CN203825873U - Wireless photoelectric rotating speed measuring instrument - Google Patents
Wireless photoelectric rotating speed measuring instrument Download PDFInfo
- Publication number
- CN203825873U CN203825873U CN201420266443.0U CN201420266443U CN203825873U CN 203825873 U CN203825873 U CN 203825873U CN 201420266443 U CN201420266443 U CN 201420266443U CN 203825873 U CN203825873 U CN 203825873U
- Authority
- CN
- China
- Prior art keywords
- measuring instrument
- measuring
- wireless
- rotating speed
- photoelectric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model relates to a wireless photoelectric rotating speed measuring instrument. The measuring instrument is composed of a measuring instrument host and a rotating speed measuring table. The measuring instrument host is provided with a liquid crystal screen, a selection key, a function key, an on/off key and a receiving antenna. The rotating speed measuring table is composed of a motor, a measuring fluted disc, a photoelectric sensor measuring groove and a signal transmitting antenna. The rotating speed measuring table is provide with an on/off key, a function knob, a speed adjusting knob and a direction knob. A microprocessor chip and a wireless transmitting and receiving chip are arranged in the measuring instrument host and the rotating speed measuring table. According to the measuring instrument, through the processing of photoelectric sensing signals and the calculation of the microprocessor, the real-time calculation, measurement, display and wireless transmission of different rotating speeds can be realized, so the measuring instrument is suitable for the measurement and teaching experiments of courses, such as electrotechnics, physics, etc.
Description
Technical field
The utility model relates to a kind of wireless photoelectric tachometer of measuring, belongs to the field of application of electronic technology and experimental applications.
Background technology
Tachometric survey is an important content in the performance test of article for rotation power machine, in applications such as Aero-Space, ship power and rotating machineries, tach signal is also an important monitoring parameter, the size of rotating speed and variation can show that whether mechanical rotation is normal, not only reflect the duty of system, and other performance parameters are determined, especially in control system, play an important role, the accuracy of its measurement and reliability directly affect control accuracy and the security performance of system.
Along with the progress of modern science, precision, volume, the jamproof requirement to speed measuring system of many military affairs, industrial circle is more and more higher, and quick, high precision speed measuring system seems most important reliably.
Tachometric survey can be divided into by the mounting means of sensor: contact and contactless.Contact type measurement mode when usually requiring to measure, is measured axle and need be kept point-blank with measured axle, so be generally applied to middle and slow speed of revolution measurement.
Photoelectric sensor is the key element of realizing opto-electronic conversion in photodetector system, and it converts the infrared variation that waits light signal to measured variation, then further converts light signal to electric signal by photovalve.Photoelectric detecting method has the advantages such as precision is high, reaction is fast, antijamming capability is strong, and it is many to survey parameter, sensor simple in structure.Electro-optical pickoff is very extensive in the application detecting and control.
Although, on market, have the surveying instrument for rotating speed, but be all integrated finished product, student is still difficult to concrete understanding and grasps principle and the method measured, and Radio Transmission Technology, can realize the rotation situation of measuring at a distance motor, this measuring instrument tests the speed by photoelectric sensing mode, it is a kind of non-contact measurement, measuring instrument is by the processing to photosignal and the calculating of microprocessor, can realize the real-time computation and measurement to different rotating speeds, the functions such as demonstration and wireless transmission, there is response fast, accuracy advantages of higher, be suitable for electrotechnics, the measurement of the courses such as physics and education experiment.
Utility model content
For the deficiency of existing measurement and experimental apparatus, the utility model provides a kind of tachometer of measuring that can wireless measurement, convenient photoelectric sense technology and the signal wireless transmission technology of understanding and grasping tachometric survey, this wireless photoelectric tachometer of measuring is in conjunction with photoelectric sensor, microprocessor and wireless signal transmission and reception, and adopted three kinds to measure fluted disc, can make student can better understand and grasp principle and the method for tachometric survey.
