, as described above, interruption of reception of radio waves when the GPS receiver is moved to the measuring point has a serious effect on the success or failure of the surveying. However, in the conventional control device, for example, when the measurer tries to move to another measurement point,
When there is a radio wave obstacle in the moving direction, it has been difficult to continue receiving radio waves while avoiding the obstacle.

That is, in such a situation, in the conventional control device, the current position of the satellite is displayed as numerical information, and the measurer recognizes the position of the satellite from this numerical value. In order to know the direction of the satellite in the direction that the person is currently facing, measure the bearing with a separately prepared compass, etc., and make an approximate estimate from the numerical value of the satellite's direction angle. did not become.

However, such a means for confirming a satellite is as follows.
In addition, it is troublesome, and since it travels roughly, it is highly likely that reception of radio waves will be interrupted in the middle of the travel, which is an obstacle to ensuring quick surveying. The present invention has been made in view of the above problems, and an object of the present invention is to make it possible for a measurer to reliably and easily recognize the position of a satellite in the current direction. It is an object of the present invention to provide a kinematic surveying control device capable of improving surveying efficiency.

[0008]

To achieve the above object, the present invention provides a first GPS receiver fixedly installed at a known point for receiving radio waves transmitted from a plurality of satellites, and a first GPS receiver transmitted from the satellite. A portable second GPS receiver that receives a radio wave at the same time as the first GPS receiver, wherein the second GPS receiver is sequentially moved to a plurality of measurement target points while sequentially moving the second GPS receiver to a plurality of measurement target points; A portable control device used for kinematic surveying for measuring a distance between the GPS receiver and the position and altitude information of the satellite from the GPS receiver, the name of the measurement target point in the GPS receiver A communication input / output unit for sending various information such as
An azimuth detecting unit for detecting the azimuth of the current position of the second GPS receiver; a key input unit for inputting the various information; a graphic display unit for displaying a celestial map at the current position of the second GPS receiver; It is connected to an input / output unit, a direction detector, a key input unit, and a graphic display unit, and displays the positions of the plurality of satellites on the celestial sphere based on the position and altitude information of the satellite from the communication input / output unit. And a data processing unit that controls the azimuth of the current position and the azimuth on the celestial sphere based on a measurement value of the azimuth detecting unit.

[0009]

According to the kinematic surveying control device having the above-mentioned structure, the data processing unit displays the satellite currently receiving the radio wave on the celestial map on the graphic display unit, and based on the measurement value of the azimuth detecting unit. Since the control is performed so that the azimuth of the current position and the azimuth on the celestial map match, the operator can see which direction the satellite is in with respect to the current direction by looking at this graphic display. Can be recognized.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 3 show an embodiment of a kinematic survey control device according to the present invention. FIG. 1 shows an outline of a kinematic survey in which the control device 10 of the present invention is used. In this type of survey, two GPS receivers are used and one of the first GPS is used.
The receiver 12 is fixedly installed at the known point A, and the other second G
The PS receiver 14 is portable, and sequentially moves from measurement points B ₀ to B _n near the known point A.

First and second GPS receivers 12 and 14
Are radio waves (GPS) transmitted from a plurality of satellites 16a to 16d.
Signal) at the same time. Each GPS receiver 12, 14
Are antennas 12a composed of microstrips,
14a and G received by the antennas 12a and 14a.
RF amplifiers 12b and 14b for amplifying PS signals, local oscillators 12c and 14c, and IF amplifiers 12d and 14d
And DSP (Digital Signal Processor) 12e, 14
e, CPUs 12f and 14f, and storage means 12g and 14
g.

The local oscillators 12c and 14c modulate the GPS signals amplified by the RF amplifiers 12b and 14b,
The conversion of the carrier frequency is performed. IF amplifier 12
d and 14d amplify the intermediate frequency band of the frequency-converted GPS signal. The DSPs 12e and 14e
It converts a GPS signal in an analog state into a digital signal. The CPUs 12f and 14f include the DSPs 12e and 1
Receiving the digital signal from 4e, necessary phase data and the like are extracted and stored in the storage means 12g and 14g.

The first and second GPs configured as described above
In the kinematic survey performed by the S receivers 12, 14, a preparatory measurement to determine the integer bias is first performed. Note that the preparatory measurement may be performed at the beginning, the end, or in the middle of the survey. Then, when this preparation measurement is completed, the first 2GPS receiver 14 measurer backpack, measuring about 1 seconds to minutes by positioning the antenna 14a is performed in the measurement point B _0, the next measurement when the measurement is completed sequentially performed similar measurement and moves to point B _1.

At the time of such a measurement, the control device 10 of the present embodiment is used. 2 and 3 show the control device 10
The control device 10 shown in FIG. 1 is in a handy terminal format that can be carried by a measurer and various operations can be performed at hand. As shown in FIG. 2, the control device 10 is provided with a graphic display unit 10b on the upper surface side of the main unit 10a.
A key input unit 10c and an azimuth detecting unit 10d are arranged below the key input unit 10c.

