CN109490807A - Display instrument automatic recognition system and method for calibration based on image processing techniques - Google Patents
Display instrument automatic recognition system and method for calibration based on image processing techniques Download PDFInfo
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- CN109490807A CN109490807A CN201811431806.0A CN201811431806A CN109490807A CN 109490807 A CN109490807 A CN 109490807A CN 201811431806 A CN201811431806 A CN 201811431806A CN 109490807 A CN109490807 A CN 109490807A
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- light source
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/90—Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums
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- Engineering & Computer Science (AREA)
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- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Factory Administration (AREA)
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Abstract
The display instrument automatic recognition system based on image processing techniques that the invention discloses a kind of, it is characterized by: the automatic recognition system includes a verification standard set-up and a PC machine, the verification standard set-up includes bracket, sliding rail, two industrial cameras, two light source components, two camera frames and two instrument calibrations.Automatic recognition system of the present invention controls the display data that industrial camera shoots standard scale and taken temperature simultaneously by PC machine, effectively reduce the interference of human factor in conventional method, substantially increase the interpretation accuracy of digital high voltage table, instrumented data saves in the form of images, it is subsequent to transfer inspection at any time, it is effectively guaranteed the authenticity and objectivity of data.Automatic recognition system of the present invention provides a kind of novel verification standard set-up for above-mentioned control method simultaneously, and structural planning is reasonable, easy to operate, it is easy to accomplish, and it is suitble to a variety of places, it is suitble to promote the use of.
Description
Technical field
The present invention relates to digital high voltage table calibration technology fields, are specifically related to the display instrument based on image processing techniques
Automatic recognition system and method for calibration.
Background technique
Digital high voltage table is ac high voltage and (or) DC high voltage of the measurement frequency range in 30Hz ~ 300Hz
A kind of instrument.Digital high voltage table is widely used to electric system and electric appliance, electronic equipment manufacturing department, with electric-power metering row
The demand of the continuous development of industry, digital high voltage table was significantly increased more in the past.According to " DL/T973-2005 digital high voltage table calibrating rule
Journey " regulation, re-testing periods of digital high voltage table are 1 year.Using frequently and degrade use digital high voltage table (including it is overproof after
Carry out the digital high voltage table of error transfer factor), the re-testing periods should shorten to half a year.
The calibration method of digital high voltage table is mainly direct comparison method: in verification process, testing person reads simultaneously simultaneously
Record standard table and the instrumented data taken temperature, the phase for calculating standard scale according to the calculation formula that regulation provides and being taken temperature
To error, intrinsic standoff ratio and standard error, the class of accuracy taken temperature is determined.But due to the jump of digital high voltage table data frequency
Rate is fast, and the numerical character residence time is short, and human eye needs interpretation simultaneously simultaneously record standard table and the data taken temperature, the synchronization of data
Property is poor, and accuracy is low.And the reading of pointer instrument data is influenced by the angle that testing person records, there is also accuracy of identification
The problem of difference.Manual record data digital high pressure gauge, the authenticity and reliability of data depend entirely on the calibrating of record personnel
Experience and detection capability, seriously affect the accuracy of verification, and systematic error is larger.To sum up, digital high voltage table verification process
Middle traditional interpretation method accuracy is low, and systematic error is big, and human interference factor is more.
Summary of the invention
In view of the problems of the existing technology, technical purpose of the invention is to provide a kind of aobvious based on image processing techniques
Show instrument automatic identification system and method for calibration, can overcome the deficiencies of existing technologies, and is suitable for various digital high voltage tables
Verification.
Technical solution provided by the invention are as follows:
A kind of display instrument automatic recognition system based on image processing techniques, it is characterised in that:
The automatic recognition system include a verification standard set-up and a PC machine, the verification standard set-up include bracket,
Sliding rail, two industrial cameras, two light source components, two camera frames and two instrument calibrations；
The middle position of the sliding rail is rack-mount by big holder, and two camera frames are respectively mounted on a list by small holder
On only coaster, the coaster installation on the slide rail, move two camera frames can along sliding rail；Two instrument calibrations also pass through cunning respectively
Vehicle is installed on the sliding rail, and the front and rear sides of two camera frames are located at；
The camera frame includes light source mounting plate, phase machine frame and the first connector, and phase machine frame is fixed on institute by the first connector
It states on small holder, is used for mounting industrial camera；The top of phase machine frame is arranged in the light source mounting plate, for installing light source component,
The light emission direction of the light source component and the camera lens of industrial camera is not opposite；
The instrument calibration includes instrument frame, position-limit mechanism and the second connector, and the instrument frame is for placing instrument, the limit
Mechanism is used for limit tightening of the instrument in instrument frame, and instrument frame is mounted on the coaster by second connector；
The control signal output of the PC machine is connect with the driving signal receiving end of two industrial cameras, for triggering two industry
Camera drives simultaneously；The data signal input of PC machine is connect with the data signal output of two industrial cameras, receives industrial phase
The image information of machine acquisition.
