CN201302576Y - Non-contact type speed measuring device for underwater brushed direct current motor - Google Patents
Non-contact type speed measuring device for underwater brushed direct current motor Download PDFInfo
- Publication number
- CN201302576Y CN201302576Y CNU2008202251517U CN200820225151U CN201302576Y CN 201302576 Y CN201302576 Y CN 201302576Y CN U2008202251517 U CNU2008202251517 U CN U2008202251517U CN 200820225151 U CN200820225151 U CN 200820225151U CN 201302576 Y CN201302576 Y CN 201302576Y
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- motor
- measuring device
- speed measuring
- direct current
- contact type
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Abstract
The utility model relates to a non-contact type speed measuring device for underwater brushed direct current motor, which belongs to the field of measuring the rotation speed of a direct current motor. The device comprises a forcipated gauge head or a Hall current sensor, and a control panel which is connected with the device, wherein a digital display is arranged on the control panel, the forcipated gauge head or the Hall current sensor is connected with the digital display through a wave form processing circuit, a communication interface is arranged on the control panel, and the speed measuring device is connected with a host computer through the communication interface. The device can measure the value of the rotation speed of the motor and the value of the working current of the motor under the conditions that the motor and executing mechanism machinery are not changed and the device is completely insulated with an original motor electric system, realizes the data alternation with the host machine, and conveniently and simply builds a motor closed-loop drive control system.
Description
Technical field
The utility model relates to a kind of dc motor speed measurement mechanism, specifically is used for having the speed measuring device of brush direct current generator under water.
Background technology
Have the brush direct current generator cheap, the control speed governing is simple, and range of application is quite extensive, and needs to know rotating speed of motor information in many application scenarios and repairing maintenance.Test the speed equipment or velocity metre of conventional motors generally adopts senser elements such as tech-generator, Hall element, photoelectric encoder, these devices must be installed to a part of equipment on the motor shaft, by the motor shaft driven rotary, during rotation rotary speed information is sent near the motor shaft another part fixedly on the collecting device by modes such as magnetic field, light, promptly speed measuring device need be installed in addition on motor.This method is the output power of additive decrementation motor both, has increased installation, the debugging complexity of equipment again, increased substantially system cost and maintenance, maintenance cost simultaneously, and this method can't be used in the equipment of some mechanical hook-up moulding.
Subsea equipment such as underwater robot (being called for short ROV), autonomous type underwater robot (being called for short AUV), boats and ships, naval vessels, deep water oilrig etc.; to sealing, the voltage endurance capability of parts require very strict under water; require high to These parameters when particularly use in deep-sea or full marine site; and have brush direct current generator, compact conformation little with volume, low to the installation environment requirement, be easy to realize that sealing and high advantage such as withstand voltage have irreplaceable advantage in above-mentioned application, so extensively adopt different capacity in the subsea equipment the brush direct current generator is arranged as power drill/driver.Most subsea equipments need to know motor speed information in application, for example need among ROV, the AUV according to revolution speed calculating thrust, realize location and the controlled motion of ROV.If in above-mentioned motor outside is that speed measuring device is installed in the topworks, will be quite difficulty even can't realize; If speed measuring device is installed at motor internal, certainly will cause motor volume to increase, complex structure, and in order to satisfy the then higher manufacture craft of needs of corresponding sealing, requirement of withstand voltage, even to pay quite expensive cost.In addition, must use motor speed information in present most R﹠D process to realize closed-loop control, and the research staff is a motor device of buying finished product, existing submersible machine seldom is with inner speed detector, the submersible machine price is rather stiff that has monitoring device, and installation, maintenance cost height; Outside sensor installation or searching motor manufacturer customization motor need be paid more time, energy and expense equally.
Summary of the invention
The purpose of this utility model has been to propose a kind of non-contact type speed measuring device that the brush direct current generator is arranged that is applicable under water, under the situation that does not change motor and topworks's plant equipment and isolate fully with the original motor electrical system, can measure motor speed value, motor working current value, and realized and the data interaction of host computer, made up motor closed loop driving control system convenient and simplely.
