CN106066985A - Laser bar code scanner hardware circuit - Google Patents
Laser bar code scanner hardware circuit Download PDFInfo
- Publication number
- CN106066985A CN106066985A CN201610547952.4A CN201610547952A CN106066985A CN 106066985 A CN106066985 A CN 106066985A CN 201610547952 A CN201610547952 A CN 201610547952A CN 106066985 A CN106066985 A CN 106066985A
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- China
- Prior art keywords
- circuit
- laser
- bar code
- signal
- code scanner
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10831—Arrangement of optical elements, e.g. lenses, mirrors, prisms
Abstract
The invention discloses a kind of laser bar code scanner hardware circuit, it includes photosignal built-up circuit, signal amplification shaping circuit, communicating circuit, decoding control circuit, scan mode switching circuit, sound-producing device, display lamp, infrared ray circuit and motor speed testing circuit.After communicating circuit is connected power taking with outside terminal unit, decoding control circuit controls the mode of laser instrument transmitting laser according to the switching command of scan mode switching circuit, is transmitted on bar code converting laser light into a plurality of or single laser line；Photosignal built-up circuit transfers analog electrical signal to the optical signal of reflection on bar code, signal amplification shaping circuit transfers digital signal to analog electrical signal, digital signal is decoded obtaining bar code information by decoding control circuit, and control sound-producing device, display lamp sends corresponding prompting, bar code information is transmitted to terminal unit by communicating circuit.The present invention can improve recognition efficiency and the speed of laser bar code scanner.
Description
Technical field
The present invention relates to bar code identification technology field, particularly to a kind of laser bar code scanner hardware circuit.
Background technology
At present, laser bar code scanner on the market includes laser instrument, deflecting mirror, swingable reflecting mirror, optical collector, optical filtering
Mirror, photelectric receiver, amplification treatment circuit connect with amplification treatment circuit and the MCU that is controlled laser instrument and power supply mould
Block.The reading method of this laser bar code scanner is: scanning optical signal receives, scanning optical signal analog digital conversion and collection, quickly
Fourier transformation, remove high fdrequency component, Fourier inversion, the big law of use carry out threshold calculations, according to threshold value to bar code
Signal carries out binaryzation and is decoded according to all kinds of bar code standards.This bar code reading method many utilizations software algorithm,
Though decreasing hardware configuration, but this causes bar code recognition the most simultaneously, and speed is slower, it is impossible to quickly decoding, this causes bar
Shape code recognition is inefficient, and recognition speed is slower.
Summary of the invention
The main object of the present invention is to provide a kind of laser bar code scanner hardware circuit, it is intended to improve laser bar code scanning
The recognition efficiency of device and speed.
For achieving the above object, the present invention proposes a kind of laser bar code scanner hardware circuit, this laser bar code scanner
Hardware circuit includes photosignal built-up circuit, signal amplification shaping circuit, communicating circuit, decoding control circuit, scan mode
Switching circuit, sound-producing device, display lamp, infrared ray circuit and motor speed testing circuit；Described photosignal built-up circuit with
Described signal amplification shaping circuit connect, described decoding control circuit respectively with described signal amplification shaping circuit, communicating circuit,
Scan mode switching circuit, sound-producing device, display lamp, infrared ray circuit and motor speed testing circuit connect, and and laser strip
Laser instrument and the motor of code scanning device connect, and described communicating circuit is for the terminal unit externally connected by data wire；
Described decoding control circuit, after described communicating circuit is connected power taking with terminal unit, is cut according to described scan mode
The switching command control laser instrument changing circuit continuously or periodically launches laser, with by the minute surface whirler on described motor
The laser-bounce that laser instrument is sent by structure is sent out to being converted to a plurality of or single laser line after the optical frames group of laser bar code scanner
It is mapped on bar code；
The optical signal reflected on bar code is converted to analog electrical signal by described photosignal built-up circuit, and described signal is put
Described analog electrical signal is amplified and shaping be converted to digital signal by big shaping circuit, the master of described decoding control circuit
Processor described digital signal is decoded obtain bar code information, and control described sound-producing device, display lamp sends accordingly
Prompting, described bar code information that secondary processor is sent by described communicating circuit transmits to terminal unit.
