CN103267869A - Double-headed high precision velocity sensor and working method - Google Patents
Double-headed high precision velocity sensor and working method Download PDFInfo
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- CN103267869A CN103267869A CN2013101537391A CN201310153739A CN103267869A CN 103267869 A CN103267869 A CN 103267869A CN 2013101537391 A CN2013101537391 A CN 2013101537391A CN 201310153739 A CN201310153739 A CN 201310153739A CN 103267869 A CN103267869 A CN 103267869A
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Abstract
Provided are a double-headed high precision velocity sensor and a working method. A motor velocity sensor serving as an important element for motor control has been already applied to various control occasions widely and is the important element for achieving closed-loop control and precision control of a motor. The double-headed high precision velocity sensor structurally comprises a signal inductive head body (1), wherein a first hall detecting element (2) and a second hall detecting element (3) are installed in the signal inductive head body, the signal inductive head body is connected with a signal detector (4) with an oscillating circuit, the signal detector is connected with a double-signal memorizer (5) with a signal frequency multiplication calculating circuit, the double-signal memorizer is connected with a signal computational analysis circuit (6) with a signal output circuit, and the first hall detecting element and the second hall detecting element are connected with a central processing circuit system (7) simultaneously. The double-headed high precision velocity sensor is used in severe environmental conditions of oil fields, mines and the like.
Description
Technical field
The present invention relates to a kind of double head type high precision velocity sensor and method of work
Background technology
Motor speed sensor has been widely used in various control occasions as the critical elements of Electric Machine Control, is the critical elements that realizes motor closed-loop control and precision control.For improving electric efficiency, realize that the servo characteristic (operation as required) of motor plays crucial effects.Universal motor speed sensor mainly is divided into following several types: photoelectric encoder, magnetic coder, rotary transformer.Universal sensor is had relatively high expectations to installation accuracy owing to it, and shock resistance, vibration ability are poor, in installation and use, very easily damage, price is higher, therefore structure and degree of protection to motor itself are had relatively high expectations, and can't use in a large number in being similar to field, rugged surroundings such as walking-beam pumping unit.The employed motor angular displacement sensor of Suo Fei company also belongs to a kind of of motor speed sensor, is installation and environment for use requirement in conjunction with the scene, oil field, is designed and developed forming voluntarily by Suo Fei company,
Hall element as a kind of digital sensor with its good, advantage such as the signal antijamming capability is strong simple in structure, easy for installation, environment resistant, be widely used on the various electromechanical equipments as feedback element, the cycle of signal or frequency have reflected the velocity variations of motor.But because the sensing range of Hall element has limited the minimum diameter of gear, add the restriction of motor size, the number of teeth of therefore feeding back disk can not be too many, and installation accuracy is not very high, this has just fundamentally determined that the sensor accuracy of Hall form is low, and signal quality is coarse.The output frequency of motor this class sensing device when slow running can be very not high, motor speed stable bad, cause the dutycycle of square-wave signal to change at any time, frequency and the cycle differentiation of adjacent signals excessive (the pulse signal number difference that namely detects in the unit interval is too big), if adopt direct time detecting method or frequency detecting method will cause very big error, can't reach the accurate judgement to motor operating state.In addition, because simple periodic hall signal only can feed back rotating speed of motor, and can't judge and the sense of rotation of motor make the occasion of its use that significant limitation arranged again.
Chinese patent CN201020124239.7 discloses the folded fly down gear positioning device of a kind of automatic mahjong-playing machine, and the folded fly down gear positioning device of automatic mahjong-playing machine can't be carried out input in order to position to gear
Summary of the invention
The purpose of this invention is to provide and a kind ofly have characteristics such as anti-HI high impact, high vibration, anti-dust, high-low temperature resistant impact, and installation accuracy requires lowly, debugging makes things convenient for, cheap double head type high precision velocity sensor and method of work.
