CN105547393A - Device for recognizing digital code wheel reading through closed space camera shooting - Google Patents
Device for recognizing digital code wheel reading through closed space camera shooting Download PDFInfo
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- CN105547393A CN105547393A CN201610053289.2A CN201610053289A CN105547393A CN 105547393 A CN105547393 A CN 105547393A CN 201610053289 A CN201610053289 A CN 201610053289A CN 105547393 A CN105547393 A CN 105547393A
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- shell
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- character wheel
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/06—Indicating or recording devices
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Abstract
The invention relates to a device for recognizing a digital code wheel reading through closed space camera shooting. The device comprises a shell. An electronic bin is arranged inside the shell. A half transparent and half reflecting mirror is arranged in the electronic bin. A CMOS camera and a circuit board are arranged on the opposite side of the half transparent and half reflecting mirror. Light-compensating lamps are arranged on the two sides of the CMOS camera. A transparent window is arranged on the top of the electronic bin. A liquid crystal light valve capable of electrically controlling transmittance of light is arranged on the position, close to the inner side of the shell, of the transparent window above the shell. Due to the arrangement of the half transparent and half reflecting mirror and the liquid crystal light valve capable of electrically controlling transmittance of light and the unique light compensating design in an auxiliary mode, the digital code wheel reading is precisely recognized; meanwhile, the manual observation window is arranged, so that manual reading is not affected; the device can be directly stuck and fixed to an original water meter and is low in cost, high in reliability and wide in implementation range.
Description
Technical field
The present invention relates to detection technique field, particularly relate to a kind of device of confined space imaging identification character wheel reading.
Background technology
Along with the progress of technology, the automatic copy reading adopting electronization to realize three tables (water meter, ammeter, gas meter, flow meter) is inexorable trend, effectively can save human cost, reduces workload, the awkward situation that avoiding knocks at the door from house to house checks meter, and can stop leak to copy the problem of by mistake copying.The water meter of current use, gas meter, flow meter is not electronic type, and also do not have communication interface, realizing remote reading has a lot of difficulty.Although having existed now can electronic water meter, the digital gas meter of remote reading, all need to realize remote reading by changing table, workload is larger, and cost is high.
Current character wheel meter reading technology roughly has several as follows, but has its drawback and deficiency:
(1) tongue tube or similar scheme: place strong magnet on character wheel, then puts the similar pick-up unit of a tongue tube in off-balancesheet face, and character wheel often turns around tongue tube adhesive once, thus is added up the number of turns of character wheel by adhesive number of times.Be easy to the impact by external magnetic field, and this pick-up unit wants a direct power supply, this system for this kind of not charged of water meter can be used hardly.
(2) based on photoelectric tube correlation scheme: this scheme designs several through hole on character wheel, then place luminotron in character wheel side, opposite side places photosensitive tube, after luminotron luminescence, by reading the state of photosensitive tube, the anglec of rotation of character wheel can be known, thus identify reading.This scheme cost is low, but needs his-and-hers watches transformation, can not be power to already present water meter.
(3) external optoelectronic pipe correlation scheme: this scheme is that the one of (2) is improved, by installing a small magnet on water meter indicator, then magnetic coupling device and character wheel is placed at water gage glass place, thus the rotation of two character wheels is synchronously got up, have do not need a direct power supply and do not need significantly to transform water meter advantage.But easily by magnetic interference.
(4) camera reads character wheel image.Also rest on acquisition character wheel image at present, not fine surround lighting to be controlled, effectively can not identify numeral.In addition, not to staying view window, device is too thick too large, and be unfavorable for installing and using, this scheme is seldom used.
Summary of the invention
In order to overcome above-mentioned defect, the invention provides a kind of device of confined space imaging identification character wheel reading, to read for water meter character wheel numeral better.
To achieve these goals, technical scheme of the present invention is as follows.
A device for confined space imaging identification character wheel reading, comprise shell, described enclosure is provided with electronics storehouse; Inside, described electronics storehouse is provided with semi-transparent semi-reflecting lens, the opposite of described semi-transparent semi-reflecting lens is provided with CMOS camera and circuit board, CMOS camera both sides are provided with light compensating lamp, described electronics storehouse is not provided with transparency window up and down, and be provided with inside the outer shell in transparency window position above shell can the liquid crystal light valve of automatically controlled penetrability; Transparency window top is provided with dust cap, and is furnished with elastic force apparatus, being in closed condition without this enclosing cover during External Force Acting.
