CN1073280A - The starter gear of scanner - Google Patents
The starter gear of scanner Download PDFInfo
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- CN1073280A CN1073280A CN 91111543 CN91111543A CN1073280A CN 1073280 A CN1073280 A CN 1073280A CN 91111543 CN91111543 CN 91111543 CN 91111543 A CN91111543 A CN 91111543A CN 1073280 A CN1073280 A CN 1073280A
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- mark
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Abstract
The present invention relates to be used to detect universal product mark or the starter gear and the startup method of the photoelectric scanner of other marks, particularly a kind of scanner arbitrarily.For impelling scanner, the particularly technical progress of slit scan device and desk-top workstation the invention provides when scanner and at all reads less than mark and reached defined during the time, stops scanner automatically and starts the apparatus and method of scanner thereafter.Mainly be at scanning window place the shadow photoelectric sensor to be set, its effect mainly is to be that the light intensity on every side that detects scanning window place changes, and restarts scanner by the variation that this detects, and this device can be stopped automatically and start mark automatically and read work.
Description
The present invention relates to be used to detect omnipotent goods sign indicating number mark or the photoscanner's of other marks, particularly a kind of scanner starter gear and startup method arbitrarily.
Existing photoscanner, particularly slit scan device when in the official hour interscan during less than mark, for example 30 minutes, in service time not, in time turn off motor and lasing light emitter; When needs are restarted, utilize the mechanical button switch connection by operating personnel; Another scanner is to adopt independent light source to optical receiver transmission light beam, when occurring the mark that will scan on the light path in beam Propagation, just powers with motor to lasing light emitter and scanning again.The problem that this set brings is, is difficult to guarantee the mutual coupling between optical transmitting set and the optical receiver.Other most slit scan devices are worked in a continuous manner, that is to say, as long as to the scanner power supply, lasing light emitter and motor just are being activated continuously.
The objective of the invention is to promote the particularly technical progress of slit scan device and desk-top workstation of scanner.Overcome the weak point that above-mentioned scanner exists, get rid of the mechanical type opening and closing switch that is provided with when restarting scanner; After scanner was closed, when detected mark passed through scanning window, scanner can be activated exactly.
Another object of the present invention is to keep finishing the omnibearing scanning to mark to be measured under the minimum situation of light intensity and electric energy loss.
A further object of the present invention is at any time the heat conduction of laser emission part-produce at work as laser diode to be distributed in device, to prolong its serviceable life.
In order to reach these purposes, major technique measure of the present invention is to utilize the detection to the strong variation of ambient light (shadow light) to start scanner.
The effect of this scanner is to read the mark that each several part has different light reflectivities, for example read bar code, bar code has with the separated at interval mutual dark bright fringes of the light of variable-width, scanner comprises casing and is positioned at the transmitter that casing produces incoming laser beam, transmitter includes the lasing light emitter of semiconductor laser diode, and this lasing light emitter can produce human eye at least just can observable laser.Transmitter also includes the optics of installing in the casing, this optics forms incoming laser beam, transmitter when work along light path to being placed on the emission of the mark in certain operating distance scope incoming laser beam apart from casing, laser beam is reflected by mark, and folded light beam turns back to the casing direction by mark; Optical module carries out the optics correction and by deciding spot size laser beam is focused near the reference plane window laser beam.
Fetch unit also includes with sweep unit comprehensive or that the rectilinear scanning mode scans mark, desirable embodiment is that this sweep unit includes output shaft, on this output shaft, motor is arranged, it can make the polygonal body of a band minute surface rotate around axle, disposes a plurality of fixing catoptrons around this axis; Laser beam incident by one of them mirror reflects, arrives mark then behind a side mirror of polygonal body.The laser that is reflected is sent on the catoptron at least, again after the side mirror reflection by polygonal body, incide the receiver parts, for example this receiver is one or more photodiode, can detect the electric signal of the visible light light intensity and the variable intensity that the generation expression is detected of whole visual field reflection during their work, this signal generally is a simulating signal.