Described purpose is achieved by the following scheme:
A kind of double head type high precision velocity sensor, its composition comprises: an induction of signal body, a hall detection component and No. two hall detection components of having signal detection amplifying circuit are housed in the described induction of signal body, a described hall detection component is connected the signal detector that has oscillatory circuit simultaneously with described No. two hall detection components, described signal detector connects the dual signal storer that has the signal frequency multiplication counting circuit, and described dual signal storer connects the calculated signals analysis circuit that has signal output apparatus; A described hall detection component is connected the central processing circuit system simultaneously with described No. two hall detection components, and a described hall detection component and described No. two hall detection components are installed on the same circumference, differs 90 degree electrical angles each other and installs.
Described double head type high precision velocity sensor, a described induction of signal body are installed in profile of tooth feedback disk, and described profile of tooth feedback disk is installed on the motor shaft, and a described induction of signal body connects signal cable.
Described double head type high precision velocity sensor, hall detection component comprises Hall circuit, described Hall circuit connects No. one and adjusts electric capacity, described Hall circuit connects signal amplifier, described signal amplifier has a pin, No. two pins and No. three pins, described No. three pins connect described Hall circuit, and a described pin connects described No. two pins, and a described pin connects described calculated signals analysis circuit.
Described double head type high precision velocity sensor, described oscillatory circuit comprises the crystal oscillator oscillator, described crystal oscillator oscillator connects No. two and adjusts electric capacity and adjust electric capacity No. three, described No. two adjustment electric capacity connect described No. three and adjust electric capacity, described crystal oscillator oscillator connects described calculated signals analysis circuit, and described calculated signals analysis circuit connects described signal output apparatus.
A kind of method of work of double head type high precision velocity sensor, detect at hall detection component and on the basis of a pulse signal signal is divided into rising edge and negative edge detects respectively, with rising edge mistiming of detected adjacent periods signal as a signal period t1, and outwards send the pulse signal of duration t1 such as; With negative edge mistiming of detected adjacent periods signal as another signal period t2, and outwards send the pulse signal of duration t2 such as; Adopt the hall detection component that differs 90 degree electrical angles on a hall detection component, two spaces of No. two hall detection components to detect rising edge and the negative edge of two pulse signals respectively, then signal is handled by synchronous, on this basis signal is carried out process of frequency multiplication again and install central processing element additional in signal deteching circuit, the signal stabilization cycle that calculates according to frequency multiplier circuit adopts method of interpolation that the feature of next signal and signal pests occurrence rule are carried out trending and calculates, and dopes cycle and frequency that will detected signal and exports as actual signal.
Described double head type high precision velocity sensor, profile of tooth feedback disk is made by permeability magnetic material, and its circumference has detent projection, the interval 2-5mm of tooth and tooth, its axial width is not less than 10mm; Profile of tooth feedback disk is installed on the motor shaft, and rotates synchronously with motor shaft; The induction of signal head is installed on the electric motor end cap and near profile of tooth feedback disk and installs.
The invention has the beneficial effects as follows:
The present invention carries out twice detection and outwards exports two subpulses that comprise pulse duration actual signal in a signal detection cycle, and the detection frequency is doubled, and signal accuracy also doubles.
The present invention adopts the hall detection component that differs 90 degree electrical angles on a hall detection component, two spaces of No. two hall detection components to detect rising edge and the negative edge of two pulse signals respectively, then signal is handled by synchronous, then be equivalent to make the precision of signal to bring up to original 4 times.
The present invention's central processing element in motor operation course constantly will utilize signal characteristic that interpolation calculation comes out and true detected signal characteristic to compare and constantly revise the interpolation calculation result according to comparative result, make signal that institute calculates and dope more close to actual signal.
The present invention is owing to signal process physics and mathematical frequency multiplication several times, and the quantity in the unit interval increases, and precision improves, and the deviation of while individual signals also reduces greatly to the influence degree of overall precision.
The present invention utilizes mathematical method to remedy sensor because the low excessively problem of precision that structural defective causes can be simplified the physical construction of high-precision sensor greatly, reduces the difficulty of its production and processing, improves sensor to the adaptedness of working environment.In oil, petrochemical industry, colliery and mining machinery field market outlook are widely arranged.
Description of drawings
Accompanying drawing 1 is theory diagram of the present invention.
