CN107452179A - A kind of Intelligent acousto-optic prompting mark system and its application process - Google Patents
A kind of Intelligent acousto-optic prompting mark system and its application process Download PDFInfo
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- CN107452179A CN107452179A CN201710823736.2A CN201710823736A CN107452179A CN 107452179 A CN107452179 A CN 107452179A CN 201710823736 A CN201710823736 A CN 201710823736A CN 107452179 A CN107452179 A CN 107452179A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000008569 process Effects 0.000 title abstract description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052744 lithium Inorganic materials 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 239000003550 marker Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 230000009897 systematic effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- 230000008439 repair process Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B19/00—Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
Abstract
The present invention relates to the technical field of power equipment indicating alarm device, more specifically, be related to one kind can only acousto-optic hint mark system and its application process, including power circuit and the central control module, light level module, Distance-sensing module, temperature sensing module, rainfall sensing module, light-operated loop, lighting circuit and the sound loop that are connected with power circuit.The present invention is only light at night by central control module and light level module co- controlling lighting circuit, more effectively remind while power saving shift member job site, around powered position reduce the probability that the class of working at night member goes to the wrong way interval by mistake；Pass through the setting of single-chip microcomputer and Distance-sensing module, temperature sensing module and rainfall sensing module, when detecting that distance, temperature and rainfall exceed trigger condition set in advance, central control module control sound loop sends voice signal and reminds staff's high temperature and work risk caused by heavy rain；And simple system, it is applied widely.
Description
Technical field
, can only acousto-optic more particularly, to one kind the present invention relates to the technical field of power equipment indicating alarm device
Prompt mark system and its application process.
Background technology
Electric power enterprise master, distribution license work before be required for according to work requirements require position suspension Sign Board be used for carry
Awake shift member job site, powered position provide warning.Existing Sign Board uses feasible but large-scale when running on daytime
When operation or night rush to repair, traditional foamed plastics Sign Board there is situation about can not see clearly at night, although in job site
It is listed but does not have the effect of mark, the safety progress of power generation work can not be ensured.
At present, more and more operation or repairing place use the identity device of electron type, when identity device is detected with
People sends audible alarm or flashing light alarm when entering operation place or repairing place.However, this identity device usually needs to connect
Entering power supply could work, and limit the application of identity device；Enter operatively in addition, this identity device can only work as someone
Audible alarm or flashing light alarm are just sent when point or repairing place, certain check frequency and potential risk be present.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of Intelligent acousto-optic prompting mark system and its answer
With method, can not only noctilucence remind night operator job site, around powered position, the reduction class of working at night into
Member goes to the wrong way the probability at interval by mistake；And it can effectively remind work risk caused by high temperature, heavy rain.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
There is provided a kind of Intelligent acousto-optic prompting mark system, including power circuit and the center that be connected with power circuit control mould
Block, light level module, Distance-sensing module, temperature sensing module and rainfall sensing module, the light level module, distance
Sensing module, temperature sensing module and rainfall sensing module are connected to the input of the central control module, the center control
The output end of molding block is connected with light-operated loop, the lighting circuit for luminous lighting prompting and the sound for voice message and returned
Road, the lighting circuit are connected with light-operated circuit communication.
The Intelligent acousto-optic prompting mark system of the present invention, passes through light level module, Distance-sensing module, TEMP mould
Block and rainfall sensing module collection ambient data are simultaneously transmitted to central control module Treatment Analysis；When the light detected,
When distance, temperature and rainfall exceed trigger condition set in advance, central control module control lighting circuit and sound loop hair
Go out light or voice signal prompting staff, it is effective to remind shift member job site, the powered position of surrounding to reduce night
Between shift member go to the wrong way work risk caused by the probability and high temperature and heavy rain at interval by mistake.
Further, the lighting circuit includes some groups of light emitting diodes being connected in parallel；Some light-emitting diodes
Pipe forms circle part and sign, and the sign printed words are inside the circle part.Light emitting diode has luminous strong
The characteristics of spending high power saving easy care, lighting circuit is controlled by central control module and not worked on daytime, only light at night, is saved
Effectively remind shift member job site, the powered position of surrounding to reduce the class of working at night member while electric and go to the wrong way interval by mistake
Probability.
Further, the light emitting diode is the high brightness red LED lamp by light-operated circuit controls.Red is used for early warning
The effect of prompting is good, can more cause the attention of operating personnel.
