JPH08285542A - Steel tape measure reader - Google Patents

Abstract

PURPOSE: To eliminate the problem of reading error of a scale and the personal difference in reading the middle value of the scale by correcting the pulses generated in a rotary encoder by a tape traveling in a pulse length measuring equipment by pulses generated from a photo sensor by the marker of a tape. CONSTITUTION: The amount of travel of a tape 3A of a steel tape measure is transferred as the number of rotations of rollers 8 and 9, and a rotary encoder 10 is rotated by the gear of the shaft edge of the rotary encoder 10 which us engaged with the gear fixed to the axial edge of the roller 9. Two types of pulses with a phase difference are generated by the rotation of the rotary encoder 10 and the pulses are transferred from a pulse length measuring meter to a computer by a transfer cable 5A. The computer judges the traveling direction of the tape 3A from the phase difference of the pulses, adds and subtracts pulses by a counter, calculates the traveling distance of the tape 3A from a measurement zero point, and then digitally displays the length scale of the tape 3A to be measured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to provide a steel tape measure reader which is used for measuring the dimensions of steel structures such as building steel frames and is suitable for inspecting the accuracy of products and controlling the quality of factories. To do.

[0002]

2. Description of the Related Art Conventionally, the work of this kind has been as follows. 1) Using a tape measure made of steel, manually measure it visually. 2) Make a note of the measurement results in a field notebook, and organize data and prepare documents at the office.

[0003]

However, the conventional technique has the following problems. 1) Since the measurement is performed visually, there is a possibility that the scale may be misread, and there may be individual differences in the reading of intermediate values on the scale. 2) In order to organize data and create documents manually from the field notebook,
It takes a lot of time and may cause a calculation error in the manual calculation stage. 3) The product accuracy is only checked, and the product accuracy cannot be statistically grasped, and the data is not fully utilized for quality control.

According to the present invention, an extremely inexpensive digital length measuring system is realized, and the measured numerical values can be stored in a memory together with a symbol indicating an inspection site, and these data are transferred to a computer for inspection. The purpose of this report is to solve all the problems in the past by providing a product that can produce a certificate and other data analysis necessary for quality control.

[0005]

In order to achieve the above object, the present invention is as follows. That is, the present invention comprises a pulse length measuring device 2, a steel tape measure 3, and a pulse length measuring device 4, and the pulse length measuring device 2 is moved up and down by moving the tape 3A on the steel tape measure 3 in the measuring direction. Roller 8 and 9, a rotary encoder 10 that interlocks with the lower roller 9, an optical sensor 11 and the like, and the tape 3A can be mounted at any position on the tape. 3B is provided, and the pulse length measuring device 4 measures the measurement size while correcting the pulse generated by the rotary encoder by the tape 3A moving in the pulse length measuring device 2 by the pulse generated by the optical sensor by the marker 3B of the tape 3A. Steel tape measure read configured to calculate, store with part number and code, and transfer data to computer It is. This will be described in more detail by the following devices. 1) Pulse length measuring device 2) Pulse length measuring device 3) Steel tape measure The pulse length measuring device and the pulse length measuring device are connected by a transfer cable, and the signal of the pulse length measuring device is transferred to the pulse length measuring device. A steel tape measure is used by incorporating the tape into a pulse length measuring device.

Next, the principle and configuration of the dimension measurement according to the present invention will be described. The tape of the steel tape measure incorporated in the pulse length measuring device is sandwiched by a pair of upper and lower rotatable rollers, and the roller rotates as the tape moves in the measuring direction in the pulse length measuring device. In order to prevent slipping between the tape and the roller, the bracket supporting the lower roller is configured to press the tape with a compression coil spring. Equipped with a rotary encoder close to the upper roller, its shaft end,
Gears are fixed and meshed with the shaft ends of the upper rollers. With this configuration, the rotation of the roller is transmitted to the rotary encoder.

The rotary encoder generates two types of pulses, A and B, having a mutual phase difference for each fixed rotation angle. This pulse is transferred to the pulse length meter. With the pulse length meter, the tape moving direction is judged from the phase difference between the pulses A and B, the A pulse is added or subtracted by the counter, the tape moving distance from the measurement origin is calculated, and the tape length to be measured is calculated. It is configured to digitally display the scale. This processing system is called a "pulse generation system".

