CN106556311B - Intelligent measuring tape with switch and data acquisition method thereof - Google Patents

Abstract

The present invention discloses an intelligent tape measure with a switch and a data reading method thereof. By directly setting a Gray code on the tape measure, and repeatedly setting the Gray code on the tape measure according to a specified period, rather than printing a Gray code disk and setting it in the intelligent tape measure body, the volume of the intelligent tape measure is reduced; at the same time, each Gray code in a period has a black code or a white code of a certain width, and the Gray code on the tape measure can be read by a reading device, replacing the traditional scale reading method, and enhancing the stability of the reading. Since a switch device for controlling the opening or closing of an infrared transceiver is also provided, the infrared transceiver is powered on and works only when the switch is turned on, and the infrared reading devices on both sides of the tape measure are turned on in time-sharing mode, rather than turned on at the same time, thereby saving electric energy.

Description

A kind of intelligent tape measure with switch and its data acquisition method

technical field

The invention relates to the technical field of intelligent tape measures, in particular to an intelligent tape measure with a switch and a data acquisition method thereof.

Background technique

Gray code belongs to reliability coding and is an error-minimizing coding method. Because, although the natural binary code can be directly converted into an analog signal by a digital-to-analog converter, in some cases, such as converting from decimal 3 to 4, every bit of the binary code must be changed, which can make the digital circuit produce very Large spike current pulses. The Gray code does not have this disadvantage. When it is converted between adjacent bits, only one bit changes. It greatly reduces the confusion of logic when going from one state to the next. Since there is only one bit difference between the two adjacent code groups of this encoding, in the conversion of the linear displacement amount for the direction to the digital amount, when the linear displacement amount changes slightly (and may cause the digital amount to change) , the Gray code only changes one bit, which is more reliable than the situation where other codes change two or more bits at the same time, which can reduce the possibility of errors.

In the prior art, gray code disks are mostly used for detection or counting. When the encoder or the brush device reads the gray code disk, the phenomenon of brush skipping or brush leakage often occurs, that is, because the speed of the brush device is too fast, the brushes appear. The device bounces over a certain Gray code, resulting in a wrong count, which is not conducive to the use of the Gray code. At the same time, arranging the Gray code disc in the smart tape measure body occupies a large internal space, making the device larger. Moreover, the smart tape measures in the prior art are all smart tape measures without power saving function.

Therefore, the existing technology still needs to be improved and developed.

SUMMARY OF THE INVENTION

In view of the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide an intelligent tape measure with a switch, which aims to solve the problem that in the prior art, when the length scale is printed on the tape measure tape in the prior art, the reading error is prone to occur, or the gray scale is arranged inside the tape measure. The code disc causes the device to be bulky, and the smart tape measure has no power-saving feature.

The technical scheme of the present invention is as follows:

A smart tape measure with a switch, which includes a smart tape measure body, and a tape measure tape which is arranged in the smart tape measure body and can be drawn out. The Gray code in the code channel is repeatedly set according to a specified period; the intelligent tape measure body is also provided with an infrared transceiver group corresponding to the Gray code channel one-to-one, for reading the Gray code in the Gray code channel, and for controlling the infrared A switch device for turning on or off the transceiver group, the switch device is electrically connected with the infrared transceiver group; the switch device is a button switch or a toggle switch; the infrared transceiver group includes a grayscale on the front of the tape measure tape The low-position infrared transceiver device group is directly opposite to the code channel, and the high-position infrared transceiver device group is directly opposite to the Gray code channel on the back of the tape measure tape; the low-position infrared transceiver device group is turned on when the switch device is turned on, and the high-position infrared transceiver device group is turned on. The IR transceiver group remains on standby or off.

In the smart tape measure with switch, the front and back surfaces of the tape measure are provided with 3 Gray code channels from bottom to top.

The smart tape measure with switch, wherein, the front of the tape measure tape is provided with three lower gray code channels, which are the first gray code channel, the second gray code channel, and the third gray code channel.

