JPH07159160A - Surveying machine equipped with automatic focusing device - Google Patents

Abstract

PURPOSE:To reduce the electric power consumption, permit an automatic focusing device to operate only in the case of necessity, and reduce error to the min., by installing a sensor switch besides an electric power source switch and operating the device only in the case where at least one among the sensor switches is turned on. CONSTITUTION:A sensor switch 19 for the operation start of an automatic focusing device 10 is installed at the part where an operator necessarily touches or approaches at the time of starting survey. Midway in the measurement start operation, the switch 19 performs detection by itself, and the device 10 starts operation. The incident light is divided by a half mirror 15, and is directed to an optical sensor 16 and an eyepiece 17. At this time, the image in the sensor 16 is sent to a CPU 18 by a connection line. When the switch 19 is turned on by the presence of an operator, the CPU 18 calculates the shift quantity of the focusing lens 12 on the basis of the information supplied from the sensor 16. Then, the result is outputted to a drive control part 22, and the lens 12 is slid along the optical axis by driving a driving motor 14, and focusing is carried out, and the error generated by the movement of a collimation system can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveying instrument equipped with an automatic focusing device (so-called autofocus mechanism).

[0002]

2. Description of the Related Art Conventionally, in cameras, video cameras and the like, a shutter button and a recording start switch have been sensors for starting an automatic focusing device. It is known to have a working state and a changeover switch. However, none of the surveying instruments has a sensor that triggers an automatic focusing mechanism.

[0003]

In a surveying instrument equipped with an automatic focusing device, when the automatic focusing device is activated immediately when the power is turned on for surveying, the power consumption is large, Further, if the automatic focusing device operates when the collimation system moves, there is a problem that the error becomes large. Further, if the automatic focusing device is always activated and the collimation system is moving, the error becomes large.

Further, taking the focusing work in the surveying instrument as an example, in the surveying instrument, the focusing work is carried out by a plurality of tasks such as first directing the telescope in the desired direction and then using the fine adjustment screw. If a dedicated operation switch is provided for the automatic focusing device in this way, it is necessary to consider the timing, position, etc. of switching on the automatic focusing device in addition to the normal operation of the surveying work. However, there is an inconvenience that it becomes complicated.

An object of the present invention is to provide a surveying instrument equipped with an automatic focusing device capable of performing automatic focusing by the same operation as a normal surveying operation. Another object of the present invention is to provide a surveying instrument that consumes less power and operates an automatic focusing device only when necessary, thereby minimizing an error.

[0006]

SUMMARY OF THE INVENTION An automatic focusing device for a surveying instrument according to the present invention is operated by a start starting switch of an automatic focusing device which is different from a power switch. Is a sensor switch, which is provided on at least one of an eyepiece part of the telescope part, a telescope tilting operation knob provided near the eyepiece part, and a fine movement knob for finely adjusting the collimation direction. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention and can be variously modified within the scope of the gist of the present invention. 1 to 4 show a first embodiment of the present invention, and FIG. 1 shows a total station as a surveying instrument S. In FIG. 1, reference numeral 30 is a telescope section, and reference numeral 23 is a total station. The focus knob, reference numeral 24 is an eyepiece of the telescope unit 30, reference numeral 28 is a horizontal fine movement knob, and reference numeral 29 is a telescope fine movement knob. 2 is a schematic configuration diagram of the automatic focusing device, and FIG. 3 is a sectional view of the focusing knob.

As shown in FIG. 2, the automatic focusing device 10 of the present embodiment has an objective lens 11, a focusing lens 12, a mechanism section 13 for moving the focusing lens 12, and a mechanism section 1.
3, a drive motor 14 for driving 3, a half mirror 15,
Optical sensor 16 for receiving light from the half mirror 15
An eyepiece lens 17, an arithmetic unit (CPU) 18 connected to the optical sensor 16 and the drive motor 14, and the CP.
Sensor switch 19 connected to U18, and power supply unit 2
0 and a power switch 21.

