JP2002031530A - Room dimension measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy to handle device allowing an operator to automatically measure the dimensions of a room in a short time and correct measuring errors without the need to move around. SOLUTION: The device comprises a base 2; a rotating base 1 rotatably placed on the base 2; a rotary encoder 11 for detecting the rotational angle of the rotating base 1 relative to the base 2; a counter 36 for counting pulses outputted from the rotary encoder 11; a laser range finder 5 for measuring the distance to a measuring point; a storage means for storing the outputs of the range finder and the count of the counter 36 as distance and angle data, respectively; a data input device; and a display 20 for displaying distance data and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a room size measuring device used to accurately determine the dimensions of a tatami or carpet so as to fit into a room when a new tatami or carpet is laid. The configuration is such that accurate measurement can be performed without any trouble.

[0002]

2. Description of the Related Art When laying a tatami or carpet in a room, the actual area of the room is not necessarily the same as the area of the room described. Based on the measurement results, the tatami mats and carpets were cut according to the shape of the room. Since the actual dimensions of the room were measured manually with a tape measure and a ruler, it required a lot of time and effort, requiring experience and skill, and even if the length could be measured accurately, It was difficult to accurately measure the angle of the part.

[0003] Therefore, there is a demand that anyone can accurately measure the dimensions of a room in a short time without requiring any experience or skill and to obtain a measuring means that is easy to carry. A base, a rotary table rotatably mounted on the base, and a rotary mounted on the rotary table and generating a number of pulses proportional to a rotation angle of the rotary table with respect to the base. An encoder, a first counter for counting pulses output from the rotary encoder, a linear encoder mounted on a rotary table and detecting the length of a drawn wire, and an output from the linear encoder A second counter that counts the number of pulses to be applied, a laser light source that is mounted on the turntable and emits a visible laser beam in the direction of the turntable, Department Dimension measuring apparatus of the room having a storage means for storing angle data and length data when the combined has been proposed in JP-A 6-34371 JP.

[0004] Further, a reflector having a reflection surface having a fan-shaped cross section and having a curved surface, and a plurality of prisms for reflecting light rays incident on the reflection surface in an incident direction, a base, and a circulating light on the base. A rotary table movably mounted, a rotary encoder mounted on the rotary table, for generating a number of pulses proportional to a rotation angle of the rotary table with respect to the base, and a rotary encoder output from the rotary encoder; A first counter for counting the number of pulses, a laser range finder mounted on a turntable to measure the distance to the reflector, and a second counter when the measured distance to the reflector indicates a minimum value. Japanese Patent Application Laid-Open No. 5-288549 has already proposed a room size measuring device including a storage means for storing the count value of the counter 1 and the output of the laser distance meter as angle data and distance data.

[0005]

However, in the above invention, the angle data can be obtained by the rotary encoder, but the length data must be obtained by drawing out the linear body by the linear encoder. Therefore, it is very inconvenient, and the length of the linear body is limited, so that it is difficult to measure a large room. Further, in the invention using the laser range finder, the laser beam is amplitude-modulated by a signal of a constant frequency and transmitted, the reflected light reflected by the reflector is received, and the position of the modulated signal of the transmitted light and the reflected light is changed. The distance to the reflector is calculated based on the phase difference. However, the measurement by the laser is susceptible to the external environment such as the atmospheric pressure, the temperature, and the wind speed, so that accurate dimension measurement cannot be performed.

Therefore, during or before or after the measurement of the room dimensions, distance data measured by a laser range finder is displayed on the display at one or more measurement points, and the same measurement points are measured by a ruler such as a ruler. Measured distance data, or the difference between the distance data and the measured distance data, was considered to minimize the measurement error by correcting the distance data of the laser rangefinder according to the measured distance data. It is.