Further, semi-transparent semi-reflecting lens to the reflecting rate of white light and transmittance all about 50%.Semi-transparent semi-reflecting lens is placed on the top of transparency window below shell, with transparency window plane below shell in angle of 45 degrees.After this device installs, this half-reflecting half mirror just in time just to character wheel code-disc, therefore semi-transparent semi-reflecting lens by character wheel code-disc video imaging in CMOS camera dead ahead.The light part that character wheel code-disc emits enters CMOS camera through the reflection of semi-transparent semi-reflecting lens; Transparency window above another part light transmission semi-transparent semi-reflecting lens directive, and finally through transparency window, check reading for human eye.Adopt semi-transparent semi-reflecting lens that optical angle be have rotated 90 degree, coordinate the CMOS camera of short focus, therefore this crust of the device THICKNESS CONTROL is to about 20mm.
Further, above shell, be provided with can the liquid-crystalline glasses of automatically controlled penetrability at the inside surface place of transparency window.Completely transparent when this liquid-crystalline glasses does not power up, check meter reading through this liquid-crystalline glasses and half-reflecting half mirror.When needs reading, can power up liquid-crystalline glasses, thus not allow extraneous light enter this device, thus avoid the impact of ambient light on reading.This liquid-crystalline glasses and shell top view window are in the same size, operate the same with common segment liquid crystal, just only have one rectangular " section ", whether can control the printing opacity of this section by two pins.
Further, be provided with a transparency window above and below shell respectively, other positions of shell are opaque.Transparency window above shell is used for human eye and reads character wheel information, and the transparency window below shell allows the light shot out from character wheel enter camera and human eye.Other parts of shell adopt frosting technology, avoid surround lighting to enter housing, have an impact to the reading of camera.And enclosure have employed pastes black paper and spraying coating process, reduces surround lighting further and enters housing.
Further, semi-transparent semi-reflecting lens both sides are provided with white light LEDs as light compensating lamp.Light filling LED throws light on from both sides to character wheel, and LED center light emission direction becomes about 18 degree angles with below transparency window.
Further, be provided with one-chip computer module in circuit board, one-chip computer module comprises single-chip microcomputer, single-chip microcomputer is connected with communication module, CMOS camera module and light compensating lamp.
Further, shell is made up of upper and lower two parts, has O-ring seal in the middle of two parts, ensures the rear water-tight of assembling.Shell adopts cylindrical configuration, can be bonded on water gage glass face with glue very easily.Lower casing is provided with transparency window, arranges semi-transparent semi-reflecting lens above window; In addition, above shell, be provided with enclosing cover, and be furnished with elastic force apparatus, without during External Force Acting this form enclosing cover close.
Single-chip microcomputer is 32 bit processors, and built-in FLASH and RAM reduce costs and volume.There is processing power fast, mass data that CMOS camera module transfer comes can be accepted and store process.Single-chip microcomputer by detecting the frame synchronizing signal of camera, thus identifies the beginning of a frame.And the gradation data of each pixel is correctly caught by synchronizing clock signals.Configuration interface by camera chip after single-chip microcomputer powers on is configured it, opens light compensating lamp, and catches image information.By the morphological feature identification to image, thus image is converted to digital signal.
This beneficial effect of the invention is: this device, by arranging semi-transparent semi-reflecting lens and can the liquid crystal light valve of automatically controlled penetrability, is aided with unique light filling design, thus achieves the accurate identification of wheel digital; And be provided with manual observation window, do not affect artificial reading; This device can directly be pasted and fixed on original water meter, has low cost, high reliability and widely implementation.
Accompanying drawing explanation
Device vertical structure schematic diagram in Fig. 1, the embodiment of the present invention.
The plan structure schematic diagram of Fig. 2, embodiment of the present invention device.
The functional block diagram of Fig. 3, embodiment of the present invention device.
Description of symbols in figure: 1, can the liquid crystal light valve of automatically controlled penetrability; 2, circuit board; 3, CMOS camera; 4, light compensating lamp; 5, water meter; 6, character wheel code-disc; 7, semi-transparent semi-reflecting lens; 8, electronics storehouse; 9, transparency window; 10, dust cap.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described, better to understand the present invention.
