KR20170136784A - Smart measuring tape using pattern recognition and operating method thereof - Google Patents

Abstract

The present invention relates to a smart tape measure using pattern recognition, an operation method thereof, and a terminal operable in conjunction with the smart tape measure. The operation method of the smart tape measure using pattern recognition comprises: radiating light to a pattern displayed in one direction using a plurality of colors having different light reflectance values, and recognizing the pattern using an amount of light reflected from the pattern; and measuring a length of a measurement object using the pattern recognized in accordance with movement of a strap in the direction on which the pattern is displayed. According to the present invention, the smart tape measure is light and small-sized like a conventional analog tape measure; measures a length and circumference of the measurement object with high accuracy by minimizing an error which may occur during digital measurement; and transmits measurement data to a server or terminal such that the length measurement data is able to be utilized in various application services.

Description

TECHNICAL FIELD [0001] The present invention relates to a smart tape measure using pattern recognition,

The present invention relates to a digital tape measure using pattern recognition, and more particularly, to a digital tape measure using a pattern recognition method capable of measuring a length using a pattern formed on a tape measure, and transmitting the measured length data to a terminal or a server .

In recent years, a digital tape measure with various functions has been developed in addition to an ordinary tape measure in which an individual measures a tape measure directly by reading the tape measure.

Conventional digital tape measure is disclosed in Japanese Laid Open Patent Application (JP 1997-005036 A, 'Detector and detector of digital display length measuring instrument') or Korean Patent Publication (KR 10-2003-0021812, 'PC connected digital scales and digital tape measure A technique of using an optical encoder system that detects a movement of a strap by detecting a light passing through a slit through an optical element is developed.

The digital tape measure using this method has disadvantages in that the volume of the tape measure is increased because the light receiving sensor for detecting the light passing through the slit and the light emitting device around the strap must be disposed above and below the strap. Further, due to the characteristics of the tape measure for measuring the dimension, the slit included in the strip needs to pass between the light emitting portion and the light receiving portion in a precise manner, so that the error is reduced, and therefore, a roller for moving the strip at a fixed position is required. As a result, the disadvantage is that the unit price is increased due to a large number of parts, and the usability required for measurement of clothes or body dimensions with a heavy weight can not be satisfied.

As a completely different form of smart tape measure, it also developed a device capable of measuring the length of an object using a laser, such as a Korean patent (KR 10-2016-0017991 A, a mobile terminal with a smart tape measure and a method for measuring the object length thereof) However, this is only applicable to the measurement of the straight line distance, so it is not suitable for the measurement of the body size in which the curve such as the waist circumference should be measured.

In addition, due to the development of wireless communication technology, small-sized devices are also being converted into digital convergence, and information collected through a measuring device such as tape measure can be utilized in customized health care services and customized shopping services Information. Nevertheless, there is no smart tape measure that provides an intuitive interface and has high usability and high accuracy, making it difficult to provide related services.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a smart tape measure using a pattern recognition with a high accuracy by minimizing an error that may occur in digital measurement while having a light and small size, The present invention has been made in view of the above problems.

It is also an object of the present invention to provide a smart tape measure using pattern recognition that enables measurement length data to be utilized in various application services by transmitting measured data to a server or a terminal, and an operation method thereof.

Another object of the present invention is to provide a smart tape measure using a pattern recognition that allows a user to intuitively recognize a measured value by a measurement subject and a method of operating the terminal in cooperation with the smart tape measure.

According to another aspect of the present invention, there is provided a method of operating a smart tape measure using pattern recognition, comprising the steps of: irradiating light onto a pattern displayed along one direction using a plurality of colors having different reflectances of light; Recognizing the pattern using a light amount, and measuring the length of the measurement target using the pattern recognized according to the movement of the strap in one direction of the displayed pattern.

According to another aspect of the present invention, there is provided a smart tape measure, comprising: a strap having patterns formed by using a plurality of colors having different reflectances of light in one direction; a housing in which the strap is inserted into and out of the strap so that the pattern is variably exposed; And a controller for measuring the length of the measurement target using the pattern recognized in accordance with the movement of the strap in one direction. .