[0007]

According to a first aspect of the present invention, there is provided a room size measuring apparatus, comprising: a base; a turntable rotatably mounted on the base; A rotary encoder that generates a number of pulses proportional to the rotation angle of the turntable with respect to the base, a counter that counts pulses output from the rotary encoder, and a laser distance meter that measures a distance to a measurement point Also provided are storage means for storing the measured output of the laser distance meter and the count value of the counter as distance data and angle data, respectively, a data input device, and a display for displaying distance data and the like. A dimension measuring device for a room to measure, at or before and after the dimension measurement, for one or more measurement points, the distance data measured by the laser distance meter is displayed on the display, and the same measurement point is measured by a ruler or the like. Set By inputting the actually measured distance data or the difference between the distance data and the actually measured distance data from the input device, and correcting the distance data of the laser range finder according to the actually measured distance data, the measurement error is minimized. Has functions.

According to a second aspect of the present invention, there is provided a room size measuring apparatus, comprising: a base; a turntable rotatably mounted on the base; A rotary encoder that generates a number of pulses proportional to the rotation angle of the turntable, a laser rangefinder that measures the distance to the measurement point, and a pulse that is generated each time the drawn linear object moves a certain distance A linear encoder is installed, a probe coupled to the tip of the linear body, a first counter for counting pulses output from the rotary encoder,
A second counter for counting the pulses output from the linear encoder;
Storage means for storing the count value of the first counter as angle data, and storing the count value of the second counter as second distance data; and a data input device; And a display device for displaying distance data and the like, wherein the first distance data measured by the laser distance meter is measured for one or more measurement points during or before or after the dimension measurement. The distance is displayed on the display, and the second distance data obtained from the linear encoder by further matching the probe to the same measurement point is displayed on the display, and when there is a difference between the two distance data, It has a function of inputting the first distance data of the laser distance meter for correction from the input device so as to match the second distance data, and minimizing a measurement error.

According to a third aspect of the present invention, there is provided a room size measuring apparatus according to the present invention, wherein: a base; a turntable rotatably mounted on the base; A rotary encoder that generates a number of pulses proportional to the rotation angle of the turntable, a laser rangefinder that measures the distance to the measurement point, and a pulse that is generated each time the drawn linear object moves a certain distance A linear encoder is installed, a probe coupled to the tip of the linear body, a first counter for counting pulses output from the rotary encoder,
A second counter for counting the pulses output from the linear encoder;
Storage means for storing the count value of the first counter as angle data, and storing the count value of the second counter as second distance data. An apparatus for measuring a first distance of a laser distance meter when there is a difference between first distance data and second distance data for one or more measurement points during or before and after dimension measurement. It has a function of automatically correcting data in accordance with the second distance data.

The room size measuring apparatus according to the invention of claim 4 further comprises an indicator for displaying data such as first distance data and second distance data. It is a measuring device.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A room size measuring apparatus according to the present invention has three legs 21 as shown in FIG.
And a circular turntable 1 rotatably mounted on the base 2 via a bearing 22,
A gear 23 is concentrically fixed to the circular base 2, and a motor 14 that meshes with the gear 23 to rotate the turntable 1 itself in any direction is provided on the turntable 1.
Incremental rotary type that detects the rotation angle of
An encoder 11, a laser distance meter 5 for measuring a distance,
An incremental linear encoder 13 for detecting the length of a linear member 17 such as a drawn wire or tape; a display 20 for displaying distance data; a circuit board 30 incorporating a signal processing circuit; Element 16
And a storage battery 19 for operating these devices as a whole.

The rotary encoder 11 has a small gear 12 which meshes with a gear 23 of the base 2. When the turntable 1 is rotated, the rotary encoder 11 is rotated at an increased speed, and its rotation angle is increased only during the rotation. Generates a number of pulses proportional to

The laser range finder 5 transmits the laser beam after modulating the amplitude of the laser beam with a signal of a constant frequency, receives the reflected light reflected at the measuring point (such as a wall), and analyzes the transmitted light and the reflected light. The distance to the measurement point (such as a wall) is calculated based on the phase difference between the modulated signals.

The linear encoder 13 has the linear member 17 wound by a spring.
When the linear member 17 is moved by a predetermined distance, a pulse is generated.