In the process of counting pulses at high speed, there is a possibility that a measurement error may occur due to a counting error due to the influence of various noises or other causes, and the error accumulates as the measurement distance increases. Become. In order to prevent such inconvenience, the present invention has the following configuration. Markers with small holes are provided at regular intervals on the tape of a steel tape measure, while the pulse length measuring device is equipped with optical sensors corresponding to the positions where the markers pass. One marker on the tape
One pulse is generated when passing through the optical sensor. On the other hand, the pulse length measuring device is equipped with an optical sensor corresponding to the position where the marker passes. When one of the markers on the tape passes the photosensor, it produces one pulse.

At first, the tape marker is provided at a position corresponding to the distance from the 0 point of the tape of the steel tape measure to the detection point of the optical sensor from the measurement surface at the tip of the pulse length measuring device. For example, they are arranged at a constant pitch such as every 1 m (meter). Hereinafter, description will be given assuming that the markers are arranged every 1 m. Each time the optical sensor detects the marker, one pulse is generated. At this time, the error of the numerical value accumulated from the pulse generation system is canceled, that is, a new reference value is set every 1 m, Measurement accuracy can be maintained. As a result, the moving distance (positive or negative) within the reference scale (an integral multiple of 1 m) +1 m is displayed on the display unit of the pulse length meter as a measured value. This 1 m pulse is called a "correction pulse", and this processing system is called an "origin correction system".

The taper start point (0 point) at one end of the length to be measured
And the tip of the pulse measuring device is aligned with the other end, the dimensions are digitally displayed on the pulse length meter. When the push button of the pulse measuring instrument is pressed, the displayed value is fixed (called measurement value hold) and it is possible to read even if the measuring instrument is moved. When the push button is pressed again, the hold is released, the scale of the tape on which the measuring instrument is located at that time is displayed, and repeated measurement can be performed. This processing system is called a "display switching system".

To attach and detach the tape of the steel tape measure to and from the pulse length measuring instrument, a lever which is provided in the pulse length measuring instrument is operated to open a gap through which the tape passes by a body sliding mechanism, so that the tape can be placed at any position of the tape. It is configured so that it can be easily attached and detached. Set the tape in the direction of measurement and return the lever to its original position to close the gap, and the tape will be clamped by the rollers, ready for work.

Next, the function of each key of the operation key unit equipped in the pulse length meter will be described. a) CAL mode In this mode, the unit length per pulse, which is the basis of distance calculation, is calculated, and the [Mode Select? ], And press the [CAL] key to execute. [CAL]
After pressing the key, move the tape that has passed through the pulse length measuring device, and start counting the pulses at the first marker.
Counting is terminated at the next marker at a distance of m, and the unit length per pulse is displayed. The calculated unit length is registered with the [Enter] key, and it is saved even if the power is turned off. The unit length is, for example, about 0.1 mm.

B) Standard Mode A steel tape measure is usually used for measuring the length of columns, floor heights, and lengths of beams, and the values range from about 3 m to a dozen meters. When measuring these, if the reference is always 0 m, the workability is not good. The reference mode is provided to eliminate this problem, and is a mode that allows measurement to be started from any position on the tape measure,
When you press the [Reference] key, the message [Kijun Nagasa? ] Message appears, enter the reference value in 1m units,
The reference value is registered with the [Enter] key. At the start of measurement, the tape scale is digitally displayed from the time when the tip of the pulse measuring instrument is passed through the registered distance scale position. Input the reference value by pressing the [↑] [↓] keys.

C) Measurement mode In the mode for measuring the dimensions of the object to be measured, the [Measure] key is pressed to execute, and the member number is input first. To enter a column or beam member number in full, many input keys are required, and a time member number is input. Since a large number of input keys are required to fully input the column or beam member numbers, it is expected that the inspection efficiency will be deteriorated in time, so in the present invention, the member numbers (01 to 99) are input. However, the member symbol corresponding to the number is recorded in a memo and written in the process of being processed by a computer. Enter the member number by pressing the [↑] [↓] keys at the tenth digit and ones digit. Use the [→] [←] keys to move the digit. Next, enter the measurement site code. It was decided to use a three-digit code including the number of floors and direction for the seven items considered to be the most important regarding the dimensions of the building steel frame. The measurement data is stored as a code, but when it is transferred to a computer and a gradebook is created, it is automatically written in the corresponding column.