The smart tape measure with switch, wherein the low-position infrared transceiver device group disposed on the side of the smart tape measure body facing the front of the tape measure tape includes three infrared transceiver devices, which are a first infrared transceiver device and a second infrared transceiver device. device and a third infrared transceiver; wherein, the first infrared transceiver is facing the first Gray code channel, the second infrared transceiver device is facing the second Gray code channel, the third The infrared transceiver is facing the third Gray code channel.

In the smart tape measure with switch, the first infrared transceiver is turned on when the switch is turned on, and the second infrared transceiver and the third infrared transceiver remain in a standby or off state.

In the smart tape measure with switch, wherein, the back of the tape measure tape is provided with gray code channels with high three digits, which are respectively the fourth gray code channel, the fifth gray code channel and the sixth gray code channel.

The smart tape measure with switch, wherein, the high-level infrared transceiver device group disposed on the side of the smart tape measure body facing the back of the tape measure tape includes 3 infrared transceiver devices, which are the fourth infrared transceiver device and the fifth infrared transceiver device. device and a sixth infrared transceiver; wherein, the fourth infrared transceiver is facing the fourth Gray code channel, the fifth infrared transceiver device is facing the fifth Gray code channel, the sixth The infrared transceiver device is facing the sixth Gray code channel.

A data acquisition method for a smart tape measure with a switch, comprising the following steps:

A. When it is detected that the switch device is in an open state, the low-level infrared transceiver group that is directly opposite to the gray code channel on the front of the tape measure tape is turned on, and real-time detection of whether the low-level infrared transceiver group has pulse generation;

B. When the low-level pulse of the low-level infrared transceiver group is detected, the low-level infrared transceiver group and the high-level infrared transceiver group are both turned on, and when the tape measure tape is twitched, the real-time reading of the tape measure on the Gray code track reading;

C. When detecting that the tape measure tape changes from a twitching state to a static state, obtain the current reading of the smart tape measure according to the first current reading obtained by the low-level infrared transceiver group and the second current reading obtained by the high-level infrared transceiver group. reading.

Beneficial effects: The intelligent tape measure with switch and the data reading method thereof of the present invention directly set the Gray code on the tape measure tape, and repeatedly set the Gray code on the tape measure tape according to a specified period, instead of printing the Gray code The disc is arranged in the body of the smart tape measure, reducing the volume of the smart tape measure; at the same time, each Gray code in a cycle has a black code or white code with a certain width, and the Gray code on the tape measure can be read by the reading device. , which replaces the traditional scale reading method and enhances the stability of the reading. Since a switch device for controlling the opening or closing of the infrared transceiver is also provided, the infrared transceiver can only be powered on when the switch is turned on, and the infrared reading devices on both sides of the tape measure are opened at different times, not at the same time. Electricity is saved.

Description of drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of the smart tape measure with switch according to the present invention.

FIG. 2 is an exploded view of a preferred embodiment of the smart tape measure with switch according to the present invention.

FIG. 3 is a schematic diagram of the front side of the tape measure in the preferred embodiment of the smart tape measure with switch according to the present invention.

4 is a schematic diagram of the back of the tape measure in the preferred embodiment of the smart tape measure with switch according to the present invention.

FIG. 5 is a flow chart of a preferred embodiment of the data reading method of the smart tape measure with switch according to the present invention.

Detailed ways

The present invention provides an intelligent tape measure with a switch and a data reading method thereof. In order to make the purpose, technical solutions and effects of the present invention clearer and clearer, the present invention is further described below in detail. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Please refer to FIGS. 1-2 at the same time, wherein FIG. 1 is a schematic structural diagram of a preferred embodiment of the smart tape measure with a switch according to the present invention, and FIG. 2 is an exploded view of the preferred embodiment of the smart tape measure with a switch according to the present invention, The smart tape measure based on the tape switch includes a smart tape measure body 100, and a tape measure tape 200 that is arranged in the smart tape measure body 100 and can be drawn out. The front and back of the tape measure tape 200 are provided with at least one Gray code channel 210. , the Gray code in the Gray code channel 210 is repeatedly set according to a specified period; the smart tape measure body 100 is also provided with an infrared transceiver device corresponding to the Gray code channel one-to-one and used for reading the Gray code in the Gray code channel 210 A group 300, and a switch device 400 for controlling the opening or closing of the infrared transceiver device group 300, the switch device 400 is electrically connected to the infrared transceiver device group 300; the switch device 400 is a button switch or a toggle switch ; The infrared transceiver group 300 includes a low-level infrared transceiver group that is directly opposite to the Gray code channel 210 on the front of the tape measure, and a high-level infrared transceiver group that is directly opposite to the Gray code channel 210 on the back of the tape measure; the The low-level infrared transceiver group is turned on when the switch device 400 is turned on, and the high-level infrared transceiver group remains in a standby or off state.

