CN111664111A - Electric fan sways periodic measurement device based on electrode response electric field changes - Google Patents
Electric fan sways periodic measurement device based on electrode response electric field changes Download PDFInfo
- Publication number
- CN111664111A CN111664111A CN202010656387.1A CN202010656387A CN111664111A CN 111664111 A CN111664111 A CN 111664111A CN 202010656387 A CN202010656387 A CN 202010656387A CN 111664111 A CN111664111 A CN 111664111A
- Authority
- CN
- China
- Prior art keywords
- swing
- electric fan
- period
- electrodes
- processor
- 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.)
- Pending
Links
- 230000005684 electric field Effects 0.000 title description 7
- 238000005259 measurement Methods 0.000 title description 3
- 230000000737 periodic effect Effects 0.000 title description 2
- 230000003750 conditioning effect Effects 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/243—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the phase or frequency of ac
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
- F04D25/10—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provisions for automatically changing direction of output air
- F04D25/105—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provisions for automatically changing direction of output air by changing rotor axis direction, e.g. oscillating fans
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
A measuring device for the swing period of a swing electric fan is composed of a sensor, a signal amplifying and conditioning circuit, an AD converter, a processor and the like, and is characterized in that the sensor is represented by a pair of electrodes, is arranged near a monitored swing body (not in contact with the swing body) when in use, sequentially carries out signal amplifying and conditioning and analog-to-digital conversion (AD) on potential difference signals at the two electrodes, then enters the processor to carry out amplitude demodulation on the recorded potential difference signals, and estimates the period of the demodulated amplitude modulation signals as the swing period of the electric fan.
Description
Technical Field
The application relates to a device for measuring the swing period of a swing electric fan.
The electric fan is a common small electric appliance in daily life, and is usually designed to swing or sway left and right or pitch up and down in order to enlarge the air supply area and avoid discomfort of a human body caused by the concentration of air flow in one direction. When the electric fan with the swinging function is delivered or maintained, a method needs to measure the swinging period of the electric fan to see whether the electric fan is normal or not.
Background
The swing period of the swinging electric fan can be measured by a photoelectric conversion method like the rotating speed of the electric fan. A reflecting sheet (paper) is adhered to the swinging part of the electric fan, the measuring device emits light beams to the swinging body, and the swinging period is measured according to the change of the reflecting intensity of the swinging body in a circle. The device for measuring the swing period based on the photoelectric conversion principle not only needs to be matched with the reflective paper during working, but also needs to emit light energy to the reflective paper, so that the device has inconvenience in practical use.
Disclosure of Invention
The invention aims to provide a novel method.
The swinging period measuring device for swinging electric fan has no need of installing reflecting sheet (paper) on the swinging body, unlike photoelectric conversion measuring device, and is convenient to use.
The technical scheme is as follows.
A measuring device for the swing period of a swing electric fan is composed of a sensor, a signal amplifying and conditioning circuit, an AD converter, a processor and the like, and is characterized in that the sensor is represented by a pair of electrodes, is arranged near a monitored swing body (not in contact with the swing body) when in use, sequentially carries out signal amplifying and conditioning and analog-to-digital conversion (AD) on potential difference signals at the two electrodes, then enters the processor to carry out amplitude demodulation on the recorded potential difference signals, and estimates the period of the demodulated amplitude modulation signals as the swing period of the electric fan.
The natural law of discovery utilized by the above scheme is: (1) the electric fan generates electricity due to friction in the rotating and swinging processes, the electric field intensity of the electric fan is changed in an amplitude modulation mode along with the rotating and swinging processes, the rotating frequency of the electric fan corresponds to the carrier frequency of the electric fan, and the swinging frequency of the electric fan corresponds to the frequency of the amplitude modulation signal of the electric fan; (2) such a regular variation of the amplitude modulation form of the electric field intensity also includes a regular variation of the amplitude modulation form of the potential difference (i.e., voltage) between two points in the electric field.
Has the beneficial effects.
A device for measuring the swing period of the swing electric fan based on the electrode induction electric field change is built, and details are shown in the embodiment.