D) Memory mode When [Memory] is pressed while the measured value is held, the measured value is stored in the built-in ram together with the member number and code. There is a capacity to store up to 1000 measurement results, which is sufficient to store the usual daily inspection amount. In addition, when the memory mode is executed, the remaining capacity is displayed for convenience of use. To erase the memory contents, you must press [Clear] key after [Memory], confirm that there is no mistake, and then press the [Enter] key. Double-click to avoid losing the memory contents by mistake. Check is adopted.

E) Transfer mode In this mode, the measurement results stored in the memory are transferred to the computer. The pulse length meter and the computer are connected by a cable, and the [Transfer] key is pressed. It is executed by pressing the [Enter] key according to the confirmation message displayed. The [Stop] key interrupts the transfer mode, and the mode is selected. For data transfer, RS232C or the like is used so as to suit a general personal computer. The completion of transfer can be confirmed by a message display, but if a transfer error occurs for some reason, "Tensorship" is displayed and a warning is issued, and software that promotes retransfer is installed. The pulse length measuring instrument has an alarm function for warning a drop in the power supply voltage, and is small and lightweight, but has the performance required for dimensional accuracy inspection.

[0017]

The operation of the present invention will be described below with reference to the reference numerals in the drawings, if necessary. When using the steel tape measure reader of the present invention, first, the tape 3A of the steel tape measure 3 provided with the above-mentioned marker is incorporated into the pulse length measuring device 2. When the lever 7 mounted on the side surface of the body 2A of the pulse length measuring device is rotated, the eccentric shaft 7B at the tip of the shaft 7A fixed to the lever rotates, so that a ball bearing held by the eccentric shaft, etc. The roller 19 by means of pushes up the upper surface of the groove 2E of the body 2C which is fitted.
The body 2C is fixed to the other body 2B,
On the other hand, the body 2A is guided by the guides 17 and 18 and configured to be slidable in the vertical direction in parallel with the body 2C, so that the reaction force of the force pushing up the body 2C causes
Since the body 2A is pushed down, a gap is formed between the upper surface of the body 2A and the upper body 2B, and the tape 3A is inserted into a predetermined position, that is, the tape accommodating groove 2G provided on the upper surface of the body 2A. can do. When the tape 3A is inserted, returning the lever 7 to the original position closes the gap, and the tape is clamped between the rollers 8 and 9,
Pressed and ready for work.

The amount of movement of the tape is transmitted as the number of rotations of the rollers 8 and 9, and the gear 1 fixed to the shaft end of the roller 9.
From 2, the rotary encoder is rotated via the gear 13 at the shaft end of the rotary encoder which meshes with the rotary encoder. The rotation of the rotary encoder generates two types of pulses, A and B, which have a phase difference with each other. These pulses are transferred to the pulse length meter by the transfer cable, and the phase difference between the pulses A and B causes the tape movement direction to change. Then, the A pulse is added or subtracted by the counter, the moving distance of the tape from the measurement origin is calculated, and the length scale of the tape to be measured is digitally displayed.

In the process of counting pulses, in order to prevent a count error from occurring due to various noises or other causes to cause an error in measured numerical values, a tape of a steel tape measure is Markers with minute holes are provided at intervals of 1 m, and an optical sensor is installed in correspondence with the position where the marker in the pulse length measuring instrument passes. When one of the markers passes the optical sensor, one pulse is output. To occur. With this pulse, the error of the numerical value accumulated by the pulse generated from the rotary encoder is canceled, a new reference value is set every 1 m, and the measurement accuracy is maintained. The spacing between the markers can be set to another dimension.

Next, the procedure of the measuring work will be described.
First, press the [Reference] key of the pulse length meter connected to the pulse length measuring instrument with a cable, and enter the reference length in 1m units according to the length of the DUT in accordance with the message [Kijun Nagasa]. , By pressing the [Enter] key, the reference value is registered. For example, when measuring a length of about 5 m, register 5 m as a reference value. next,
Press the [Measure] key and enter the code of the DUT.
The code consists of a 2-digit member number and a 3-digit measurement site code. When you enter the code and press the [Enter] key, the code is displayed and [START] is displayed.
Is displayed and measurement is possible. In this state, the tape origin (0 point) of the steel tape measure is aligned with one end of the measured object, and the tip of the pulse length measuring device is applied to the other end for measurement. As mentioned above, when 5m is used as the standard value, 5m
The numerical value obtained by increasing or decreasing the fraction read by the pulse generated by the rotary encoder is displayed as the measured value.