When the user needs to use the smart tape measure with switch to measure the length, the switch device 400 is turned to the "ON" state, so that the low-level infrared transceiver group in the infrared transceiver group 300 is turned on. When a pulse is generated in the low-level infrared transceiver device group, the low-level infrared transceiver device group and the high-level infrared transceiver device group are both turned on. At this time, the infrared transceiver device group 300 can send infrared light to the tape measure tape 200. At the same time, the light reflected by the tape measure tape 200 is received, so as to read the length value corresponding to the Gray code on the tape measure tape 200 . When the user does not need to use the smart tape measure with switch for measurement, the switch device 400 is turned to the "OFF" state, so that the infrared transceiver group 300 is turned off or enters the standby state, thereby saving power.

During specific implementation, the smart tape measure body 100 is also provided with a display screen for displaying the real-time reading and status of the smart tape measure; A wireless transceiver module for the terminal to send data; the smart tape measure body 100 is also provided with a power supply for power supply. More specifically, the display screen is an E-ink display screen, a TN display screen, an STN display screen or a TFT display screen; the wireless transceiver module is a Bluetooth module.

Further, as shown in FIG. 3 and FIG. 4 , at least one linear Gray code channel 210 is disposed on both the front and back sides of the tape measure tape 200 , and a plurality of counting Gray codes are disposed on the Gray code channel 210 . During specific implementation, as shown in FIGS. 1 and 2 , the smart tape measure body 100 is provided with a tape measure tape outlet 110 , and a position close to the tape measure tape outlet 110 in the smart tape measure body 100 is provided with a gray code channel 210 correspond to the infrared transceiver device group 300 one-to-one.

Since all the Gray code channels 210 are arranged on the same side of the tape measure tape 200, the width of the tape measure tape 200 will be increased, that is, the height of the tape measure tape outlet 110 will be increased, that is, the thickness of the smart tape measure body 100 will be increased, thereby increasing the overall The volume of the smart tape measure is inconvenient for users to carry.

If the Gray code channel 210 is arranged on both sides of the tape measure tape 200, the width of the tape measure tape 200 can be reduced, which is beneficial to reduce the volume of the smart tape measure and is convenient for the user to carry.

For example, when a total of 6 Gray code channels 210 are arranged on the tape measure 200, N Gray code channels (where 1≤N≤6, and N is a positive integer) can be arranged on the front side, and (6-N) can be arranged on the back side. Gray code. Since the height of each Gray code channel 210 is the same and a fixed value, the sum of the heights of the Gray code channels 210 on the same side of the tape measure tape 200 is equal to the width of the tape measure tape 200 , so when the number of gray code channels 210 on the front side of the tape measure tape 200 is equal to the width of the tape measure tape 200 When the number differs from the number of the Gray code channels 210 on the back of the tape measure 200 by one or is completely equal, the width of the tape measure tape 200 can be reduced to a minimum value.

Preferably, as shown in FIG. 3 and FIG. 4 , the front and back of the tape measure 200 are provided with three Gray code channels 210 from bottom to top; The first gray code channel 211 , the second gray code channel 212 and the third gray code channel 213 The five-digit Gray-coded channel 215 and the sixth-digit Gray-coded channel 216 .