Embodiment
Confined space imaging identification print wheel reading device as described in Figure 1, comprise shell, enclosure is provided with electronics storehouse 8, inside, electronics storehouse 8 is provided with semi-transparent semi-reflecting lens 7, semi-transparent semi-reflecting lens 7 is arranged on electronics storehouse 8 bottom position, the opposite of semi-transparent semi-reflecting lens 7 is provided with CMOS camera and circuit board, and half-reflecting half mirror both sides are provided with light compensating lamp 4, and light compensating lamp 4 is white light light filling LED; Shell upper and lower respectively has a transparency window 9, and transparency window 9 top is provided with dust cap 10, and is furnished with elastic force apparatus, being in closed condition without this enclosing cover during External Force Acting.Top, electronics storehouse 8 is provided with transparency window 9, and being provided with inside the outer shell in transparency window 9 position above shell can the liquid crystal light valve 1 of automatically controlled penetrability.The glass that this crust of the device is placed on water meter 5 uses.Fig. 2 is the plan structure schematic diagram of embodiment of the present invention device.Fig. 3 is the functional block diagram of embodiment of the present invention device.
As shown in Figure 3, be provided with one-chip computer module in circuit board, one-chip computer module comprises single-chip microcomputer, single-chip microcomputer is connected with communication module, CMOS camera module and light compensating lamp.
CMOS camera 3 comprises CMOS camera chip and camera lens; CMOS camera chip adopts CSP encapsulation, has the sharpness of 300,000 pixels.Camera lens is the camera lens of short focus.CMOS camera chip adopts synchronous bus that image gradation data is transferred to single-chip microcomputer.
As shown in Figure 1, semi-transparent semi-reflecting lens 7 is placed on the top of transparency window below shell, semi-transparent semi-reflecting lens 7 and below transparency window 9 in angle of 45 degrees, by the video imaging of character wheel code-disc 6 in CMOS camera 3 dead ahead.The light part that character wheel code-disc 6 emits enters CMOS camera 3 through semi-transparent semi-reflecting lens 7, and another part is penetrated by the transparency window 9 of top.
Shell is made up of upper and lower two parts, adds rubber blanket between two parts, adopts and is screwed two parts.Shell adopts the cylindrical configuration consistent with water meter, can be bonded on table tool outside surface with glue very easily.Upper casing has rectangular manual observation window, and user can see digital character wheel and the instruction of all decimal place runners by this window.Except upper and lower transparent window, other parts of shell adopt frosting technology, paste black paper technique and spraying coating process, ensure light tight, reduce surround lighting and to take pictures on camera the impact of effect.In addition, have enclosing cover in upper casing arranged outside, and be furnished with elastic force apparatus, without during External Force Acting this enclosing cover close.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (7)
1. the device of a confined space imaging identification character wheel reading, comprise shell, it is characterized in that: described enclosure is provided with electronics storehouse, inside, described electronics storehouse is provided with semi-transparent semi-reflecting lens, the opposite of described semi-transparent semi-reflecting lens is provided with CMOS camera and circuit board, CMOS camera both sides are provided with light compensating lamp, and top, described electronics storehouse is provided with transparency window, and be provided with inside the outer shell in transparency window position above shell can the liquid crystal light valve of automatically controlled penetrability; Transparency window top is provided with dust cap, and is furnished with elastic force apparatus.
2. the device of confined space imaging identification character wheel reading according to claim 1, is characterized in that: described semi-transparent semi-reflecting lens can antireflection part light and through a part of light; Semi-transparent semi-reflecting lens is placed on the top of transparency window below shell, with transparency window plane below shell in angle of 45 degrees.
3. the device of confined space imaging identification character wheel reading according to claim 1, is characterized in that: above described shell, be provided with can the liquid crystal light valve of automatically controlled penetrability at the inside surface place of transparency window.
4. the device of confined space imaging identification character wheel reading according to claim 1, is characterized in that: be provided with a transparency window above and below described shell respectively, other positions of shell are opaque.
5. the device of confined space imaging identification character wheel reading according to claim 1, is characterized in that: described semi-transparent semi-reflecting lens both sides are provided with white light LEDs as light compensating lamp.
6. the device of confined space imaging identification character wheel reading according to claim 1, it is characterized in that: in circuit board, be provided with one-chip computer module, one-chip computer module comprises single-chip microcomputer, single-chip microcomputer is connected with communication module, CMOS camera module and light compensating lamp.