When the push button of the pulse length measuring device is pushed, the displayed value is held (fixed), and the reading can be made even if the measuring device is moved. Pressing the button again releases the hold, displays the scale of the tape on which the measuring instrument is located at that time, and enables repeated measurement.

[Memory] with the measured value held
When is pressed, the measured value is stored in the built-in ram together with the member number and code. Since the present invention can store up to 1000 pieces, it is sufficient to store the usual daily inspection amount. Also, when the memory mode is executed, the remaining capacity is displayed, so check the capacity. You can To erase the memory contents, you must press the [Memory] and then the [Clear] key, check that there are no mistakes, and then press the [Enter] key. It is configured.

To transfer the measurement result stored in the memory to the computer, connect the pulse length meter and the computer with a cable such as RS232C and press the [Transfer] key.
It is executed by pressing the [Enter] key according to the display of the message requesting confirmation. The completion of transfer can be confirmed by displaying the message, but if a transfer error occurs, a warning will be issued with the message [Tensorship] and the software will be built to prompt the transfer again. In addition, it has an alarm function that issues a warning when the power supply voltage drops.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a steel tape measure reader of the present invention. 2 shows the entire pulse length measuring device. Reference numeral 3 is a steel tape measure, and the tape 3A is provided with markers 3B having minute holes or the like at regular intervals. Reference numeral 4 represents the entire pulse length meter. A transfer cable 5A transfers the signal generated by the pulse length measuring device 2 to the pulse length measuring device 4. A transfer cable 5B transfers the data of the pulse length measuring device 4 to the computer.

2A, 2B and 2C are bodies forming the main body of the pulse length measuring device. Body 2B and Body 2C
Are fixed to each other by screws (not shown). The body 2A is arranged below the body 2B, and its side surface is arranged so as to contact the side surface of the body 2C. The body 2A is configured to be able to move in parallel to some extent in the vertical direction by guides 17 and 18 such as a slide key. Then, through the elongated hole 2F provided in the body 2C, the compression coil spring 22 is connected, and the adjusting screw 21 is connected so that the pressing force can be adjusted. Reference numeral 2D is a cover for protecting the mechanical portion on the side surface of the body 2C.
It is fixed with respect to C.

Reference numeral 8 is a rotatable roller, and its shaft 8
A is supported by the bracket 8B. Bracket 8B
Is a spring holder 15 fixed to the body 2A with a screw 16.
Is pressed upward by the compression coil spring 14 provided on the upper side. Reference numeral 9 denotes a rotatable roller, which is arranged corresponding to the position of the roller 8, and its shaft 9A has one end supported by the body 2B and the other end supported by the body 2C. A gear 12 is fixed to the shaft end of the roller 9.

A rotary encoder 10 is provided close to the roller 9 and is fixed to the body 2C. A gear 13 is fixed to the end of the shaft 10A of the rotary encoder and meshes with the gear 12. With this configuration, when the roller 9 rotates, the gears 12, 1
The shaft 10A of the rotary encoder is rotated via 3. Each time the shaft 10A of the rotary encoder rotates by a predetermined angle, two types of pulses A and B having a mutual phase difference are generated and transferred to the pulse length meter 4.
An optical sensor 11 is fixed to the body 2C. The optical sensor 11 generates one pulse (correction pulse P) each time the steel tape measure marker 3B passing therethrough is detected and transfers it to the pulse length meter 4.

Reference numeral 6 denotes a push button provided on the lower surface of the body 2A of the pulse length measuring device. By pushing this button, the display of the liquid crystal display portion 4B of the pulse length measuring device 4 is fixed or released (real display). It has a function of switching.

Reference numeral 7 is an opening / closing lever which is operated to open a gap between the lower surface of the body 2B and the upper surface of the body 2A when the tape 3A of the steel tape measure 3 is attached to and detached from the pulse length measuring device 2. A roller 19 such as a ball bearing, which is rotatably mounted on an eccentric shaft 7B at the tip of the opening / closing lever shaft 7A, is fitted into a horizontally long groove 2E provided on the body 2C. It is held by the leaf spring 20. 2G
Is a groove for accommodating the tape 3A, and is provided over the entire length of the pulse length measuring device 2. 2H is a gap when the tape 3A is attached and detached, and the gap 2H is opened by turning the opening / closing lever 7 downward, so that the tape can be attached and detached.