The probe 4 is connected to the tip of the linear body 17. As shown in FIG. 2, the probe 4 is a pyramid-shaped box body having a sharp front end 41 and an open rear end, and can be rotated at a position as close to the front end as possible as a fulcrum 43. The crank-shaped rotating member 42 and the crank-shaped rotating member 4
2 and a connecting member 44 connected between the linear body 17.

As shown in FIG. 3, the signal processing circuit includes a CPU 31 for controlling the whole apparatus, a first counter 36 for calculating a pulse generated from the rotary encoder 11, and a pulse for calculating a pulse generated from the linear encoder 13. A second counter 37, and these two counters 36, 37
Is input to the CPU 31 to control the motor 14, and the ROM 33 storing the processing program.
And a RAM 34 for temporarily storing data, and an SIO 35 for taking in a distance signal output from the laser range finder 5 and exchanging data with an external device 50.

In addition, a remote control device (not shown) for generating signals such as "initial setting", "measurement", "cancel", and "completion" and inputting them to the optical sensor 16 by light rays is provided. I have. This remote control device functions as an input device. Of course, it goes without saying that an input device may be provided in the measuring instrument body.

Next, a procedure for measuring the size of a room by the apparatus of the embodiment configured as described above will be described.

First, as shown in FIG. 4, the dimension measuring device A is installed substantially at the center of the room (indicated by a star), and the laser distance meter 5 is directed in the direction of the first measuring point. Then, operate the remote controller and enter the necessary conditions for measurement such as “room standard size (58, 36, Honma)”, “room size (tatami mats)”, etc. " At this time, data such as “site name”, “room number”, and “tatami type” can be input at the same time.

According to the input initial setting conditions, the number of measuring points is 12 in 4 tatami mats and 6 in the case of normal measurement.
14 places in tatami mats, 24 places in 4.5 tatami mats if measuring in a booth,
It is set at 28 places on 6 tatami mats. In this initial setup,
The two counters 36, 37 are cleared to zero.

The distance to the first measurement point is measured by the laser distance meter 5. The distance data at this time is stored in SIO35
Ingest through. At this time, the first counter 3
The count value (zero) according to 6 is taken in through the PIO 32,
The distance data and the angle data (zero) of the first measurement point are stored in the RAM 34, respectively.

Next, the remote controller is operated, the motor 14 is controlled, the dimension measuring device A is pointed in the direction of the second measuring point, and the distance to the second measuring point is measured by the laser distance meter 5. I do. When rotating from the first measurement point to the second measurement point, the turntable 1 keeps counting the pulses generated from the rotary encoder 11 by the first counter 36. The distance data and the angle data at this time are stored in the RAM via the SIO 35 and the PIO 32 as the distance data and the angle data of the second measurement point, respectively.
34.

Similarly, the distance data and the angle data for each measurement point are stored in the RAM 34 in sequence with the measurement points. Then, when the data of the number of measurement points under the initially set conditions is stored in the RAM 34, the measurement is completed.

Here, it is necessary to perform a correction operation in order to minimize the measurement error of the laser length measuring device 5. During or before and after the measurement of the dimensions of the room, the first distance data measured by the laser range finder 5 is displayed on the display 20 for one or more measurement points, and the linear encoder 13 is used to display the linear object 17 from the linear encoder 13. The probe 4 is pulled out, the tip of the probe 4 is adjusted to the same measurement point, and the pulse generated from the linear encoder 13 is counted by the second counter 37.
And stores it in the RAM 34, and displays the second distance data on the display 20.

For the measurement of the second distance data,
If one or more measurements for correction are performed before starting measurement with the laser length measuring device 5, the measured value of the laser length measuring device 5 at the same angle as the angle data at that time is used as the first distance data. It is efficient because it can be. Of course, the second distance data may be measured by applying the tip of the probe 4 to the position irradiated by the laser during the measurement by the laser measuring device 5. After the length measurement is completed by the laser length measuring device 5, the second distance data may be measured.