Accompanying drawing 2 is that accompanying drawing 1 is installed in the synoptic diagram on the motor.
Accompanying drawing 3 is structural representations of induction of signal head in the accompanying drawing 1.
Accompanying drawing 4 is circuit diagrams of accompanying drawing 1.
Embodiment
Elaborate the preferred embodiment of the present invention below in conjunction with accompanying drawing.
Embodiment one
A kind of double head type high precision velocity sensor, shown in accompanying drawing 1, accompanying drawing 3, its composition comprises: an induction of signal body 1, a hall detection component 2 and No. two hall detection components 3 of having signal detection amplifying circuit are housed in the described induction of signal body, a described hall detection component is connected the signal detector 4 that has oscillatory circuit simultaneously with described No. two hall detection components, described signal detector connects the dual signal storer 5 that has the signal frequency multiplication counting circuit, and described dual signal storer connects the calculated signals analysis circuit 6 that has signal output apparatus; A described hall detection component is connected central processing circuit system 7 simultaneously with described No. two hall detection components, and a described hall detection component and described No. two hall detection components are installed on the same circumference, differs 90 degree electrical angles each other and installs.
The spatial arrangement of two Hall elements is on same circumference, differs 90 degree electrical angles each other.
Signal detection amplifying circuit is formed by adjusting resistance and signal amplifier, the square-wave signal of two Hall elements collecting is adjusted and is amplified, and sends special chip (signal analysis counting circuit) then to.
Vibration (clock) circuit is made up of quartz oscillation body and filter capacitor, for entire circuit and dsp chip provide the stable clock signal.
Signal frequency multiplication counting circuit (dsp system) is made up of signal storage and high-speed arithmetic and logic unit, and the square-wave signal that receives is sampled and analytical calculation by the plug-in method.
Signal output apparatus is made up of special-purpose communication module, and the signal stabilization feature (standard signal) that the computational analysis of calculated signals analysis circuit goes out is exported to master system (frequency converter etc.).
Embodiment two
The difference of present embodiment and embodiment one is, as shown in Figure 2, described double head type high precision velocity sensor, a described induction of signal body connects profile of tooth feedback disk 8, described profile of tooth feedback disk is installed on the motor shaft 9, described motor shaft is installed in motor 10, and described motor has electric motor end cap 11, and a described induction of signal body connects signal cable 12.
Described double head type high precision velocity sensor, profile of tooth feedback disk is made by permeability magnetic material, and its circumference has detent projection, the interval 2-5mm of tooth and tooth, its axial width is not less than 10mm; Profile of tooth feedback disk is installed on the motor shaft, and rotates synchronously with motor shaft; The induction of signal head is installed on the electric motor end cap and near profile of tooth feedback disk and installs.
Embodiment three
The difference of present embodiment and embodiment one is, as shown in Figure 4, described double head type high precision velocity sensor, hall detection component comprises Hall circuit, and described Hall circuit connects No. one and adjusts electric capacity, and described Hall circuit connects signal amplifier, described signal amplifier has a pin, No. two pins and No. three pins, described No. three pins connect described Hall circuit, and a described pin connects described No. two pins, and a described pin connects described calculated signals analysis circuit.
Embodiment four
The difference of present embodiment and embodiment one is, as shown in Figure 4, described double head type high precision velocity sensor, described oscillatory circuit comprises the crystal oscillator oscillator, described crystal oscillator oscillator connects No. two and adjusts electric capacity and adjust electric capacity No. three, described No. two adjustment electric capacity connect described No. three and adjust electric capacity, and described crystal oscillator oscillator connects described calculated signals analysis circuit, and described calculated signals analysis circuit connects described signal output apparatus 13.