Next, the structure of the pulse length meter 4 will be described. The power source of the pulse length measuring device 4 is secured by a built-in dry battery. 4A is a power switch, and 4B is a liquid crystal display unit. Reference numeral 4C denotes an operation key unit, which is composed of the following 12 keys. The [CAL] key is a key for obtaining the unit length per pulse, and when the value is measured once and the [Enter] key is pressed, the value is retained even if the power is turned off. The numerical value is, for example, 0.10098 mm
And so on. The [reference] key is pressed when the reference length is determined in units of 1 m according to the length of the measured object M, and the reference length is input. Next, when the [Enter] key is pressed, the reference length is registered. The [Measure] key is pressed when measuring the length of the measured object M. First, the member number and code are input, and then the [Enter] key is pressed, so that the length can be measured. is there. The [Memory] key
This is pressed when the measured value is stored in the built-in ram together with the measured member number and code of the measured object M. The [Clear] key is pressed to erase the memory. The [transfer] key is pressed when the measurement result stored in the memory is transferred to the computer by the transfer cable 5B. The [Stop] key is pressed when the transfer to the computer is interrupted.

The [↑] and [↓] keys are keys for selecting a numerical value by pressing when determining the reference length by operating the [Reference] key, and also by operating the [Measure] key. It is used when inputting the member number of the measuring object M, and when inputting the tenth digit and the first digit. The [→] and [←] keys are used when the digit of the member number of the measured object M is moved by operating the [Measure] key. In the figure, S is a push button signal, E is a measurement zero point, and L is a measurement length.

[0032]

Since the present invention is configured as described above, it has the following effects. 1) The measured values are displayed digitally, not visually, so
It is possible to completely prevent inconveniences such as erroneous reading of the scale and individual differences in reading the intermediate value of the scale. 2) The amount of movement of the tape 3A from the measurement 0 point is read as the number of pulses generated by the rotation of the rotary encoder 10, and the optical sensor 11 detects that one marker 3B is provided for each 1m on the tape 3A and that one marker is provided. By generating the correction pulse P, the rotary encoder 1
Since it is configured to correct the error of the generated pulse due to 0, the error is not accumulated and the measurement can be performed with extremely high accuracy.

3) A tape measure used for measurement is commercially available JIS1.
Since it can be used only by processing the marker 3B on the tape of a grade steel tape, the cost can be kept extremely low. 4) Since the tape 3A can be easily attached to and detached from the pulse length measuring device 2 by operating the opening / closing lever 7, the preparation for measurement can be easily performed. 5) Since the measured value is recorded as a digital value, the measured value is stored together with the member number and code of the object to be measured and transferred to a computer by RS232C or the like,
It is possible to perform the following processing. a) Preparation of inspection report b) Calculation of frequency distribution and standard deviation of product accuracy c) Manufacturing process, significant difference test by line d) Confirmation of process improvement, etc. 6) Factory automation using computer is possible. Therefore, it is possible to reduce the cost by saving labor for data organization. 7) Due to quality control activities, more detailed data analysis has become possible. As described above, the present invention brings about great progress in precision inspection and quality control of products of steel structures, and makes a great contribution to the development of the industry.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an entire steel tape measure reader.

FIG. 2 is a system diagram showing a signal flow.

FIG. 3 is a side cross-sectional view showing the relationship between the main part of the pulse length measuring instrument and a steel tape measure.

FIG. 4 is a plan sectional view showing a main part of a pulse length measuring device and a steel tape measure.

5 is a transverse cross-sectional view of the pulse length measuring device showing the cross section CC in FIG. 3;

FIG. 6 is a transverse cross-sectional view of the pulse length measuring device showing a cross section DD of FIG.

FIG. 7 is a side view of the pulse length measuring device showing a tape attaching / detaching mechanism in a partial cross section.

8 is a transverse cross-sectional view of the pulse length measuring device showing a cross section taken along line JJ of FIG. 7. FIG.

FIG. 9 is a side view of the pulse length measuring device showing the tape attaching / detaching mechanism in a partial cross section.

FIG. 10 is a transverse cross-sectional view of the pulse length measuring device showing the KK cross section of FIG. 9;

FIG. 11 is a side cross-sectional view of a part of the pulse length measuring device showing a main part of the tape attaching / detaching mechanism.