According to another aspect of the present invention, there is provided a method of operating a terminal capable of interlocking with a smart tape measure using pattern recognition, the method comprising the steps of: displaying one or more measurement targets; activating and displaying a first measurement target to be measured using the smart tape measure; Receiving the first length data from the tape measure, associating the length data with the first measurement target, and activating and displaying the second measurement target according to a predetermined order.

As described above, according to the present invention, it is possible to measure the length and circumference of a measurement object with high accuracy by minimizing an error that may occur in digital measurement while having a light and small size as in the conventional analog tape measure.

In addition, according to the present invention, measured data can be transmitted to a server or a terminal, and measurement length data can be utilized in various application services.

In addition, according to the present invention, a user can intuitively recognize a measurement value for each measurement target.

1 is a view for explaining an embodiment of a smart tape measure and a terminal interlocked with the smart tape measure according to the present invention;
FIG. 2 is a conceptual view for explaining an embodiment of a smart tape measure according to the present invention. FIG.
3 is a view for explaining an embodiment of a pattern displayed on a strap of smart tape measure according to the present invention,
4 is a view for explaining another embodiment of the pattern displayed on the strap of smart tape measure according to the present invention,
FIG. 5 is a flowchart illustrating an operation method of a smart tape measure according to an embodiment of the present invention. FIG.
6 is a flow chart for explaining an embodiment of a method of measuring the length of smart tape measure according to the present invention,
7 is a view for explaining a method of recognizing a smart tape measure pattern and a method of improving accuracy according to the present invention.
8 is a view for explaining a method of measuring a circumference of a smart tape measure according to the present invention,
9 is a view for explaining an operation method of a smart tape measure interlocking terminal according to an embodiment of the present invention.

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same or similar elements.

Hereinafter, one embodiment of a smart tape measure and a terminal associated therewith according to the present invention will be described with reference to FIGS. 1 and 4. FIG.

FIG. 1 is a view for explaining an embodiment of a smart tape measure according to the present invention and a terminal connected to the smart tape measure. FIG. 2 is a conceptual view for explaining an embodiment of a smart tape measure according to the present invention. 1 and 2, a smart tape measure 10 according to the present invention includes a strap 100, a housing 200, a sensor unit 300, and a control unit 400, and includes a communication unit 500, 600, an LED unit 700, an operation unit 800, and a strap fixing unit 900.

The strap 100 is provided on the housing 200, which is a main body of the smart tape measure, in the shape of a roll, in which patterns generated by using a plurality of colors having different reflectances of light are arranged along one direction, (200). The strap displays a pattern used for pattern recognition, and the pattern may include a first pattern that absorbs light and a second pattern that reflects light. In addition, the pattern may be a combination of one or more of the first pattern and the second pattern in the width direction of the strap, that is, the longitudinal direction of the strap irrespective of the length measurement. The pattern can be repeated periodically and the first pattern or the second pattern in the width direction of the strap can be combined to correspond to any one of the 2-bit values (00, 01, 10, 11). Further, it can be combined so that only one bit of the 2-bit value is changed in accordance with the movement of the strap in one direction. Although the unit patterns of FIGS. 3 and 4 shown in the example of the present specification have the shape of a quadrangle, the shape of the unit pattern is not limited to a quadrangle, and any shape is possible as long as the sensor unit 300 can recognize the unit pattern. One embodiment of the pattern combination will be described later with reference to FIGS. 3 and 4. FIG.

The housing 200 is a frame formed to fix various components of the smart tape measure such as the smart tape measure strap 100, the sensor unit 300, and the control unit 400. The strap 100 is configured such that a pattern is variably exposed therein. And a part of the strap 100 is wound and received in a roll form. Therefore, the housing 200 has an entrance through which the strap 100 can enter and exit. Also, the sensor unit 300 and the control unit 400 may be fixed to the inside of the housing 200. 1, the LED unit 700, the operation unit 800, and the strap fixing unit 900 may be provided on the outer side of the housing 200.

