WO2019024133A1 - 数字卷尺 - Google Patents

数字卷尺 Download PDF

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Publication number
WO2019024133A1
WO2019024133A1 PCT/CN2017/097470 CN2017097470W WO2019024133A1 WO 2019024133 A1 WO2019024133 A1 WO 2019024133A1 CN 2017097470 W CN2017097470 W CN 2017097470W WO 2019024133 A1 WO2019024133 A1 WO 2019024133A1
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Prior art keywords
grid
tape
sensor
tape measure
digital
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PCT/CN2017/097470
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English (en)
French (fr)
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王振兴
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王振兴
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Priority to US16/480,317 priority Critical patent/US11199391B2/en
Publication of WO2019024133A1 publication Critical patent/WO2019024133A1/zh

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10Measuring tapes
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10Measuring tapes
    • G01B3/1061Means for displaying or assisting reading of length measurement
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10Measuring tapes
    • G01B3/1041Measuring tapes characterised by casings
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10Measuring tapes
    • G01B3/1061Means for displaying or assisting reading of length measurement
    • G01B3/1069Electronic or mechanical display arrangements

Definitions

  • the invention belongs to the technical field of measuring tools, and relates to a tape measure, in particular to a digital tape measure.
  • the tape measure requires the scale reading on the artificial tape measure when measuring the length. For the general use place, since the precise value is not needed, the measurement time is not affected, and the existing tape measure can basically meet the demand. However, in the case where the measurement accuracy is high, the measurement of the tape measure is generally not convenient and accurate, and it is inconvenient to record and read.
  • the utility model also comprises a grid plate, a grid detector, a circuit board and a display screen.
  • the grid plate is fixedly rotated on the tape cassette, and a circle grid is arranged around the circle of the grid plate, and the grid disk and the grid rotate.
  • the grid detector generates a detection signal for rotating the grid disk, and the length of the tape pull-out is obtained by the calculation of the detection signal through the circuit board, and is displayed on the display screen.
  • the grid detector is a capacitive grid sensor
  • the grid is a moving scale of a capacitive sensor with a circumferentially evenly arranged arrangement
  • the fixed scale of the capacitive grid sensor is fixed on the housing.
  • the capacitive gate sensor is connected to the circuit board.
  • the grid disk is further provided with a zero detecting portion, and a sensor matched with the zero detecting portion is disposed in the housing, and the sensor may be a capacitive sensor, a grating sensor or Hall sensor.
  • FIG. 1 is a structural view of a digital tape measure in the first embodiment of the present invention.
  • Figure 2 is a side elevational view of the tape cassette of the digital tape measure in the first embodiment of the present invention.
  • the digital tape measure comprises a battery 80, a button 81 and a tape locking mechanism.
  • the battery is installed in the casing to supply power for the display screen, the circuit board and the detecting sensor, and the button is connected with the circuit board to input an operation command to the tape measure.
  • the tape locking mechanism includes a locking key 82, a spring piece 83 and a brake pad 84.
  • the locking key is movably mounted on the housing, and the spring piece supports the locking key.
  • the brake pad is pressed or loosened by the locking key to loosen or loosen the tape box and the ruler. band. Locking structure of the ruler When the locking button is pressed, the brake pad is opened and the tape is automatically retracted. When the tape is pulled out, the brake pad is taken out at the same time, and the spring piece is compressed to ensure that the tape does not get stuck.
  • the structure is such that the grating sensor in the first embodiment is replaced with the Hall sensor 200, and the grid on the corresponding grid disk is a plurality of magnetically uniformly arranged circumferences.
  • the magnetic device is made of a magnet, and the Hall sensor generates a high-low level change signal to the circuit board by detecting the magnetic change generated by the magnetic device when the grid disk rotates, and the length of the tape pull-out is obtained by calculation of the circuit board. And displayed on the display.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tape Measures (AREA)

Abstract

一种数字卷尺,包括壳体(10)、尺带(20)和尺带盒(30),壳体(10)内部设有卷轴(11),尺带盒(30)安装在卷轴(11)上转动,尺带(20)绕卷在尺带盒(30)上,在尺带(20)的前端设有挂钩(21);还包括有栅格盘(40)、栅格检测器(50,200,300)、电路板(60)和显示屏(70),栅格盘(40)固定在尺带盒(30)上转动,在栅格盘(40)的圆周边设有一圈栅格(41),栅格盘(40)与栅格(41)的转动使栅格检测器(50,200,300)生成栅格盘(40)转动的检测信号,利用检测信号通过电路板(60)的计算得到尺带(20)拉出的长度,并在显示屏(70)上显示。该数字卷尺可以在测量精度要求高的场合准确地测量,并且读数方便。

