CN2679638Y

CN2679638Y - Digital display flexible rule having double sensors

Info

Publication number: CN2679638Y
Application number: CN 03250083
Authority: CN
Inventors: 李亚兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-25
Filing date: 2003-08-25
Publication date: 2005-02-16
Anticipated expiration: 2013-08-25

Abstract

The utility model relates to a digital display flexible rule having double sensors, comprising a rule band box, a mainspring, a singlechip and a display which are arranged in an outer shell. The digital display flexible rule having double sensors also comprises a code disc contacting sensor composed of a code disc and an electrical brush having a plurality of legs. The surface of the code disc is marked with a plurality of code channels composed of cyclic codes, and the code disc is fixed in the outer shell; one end of the electrical brush is fixed to the end surface of the ruler band box, and the legs of the electrical brush are elastically contacted with the code disc. The digital display flexible rule having double sensors also comprises a photoelectric sensor arranged in the outer shell; the installing positions of the light emitting diode and the photoelectric receiver of the photoelectric sensor are faced to the scale surface of rule band, and the scale surface of rule band is marked with black error correction stripes. The digital display flexible rule having double sensors has the advantages of visual display and accurate measurement.

Description

The dual sensor digital band tape

One, technical field

The utility model relates to length-measuring appliance, is the manufacturing field with tape measure of numeral demonstration specifically.

Two, background technology

Present mechanical band tape graduation resolution is millimeter, but the arithemetic unit of printing is centimetre, and the reading of millimeter unit can only rely on naked-eye observation to determine, the reading inconvenience is made mistakes easily.

Chinese patent literature discloses a kind of " multifunctional digital demonstration tape measure " (number of patent application 94110610), and it is by the mechanical drive control module, sensing unit, special IC module, circuit of display driving, compositions such as display.Its mechanical drive control module adopts chi band to utilize friction force to drive friction pulley to rotate or adopt perforation on the chi band and barbed gear to match and transmission, thereby the length that the chi band is pulled out changes electric signal into by sensing unit, after treatment, demonstrate measurement length with numeral.Its defective is the measurement result out of true of the wheeled transmission of above-mentioned friction; Secondly, the mechanical drive mode of chi band makes apparatus structure complicated, and volume is bigger.

Three, utility model content

The purpose of this utility model provides a kind of convenient reading, measures accurate dual sensor digital band tape.This novel purpose is achieved in that a kind of dual sensor digital band tape, comprise installation chi tape drum, chi band, clockwork spring, single-chip microcomputer, display in the enclosure, also comprise contact code-disc sensor: form by code-disc and brush with multi-feet, it is that the code-disc of reflected code is fixing in the enclosure that there are a plurality of code channels, code system in its surface, brush one end is fixed on the end face of chi tape drum, the pin of brush and code-disc Elastic Contact.Sign has black error correction striped on the chi band scale face in the described chi tape drum; Also comprise setting in the enclosure, its signal exports the photoelectric sensor of single-chip microcomputer to: be made up of light emitting diode and photelectric receiver, the installation site of light emitting diode and photelectric receiver is over against chi band scale face.In the above-mentioned design, it is transformed to electric signal by contact code-disc sensor with the rotation amount of chi tape drum, read black error correction striped on the chi band by photoelectric sensor, carry out error correction and calculate the length that the chi band is pulled out, finally be presented on the display screen with numeral by single-chip microcomputer.Basis is novel directly to show measurement result with numeral, convenient reading, directly perceived; The exclusive error correction of this novel employing makes measured value more accurate.The utility model also has the function that mechanical tape measure can't possess, as: data maintenance, optional position zero clearing, metric and English conversion, the add up size, a plurality of measured values of storage etc. of continuous coverage automatically.

Four, description of drawings

Fig. 1 is this novel front view;

Fig. 2 is the left view (section) of Fig. 1;

Fig. 3 is eight code channel code-discs, two brush situation synoptic diagram in parallel;

Fig. 4 is the synoptic diagram of eight code channel code-discs, single brush situation;

Fig. 5 is the synoptic diagram of chi band and photoelectric sensor.