Preferably, described decoding control circuit includes that primary processor, secondary processor, laser control circuit and motor control
Circuit；Described main process respectively with described signal amplification shaping circuit, laser control circuit, circuit for controlling motor, aid in treatment
Device, communicating circuit, scan mode switching circuit, sound-producing device, indicator light circuit, infrared ray circuit and motor speed testing circuit
Connecting, described laser control circuit is connected with described laser instrument, and described circuit for controlling motor is connected with described motor；
The digital signal that described signal amplification shaping circuit exports is decoded obtaining bar code letter by described primary processor
Breath；Described secondary processor by the output of described bar code information to described communicating circuit, with by described communicating circuit by described
Bar code information transmission is to described terminal unit；
Described laser control circuit drives described sharp for the Laser emission control signal exported according to described primary processor
Laser continually or periodically launched by light device；Described circuit for controlling motor is for the motor exported according to described primary processor
Rotate control signal and drive described electric machine rotation, and gather the motor of motor speed testing circuit feedback according to described primary processor
Tach signal regulates the rotating speed of described motor.
Preferably, described scan mode switching circuit includes scan mode switching key；
Described scan mode switching key is under laser bar code scanner multi-thread scanning work state, and switching key is pressed
Time, laser bar code scanner output one-line scanning pattern；Or under laser bar code scanner one-line scanning duty, switching
When button is pressed, laser bar code scanner exports multi-thread scan pattern.
Preferably, described infrared ray circuit includes infrared transmitting circuit and infrared receiving circuit；
Described infrared transmitting circuit is for laser scanning field emission infrared signal, and described infrared receiving circuit is used for
Receive the infrared signal that the object in laser scanning region is reflected, and laser bar code scanner in resting state time
Described decoding control circuit receives this infrared signal and just starts laser bar code scanner entrance normal operating conditions；Or
When not receiving this infrared signal in described Preset Time, decoding control circuit enters dormancy to control laser bar code scanner
State.
Preferably, described motor speed testing circuit includes motor speed sensor；Described motor speed sensor is used for
Detect described motor rotating speed and feed back motor speed signal give described decoding control circuit, and for by sense described minute surface
Minute surface induction marker part set on a wherein minute surface of rotating mechanism detect described in the turned position of a wherein minute surface,
And feed back minute surface induced signal to described decoding control circuit, periodically launch laser controlling described laser instrument.
Technical solution of the present invention is after communicating circuit is connected power taking with outside terminal unit, and decoding control circuit is according to sweeping
The switching command control laser instrument retouching mode switching circuit continuously or periodically launches laser, with the laser sent by laser instrument
Be converted to a plurality of or single laser line be transmitted on bar code；The optical signal reflected on bar code is turned by photosignal built-up circuit
For analog electrical signal, signal amplification shaping circuit amplifies shaping analog electrical signal and transfers digital signal to, decoding control circuit
Primary processor is decoded obtaining bar code information digital signal, and control sound-producing device, display lamp is pointed out accordingly, logical
The bar code information that secondary processor is sent by news circuit transmits to terminal unit.The present invention is by photosignal built-up circuit, letter
Number amplification and rectification circuit, communicating circuit, decoding control circuit, scan mode switching circuit, sound-producing device, display lamp, infrared ray
Circuit and motor speed testing circuit composition laser bar code scanner hardware circuit, drive relevant device to realize by hardware circuit
Recognition to bar code, thus relative to the scheme of existing laser bar code scanner recognition bar code, the present invention has raising and swashs
The recognition efficiency of optical bar code scanning device and the beneficial effect of speed.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the functional block diagram of laser bar code scanner hardware circuit one embodiment of the present invention；
Fig. 2 is the functional block diagram of laser bar code scanner hardware circuit one specific embodiment shown in Fig. 1.