The light that enters from the objective lens 11 and goes to the focusing lens 12 is split by the half mirror 15 and goes to the optical sensor 16 and the eyepiece lens 17. The electric signal from the optical sensor 16 is sent to the CPU 18. The power supply unit 20 is provided with a power switch 21, and various functions of the surveying instrument S are activated by turning on the power switch 21.

The CPU 18 is connected to the power source section 20,
Further, the CPU 18 is provided with a sensor switch 19. When the sensor switch 19 is turned on, the CPU 18 calculates the movement amount of the focusing lens 12 for autofocusing (automatic focusing) based on the information input from the optical sensor 16.
Is output to the drive control unit 22 connected to. The drive control unit 22 drives the drive motor 14 to slide the focusing lens 12 along the optical axis for focusing.

The sensor switch 19 of this example is for starting automatic focusing and, as shown in FIGS. 1 and 3,
It is provided on the focusing knob 23 formed on the eyepiece 24 of the surveying instrument S. That is, as shown in FIG. 3, a focusing knob 23 is rotatably provided via a surveying instrument main body 25 and an insulating portion 26. The focusing knob 23 is a knob rubber portion 23a that constitutes a sensor portion. Is provided. The sensor switch 19 used in this example responds when the rubber portion 23a of the focusing knob 23 is touched or a human body such as a finger or an eye approaches. Reference numeral 27 is a slip ring, which detects the detection signal from the sensor switch 19 by CP.
It plays the role of a connecting line for sending to U18.

The sensor switch 19 may be a contactless switch or a contact switch. As the non-contact switch, various known switches such as electrostatic capacity, infrared ray, ultrasonic wave, pressure switch, photoelectric switch and the like can be used as the contact switch.

Although not shown in the above embodiment, the sensor switches 19 are provided at a plurality of places. That is,
As described above, the portion of the focusing knob 23 used to orient the telescope unit toward the collimation direction, or the eyepiece unit 24.
It is a knob part in the vicinity, and as another part, it is provided on the part of the horizontal fine movement knob 28 or the telescope fine movement knob 29 for accurately adjusting the collimation. For example, when the sensor switch 19 is provided on the horizontal fine movement knob 28,
It can be configured as shown in FIG.

Next, the operation of the embodiment having the above-mentioned structure will be described. First, the power switch 21 of the surveying instrument S is turned on, and the surveying instrument S performs the surveying operation. Then, during the surveying work, when the direction of the telescope section 30 is oriented toward the collimation direction, the eyepiece section 24 is looked into. At this time, the focusing knob 2
Fingers, eyes, etc. approach or touch the vicinity of 3. At this time, the sensor switch 19 is activated and the automatic focusing device 10 is started. In this way, the power switch 21
Is ON, any one of the sensor switches 19 provided in the surveying instrument S is turned ON. That is, the sensor switch 19 for starting the operation of the automatic focusing device 10 is provided at a portion which the operator always touches or approaches when the surveying instrument S starts to measure, and while the surveying instrument S is being used to start measurement, The sensor switch 19 detects this by itself, and the automatic focusing device 10 starts to operate.

The light that enters from the objective lens 11 and goes to the focusing lens 12 is split by the half mirror 15 and goes to the optical sensor 16 and the eyepiece lens 17. At this time, the image on the optical sensor 16 is obtained by connecting the connecting line
Sent to 18. Then, when the sensor switch 19 is turned on by the presence of an operator or the like as described above, the focusing lens 12 is detected based on the information input from the optical sensor 16.
Is calculated by the CPU 18 and output to the drive control unit 22. The drive control unit 22 drives the drive motor 14 to slide the focusing lens 12 along the optical axis for focusing. .

