CN104552120A - High-precision capacitive-grating type digital-display torque spanner - Google Patents
High-precision capacitive-grating type digital-display torque spanner Download PDFInfo
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- CN104552120A CN104552120A CN201310488680.1A CN201310488680A CN104552120A CN 104552120 A CN104552120 A CN 104552120A CN 201310488680 A CN201310488680 A CN 201310488680A CN 104552120 A CN104552120 A CN 104552120A
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- grid
- spanner
- digital display
- torque
- capacitive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
- B25B23/1422—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
- B25B23/1425—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters by electrical means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to a high-precision capacitive-grating type digital-display torque spanner capable of applying torque with a determined size to screw fastening equipment and displaying the applied torque on a liquid crystal display screen in real time. The high-precision capacitive-grating type digital-display torque spanner comprises a torque sensor (1), a stressing rod (2), a digital display component (3) and a spanner handle (4). The torque sensor is used for enabling deformation quantity of an elastomer to cause relative replacement of main gratings and auxiliary gratings of the capacitive grating sensor and outputting electric quantity signals. Electrical components of the spanner are concentrated in the digital display component and include a measuring circuit, a display circuit, a warning circuit (including low-voltage warning, force limiting warning and outrange warning), a wireless data transmission interface, a data storage interface and a data interface. The high-precision capacitive-grating type digital-display torque spanner has the advantages that the capacitive grating sensor adopts the absolute capacitive grating measurement principle, so that the spanner is simple in structure, convenient to produce, low in power consumption and high in accuracy; defects in manual adjustment are made up by software correction, and product reliability and production efficiency are improved.
Description
Technical field
The present invention relates to a kind of high accuracy capacitive grid type digital display torque spanner, the moment of setting size can be applied to threaded fastener, and real-time tracking display applies the size of moment.
Background technology
Up to the present, most manufacturer all adopts response body to measure the core parts of moment as it, capacitance-grid type metering system is compared strain-type metering system and is had precision advantage high, low in energy consumption, so have extensive use in the precision optical machinery field that the performance requirements such as Aero-Space, precision optical machinery, railway, weapons are high.Particularly absolute type holds the application of grid measuring techniques, can carry out continuing to follow the tracks of to set origin position, avoid losing number, need not carry out resetting, school Z-operation.Because each position has absolute coordinate, making the software correction of error become possibility, providing technical foundation for manufacturing high-precision force moment spanner with digital display.
Force moment spanner with digital display is larger by such environmental effects, so often spanner is all needed manually to adjust torque arm length correction accuracy before dispatching from the factory, this greatly reduces production efficiency, and spanner use a period of time after need to readjust the arm of force, the manual correction time is longer, produces more maintenance cost; In addition, frame for movement regulative mode exist adjustable range little, regulate result can not overlap with the error curve of reality, cause global error bigger than normal.The present invention is in traditional precision optical machinery spanner technical foundation, adopt microprocessor programming technique, simulate error curve with software and improve the measuring precision by error correction function, both ensured that system accuracy reached 1 grade standard, the mechanical correction mode that structure regulates the arm of force can be saved again, enhance productivity.
Summary of the invention
The object of the invention is to design a kind of high accuracy capacitive grid type digital display torque spanner with data zero offset capability.There is the advantages such as high accuracy, high efficiency, low-power consumption.
Object of the present invention realizes by following measure:
A kind of high accuracy capacitive grid type digital display torque spanner, it comprises: torque sensor, boosting-rod, digital display assembly, pinch bar.Wherein, torque amount is converted into the relative shift of capacitor grid transducer by torque sensor.There are three layer circuit boards in digital display assembly, are responsible for elastomer deformation quantity to be converted to data signal, in liquid crystal screen display, and define various function.Pinch bar sentences protective jacket parcel, prevents spanner to drop damages, impact use.
