JPH05288549A - Size measuring device for room - Google Patents

Abstract

PURPOSE:To easily and accurately measure the size of a room without requiring experience or skill by providing a rotary encoder generating the output corresponding to the rotational angle of a rotary bed against a base and a laser range finder on the rotary bed. CONSTITUTION:A measuring device is installed at the center of a room, and a reflector is installed at a measurement point. A motor 14 is rotated at a high speed, and a laser range finder (DM) 13 outputs the distance signal each time it is directed to the reflector. When the distance signal is outputted, it is fed to a computer 31 via a SIO 35, and the revolving speed of the motor 14 is switched to a low speed. When the shortest distance signal is detected while the motor 14 is rotated at a low speed, the counted value of a counter 36 is read via a PIO 32 as the angle data, the shortest distance signal within the laser distance signal is read via the SIO 35 as the distance data, and the rotation of the motor 14 is stopped. These actions are made for all reference points, and data are stored in a RAM 34. The CPU 31 performs the preset calculation based on the data to measure the shape of the room.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates mainly to a room size measuring device used for determining the size of a tatami mat or a carpet so as to fit the room when a new tatami mat or a carpet is laid. Is designed to be easy and convenient to carry.

[0002]

2. Description of the Related Art When laying a tatami mat or a carpet in a room, the actual area of the room is not always the same as the marked area. The tatami mats and carpets were cut according to the shape of the room.

Since the actual size of a room is manually measured by a ruler, it requires experience and skill, and it takes a lot of time and labor. Moreover, even if the length can be accurately measured, It was difficult to measure the angle of the corner accurately.

Therefore, the inventors of the present invention have proposed a base, a rotary base rotatably mounted on the base, and a rotary base mounted on the rotary base and rotating the rotary base with respect to the base. A rotary encoder that produces a number of pulses proportional to the angle,
It is equipped with a linear encoder that is placed on a rotating table and that generates a number of pulses that is proportional to the length of the tape that is pulled out, and a rotary encoder when the tip of the tape is aligned with the reference point to be measured. A measuring device for obtaining angle data and length data based on the count value with a linear encoder has already been proposed as Japanese Patent Application No. 3-33521.

In this measuring device, however, the angle data can be obtained by the rotary encoder, but the length data must be obtained by pulling out the tape from the linear encoder, which is inconvenient and the device becomes large. Also, it was difficult to cope with the measurement of a large room.

[0006]

Therefore, the present invention is
It was conceived to solve the problem of obtaining a measuring means that is easy to handle without requiring experience or skill, enables anyone to accurately measure the dimensions of a room in a short time, and is convenient to carry. is there.

[0007]

[Means for Solving the Problems] A base, a rotary base rotatably mounted on the base, and a rotary base mounted on the rotary base.
The rotary encoder includes a rotary encoder that generates an output corresponding to a rotation angle of the rotary base with respect to the base, and a laser distance meter mounted on the rotary base.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a room dimension measuring apparatus according to the present invention has a circular base 2 having three legs 21, and a rotatably mounted on the base 2 via a bearing 22. A circular rotary base 1 placed on the circular base 2 has a gear 23 concentrically fixed to the circular base 2, and the rotary base 1 meshes with the gear 23 to rotate the rotary base 1 itself. Incremental rotary encoder that detects the rotation angle of the motor 14
11, a laser range finder 13 for measuring a distance, a storage battery 19 for operating the entire apparatus, a circuit board 30 incorporating a signal processing circuit, an optical signal light receiving element 16 and the like are attached.

The rotary encoder 11 is a gear of the base 2.
It has a small gear 12 that meshes with 23, and when the rotary table 1 is rotated, it is rotated at an increased speed and generates a number of pulses proportional to its rotation angle only while rotating.

Further, the laser range finder 13 amplitude-modulates a laser beam with a signal of a constant frequency and sends it out, receives the reflected light reflected by the reflector B (see FIG. 3), and sends the sent light and the reflected light. Reflector B based on the phase difference of the modulation signal of
The distance to is calculated.

As shown in FIG. 2, the signal processing circuit includes a CPU 31 for controlling the entire apparatus, a counter 36 for counting the pulses generated by the rotary encoder 11, a count value of the counter 36 and an optical signal receiving element 16. Output of CPU31
PIO 32 for controlling the motor 14, a ROM 33 for storing a processing program, a RAM 34 for temporarily storing data, a distance signal output from the laser rangefinder 13, and an external device 4 and data. It is composed of SIO35 for exchanging.

In addition to this, a remote control device (not shown) for generating signals such as "initial setting", "measurement", "cancel", and "completion" and inputting them to the optical signal receiving element 16 by a light beam is attached. is doing.

As shown in the perspective view of FIG. 3, the reflector B installed at the point to be measured as a reference for position detection is provided with a reflecting surface c having a fan-shaped cross section and formed of a curved surface. A large number of prisms that reflect the incident laser beam in the incident direction are arranged, and the central portion of the reflecting surface c projects so as to be closest to the laser rangefinder 13 and both sides are formed to be farther from the laser rangefinder 13. There is.

Next, the procedure for measuring the dimensions of a room by the apparatus of the embodiment thus constructed will be described based on the flow chart of FIG.

First, as shown in FIG. 5, the measuring apparatus A is installed in the substantially center of the room, and the reflector B is installed at the measured point.

(Step 1) Operate the remote control device to
A signal of "initial setting" is transmitted to the optical signal light receiving element 16 to initialize the count value of the counter 36 to zero.

(Step 2) Operate the remote control device,
Signals such as “initial setting”, “measurement”, “cancel”, and “completion” are transmitted to the optical signal light receiving element 16.

(Step 3) It is judged whether or not the received signal is a "measurement" signal.