Scanner also includes the A/D figure signal processing element that analog signal processing is become digital signal, also include digital signal is become the decoding parts of expressing the decoded signal that reads mark, control microprocessor has determined that mark during correct decoding, stops reading signal.Control microprocessor and the data storage device synchronization action of storing each decoded signal.Control microprocessor also reading less than mark and arriving defined during the time, is closed scanner, thereby is prolonged the life-span of laser diode and sweep motor.So, the more detailed content of scanner is documented in the United States Patent (USP) with common assignee of the present invention, and these United States Patent (USP)s are the 4th, 251, No. 798, the 4th, 369, No. 361, the 4th, 387, No. 297, the 4th, 409, No. 470, the 4th, 816, No. 660, the 4th, 896, No. 026.These all are cited as the reference of this paper.
The slit scan device in use, casing is contained on the counter top of general planar.Casing have one with counter top at conplane scanning window, emission laser and reflector laser are mutually in the opposite direction by this window.At the scanner duration of work, scanning is during less than mark, and through time of defined, for example through after 30 minutes, not between the operating period, just turns off motor and lasing light emitter.When needs, restart motor and lasing light emitter.
Scanning starting device of the present invention comprises: read the parts of mark with the electrooptics means, the each several part of mark has different light reflectivities, utilizes this catoptrical strong and weak identification sign that changes; Stop the parts of the work of reading, when reading at the appointed time, promptly stop the work of reading less than mark; Be installed in the surrounding light sensor at scanning window place in addition, the light intensity that it is used for the detection window place changes, and restarts mark by its testing result and reads work.This sensor has the parts to the fetch unit power supply.
The step of the method for this invention is: make the mark that contains different light reflectivities part by exposing the window in the light around to the open air, and read this mark with the electrooptics method; When reading, and when having reached the time of defined, then stop read step less than mark; Light intensity around the detection window place, and corresponding this detection limit begins read step again.
Fetch unit comprises: by the transmitter of scanning window, receive its catoptrical receiver to the mark emission of lasering beam, and this transmitter, receiver and above-mentioned sensor all are arranged on the same side of scanning window; According to concrete operating position, sensor also can be arranged on the opposite side of scanning window.Fetch unit also comprises mark is carried out the sweep unit that comprehensive scan mode scans.For realizing the comprehensive scanning to mark, the composition of sweep unit includes and can reach a plurality of catoptrons that are contained near axis around the rotating polygonal body that minute surface is housed of axis.
According to the present invention, surrounding light sensor parts for example shadow photoelectric sensor are arranged on by launching the same window place of laser and reflector laser.The light intensity on every side that the shadow photoelectric sensor is used for the detection window place changes, and when detecting variation, begins to read mark again.Photoelectric sensor detects light intensity on every side, can be to the scanning of electric lasing light emitter or electric with motor or to both power supplies with cut off its power supply.
In an embodiment, on the shadow photoelectric sensor, connecting a pair of peak voltage detector.When window is exposed to ambient light steady state (SS) following time, each peak voltage detector is filled different voltage with to each capacitor respectively, when light intensity comparison around the window place resembles quality testing when knowing that state threshold hang down, with the different ratio of different voltage each capacitor is discharged.Like this when the object of subsidiary mark passes through above the window, shadow that it produces or the reduction of window place illuminance are just detected by the shadow photoelectric sensor, begin again to power with motor or to both, and again the mark that is presented on the window place object is scanned to lasing light emitter or scanning.Because used single window, note preventing dust, liquid and this window of other contaminants.
Another feature of the present invention is that cooling measure has been taked in the diode laser source, and laser diode is responsive to temperature.Therefore in order to improve the reliability of action, the present invention is directly conducted heat with the good housing of thermal conductivity that metal or same material are done.Housing has a metallic top board that is contained in scanning window and the same plane of sales counter, and this top board is exposed in the surrounding environment, is convenient to dispel the heat towards periphery.
In desirable embodiment, around the axis of the polygonal body that minute surface is housed, only disposing to equal angles 3 catoptrons.To being read the mark throw light, light is reflected by mark thus, and light is by twice of reflecting surface reflection around here.So just electric energy loss bottom line may be limited in, and the optical instrument of low price may be used.
