JP2748211B2 - Room dimension measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the size of a tatami or a carpet which is used to determine the dimensions of a tatami or a carpet so as to fit the room when a new tatami mat or a carpet is laid. However, it is configured to be easy and convenient to carry.

[0002]

2. Description of the Related Art When tatami or rugs are laid in a room, the indicated area of the room is not always the same as the actual area of the room. Tatami and carpets were cut to fit the shape of the room.

[0003] The actual dimensions of a room are measured manually by means of a tape measure or a ruler, which requires experience and skill and requires a lot of time and labor. Moreover, the length can be measured accurately. However, it was difficult to accurately measure the angle of the corner.

[0004] 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 convenient to carry. In addition, the inventors of the present invention provide a base, a turntable rotatably mounted on the base, and a turntable mounted on the turntable and proportional to the rotation angle of the turntable with respect to the base. A rotary encoder that generates a specified number of pulses, and a linear encoder that is mounted on a turntable and generates a number of pulses proportional to the length of the extracted tape. A measuring device that obtains angle data and length data based on the count values of a rotary encoder and a linear encoder when the leading ends of the two are aligned has already been proposed as Japanese Patent Application No. 3-33521.

[0005]

However, in the measuring device proposed above, the tape is pulled out from the linear encoder in order to obtain length data, and the leading end of the tape is aligned with a reference point to be measured. At that time,
Although the angle data is obtained from the encoder, a load is applied since the turntable cannot rotate without resistance, and the direction of the turntable (the true pulling direction of the tape) does not exactly match the tip direction of the drawn tape. In particular, when the tape was pulled out for a long time, the angle data was incorrect.

Therefore, although it was difficult to obtain accurate angle data even though accurate length data could be obtained, the present invention was conceived to obtain accurate angle data.

[0007]

A base, a turntable rotatably mounted on the base, and mounted on the turntable,
A rotary encoder that detects the rotation angle of the turntable with respect to the base, and a linear encoder that is mounted on the turntable and detects the length of the pulled-out cord-like body, is mounted on the turntable, A laser light source that emits a visible laser beam in the direction of the turntable, and angle data and length data when the tip of the cord is aligned with a reference point to be measured that exists in the direction of the turntable are stored. Storage means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a room size measuring apparatus according to the present invention has a circular base 2 having three legs 21 and is rotatably mounted on the base 2 via a bearing 22. And a circular turntable 1 placed thereon, and a circular base 2
23 is fixed, and a motor 14 that meshes with the gear 23 and rotates the turntable 1 itself in any direction is fixed to the turntable 1.
An incremental rotary encoder 11 for detecting the rotation angle of the turntable 1; an incremental linear encoder 13 for detecting the length of the tape 17 pulled out; A laser light source 5 that emits a visible laser beam 15 in the true drawing direction), a circuit board 30 incorporating a signal processing circuit, and an optical signal receiving element
16 and a storage battery 19 for operating these devices as a whole are attached.

The rotary encoder 11 is a gear of the base 2
When the turntable 1 is rotated, it is rotated at an increased speed, and generates two-phase pulses in a number proportional to the rotation angle only during the rotation.

The linear encoder 13 winds the tape 17 by a spring, and when the tape 17 is pulled out or retracted, the number of two-phase tapes proportional to the amount of movement of the tape 17 only while the tape 17 is moving. Generate a pulse.

Further, a sensor 6 for detecting the pulling-out direction of the tape 17 is provided at the tape pulling-out opening of the linear encoder 13. This sensor 6, as shown in detail in FIG.
Two micro switches 61 and 62 sandwiching the tape 17
When the pull-out direction of the tape 17 changes and one of the micro switches is actuated, the motor 14 is rotated forward or reverse to actuate the rotary switch 1 itself. And a servo system for rotating the motor. It should be noted that other proximity detecting means can be used instead of the micro switch.

A laser beam 15 emitted from the laser light source 5
Is the direction corresponding to the direction in which the tape 17 is pulled out from the linear encoder 13, and this direction is
Directional direction.