On the basis of above scheme, further improvement or preferred scheme further include:
The sliding rail is made of two parallel fiber-glass poles, and the upper surface of the big holder is correspondingly provided with the installation of two flat shapes
Slot, two fiber-glass poles can be moved forward and backward in mounting groove under external force in two mounting grooves.
The left and right ends of the coaster are equipped with the clip being stuck on fiber-glass pole.
The instrument frame is in U shape, including bottom plate and left and right two side walls, top opening；The position-limit mechanism includes
Two stop screws in left and right, the stop screw are mounted on the side wall of instrument frame, when installing instrument, by screwing screw for instrument
Table is clamped from the left and right sides.
The phase machine frame is in box shape, and inside is equipped with a horizontal limit plate, the limit plate and the tune being positioned above
Screw rod connection is saved, the adjusting screw rod is mounted on the top plate of phase machine frame, it can control limit plate lifting by screwing adjusting screw rod,
For clamping industrial camera.
The light source mounting plate is permeability magnetic material, and the pedestal of the light source component is equipped with magnet, is fixed by magnetic-adsorption
On light source mounting plate, easy to disassemble and replacement.
In a tubular form, light emission direction is consistent with industrial camera lens for the light source component.
The height of the camera frame bottom surface is not less than the top surface of instrument calibration, when being taken temperature or standard scale cannot be mounted on instrument
When on frame, the case where to avoid industrial camera from being blocked by instrument calibration as far as possible.
A kind of instrument check method based on automatic recognition system as described above, which comprises the following steps:
1) being taken temperature for hand-held is mounted on instrument calibration with standard scale, makes direction of its display screen towards camera frame, passes through
Position-limit mechanism clamps；Two industrial cameras and light source component are separately mounted on two camera frames；
2) small holder, the display screen for making two industrial cameras be respectively aligned to be taken temperature with standard scale are adjusted；Coaster is adjusted in sliding rail
On position, so that industrial camera and display screen is focused；Light source component is selectively turned on, to illuminate the display taken temperature with standard scale
Screen；
3) industrial camera and PC machine are connected, will be taken temperature according to regulation and be accessed in operating circuit with standard scale, and start operation；
4) two industrial cameras are triggered by PC machine and acquires the display image taken temperature with standard scale simultaneously, receive and store two works
The image information that industry camera is sent is compared for verifying.
A kind of instrument check method based on automatic recognition system as described above, when taken temperature or standard scale at least one
It is a when cannot be mounted on instrument calibration, which comprises the following steps:
1) two industrial cameras and light source component are separately mounted on two camera frames；
2) big holder is adjusted, makes sliding rail as close as possible to the instrument that cannot be mounted on instrument calibration；Small holder is adjusted, two industry are made
Camera is respectively aligned to the display screen taken temperature with standard scale；The position of coaster on the slide rail is adjusted, industrial camera and display screen are made
Focusing；Light source component is selectively turned on, to illuminate the display screen taken temperature with standard scale；
2) industrial camera and PC machine are connected, will be taken temperature according to regulation and be accessed in operating circuit with standard scale, and start operation；
3) two industrial cameras are triggered by PC machine and acquires the display image taken temperature with standard scale simultaneously, receive and store two works
The image information that industry camera is sent is compared for verifying.
The utility model has the advantages that
Automatic recognition system of the present invention controls the display data that industrial camera shoots standard scale and taken temperature simultaneously by PC machine, has
Effect ground reduces the interference of human factor in conventional method, substantially increases the interpretation accuracy of digital high voltage table, instrumented data
It saves in the form of images, it is subsequent to transfer inspection at any time, it is effectively guaranteed the authenticity and objectivity of data.This hair simultaneously
Bright automatic recognition system provides a kind of novel verification standard set-up for above-mentioned control method, and structural planning is reasonable, operation
It is convenient, it is easy to accomplish, and it is suitble to a variety of places, it is suitble to promote the use of.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of automatic recognition system lieutenant colonel standard inspection standard apparatus of the present invention；
Fig. 2 is the workflow block diagram of PC machine；
Fig. 3 is the structural schematic diagram of camera frame；
Fig. 4 is the structural schematic diagram of instrument calibration；
Appended drawing reference: 1-bracket；2-big holders；3-sliding rails；4-camera frames 1；4-1-light source mounting plate；4-2-camera
Frame；The first connector of 4-3-；5-small holders；6-coasters；7-camera frames；8-small holders；9-coasters；10-instrument calibrations；
10-1-position-limit mechanism；10-2-instrument frame；10-3-second；11-instrument calibrations.