From so-called " independent flexibly ", the shadow photoelectric sensor is contained in the base of workstation in addition, and this base is to be contained on the sales counter plane, and scanner head is housed above the base.Aforesaid transmitter and receiver are contained in the scanner head.Surrounding light sensor is contained near the scanning window that the object of subsidiary mark passes through the base.Ideal situation is that scanner head makes the pistol-like housing.And adopt the form be suitable for dual-purpose, and can also can regard handheld scanner usefulness by taking off on the base, perhaps be contained on the base as workstation, take, put all very convenient.
During with the shadow photoelectric sensor, object there is no need to detect with independent optical transmitting set and optical receiver on workstation the time.
Effect of the present invention: close and open scanner in official hour when this device reads less than mark automatically, thereby can prolong the life-span of scanner with motor, close and start without the manually-operated scanner, this device is not because power supply is continuous power supply, the reasonable arrangement of photoelectric device, so electric energy loss is low, and, the electric elements long service life.
In conjunction with the accompanying drawings embodiments of the invention are described as follows:
Fig. 1 is the cut-away section synoptic diagram of the present invention by the slit scan device of ambient light substrate pick-up unit startup.
Fig. 2 is the present invention, the cut-away section synoptic diagram of the sales counter workstation that is started by ambient light substrate pick-up unit.
Fig. 3 is the present invention, shadow photoelectric sensor that light intensity changes around detecting and the circuit diagram that is mated.
Symbol description:
10 slit scan devices, 12 sales counters, 14 casings
16 top boards, 18 scanning windows, 20 laser diodes
22 lasing light emitter regulators, 24 heating radiators, 26 collector lenses
28 diaphragms, 30 light paths, 32 holes
34 light collecting lenss, 36 catoptrons, 38 polygonal bodies
40 scannings motor 42 motor powers 48 objects
50 photoelectric sensor 52A/D transducers, 54 demoders
56 control microprocessor, 58 data storage cells, 60 shadow photoelectric sensors
62 shadow detector circuits, 64 bases
66 sales counters, 68 upright brackets, 70 mountings
72 bodies, 74 handwheel shape scanner heads, 76 plate machines
78 objects, 80 scanning windows, 82 amplifiers
84 the 1st peak detctors 86 the 2nd peak detctor, 88 comparers
Fig. 1, expression is used in the slit scan device 10 on the common supermarket accounting sales counter, and it is installed on the sales counter 12 of smooth pattern.Scanner is used to read the mark on the object such as picture food, is meant to light that in the meaning of this " mark " laser for example has the bright dark alternate striped or the group echo of different reflectivity.This mark can be omnipotent goods sign indicating number (UPC) mark or other marks, for example Code 39, Codabar, Interleaved 2 of 5 etc. arbitrarily.Mark can be any Roman character or numeral or be made up of both.Its all or at least a portion and background had the mark of different light reflectivities when the meaning of " mark " term also referred to place background.Utilize back one definition to read mark, for robot and object identification field advantageous particularly.
Among Fig. 1, scanner includes the casing 14 of the box-shaped that a metal material makes, this casing have a general planar sales counter plane 12 and with it at conplane top board 16.The scanning window 18 of printing opacity also with top board 16 in same plane and be contained on the casing 14.
A plurality of electric and opticses are installed in the below casing 14 on frame platform plane 12.One of them is a lasing light emitter, and for example it is a semiconductor laser diode 20, and it is used for transmitted wave and is about the laser beam of 670nm to 680nm, but this is in the human eye range of view.This laser-beam divergence is multiple divergent shape on the very big and rectangular all planes of direction of beam propagation.Diode can be launched continuous-wave mode or pulse wave signal, supplies with suitable low-voltage by lasing light emitter regulator 22, and for example 5 volts of direct currents or direct current are 12 volts.Heating radiator 24 is in laser diode and metal chassis 14 and is convenient to the heat conduction state, and the heat of during work diode being sent passes to top board 16.Top board 16 is because be exposed in the surrounding environment, and heat is distributed by it.