Further, the light-operated circuit includes photo resistance R46, LM393 twin voltage comparator and NCE3010S fields
Effect pipe, the photo resistance R46 and LM393 twin voltage comparators are connected in parallel, and the LM393 twin voltages comparator is connected to
The input of NCE3010S FETs.Evening LM393 twin voltage comparator output high level, output on daytime low level, and light
Quick resistance R46 evening resistance is small, daytime resistance it is big, it is only light at night so as to control lighting circuit not worked on daytime, save
Electricity saves the energy.
Further, the sound loop includes binding post P1, SC5020B speech chip, MD8002A audio powers are put
Big device, LS1 loudspeakers and electric capacity C1, C2, the binding post P1 are connected with the pin PA0/KEY of SC5020B speech chips,
The electric capacity C1 is series at the pin PWM1/DAC of SC5020B speech chips and the pin IN- of MD8002A audio-frequency power amplifiers
Between, the electric capacity C2 is series between the pin IN+ of MD8002A audio-frequency power amplifiers and pin GND, the LS1 loudspeakers
It is connected in series between pin VO+, the pin VO- of the MD8002A audio-frequency power amplifiers.Burning in SC5020B speech chips
Have and " pay attention to：Work herein " " pay attention to：The caveat such as No switching on ", when the ambient signal detected reaches trigger condition, in
The control module control corresponding caveat of control voice chip repeatedly broadcasting is entreated, via MD8002A audio-frequency power amplifier power
Transmit after amplification to LS1 loudspeakers, and exported by LS1 loudspeakers.
Further, the power circuit include binding post P2, LM7805 three terminal regulator and electric capacity C3, C4, C5,
C6, described electric capacity C3, C4 are parallel to the input IN of the LM7805 three terminal regulators, earth terminal GND both ends, the electric capacity
C5, C6 are parallel to the output end OUT of the LM7805 three terminal regulators, earth terminal GND both ends, the binding post P2 and electricity
It is in parallel to hold C3.Binding post P2 is connected with 12V working powers, and 12V supply voltages are in electric capacity and the work of LM7805 three terminal regulators
The supply voltage for being 5V with lower output.
Further, the Intelligent acousto-optic prompting mark system also includes the chargeable built-in lithium cell moulds of 12V/500mAH
Block, the lithium battery module are provided with charging inlet, solar panel are electrically connected with the charging inlet.Using solar energy
Cell panel charges for battery, without external power supply, is easy to carry about with one, the scope of application is more extensive.
Further, the output end of the central control module is also associated with being used to show that light level module, distance pass
Feel module, temperature sensing module, light intensity, distance, temperature, the display module of rainfall of the monitoring of rainfall sensing module.Display
The ambient parameter real-time display such as light intensity, distance, temperature, rainfall is easy to staff's Real Time Observation surrounding environment by module
Parameter.
Further, the central control module is the triggering bar for adding light intensity, distance, temperature, rainfall signal
The STC89C52 single chip of part, compact, easy to carry of the STC89C52 single chip as central control module.
Present invention also offers a kind of Intelligent acousto-optic to prompt mark systematic difference method, and methods described includes following step
Suddenly：
S1. lighting circuit and the trigger condition in sound loop are installed additional in STC89C52 single chip：Light intensity threshold value, distance
Threshold value, temperature threshold, rainfall threshold value；
S2. after step S1, the burning " attention in SC5020B speech chips：Work herein ", " pay attention to：The languages such as No switching on "
Sound prompt message；
S3. after step S2, when the light intensity that light level module detects is less than light intensity threshold value, center control
Module controls lighting circuit normal work, and central control module control high brightness red LED lamp lights；When light level module is examined
When the light intensity measured is higher than light intensity threshold value, central control module control high brightness red LED lamp is extinguished；
S4. after step S2, when Distance-sensing module has detected that mobile object distance marker board is less than distance threshold, in
Entreat control module control sound loop to play " to pay attention to：Working herein " voice messaging to be to remind shift member；
S5. after step S2, when temperature sensing module detects that current work premise temperature is higher than design temperature threshold value, in
Centre control module control sound loop plays " attention high temperature " voice messaging to remind working member to pay attention to working caused by high temperature
Risk；
S6. after step S2, when rainfall sensing module detects current work premise temperature higher than setting rainfall threshold value, in
Centre control module control sound loop plays " attention heavy rain " voice messaging to remind working member to pay attention to working caused by heavy rain
Risk.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention Intelligent acousto-optic prompting mark system, including power circuit and be connected with power circuit center control mould
Block, light level module, Distance-sensing module, temperature sensing module and rainfall sensing module, in addition to central control module with
And it is connected to light-operated loop, lighting circuit and the sound loop of central control module output end.The Intelligent acousto-optic mark of the present invention
System, ambient data is gathered by light level module, Distance-sensing module, temperature sensing module and rainfall sensing module
And transmit to central control module Treatment Analysis；When light, distance, temperature and the rainfall detected exceedes triggering set in advance
During condition, central control module control lighting circuit and sound loop send light or voice signal prompting staff, effectively
Prompting shift member job site, around powered position reduce probability and height that the class of working at night member goes to the wrong way interval by mistake
Temperature and work risk caused by heavy rain；And simple system, it is applied widely.