Wherein:
Described torque sensor comprises retaining element and moving element, the main grid immediately below the moving element side of comprising tenon, elastomer, adapter, main grid fork, main grid spacer and spacer; Retaining element is the secondary grid be positioned at immediately below main grid that secondary grid fork and end connect.Main grid is coupled to described secondary grid in capacity coupled mode and can relative motion relative to secondary grid, elastomeric deformation quantity is delivered to secondary grid by main grid swing arm by torque sensor exactly, and main grid produces relative position relative to secondary grid and moves and then export analog electrical energy signal;
Described digital display component internal circuit board realizes all electric functions of spanner.The built-in three pieces of circuit boards of digital display assembly, are from bottom to top respectively capacitor grid transducer main grid, capacitor grid transducer secondary grid, feature board.Torsion is become the signal of telecommunication by capacitor grid transducer, and measures special chip by the absolute appearance grid be positioned on main grid circuit board and be processed into data signal and deliver to liquid crystal screen display.This data signal is transferred to the microprocessor be positioned on feature board simultaneously and processes, the various functions of definition spanner.
What described displacement sensor of variable capacitor adopted is definitely hold grid metering system, and traditional relative type motor capacitor grid transducer adopts the displacement measurement method carefully surveying number+pitch number, and can only carry out that relative displacement measures cannot accurate alignment sensor position.The absolute type capacitor grid transducer that the present invention adopts, retaining on the thin basis surveyed, add bigness scale, middle survey 2 code channels, the measurement of the capable thick precision of contraposition shift-in, medium accuracy, accurately precision respectively, achieve the absolute measurement of displacement, can accurate alignment sensor position, this provides possibility for error correction.
Described high accuracy capacitive grid type digital display torque spanner, when manually adjustment cannot reach 1 class precision, by using the microprocessor in digital display assembly on feature board to do software correction, makes display result reach required precision.
In the digital display assembly of described high accuracy capacitive grid type digital display torque spanner, feature board has external memory storage, can storage of measurement data for follow-up.In addition, measurement data also can convert the data signal that capacitor grid transducer exports to normal data bag by wireless data transmission module, is shown to computer by the antenna long-distance transmissions of spanner inside.
Described high accuracy capacitive grid type digital display torque spanner, except the most basic torgue measurement function, also has the function of multiple warning (as limiter is reported to the police, outrange warning and low-voltage warning etc.), data-interface, wireless transmission and automatic shutdown.
Accompanying drawing explanation
Fig. 1 is cut-away view of the present invention
Fig. 2 is electrical schematic diagram of the present invention
Fig. 3 is front plan view of the present invention
Detailed description of the invention
As shown in Figure 1, Fig. 1 is cut-away view of the present invention, and spanner is by square tenon (101), elastomer (102), main grid adapter (103), main grid fork (104), main grid sensor (105), limitting casing (106), secondary grid fork (107), secondary grid (108), secondary grid bracket (1 () 9), flexible cord (110), feature board (111).The part side of being tenon (101) that elastomer (102) and threaded fastener interlock, side's tenon (101) is connected by adapter (103) with main grid fork (104), and main grid sensor (105) is connected on main grid fork (104) by nut; Secondary grid fork (107) are fixed on elastomer (102), and main grid sensor (105) is relative with secondary grid (108) to be sandwiched between secondary grid bracket (109) and limitting casing (106).Secondary grid (108) are connected by flexible cord (110) with between feature board (111).In afterburner process, square tenon (101) and threaded fastener are fixed in the mode of self-locking, elastomer generation deformation is made in the reinforcing of handle place, make the main grid fork (104) be connected with elastomer (102) by main grid adapter (103) produce an angle relative to secondary grid fork (107), this angle through amplification in major and minor grid.With the radian that the major and minor grid relative motion of straight-line displacement Approximate Equivalent is formed.
As shown in Figure 2, Fig. 2 is electrical schematic diagram of the present invention.The straight-line displacement obtained by the relative movement equivalence of torque sensor (201) is formed the signal of telecommunication by absolute type capacitive displacement transducer (202) and is further converted to data signal, and the microprocessor (203) that this data signal is transferred on digital display assembly function plate by main grid by flexible cord carries out Digital Signal Processing.Microprocessor is the major control element of feature board, which define sound and light of alarm (204), function button (205), liquid crystal display display (206), external data memory (207), management data interface (208) and the wireless transport module (209) of control survey value.