In the distance of laser beam process, condenser lens 26 and diaphragm 28 are arranged, they make laser beam form the hot spot of required size near the reference plane the scanning window 18 in order to the laser beam of dispersing is carried out the optics correction.Window 18 is the marks that are used on the reading object thing, this object mark contact or depart from window a little.Lens 26 and diaphragm 28 also make laser beam spread along light path 30 by the hole 32 that light collecting lens 34 forms.Diaphragm 28 has the xsect xsect about equally with the laser beam at this place, makes the major part of laser beam pass through condenser lens, diaphragm successively along light path 30, makes to mark and spreads energy loss minimum in the way.The shape of the xsect of diaphragm wishes it is rectangle or ellipse, and under this occasion, rectangle or oval-shaped major axis are consistent with the angle of divergence of laser beam maximum, so that transmit more energy to mark.
On laser beam incident by hole 32 in a plurality of catoptrons 36 that are contained in around the polygonal body 38.Sweep motor 40 drives polygonal body 38 and rotates around axis.Motor power 42 is connected with motor 40.Catoptron 45,44,46 five equilibrium angle configurations around the axis of rotation of polygonal body that a plurality of (ideal is 3) are fixing.The laser beam of a direct reflection from the polygon somascope is delivered on the minute surface in the fixing catoptron, sends by scanning window 18 again.
Laser beam is reflected as partial reflection light in a direction by the mark on the object 48, and in a lot of directions as being scattering into sub reflector.Part by scanning window 18 is a returning part with emission laser opposite direction in these scattered lights, because each each several part of mark has different light reflectivities on the object 48, so returning part has variable intensity.The face that the returning part of folded light beam is at least in the minute surface 36 of a catoptron and polygonal body 38 reflects, and for 34 optically focused of lens, delivers to receiver photoelectric sensor 50.Photoelectric sensor 50 is along the direction of scanning to mark, and best detection extends to the variable intensity of the light-concentrating laser that whole visual field transmits to surmounting it.Photoelectric sensor 50 produces the electric analoging signal that characterizes detected variable intensity.With A/D transducer 52 this simulating signal is transformed to digital video signal.Demoder 54 is translated into decoded signal with digital video signal again.United States Patent (USP) the 4th, 251 discloses such signal processing apparatus No. 798.Control microprocessor 56 becomes the data of expressing mark with data storage part 58 with decoded signal with the algorithm process that comprises software program.Control microprocessor 56 judges after mark decoding, and in view of the above, stops to read signal.
When scanner reads fully less than mark, and when having reached the time of defined, for example through 30 minutes, control microprocessor 56 is then closed scanner, and this is with to laser diode 20 or motor 40 or one of in both, and outage realizes.
Decoded signal can be stored in the storer 58 partly, also can deliver to the large-capacity data storehouse of remote principal computer.
Other also can be obtained by storer or principal computer as the retail pricing information for information about.
According to the present invention, surrounding light sensor or shadow photoelectric sensor 60 are arranged on to mark emitted laser or the same window 18 places of being passed through by the laser that mark is returned.Represent photoelectric sensor 60 in detail as Fig. 3, be electrically connected mutually with shadow testing circuit 62.This shadow testing circuit 62 also is electrically connected mutually with Laser Power Devices 22 and motor power 42.After scanning stops, if plan again to open when reading, just to diode 20 and motor 40 power supplies.
Be described in detail as follows: when object 48 passed through window 18, light intensity reduced on every side, and in the window projection, this light intensity that photoelectric sensor 60 detects window 18 places changes, and to lasing light emitter and motor power supply, began the work of reading by testing circuit again.