 As shown in FIG. 1, the sensor unit 300 is located in the housing and is located in the doorway of the housing 200. The sensor unit 300 is fixedly installed in one or more rows along the width direction of the strap. A light emitting portion 330 for irradiating the pattern with light, and a light receiving portion 370 fixed to the side face of the light emitting portion and sensing the amount of light reflected from the pattern. Unlike the prior art, since the present invention does not use a slit, the light emitting portion 330 and the light receiving portion 370 can be arranged in the same direction, which is easy to manufacture and can reduce the volume. The light receiving unit 370 may be any type of light receiving sensor capable of detecting light regardless of the type of light such as an infrared sensor, a laser sensor, and a general optical sensor. The light emitting unit 330 converts an electric signal into light Any kind of light emitting element capable of irradiating light can be used.

The controller 400 measures the length of the measurement target using a pattern recognized according to the movement of the strap in one direction. More specifically, the control unit 400 may include a counter 410, an operation unit 430, a reference value correction unit 450, an error confirmation unit 470, and an error correction unit 490.

The counter 410 increases the count by one every time the amount of light reflected from the pattern exceeds a preset reference value in accordance with the movement of the strap 100 in one direction. When the movement of the strap 100 in one direction is completed, the calculation unit 430 determines a value obtained by multiplying a preset unit length by a count as the length of the measurement target.

In this specification, the reference value means a value for recognizing the pattern using the amount of reflected light, that is, a reference for judging whether it is the first pattern or the second pattern. The predetermined reference value may be set differently depending on the type of the light emitting device and the light receiving sensor used in the sensor unit 300 and may be an intermediate value between the maximum value and the minimum value of the light amount detected by the light receiving sensor. For example, when the amount of light reflected from the first pattern that absorbs light is 0, and the amount of light reflected from the second pattern that reflects light is 600, the reference value may be 300, which is an intermediate value between 0 and 600 . The reference value is not necessarily the middle value between the maximum value and the minimum value of the light quantity to be sensed but it is more suitable as a criterion for distinguishing the pattern in the case of the intermediate value. However, the present invention is not limited by these embodiments, and it is sufficient that the value is such as to be able to judge a change in the amount of light to be sensed.

In this specification, the unit length means the unit length of the pattern generated in the strap 100, that is, the width of the unit pattern (corresponding to a in FIG. 7). Since the pattern is formed along one direction (in the horizontal direction) of the strap, the value obtained by multiplying the value counted by pattern recognition by the unit length corresponds to the length of the tape measure measured by the actual user.

When the pattern is periodically repeated, the reference value correcting unit 450 corrects the reference value using the amount of light sensed in the immediately preceding cycle every time the pattern passes through one cycle according to the movement of the strap in one direction. The reason for correcting the reference value is that since the performance of the light emitting element deteriorates with time, the amount of light irradiated to the pattern is reduced. That is, since the amount of light reflected from the pattern is also reduced, the overall amount of light is reduced compared with the initial amount. In order to reduce the occurrence of the error, the reference value correcting unit 250 computes an intermediate value between the maximum value and the minimum value of the light amount sensed in the immediately preceding period every one cycle, and sets the new reference value. As a result, even if the performance of the light emitting element is degraded, the count function can be maintained without problems.

The error checking unit 470 checks whether the measured value has an error. If the 2-bit value corresponding to the amount of reflected light corresponds to the k-th 2-bit value at the start value, the error checking unit 470 sets an integer corresponding to the period of the pattern Check for multiple of N + k. For example, if a pattern as shown in FIG. 3 is displayed on the strap 100 and '00' is set as the start value, the pattern generated in FIG. 3 is repeated as four 2-bit values of 00, 10, , The integer N corresponding to the period of the pattern corresponds to 4. That is, since the four patterns are periodically repeated in the pattern of FIG. 3, the count will always be a multiple of 4 when the 2-bit value corresponding to the pattern is 00. FIG. When the 2-bit value corresponding to the pattern is 01, the error checking unit 470 can check whether the error has occurred by checking whether the count is a multiple of 4 + 3. If it is determined that an error has occurred in the sensor unit 300 or the counter 410 when the strap 100 is moved and the counting is not properly performed, if the error checking unit 470 determines that an error has occurred, The count can be adjusted to be a multiple of 4 so that the error can be corrected.