In specific implementation, as shown in FIG. 3 , the first gray code channel 211 is provided with the first gray code channel black code and the first gray code channel white code that alternately appear in black and white. The maximum width of the black code of the bit Gray code channel is 2mm. As shown in FIG. 4 , the fourth gray code channel 214 is provided with a fourth gray code channel black code and a fourth gray code channel white code that alternately appear in black and white, and the fourth gray code channel black code The maximum width of the yard is 16mm. When the maximum width of the black code of the first gray code track is set to 2 mm, each length period of the sixth gray code channel 216 is 64 mm (that is, the black code appears only once in the same cycle, and only One time white code), that is, the repetition period L _T of the 6-digit Gray code set in the tape measure tape 200 is 64mm. Similarly, when the maximum width of the black code of the first gray code channel is set to 4 mm, the repetition period L _T of the 6-digit Gray code is 128 mm. Since 6 Gray code tracks are set on the tape measure tape 200 and the repetition period L _T of the 6-digit Gray code is 64 mm, it is already sufficient for the user to extract the tape measure tape 200 at various speeds without causing infrared rays The transceiver group 300 misses the count of the number of repetitions of the repetition period _LT . Therefore, the repetition period _LT of the 6-bit Gray code can be set to 64 mm in specific implementation.

In order to illustrate the setting method of the 6-digit Gray code on the tape measure tape 200 in the present invention more clearly, further description is given below through the 6-digit Gray code table as shown in Table 1-Table 4 and FIG. 3 and FIG. 4 .

serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number 1 000000 0 0 9 001100 1 7 2 000001 0 1 10 001101 1 6 3 000011 0 2 11 001111 1 5 4 000010 0 3 12 001110 1 4 5 000110 0 4 13 001010 1 3 6 000111 0 5 14 001011 1 2 7 000101 0 6 15 001001 1 1 8 000100 0 7 16 001000 1 0

Table 1

serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number 17 011000 2 0 25 010100 3 7 18 011001 2 1 26 010101 3 6 19 011011 2 2 27 010111 3 5 20 011010 2 3 28 010110 3 4 twenty one 011110 2 4 29 010010 3 3 twenty two 011111 2 5 30 010011 3 2 twenty three 011101 2 6 31 010001 3 1 twenty four 011100 2 7 32 010000 3 0

Table 2

serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number 33 110000 4 0 41 111100 5 7 34 110001 4 1 42 111101 5 6 35 110011 4 2 43 111111 5 5 36 110010 4 3 44 111110 5 4 37 110110 4 4 45 111010 5 3 38 110111 4 5 46 111011 5 2 39 110101 4 6 47 111001 5 1 40 110100 4 7 48 111000 5 0

table 3

serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number 49 101000 6 0 57 100100 7 7 50 101001 6 1 58 100101 7 6 51 101011 6 2 59 100111 7 5 52 101010 6 3 60 100110 7 4 53 101110 6 4 61 100010 7 3 54 101111 6 5 62 100011 7 2 55 101101 6 6 63 100001 7 1 56 101100 6 7 64 100000 7 0

Table 4

It can be seen from the 6-bit Gray code table in Table 1-Table 4 that the repetition period of the 6-bit Gray code is 64, and the Gray code with the serial number (M+1) is compared with the Gray code with the serial number M (where 1 ≤M≤63), one and only one digit has changed (from 1 to 0, or from 0 to 1). If the black code is denoted as 0 and the white code is denoted as 1, the above-mentioned 64 6-digit Gray codes are printed from one end of the tape measure tape 200 to the other end in sequence. For example, set the 6-bit Gray code of 000000 with a serial number of 1 at the end of the starting point. Specifically, set the highest bit (ie the sixth bit) 0 in the 6-bit Gray code to the sixth bit Gray code channel 216, and set the second highest bit (ie the sixth bit) The fifth bit) 0 is set to the fifth bit Gray code channel 215, the fourth bit 0 is set to the fourth bit Gray code channel 214, the third bit 0 is set to the third bit Gray code channel 213, and the second lower bit (ie The second bit) 0 is set on the second gray code channel 212, the lowest bit (ie the first bit) 0 is set on the first gray code channel, the height of the above 6 codes is equal to the height of the corresponding gray code channel, The above-mentioned 6 codes are all rectangular bars, and the width of the rectangular bars are all 1mm. In this way, according to the serial numbers shown in Table 1-Table 4, the gray codes are sequentially set on the tape measure tape 200, and the results shown in Figure 3 and Figure 4 can be obtained. The tape measure tape 200 shown. Wherein, as shown in FIG. 3 , the front of the tape measure tape 200 is provided with the first Gray code channel 211 , the second Gray code channel 212 and the third Gray code channel 213 sequentially from top to bottom. The tape measure shown in FIG. 4 The sixth Gray code channel 216 , the fifth Gray code channel 215 and the fourth Gray code channel 214 are arranged on the back of the tape 200 in sequence from top to bottom.