Description

数字卷尺 技术领域
本发明属于测量工具技术领域,涉及一种卷尺,具体是涉及一种数字卷尺。
背景技术
卷尺是日常生活中很常用的测量工具,按材料不同可分为纤维卷尺,布卷尺和钢卷尺等,常见的卷尺大多数是钢尺或者布尺,大家经常看到的是钢卷尺,建筑和装修常用,也是家庭必备工具之一。
卷尺在测量长度的时候需要人为的读尺带上的刻度读数,对于一般的使用场所,由于不需要精确的数值,测量时间也不受影响,现有的卷尺基本可以满足需求。但是在测量精度要求高的场合,一般卷尺测量不够方便准确,不方便记录和读数。
发明内容
本发明的目的是提供一种数字卷尺,可直接显示测量读数,方便使用及记录和读数。
为达到上述目的,本发明所采用的技术方案如下:
提供一种数字卷尺,包括壳体、尺带和尺带盒,壳体内部设有卷轴,尺带盒安装在卷轴上转动,尺带绕卷在尺带盒上,在尺带的前端设有挂钩;
还包括有栅格盘、栅格检测器、电路板和显示屏,栅格盘固定在尺带盒上转动,在栅格盘的圆周边设有一圈栅格,栅格盘与栅格的转动使栅格检测器生成栅格盘转动的检测信号,利用检测信号通过电路板的计算得到尺带拉出的长度,并在显示屏上显示。
当用户拉挂钩将尺带拉出,此时尺带盒和栅格盘转动,栅格检测器的检测信号交变,输出高低电平变化的信号给电路板,由于栅格盘上的栅格之间的间距是已知的,所以每变化一格栅格就可以知道尺带拉出的距离,通过电路板上芯片处理来自栅格检测器的交变信号,计算出距离并输出到显示屏上显示。
尺带从零位开始拉出的是第n圈,即栅格盘转到第n圈,现在栅格检测器检测到栅格盘上的对应的栅格数为M,栅格盘每一圈的对应的栅格个数为S,设第1圈尺带长度为L1,第2圈尺带长度为L2,依次类推,得到尺带拉出的长度:
L=L1+L2……+L(n-1)+(Ln/S*M)
其中,尺带拉出的每一圈都是预先测量存储的,为已知长度,通过栅格检测器只需检测栅格盘当前处于的圈数及栅格数,就可以用上述公式直接计算结果。
在上述技术方案的一个实施例中,所述栅格为数个圆周均匀排布的通孔,所述栅格检测器为光栅式传感器,光栅式传感器的光源和光电元件分别设置在通孔的两侧,光源发出的光可以经通孔被光电元件接收。
在上述技术方案的一个实施例中,所述栅格检测器为容栅传感器,栅格为圆周均匀排布的容栅传感器的动栅尺,容栅传感器的定栅尺固定在壳体上,容栅传感器与电路板连接。
在上述技术方案的一个实施例中,所述栅格检测器为霍尔传感器,所述栅格为数个圆周均匀排布的磁性器件,霍尔传感器通过检测栅格盘转动时磁性器件产生的磁性变化生成检测信号输出给电路板。
在上述技术方案的一个实施例中,所述栅格盘上还设置有零位检测部,在壳体内设置有与零位检测部相配合的传感器,传感器可以是容栅传感器、光栅式传感器或霍尔传感器。
在上述技术方案的一个实施例中,所述的栅格盘为两个,相互平行设置并与尺带盒固定。
在上述技术方案的一个实施例中,还包括有电池和按键,电池安装在壳体内,为显示屏、电路板及检测传感供电,按键与电路板连接,对卷尺进行操作指令输入。
在上述技术方案的一个实施例中,还包括有尺带锁定机构,尺带锁定机构包括锁定键、弹簧片和刹车片,锁定键活动安装在壳体上,弹簧片支撑锁定键,刹车片在锁定键的带动下压紧或松开尺带盒及尺带。
在上述技术方案的一个实施例中,所述尺带盒与卷轴之间设有轴承,所述尺带盒设有回转机构,回转机构为卷簧。
附图说明
图1是本发明实施例一中的数字卷尺的结构视图。
图2是本发明实施例一中的数字卷尺的尺带盒的的侧面视图。
图3是本发明实施例一中的数字卷尺的栅格盘与检测器的局部视图。
图4是本发明实施例二中的数字卷尺的栅格盘与检测器的局部视图。
图5是本发明实施例三中的数字卷尺的栅格盘与检测器的局部视图。
具体实施方式
以下结合附图与具体实施例对本发明的技术方案做详细的说明,以使本领域的技术人员能清楚完整的理解本发明的内容。
参照图1、图2与图3所示,本发明的实施例一是一种数字卷尺,包括有壳体10、尺带20、尺带盒30、栅格盘40、光栅式传感器50、电路板60和显示屏70,壳体内部设有卷轴11,尺带盒安装在卷轴上转动,尺带绕卷在尺带盒上,在尺带的前端设有挂钩21;栅格盘固定在尺带盒上转动,在栅格盘的圆周边设有一圈栅格41。
栅格为数个围绕圆周均匀排布的通孔,光栅式传感器包括有光源51和接收的光电元件52,光源和光电元件分别设置在通孔的两侧,光源发出的光可以经通孔被光电元件接收,激发生成一个高电平信号,栅格盘转到到离开通孔后,光源发出的光被栅格盘阻挡,此时光电元件接收无法接收光,激发生成一个低电信号,栅格盘转动会产生信号交变,高低电平信号交替变化,每产生一个高电平信号就是经过一个栅格,通过电路板的计算得到尺带拉出的长度,并在显示屏上显示。
为了设别尺带盘是转动方向,在尺带盒上设置了两个栅格盘,并且相应的配置了光栅式传感器,两个栅格盘相互平行设置并与尺带盒固定。因两个栅格盘采用正反交错方式,在通过处理器对两个传感器的信号判定,可以确定尺带是拉出还是收回。(
栅格盘上设置有零位检测口42,在壳体内设置有与零位检测口相配合的光栅传感器51,零位检测口作为栅格盘的零位初如位置。
数字卷尺包括有电池80、按键81和尺带锁定机构,电池安装在壳体内,为显示屏、电路板及检测传感供电,按键与电路板连接,对卷尺进行操作指令输入。
尺带锁定机构包括锁定键82、弹簧片83和刹车片84,锁定键活动安装在壳体上,弹簧片支撑锁定键,刹车片在锁定键的带动下压紧或松开尺带盒及尺带。尺带的锁定结构当锁定键按下,刹车片弹开,尺带自动收回,带尺带拉出时,刹车片同时带出,同时会压缩弹簧片,保证尺带不会卡住。
尺带盒与卷轴之间设有轴承12,尺带盒设有回转机构,回转机构为卷簧,卷簧在图中未示出。
参照图4所示,本发明的实施例二中,其结构为将实施例一中的光栅式传感器替换为霍尔传感器200,相应的栅格盘上的栅格为数个圆周均匀排布的磁性器件201,磁性器件采用磁铁制成,霍尔传感器通过检测栅格盘转动时磁性器件产生的磁性变化生成高低电平的变化信号输出给电路板,通过电路板的计算得到尺带拉出的长度,并在显示屏上显示。
参照图5所示,本发明的实施例三中,其结构为将实施例一中的光栅式传感器替换为 容栅传感器300,相应的,栅格盘上的栅格为圆周均匀排布的容栅传感器的动栅尺301,容栅传感器的定栅尺302固定在壳体上,容栅传感器与电路板连接,栅格盘转动时容栅传感器感应到位移变化,对栅格进行计数,通过电路板的计算得到尺带拉出的长度,并在显示屏上显示。
上实施例为本发明的优选实施例,本发明不限于上述实施例,对于本领域普通技术人员而言,在不背离本发明技术原理的基础上所做的任何显而易见的改动,都属于本发明的构思和所附权利要求的保护范围。