7. the device of confined space imaging identification character wheel reading according to claim 1, is characterized in that: described shell is made up of upper and lower two parts, has O-ring seal in the middle of two parts, ensures the rear water-tight of assembling; Shell adopts cylindrical configuration; Lower casing has the transparent window corresponding with character wheel code-disc, has semi-transparent semi-reflecting lens above transparent window; Upper casing is provided with manual observation window, upper casing outer setting has enclosing cover, and is furnished with elastic force apparatus, being in closed condition without this enclosing cover during External Force Acting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610053289.2A CN105547393A (en) | 2016-01-27 | 2016-01-27 | Device for recognizing digital code wheel reading through closed space camera shooting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610053289.2A CN105547393A (en) | 2016-01-27 | 2016-01-27 | Device for recognizing digital code wheel reading through closed space camera shooting |
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| Publication Number | Publication Date |
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| CN105547393A true CN105547393A (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610053289.2A Pending CN105547393A (en) | 2016-01-27 | 2016-01-27 | Device for recognizing digital code wheel reading through closed space camera shooting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174847A (en) * | 2018-11-09 | 2020-05-19 | 群光电子股份有限公司 | Auxiliary module of meter |
| US11156489B2 (en) | 2018-11-01 | 2021-10-26 | Chicony Electronics Co., Ltd. | Volume meter auxiliary module assembled on the fluid volume meter to digitalize the values |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0250800A (en) * | 1988-08-12 | 1990-02-20 | Aichi Tokei Denki Co Ltd | Meter sensor for automatic meter reading for water meter of the like |
| CN2641599Y (en) * | 2003-06-30 | 2004-09-15 | 孙殿佩 | Dismounting-resistant all LCD non-contact type IC card inelligent watermeter |
| CN201593988U (en) * | 2009-03-05 | 2010-09-29 | 杭州国禹科技有限公司 | Camera-shooting intelligent reading meter |
| CN202748078U (en) * | 2012-07-03 | 2013-02-20 | 天津市金佳同达科技有限公司 | Digital water meter |
| CN104134336A (en) * | 2014-03-07 | 2014-11-05 | 深圳浩宁达仪表股份有限公司 | Meter reading system and meter reading method preventing external light influence |
| CN204929105U (en) * | 2015-09-30 | 2015-12-30 | 青岛东软载波智能电子有限公司 | Adopt little electromechanical device of camera discernment character wheel sign indicating number |
| CN205373799U (en) * | 2016-01-27 | 2016-07-06 | 青岛东软载波智能电子有限公司 | Make a video recording and discern device of character wheel reading in airtight space |
-
2016
- 2016-01-27 CN CN201610053289.2A patent/CN105547393A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0250800A (en) * | 1988-08-12 | 1990-02-20 | Aichi Tokei Denki Co Ltd | Meter sensor for automatic meter reading for water meter of the like |
| CN2641599Y (en) * | 2003-06-30 | 2004-09-15 | 孙殿佩 | Dismounting-resistant all LCD non-contact type IC card inelligent watermeter |
| CN201593988U (en) * | 2009-03-05 | 2010-09-29 | 杭州国禹科技有限公司 | Camera-shooting intelligent reading meter |
| CN202748078U (en) * | 2012-07-03 | 2013-02-20 | 天津市金佳同达科技有限公司 | Digital water meter |
| CN104134336A (en) * | 2014-03-07 | 2014-11-05 | 深圳浩宁达仪表股份有限公司 | Meter reading system and meter reading method preventing external light influence |
| CN204929105U (en) * | 2015-09-30 | 2015-12-30 | 青岛东软载波智能电子有限公司 | Adopt little electromechanical device of camera discernment character wheel sign indicating number |
| CN205373799U (en) * | 2016-01-27 | 2016-07-06 | 青岛东软载波智能电子有限公司 | Make a video recording and discern device of character wheel reading in airtight space |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11156489B2 (en) | 2018-11-01 | 2021-10-26 | Chicony Electronics Co., Ltd. | Volume meter auxiliary module assembled on the fluid volume meter to digitalize the values |
| CN111174847A (en) * | 2018-11-09 | 2020-05-19 | 群光电子股份有限公司 | Auxiliary module of meter |
| CN111174847B (en) * | 2018-11-09 | 2021-09-07 | 群光电子股份有限公司 | Auxiliary module of meter |
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Application publication date: 20160504 |