The error correcting unit 490 determines that the end of the strap 110 is temporarily fixed to the strap fixing part of the housing located on the opposite side of the strap opening and exit and measures the circumference of the measurement target. The value obtained by adding the length of the housing is determined as the length of the measurement object. The end portion 110 of the strap shown in FIG. 1 can be temporarily fixed detachably to the strap fixing portion 900 of the housing 200. When measuring the circumference of the body such as the waist circumference and the hip circumference, the circumference length is measured by winding the strap 100 around the object to be measured. 8, when the end portion 110 of the strap is fixed to the strap fixing portion 900, the circumference can be accurately and conveniently measured. Instead, the length d of the lower end of the housing 200 is not included in the circumference . Therefore, by adding the lower end length d of the housing 200 to the length 1 measured using the pattern, the accurate circumferential length can be measured.

The communication unit 500 transmits the length data to the server 30 or the terminal 50 using wired or wireless communication. RFID, IrDa, Bluetooth, ZigBee, Bluetooth LE, ANT, Wi-Fi, etc. may be used as the wireless communication method that the communication unit 500 can use, Long wireless communication methods such as KNX, WirelessHART, 2G-5G and WPAN can be used as well as a short-range wireless communication method such as Z-wave and Fi-Z There is no.

 The power supply unit 600 is configured to supply power to the smart tape measure 10 and includes a battery insertable into the housing 200, a rechargeable battery for supplying energy through wire charging, an electromagnetic induction system, a magnetic resonance system, Lt; RTI ID = 0.0 > wireless < / RTI >

The LED unit 700 is configured to display a power state or a communication connection state. The LED unit 700 can display state information such as a power state or a pairing state (pairing, connection completion, connection termination) . In another embodiment of the LED unit 700, a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light emitting diode state information, such as length information, power state, and communication connection state, and the like, are measured by using an electron emission display (OLED), a flexible display, a 3D display The length information may also be displayed in more detail in text or image.

The operation unit 800 may be formed in the housing 200 in the form of a button, which is included for user operation to control the transmission operation of the length data or the wireless communication connection. When the button is pressed once, Or the server, and controls the application program installed in the terminal 50 by pressing the button twice. This is an embodiment and a control signal generated by using the operation unit 800 can be used to control the smart tape measure 10 or remotely control the server 30 or the terminal 50 according to user setting.

The strap fixture 900 is formed in the housing 200 in a configuration that can fix the end 110 of the strap as described above.

The server 30 or the terminal 50 shown in FIG. 1 can provide the necessary service to the user by using the length data received from the smart tape measure 10. An application program linked to the smart tape measure 10 may be installed in the server 30 or the terminal 50 and the smart tape measure 10 may transmit a control signal to the server 30 or the terminal 50, ) Or the terminal 50, or may transmit the length data.

Hereinafter, one embodiment of the pattern displayed on the strap 100 of the smart tape measure will be described with reference to FIGS. Referring to FIG. 3, a pattern according to an exemplary embodiment of the present invention includes a first pattern (black block) for absorbing light, a second pattern (white block) for reflecting light, Direction) in which the first pattern and the second pattern are combined. The pattern combined in the width direction of the strap can correspond to any one of the 2-bit values, and when the strap moves in the leftward direction, the pattern changes in the order of 00, 10, 11, In order. In other words, in the case of 00 → 10, only the left digit, 10 → 11 the right digit, 11 → 01 the left digit, and 01 → 00 the right digit. The width (a) of each unit pattern corresponds to the unit length. If the transverse length of the unit pattern is 5 mm, if 20 pattern changes are counted through pattern recognition, the length of the object to be measured will be 5 mm x 20 = 100 mm. Also, since this pattern is repeated in units of four patterns, when the start value is set to 00, the count corresponding to the start value will be a multiple of 4, and it can be confirmed whether or not an error has occurred.