The utility model is to adopt following technical scheme to realize: a kind of non-contact type speed measuring device that is used for having the brush direct current generator under water, this device comprises pincerlike gauge outfit or Hall current sensor and connected control panel, control panel is provided with digital indicator, pincerlike gauge outfit or Hall current sensor are connected with digital indicator by waveform processing circuit, control panel is provided with communication interface, and speed measuring device is connected with host computer by communication interface.
In the utility model, described communication interface can adopt RS232 interface, SPI interface, USB interface, CAN interface or Ethernet interface.Described host computer can be industrial computer, PC, single-chip microcomputer or serial ports HUB.
The current waveform of rotor winding in the time of can recording the motor operation by pincerlike gauge outfit or Hall current sensor, current waveform is divided into two-way: the first via is taken out commutation information through bandwidth-limited circuit, amplifying circuit, low-pass filter circuit, zero cross detection circuit, this information is delivered to single-chip microcomputer trigger external interrupt, calculate the motor speed value; The second the tunnel through the circuit that takes absolute value, the circuit of averaging taking-up current information, delivers to single-chip microcomputer, goes out current value through the AD conversion Calculation, and motor speed value and motor working current value can be read by the digital indicator on the control panel.
The beneficial effects of the utility model are: split-core type meter head or Hall current sensor are made according to hall principle, can reflect in real time that the electric current that passes in the sensor conductor changes, and gather shape information, simultaneously and pass through electrical isolation between conductor.Motor speed and motor working current value can be measured in the center that will have the single power lead of brush direct current generator to put into pincerlike gauge outfit or Hall current sensor during use, realized heed contacted measure, promptly need not change original electromechanics structure and isolate fully with the original motor electrical system; Secondly, can set bound and pre-value rotating speed by this speed measuring device, when tachometer value exceeds the upper limit or be lower than lower limit or equal pre-value, provide audible alarm and trigger built-in relay, make the electric equipment of receiving on this device, as actions such as contactor or gauge tap, play protection or control action; In addition, this speed measuring device can be uploaded to host computer with the parameter that records by RS232 or other forms of interface circuit, host computer also can be provided with speed measuring device by interface circuit simultaneously, the research staff can utilize this speed measuring device to realize the closed-loop control of motor simply, easily, reduce the research and development expense, shorten the research and development time.Because subsea equipment all has power supply, placement devices negative pressure cabin, this device can be placed in the negative pressure cabin, need not the waterproof pressure-resistant treatments, therefore the utility model is simple in structure, manufacturing cost and use cost is low, need not to change direct current generator and execution architecture plant equipment, and is easy to use.
Description of drawings
Fig. 1 is a front view of the present utility model;
Fig. 2 is a rear view of the present utility model;
Fig. 3 is the partial enlarged drawing of RS232 interface among Fig. 2;
Fig. 4 is an electrical structure synoptic diagram of the present utility model.
Embodiment
As shown in Figure 1, this speed measuring device comprises pincerlike gauge outfit 1 and control panel 2, being connected pincerlike gauge outfit 1 by binding clip trigger 3 between pincerlike gauge outfit 1 and the control panel 2 is installed on the control panel 2, can open or occluding forceps type gauge outfit 1 by binding clip trigger 3, the front of control panel 2 is provided with liquid crystal digital display 3, switching on and shutting down button 5, Hold button 7, Alt button 6, toggle switch 8, and the back side of control panel 2 is provided with hummer 9, alarm out splice going splice 10 and RS232 interface 11.This device is communicated by letter with host computer by RS232 interface 11.Pincerlike gauge outfit 1 is made according to hall principle, when motor moves, the rotor winding obtains electric current by commutator, commutation each time, the electric current that flows through the commutation winding all can take place from having to do not having or the process of growing out of nothing, because the rotor winding is an inductive load, the electric current variation is reflected on the motor power supply and becomes ripple current, by detecting commutation ripple number in the unit interval,, just can obtain unit interval motor revolution again divided by motor commutation tank number.