Embodiment five
A kind of method of work of double head type high precision velocity sensor, it is characterized in that on hall detection component detects the basis of a pulse signal, signal being divided into rising edge and negative edge detects respectively, with rising edge mistiming of detected adjacent periods signal as a signal period t1, and outwards send the pulse signal of duration t1 such as; With negative edge mistiming of detected adjacent periods signal as another signal period t2, and outwards send the pulse signal of duration t2 such as; (the normal signal detection mode is: detect rising edge and negative edge in the signal period, and directly it is exported as a pulse signal, be recorded in the pulse number of exporting in the unit interval.If signal dutyfactor be not equal to 0.5 could reflect true speed conditions) adopt a hall detection component, the hall detection component that differs 90 degree electrical angles on two spaces of No. two hall detection components detects rising edge and the negative edge of two pulse signals respectively, then signal is handled by synchronous, on this basis signal is carried out process of frequency multiplication again and install central processing element additional in signal deteching circuit, the signal stabilization cycle that calculates according to frequency multiplier circuit adopts method of interpolation that the feature of next signal and signal pests occurrence rule are carried out trending and calculates, and dopes cycle and frequency that will detected signal and exports as actual signal.
Embodiment six
The difference of present embodiment and embodiment two is, described double head type high precision velocity sensor, and profile of tooth feedback disk is made by permeability magnetic material, and its circumference has detent projection, the interval 2 of tooth and tooth or 3 or 4 or 5mm.
Present embodiment is the protection domain that the exemplary illustration of this patent is not limited it; those skilled in the art can also carry out the part to it and change; the short of spiritual essence that exceeds this patent all is considered as the replacement that is equal to this patent, all within the protection domain of this patent
Claims (6)
1. double head type high precision velocity sensor, its composition comprises: an induction of signal body, it is characterized in that being equipped with in the described induction of signal body hall detection component and No. two hall detection components of having signal detection amplifying circuit, a described hall detection component is connected the signal detector that has oscillatory circuit simultaneously with described No. two hall detection components, described signal detector connects the dual signal storer that has the signal frequency multiplication counting circuit, and described dual signal storer connects the calculated signals analysis circuit that has signal output apparatus; A described hall detection component is connected the central processing circuit system simultaneously with described No. two hall detection components, and a described hall detection component and described No. two hall detection components are installed on the same circumference, differs 90 degree electrical angles each other and installs.
2. double head type high precision velocity sensor according to claim 1 is characterized in that a described induction of signal body is installed in profile of tooth feedback disk, and described profile of tooth feedback disk is installed on the motor shaft, and a described induction of signal body connects signal cable.
3. double head type high precision velocity sensor according to claim 1 is characterized in that
Hall detection component comprises Hall circuit, described Hall circuit connects No. one and adjusts electric capacity, described Hall circuit connects signal amplifier, described signal amplifier has a pin, No. two pins and No. three pins, described No. three pins connect described Hall circuit, a described pin connects described No. two pins, and a described pin connects described calculated signals analysis circuit.
4. double head type high precision velocity sensor according to claim 1, it is characterized in that described oscillatory circuit comprises the crystal oscillator oscillator, described crystal oscillator oscillator connects No. two and adjusts electric capacity and adjust electric capacity No. three, described No. two adjustment electric capacity connect described No. three and adjust electric capacity, described crystal oscillator oscillator connects described calculated signals analysis circuit, and described calculated signals analysis circuit connects described signal output apparatus.
5. the method for work of a double head type high precision velocity sensor, it is characterized in that on hall detection component detects the basis of a pulse signal, signal being divided into rising edge and negative edge detects respectively, with rising edge mistiming of detected adjacent periods signal as a signal period t1, and outwards send the pulse signal of duration t1 such as; With negative edge mistiming of detected adjacent periods signal as another signal period t2, and outwards send the pulse signal of duration t2 such as; Adopt the hall detection component that differs 90 degree electrical angles on a hall detection component, two spaces of No. two hall detection components to detect rising edge and the negative edge of two pulse signals respectively, then signal is handled by synchronous, on this basis signal is carried out process of frequency multiplication again and install central processing element additional in signal deteching circuit, the signal stabilization cycle that calculates according to frequency multiplier circuit adopts method of interpolation that the feature of next signal and signal pests occurrence rule are carried out trending and calculates, and dopes cycle and frequency that will detected signal and exports as actual signal.