Below referring to Fig. 2:
The scanner of this embodiment is exactly a sales counter plane workstation, and this workstation comprises base of installing on the sales counter and the scanner head of installing on this base certain altitude, and fetch unit is contained in the scanner head, and sensor is installed in the base.As shown in the figure, shadow photoelectric sensor 60 and shadow detector circuit 62 are contained in the base 64, and base 64 is contained on the sales counter plane 66.The top mounting 70 of upright bracket 68 is made the sliding sleeve shape.For example, can be with United States Patent (USP) the 4th, 896, can pack into easily this stand and take out of the body 72 of No. 026 disclosed pistol-shaped scanner head 74 from stand.This United States Patent (USP) at this as the reference data.For hand-held, also can be with scanner head 74 by taking out on the mounting 70.Under this occasion,, pull plate machine 76 whenever reading mark.Also scanner head 74 still can be contained in the body 70, constitute one and be called as the sales counter workstation of " independent flexibly ", the object 78 that makes subsidiary mark is by the workstation on the scanning window 80.During with the slit scan device, shadow rings the opposite that photoelectric sensor 60 is contained in scanning window 80, and object is placed on the window 80, and when making its crosscut by the scanning window, the light intensity on every side that can detect generation as previously mentioned changes.
Referring to Fig. 3:
Sensor pack contains a pair of peak voltage detector, when window is stablized exposure by ambient light, the corresponding a kind of voltage of each peak voltage detector is respectively to each capacitor charging, the light intensity comparison resembles quality testing and surveys state threshold when low around the window place, and then corresponding different voltages discharge each capacitor respectively with different ratios.
Detecting step realizes with a pair of peak voltage detector, when window is stablized exposure by ambient light, the voltage that each peak voltage detector is corresponding different, respectively to each capacitor charging, the light intensity comparison resembles quality testing when knowing that state threshold hang down around the window place, and then corresponding different voltage makes each capacitor discharge respectively with different ratios.
As shown in the figure, shadow photoelectric sensor 60 is connected in parallel on amplifier input terminal.The 2nd peak detctor 86 that signal after the amplification is given the 1st peak detctor 84 and is connected in series with it.Peak detctor 84 and the 2nd peak detctor 86 that is connected in series with it.Peak detctor 84 and 86 has diode D1, D2, resistance R 1, R2 and capacitor C1, C2 respectively.The effect of the 1st peak detctor 84 is to capacitor C1 charging, its charging voltage V1 with incide shadow photoelectric sensor 60 around light intensity proportional.The effect of the 2nd peak detctor 86 is to capacitor C2 charging, its charging voltage V2 also with incide shadow photoelectric sensor 60 around light intensity proportional.Because peak detctor 84 is connected in series with 86, so the 2nd peak detctor can only charge to capacitor C2 with the voltage V2 also lower than voltage V1.This voltage difference is measured with the voltage drop that reduces before and after the semiconductor D1, normally 0.6V.
Resistor network R3, R4 are received in the output of the 1st peak detctor 84, receive the positive input terminal of comparer 88 successively.The negative input end of comparer 88 is directly received in the output of the 2nd peak detctor 86.The output of comparer is received conversioning transistor T1 through resistance R 5, and this transistorized collector is received on the 5V power supply through resistance R 6.The collector of transistor T 1 is connected on the base stage of transistor T 2.The collector of the 2nd transistor T 2 is as output terminal.
As mentioned above, when light incided shadow photoelectric sensor 60 with stable state, V1 was bigger than V2 usually.Comparer 88 detects than voltage difference, is defeated by conversioning transistor T1, T2 output signal.The output of transistor T 2 is received on the power-supply controller of electric of Laser Power Devices 22 or motor power 42, when at all reading less than mark, and when having spent the time of defined, then closes laser diode 20 or motor 40 or closes both simultaneously.In the time of above object passes through scanning window 18 or 80, then illuminance reduces, and detects for shadow photoelectric sensor 60, thereby makes capacitor C1, C2 discharge.The selection of the RC network time constant of peak detctor 84,86 will make capacitor C1 faster than capacitor C2 discharge.Therefore, after the short time, V1 diminishes than V2, and this voltage difference is detected by comparer 88 once more, and it sends the output signal of the transition status that changes transistor T 1, T2 successively.Like this, the output of transistor T 2 makes once more to laser diode 20 or motor 40 or to its both sides' power supply, thereby begins to read the mark of scanning window place object again.