4, two patterns of the first pattern and the second pattern are combined in the width direction of the strap, similar to the pattern shown in Fig. The difference is that for this pattern, we have nine 2-bit values in one cycle until the start value of 00 is repeated again. The patterns shown in FIG. 4 are periodically repeated with {00, 10, 01, 11, 10, 01, 11, 10, 01} as one group. In this case, the count corresponding to the start value will be a multiple of 9. Also, according to the embodiment of the pattern shown in Fig. 4, when the strap moves in the left direction, only one bit of the two bits value is changed and both bits are changed. The amount of light reflected at the upper and lower portions of the pattern is sensed by using two light receiving sensors, and the controller 400 increases the count even if only one bit is changed. Therefore, even if both bits are changed, . Accordingly, one count per unit length increases, so that the result is the same as the pattern of FIG. 3, and the pattern that can be displayed on the strap 100 of the present invention can be variously changed according to the setting . The combination of the patterns is not limited to the embodiments of FIGS. 3 and 4, and the first pattern and the second pattern may be combined in one or more than three in the width direction of the strap. In this case, the pattern combined in the width direction of the strap may correspond to a 1-bit value or a 3-bit or more value. Also, the first pattern that absorbs light and the second pattern that reflects light do not necessarily have to be black or white.

Hereinafter, a method of operating the smart tape measure according to the present invention will be described with reference to FIGS. 5 to 6. FIG.

Referring to FIG. 5, in a method of operating a smart tape measure using pattern recognition, light is irradiated onto a pattern displayed along one direction using a plurality of colors having different reflectances of light (S100) To recognize the pattern (S200). Next, the length of the object to be measured is measured using a pattern recognized in accordance with the movement of the strap in which the pattern is indicated in one direction (S300). At this time, the pattern includes a first pattern for absorbing light, 2 patterns, and one or more of the first pattern and the second pattern may be combined in the width direction of the strap. The measured length data may be transmitted to the server or the terminal using wired / wireless communication (S400).

Referring to FIG. 6, in step S300, the count is incremented by 1 (S330) every time the reflected light amount passes the preset reference value in accordance with the movement of the strap in one direction When the measurement is completed, it may include determining the value obtained by multiplying the predetermined unit length by the count as the measurement object length (S350). The pattern may be repeated periodically. In this case, the step S300 may include the step of correcting the reference value using the amount of light sensed in the immediately preceding cycle every time the pattern passes through one cycle in accordance with the movement of the strap in one direction .

In another embodiment, the pattern is combined such that the first pattern or the second pattern corresponds to any one of the 2-bit values (00, 01, 10, 11) in the width direction of the strap. Lt; RTI ID = 0.0 > value. ≪ / RTI > In the case of such a pattern, the smart tape measure operating method of the present invention sets one of the 2-bit values as the start value, and if the 2-bit value corresponding to the reflected light amount corresponds to the k-th 2-bit value at the start value, Is a multiple of the integer N corresponding to the period of the pattern + k.

According to another embodiment of the smart tape measure operating method according to the present invention, when it is determined that the user measures the circumference of the measurement target, a value obtained by adding the length of the smart tape measure to the length measured using the pattern, As shown in FIG.