6. double head type high precision velocity sensor according to claim 2 is characterized in that profile of tooth feedback disk made by permeability magnetic material, and its circumference has detent projection, the interval 2-5mm of tooth and tooth, and its axial width is not less than 10mm; Profile of tooth feedback disk is installed on the motor shaft, and rotates synchronously with motor shaft; The induction of signal head is installed on the electric motor end cap and near profile of tooth feedback disk and installs.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929017A (en) * | 2013-10-28 | 2014-07-16 | 芜湖莫森泰克汽车科技有限公司 | Skylight motor and rotating speed detecting method for skylight motor |
| CN105203794A (en) * | 2015-09-21 | 2015-12-30 | 华自科技股份有限公司 | Electric generator rotation speed measuring system and method |
| CN111381071A (en) * | 2018-12-27 | 2020-07-07 | 北京奇虎科技有限公司 | Speed abnormity detection device and method based on Hall sensor |
| CN112450760A (en) * | 2019-09-09 | 2021-03-09 | 广东美的生活电器制造有限公司 | Motor speed measuring structure, motor, food processor and motor speed measuring method |
| CN113325192A (en) * | 2021-05-28 | 2021-08-31 | 湖南湘依铁路机车电器股份有限公司 | Frequency doubling method for shaft end Hall speed sensor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067740A (en) * | 1991-05-22 | 1993-01-06 | 三菱电机株式会社 | Apparatus for checking lift speed |
| CN101762716A (en) * | 2009-11-27 | 2010-06-30 | 哈尔滨电机厂有限责任公司 | Fluted disc speed measuring device for water turbine generator |
| CN202285021U (en) * | 2011-11-07 | 2012-06-27 | 苏州市职业大学 | Instrument for measuring wheel speed |
| CN102830247A (en) * | 2012-09-11 | 2012-12-19 | 深圳市开立科技有限公司 | Method and device for detecting rotation state of rotation part |
| CN203178299U (en) * | 2013-04-28 | 2013-09-04 | 张敏 | Double-head high-precision speed sensor |
-
2013
- 2013-04-28 CN CN2013101537391A patent/CN103267869A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067740A (en) * | 1991-05-22 | 1993-01-06 | 三菱电机株式会社 | Apparatus for checking lift speed |
| CN101762716A (en) * | 2009-11-27 | 2010-06-30 | 哈尔滨电机厂有限责任公司 | Fluted disc speed measuring device for water turbine generator |
| CN202285021U (en) * | 2011-11-07 | 2012-06-27 | 苏州市职业大学 | Instrument for measuring wheel speed |
| CN102830247A (en) * | 2012-09-11 | 2012-12-19 | 深圳市开立科技有限公司 | Method and device for detecting rotation state of rotation part |
| CN203178299U (en) * | 2013-04-28 | 2013-09-04 | 张敏 | Double-head high-precision speed sensor |
Non-Patent Citations (1)
| Title |
|---|
| 徐永向等: "基于单霍尔传感器的PMSM位置检测方法", 《哈尔滨工业大学学报》, vol. 40, no. 11, 30 November 2008 (2008-11-30), pages 1769 - 1772 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929017A (en) * | 2013-10-28 | 2014-07-16 | 芜湖莫森泰克汽车科技有限公司 | Skylight motor and rotating speed detecting method for skylight motor |
| CN105203794A (en) * | 2015-09-21 | 2015-12-30 | 华自科技股份有限公司 | Electric generator rotation speed measuring system and method |
| CN111381071A (en) * | 2018-12-27 | 2020-07-07 | 北京奇虎科技有限公司 | Speed abnormity detection device and method based on Hall sensor |
| CN112450760A (en) * | 2019-09-09 | 2021-03-09 | 广东美的生活电器制造有限公司 | Motor speed measuring structure, motor, food processor and motor speed measuring method |
| CN113325192A (en) * | 2021-05-28 | 2021-08-31 | 湖南湘依铁路机车电器股份有限公司 | Frequency doubling method for shaft end Hall speed sensor |
| CN113325192B (en) * | 2021-05-28 | 2024-01-16 | 湖南湘依铁路机车电器股份有限公司 | Frequency multiplication method for shaft end Hall speed sensor |
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Application publication date: 20130828 |