As shown in Figure 2, the absolute appearance grid measuring technique of the capacitor grid transducer employing of spanner, retaining on the thin basis surveyed, add bigness scale, middle survey 2 code channels, the measurement of the capable thick precision of contraposition shift-in, medium accuracy, accurately precision respectively, achieve the absolute measurement of displacement, can accurate alignment sensor position, this provides possibility for error correction.The drive signal generator measured in integrated chip by special absolute appearance grid exports carse, medium and small wavelength signals, and these signals are exactly the displacement of measured position in respective wavelength by the negative time difference changed between positive zero crossing and the phase place zero point preset.After displacement when measured position in carse, medium and small wavelength is determined, measured position is also just determined thereupon.Measure integrated chip through special absolute appearance grid go out absolute position according to the waveshape of these three signals of telecommunication generations and be converted to data signal, this data signal is transferred to the microprocessor being positioned at feature board by flexible cord, show and define function and the sound and light alarm of each button.
As shown in Figure 2, the software correction of measurement is also completed by microprocessor.Dispatch from the factory in trimming process at spanner, first adopt the method for manual correction, make spanner precision reach required precision as far as possible, when manually correction cannot realize extra fine grade requirement, pass through software correction.Process is: manually calibrated analog error curve, obtain the fixed linear relation between measured value and standard value, be arranged in the reserved binding of the microprocessor on feature board option, this linear relationship is manually arranged binding option stored in this microprocessor, after capacitor grid transducer is by digital data transmission to microprocessor, automatically data are processed, on liquid crystal display, finally demonstrate data value after revising, realize the object that extra fine grade requires.
As shown in Figure 2, the transmission means of measurement result has wireless transmission, wire transmission two kinds.Both first can be stored by external memory storage, then be transferred on computer through data-interface, also can be transferred on computer by wireless module.Wherein, the working method of external memory storage is: staff is inconvenient to out of doors etc. to do data record place when using torque spanner to do surveying work, use exterior storage function can by data temporary storage, when needs recall data, by usb data interface and data wire storage data are sent on computer host computer and show.Store with extract the course of work be: will be measured by capacitor grid transducer and digital data transmission change to microprocessor, then output to external memory storage storage; Store effective measurement data by the memory be positioned on feature board, be then transferred on computer host computer by data-interface and show; Wireless transmission is the packet data signal that capacitor grid transducer is measured being converted to standard in maximum transmission distance by wireless transport module, has measured data and has been sent on computer by antenna and shows.
As shown in Figure 3, Fig. 3 is front plan view of the present invention, comprises elastomer (301), boosting-rod (302), digital display assembly (303), handle (304).Wherein digital display assembly there are LCDs (305), light warning (306), audible alarm (307), Conversion of measurement unit U button (308), the preset P+ of adding button (309), the preset P-of subtracting button (310), mode of operation that button M (311), data storage/wireless transmission button (312), switching on and shutting down/clearing button (313), usb data interface (314) are set.First, short in switching on and shutting down/clearing button (313), use mode of operation to arrange the selected mode of operation of button M (311) to be limited force mode, this pattern be apply to determine on threaded fastener moment values, and this value must be less than the maximum weighted value of threaded fastener.Adjust with the preset button (310) that subtracts the size setting moment values by the preset button (309) that adds, it is Nm, lbfft, lbfin or kgfcm that applying unit changes any selected moment unit of U button (311).Square tenon is inserted in securing member, exerts a force at handle (304) place.Force size is in the upper display in real time of LCDs (305), and when moment values reaches 80% of setting value, light warning (306) lamp lights, alert.Continuation is afterburning, and when moment values reaches setting value, light warning (306) lamp is bright, audible alarm (307) rings, and alert stops afterburning.If moment values exceedes setting value, light warning (306) lamp is bright and audible alarm (307) sound is rapid.Survey measured result and output to external memory storage storage by long data storage/wireless transmission button (312) of pressing, when needs recall data, by usb data interface (314) and data wire storage data are sent on computer host computer and show for follow-up.When spanner is within the maximum transmission distance of wireless transmission, also can be sent on computer by antenna and to show by short data storage/wireless transmission button (312) of pressing.