FIG. 7 is a view for explaining a pattern recognition method and an accuracy improving method of a smart tape measure according to the present invention. FIG. 7 is a graph showing the amount of light detected through the light receiving unit 370 of the smart tape measure 10, . Since the first pattern and the second pattern are combined so that the pattern shown in FIG. 3 corresponds to any one of the 2-bit values in the width direction of the strap, the light receiving unit 370 uses two light receiving sensors, The pattern can be recognized. Assume that when the first light receiving sensor measures the amount of light sensed from the pattern at the top of the strap, the strap moves in one direction at a constant speed. The x-axis in Fig. 7 represents the time axis, the pattern at the top of the strap corresponds to a bit value of 0110/0110/0110/0110 in time, and the pattern at the bottom of the strap corresponds to a bit of 0011/0011 / Value. The length measurement using the pattern is performed by increasing the count by one every time the amount of reflected light passes the predetermined reference value with the reference value passing through the graph as the center and setting the unit length Is determined as the length of the object to be measured. That is, as shown in FIG. 7, the count increases by 1 at a point C1 where the amount of light sensed by the first light receiving sensor passes the reference value, and when the light amount sensed by the second light receiving sensor passes the reference value C2, The count will be two. The smart tape measure will be incremented by 1 each time the amount of light sensed by each sensor crosses the reference value and the pattern will be combined so that the count increments by 1 for each unit pattern, Can be measured.

Referring to FIG. 7, a method of correcting a reference value will be described. A solid line drawn down in a stepwise manner represents a reference value corrected using a preset reference value and a light amount sensed in a previous cycle every time the pattern passes through one cycle. When the maximum value (max1) of the amount of light initially sensed by the first light receiving sensor is compared with the maximum value (max2) of the amount of light sensed after the elapse of time, the overall amount of light is reduced with time. Actually, the magnitude of the light quantity will not be abruptly reduced in a short time as shown in FIG. 7, but the reference value can be corrected every cycle.

FIG. 8 is a view for explaining a method of measuring the circumference of a smart tape measure according to the present invention, and the measurement of the circumference length will not be described in detail.

9 is a view for explaining an operation method of a smart tape measure interlocking terminal according to an embodiment of the present invention. In the operation method of the terminal 50 capable of interlocking with the smart tape measure, the terminal 50 displays one or more measurement targets, activates and displays a first measurement target to be measured using the smart tape measure, After receiving the data, the length data can be made to correspond to the first measurement target. Then, the second measurement object according to the predetermined order can be activated and displayed. For example, referring to the left screen shown in FIG. 9, when the shoulder width is to be measured, the shoulder portion to be measured can be displayed as an image or displayed in blue. A description of the measurement method can be additionally displayed. When the length data is received from the smart tape measure 10 in a state in which the shoulder width measurement is activated, the corresponding data corresponds to the 'shoulder width' and is stored in the server 30 or the terminal 50 with a value of 'shoulder width' . The terminal 50 can display 'chest circumference' to be measured next after the 'shoulder width' measurement is completed.

If the measurement subject change signal is received from the smart tape measure, the third measurement target corresponding to the second measurement target is activated and displayed. When the second length data is received from the smart tape measure, . For example, after measuring the shoulder width, the 'chest circumference' is activated. When the user presses the control panel twice and receives a measurement target change signal from the smart tape measure, the 'waist circumference' have. When the length data is received from the smart tape measure in the state where the 'waist circumference' is activated, the terminal 50 corresponds the length data to the 'waist circumference', and the length data corresponds to the waist circumference, 50). This operation can be performed not only through the measurement subject change signal of the smart tape measure but also through the operation of the touch display of the terminal 50. [

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, But the present invention is not limited thereto.

10: Smart tape measure
30: Server
50: terminal

Claims (19)