Specific embodiment
In order to which technical solution of the present invention and working principle is elaborated, with reference to the accompanying drawing with specific embodiment to this hair
It is bright to do specific introduction.
A kind of display instrument automatic recognition system based on image processing techniques, including a verification standard set-up and one
PC machine, as shown in Figure 1, the verification standard set-up includes bracket 1,3, two industrial cameras of sliding rail, two light source components, two phases
Rack and two instrument calibrations etc. form component.
The sliding rail 3 is constituted using two parallel fiber-glass poles, and intermediate position is mounted on A-frame by big holder 2
On 1.The upper surface of the big holder 2 is correspondingly provided with the mounting groove of two flat shapes, and two fiber-glass poles are embedded in respectively in two mounting grooves, Buddhist nun
Imperial bar can be moved forward and backward under external force on big holder 2, when system works, by frictional force or be aided with position limiting structure locking
It is fixed on big holder 2.Camera frame 4 is mounted on coaster 6 by small holder 5, and camera frame 7 is mounted on coaster 9 by small holder 8
On.Two instrument calibrations 9 and 11 are also installed on the sliding rail 3 by coaster respectively, positioned at the front and rear sides of two camera frames 4 and 7, such as
Shown in Fig. 1.
Two-phase rack construction is identical, by taking camera frame 4 as an example, as shown in figure 3, the camera frame 4 includes light source mounting plate 4-
1, phase machine frame 4-2 and the first connector 4-3, phase machine frame 4-2 are fixed on the small holder 5 by the first connector 4-3, are used for
One industrial camera is installed.The top of phase machine frame 4-2 is arranged in the light source mounting plate 4-1, for installing light source component.Installation
When, the light emission direction of the light source component and the camera lens of industrial camera is not opposite.In the present embodiment, using the light source component of tubulose, make
Light emission direction is consistent with industrial camera lens.The phase machine frame 4-2 is in box shape, and inside is equipped with a horizontal limit plate, described
Limit plate is connect with the adjusting screw rod being positioned above, and the adjusting screw rod is mounted on the top plate of phase machine frame, is adjusted by screwing
Saving screw rod can control limit plate lifting, for clamping industrial camera.The light source mounting plate 4-1 is permeability magnetic material, the present embodiment
The middle rectangular metal plate using L-type, facilitates installation.The pedestal of light source component is equipped with magnet, is fixed on light source by magnetic-adsorption
On mounting plate.The height of the case where instrument calibration cannot be mounted in view of instrument, the camera frame bottom surface may be designed as being not less than
The apical side height of instrument calibration.
Two instrument calibration structures are identical, by taking instrument calibration 10 as an example, as shown in figure 4, the instrument calibration 10 includes position-limit mechanism 10-
1, instrument frame 10-2 and the second connector 10-3.The instrument frame 10-2 is taken temperature for placement or standard scale, is in U shape,
Including bottom plate and left and right two side walls, top opening.The position-limit mechanism 10-1 is used for limit tightening of the instrument in instrument frame,
Including two stop screws in left and right, the stop screw is mounted on the side wall of instrument frame, when installing instrument, by screwing screw
Instrument is clamped from the left and right sides.Instrument frame 10-2 is mounted on the coaster by the second connector 10-3 of square block.Institute
The left and right ends for stating coaster are equipped with the clip being stuck on sliding rail fiber-glass pole.
The control signal output of the PC machine is connect with the driving signal receiving end of two industrial cameras, for driving simultaneously
Dynamic two industrial cameras.The data signal input of PC machine is connect with the data signal output of two industrial cameras, receives industrial phase
The image information of machine acquisition.
Above, the big holder, small holder are not that specification limits, but size between the two is in contrast.Great Yun
Platform, small holder can drive the structure carried thereon to rotate at 360 ° of horizontal plane, can also be with pitching and roll.