Measuring instrument is made up of measuring instrument main frame and tachometric survey platform, is provided with liquid crystal display, selection key on measuring instrument main frame, function button, switch key and receiving antenna; Tachometric survey platform is made up of motor, measurement fluted disc, photoelectric sensor measuring flume and signal emitting antenna, is provided with switch key, function knob, speed adjusting knob and direction knob on tachometric survey platform; In measuring instrument main frame and tachometric survey platform, all there is microprocessor chip and wireless transmit and receiving chip.
This measuring instrument has adopted the tachometric survey mode of photoelectric sensing type, in the time that motor rotates, utilize photoelectric sensor to carry out photosignal sampling by measuring fluted disc, make the signal that photoelectric receiving tube receives become light pulse by measuring fluted disc to blocking the intermittence of light path simultaneously.
On the tachometric survey platform of this measuring instrument, be fixed with motor, by the speed adjusting knob on tachometric survey platform, can regulate the motor speed of being furnished with, and binding function selector switch, the measurement fluted disc center that has different perforations is fixed on motor rotary shaft, then be placed on the middle measurement of carrying out different rotating speeds of photoelectric sensor measuring flume by measuring fluted disc, be carved with rule in the middle of sensing measurement groove, convenient placement accurately measured fluted disc.Meanwhile, this measuring instrument is also provided with the direction knob of rotating speed, can set the rotation direction of motor, and this measuring instrument can carry out the measurement of real electrical machinery rotating speed by the coupling of measuring fluted disc.
That the microprocessor chip in measuring instrument main frame of the present utility model and tachometric survey platform adopts is the microprocessor MSP430F2012 of 16 of the new a high-performance of releasing of TI company.Its built-in frequency of operation is up to 16MIPS, and super low-power consumption is operated at ordinary times sleep state and saves electric energy, interrupts can within the time of less than 1 μ s, waking up to full speed operation pattern from super low-power consumption 500nA standby mode while generation.Having 128K can online programming storer, aspect peripheral function element, MSP430F2012 is also integrated 10 AD, 16 bit timing devices, capture compare device, WatchDog Timer, detection of power loss, USI communication module etc., MSP430F2012 can meet the needs to Low Power High Performance.
The measurement fluted disc of this measuring instrument and motor rotary shaft are dismountable connected modes, it measures fluted disc a perforation, be symmetrical in two perforations of diameter and four perforation three types of vertical symmetry, the corresponding radian of perforation breach is 30 °, the measurement situation of different rotating speeds be can be applied to respectively, and can the measuring method under different measuring mode and the impact on tachometric survey error be compared with the measurement dish in monodentate hole.
Brief description of the drawings
Fig. 1 is measuring instrument main frame outside drawing, wherein 1 be liquid crystal display, the 2nd, selection key, the 3rd, function button, the 4th, switch key, the 5th, receiving antenna.
Fig. 2 is the composition diagram of tachometric survey platform.Wherein 6 are motor, the 7th, emitting antenna, the 8th, switch key, the 9th, function knob, the 10th, speed adjusting knob, the 11st, direction knob, the 12nd, photoelectric sensor measuring flume, the 13rd, measure fluted disc, the 14th, photoelectric sensor, the 15th, motor reel.
Fig. 3 is the measurement fluted disc planimetric map that is symmetrical in two perforations of diameter.
Embodiment
By reference to the accompanying drawings, illustrate work and the concrete performance of wireless photoelectric tachometer of measuring below.
In this measuring instrument photoelectric sensor measuring flume, there is photoelectric sensor, the ML100-8-H-350RT photoelectric sensor that its photoelectric sensor selects Pepperl & Fuchs Inc. to produce, this sensor has background inhibit feature, and maximum detection apart from 350mm, is output as NPN type.Utilize the diffuse reflection principle of light, photoelectric sensor produces pulse-modulated signal, through measuring the reflection of fluted disc, if the reflected light of receiver exceedes the threshold value of setting, exports high level signal; If measure fluted disc do not exist, the signal of reception a little less than, output low level signal.In experiment, sensor is placed in apart from the position of measuring the about 150mm of fluted disc, in the time measuring the light beam of the inswept photoelectric sensor of fluted disc, sensor will be exported a pulse signal.