A method of operating a smart tape measure using pattern recognition,
Irradiating light onto a pattern displayed along one direction using a plurality of colors having different reflectances of light, and recognizing the pattern using an amount of light reflected from the pattern;
And measuring the length of the measurement target using the pattern recognized according to the movement of the strap in one direction of the pattern.
The method according to claim 1,
The pattern
A first pattern for absorbing light and a second pattern for reflecting light, wherein at least one of the first pattern and the second pattern is combined in the width direction of the strap,
The step of measuring the length
Increasing the count by 1 each time the amount of reflected light exceeds a preset reference value in accordance with movement of the strap in one direction;
Determining a value obtained by multiplying the predetermined unit length by the count when the movement in the one direction of the strap is completed as the length of the measurement object;
The method comprising the steps of:
3. The method of claim 2,
The pattern is repeated periodically,
The step of measuring the length
And correcting the reference value using the amount of light sensed in the previous cycle every time the pattern passes through one cycle in accordance with movement of the strap in one direction
3. The method of claim 2,
The pattern
Wherein the first pattern or the second pattern in the width direction of the strap is combined so as to correspond to any one of the 2-bit values (00, 01, 10, 11) Wherein only one bit is changed so that only one bit is changed.
5. The method of claim 4,
Setting one of the two bit values as a start value;
Determining whether the count is a multiple of an integer N corresponding to the period of the pattern + k if the 2-bit value corresponding to the amount of reflected light corresponds to a k-th 2-bit value at the start value. How the tape measure works.
The method according to claim 1,
If it is determined that the circumference of the measurement object is to be measured,
Determining a value obtained by adding the length of the housing of the smart tape measure to the length measured using the pattern as the length of the measurement target;
Further comprising the steps of:
The method according to any one of claims 1 to 6,
And transmitting the measured length data to a server or a terminal using wired / wireless communication.
In smart tape measure using pattern recognition,
A strap having patterns formed by using a plurality of colors having different reflectances of light along one direction;
A housing in which the strap is inserted and removed so that the pattern is variably exposed; And
A sensor unit located in the housing corresponding to the pattern and sensing the pattern;
And a controller for measuring a length of the measurement target using the pattern recognized according to the movement of the strap in one direction.
9. The method of claim 8,
The sensor unit
A light emitting part which is located in an entrance of the housing and which is fixedly arranged in a line in at least one direction along the width direction of the strap,
And a light receiving unit fixed to the side surface of the light emitting unit and sensing an amount of light reflected from the pattern.
9. The method of claim 8,
The pattern
A first pattern for absorbing light and a second pattern for reflecting light, wherein at least one of the first pattern and the second pattern is combined in the width direction of the strap,
The control unit
A counter for incrementing the count by one each time the amount of reflected light passes the preset reference value in accordance with the movement of the strap in one direction;
And a calculator for determining a value obtained by multiplying the predetermined unit length by the count when the movement of the strap in one direction is completed as the length of the measurement object.
11. The method of claim 10,
The pattern is repeated periodically,
The control unit
Further comprising a reference value correcting unit for correcting the reference value using a light amount sensed in a previous cycle every time the pattern passes through one cycle according to a movement of the strap in one direction.
11. The method of claim 10,
Wherein the pattern is combined such that the first pattern or the second pattern corresponds to any one of the 2-bit values (00, 01, 10, 11) in the width direction of the strap, Wherein only one bit of the bit value is changed.
13. The method of claim 12,
The control unit
And if the 2-bit value corresponding to the amount of reflected light corresponds to the k-th 2-bit value at the start value, the count is set to an integer N corresponding to the period of the pattern And an error checking unit for checking whether the number of times of measurement is a multiple of k + k.
9. The method of claim 8,
The control unit
And determining that the circumference of the measurement object is measured when the end of the strap is temporarily fixed to the strap fixing portion of the housing located on the side opposite to the strap opening and out of the strap and the length of the housing of the smart tape measure at the length measured using the pattern And determining an added value as the length of the measurement target.
15. The method according to any one of claims 8 to 14,
And a communication unit for transmitting the length data to a server or a terminal using wired / wireless communication.
16. The method of claim 15,
And a control unit for controlling a transmission operation or a wireless communication connection of the length data.
The method according to any one of claims 8 to 16,
A power supply unit for supplying power to the smart tape measure;
And an LED unit for displaying the power state or the communication connection state.
A method of operating a terminal capable of interworking with a smart tape measure using pattern recognition,
Displaying one or more measurement objects;
Activating and displaying a first measurement object to be measured using the smart tape measure;
Receiving first length data from the smart tape measure;
Mapping the length data to the first measurement object;
And activating a second measurement object according to a predetermined order.
19. The method of claim 18,
Upon receiving the measurement object change signal from the smart tape measure,
Displaying a third measurement target corresponding to the second measurement target in the active order;
Further comprising the step of mapping the second length data to the third measurement object upon receipt of the second length data from the smart tape measure.

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