By attaching the sensor switch 19 to a predetermined portion of the surveying instrument S as described above, the automatic focusing device 10 can be started. Then, a portion of the focusing knob 23 used for determining the direction of the telescope portion toward the collimation direction, a knob portion in the vicinity of the eyepiece portion 24, and a horizontal fine movement knob 2 for accurately adjusting the collimation.
8. If the sensor switch 19 is provided on the portion of the telescope fine movement knob 29 or the like, the surveying work can be performed most reasonably.

FIGS. 5 to 7 show sensor switches 19 respectively.
And various examples of disposing locations. Also in these examples, the same operational effects as those of the above-mentioned examples are exhibited. In these figures, the same members and arrangements are designated by the same reference numerals and the description thereof is omitted.

FIG. 5 shows an example in which a sensor switch is provided on the knob 31 near the eyepiece 24. In this example, the push switch 31a is attached to the inside of the knob 31. That is, in this example, the push switch 31a is turned on when the knob is pinched from above and below, but the sensor switch has the knob rubber portion 31b.
Alternatively, the entire knob may be used as a pressure sensor. The knob rubber portion 31b is an insulating portion.

FIG. 6 shows an example using an infrared sensor switch or an ultrasonic sensor switch 32.
In this example, the sensor switch 32 is arranged at a position above the eyepiece 24, but the human body (finger or the like) is placed in the eyepiece 2
4 or a position where it can be sensed when approaching the knob part, the position may not be above the eyepiece part 24.

FIG. 7 shows an example using the photoelectric switch 33. In this example, the photoelectric switch 33 is arranged inside the knob portion 31, and an opening 34 is formed above the knob portion 31. ing. Then, the photoelectric switch 33 directed to the opening 34 is normally operated, and the photoelectric switch 33 is operated by closing the opening 34.

[0021]

As described above, the automatic focusing device of the present invention is operated by the start-up switch of the automatic focusing device which is different from the power switch, and the start-up switch is a sensor switch. Yes, because it is provided in at least one of the eyepiece of the telescope, the knob for tilting the telescope provided near the eyepiece, and the fine movement knob that finely adjusts the collimation direction, so that the power switch is turned on. , The automatic focusing device does not work, and it operates only when any of the sensor switches other than the power switch is in the ON state, so it consumes less power and is located near the eyepiece of the telescope. The automatic focusing device operates only when operating the provided telescope tilting control knobs and the fine movement knobs for fine adjustment of the collimation direction. An optical system is moved by use, it is possible to prevent errors caused by the collimation system moves.

Further, no switch operation other than the operation during normal surveying work is required, and rational automatic focusing can be performed by the same surveying work as in the past.

[Brief description of drawings]

FIG. 1 is a perspective view of a surveying instrument according to the present invention.

FIG. 2 is a schematic configuration diagram of an automatic focusing device.

FIG. 3 is a sectional view of a focusing knob showing an embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a horizontal fine movement knob (vertical fine movement knob).

FIG. 5 is an explanatory diagram showing another embodiment.

FIG. 6 is a sectional view of an essential part for explaining yet another embodiment.

FIG. 7 is an explanatory diagram showing an example using a photoelectric switch.

[Explanation of symbols]

10 Automatic Focusing Device 11 Objective Lens 12 Focusing Lens 13 Mechanism Section 14 Drive Motor 15 Half Mirror 16 Optical Sensor 17 Eyepiece 18 CPU 19, 23a, 31a, 32, 33 Start Switch of Automatic Focusing Device (Sensor Switch) ) 20 power supply 21 power switch 24 eyepiece 28 fine adjustment knob 29 horizontal fine adjustment knob 30 telescope S surveying instrument

Claims (1)

[Claims] 1. A surveying instrument equipped with an automatic focusing device, wherein the automatic focusing device is operated by a start-start switch of the automatic focusing device, which is different from a power switch, The switch is a sensor switch, and is provided in at least one of an eyepiece part of the telescope part, a telescope tilting operation knob provided near the eyepiece part, and a fine movement knob for finely adjusting the collimation direction. Surveyor equipped with an automatic focusing device.