At this time, the ratio between the first distance data of the laser range finder 5 and the second distance data of the linear encoder 13 is obtained, and the result is obtained as a correction value.
By multiplying all the first distance data stored in 4 by the correction value, the measurement error of the laser distance meter 5 can be minimized.

For example, when the first distance data of the laser range finder 5 is displayed on the display 20 as 2,000 mm, and the second distance data of the linear encoder 13 is displayed on the display 20 as 2,004 mm. A ratio between the first distance data and the second distance data is calculated, and a correction value 2004/2000 =
1.002 can be obtained. Therefore, the correction value 1.002 for all the first distance data measured in the same room.
, And the corrected distance data is stored in the RAM 34.

When the first distance data of the laser distance meter 5 is displayed on the display 20 as 2,000 mm, and the second distance data of the linear encoder 13 is displayed on the display 20 as 1,998 mm, The ratio between the first distance data and the second distance data is calculated, and the correction value 1998/2000 =
0.999 can be obtained. Therefore, the correction value 0.999 is applied to all the first distance data measured in the same room.
, And the corrected distance data is stored in the RAM 34.

It is not necessary to perform this correction work in all the rooms. If there is little change in the external environment such as the atmospheric pressure, temperature, and wind speed in each room, the correction value obtained in the first room may be used continuously. It is possible. Further, when the room is in direct sunlight or cloudy while measuring the same room, the correction value can be changed from a certain measuring point to a certain measuring point and at other measuring points. The correction value obtained once should be used continuously until the next correction work is performed. However, since the atmospheric pressure, temperature, wind speed, and the like change every day, it is necessary to perform the correction operation at least once a day.

The measuring points used for the correction work may be other than the actual dimension measuring points. However, the measuring points are preferably as flat as possible without unevenness and having a measuring surface perpendicular to the laser measuring direction. Desirably, for illustration, FIG.
If a laser rangefinder is installed in front of the threshold,
The measurement point at which the distance from the laser rangefinder to the threshold is the shortest is the measurement point suitable for the correction work.

After completion of the correction work, the measuring apparatus main body A is
The external device 50 is connected to an external device 50 such as a personal computer via the IO 35, reads out the data stored in the RAM 34 for each room, and performs a coordinate conversion process using the external device 50.

The data stored in RAM34 is a polar coordinate data around the location where the measuring device main body A is installed, as shown in FIG. 6, the size of each side L ₁ ~L _n, 2 included angle theta ₂ through? _n sandwiched sides (where, n is the number of measurement points) since it is, very long _{S i} (however, i = 2 or more integer) is ^{_{S i = {L 1 2 +}} L i ^{_{2 -2L 1 · L i · cosθ}} i}
Can be obtained by ^1/2, _also, L 1, _{L i} and _{S i}
Unknown included angle phi _i of _{L 1} and _{S i} in triangle made by ^{_{the, cosφ i = (L 1 2}} + S i 2 -L i 2) / (2L 1 ·
S _i) from ^{_{φ i = cos -1 {(L}} 1 2 + S i 2 -L i 2) / (2
L ₁ · S _i )｝. In this way, the actual shape of the room can be measured.

In the case of expressing the image by converting it into an XY coordinate system, for example, both ends (L ₁ , θ _1, L
₃ , θ ₃ ) is taken on the X axis, and perpendicular to (L
₁ , θ ₁ ) on the Y-axis, each point (L _i , θ
_i) is a point _(x i, as _{y i),} obtained by _{x i = L 1 cosφ 3 -L} 1 cos (θ i + φ 3) y i = L 1 sinφ 3 -L 1 sin (θ i + φ 3) be able to. This coordinate conversion is performed by the CPU 31 incorporated in the main body, and only the XY coordinate data can be read out to the external device 50.

As described above, the measurement by the laser is easily affected by the external environment such as the atmospheric pressure, the temperature, and the wind speed, but the result of minimizing the measurement error can be obtained by performing the correction operation. .