Drawing reference numeral illustrates:
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further referring to the drawings.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under not making creative work premise all its
His embodiment, broadly falls into the scope of protection of the invention.
It is to be appreciated that directional instruction in the embodiment of the present invention (such as up, down, left, right, before and after ...) is only used
In explaining relative position relation between each parts, motion conditions etc. under a certain particular pose, if this particular pose occurs
During change, then directionality instruction changes the most therewith.
It addition, the description relating to " first ", " second " etc. in the present invention is only used for describing purpose, and it is not intended that refer to
Show or imply its relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", "
Two " feature can express or implicitly include at least one this feature.It addition, the technical scheme between each embodiment can
To be combined with each other, but must be based on those of ordinary skill in the art are capable of, when the combination of technical scheme occurs
Conflicting will be understood that the combination of this technical scheme does not exists, the most not at the protection model of application claims when maybe cannot realize
Within enclosing.
The present invention proposes a kind of laser bar code scanner hardware circuit, and this laser bar code scanner hardware circuit is laser strip
The hardware circuit part of code scanning device, laser bar code scanner also includes that laser instrument, motor and motor are fixing and is connected and has many
The minute surface rotating mechanism of individual minute surface, and for laser rays being reflexed to the optical frames group on bar code.
With reference to Fig. 1, in one embodiment of the invention, laser bar code scanner hardware circuit 10 of the present invention includes that photosignal turns
Connection circuit 11, signal amplification shaping circuit 12, communicating circuit 13, decoding control circuit 14, scan mode switching circuit 15, sounding
Device 16, display lamp 17, infrared ray circuit 18 and motor speed testing circuit 19；Sound-producing device 16 is preferably loudspeaker, display lamp
17 are preferably LED.Described photosignal built-up circuit 11 is connected with described signal amplification shaping circuit 12, and described decoding controls
Circuit 14 respectively with described signal amplification shaping circuit 12, communicating circuit 13, scan mode switching circuit 15, sound-producing device 16,
Display lamp 17, infrared ray circuit 18 and motor speed testing circuit 19 connect, and with the laser instrument 20 of laser bar code scanner and
Motor 30 connects, and described communicating circuit 13 is for the terminal unit 70 externally connected by data wire, concrete communicating circuit 13
The USB interface of terminal unit 70, serial interface or PS2 interface can be connected to by data wire.
Described decoding control circuit 14 is after described communicating circuit 13 is connected power taking with terminal unit 70, according to described scanning
The switching command of mode switching circuit 15 controls laser instrument 20 and continuously or periodically launches laser, with by described motor 30
Minute surface rotating mechanism 40 laser-bounce that laser instrument 20 is sent be converted to after the optical frames group 50 of laser bar code scanner
A plurality of or single laser line is transmitted on bar code 60.
The optical signal of reflection on bar code 60 is converted to analog electrical signal, described letter by described photosignal built-up circuit 11
Described analog electrical signal is amplified and shaping be converted to digital signal by number amplification and rectification circuit 12, and described decoding controls electricity
The primary processor 142 on road is decoded obtaining bar code information to described digital signal, and controls described sound-producing device 16, instruction
Lamp 17 sends corresponding prompting, and the described bar code information transmission that secondary processor is sent by described communicating circuit 13 sets to terminal
Standby 70.
In the present embodiment, communicating circuit 13 passes through the terminal unit 70 (such as computer) that data wire is externally connected, communication
Be energized after being connected with terminal unit 70 work output services voltage of circuit 13 is powered to whole laser bar code scanner, leads to simultaneously
News circuit 13 sets up network connection relation with terminal unit 70, it is possible to terminal unit 70 communication, it is achieved laser bar code scanner
And carry out communication between terminal unit 70.