Brief description of the drawings
Fig. 1 is that the Intelligent acousto-optic of the present invention prompts the system construction drawing of mark system.
Fig. 2 is the structural representation for the lighting circuit that Intelligent acousto-optic prompts mark system.
Fig. 3 is the circuit diagram in the light-operated loop that Intelligent acousto-optic prompts mark system.
Fig. 4 is the circuit diagram in the sound loop that Intelligent acousto-optic prompts mark system.
Fig. 5 is the circuit diagram for the power circuit that Intelligent acousto-optic prompts mark system.
Embodiment
With reference to embodiment, the present invention is further illustrated.Wherein, being given for example only property of accompanying drawing illustrates,
What is represented is only schematic diagram, rather than pictorial diagram, it is impossible to is interpreted as the limitation to this patent；In order to which the reality of the present invention is better described
Example is applied, some parts of accompanying drawing have omission, zoomed in or out, and do not represent the size of actual product；To those skilled in the art
For, some known features and its explanation may be omitted and will be understood by accompanying drawing.
Same or analogous label corresponds to same or analogous part in the accompanying drawing of the embodiment of the present invention；In retouching for the present invention
In stating, it is to be understood that if it is based on accompanying drawing to have the orientation of the instructions such as term " on ", " under ", "left", "right" or position relationship
Shown orientation or position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply meaning
Device or element must have specific orientation, with specific azimuth configuration and operation, therefore position relationship described in accompanying drawing
Term being given for example only property explanation, it is impossible to the limitation to this patent is interpreted as, for the ordinary skill in the art, can
To understand the concrete meaning of above-mentioned term as the case may be.
Embodiment 1
As shown in Figures 1 to 5 for the present invention Intelligent acousto-optic prompt mark system first embodiment, including power circuit and
Central control module, light level module, Distance-sensing module, temperature sensing module and the rainfall sensing being connected with power circuit
Module, light level module, Distance-sensing module, temperature sensing module and rainfall sensing module are connected to the center control mould
The input of block, the output end of central control module are connected with light-operated loop, lighting circuit and use for luminous lighting prompting
In the sound loop of voice message, lighting circuit is connected with light-operated circuit communication；Intelligent acousto-optic prompting mark system also includes
The chargeable built-in lithium cell modules of 12V/500mAH, lithium battery module are provided with charging inlet, are electrically connected with charging inlet
Solar panel, use solar panel to be charged for battery, without external power supply, be easy to carry about with one, the scope of application is more
Extensively；The output end of central control module is also associated with being used to show light level module, Distance-sensing module, TEMP mould
Block, light intensity, distance, temperature, the display module of rainfall of the monitoring of rainfall sensing module, are easy to staff's Real Time Observation all
Enclose ambient parameter.In the present embodiment, central control module is the triggering bar for adding light intensity, distance, temperature, rainfall signal
The STC89C52 single chip of part.
Wherein, as shown in Fig. 2 lighting circuit includes some groups of light emitting diodes being connected in parallel；Some light emitting diodes
Circle part and sign are formed, sign printed words are inside the circle part；Light emitting diode is to be controlled by light-operated loop
The high brightness red LED lamp of system, the effect that red is used for early warning is good, can more cause the attention of operating personnel.
As shown in figure 3, light-operated circuit includes photo resistance R46, LM393 twin voltage comparator and NCE3010S field-effects
Pipe, photo resistance R46 and LM393 twin voltage comparators are connected in parallel, and LM393 twin voltage comparators are connected to NCE3010S fields
The input of effect pipe, control lighting circuit is not worked on daytime, only light at night, and the energy is saved in power saving.