And (5) testing experiments. A rocking electric fan is taken as a monitoring object, and an induction plate provided with a pair of electrodes faces the electric fan and is about 0.3 m away from the electric fan. The fan was turned on (spin plus swing), the sensed voltage was continuously recorded and found to vary regularly in amplitude modulation, the carrier frequency of the variation was calculated to be just 27.5Hz (1650rpm), consistent with the nominal speed of the fan specification, and the frequency (0.101143Hz) or period (approximately 10 seconds) of the amplitude modulation signal was solved, as shown in fig. 4, to be just the nominal swing frequency or period of the fan specification. In the experiment, the reflecting sheet (or paper) is not needed to be pasted, so that the convenience is embodied, and the aim of the invention is achieved.
Drawings
FIG. 1 is a logic block diagram of a device for measuring the swing period of a swing fan based on the sensing of the electric field variation by electrodes according to the present invention.
Fig. 2 is a schematic diagram of an optoelectronic velocity measurement sensor.
FIG. 3 is a diagram illustrating an embodiment of the present application for monitoring a swing scene of a swing fan.
Fig. 4 is a schematic diagram of the amplitude modulation law and the amplitude modulated (envelope) signal spectrum of the monitoring signal. The upper graph is an amplitude modulated waveform and the lower graph is an envelope spectrum.
Examples
Manufacturing a two-layer PCB (printed circuit board) with the length of 10cm multiplied by 10cm, and coating copper on two rectangular areas of a top layer of the PCB to be used as a pair of electrodes; the pair of electrodes are connected to an analog input port of the NI USB 4431, the input mode is pseudo-differential, and the NI USB 4431 acquisition board card serves as a signal amplification conditioning and analog-to-digital conversion (AD) module; the NI USB 4431 is connected to a laptop via USB, and the laptop acts as a processor, and by programming a processing program for the processor, records the potential difference signals monitored by the pair of electrodes, exhibits amplitude modulation characteristics, demodulates, and calculates the wobble frequency or wobble period by using spectral analysis of the resulting amplitude modulated signal, in this case, the wobble frequency is about 0.1Hz, and the wobble period is about 10 seconds, as shown in fig. 4. The monitoring scenario is shown in fig. 3.
This embodiment is merely an example. When the system is specifically implemented, other types of amplification conditioning circuits and processors can be matched.
Claims (1)
1. A measuring device for the swing period of a swing electric fan is composed of a sensor, a signal amplifying and conditioning circuit, an AD converter, a processor and the like, and is characterized in that the sensor is represented by a pair of electrodes, is arranged near a monitored swing body (not in contact with the swing body) when in use, sequentially carries out signal amplifying and conditioning and analog-to-digital conversion (AD) on potential difference signals at the two electrodes, then enters the processor to carry out amplitude demodulation on the recorded potential difference signals, and estimates the period of the demodulated amplitude modulation signals as the swing period of the electric fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010656387.1A CN111664111A (en) | 2020-07-09 | 2020-07-09 | Electric fan sways periodic measurement device based on electrode response electric field changes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010656387.1A CN111664111A (en) | 2020-07-09 | 2020-07-09 | Electric fan sways periodic measurement device based on electrode response electric field changes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111664111A true CN111664111A (en) | 2020-09-15 |
Family
ID=72392144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010656387.1A Pending CN111664111A (en) | 2020-07-09 | 2020-07-09 | Electric fan sways periodic measurement device based on electrode response electric field changes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111664111A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596087A (en) * | 2020-06-27 | 2020-08-28 | 苏州格里德医学传感技术有限公司 | Rotating speed measuring device based on electrode sensing electrostatic field potential difference change |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006105941A (en) * | 2004-10-08 | 2006-04-20 | Canon Inc | Oscillating body apparatus, potential measuring apparatus using same, and image forming apparatus |