After described communicating circuit 13 is connected power taking with terminal unit 70, laser bar code scanner energising work, decoding control
The primary processor 142 of circuit processed exports multi-thread scanning letter when the scanning switching command detected is the instruction of many line laser structured light
Number, one-line scanning signal is exported when the scanning switching command detected is single line laser scan instruction.And, motor speed is examined
Slowdown monitoring circuit 19 detects a wherein minute surface of the minute surface rotating mechanism 40 on motor 30, owing to minute surface rotating mechanism 40 is at motor 30
Driving lower rotation, therefore this minute surface rotates and often rotates a circle, and motor speed testing circuit 19 detects this minute surface once, and motor turns
When speed testing circuit 19 detects this minute surface, feedback minute surface induced signal is to decoding control circuit 14.
Decoding control circuit 14 is Output of laser when receiving the multi-thread scanning signal of scan mode switching circuit 15 output
Emissioning controling signal controls described laser instrument 20 and launches laser to minute surface rotating mechanism 40.Or, decoding control circuit 14 exists
When receiving the one-line scanning signal of scan mode switching circuit 15 output, the minute surface of detection motor speed testing circuit 19 feedback
Induced signal, when detecting that motor speed testing circuit 19 feeds back minute surface induced signal, decoding control circuit 14 Output of laser
Emissioning controling signal controls described laser instrument 20 and launches laser to minute surface rotating mechanism 40；When being not detected by motor speed detection
When circuit 19 feeds back minute surface induced signal, decoding control circuit 14 Output of laser closing control signal controls described laser instrument 20 and closes
Close, suspend and launch laser, i.e. in the case of scan mode switching circuit 15 exports one-line scanning signal, when motor speed detects
When circuit 19 feeds back minute surface induced signal to decoding control circuit 14, laser instrument 20 just launches laser to motor speed testing circuit
On a wherein minute surface of the minute surface rotating mechanism 40 that 19 are detected.Thus, under multi-thread laser scanning methods, laser instrument 20 is continuous
Laser is launched to minute surface rotating mechanism 40 in ground；Under single line laser scan mode, laser instrument 20 is periodically launched laser and is arrived
On minute surface rotating mechanism 40.
Under multi-thread laser scanning methods, laser instrument 20 is continually transmitted laser to minute surface rotating mechanism 40, due to mirror
Face rotating mechanism 40 is the optical prism of multiaspect, and the laser that laser instrument 20 is all sent by each face reflects, therefore, and now mirror
The laser-bounce that laser instrument 20 is sent by face rotating mechanism 40 is transmitted into bar shaped to being converted to multi-stripe laser line after optical frames group 50
On code 60, be the most now transmitted on bar code 60 is for a plurality of laser rays in net distribution.Thus, when bar code 60 is put
When putting in the laser rays region of this net distribution, just there is laser rays can be irradiated on bar code 60.Concrete, these
Laser line scanning is divided into five directions to launch, and angle is 72 °, and there are 4 parallel laser rays in each direction.
Under single line laser scan mode, control electricity when motor speed testing circuit 19 feeds back minute surface induced signal to decoding
During road 14, a wherein mirror of the minute surface rotating mechanism 40 that laser is detected just launched to motor speed testing circuit 19 by laser instrument 20
On face, laser is reflected by only this minute surface, thus the laser rays that now minute surface rotating mechanism 40 is launched is single laser
Line.
According to the reflection law of light, when there being laser rays to be irradiated on bar code 60, laser rays is entered by bar code 60
Row reflection.In laser bar code scanner hardware circuit 10 course of normal operation, photosignal built-up circuit 11 for detection is
No have bar code to reflect laser rays, i.e. detects whether to receive optical signal.Photosignal built-up circuit 11 is detecting optical signal
Time, this optical signal being converted to analog electrical signal, and this analog electrical signal is exported to signal amplification shaping circuit 12, signal is put
This analog electrical signal is amplified and after Shape correction, this analog electrical signal is converted to digital signal by big shaping circuit 12, and
This digital signal is exported to decoding control circuit 14.Described digital signal is entered by the primary processor 142 of decoding control circuit 14
Row decoding obtains bar code information, and the primary processor 142 of decoding control circuit 14 is obtaining bar code information, i.e. during successfully decoded
Output auditory tone cues controls signal to sound-producing device 16, and output light prompt controls signal to display lamp 17, with by sending out
Scan decoder is successfully pointed out by acoustic device 16 and display lamp 17 by sound and light；Meanwhile, decoding control circuit 14
This bar code information is sent to secondary processor 141 by primary processor 142, and secondary processor 141 is sent to communicating circuit 13.Logical
News circuit 13 is by described bar code information transmission to described terminal unit 70, thus distinguishes letter representative on bar code 60
Breath.