When the front and back of the tape measure tape 200 of the smart tape measure are provided with three Gray code channels 210 from bottom to top, infrared transceivers corresponding to the Gray code channels 210 are also provided, and each infrared transceiver is also provided. The irradiation range of the infrared light emitted by the device does not exceed the height range of each Gray code track 210 . The low-position infrared transceiver device group disposed on the side of the smart tape measure body 100 facing the front of the tape measure tape 200 includes three infrared transceiver devices, which are a first infrared transceiver device, a second infrared transceiver device, and a third infrared transceiver device; The high-level infrared transceiver set on the side of the smart tape measure body 100 facing the back of the tape measure tape 200 includes three infrared transceivers, which are a fourth infrared transceiver, a fifth infrared transceiver and a sixth infrared transceiver. Specifically, the first infrared transceiver device is facing the first Gray code channel 211, the second infrared transceiver device is facing the second Gray code channel, and the third infrared transceiver device is facing the third Gray code channel Channel 213, the fourth infrared transceiver is facing the fourth Gray code channel 214, the fifth infrared transceiver is facing the fifth Gray code channel 215, and the sixth infrared transceiver is facing the sixth Gray code Code channel 216. The above six infrared transceivers are respectively connected to corresponding I/O ports in the MCU control chip in the smart tape measure body 100 .

In order to realize the power saving function, the first infrared transceiver in the low-level infrared transceiver group is turned on when the switch device is turned on, the second infrared transceiver and the third infrared transceiver are kept in a standby or off state, and at the same time , the fourth infrared transceiver device, the fifth infrared transceiver device and the sixth infrared transceiver device are also kept in a standby or off state. Only when it is detected that a pulse is generated in the first infrared transceiver, the second infrared transceiver, the third infrared transceiver, the fourth infrared transceiver, the fifth infrared transceiver and the sixth infrared transceiver are turned on, and the second infrared transceiver, the third infrared transceiver, the fourth infrared transceiver, the fifth infrared transceiver and the sixth infrared transceiver are turned on. Real-time readings on the gray-coded tape of the tape measure tape when the tape measure tape is twitched.

Since three infrared transceiver device groups 300 are provided on both sides of the tape measure tape 200, if the infrared transceiver devices on both sides of the tape measure tape 200 are completely facing each other, the infrared rays emitted by the infrared transceiver device groups 300 on the tape measure tape 200 side will transmit through all the infrared transceivers. When the tape measure tape 200 is used, the infrared light receiving result of the infrared transceiver group 300 on the other side will be changed, which will affect the measurement result.

In order to ensure the accuracy of the measurement results, the starting point of the Gray code track on the front side of the tape measure 200 needs to be staggered from the starting point of the Gray code track on the back side of the tape measure tape 200 . Because when the tape measure tape 200 is not initially pulled out, the first infrared transceiver is facing the starting point of the first gray code track 211, and the second infrared transceiver is facing the second gray code The starting point of the channel 212, the third infrared transceiver device is facing the starting point of the third Gray code channel 213, the fourth infrared transceiver device is facing the starting point of the fourth Gray code channel 214, and the fifth infrared transceiver device is facing the starting point of the fourth Gray code channel 214. The starting point of the fifth-digit Gray code channel 215 is opposite to the starting point of the sixth-digit Gray code channel 216 by the sixth infrared transceiver. Since the starting point of the Gray code track on both sides of the tape measure tape 200 is misplaced, the first infrared transceiver device, the second infrared transceiver device and the third infrared transceiver device distributed on one side of the tape measure tape 200 are located in the opposite position relative to the distribution The positions of the fourth infrared transceiver, the fifth infrared transceiver and the sixth infrared transceiver on the other side of the tape measure tape 200 are displaced by a certain distance. In a specific implementation, the starting point of the Gray code track on the front side of the tape measure 200 and the start point of the Gray code track on the back side of the tape measure tape 200 are misaligned by a distance of 5-6 mm. Preferably, the starting point of the Gray code track on the front side of the tape measure tape 200 and the start point of the Gray code track on the back side of the tape measure tape 200 are misaligned by a distance of 5.5 mm.