(Step 4) If the received signal is a "measurement" signal, the motor 14 rotates at high speed to rotate the rotary base 1 at high speed.

(Step 5) Each time the laser rangefinder 13 points to the installed reflector B, the laser rangefinder 13 outputs a range signal. When the distance signal is output once or a certain number of times, it is fetched via the SIO 35 (step 6) and the rotation speed of the motor 14 is switched to a low speed.

(Step 7) While the motor 14 is rotating at a low speed,
Distance signal output from the laser rangefinder 13 (a in FIG. 3,
When the shortest distance signal (a in FIG. 3) of b) is detected, the count value of the counter 36 at that time is used as angle data, read through the PIO 32, and output from the laser rangefinder 13 (step 8). The shortest distance signal among the measured distance signals is used as distance data, and is read via SIO35,
(Step 9) The rotation of the motor 14 is stopped.

The steps 2-9 are performed for all corners or reference points of the room.

(Step 10) When the "measurement" signal is erroneously transmitted and the angle data and the distance data are read, the remote controller is operated to direct the "cancel" signal to the optical signal receiving element 16. When transmitted and received by the optical signal receiving element 16, (step 11), the immediately preceding data is erased.

(Step 12) After the data collection at all corners or reference points is completed, the remote controller is operated to send a "completion" signal to the optical signal receiving element 16.
(Step 13) When the optical signal light-receiving element 16 receives the signal of "completion", a serial number is added to the beginning or end of the measured series of data and stored in the RAM 34.

The operations of steps 1 to 13 are executed in each room to be measured, and the data of each room is collected in the RAM 34.

Then, this measuring apparatus A is connected to an external device 4 such as a personal computer via the SIO 35, each data stored in the RAM 34 is read out for each room, and the external device 4 performs coordinate conversion processing. Do.

The data stored in the RAM 34 is polar coordinate data centered on the place where the measuring apparatus A is installed, and as shown in FIG. 5, the size of each side L1 to Ln and 2
Since it is the included angle θ2 to θn (where n is the number of measurement points) sandwiched between the sides, the length Si of the opposite side (where i = an integer of 2 or more) is Si = {L ₁ ² + Li ² -2L ₁ .Li.cos θi} ^1/2 , and the unknown included angle φi between L ₁ and Si in the triangle formed by L ₁ , Li and Si is cos φi = (L ₁ ² + Si ² −Li ² ) / (2L ₁ · Si), φi = cos ⁻¹ {(L ₁ ² + Si ² −Li ² ) / (2L ₁ · Si)}. In this way, the actual shape of the room can be measured.

In the case of conversion into an XY coordinate system, for example, a straight line connecting both ends (L ₁ , θ ₁ and L ₃ , θ ₃ ) of the upper side of the room is taken as the X axis and perpendicular to this.
If a straight line passing through (L ₁ , θ ₁ ) is taken as the Y-axis, each point (Li, θi)
Can be obtained as a point (xi, yi) by xi = L ₁ cosφ ₃ −Licos (θi + φ ₃ ) yi = L ₁ sinφ ₃ −Lisin (θi + φ ₃ ).

(Other Embodiments) In the embodiments described above, the collected data of each room is stored in the RAM 34 and is output to the external device 4 such as a personal computer via the SIO 35. And SIO35
Instead of this, a socket is connected to the bus drawn from the CPU 31, an IC card with a built-in memory IC is attached to this socket, and the collected data of each room is stored in this IC card.

When the data of all the rooms have been collected, the IC card is removed from the socket and the personal
It is also possible to connect to a computer or the like and read out and process the collected data.

In the above embodiments, an incremental encoder is used as the encoder 11, but an absolute encoder can be used if the measurement accuracy does not matter, and in that case a counter is used. It is not necessary to provide 36, and encoder 11 is directly PI
Connect to O32.

It is also possible to incorporate a small printer in the dimension measuring device and print the measurement result on the spot to output it.

[0033]

As is clear from the description based on the above embodiments, the room dimension measuring apparatus of the present invention is easy to carry and handle, requires no experience or skill, and is short for anyone. Accurately measure room dimensions in time.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a room dimension measuring apparatus of the present invention,

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

3 is a perspective view of a reflector used in combination with the laser rangefinder of the device shown in FIG. 1,

FIG. 4 is a flow chart showing the operation of the device of the present invention,

FIG. 5 is a plan view showing a situation in which the size of a room is measured by the device of the present invention.

[Explanation of symbols]

 1 rotary table 2 base table 11 rotary encoder 13 laser range finder 14 motor 16 optical signal receiving element 31 CPU 32 PIO 33 ROM 34 RAM (memory means) 36 counter

Claims (5)

[Claims] 1. A base, a rotary base rotatably mounted on the base, and an output corresponding to a rotation angle of the rotary base with respect to the base mounted on the rotary base. 1. A room size measuring device, comprising: a rotary encoder; and a laser range finder that is mounted on the rotary table and measures a distance to a reflector installed at a reference point. 2. A base, a rotary base rotatably mounted on the base, and a number of pulses mounted on the rotary base and proportional to a rotation angle of the rotary base with respect to the base. A rotary encoder that generates a pulse, a counter that counts the pulses output from the rotary encoder, and a laser rangefinder that is mounted on the rotary table and that measures the distance to a reflector installed at a reference point. , A storage means for storing the count value of the counter and the output of the laser rangefinder when the laser rangefinder is aimed at the reflector as angle data and distance data. Dimension measuring device. 3. The room size measuring apparatus according to claim 1, further comprising a motor that rotates a turntable during measurement. 4. The room size measuring apparatus according to claim 1, further comprising means for switching the rotation of the motor between high speed and low speed. 5. The room size measuring apparatus according to claim 1, wherein a removable IC card is used as the storage means.