As shown in Figure 4, record the current waveform of motor operation by the split-core type meter head after, current waveform is divided into two-way: the first via is taken out commutation information through bandwidth-limited circuit, amplifying circuit, low-pass filter circuit, zero cross detection circuit, this information is delivered to single-chip microcomputer trigger external interrupt, calculate the motor speed value; The second the tunnel through the circuit that takes absolute value, the circuit of averaging taking-up current information, delivers to single-chip microcomputer, calculates current value through AD converter, can read corresponding rotating speeds value or current value by liquid crystal digital display.Obtaining and handle by mimic channel of waveform realizes.
The concrete using method of this speed measuring device is as described below:
1, surveys rotating speed: turn on the power switch 6, connect load, there is brush dc motor power line vertically to pass through the center of pincerlike gauge outfit 1 with single, pin binding clip trigger 3 and open pincerlike gauge outfit 1, make pincerlike gauge outfit 1 gripping conductor to be measured, decontrol trigger 3 then lentamente, closed fully until pincerlike gauge outfit 1, and guarantee conductor to be measured by the central authorities of gripping at binding clip 1, if do not place the binding clip center can produce additive error; Then, be provided with brush DC motor commutator groove number by toggle switch 8, these data can be obtained from motor nameplate or instructions; After device 3 registrations to be shown tend towards stability, press Hold button 7, read motor speed, the unit of tachometer value is rev/min.
2, survey electric current: turn on the power switch 5; Press Alt button 6 and connect load, electric current plain conductor to be measured is vertically passed through the center of pincerlike gauge outfit 1 according to the step of surveying in the rotating speed; By the dial-up keyboard current range is set; After device 4 registrations to be shown tend towards stability, press Hold button 7, read current value to be measured, current unit is an ampere.
3, warning function: long press Hold button 7, treat that entering warning behind hummer 9 sound is provided with pattern, can set a upper limit under this pattern, a lower limit, seven pre-values can utilize the dial-up keyboard that it is set; After configuring, send alarm sound when rotating speed surpasses the upper limit or is lower than lower limit or equals any one pre-value, the 1-2 of the out splice going splice of reporting to the police simultaneously disconnects, the 2-3 closure, and the warning output capacity is 1A@400V AC.Set that the back is long press Hold button 7, treated that withdrawing from warning behind hummer 9 sound is provided with pattern.
4, data transmission: connect pincerlike velocity metre RS232 interface 11 and host computer RS232 interface with the serial ports direct-through line, host computer can be industrial computer, PC, single-chip microcomputer or serial ports HUB.Use (3) three ports of GND (1), RX (2), TX of RS232 to receive, send data.
The utility model measuring principle is by measuring ripple frequency and realizing that through certain calculation frequency measurement and data operation are all finished by single-chip microcomputer.Wherein frequency measurement can realize by the following method: the low side frequency adopts cycle frequency measurement method, and hereinafter to be referred as periodic method, intermediate frequency adopts multicycle frequency measurement method, and hereinafter to be referred as the multicycle method, high-end frequency adopts the direct frequency measurement method, hereinafter to be referred as frequency method.Periodic method is applicable to low frequency signal, adopts a Timer in the single-chip microcomputer, with the standard machine cycle in the single-chip microcomputer as standard time-base signal T
sThe cycle of measured signal is as the signal gate, by sequence check switch to the time base count n
x, so the measured signal cycle be T
x=n
x* T
sThe multicycle method is applicable to intermediate-freuqncy signal, at first, provides the gate opening signal by single-chip microcomputer or corresponding control circuit, and this hour counter does not begin counting, but the rising edge of measured signal by the time just really begins counting when arriving.Then, the two-stage counter is respectively to measured signal and standard signal counting, after single-chip microcomputer provides the closing gate signal, counter do not stop immediately counting but by the time measured signal rising edge moment of coming just really finish counting, thereby finish the one-shot measurement process.If the count value of measured signal is N
x, the count value of time-base signal is N
x, the frequency of time-base signal is f
o, then the frequency of measured signal is: f
x=N
x* f
o/ N
oFrequency method is applicable to high-frequency signal, utilizes two Timer in the single-chip microcomputer, and one provides standard gate signal T as timer
z, another as counter to f
xChange frequency directly count N
x, f
x=N
x/ T
zIf the ripple frequency that records is f, it is N that brush direct current trough number is arranged
mThen motor speed S can have following formula to provide: S=f/N
mThe calculating process of above formula is all realized by floating-point operation in single-chip microcomputer.