Because black codes and white codes appear on each Gray code channel 210 in a certain period, and white codes and black codes appear alternately. At the same time, the black code and the white code have different absorption rates of infrared light emitted by the infrared transceiver group 300. Specifically, the black code has a high absorption rate of infrared light, and the white code has a low absorption rate of infrared light, which is lower than that of the black code. Light absorption rate, the infrared light reflected by the black code is decoded as 0 after being received by the infrared transceiver group 300, and the infrared light reflected back by the white code is received by the infrared transceiver group 300 and decoded as 1.

Therefore, when the tape measure 200 is being pulled, the infrared transceiver unit 300 and the MCU control chip disposed in the smart tape measure body 100 and connected to the infrared transceiver unit 300 jointly detect that the tape measure 200 is being pulled and the cycle repeats. The number n of the length and the offset ΔL in the current repetition period length, and then L=n*L _T +ΔL can calculate the actual measurement length L, which realizes the precise measurement of the length and reduces the measurement error. Specifically, a black code and a white code with a certain width are set on each Gray code channel of the tape, which effectively avoids the measurement error caused by the deformation of the soft tape being stretched.

Based on the above device embodiment, the present invention also provides a data acquisition method of a smart tape measure with a switch, as shown in FIG. 5 , the method includes the following steps:

Step S100, when it is detected that the switch device is in an open state, then the low-level infrared transceiver device group that is directly opposite to the gray code channel on the front of the tape measure tape is turned on, and real-time detection of whether the low-level infrared transceiver device group has pulse generation;

Step S200, when detecting the low-order pulse of the low-level infrared transceiver group, then both the low-level infrared transceiver group and the high-level infrared transceiver group are turned on, and when the tape measure tape is twitched, read the tape on the Gray code track in real time. reading;

Step S300, when it is detected that the tape measure tape changes from a twitching state to a static state, according to the first current reading obtained by the low-level infrared transceiver device group, and the second current reading obtained by the high-level infrared transceiver device group, obtain the smart tape measure. Current reading.

Specifically, as shown in FIG. 3 , the front of the tape measure tape 200 is provided with the first Gray code channel 211 , the second Gray code channel 212 and the third Gray code channel 213 sequentially from top to bottom, as shown in FIG. 4 . The sixth Gray code channel 216 , the fifth Gray code channel 215 and the fourth Gray code channel 214 are arranged on the back of the tape measure tape 200 in sequence from top to bottom, and the first infrared transceiver is facing the first Gray code channel 211, the second infrared transceiver device is facing the second Gray code channel, the third infrared transceiver device is facing the third Gray code channel 213, the fourth infrared transceiver device is facing the fourth Gray code channel 214 , the fifth infrared transceiver device is facing the fifth Gray code channel 215 , and the sixth infrared transceiver device is facing the sixth Gray code channel 216 .

When the switch device 400 is turned to the "ON" state, the first infrared transceiver is turned on first, and real-time detection is performed on whether it generates a pulse, and when a pulse is detected, the second infrared transceiver is connected to the The device, the third infrared transceiver device, the fourth infrared transceiver device, the fifth infrared transceiver device and the sixth infrared transceiver device are turned on, and when the tape measure tape is twitched, the readings on the Gray code track of the tape measure tape are read in real time. In this way, the infrared transceiver device of the tape measure 200 can be turned on in a time-sharing manner, which effectively saves power.