Above-mentioned bar code information refers to the set of number signal corresponding with black and white bar color in bar code 60 or black and white bar
Width.
Relative to prior art, the present invention is by photosignal built-up circuit 11, signal amplification shaping circuit 12, communicating circuit
13, decoding control circuit 14, scan mode switching circuit 15, sound-producing device 16, display lamp 17, infrared ray circuit 18 and motor turn
Speed testing circuit 19 forms laser bar code scanner hardware circuit 10, controls each parts of laser bar code scanner by hardware circuit
Realize bar code 60 is scanned recognition, thus relative to the scheme of existing laser bar code scanner recognition bar code, improve
The recognition efficiency of laser bar code scanner and speed.
Referring again to Fig. 2, in laser bar code scanner hardware circuit 10 of the present invention, described decoding control circuit 14 includes auxiliary
Processor 141, processor circuit 142, laser control circuit 143 and circuit for controlling motor 144；Described primary processor 142 is respectively
With described laser control circuit 143, circuit for controlling motor 144, communicating circuit 13, scan mode switching circuit 15, sound-producing device
16, display lamp 17, infrared ray circuit 18 and motor speed testing circuit 19 connect, and described laser control circuit 143 swashs with described
Light device 20 connects, and described circuit for controlling motor 144 is connected with described motor 30.
The digital signal that described signal amplification shaping circuit 12 exports is decoded obtaining bar shaped by described primary processor 142
Code information；Described secondary processor 141 is by described bar code information output to described communicating circuit 13, with by described communication electricity
Road 13 is by described bar code information transmission extremely described terminal unit 70.
Described laser control circuit 143 is for driving according to the Laser emission control signal of described primary processor 142 output
Laser continually or periodically launched by described laser instrument 20；Described circuit for controlling motor 144 is for according to described main process
The electric machine rotation control signal of device 142 output drives described motor 30 to rotate, and gathers motor according to described primary processor 142 and turn
The motor speed signal of speed testing circuit 19 feedback regulates the rotating speed of described motor 30.
Specifically, as in figure 2 it is shown, described scan mode switching circuit 15 includes scan mode switching key 151；Described sweep
Retouching mode switching key 151 and decoding control circuit 14 connects, the main primary processor 142 specifically and in decoding control circuit 14 is even
Connect.
Described scan mode switching key 151 is pressed and under laser bar code scanner is multi-thread scanning work state,
Key command is one-line scanning instruction output extremely described decoding control circuit 14, or is one-line scanning at laser bar code scanner
Under duty, detect that described scan mode switching key 151 is pressed and key command is that multi-thread scan instruction exports extremely
Described decoding control circuit 14.
Specifically, as in figure 2 it is shown, described infrared ray circuit 18 includes infrared transmitting circuit 181 and infrared receiving circuit
182；Infrared transmitting circuit 181 and infrared receiving circuit 182 are all connected with decoding control circuit 14, concrete all electric with decoding control
Primary processor in road 14 connects.
Described infrared transmitting circuit 181 is for laser scanning field emission infrared signal, described infrared receiving circuit
182 for receiving the infrared signal that the bar code 60 in laser scanning region is reflected, and is receiving this infrared ray
Enabling signal extremely described decoding control circuit 14 is exported, to control laser bar code scanner entrance normal operating conditions during signal；
Or when not receiving this infrared signal in described Preset Time (such as 30s) export sleep signal to as described in decoding control electricity
Road 14, to control laser bar code scanner entrance resting state.