As shown in figure 4, sound loop includes binding post P1, SC5020B speech chip, MD8002A Audio power amplifiers
Device, LS1 loudspeakers and electric capacity C1, C2, binding post P1 are connected with the pin PA0/KEY of SC5020B speech chips, electric capacity C1
It is series between the pin IN- of pin PWM1/DAC and MD8002A audio-frequency power amplifier of SC5020B speech chips, electric capacity C2
It is series between the pin IN+ of MD8002A audio-frequency power amplifiers and pin GND, LS1 loudspeaker in series is connected to MD8002A
Between pin VO+, the pin VO- of audio-frequency power amplifier；There is burning in SC5020B speech chips " pays attention to：Work herein " " note
Meaning：The caveat such as No switching on ", when the ambient signal detected reaches trigger condition, central control module control control language
The corresponding caveat of sound chip repeatedly broadcasting, raised one's voice via being transmitted after MD8002A audio-frequency power amplifier power amplifications to LS1
Device, and exported by LS1 loudspeakers.
As shown in figure 5, power circuit includes binding post P2, LM7805 three terminal regulator and electric capacity C3, C4, C5, C6,
Electric capacity C3, C4 are parallel to the input IN of LM7805 three terminal regulators, earth terminal GND both ends, and electric capacity C5, C6 are parallel to
The output end OUT of LM7805 three terminal regulators, earth terminal GND both ends, binding post P2 is in parallel with electric capacity C3, binding post P2
It is connected with 12V working powers, 12V supply voltages export the power supply electricity for 5V in the presence of electric capacity and LM7805 three terminal regulators
Pressure.
The concrete application method of the present embodiment is as follows：
S1. lighting circuit and the trigger condition in sound loop are installed additional in STC89C52 single chip：Light intensity threshold value, distance
Threshold value, temperature threshold, rainfall threshold value；
S2. after step S1, the burning " attention in SC5020B speech chips：Work herein ", " pay attention to：The languages such as No switching on "
Sound prompt message；
S3. after step S2, when the light intensity that light level module detects is less than light intensity threshold value, center control
Module controls lighting circuit normal work, and central control module control high brightness red LED lamp lights；When light level module is examined
When the light intensity measured is higher than light intensity threshold value, central control module control high brightness red LED lamp is extinguished；
S4. after step S2, when Distance-sensing module has detected that mobile object distance marker board is less than distance threshold, in
Entreat control module control sound loop to play " to pay attention to：Working herein " voice messaging to be to remind shift member；
S5. after step S2, when temperature sensing module detects that current work premise temperature is higher than design temperature threshold value, in
Centre control module control sound loop plays " attention high temperature " voice messaging to remind working member to pay attention to working caused by high temperature
Risk；
S6. after step S2, when rainfall sensing module detects current work premise temperature higher than setting rainfall threshold value, in
Centre control module control sound loop plays " attention heavy rain " voice messaging to remind working member to pay attention to working caused by heavy rain
Risk.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement made within the spirit and principle of invention etc., should be included in the claims in the present invention
Protection domain within.
Claims (10)
1. a kind of Intelligent acousto-optic prompts mark system, it is characterised in that in being connected including power circuit and with power circuit
Entreat control module, light level module, Distance-sensing module, temperature sensing module and rainfall sensing module, the light level
Module, Distance-sensing module, temperature sensing module and rainfall sensing module are connected to the input of the central control module, institute
The output end for stating central control module is connected with light-operated loop, the lighting circuit for luminous lighting prompting and for voice message
Sound loop, the lighting circuit is connected with light-operated circuit communication.
2. Intelligent acousto-optic according to claim 1 prompts mark system, it is characterised in that the lighting circuit includes some
The light emitting diode that group is connected in parallel；Some light emitting diodes form circle part and sign, the sign are set
Inside the circle part.
3. Intelligent acousto-optic according to claim 2 prompts mark system, it is characterised in that the light emitting diode is light
Control the red LED lamp of circuit controls.
4. Intelligent acousto-optic according to claim 1 prompts mark system, it is characterised in that the light-operated circuit includes photosensitive
Resistance R46, LM393 twin voltage comparator and NCE3010S FETs, the photo resistance R46 and LM393 twin voltages ratio
It is connected in parallel compared with device, the LM393 twin voltages comparator is connected to the input of NCE3010S FETs.