The wireless transmit of this measuring instrument and receiving chip adopt the CC1100 of TI company, and CC1100 is the UHF transceiver of the real monolithic of a kind of low cost, are to aim at low-consumption wireless to apply and design.Main circuit will be set as 315, 433, 868 and ISM industry and medical science frequency range and the SRD short-range device frequency range of 915MHz, high workload speed 500kbps, support 2-FSK, the modulation system of GFSK and MSK, there is high sensitivity and low packet error rate, built in hardware CRC error detection and point-to-multipoint delivery address are controlled, lower current drain, the output power of control able to programme, to all can reach+10dBm of support frequency, support low-power wireless arousal function, support the front Automatic clearance channel access of transmission, module can be established address by software simultaneously, software programming is very convenient.
The Circuits System of the tachometric survey of this measuring instrument mainly comprises: the processing of photoelectric sensor circuit, signal and signal transmitting and receiving circuit.In the time that motor rotates, due to blocking of perforation on measurement fluted disc, the receiving tube of its photoelectric sensor can only receive light signal off and on, the light signal that signal processing system receives receiving tube is converted to pulse electrical signal, the photosignal of photoelectric sensor is by signal processing circuit and A/D conversion, the pulse signal that photoelectric sensor is exported is converted to digital signal and sends into microprocessor, and signal is gone out by CC1100 wireless transmit, after last signal is received by the CC1100 of measuring instrument main frame, by microprocessor to the step-by-step counting receiving, just can calculate the rotating speed of motor according to the number of pulse electrical signal and time used, finally by liquid crystal display, speed conditions is shown.
The motor of this measuring instrument is fixed on the top of tachometric survey platform, and by special driving chip control rotating speed, the operating voltage of the direct current motor of employing is 24V, the alignment circuit of use is special driving integrated chip L298N, its output current is 2A, maximum current 4A, maximum operating voltage 50V, can drive inductive load, its input end can directly be connected with microprocessor, be subject to easily microprocessor control to carry out speed governing, meanwhile, also can realize very easily the rotating of motor.The adjustment of motor speed is used programmable counter array mode, 5 16 seizure/comparison modules of PCA can be configured to width modulation output PWM mode of operation independently, by changing the dutycycle of PWM output signal, thereby reach the regulation and control to motor speed.
The liquid crystal display of this measuring instrument adopts 128 × 64 LCDs of low-voltage, low-power consumption band Chinese word library.It has 4/8 bit parallel, 2 lines or 3 line serial multiple interfaces modes, and its display resolution is 128 × 64, built-in 8192 16 × 16 Chinese characters and 128 16 × 8 ascii character-sets.This module interface mode is flexible, and operational order is simple, convenient, can show the Chinese character of 8 × 4 row 16 × 16 dot matrix, also can complete figure and show, can form complete Chinese man-machine interaction graphical interfaces.
The processing of this measuring instrument by photoelectric sensing signal and the calculating of microprocessor, can realize the functions such as real-time computation and measurement, demonstration and wireless transmission to different rotating speeds, is suitable for measurement and the education experiment of the course such as electrotechnics, physics.
Claims (4)
1. a wireless photoelectric tachometer of measuring, measuring instrument is made up of measuring instrument main frame and tachometric survey platform, it is characterized in that: on measuring instrument main frame, be provided with liquid crystal display, selection key, function button, switch key and receiving antenna; Tachometric survey platform is made up of motor, measurement fluted disc, photoelectric sensor measuring flume and signal emitting antenna, is provided with switch key, function knob, speed adjusting knob and direction knob on tachometric survey platform; In measuring instrument main frame and tachometric survey platform, all there is microprocessor chip and wireless transmit and receiving chip.