Specifically, as in figure 2 it is shown, described motor speed testing circuit 19 includes motor speed sensor 191；Motor speed
Sensor 191 is connected with decoding control circuit 14, is specifically connected with the primary processor in decoding control circuit 14.Described motor turns
Speed sensor 191 for detecting the rotating speed of described motor 30 and feeding back motor speed signal to described decoding control circuit 14, and
For detecting this by minute surface induction marker part set on a wherein minute surface of the described minute surface rotating mechanism 40 of sensing
The wherein turned position of a minute surface, and feed back minute surface induced signal extremely described decoding control circuit 14, to control described laser instrument
20 periodically launch laser.
Referring to Fig. 2, the operation principle of laser bar code scanner hardware circuit 10 of the present invention is described in detail below:
When by data wire by terminal unit 70 that laser bar code scanner is externally connected, laser bar code scanner is hard
In part circuit 10, communicating circuit 13 is connected with terminal unit 70, and communicating circuit 13 is energized after being connected with terminal unit 70 work defeated
Going out running voltage to power to whole laser bar code scanner, simultaneous communications circuit 13 is set up network with terminal unit 70 and is connected pass
System, it is possible to terminal unit 70 communication, it is achieved carry out communication between laser bar code scanner and terminal unit 70.
After laser bar code scanner obtains electric work, the infrared transmitting circuit 181 in infrared ray circuit 18 is to laser scanning district
Infrared signal is launched in territory, and after infrared transmitting circuit 181 launches infrared signal, infrared ray is believed by infrared receiving circuit 182
Number detect, to have detected whether that bar code is placed in laser scanning region.
When there being object to be scanned in laser scanning region, the infrared signal that infrared transmitting circuit 181 is launched is at thing
Body reflects, and now infrared receiving circuit 182 receives the infrared signal of object reflection, and infrared receiving circuit 182 receives
The infrared signal come to reflection is receiving the letter of infrared receiving circuit 182 output to primary processor 142, primary processor 142
Number time confirm to exist in laser scanning region the object of scanning, control laser bar code scanner entrance normal operating conditions.On the contrary,
When there is no object to be scanned in laser scanning region, after the infrared signal that infrared transmitting circuit 181 is launched, infrared connect
Receive circuit 182 and will not receive the infrared signal that reflection comes, now primary processor 142 not detection in the set time is set
During to infrared receiving circuit 182 output signal, main processor circuit 142 confirms in laser scanning region without bar shaped to be scanned
Code, controls laser bar code scanner and enters resting state.After laser bar code scanner enters resting state, when infrared receiver electricity
Road 182, by when receiving the infrared signal reflected, outputs signal to primary processor 142, to wake up laser bar code scanner up
It is switched to normal operating conditions.Thus detect whether bar code to be scanned by infrared ray circuit 18, carry out switched laser bar
Code scanning device normally works or enters resting state, it is possible to save the energy, it is also possible to avoid laser bar code scanner maloperation.
Under laser bar code scanner is in normal operating conditions, primary processor 142 rotates control signal at output motor
To circuit for controlling motor 144, circuit for controlling motor 144 drives signal to motor according to this electric machine rotation control signal output motor
30 to drive this motor 30 to rotate, and drives minute surface rotating mechanism 40 to rotate when motor 30 rotates.Minute surface is driven to rotate at motor 30
After mechanism 40 rotates, the sense on motor speed sensor 191 induction mirror rotating mechanism 40 in motor speed testing circuit 19
Answer identification device, by sensing the rotating speed of this induction marker part detection motor 30 and true when sensing induction marker part
Determine the turned position of the minute surface at induction marker part place, thus feed back minute surface induced signal to primary processor 142.Motor controls
The rotating speed of self-regulation motor 30 is to suitable rotational speed in motor 30 rotation process for circuit 144, and specifically the rotating speed at motor 30 surpasses
When crossing preset rotation speed scope, the i.e. minima less than preset rotation speed scope or the maximum higher than preset rotation speed scope, regulation electricity
The rotating speed of machine 30 is to preset rotation speed scope.This preset rotation speed scope can be configured according to actual needs, is not restricted.
Meanwhile, under laser bar code scanner is in normal operating conditions, primary processor 142 detects scan mode switching and presses
The state of key 151.