Five, embodiment

Fig. 2 illustrates, chi tape drum 4 is installed in rotation in the shell 8, chi band 6 and clockwork spring 5 are installed in the outer ring and the inner ring of chi tape drum 4 respectively, referring to Fig. 5, chi band 6 is marked with scale mark and black error correction striped 12, photoelectric sensor 1 is installed in the shell 8, and the light emitting diode 14 of photoelectric sensor 1 and the installation site of photelectric receiver 13 are over against chi band 6 scale faces; Contact code-disc sensor is made up of code-disc 10 and brush 11, and referring to Fig. 3 Fig. 4, code-disc 10 is fixed in the shell 8, the code system of code-disc 10 is a reflected code, and code channel number 4-12, brush 11 has 5-15 pin, brush one end is fixed on chi tape drum 4 end faces, the pin of brush and code-disc Elastic Contact.Can adopt eight code channel code-discs shown in Figure 4 and single brush combined, also can adopt eight code channel code-discs shown in Figure 3 and two in parallel uses of brush.The signal of contact code-disc sensor and photoelectric sensor all exports single-chip microcomputer 16 (single-chip microcomputer 16 is installed in code-disc 10 back sides) to, demonstrates measurement result at last on display screen 7 (LCDs is installed in shell 8 window places).Among Fig. 1, chi strap brake mechanism is made up of brake block 2, brake key 3 and spring 15, and brake key 3 is hinged through pin joint 3a with chi tape drum 4, and spring 15 is arranged between brake key medial surface and the shell 8; Brake block 2 lower ends (for orientation among Fig. 1, down with) contact with chi band 6, and the column cap on its top is enclosed among the bayonet socket on the key 3 that brakes.

During use, pin brake key 3, brake block 2 is lifted, then chi band 6 is pulled out shell 8, chi tape drum 4 and brush 11 rotate, this moment, the clockwork spring 5 of chi tape drum 4 inner rings was tightened up, along with relatively rotating of brush 11 and code-disc 10, brush 11 alternately touches the conduction and the insulation position of code-disc 10, the current potential of contact changes, the rotation amount of chi tape drum 4 has become digital signal, when the black error correction striped on the chi band 6 12 passed through photoelectric sensor 1, the output level on the photoelectric sensing 1 changed simultaneously, thereby the exact length that chi band 6 is pulled out is input to single-chip microcomputer, twine the uneven error that causes and calculate the exact length that chi band 6 is pulled out by single-chip microcomputer modifying factor chi band, finally be presented on the liquid crystal display.Because the spacing of error correction striped is very big, be generally tens to several thousand millimeters, have only when error correction striped 12 during near photoelectric sensor 1 photoelectric sensor 1 just start working, in case error correction striped 12 is by photoelectric sensor 1, photoelectric sensor 1 quits work at once, therefore greatly reduces power consumption.As need fixed ruler band 6, brake key 3 can be unclamped, spring 15 is in free state, makes brake block 2 withstand chi band 6, otherwise under clockwork spring 5 spring force effects, chi band 6 is withdrawn in the shell 8 automatically.Use as need and to add up automatically, data keep, the metric and English conversion, functions such as reading direction transformation, a plurality of measured values of storage, can be respectively by each function key 9 (be installed in the key hole of shell 8 and contact) realization with code-disc 10 back sides.

Claims

1, a kind of dual sensor digital band tape, comprise installation chi tape drum, chi band, clockwork spring, single-chip microcomputer, display in the enclosure, it is characterized in that, also comprise contact code-disc sensor: form by code-disc (10) and brush (11) with multi-feet, it is that the code-disc (10) of reflected code is fixed in the shell (8) that there are a plurality of code channels, code system in its surface, brush (11) one ends are fixed on the end face of chi tape drum (4), the pin of brush and code-disc (10) Elastic Contact; Sign has black error correction striped (12) on chi band (6) the scale face in the described chi tape drum (4); Also comprise setting in the enclosure, its signal exports the photoelectric sensor of single-chip microcomputer (16) to: be made up of light emitting diode (14) and photelectric receiver (13), the installation site of light emitting diode (14) and photelectric receiver (13) is over against chi band (6) scale face.

2, digital band tape according to claim 1 is characterized in that, there is 4-12 code channel on described code-disc (10) surface, and described brush (11) has 5-15 pin, and described brush (11) can be 1 to be used separately or two in parallel uses.

3, digital band tape according to claim 1 is characterized in that, the spacing of the black error correction striped on the chi band is very big, is tens to several thousand millimeters.

4, digital band tape according to claim 2 is characterized in that, there are 8 code channels on described code-disc (10) surface, and described brush (11) is two.

According to claim 1 or 2 or 3 described digital band tapes, it is characterized in that 5, the display screen of described display (7) is installed in the window place of shell (8); The function key of described single-chip microcomputer (9) is installed in the key hole of shell (8), and contacts with code-disc (1) back side.