(Second Embodiment) In the first embodiment, the second
The first distance data measured by the laser distance meter 5 was automatically corrected on the basis of the distance data, but the first distance data and the second distance data are displayed on the display 20 and both data are displayed. If there is a difference, the first distance data measured by the laser distance meter 5 may be corrected by manually inputting the difference.

(Third Embodiment) In the second embodiment, the second
The first distance data was corrected by manual input based on the distance data, but the linear encoder 13 was not used.
The distance may be actually measured by a ruler or the like, and the measured value may be manually input, or the difference between the measured value by the ruler and the first distance data measured by the laser distance meter may be manually input as the correction value. Inputting a correction value and correcting the distance data according to the correction value is as described above, and thus will not be repeated here. In this case, the linear encoder 13, the linear body 17,
The probe 4 and the second counter 37 become unnecessary.

(Fourth Embodiment) In the first embodiment, the second
The distance data and the first distance data measured by the laser range finder 5 are displayed on the display 20 and are automatically corrected. However, without using the display 20, the two data are compared and automatically compared. Correction may be performed. In this case, the display 20 becomes unnecessary.

(Other Embodiments) The four corners of a room where it is difficult to limit the laser measurement points and the measurement accuracy is inferior are not measured by the laser distance meter 5, but the position coordinates of the corners are calculated from the measured values of the measurement points near the corners. Alternatively, it may be calculated and displayed. The calculation may be performed by a control calculation program created in advance, and may be displayed on a display as needed.
Specifically, the contents of the control calculation program are as follows: after converting the measured values of the measurement points after correction into X and Y coordinate values, for example, as shown in FIG. A straight line formula is also created from the measurement points, and a formula for finding the intersection of both straight lines is created. It is good to set the positions of and as measurement points as close to the corners as possible.
The X and Y coordinate values of the corners of the room can be calculated by the control calculation program by measuring with the laser distance meter 5 or the linear encoder 13 in order to obtain the X and Y coordinate values of the measurement points. The operator only has to perform a simple operation, for example, pressing the "measurement of corner calculation" button with the remote control device every time the measurement is performed, so that the dimension measuring device can recognize that the data is for the corner calculation. is there.

In the case of a dimension measuring device having the probe 4, in addition to the length measurement for correction, a corner of a room may be measured and its data may be used.

In each of the embodiments described above,
The collected data of each room is stored in the RAM 34, and the SIO
7, output to an external device 50 such as a personal computer, as shown in FIG. 7. Instead of the RAM 34 and the SIO 35, the socket 39 is connected to a bus drawn from the CPU 31, and An IC card 38 with a built-in memory IC is mounted, and the collected data of each room is stored in the memory IC of the IC card 38.

When the data of all the rooms has been collected, the IC card 38 is removed from the socket 39 and connected to a personal computer or the like, and the collected data can be transferred and processed. It goes without saying that various other data transfer means such as transfer using a mobile phone and transfer by wire or wireless means can be employed.

As shown in FIG. 3, if a small printer 7 is provided in the measuring device and connected via the SIO 35 so that the measured data is printed by the printer 7, it is possible to use the measuring device at the measurement site. You can know the polar coordinate data.

Further, if the CPU 31 is configured to convert the measured polar coordinate data into an XY coordinate system,
The data converted into the XY coordinate system by the printer 7 can be printed.

As for the printed output, in addition to the one in which each measurement point is expressed in the XY coordinate system with the reference point as the origin, when tatami or tiles are laid, standard dimensions are determined like tatami or tiles. It is also possible to print data expressed as a deviation value from the standard size based on the data that is present.

When the display 20 is mounted, the measured data may be displayed on the display 20.

In each of the above embodiments, an incremental encoder is used as the encoders 11 and 13. However, an absolute encoder may be used. In this case, two counters 36 and 37 are used. There is no need to provide it, and an absolute encoder may be connected directly to the PIO 32.

[0047]

As is clear from the description based on the above embodiment, the room size measuring device of the present invention is a measuring device that is easy to carry and does not require experience or skill. By having a correction function, conventionally, by using a laser distance meter that could not measure accurately dimensions, there is no need to draw out the line state when measuring each part,
Room dimensions can be measured without any hassle.