When under multi-thread scan pattern state, primary processor 142 detects that scan mode switching key 151 is pressed instruction
Time, primary processor 142 is Output of laser emission control letter when receiving the minute surface induced signal of motor speed sensor 191 feedback
Number to laser control circuit 143, control described laser instrument 20 by laser control circuit 143 and launch laser to minute surface rotating mechanism
On 40；When not receiving the minute surface induced signal of motor speed sensor 191 feedback, Output of laser closing control signal is to swashing
Light control circuit 143, controls described laser instrument 20 and closes.Thus, now laser instrument 20 is periodically to launch laser to minute surface
On a wherein minute surface of rotating mechanism 40, the laser that now laser instrument 20 sends through minute surface rotating mechanism 40 by 20, laser instrument
The laser-bounce gone out is transmitted on bar code 60 to being converted to a laser rays after optical frames group 50, now laser bar code scanner
It is under one-line scanning mode and bar code 60 is scanned recognition.
When, under one-line scanning mode state, detecting when scan mode switching key 151 is pressed.Primary processor 142
Output is continually transmitted laser control signal to laser control circuit 143, controls described laser instrument by laser control circuit 143
20 are continually transmitted laser to minute surface rotating mechanism 40.Owing to each minute surface of minute surface rotating mechanism 40 is all to 20, laser instrument
The laser penetrated reflects, thus the laser that laser instrument 20 is sent by the laser that sends of laser instrument 20 through minute surface rotating mechanism 40
Being converted to multi-stripe laser line after reflexing to optical frames group 50 be transmitted on bar code 60, now laser bar code scanner is in multi-thread
Under scan mode, bar code 60 is scanned recognition.
After the laser of minute surface rotating mechanism 40 reflection is irradiated on bar code 60, photosignal built-up circuit 11 receives
The laser rays come to bar code 60 reflection, i.e. optical signal, and export after this optical signal is converted to analog electrical signal to signal and put
Big shaping circuit 12, this analog electrical signal is carried out this simulation after multistage amplification and Shape correction by signal amplification shaping circuit 12
The signal of telecommunication is converted to digital signal, and exports this digital signal to primary processor 142.Primary processor 142 is to described numeral letter
Number it is decoded obtaining bar code information, and this bar code information is exported to secondary processor 141.Secondary processor 141 is again
This bar code information is sent to communicating circuit 13.Communicating circuit 13 is by the terminal unit of described bar code information transmission to outside
70, thus distinguish information representative on bar code 60.
In laser bar code scanner work process, display lamp 17 can send the light of different colours to represent different work shape
State.Such as, send the light representations laser bar code scanner of different colours by LED etc. and be in normal operating conditions, laser bar code
The success of scanning device scan decoder, laser bar code scanner are in the state of setting etc..It addition, when primary processor 142 judges bar code
When information decoding is complete, i.e. when laser bar code scanner carries out bar code scanning success, sound-producing device 16 sends sound, thus
The bar code that prompting user is scanned has scanned successfully.Carry out acousto-optic hint by sound-producing device 16 and display lamp 17, be conducive to
In the case of environment is more noisy, user is pointed out, it is to avoid scanning leakage bar code or scan stripes shape code phenomenon is repeated several times sends out
Raw.
The foregoing is only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every at this
Under the inventive concept of invention, utilize the equivalent structure transformation that description of the invention and accompanying drawing content are made, or directly/indirectly use
The technical field relevant at other is included in the scope of patent protection of the present invention.