FIG. 12 is a front view showing the configuration of a pulse length meter.

[Explanation of symbols]

 1 Steel tape measure reader 2 Pulse length measuring device 2A, 2B, 2C Body 2D Cover 2E Groove 2F Oblong hole 2G Tape accommodating groove 2H Tape attaching / detaching gap 3 Steel tape measure 3A Tape 3B Marker 4 Pulse length measuring instrument 4A Power switch 4B Liquid crystal display Part 4C Operation key part 5A, 5B Transfer cable 6 Push button 7 Open / close lever 7A Axis 7B Eccentric shaft 8 Roller 8A Axis 8B Bracket 9 Roller 9A Axis 10 Rotary encoder 10A Axis 11 Optical sensor 12, 13 Gear 14 Compression coil spring 15 Spring receiver 16 Screws 17, 18 Guides 19 Rollers 20 Leaf springs 21 Adjustment screws 22 Compression coil springs 23 Screws A, B Pulses P Correction pulses S Pushbutton signals M Measured object E Measurement 0 point L Measurement length

[Procedure amendment]

[Submission date] June 6, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005]

In order to achieve the above object, the present invention is as follows. That is, the present invention comprises a pulse length measuring device 2, a steel tape measure 3, and a pulse length measuring device 4, and the pulse length measuring device 2 is moved up and down by moving the tape 3A on the steel tape measure 3 in the measuring direction. The rollers 9 and 8 and the rotary encoder 10 interlocking with the upper roller 9 and the optical sensor 11 and the like, and the tape 3A can be mounted at any position on the tape. 3B is provided, and the pulse length measuring device 4 measures the measurement size while correcting the pulse generated by the rotary encoder by the tape 3A moving in the pulse length measuring device 2 by the pulse generated by the optical sensor by the marker 3B of the tape 3A. calculated, member number, along with code, and memory, and reading the steel measuring tape and adapted to transfer data into competent <br/>-menu data It is a vessel. This will be described in more detail by the following devices. 1) Pulse length measuring device 2) Pulse length measuring device 3) Steel tape measure The pulse length measuring device and the pulse length measuring device are connected by a transfer cable, and the signal of the pulse length measuring device is transferred to the pulse length measuring device. A steel tape measure is used by incorporating the tape into a pulse length measuring device.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

In the process of counting pulses at high speed, there is a possibility that a measurement error may occur due to a counting error due to the influence of various noises or other causes, and the error accumulates as the measurement distance increases. Become. In order to prevent such inconvenience, the present invention has the following configuration. Markers with small holes are provided at regular intervals on the tape of a steel tape measure, while the pulse length measuring device is equipped with optical sensors corresponding to the positions where the markers pass. One marker on the tape
One pulse is generated when passing through the optical sensor.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

C) Measurement mode In the mode for measuring the dimensions of the object to be measured, the [Measure] key is pressed to execute, and the member number is input first. Since a large number of input keys are required to fully input the column or beam member numbers, it is expected that the inspection efficiency will be deteriorated in time, so in the present invention, the member numbers (01 to 99) are input. However, the member symbol corresponding to the number is recorded in a memo and written in the process of being processed by a computer. Enter the member number by pressing the [↑] [↓] keys at the tenth digit and ones digit. Use the [→] [←] keys to move the digit. Next, enter the measurement site code. 7 items, including the number of floors and direction, which are considered to be the most important regarding the dimensions of the building steel frame
We decided to use a digit code. The measurement data is stored as a code, but when it is transferred to a computer and a gradebook is created, it is automatically written in the corresponding column.

Claims (1)

[Claims] 1. A pulse length measuring device (2), a steel tape measure (3),
It consists of a pulse length meter (4) and a pulse length meter (2)
Is the upper and lower rollers (8, 8) that are actuated by moving the tape (3A) on the steel tape (3) in the measuring direction.
9), a rotary encoder (10) that interlocks with the lower roller (9), an optical sensor (11), and the like, and the tape (3A) can be mounted at any position on the tape. The tape (3A) is provided with a marker (3B), and the pulse length meter (4) uses the tape (3A) moving in the pulse length measuring device (2) to generate a pulse generated by a rotary encoder.
Steel tape measure reading, characterized in that the measurement dimensions are calculated while being corrected by the pulse generated by the optical sensor by the marker (3B), and the data is stored in memory together with the member number and code and the data is transferred to the computer. vessel.