[Brief description of the drawings]

Fig. 1 Room size measuring device

[Fig. 2] Probe

FIG. 3 is a block diagram showing a signal circuit of the device shown in FIG. 1;

FIG. 4 is a plan view showing a situation in which data of the room shown in FIG. 1 is obtained.

FIG. 5 Measurement points suitable for correction

FIG. 6 is a diagram showing a measurement principle of a room size measuring device.

FIG. 7 is a diagram showing a circuit according to another embodiment of the present invention;

FIG. 8 is a diagram illustrating the principle of calculating the coordinates of a corner of a room by calculation.

[Explanation of symbols]

 Reference Signs List 1 turntable 2 base 4 probe 5 laser distance meter 11 rotary encoder 12 small gear 13 linear encoder 14 motor 15 laser beam 16 optical sensor 17 linear body 19 storage battery 20 display 21 legs 22 bearing 23 gear 30 circuit board 31 CPU 32 PIO 33 ROM 34 RAM 35 SIO 36 First counter 37 Second counter 38 IC card 39 Socket 41 Tip 42 Rotating member 44 Coupling member 50 External device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) (72) Inventor Masaki Kuroyasu 190 Hikai, Tatsuno-cho, Tatsuno-cho, Tatsuno-shi, Hyogo Pref.

Claims (4)

[Claims] 1. A base, a turntable rotatably mounted on the base, and a number of pulses generated on the turntable in proportion to a rotation angle of the turntable with respect to the base. A rotary encoder, a counter for counting pulses output from the rotary encoder, and a laser range finder for measuring the distance to the measurement point are installed. The output of the laser range finder and the count value of the counter are measured. A storage means for storing distance data and angle data, a data input device, and a display device for displaying distance data and the like, respectively. The distance data measured by the laser distance meter is displayed on the display unit for more than one measurement point, and the same measurement point is measured by a ruler such as a ruler. Difference was input from the input device, the distance data of the laser rangefinder, by correcting in accordance with the measured distance data, the size measuring device of the room, characterized in that the measurement error to a minimum. 2. A base, a turntable rotatably mounted on the base, and a number of pulses generated on the turntable in proportion to a rotation angle of the turntable with respect to the base. A rotary encoder, a laser range finder that measures the distance to the measurement point, and a linear encoder that generates a pulse every time the drawn linear object moves a certain distance are installed at the tip of the linear object. A coupled probe, a first counter for counting pulses output from the rotary encoder, a second counter for counting pulses output from the linear encoder, Storage means for storing the output as first distance data, further storing the count value of the first counter as angle data, and storing the count value of the second counter as second distance data; Input device and And a display device for displaying distance data and the like, comprising: a first distance data measured by the laser distance meter for one or more measurement points during or before or after the dimension measurement. Is displayed on the display, and the second distance data obtained from the linear encoder by matching the probe to the same measurement point is displayed on the display. If there is a difference between the two distance data, A room dimension measuring apparatus characterized in that the first distance data of the laser distance meter is input for correction from the input apparatus so as to match the second distance data, and a measurement error is minimized. . 3. A base, a turntable rotatably mounted on the base, and a number of pulses generated on the turntable in proportion to a rotation angle of the turntable with respect to the base. A rotary encoder, a laser range finder that measures the distance to the measurement point, and a linear encoder that generates a pulse every time the drawn linear object moves a certain distance are installed at the tip of the linear object. A coupled probe, a first counter for counting pulses output from the rotary encoder, a second counter for counting pulses output from the linear encoder, Storage means for storing the output as first distance data, storing the count value of the first counter as angle data, and storing the count value of the second counter as second distance data. Room dimensions A measuring device for measuring a distance between the first distance data and the second distance data at one or more measurement points during or before and after the dimension measurement. A room size measuring apparatus for automatically correcting distance data according to second distance data. 4. The room size measuring apparatus according to claim 3, further comprising a display for displaying data such as first distance data and second distance data.