To sum up, the intelligent tape measure with switch and the data reading method thereof according to the present invention directly set the Gray code on the tape measure tape, and repeatedly set the Gray code on the tape measure tape according to a specified period, instead of printing the gray code. The gray code disc is arranged in the body of the smart tape measure, which reduces the volume of the smart tape measure; at the same time, each gray code in a cycle has a black code or a white code with a certain width, which can be read by the reading device on the tape measure tape. Gray code, instead of the traditional scale reading method, enhances the stability of the reading. Since a switch device for controlling the opening or closing of the infrared transceiver is also provided, the infrared transceiver can only be powered on when the switch is turned on, and the infrared reading devices on both sides of the tape measure are opened at different times, not at the same time. Electricity is saved.

It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above descriptions, and all these improvements and transformations should belong to the protection scope of the appended claims of the present invention.

Claims (5)

1. an intelligent tape measure with a switch, it is characterized in that, comprises a smart tape measure body, and is arranged in the described smart tape measure body and can be drawn out the tape measure tape, the front and back of the described tape measure tape are all provided with 3 from bottom to top. Gray code channels; the front of the tape measure tape is set with low three gray code channels, the back of the tape measure tape is provided with high three gray code channels, and the gray codes in the gray code channels are repeatedly set according to a specified period; the intelligent tape measure The body is also provided with an infrared transceiver device group corresponding to the Gray code channel one-to-one and used for reading the Gray code in the Gray code channel, and a switch device for controlling the opening or closing of the infrared transceiver device group. The infrared transceiver device group is electrically connected; the switch device is a button switch or a toggle switch; the infrared transceiver device group includes a low-position infrared transceiver device group that is directly opposite to the Gray code channel on the front of the tape measure, and is connected to the The high-level infrared transceiver group on the back of the tape measure tape facing the Gray code channel; the low-level infrared transceiver group is turned on when the switch device is turned on, and the high-level infrared transceiver group remains in a standby or closed state; the lower three The gray code channels are the first gray code channel, the second gray code channel, and the third gray code channel; the low-position infrared transceiver group set on the side of the intelligent tape measure body facing the front of the tape measure tape includes three The infrared transceiver devices are respectively a first infrared transceiver device, a second infrared transceiver device and a third infrared transceiver device; the first infrared transceiver device is turned on when the switch device is placed in an open state, and the second infrared transceiver device and the third infrared transceiver device are turned on when the switch device is turned on. The three infrared transceivers are kept in a standby or off state; the starting point of the upper three-digit Gray code channel and the starting point of the lower three-digit Gray code channel are set in a staggered position. 2 . The smart tape measure with switch according to claim 1 , wherein the first infrared transceiver is facing the first gray code channel, and the second infrared transceiver is facing the second Gray code channel, the third infrared transceiver is facing the third gray code channel. 3 . The smart tape measure with switch according to claim 1 , wherein the upper three-digit Gray code channels are respectively the fourth gray code channel, the fifth gray code channel, and the sixth gray code channel. 4 . 4 . The smart tape measure with switch according to claim 3 , wherein the high-level infrared transceiver device group provided on the side facing the back of the tape measure tape in the smart tape measure body includes three infrared transceiver devices, which are the fourth infrared transceiver device. 5 . Infrared transceiver, fifth infrared transceiver and sixth infrared transceiver; wherein, the fourth infrared transceiver is facing the fourth gray code channel, and the fifth infrared transceiver is facing the fifth Gray code channel, the sixth infrared transceiver is facing the sixth gray code channel. 5. A data acquisition method of a smart tape measure with switch, characterized in that, the smart tape measure with switch described in any one of claims 1-4 is adopted, and the data acquisition method comprises the following steps: A. When it is detected that the switch device is in an open state, the low-level infrared transceiver group that is directly opposite to the gray code channel on the front of the tape measure tape is turned on, and real-time detection of whether the low-level infrared transceiver group has pulse generation; B. When the low-level pulse of the low-level infrared transceiver group is detected, the low-level infrared transceiver group and the high-level infrared transceiver group are both turned on, and when the tape measure tape is twitched, the real-time reading of the tape measure on the Gray code track reading; C. When detecting that the tape measure tape changes from a twitching state to a static state, obtain the current reading of the smart tape measure according to the first current reading obtained by the low-level infrared transceiver group and the second current reading obtained by the high-level infrared transceiver group. reading.

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