As shown in Figure 3, short in switching on and shutting down/clearing button (313), using mode of operation to arrange the selected mode of operation of button M (311) is tracing mode, comprise maximum tracking to follow the tracks of with minimum of a value, this pattern for apply moment values on threaded fastener, and the range of spanner must be less than the maximum weighted value of threaded fastener.Shortly enter maximum by one action mode setting key M (311) and follow the tracks of, the maximum on liquid crystal display only in display force process, when moment values reaches 80% of spanner range, light warning (306) lamp lights, alert.Continuation is afterburning, and when moment values reaches spanner range, light warning (306) lamp is bright, audible alarm (307) rings, and alert stops afterburning.If moment values exceedes spanner range, light warning (306) lamp is bright and audible alarm (307) sound is rapid.Short in switching on and shutting down/clearing button (313), use mode of operation that button M (311) is set and enter minimum of a value tracking, namely reverse maximum is followed the tracks of, liquid crystal display only shows the maximum in reverse force process, when moment values reaches 80% of spanner range, light warning (306) lamp lights, alert.Continuation is afterburning, and when moment values reaches spanner range, light warning (306) lamp is bright, audible alarm (307) rings, and alert stops afterburning.If moment values exceedes spanner range, light warning (306) lamp is bright and audible alarm (307) sound is rapid.Survey measured result and output to external memory storage storage by long data storage/wireless transmission button (312) of pressing, when needs recall data, by usb data interface (314) and data wire storage data are sent on computer host computer and show for follow-up.When spanner is within the maximum transmission distance of wireless transmission, also can be sent on computer by antenna and to show by short data storage/wireless transmission button (312) of pressing.
Claims (7)
1. a high accuracy capacitive grid type digital display torque spanner, it comprises: torque sensor, boosting-rod, digital display assembly, pinch bar.Wherein, torque amount is converted into the relative shift of capacitor grid transducer by torque sensor.There are three layer circuit boards in digital display assembly, are responsible for elastomer deformation quantity to be converted to data signal, and then in liquid crystal screen display, and define various function.Pinch bar sentences protective jacket parcel, prevents spanner to drop damages, impact use.
2. high accuracy capacitive grid type digital display torque spanner according to claim 1, it is characterized in that: described torque sensor comprises retaining element and moving element, the main grid immediately below described the moving element side of comprising tenon, elastomer, adapter, main grid fork, main grid spacer and spacer; Described retaining element is the secondary grid be positioned at immediately below main grid that secondary grid fork and end connect.Described main grid is coupled to described secondary grid in capacity coupled mode and can relative motion relative to secondary grid, elastomeric deformation quantity is delivered to main grid by main grid swing arm by described torque sensor exactly, and main grid produces relative position relative to secondary grid and moves and then export analog electrical energy signal.
3. the high accuracy capacitive grid type digital display torque spanner according to claim 1,2, is characterized in that: digital display component internal circuit board realizes all electric functions of spanner.The built-in three pieces of circuit boards of digital display assembly, are from bottom to top respectively capacitor grid transducer main grid, capacitor grid transducer secondary grid, feature board.Torsion is become the signal of telecommunication by capacitor grid transducer, and measures special chip by the absolute appearance grid be positioned on main grid circuit board and be processed into data signal and deliver to liquid crystal screen display.This data signal is transferred to the microprocessor be positioned on feature board simultaneously and processes, and realizes the various functions of spanner.
4. high accuracy capacitive grid type digital display torque spanner according to claim 1, it is characterized in that: what described displacement sensor of variable capacitor adopted is definitely hold grid metering system, compare relative type motor capacitor grid transducer and adopt the displacement measurement method carefully surveying number+pitch number, add bigness scale, middle survey 2 code channels, the measurement of the capable thick precision of contraposition shift-in, medium accuracy, accurately precision respectively, achieve the absolute measurement of displacement, can accurate alignment sensor position, this provides possibility for error correction.
5. the high accuracy capacitive grid type digital display torque spanner according to claim 2,3, adjustment it is characterized in that: when manually cannot reach 1 class precision, by using the microprocessor in digital display assembly on feature board to do software correction, display result is made to reach required precision.