When above-mentioned automatic recognition system is used for instrument check, there are following several situations:
Embodiment one:
Described taken temperature with checklist is hand-held, and checking procedure is as follows:
1) being taken temperature for hand-held is mounted on instrument calibration with standard scale, makes direction of its display screen towards camera frame, passes through
Position-limit mechanism clamps；Two industrial cameras and light source component are separately mounted on two camera frames；
2) small holder, the display screen for making two industrial cameras be respectively aligned to be taken temperature with standard scale are adjusted；Coaster is adjusted in sliding rail
On position, so that industrial camera and display screen is focused；Light source component is selectively turned on, to illuminate the display taken temperature with standard scale
Screen；
3) industrial camera and PC machine are connected, will be taken temperature according to regulation in standard scale access operating circuit, starting operation inputs
Voltage is measured, pressure is surveyed and is shown on standard scale by conversion being taken temperature；
4) it drives the acquisition of two industrial cameras to be taken temperature with standard scale in the display image of synchronization by PC machine, receives and deposit
The image information for storing up the transmission of two industrial cameras is compared for verifying.
The operating system of the PC machine preferably uses WINDOWS10, and host computer exploitation environment preferably uses Visual
Studio2010 is equipped with camera driver and image processing program in PC machine, comprising 2 3.0 USB interfaces, for
The connection of two industrial cameras.The image of two industrial cameras acquisition can be automatic by image recognition and pre-loaded program in PC machine
Verification report is generated, if field condition allows the PC machine carried to be unable to complete above-mentioned work, it is complete also to can be reserved for the image data later period
At easy to operate.
Embodiment two:
Described taken temperature can not be mounted on instrument calibration with one in checklist, and checking procedure is as follows:
1) by hand-held taken temperature or standard scale is mounted on instrument calibration, make direction of its display screen towards camera frame, pass through
Position-limit mechanism clamps；Two industrial cameras and light source component are separately mounted on two camera frames；
2) big holder is adjusted, makes sliding rail as close as possible to the instrument that cannot be mounted on instrument calibration；Small holder is adjusted, two industry are made
Camera is respectively aligned to the display screen taken temperature with standard scale；The position of coaster on the slide rail is adjusted, industrial camera and display screen are made
Focusing；Light source component is selectively turned on, to illuminate the display screen taken temperature with standard scale；
3) industrial camera and PC machine are connect, will be taken temperature according to regulation in standard scale access operating circuit, starting operation, input is surveyed
Voltage is measured, pressure is surveyed and is shown on standard scale by conversion being taken temperature；
4) it drives two industrial cameras to acquire the display image taken temperature with standard scale simultaneously by PC machine, receives and stores two works
The image information that industry camera is sent is compared for verifying.
Embodiment three:
Described taken temperature can not be mounted on instrument calibration with checklist, and checking procedure is as follows:
1) two industrial cameras and light source component are separately mounted on two camera frames；
2) big holder is adjusted, equalization point is looked for, makes sliding rail as close as possible to two instrument；Small holder is adjusted, two industrial cameras are made
It is respectively aligned to the display screen taken temperature with standard scale；The position of coaster on the slide rail is adjusted, industrial camera and display screen is made to focus；
Light source component is selectively turned on, to illuminate the display screen taken temperature with standard scale；
3) industrial camera and PC machine are connect, will be taken temperature according to regulation in standard scale access operating circuit, starting operation, input is surveyed
Voltage is measured, pressure is surveyed and is shown on standard scale by conversion being taken temperature；
4) by PC machine trigger two industrial cameras drive simultaneously, acquire by take temperature with standard scale synchronization display screen figure
Picture receives and stores the image information of two industrial cameras transmission, compares for verifying.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, the present invention
Claimed range is delineated by the appended claims, the specification and equivalents thereof from the appended claims.
Claims (10)
1. a kind of display instrument automatic recognition system based on image processing techniques, it is characterised in that:
The automatic recognition system includes a verification standard set-up and a PC machine, and the verification standard set-up includes bracket
(1), sliding rail (3), two industrial cameras, two light source components, two camera frames and two instrument calibrations；
The middle position of the sliding rail (3) is mounted on bracket (1) by big holder (2), and two camera frames pass through small holder respectively
It is mounted on an individual coaster, the coaster installation on the slide rail, move two camera frames can along sliding rail；Two instrument calibrations
It is installed on the sliding rail by coaster respectively, is located at the front and rear sides of two camera frames；
The camera frame includes light source mounting plate, phase machine frame and the first connector, and phase machine frame is fixed on institute by the first connector
It states on small holder, is used for mounting industrial camera；The top of phase machine frame is arranged in the light source mounting plate, for installing light source component,
The light emission direction of the light source component and the camera lens of industrial camera is not opposite；
The instrument calibration includes instrument frame, position-limit mechanism and the second connector, and the instrument frame is for placing instrument, the limit
Mechanism is used for limit tightening of the instrument in instrument frame, and instrument frame is mounted on the coaster by second connector；
The control signal output of the PC machine is connect with the driving signal receiving end of two industrial cameras, for triggering two industry
Camera drives simultaneously；The data signal input of PC machine is connect with the data signal output of two industrial cameras, receives industrial phase
The image information of machine acquisition.