Above-mentioned each formation unit formation capable of being combined and above-mentioned different other types.
The present invention has illustrated the detection architecture that has been assembled into the ambient light substrate in scanner.But the present invention does not plan to be limited to this, is not breaking away under the spirit of the present invention, can carry out all corrections and improvement.
No longer do more analysis, advantage of the present invention has fully been summarized in above explanation, and it is to have used modern knowledge, obtains with reference to prior art.As long as aspect formation, comprise the present invention's overall situation or local technical characterictic, just can find multiple use.Therefore, these use in the interest field also ought to drop on present patent application or in its full scope of equivalents.
Claims (27)
1, a kind of starter gear of scanner is characterized in that, this device comprises following a few part
(a) read the parts of mark with the electrooptics means, the each several part of this mark has different light reflectivities, and light beam is by being exposed to window incident in the ambient light;
(b) in official hour, when reading, stop the parts of the work of reading less than mark;
(c) be installed in the surrounding light sensor at scanning window place, the light intensity that it is used for around the scanning window changes, and restarts mark by its testing result and reads work.
2, the device of putting down in writing according to claim 1 is characterized in that, said fetch unit comprises: by the transmitter of scanning window to the mark emission of lasering beam, receive its catoptrical receiver, this transmitter, receiver and described sensor all are arranged on the same side of scanning window.
3, the device of putting down in writing according to claim 2 is characterized in that: scanner is the slit scan device that is set on the counter top of general planar, and window and counter top are in same plane.
4, the device of putting down in writing according to claim 2 is characterized in that, transmitter includes the optics correction of laser diode, laser beam and the optical module that laser beam is focused on by deciding spot size near the reference plane window.
According to claim 1 or 2 devices of being put down in writing, it is characterized in that 5, fetch unit comprises mark is carried out the sweep unit that comprehensive scan mode scans.
6, the device of putting down in writing according to claim 5 is characterized in that, sweep unit includes and can reach a plurality of catoptrons that are contained near axis around the rotating polygonal body that minute surface is housed of axis.
7, the device of putting down in writing according to claim 4 is characterized in that, said laser diode is installed in the casing that Heat Conduction Material does, the heat that is taken place to leave, casing have one with the sales counter plane at conplane wall, and can dispel the heat towards periphery.
8, the device of putting down in writing according to claim 1 is characterized in that, when carrying out above-mentioned detection, and the parts of the oriented fetch unit power supply of sensor.
9, the device of putting down in writing according to claim 5 is characterized in that, includes the electric lasing light emitter, the sweep unit of electric, and when carrying out described detection, a power supply in lasing light emitter and sweep unit at least.
According to the device of the record of claim 1, it is characterized in that 10, include to the transmitter of mark emission of lasering beam and collect the catoptrical receiver of mark, transmitter and receiver are arranged on window one side, and sensor is arranged on the opposite side of window.
11, the device of putting down in writing according to claim 10, it is characterized in that said scanner is exactly a sales counter plane workstation, this workstation comprises base of installing on the sales counter and the scanner head of installing on this base certain altitude, fetch unit is contained in the scanner head, and sensor is installed in the base.
12, according to the device of the record of claim 11, it is characterized in that said scanner is pistol-shaped, be contained on the base, be convenient to take off.
13, according to the device of the record of claim 1, it is characterized in that, said sensor pack contains a pair of peak voltage detector, when window is stablized exposure by ambient light, the corresponding all voltage of each peak voltage detector is respectively to each capacitor charging, the light intensity comparison resembles quality testing when knowing that state threshold hangs down around the window place, and then corresponding different voltages discharge each capacitor respectively with different ratios.
14, according to the device of the record of claim 1, it is characterized in that, make mark decide the direction crosscut and pass through window by giving.
15, a kind of startup method of scanner is characterized in that, this method comprises the following steps:
(a) make the mark that contains different light reflectivities part by exposing the window in the light around to the open air, and read this mark with the electrooptics method;
(b), and when having reached the time of defined, then stop read step when reading less than mark;
(c) light intensity on every side at scanning window place, and corresponding this detection limit begins read step again.