6. high accuracy capacitive grid type digital display torque spanner according to claim 1, is characterized in that: in digital display assembly, feature board has external memory storage, can storage of measurement data for follow-up.In addition, measurement data also can convert the data signal that capacitor grid transducer exports to normal data bag by wireless data transmission module, is shown to computer by the antenna long-distance transmissions of spanner inside.
7. the high accuracy capacitive grid type digital display torque spanner according to claim 1,3, it is characterized in that: spanner is except the most basic torgue measurement function, also there is the function of multiple warning (as limiter is reported to the police, outrange warning and low-voltage warning etc.), data-interface, wireless transmission and automatic shutdown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310488680.1A CN104552120A (en) | 2013-10-18 | 2013-10-18 | High-precision capacitive-grating type digital-display torque spanner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310488680.1A CN104552120A (en) | 2013-10-18 | 2013-10-18 | High-precision capacitive-grating type digital-display torque spanner |
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| CN104552120A true CN104552120A (en) | 2015-04-29 |
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| CN201310488680.1A Pending CN104552120A (en) | 2013-10-18 | 2013-10-18 | High-precision capacitive-grating type digital-display torque spanner |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108145644A (en) * | 2017-12-25 | 2018-06-12 | 杭州沈大侠装饰设计工程有限公司 | The spanner and the method using the spanner trip bolt that torsion transfinites can be warned |
| CN108890568A (en) * | 2018-09-18 | 2018-11-27 | 深圳市深丝微智能技术有限公司 | A kind of Intelligent servo electric screwdriver |
| CN109689305A (en) * | 2016-09-13 | 2019-04-26 | 米沃奇电动工具公司 | Dynamical type ratchet-type torque wrench |
| CN110861025A (en) * | 2019-11-21 | 2020-03-06 | 三峡大学 | A capacitive grid sensor torque wrench |
| WO2022027219A1 (en) * | 2020-08-04 | 2022-02-10 | Apex Brands, Inc. | Torque wrench with improved torque setting adjustment |
| US11453105B2 (en) | 2016-09-13 | 2022-09-27 | Milwaukee Electric Tool Corporation | Powered ratcheting torque wrench |
| US11766770B2 (en) | 2016-09-13 | 2023-09-26 | Milwaukee Electric Tool Corporation | Powered ratcheting torque wrench |
-
2013
- 2013-10-18 CN CN201310488680.1A patent/CN104552120A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109689305A (en) * | 2016-09-13 | 2019-04-26 | 米沃奇电动工具公司 | Dynamical type ratchet-type torque wrench |
| US11453105B2 (en) | 2016-09-13 | 2022-09-27 | Milwaukee Electric Tool Corporation | Powered ratcheting torque wrench |
| US11766770B2 (en) | 2016-09-13 | 2023-09-26 | Milwaukee Electric Tool Corporation | Powered ratcheting torque wrench |
| US12097596B2 (en) | 2016-09-13 | 2024-09-24 | Milwaukee Electric Tool Corporation | Powered ratcheting torque wrench |
| CN108145644A (en) * | 2017-12-25 | 2018-06-12 | 杭州沈大侠装饰设计工程有限公司 | The spanner and the method using the spanner trip bolt that torsion transfinites can be warned |
| CN108890568A (en) * | 2018-09-18 | 2018-11-27 | 深圳市深丝微智能技术有限公司 | A kind of Intelligent servo electric screwdriver |
| CN110861025A (en) * | 2019-11-21 | 2020-03-06 | 三峡大学 | A capacitive grid sensor torque wrench |
| CN110861025B (en) * | 2019-11-21 | 2021-08-31 | 三峡大学 | A capacitive grid sensor torque wrench |
| CN113547477A (en) * | 2019-11-21 | 2021-10-26 | 三峡大学 | Torque detection method |
| CN113547477B (en) * | 2019-11-21 | 2022-03-08 | 三峡大学 | Torque detection method |
| WO2022027219A1 (en) * | 2020-08-04 | 2022-02-10 | Apex Brands, Inc. | Torque wrench with improved torque setting adjustment |
| US11701762B2 (en) | 2020-08-04 | 2023-07-18 | Apex Brands, Inc. | Torque wrench with improved torque setting adjustment |
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Application publication date: 20150429 |