As shown in FIG. 2, the signal processing circuit includes a CPU 31 for controlling the entire apparatus, a first up / down counter 36 for counting two-phase pulses generated from the rotary encoder 11, and a linear A second up / down counter 37 for counting two-phase pulses generated from the encoder 13, and the count values of these two counters 36, 37, the output of the sensor 6 and the output of the optical signal light receiving element 16 are input to the CPU 31. Further, it comprises a PIO 32 for controlling the motor 14, a ROM 33 for storing a processing program, a RAM 34 for temporarily storing data, and an SIO 35 for exchanging data with the external device 4.

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

Next, a procedure for measuring the size of a room by the apparatus of the embodiment configured as described above will be described with reference to the flow chart shown in FIG.
Explanation will be made based on the chart.

First, as shown in FIG. 5, the measuring device A is installed substantially at the center of the room.

(Step 1) By operating the remote controller,
The signal of “initial setting” is transmitted to the optical signal
The count values of the two up / down counters 36 and 37 are initialized to zero.

(Step 2) When the tape 17 is pulled out from the linear encoder 13 and its tip 18 is swung right and left, the direction of the shaking is detected by the sensor 6, the motor 14 is controlled, and the turntable 1 Rotate in the direction of shaking. At this time, since the visible laser beam 15 is emitted from the laser light source 5 to the floor and the wall surface, the turntable 1 is turned so that the visible laser beam 15 is directed to a corner or a reference point of the room.
To rotate.

When the leading end 18 of the drawn tape 17 is aligned with a corner or a reference point of the room where the visible laser beam 15 is directed, the turntable 1 generated from the rotary encoder 11 and the rotary table 11 during the time until the alignment are performed. The number of two-phase pulses proportional to the rotation angle relative to the base 2 is increased / decreased.
The up / down counter 37 counts the number of two-phase pulses proportional to the amount of movement of the tape 17 generated by the linear encoder 13.

After the tip 18 of the tape 17 is accurately aligned with the corner or reference point of the room where the visible laser beam 15 is directed, the signal of “measurement” is transmitted to the optical signal receiving element 16 by operating the remote controller. Send to.

(Step 3) When the "measurement" signal is received by the optical signal light receiving element 16 and transmitted to the CPU 31, (step 4) each data of the count values of the two counters 36 and 37 at that time is read.

(Step 5) The operations of Steps 2 and 3 are
Do this for every corner or reference point in the room. At this time, if the signal of “measurement” is transmitted by mistake, the remote control device is operated to transmit the signal of “cancel” to the optical signal light receiving element 16, and the signal is received by the optical signal light receiving element 16. Then, (step 6) the previous data is deleted.

(Step 7) When data collection at all corners or reference points is completed, the remote control device is operated to transmit a “completion” signal to the optical signal light receiving element 16.

(Step 8) When the signal of "completion" is received by the optical signal light receiving element 16, a serial number is added to the head or end of a series of measured data and stored in the RAM 34.

The operations of steps 1 to 8 are executed in each room to be measured, and data of each room is collected in the RAM 34.

The measuring device A is connected to an external device 4 such as a personal computer via an SIO 35, and each data stored in the RAM 34 is read out for each room. Perform

The data stored in the RAM 34 is polar coordinate data centered on the place where the measuring device A is installed. As shown in FIG. 5, the size of each side L _{1 to} Ln,
Since the included angles θ _{2 to} θ n (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)
Can be obtained by ^{_{Si = {L 1 2 + Li}} 2 -2L 1 · Li · cosθi} 1/2,

Further, unknown included angle φi between L ₁ and Si in triangle made by L _1, Li and ^{_{Si, cosφi = (L 1 2 +}} Si 2 -Li 2) / from (2L ₁ · Si) it can be determined by _{^{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.

Further, in the case of expressing by converting to the 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,
When a straight line passing through (L ₁ , θ ₁ ) is taken on the Y axis, each point (Li, θi)
It can be determined by the point (xi, yi) _{as, xi = L 1 cosφ 3 -Licos} (θi + φ 3) yi = L 1 sinφ 3 -Lisin (θi + φ 3).