2. wireless photoelectric tachometer of measuring according to claim 1, it is characterized in that: that the microprocessor chip in its measuring instrument main frame and tachometric survey platform adopts is the microprocessor MSP430F2012 of 16 of the new high-performance of releasing of TI company, and that its wireless transmit and receiving chip adopt is the CC1100 of TI company.
3. wireless photoelectric tachometer of measuring according to claim 1, it is characterized in that: it measures fluted disc and motor rotary shaft is dismountable connected mode, it is measured, and fluted disc has a perforation, is symmetrical in two perforations of diameter, four perforation three types of vertical symmetry, and the corresponding radian of perforation breach is 30 °.
4. wireless photoelectric tachometer of measuring according to claim 1, is characterized in that: in its photoelectric sensor measuring flume, have photoelectric sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420266443.0U CN203825873U (en) | 2014-05-23 | 2014-05-23 | Wireless photoelectric rotating speed measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420266443.0U CN203825873U (en) | 2014-05-23 | 2014-05-23 | Wireless photoelectric rotating speed measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203825873U true CN203825873U (en) | 2014-09-10 |
Family
ID=51481347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420266443.0U Expired - Fee Related CN203825873U (en) | 2014-05-23 | 2014-05-23 | Wireless photoelectric rotating speed measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203825873U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324289A (en) * | 2016-10-31 | 2017-01-11 | 吉林大学 | Verification system of automobile wheel speed real-time detector based on active vision |
| CN109965776A (en) * | 2017-12-23 | 2019-07-05 | 天佑电器（苏州）有限公司 | Driving device and burnisher |
-
2014
- 2014-05-23 CN CN201420266443.0U patent/CN203825873U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324289A (en) * | 2016-10-31 | 2017-01-11 | 吉林大学 | Verification system of automobile wheel speed real-time detector based on active vision |
| CN109965776A (en) * | 2017-12-23 | 2019-07-05 | 天佑电器（苏州）有限公司 | Driving device and burnisher |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203658382U (en) | Photoelectric rotation speed measurement instrument | |
| CN107340021B (en) | Intelligent remote water meter system based on Zigbee network | |
| CN203825873U (en) | Wireless photoelectric rotating speed measuring instrument | |
| CN203941559U (en) | A kind of unmanned monitoring timekeeping system that is applied to middle-distance race campaign | |
| CN203520055U (en) | Clock device | |
| CN203250170U (en) | Inverter operation panel of knob encoder | |
| CN203551029U (en) | Automatic water level sensor | |
| CN203405471U (en) | A rotation detecting apparatus of a large wind-driven generator set | |
| CN203689786U (en) | Multifunctional rotating speed measuring instrument based on microprocessor | |
| CN204963696U (en) | Flexible rule | |
| CN207097060U (en) | A kind of image detection device | |
| CN204649151U (en) | Plank length intelligent device for measuring | |
| CN202652544U (en) | Small wind power field low power consumption wind measurement data collection system | |
| CN203231739U (en) | Irregular area automatic measuring device | |
| CN202330330U (en) | Gas dew point measuring device based on humiture detection | |
| CN205582260U (en) | Self -control system of checking meter of geothermol power station usefulness | |
| CN201364112Y (en) | Mechanical measuring tool indicating gauge | |
| CN211956163U (en) | Cricket control experiment system based on resistance screen position detection | |
| CN202300375U (en) | Drilling depth tester for roller-bit hole rig | |
| CN103234492A (en) | Irregular area automatic measuring device | |
| CN202083437U (en) | Distributed intelligent wireless liquid level detection framework | |
| CN203302069U (en) | Automatic greenhouse sprinkling control system | |
| CN202024804U (en) | Wireless measurement and control intelligent limnimeter | |
| CN103236150A (en) | Distributed wireless humiture measuring apparatus and method adopting measuring apparatus to measure humiture | |
| CN203629585U (en) | Industrial stopwatch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20170523 |