Electronic measuring tape and a length measuring device provided therewith
First Claim
1. An electric measuring tape comprising an external housing provided with a tape exit opening, comprising:
- a tape winding-up device,a tape wound up in the tape winding-up device and withdrawable from the external housing through the tape exit opening, the tape having a first surface and a second surface,a radiation source arranged between the tape exit opening and the tape Winding-up device, for sending a beam onto the first surface of the tape, anda detector assembly placed at the side of the second surface of the tape, for receiving the beam and outputting data representing the received radiation to an evaluation device for determining the length of the tape extracted through the tape exit opening,wherein the tape is radiation-permeable and is provided with a biunique code on one of the two surfaces thereof, the code representing the length of the tape extracted through the tape exit opening and comprising elements which influence the radiation-transmitting capacity of the tape, and wherein the detector assembly is configured to determine the length of the tape extracted without continuous activation of the radiation source.
1 Assignment
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Accused Products
Abstract
The invention relates to the simple and low-cost production of an electronic measuring tape (10) comprising an external housing (12) provided with a tape exit opening (14), a tape winding-up device (20), a tape (30) which is wound up in the tape winding-up device (20) and is withdrawable from the external housing (12) through the tape exit opening (14), wherein said tape is provided with first and second surfaces. A radiation source (50) is arranged between the tape exit opening (14) and the tape winding-up device (20) for sending a beam to the first surface of the tape (30). A detecting device (60) is placed at the side of the second surface of the tape (30) for receiving the beam and transmitting data representing the received radiation to an evaluation device (70) for determining, from these data, the length of the tape (30) extracted through the tape exit opening (14). According to said invention, the tape (30) is radiation-permeable and provided with a biunique code (40) on one of the two surfaces thereof. Said code represents the length of the tape (30) extracted through the tape exit opening (14) and consists of elements influencing the radiation-transmitting capacity of the tape (30).
Said invention also relates to an electronic length-measuring device provided with display and evaluation means for determining a length according to received data and for generating visual data according to said length on the display means, wherein said measuring tape (10) is connected to the evaluation unit.
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Citations
11 Claims
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1. An electric measuring tape comprising an external housing provided with a tape exit opening, comprising:
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a tape winding-up device, a tape wound up in the tape winding-up device and withdrawable from the external housing through the tape exit opening, the tape having a first surface and a second surface, a radiation source arranged between the tape exit opening and the tape Winding-up device, for sending a beam onto the first surface of the tape, and a detector assembly placed at the side of the second surface of the tape, for receiving the beam and outputting data representing the received radiation to an evaluation device for determining the length of the tape extracted through the tape exit opening, wherein the tape is radiation-permeable and is provided with a biunique code on one of the two surfaces thereof, the code representing the length of the tape extracted through the tape exit opening and comprising elements which influence the radiation-transmitting capacity of the tape, and wherein the detector assembly is configured to determine the length of the tape extracted without continuous activation of the radiation source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electronic lengthmeasuring device comprising:
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a display, an evaluation device for determining a length dimension for display, and an electronic measuring tape connected to the evaluation device wherein the electronic measuring tape comprises a tape winding-up device, a tape wound up in the tape winding-up device and withdrawable from the external housing through the tape exit opening, the tape having a first surface and a second surface, a radiation source arranged between the tape exit opening and the tape winding-up device, for sending a beam onto the first surface of the tape, and a detector assembly placed at the side of the second surface of the tape, for receiving the beam and outputting data representing the received radiation to the evaluation device for determining the length of the tape extracted through the tape exit opening, wherein the tape is radiation-permeable and is provided with a biunique code on one of the two surfaces thereof, the code representing the length of the tape extracted through the tape exit opening and comprising elements which influence the radiationtransmitting capacity of the tape, and wherein the detector assembly is configured to determine the length of the tape extracted without continuous activation of the radiation source. - View Dependent Claims (11)
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Specification