Claims (9)

  1. 一种数字卷尺,包括壳体、尺带和尺带盒,壳体内部设有卷轴,尺带盒安装在卷轴上转动,尺带绕卷在尺带盒上,在尺带的前端设有挂钩;
    还包括有栅格盘、栅格检测器、电路板和显示屏,栅格盘固定在尺带盒上转动,在栅格盘的圆周边设有一圈栅格,栅格盘与栅格的转动使栅格检测器生成栅格盘转动的检测信号,利用检测信号通过电路板的计算得到尺带拉出的长度,并在显示屏上显示。
  2. 根据权利要求1所述的数字卷尺,其特征在于,所述栅格为数个圆周均匀排布的通孔,所述栅格检测器为光栅式传感器,光栅式传感器的光源和光电元件分别设置在通孔的两侧,光源发出的光可以经通孔被光电元件接收。
  3. 根据权利要求1所述的数字卷尺,其特征在于,所述栅格检测器为容栅传感器,栅格为圆周均匀排布的容栅传感器的动栅尺,容栅传感器的定栅尺固定在壳体上,容栅传感器与电路板连接。
  4. 根据权利要求1所述的数字卷尺,其特征在于,所述栅格检测器为霍尔传感器,所述栅格为数个圆周均匀排布的磁性器件,霍尔传感器通过检测栅格盘转动时磁性器件产生的磁性变化生成检测信号输出给电路板。
  5. 根据权利要求1所述的数字卷尺,其特征在于,所述栅格盘上还设置有零位检测部,在壳体内设置有与零位检测部相配合的传感器,传感器可以是容栅传感器、光栅式传感器或霍尔传感器。
  6. 根据权利要求1所述的数字卷尺,其特征在于,所述的栅格盘为两个,相互平行设置并与尺带盒固定。
  7. 根据权利要求1所述的数字卷尺,其特征在于,还包括有电池和按键,电池安装在壳体内,为显示屏、电路板及检测传感供电,按键与电路板连接,对卷尺进行操作指令输入。
  8. 根据权利要求1所述的数字卷尺,其特征在于,还包括有尺带锁定机构,尺带锁定机构包括锁定键、弹簧片和刹车片,锁定键活动安装在壳体上,弹簧片支撑锁定键,刹车片在锁定键的带动下压紧或松开尺带盒及尺带。
  9. 根据权利要求1所述的数字卷尺,其特征在于,所述尺带盒与卷轴之间设有轴承,所述尺带盒设有回转机构,回转机构为卷簧。
PCT/CN2017/097470 2017-08-02 2017-08-15 数字卷尺 WO2019024133A1 (zh)

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CN201710653123.9A CN107388914A (zh) 2017-08-02 2017-08-02 数字卷尺

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