Claims (5)
1. a laser bar code scanner hardware circuit, it is characterised in that include that photosignal built-up circuit, signal amplify shaping
Circuit, communicating circuit, decoding control circuit, scan mode switching circuit, sound-producing device, display lamp, infrared ray circuit and motor
Rotating speed measring circuit；Described photosignal built-up circuit is connected with described signal amplification shaping circuit, described decoding control circuit
Respectively with described signal amplification shaping circuit, communicating circuit, scan mode switching circuit, sound-producing device, display lamp, infrared ray electric
Road and motor speed testing circuit connect, and are connected with laser instrument and the motor of laser bar code scanner, and described communicating circuit is used
In the terminal unit externally connected by data wire；
Described decoding control circuit is after described communicating circuit is connected power taking with terminal unit, according to described scan mode switching electricity
The switching command on road controls laser instrument and continuously or periodically launches laser, to be incited somebody to action by the minute surface rotating mechanism on described motor
The laser-bounce that laser instrument sends is transmitted into being converted to a plurality of or single laser line after the optical frames group of laser bar code scanner
On bar code；
The optical signal reflected on bar code is converted to analog electrical signal by described photosignal built-up circuit, and described signal amplifies whole
Described analog electrical signal is amplified and shaping be converted to digital signal by shape circuit, and described decoding control circuit is to described number
Word signal is decoded obtaining bar code information, and control described sound-producing device, display lamp sends corresponding prompting, described communication
Described bar code information is transmitted to terminal unit by circuit.
2. laser bar code scanner hardware circuit as claimed in claim 1, it is characterised in that described decoding control circuit bag
Include, primary processor, secondary processor, laser control circuit and circuit for controlling motor；Described primary processor respectively with described signal
Amplification and rectification circuit, laser control circuit, circuit for controlling motor, secondary processor, communicating circuit, scan mode switching circuit,
Sound-producing device, indicator light circuit, infrared ray circuit and motor speed testing circuit connect, and described laser control circuit swashs with described
Light device connects, and described circuit for controlling motor is connected with described motor；
The digital signal that described signal amplification shaping circuit exports is decoded obtaining by the primary processor of described decoding control circuit
Take bar code information；Described secondary processor is by described bar code information output extremely described communicating circuit, with by described communication
Circuit is by described bar code information transmission extremely described terminal unit；
Described laser control circuit drives described laser instrument for the Laser emission control signal exported according to described primary processor
Continually or periodically launch laser；Described circuit for controlling motor is for the electric machine rotation exported according to described primary processor
Control signal drives described electric machine rotation, and gathers the motor speed of motor speed testing circuit feedback according to described primary processor
The rotating speed of motor described in Signal Regulation.
3. laser bar code scanner hardware circuit as claimed in claim 1, it is characterised in that described scan mode switching circuit
Including scan mode switching key；
Described scan mode switching key is time under laser bar code scanner is multi-thread scanning work state, switching key is pressed,
Laser bar code scanner output one-line scanning pattern；Switching key quilt under laser bar code scanner is one-line scanning duty
When pressing, laser bar code scanner exports multi-thread scan pattern.
4. laser bar code scanner hardware circuit as claimed in claim 1, it is characterised in that described infrared ray circuit includes red
Emission circuit and infrared receiving circuit；
Described infrared transmitting circuit is for laser scanning field emission infrared signal, and described infrared receiving circuit is used for receiving
The infrared signal that object in laser scanning region is reflected, and described in when laser bar code scanner is in resting state
Decoding control circuit receives this infrared signal and just starts laser bar code scanner entrance normal operating conditions；Or described
Do not receive described decoding control circuit during this infrared signal in Preset Time and enter dormancy to control laser bar code scanner
State.
5. the laser bar code scanner hardware circuit as described in any one in Claims 1-4, it is characterised in that described electricity
Machine Rotating speed measring circuit includes motor speed sensor；Described motor speed sensor is the most anti-for the rotating speed detecting described motor
Generating aid tach signal gives described decoding control circuit, and for the wherein minute surface by sensing described minute surface rotating mechanism
Set minute surface induction marker part detect described in the turned position of a wherein minute surface, and feed back minute surface induced signal to institute
State decoding control circuit, periodically launch laser controlling described laser instrument.
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| CN201610547952.4A CN106066985A (en) | 2016-07-11 | 2016-07-11 | Laser bar code scanner hardware circuit |
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| CN201610547952.4A CN106066985A (en) | 2016-07-11 | 2016-07-11 | Laser bar code scanner hardware circuit |
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