(Other Embodiments) In the embodiment described above, the collected data of each room is stored in the RAM 34,
The data is output to an external device 4 such as a personal computer via the SIO 35, but as shown in FIG.
Instead of the SIO 35 and the SIO 35, a socket 39 is connected to a bus drawn from the CPU 31 and the memory 39 is connected to the socket 39.
An IC card 38 with a built-in C 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 detached from the socket 39, connected to a personal computer or the like, and the collected data can be transferred and processed.

Further, as shown in FIG. 2, 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 printer at the measurement site. You can know the polar coordinate data.

If the measured polar coordinate data is converted to the XY coordinate system by the CPU 31, the data converted to the XY coordinate system by the printer 7 can be printed.

[0034] The printed output is obtained by expressing each measurement point in the XY coordinate system with the reference point as the origin. In this way, it is possible to output a standard size determined as a standard of the size, and to print data expressed by a deviation value from the standard size.

In each of the above embodiments, the encoder 1
Although an incremental encoder is used as 1 and 13, an absolute encoder may be used. In this case, there is no need to provide two counters 36 and 37, and the absolute encoder is directly connected to the PIO32.
Just connect to it.

Further, a sensor 6 for detecting the drawing direction of the tape 17 is provided at the tape drawing outlet of the linear encoder 13, and the turntable 1 is rotated so as to follow a change in the drawing direction of the tape 17. Since it has a servo system, tape 17
The turntable 1 can be smoothly turned without applying a turning load to the rotary table. As described above, since a rotational load is not applied to the tape 17, a flexible string-like body such as a wire may be used instead of the tape.

Further, it is also possible to transmit forward / reverse "high speed", "low speed", and "inching" from the remote controller to the optical signal light receiving element 16, and control the motor 14 by the signal.

[0038]

As is clear from the description based on the above embodiment, the room size measuring apparatus of the present invention is easy to carry, and requires no experience or skill, so that anyone can measure the room size in a short time. Can be measured accurately.

In particular, measurement of angle data is performed by emitting a visible laser beam 15 in the directing direction of the turntable (the true drawing direction of the string) and aligning the tip of the string with the visible laser beam 15. Accurate angle data can be obtained by significantly reducing errors.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a room size measuring apparatus according to the present invention;

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

FIG. 3 is a plan view of a main part of the apparatus shown in FIG. 1,

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

FIG. 5 is a plan view showing a situation where a room size is measured by the apparatus of the present invention;

FIG. 6 is a block diagram showing a circuit of another embodiment of the device of the present invention.

[Explanation of symbols]

 Reference Signs List 1 turntable 2 base 5 laser light source 6 sensor 7 printer 11 rotary encoder 13 linear encoder 14 motor 15 laser beam 16 optical signal light receiving element 17 string 31 CPU 32 PIO 33 ROM 34 RAM (storage means) 36, 37 Up / down counter 38 IC card 39 socket

Continuation of the front page (56) References Japanese Utility Model Showa 58-154407 (JP, U) Japanese Utility Model Showa 63-73607 (JP, U)

Claims (5)

(57) [Claims] 1. A base, a turntable rotatably mounted on the base, and a rotary encoder mounted on the turntable for detecting a rotation angle of the turntable with respect to the base. A linear encoder mounted on the turntable and detecting the length of the pulled-out string, and a laser mounted on the turntable and emitting a visible laser beam in the direction of the turntable A room size, comprising: a light source; and storage means for storing angle data and length data when the tip of the string is aligned with a reference point to be measured existing in the directing direction. measuring device. A first counter for counting pulses output from the rotary encoder; and a second counter for counting pulses output from the linear encoder, wherein the first and second counters are provided. 2. The room size measuring apparatus according to claim 1, wherein the storage unit stores the counted value of the angle as angle data and length data in the storage unit. 3. A servo system comprising: a motor for rotating the turntable with respect to the base; and means for detecting a pull-out direction of the string-like body, wherein a servo system for turning the turntable in the pull-out direction of the string-like body is provided. The room size measuring apparatus according to claim 1, further comprising: 4. The room size measuring apparatus according to claim 1, wherein a removable IC card is used as the storage means. 5. The room size measuring apparatus according to claim 1, further comprising a printer for printing the collected data.