2. a kind of display instrument automatic recognition system based on image processing techniques according to claim 1, feature exist
In, the sliding rail is made of two parallel fiber-glass poles, and the upper surface of the big holder is correspondingly provided with the mounting groove of two flat shapes,
Two fiber-glass poles can be moved forward and backward in mounting groove under external force in two mounting grooves.
3. a kind of display instrument automatic recognition system based on image processing techniques according to claim 2, feature exist
In the left and right ends of the coaster are equipped with the clip being stuck on fiber-glass pole.
4. a kind of display instrument automatic recognition system based on image processing techniques according to claim 1, feature exist
In: the instrument frame is in U shape, including bottom plate and left and right two side walls, top opening；The position-limit mechanism includes left and right
Two stop screws, the stop screw are mounted on the side wall of instrument frame, install instrument when, by screw screw by instrument from
The left and right sides clamps.
5. a kind of display instrument automatic recognition system based on image processing techniques according to claim 1, feature exist
In: the phase machine frame is in box shape, and inside is equipped with a horizontal limit plate, the limit plate and the adjusting screw rod being positioned above
Connection, the adjusting screw rod are mounted on the top plate of phase machine frame, can control limit plate lifting by screwing adjusting screw rod, for pressing from both sides
Tight industrial camera.
6. a kind of display instrument automatic recognition system based on image processing techniques according to claim 1, feature exist
In: the light source mounting plate is permeability magnetic material, and the pedestal of the light source component is equipped with magnet, is fixed on light source by magnetic-adsorption
On mounting plate.
7. a kind of display instrument automatic recognition system based on image processing techniques according to claim 1, feature exist
In: in a tubular form, light emission direction is consistent with industrial camera lens for the light source component.
8. a kind of display instrument automatic identification system based on image processing techniques described in any one of -7 according to claim 1
System, it is characterised in that: the height of the camera frame bottom surface is not less than the top surface of instrument calibration.
9. a kind of instrument check method based on automatic recognition system as described in claim 1, which is characterized in that including following step
It is rapid:
1) being taken temperature for hand-held is mounted on instrument calibration with standard scale, makes direction of its display screen towards camera frame, passes through
Position-limit mechanism clamps；Two industrial cameras and light source component are separately mounted on two camera frames；
2) small holder, the display screen for making two industrial cameras be respectively aligned to be taken temperature with standard scale are adjusted；Coaster is adjusted in sliding rail
On position, so that industrial camera and display screen is focused；Light source component is selectively turned on, to illuminate the display taken temperature with standard scale
Screen；
3) industrial camera and PC machine are connected, will be taken temperature according to regulation and be accessed in operating circuit with standard scale, and start operation；
4) two industrial cameras are triggered by PC machine and acquires the display image taken temperature with standard scale simultaneously, receive and store two works
The image information that industry camera is sent is compared for verifying.
10. a kind of instrument check method based on automatic recognition system as described in claim 1, when taken temperature or standard scale in extremely
Rare one when cannot be mounted on instrument calibration, which comprises the following steps:
1) two industrial cameras and light source component are separately mounted on two camera frames；
2) big holder is adjusted, makes sliding rail as close as possible to the instrument that cannot be mounted on instrument calibration；Small holder is adjusted, two industry are made
Camera is respectively aligned to the display screen taken temperature with standard scale；The position of coaster on the slide rail is adjusted, industrial camera and display screen are made
Focusing；Light source component is selectively turned on, to illuminate the display screen taken temperature with standard scale；
3) industrial camera and PC machine are connected, will be taken temperature according to regulation and be accessed in operating circuit with standard scale, and start operation；
4) it drives two industrial cameras to acquire the display image taken temperature with standard scale simultaneously by PC machine, receives and stores two works
The image information that industry camera is sent is compared for verifying.
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| CN201811431806.0A CN109490807B (en) | 2018-11-28 | 2018-11-28 | Automatic identification system and verification method for display instrument based on image processing technology |
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| CN109490807B (en) | 2023-09-19 |
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