The key input unit 10c is used for the GPS receiver 1
The second GPS receiver 14 has the same function as the key input units 2 and 14 and has a handy terminal format.
All operations can be performed. FIG. 3 is a block diagram showing functions of the control device 10. The control device 10 includes a communication input / output unit 1 built in a main body 10a.
0e and a data processing unit 10f. The communication output unit 10e, the along with the position and altitude information of the satellite 16a~d is input from the GPS receiver 12, the measurement object point to the GPS receiver 12, 14 B ₀ .about.B names of _n such Is transmitted.

The azimuth detecting unit 10d uses, for example, a magnetic compass to transmit a digitized signal, and detects the azimuth of the N pole at the current position of the second GPS receiver 14 carried by the measurer. Is done. The graphic display unit 10b is composed of, for example, a liquid crystal plate having a relatively large screen, and the zenith O of the second GPS receiver 14 is It is displayed so as to be in the position and face when the measurer grips the main body 10a.

That is, the graphic display unit 10 shown in FIG.
As shown in the example of the display state of FIG.
The lines connecting the poles and the E poles are shown as being orthogonal to each other, and the intersection of these line segments is the zenith O (the second GPS receiver 1).
4 present position), and a plurality of satellites 1
6a to 6d are displayed, and the circle shown by the solid line on the outermost periphery is displayed as if it were a horizontal line.

The data processing unit 10f is composed of, for example, a microcomputer provided with a memory device.
Communication input / output unit 10e, direction detector 10d, key input unit 1
0c and the graphic display unit 10b. In the data processing unit 10f, the communication input / output unit 10
Based on the position and altitude information of the satellites 16a to 16d from e, the satellites 16a to 16d are displayed on the celestial sphere of the graphic display unit 10b, and the measurer can determine the current Control is performed so that the azimuth of the current position of the main body 10a of the control device 10 and the azimuth on the celestial sphere correspond to the facing direction.

More specifically, for example, the direction of the N pole currently displayed on the celestial map on the graphic display unit 10b and the N pole of the direction detection unit 10d with respect to the direction in which the measurer is currently facing are shown. If there is a shift in the direction, the celestial sphere on the graphic display unit 10d is rotated by an amount corresponding to the shift, and control is performed so that they match, and such a control procedure is performed by the data processing unit 10f. Is stored in the memory device.

According to the control device 10 for kinematic survey constructed as described above, the data processing unit 10
At f, the satellites 16a to 16d that are currently receiving radio waves are displayed on the celestial map of the graphic display unit 10b, and the azimuth of the current position and the azimuth on the celestial map are determined based on the measurement value of the azimuth detecting unit 10d. Since the control is performed so as to match, the measurer sees this graphic display unit 10b,
Satellites 16a-d for the direction the measurer is currently facing
Direction can be recognized.

For this reason, when moving from one measurement point to another measurement point, even if there is a radio wave obstacle, the satellite 16a
Since the positions and the moving directions are easily and reliably recognized, interruption of the received radio wave can be avoided by avoiding the radio wave obstacle.

[0022]

As described above in detail in the embodiments,
According to the kinematic surveying control device of the present invention, the measurer can reliably and easily recognize the position of the satellite in the current direction, so that the surveying efficiency is improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an outline of a measurement state of kinematic survey using a control device according to the present invention.

FIG. 2 is a perspective view showing an example of a control device according to the present invention.

FIG. 3 is a functional block diagram of a control device according to the present invention.

[Explanation of symbols]

 Reference Signs List 10 control device 10b graphic display unit 10c key input unit 10d azimuth detection unit 10e communication input / output unit 10f data processing unit 12 first GPS receiver 14 second GPS receiver 16a-d satellite

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01C 15/00 G01S 5/14

Claims (1)

(57) [Claims] 1. A first GPS receiver fixedly installed at a known point for receiving radio waves transmitted from a plurality of satellites, and a portable type receiving radio waves transmitted from the satellite at the same time as the first GPS receiver. And a portable GPS used for kinematic surveying for measuring a distance between the known point and each measurement point while sequentially moving the second GPS receiver to a plurality of measurement points. A communication input / output unit for inputting the position and altitude information of the satellite from the GPS receiver and transmitting various information such as the name of the measurement target point to the GPS receiver; An azimuth detecting unit for detecting the azimuth of the current position of the 2GPS receiver; a key input unit for inputting the various information; and a graphic table for displaying a celestial map at the current position of the second GPS receiver And a communication input / output unit, a direction detector, a key input unit, and a graphic display unit, and based on the position and altitude information of the satellite from the communication input / output unit, determine the positions of the plurality of satellites. A kinematics display unit for displaying on a celestial map and controlling the azimuth of the current position and the azimuth on the celestial map based on a measurement value of the azimuth detecting unit. Control device for tick surveying.