According to the method for the record of claim 15, it is characterized in that 16, said read step includes by window and sends laser beam to mark, and it is reflected by mark, collects the light signal that this reflects by window again.
According to the method for the record of claim 15, it is characterized in that 17, scanner is the slit scan device that is contained on the sales counter of general planar, and with the same plane of counter top on window is installed.
According to the method for claim 15 record, it is characterized in that 18, said read step is to reach the optical module that focuses on by decided spot size and realize near the reference plane the window with laser diode, optics correction laser beam.
According to the method for claim 15 record, it is characterized in that 19, said read step is with to the comprehensive scan mode scanning light spot of mark.
20, according to the method for claim 15 record, it is characterized in that said scanning step is the polygonal body that minute surface is housed to rotate around axis, and realize with the rotational symmetry orientation a plurality of catoptrons of device near axis.
21, according to the method for claim 15 record, it is characterized in that, can generate heat during owing to laser diode work, diode is contained in the heat-transfer matcrial casing, with the heat of the diode that leaves.
According to the method for claim 15 record, it is characterized in that 22, said read step constitutes the unit with the electrical installation formula and realizes, also comprise and detect in the step and will power to above-mentioned formation unit.
According to the method for claim 15 record, it is characterized in that 23, said read step realizes with electric lasing light emitter and electric scanning element, when detecting, constitutes the power supply of one of unit to these at least.
24, the method for putting down in writing according to claim 16, it is characterized in that, scanner is exactly a sales counter plane workstation, this workstation comprises base that is installed on the sales counter plane and the scanner head of installing on this base certain altitude, read step is to be realized by the unit of installing in the scanner head that constitutes, and is to be realized by the unit of installing in the scanner head that constitutes and detect step.
According to the method for the record of claim 24, it is characterized in that 25, scanner head cartridge and can take off easily on support.
26, the method for putting down in writing according to claim 15, it is characterized in that, said detection step realizes with a pair of peak voltage detector, when window is stablized exposure by ambient light, the voltage that each peak voltage detector is corresponding different, respectively to the charging of each capacitor, when light intensity comparison around the window place resembles quality testing when knowing that state threshold hang down, then corresponding different voltage makes each capacitor discharge respectively with different ratios.
27, according to the method for the record of claim 15, it is characterized in that said read step comprises by deciding direction makes the mark crosscut pass through window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111543 CN1029879C (en) | 1991-12-14 | 1991-12-14 | Starter of scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111543 CN1029879C (en) | 1991-12-14 | 1991-12-14 | Starter of scanner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1073280A true CN1073280A (en) | 1993-06-16 |
| CN1029879C CN1029879C (en) | 1995-09-27 |
Family
ID=4910700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91111543 Expired - Fee Related CN1029879C (en) | 1991-12-14 | 1991-12-14 | Starter of scanner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029879C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765434A (en) * | 2011-08-25 | 2014-04-30 | 讯宝科技公司 | Object detecting system in imaging-based barcode readers |
| CN112183147A (en) * | 2019-07-13 | 2021-01-05 | 迅镭智能（广州）科技有限公司 | Continuous code scanning method and device, scanning equipment and storage medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7059528B2 (en) * | 2004-04-30 | 2006-06-13 | Symbol Technologies, Inc. | Synchronous and resonant drives for producing multiple scan line pattern for electro-optically reading indicia |
-
1991
- 1991-12-14 CN CN 91111543 patent/CN1029879C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765434A (en) * | 2011-08-25 | 2014-04-30 | 讯宝科技公司 | Object detecting system in imaging-based barcode readers |
| CN103765434B (en) * | 2011-08-25 | 2016-09-28 | 讯宝科技公司 | Object detection systems in barcode reader based on imaging |
| CN112183147A (en) * | 2019-07-13 | 2021-01-05 | 迅镭智能（广州）科技有限公司 | Continuous code scanning method and device, scanning equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1029879C (en) | 1995-09-27 |
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