Described pincerlike gauge outfit can be replaced by Hall current sensor, during use, have brush dc motor power line to put into Hall current sensor can to gather corresponding shape information with single, control panel can be designed to other appearance forrns according to concrete need of work; Pincerlike in addition gauge outfit pincerlike meter also can adopt other multiple interfaces such as SPI, CAN, USB, Ethernet to communicate by letter with host computer.
Claims (5)
1, a kind of non-contact type speed measuring device that is used for having the brush direct current generator under water, it is characterized in that: this device comprises pincerlike gauge outfit or Hall current sensor and connected control panel, control panel is provided with digital indicator, pincerlike gauge outfit or Hall current sensor are connected with digital indicator by waveform processing circuit, control panel is provided with communication interface, and speed measuring device is connected with host computer by communication interface.
2, the non-contact type speed measuring device that is used for having the brush direct current generator under water according to claim 1, it is characterized in that: described communication interface adopts RS232 interface, SPI interface, USB interface, CAN interface or Ethernet interface.
3, the non-contact type speed measuring device that is used for having the brush direct current generator under water according to claim 1, it is characterized in that: described host computer adopts industrial computer, PC, single-chip microcomputer or serial ports HUB.
4, the non-contact type speed measuring device that is used for having the brush direct current generator under water according to claim 1, it is characterized in that: described waveform processing circuit comprises bandwidth-limited circuit, amplifying circuit, low-pass filter circuit, zero cross detection circuit, and the input single-chip microcomputer triggers external interrupt.
5, the non-contact type speed measuring device that is used for having the brush direct current generator under water according to claim 1, it is characterized in that: described waveform processing circuit comprises the circuit that takes absolute value, the circuit of averaging, the AD converter of input single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202251517U CN201302576Y (en) | 2008-12-06 | 2008-12-06 | Non-contact type speed measuring device for underwater brushed direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202251517U CN201302576Y (en) | 2008-12-06 | 2008-12-06 | Non-contact type speed measuring device for underwater brushed direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201302576Y true CN201302576Y (en) | 2009-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202251517U Expired - Fee Related CN201302576Y (en) | 2008-12-06 | 2008-12-06 | Non-contact type speed measuring device for underwater brushed direct current motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735869A (en) * | 2012-06-25 | 2012-10-17 | 西北工业大学 | Method and device for measuring propeller rotating speed of underwater direct current brushless thruster |
| CN106019153A (en) * | 2016-06-30 | 2016-10-12 | 南京中车浦镇城轨车辆有限责任公司 | Current synchronization testing apparatus and method of traction motor |
| CN109141539A (en) * | 2018-10-26 | 2019-01-04 | 中国科学院深海科学与工程研究所 | A kind of underwater Multifunctional AC motor control and test device |
-
2008
- 2008-12-06 CN CNU2008202251517U patent/CN201302576Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735869A (en) * | 2012-06-25 | 2012-10-17 | 西北工业大学 | Method and device for measuring propeller rotating speed of underwater direct current brushless thruster |
| CN102735869B (en) * | 2012-06-25 | 2014-02-26 | 西北工业大学 | Method and device for measuring propeller rotating speed of underwater direct current brushless thruster |
| CN106019153A (en) * | 2016-06-30 | 2016-10-12 | 南京中车浦镇城轨车辆有限责任公司 | Current synchronization testing apparatus and method of traction motor |
| CN109141539A (en) * | 2018-10-26 | 2019-01-04 | 中国科学院深海科学与工程研究所 | A kind of underwater Multifunctional AC motor control and test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090902 Termination date: 20101206 |