5. Intelligent acousto-optic according to claim 1 prompts mark system, it is characterised in that the sound loop includes wiring
Terminals P 1, SC5020B speech chips, MD8002A audio-frequency power amplifiers, LS1 loudspeakers and electric capacity C1, C2, the wiring
Terminals P 1 is connected with the pin PA0/KEY of SC5020B speech chips, and the electric capacity C1 is series at drawing for SC5020B speech chips
Between the pin IN- of pin PWM1/DAC and MD8002A audio-frequency power amplifier, the electric capacity C2 is series at MD8002A audio powers
Between the pin IN+ and pin GND of amplifier, the LS1 loudspeaker in series is connected to the MD8002A audio-frequency power amplifiers
Pin VO+, pin VO- between.
6. Intelligent acousto-optic according to claim 1 prompts mark system, it is characterised in that the power circuit includes wiring
Terminals P 2, LM7805 three terminal regulators and electric capacity C3, C4, C5, C6, described electric capacity C3, C4 are parallel to the ends of LM7805 tri-
The input IN of voltage-stablizer, earth terminal GND both ends, described electric capacity C5, C6 are parallel to the defeated of the LM7805 three terminal regulators
Go out to hold OUT, earth terminal GND both ends, the binding post P2 is in parallel with electric capacity C3.
7. the Intelligent acousto-optic prompting mark system according to any one of claim 1 to 6, it is characterised in that the intelligent sound
Light prompting mark system also includes the chargeable built-in lithium cell modules of 12V/500mAH, and the lithium battery module is provided with charging
Interface, solar panel is electrically connected with the charging inlet.
8. the Intelligent acousto-optic prompting mark system according to any one of claim 1 to 6, it is characterised in that the center control
The output end of molding block is also associated with being used to show light level module, Distance-sensing module, temperature sensing module, rainfall sensing
Light intensity, distance, temperature, the display module of rainfall of module monitors.
9. the Intelligent acousto-optic prompting mark system according to any one of claim 1 to 6, it is characterised in that the center control
Molding block is to add light intensity, distance, temperature, the STC89C52 single chip of the trigger condition of rainfall signal.
A kind of 10. Intelligent acousto-optic prompting mark systematic difference method, it is characterised in that the described method comprises the following steps：
S1. lighting circuit and the trigger condition in sound loop are installed additional in STC89C52 single chip：Light intensity threshold value, distance
Threshold value, temperature threshold, rainfall threshold value；
S2. after step S1, the burning " attention in SC5020B speech chips：Work herein ", " pay attention to：The languages such as No switching on "
Sound prompt message；
S3. after step S2, when the light intensity that light level module detects is less than light intensity threshold value, center control
Module controls lighting circuit normal work, and central control module control high brightness red LED lamp lights；When light level module is examined
When the light intensity measured is higher than light intensity threshold value, central control module control high brightness red LED lamp is extinguished；
S4. after step S2, when Distance-sensing module has detected that mobile object distance marker board is less than distance threshold, in
Entreat control module control sound loop to play " to pay attention to：Working herein " voice messaging to be to remind shift member；
S5. after step S2, when temperature sensing module detects that current work premise temperature is higher than design temperature threshold value, in
Centre control module control sound loop plays " attention high temperature " voice messaging to remind working member to pay attention to working caused by high temperature
Risk；
S6. after step S2, when rainfall sensing module detects current work premise temperature higher than setting rainfall threshold value, in
Centre control module control sound loop plays " attention heavy rain " voice messaging to remind working member to pay attention to working caused by heavy rain
Risk.
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| CN201710823736.2A CN107452179A (en) | 2017-09-13 | 2017-09-13 | A kind of Intelligent acousto-optic prompting mark system and its application process |
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| CN201710823736.2A CN107452179A (en) | 2017-09-13 | 2017-09-13 | A kind of Intelligent acousto-optic prompting mark system and its application process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110867033A (en) * | 2019-10-30 | 2020-03-06 | 湖南考思特电子有限公司 | Light-operated warning system of engineering machinery |
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| CN207302288U (en) * | 2017-09-13 | 2018-05-01 | 广东电网有限责任公司阳江供电局 | A kind of Intelligent acousto-optic prompts mark system |
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| CN110867033A (en) * | 2019-10-30 | 2020-03-06 | 湖南考思特电子有限公司 | Light-operated warning system of engineering machinery |
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Application publication date: 20171208 |