| JP2011200558A (en) * | 2010-03-26 | 2011-10-13 | Seiko Epson Corp | Biological information acquiring apparatus |
| CN102664588A (en) * | 2012-05-14 | 2012-09-12 | 中国航空工业集团公司北京长城计量测试技术研究所 | Digital demodulation method and device for frequency modulation and amplitude modulation signals |
| CN107367643A (en) * | 2017-08-28 | 2017-11-21 | 重庆大学 | A kind of portable power-frequency electric field measuring apparatus |
| CN108827624A (en) * | 2018-08-27 | 2018-11-16 | 浙江中星光电子科技有限公司 | One kind waving test adjusting method and waves test macro |
| CN110912338A (en) * | 2019-12-04 | 2020-03-24 | 赵晗 | Swing driving device |
| CN111297354A (en) * | 2020-02-17 | 2020-06-19 | 中国人民解放军军事科学院军事医学研究院 | Myoelectric and pressure combined hybrid sensor system with self-calibration function |
| CN111596087A (en) * | 2020-06-27 | 2020-08-28 | 苏州格里德医学传感技术有限公司 | Rotating speed measuring device based on electrode sensing electrostatic field potential difference change |
| CN213684633U (en) * | 2020-07-09 | 2021-07-13 | 苏州格里德医学传感技术有限公司 | Electric fan sways periodic measurement device based on electrode |
-
2020
- 2020-07-09 CN CN202010656387.1A patent/CN111664111A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006105941A (en) * | 2004-10-08 | 2006-04-20 | Canon Inc | Oscillating body apparatus, potential measuring apparatus using same, and image forming apparatus |
| JP2011200558A (en) * | 2010-03-26 | 2011-10-13 | Seiko Epson Corp | Biological information acquiring apparatus |
| CN102664588A (en) * | 2012-05-14 | 2012-09-12 | 中国航空工业集团公司北京长城计量测试技术研究所 | Digital demodulation method and device for frequency modulation and amplitude modulation signals |
| CN107367643A (en) * | 2017-08-28 | 2017-11-21 | 重庆大学 | A kind of portable power-frequency electric field measuring apparatus |
| CN108827624A (en) * | 2018-08-27 | 2018-11-16 | 浙江中星光电子科技有限公司 | One kind waving test adjusting method and waves test macro |
| CN110912338A (en) * | 2019-12-04 | 2020-03-24 | 赵晗 | Swing driving device |
| CN111297354A (en) * | 2020-02-17 | 2020-06-19 | 中国人民解放军军事科学院军事医学研究院 | Myoelectric and pressure combined hybrid sensor system with self-calibration function |
| CN111596087A (en) * | 2020-06-27 | 2020-08-28 | 苏州格里德医学传感技术有限公司 | Rotating speed measuring device based on electrode sensing electrostatic field potential difference change |
| CN213684633U (en) * | 2020-07-09 | 2021-07-13 | 苏州格里德医学传感技术有限公司 | Electric fan sways periodic measurement device based on electrode |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596087A (en) * | 2020-06-27 | 2020-08-28 | 苏州格里德医学传感技术有限公司 | Rotating speed measuring device based on electrode sensing electrostatic field potential difference change |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213684633U (en) | Electric fan sways periodic measurement device based on electrode | |
| NO20063141L (en) | System for differential determination of a proteolytic enzyme level in a body fluid | |
| CN111664111A (en) | Electric fan sways periodic measurement device based on electrode response electric field changes | |
| CN103549944A (en) | Heart rate measurement method and device | |
| US4281325A (en) | Positive feedback meter pulse initiator | |
| JP2010141469A (en) | Sensor network system | |
| US20210205747A1 (en) | Air Filter Clog Detector | |
| WO2021120605A1 (en) | Chemical concentration sensor | |
| EP3873341B1 (en) | Switch circuitry for a fluid monitoring device | |
| CA2237779A1 (en) | Meter testing circuit | |
| CN115447324B (en) | Tire temperature detection system and method | |
| CN203148968U (en) | Mining ultrasonic air velocity transducer | |
| CN207675961U (en) | A kind of metal detector | |
| JP4050838B2 (en) | Gas detector | |
| CN111596087A (en) | Rotating speed measuring device based on electrode sensing electrostatic field potential difference change | |
| US6445142B1 (en) | Apparatus and method for remotely detecting a magnetic ballast | |
| CN202956336U (en) | Coal mine purpose infrared methane online sampling sensor | |
| CN213338065U (en) | Photoelectric sensor for conveyor belt | |
| CN204464960U (en) | A kind of motor temperature protector | |
| CN211785137U (en) | Chlorophyll content measuring device based on phase locking technology | |
| CN201387434Y (en) | Vibration acceleration meter of wind-driven generator nacelle | |
| CN2355320Y (en) | Portable mechanic fault inspector | |
| CN205483042U (en) | Digital temperature and humidity transmitter | |
| CN216050343U (en) | Temperature acquisition device for power device of air conditioner outer plate | |
| CN208522759U (en) | A kind of novel optical module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |