CN210243677U - Rotating speed measuring device based on photoelectric sensor - Google Patents
Rotating speed measuring device based on photoelectric sensor Download PDFInfo
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- CN210243677U CN210243677U CN201920783700.0U CN201920783700U CN210243677U CN 210243677 U CN210243677 U CN 210243677U CN 201920783700 U CN201920783700 U CN 201920783700U CN 210243677 U CN210243677 U CN 210243677U
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Abstract
The utility model provides a rotating speed measuring device based on a photoelectric sensor, which comprises the photoelectric sensor, a signal acquisition and processing module, a data analysis and processing module, a power module, a Bluetooth module and a crystal oscillator module; the utility model discloses can utilize the PCB technique to carry out corresponding structural design, with photoelectric sensor, signal acquisition and processing module, data analysis and processing module, power module, bluetooth module and crystal oscillator module integration together, realize measuring device's miniaturation and integration, improved greatly rotational speed measuring device's interference killing feature to the detection to the adversion speed equipment in narrow and small space has been realized. And the independent crystal oscillator module provides high-precision clock frequency, so that the measurement precision is greatly improved. The utility model discloses utilize bluetooth to realize that rotational speed data wirelessly transmits for the host computer with digital signal's form, like notebook computer, panel computer, cell-phone etc. form record and report, realize the detection to rotational speed equipment in the enclosure space.
Description
Technical Field
The utility model relates to a rotational speed measurement technical field, especially a rotational speed measurement device based on photoelectric sensor.
Background
In daily life and production, rotating machines are widely applied, such as wheels of automobiles, generators of power plants, rotating motors of electric fans, propellers of ships and the like, one important index of the equipment is the rotating speed, whether the rotating speed is accurate or not, and the rotating speed control precision is directly related to the use safety, the use efficiency and the like of the equipment, so that the rotating speed needs to be accurately measured.
The rotation speed measuring device generally comprises a rotation speed sensor, a signal processing system, a display device and the like, as shown in fig. 1. The current rotational speed measuring device's rotational speed sensor, input circuit, signal input circuit, variable circuit, keyboard input, measuring circuit and microprocessor, output circuit, the upper computer between generally adopt the wire to connect, the power supply of device also adopts outside wire to connect the power supply, signal transmission adopts analog signal transmission basically, rotational speed signal receives external environment factor: large influence such as voltage, magnetic field and the like is caused, and a coarse error is easily generated; the existing rotating speed measuring device has the disadvantages that because all components are not subjected to miniaturization treatment and are integrated together, the volume is generally large, and the rotating speed of some equipment in a narrow space or a closed space cannot be measured, such as the rotating speed of a centrifugal machine; because the components of the existing rotating speed measuring device are connected by leads, the rotating speed of other rotating objects on the rotating object can not be accurately measured.
Thus, chinese patent, application No.: 201620517495.X, publication no: CN205786679U, which in detail discloses a motor rotation speed measuring device, including a photoelectric sensor, configured to measure a rotation speed of a motor, convert a rotation speed signal of the motor into a photoelectric pulse signal, and send the photoelectric pulse signal to a signal processing circuit; the signal processing circuit is used for amplifying and shaping the photoelectric pulse signal and outputting the photoelectric pulse signal to the singlechip; and the singlechip is used for counting the motor rotating speed pulse according to the photoelectric pulse signal so as to determine the rotating speed frequency of the motor. The patent realizes digital measurement of the rotating speed of the motor; the photoelectric sensor has anti-electromagnetic interference performance and can be applied to different measurement occasions; the dynamic characteristic of the photoelectric element is good, and the photoelectric element can be used for high-speed measurement; the photoelectric sensor is not in contact with the motor to be measured, so that the rotation of the measured object is not interfered; the rotating speed measurement with different precision can be realized according to the number of the reflective sheets on the rotating shaft. However, the patent adopts a complex amplifying and filtering shaping circuit for optical signals, because of more elements and large power consumption, the circuit is not suitable for long-term measurement, the long-term stability and accuracy of the measurement are greatly affected by temperature, the patent cannot realize accurate measurement of the rotating speed of other rotating objects on the rotating object, and the rotating speed of equipment in a narrow space and a closed space cannot be measured.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in providing a rotational speed measuring device based on photoelectric sensor, realize miniaturation, integrate, to in the narrow and small space with rotate the object on the detection of other rotation object rotational speed equipment to improved interference killing feature and measurement accuracy greatly, and not influenced by temperature, visible light, the consumption is very low, is suitable for the battery powered long-term measurement very much.
The utility model discloses a realize like this: a rotating speed measuring device based on a photoelectric sensor comprises the photoelectric sensor, a signal acquisition and processing module, a data analysis and processing module, a power supply module, a Bluetooth module and a crystal oscillator module;
the photoelectric sensor is connected with the signal acquisition and processing module; the signal acquisition and processing module, the Bluetooth module, the crystal oscillator module and the power supply module are respectively connected to the data analysis and processing module;
the photoelectric sensor measures the rotating speed of a rotating object, converts a rotating speed signal of the rotating object into a photoelectric pulse signal and sends the photoelectric pulse signal to the signal acquisition and processing module; the signal acquisition and processing module carries out level conversion, amplification, jitter elimination, filtering and direction identification on the photoelectric pulse signal, then transmits the photoelectric pulse signal to the data analysis and processing module, simultaneously the crystal oscillator module provides a basic clock signal for the data analysis and processing module, and the data analysis and processing module reads sampling time; the data analysis and processing module analyzes the photoelectric pulse signal and calculates and processes the photoelectric pulse signal by combining sampling time to obtain a rotating speed value; the Bluetooth module wirelessly transmits the rotating speed digital signals generated by the data analysis and processing module to the upper computer in a wireless transmission mode.
Furthermore, the signal acquisition and processing module, the data analysis and processing module, the power module, the Bluetooth module and the crystal oscillator module are integrated into a whole.
Furthermore, the data analysis and processing module is an MCU microprocessor, and the signal acquisition and processing module is a pulse shaping chip.
Further, the data analysis and processing module includes an operating state indication pin CMPO, a power supply voltage measurement pin SCLK, a crystal oscillator pin XTAL2, a crystal oscillator pin XTAL1, a first power supply pin Vcc, a first ground pin GND, a signal input pin CCPO, an external interrupt output pin INT3/TxD _2, an external interrupt input pin INT2/RxD _2, a timer external input pin T0CLKO, a timer external input pin T0/ECI, an external interrupt output pin INT1, and an external interrupt output pin INT 0;
the signal acquisition and processing module comprises a signal output end Y, a second power supply pin VCC, a signal input end A and a second grounding pin GND;
the photoelectric sensor comprises a photoelectric receiving tube and a photoelectric emitting tube;
the Bluetooth module comprises a third grounding pin GND, a power supply pin VDDZ, a reset pin RES _ N, an input/output pin P06, a fourth grounding pin GND, a fifth grounding pin GND, a data receiving pin RX, a data output pin TX, a clear-to-send BCTS and a request-to-send pin BRTS;
the crystal oscillator module comprises a capacitor C6, a capacitor C7 and a crystal oscillator crystal Y1;
the power supply module comprises a battery, a power switch S1 and a voltage stabilizing chip; the voltage stabilizing chip comprises a power input end VIN, a power output end VOUT, a sixth grounding pin GND and an enable pin EN;
the negative electrode of the battery is connected with a power ground; the positive pole of the battery is connected with the input end of a power switch S1; the first grounding pin GND is connected with a power ground; the enable pin EN is connected in parallel with the power input end VIN and then connected to the output end of the power switch S1; the power output terminal VOUT is connected to the working state indication pin CMPO;
one ends of the capacitor C6 and the capacitor C7 are connected in parallel and then are connected with a power ground; the other end of the capacitor C6 is connected with one end of the crystal oscillator crystal Y1 after being connected with the crystal oscillator pin XTAL2 in parallel; the other end of the capacitor C7 is connected with a crystal oscillator pin XTAL1 in parallel and then is connected with the other end of the crystal oscillator crystal Y1;
one end of the photoelectric emission tube is connected with the power output end VOUT, and the other end of the photoelectric emission tube is connected with a power ground; one end of the photoelectric receiving tube is connected to the signal input end A, and the other end of the photoelectric receiving tube is connected to a power ground;
the second grounding pin GND is connected with a power ground; the signal output end Y is connected with the signal input pin CCPO; the second power supply pin VCC is connected with the power supply output terminal VOUT;
the external interrupt output pin INT3/TxD _2 is connected to the data receive pin RX; the external interrupt input pin INT2/RxD _2 is connected to the data output pin TX; the timer external input pin T0CLKO is connected to the input/output pin P06; the timer external input pin T0/ECI is connected to the reset pin RES _ N; the external interrupt output pin INT1 is connected to the request transmission pin BRTS; the external interrupt output pin INT0 is connected to the clear-to-send BCTS; the first power supply pin Vcc is connected to the power supply output end VOUT;
the third, fourth and fifth grounding pins GND are respectively connected with a power ground; the power supply pin VDDZ is connected to the power supply output terminal VOUT.
Further, the power supply module further comprises a resistor R4 and a resistor R5; the data analysis and processing module further comprises a power supply voltage measurement pin SCLK; one end of the resistor R4 is connected to the output end of the power switch S1; the other end of the resistor R4 and one end of the resistor R5 are connected in parallel and then connected to the power supply voltage measurement pin SCLK; the other end of the resistor R5 is connected to the power ground.
Further, the power module further comprises a capacitor C5, a capacitor C1, a capacitor C3, a resistor R6 and a resistor R2; the voltage stabilizing chip further comprises a bypass pin BYP; the bypass pin BYP is connected to one end of the capacitor C5, and the other end of the capacitor C5 is connected to a power ground; one end of the resistor R2 is connected in parallel with the enable pin EN and the power input end VIN, and the other end of the resistor R2, one end of the capacitor C1, one end of the capacitor C3 and one end of the resistor R6 are connected in parallel and then connected to the power output end VOUT; the other end of the resistor R6 is connected to a working state indication pin CMPO; the other end of the capacitor C1 and the other end of the capacitor C3 are connected in parallel and then connected with a power ground.
Further, the power supply module further comprises a light emitting diode LD 1; the anode of the light-emitting diode LD1 is connected to the other end of the resistor R6; the cathode of the led LD1 is connected to the operation status indication pin CMPO.
Further, the circuit also comprises a resistor R3, a resistor R1, a capacitor C4 and a capacitor C2; one end of the resistor R3 is connected to the power output terminal VOUT, and the other end of the resistor R3 and one end of the capacitor C4 are respectively connected to one end of the photo-receiving tube; the other end of the photoelectric receiving tube is connected with the other end of the capacitor C4 in parallel and then is connected with a power ground; one end of the resistor R1 is connected to one end of the photoemissive tube, and the other end of the resistor R1 is connected in parallel with one end of the capacitor C2 and then connected to the power output terminal VOUT; the other end of the capacitor C2 and the other end of the photoelectric emission tube are connected in parallel and then connected with a power ground.
Further, the frequency of the crystal oscillator crystal Y1 is 22.1184 HZ.
Further, the voltage of the battery is 9V.
The utility model has the advantages of as follows:
(1) the utility model discloses can utilize the PCB technique to carry out corresponding structural design, with photoelectric sensor, signal acquisition and processing module, data analysis and processing module, power module, bluetooth module and crystal oscillator module integration together, realize measuring device's miniaturization and integration, improve greatly rotational speed measuring device's interference killing feature to realized rotating speed equipment and the rotational speed that rotates the object in addition on the narrow and small space and detected.
(2) The utility model discloses utilize microprocessor measurement control technique to gather rotational speed signal to the measurement of rotational speed is realized in the secondary development of main control chip procedure, and provides the clock frequency of high accuracy through independent crystal oscillator module, has improved measurement accuracy greatly.
(3) The utility model discloses utilize bluetooth to realize that rotational speed data wirelessly transmits for the host computer with digital signal's form, like notebook computer, panel computer, cell-phone etc. form record and report, realize detecting the rotational speed of other rotation object in the rotational speed equipment and the object of commentaries on classics object in the enclosure space.
(4) Traditional speedometer adopts complicated enlargies, filtering shaping circuit to light signal, because the component is many, and the consumption is big, is not suitable for long-term measurement, and the temperature is greatly influenced with the degree of accuracy to measuring long-term stability, and the utility model discloses a receiving and dispatching integration photoelectric sensor carries out signal processing operation filtering through the pulse shaping chip directly sending into in MCU microprocessor, shows speed through software algorithm, does not receive temperature, visible light influence, and the consumption is very low, is suitable for battery powered long-term measurement very much.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a conventional rotation speed measuring device in the background art.
Fig. 2a is the effect schematic diagram of the PCB structure of the rotation speed measuring device of the present invention.
Fig. 2b is a schematic diagram corresponding to the functional areas in fig. 2 a.
Fig. 3 is a schematic diagram of the rotation speed measuring device of the present invention.
Fig. 4 is a circuit diagram of the rotation speed measuring device of the present invention.
In the figure: 1. photoelectric sensor, 11, photoelectric receiving tube, 12, photoelectric emission pipe, 2, signal acquisition and processing module, 3, data analysis and processing module, 4, power module, 5, bluetooth module, 6, crystal oscillator module, 7, the communication port of data line, 8, rotating object, 9, reflecting material.
Detailed Description
Referring to fig. 1 to 4, the utility model provides a rotation speed measuring device based on a photoelectric sensor, which comprises a photoelectric sensor 1, a signal acquisition and processing module 2, a data analysis and processing module 3, a power module 4, a bluetooth module 5 and a crystal oscillator module 6;
the photoelectric sensor 1 is connected to the signal acquisition and processing module 2; the signal acquisition and processing module 2, the Bluetooth module 5, the crystal oscillator module 6 and the power supply module 4 are respectively connected to the data analysis and processing module 3;
the photoelectric sensor 1 measures the rotating speed of the rotating object 8, converts a rotating speed signal of the rotating object 8 into a photoelectric pulse signal, and sends the photoelectric pulse signal to the signal acquisition and processing module 2; the signal acquisition and processing module 2 performs level conversion, amplification, jitter elimination, filtering and direction identification on the photoelectric pulse signal, and then transmits the photoelectric pulse signal to the data analysis and processing module 3, meanwhile, the crystal oscillator module 6 provides a basic clock signal for the data analysis and processing module 3, and the data analysis and processing module 3 reads sampling time; the data analysis and processing module 3 analyzes the photoelectric pulse signal and calculates and processes the photoelectric pulse signal by combining sampling time to obtain a rotating speed value; the Bluetooth module 5 wirelessly transmits the rotating speed digital signals generated by the data analysis and processing module 3 to an upper computer in a wireless transmission mode.
Bluetooth module 5 utilizes bluetooth to realize that rotational speed data wirelessly transmits for the host computer with digital signal's form, like notebook computer, panel computer, cell-phone etc. forms record and report, realizes the detection to rotational speed equipment in the enclosure space.
Traditional speedometer adopts complicated enlargies, filtering shaping circuit to light signal, because the component is many, and the consumption is big, is not suitable for long-term measurement, and the temperature is greatly influenced to measuring long-term stability and the degree of accuracy, and the utility model discloses a receiving and dispatching integration photoelectric sensor 1, through pulse shaping chip 2 promptly signal acquisition and processing module 2 directly send into MCU microprocessor 3 in carry out signal processing operation filtering, show the speed through software algorithm, do not receive temperature, visible light influence, the consumption is very low, is suitable for battery powered long-term measurement very much.
In specific implementation, in a preferred embodiment, the signal acquisition and processing module 2, the data analysis and processing module 3, the power module 4, the bluetooth module 5 and the crystal oscillator module 6 are integrated into a whole, so that integration and miniaturization are realized, the traditional wire connection is not needed, the device is suitable for rotating speed measurement in narrow closed space, the device is also suitable for rotating speed measurement of a rotating object on the rotating object, and the device cannot be used for measuring the rotating speed due to interference of a wire or a data wire of the traditional rotating speed measurement equipment. Fig. 2 shows an embodiment of the effect of integration using the existing PCB technology. Utilize current PCB technique to carry out corresponding structural design, with photoelectric sensor 1, signal acquisition and processing module 2, data analysis and processing module 3, power module 4, bluetooth module 5 and crystal oscillator module 6 integration together, realize measuring device's miniaturization and integration, thereby will rotational speed measuring device make and be wireless digital, improved greatly rotational speed measuring device's interference killing feature to realized the detection to rotational speed equipment in narrow and small space, and to the detection to the rotational speed of other rotating object on the rotating object.
In a specific implementation, in a preferred embodiment, the data analyzing and processing module 3 is an MCU microprocessor 3, and the signal collecting and processing module 2 is a pulse shaping chip 2. Data analysis and processing module 3 adopt MCU microprocessor, utilize microprocessor measurement control technique to gather rotational speed signal to the measurement of rotational speed is realized in the secondary development of main control chip procedure, and provides the clock frequency of high accuracy through independent crystal oscillator module 6, has improved the precision of sampling time greatly, thereby improves measurement accuracy.
In a specific implementation, in a preferred embodiment, the data analysis and processing module 3 includes an operation status indication pin CMPO, a power supply voltage measurement pin SCLK, a crystal oscillator pin XTAL2, a crystal oscillator pin XTAL1, a first power supply pin Vcc, a first ground pin GND, a signal input pin CCPO, an external interrupt output pin INT3/TxD _2, an external interrupt input pin INT2/RxD _2, a timer external input pin T0CLKO, a timer external input pin T0/ECI, an external interrupt output pin INT1, and an external interrupt output pin INT 0;
the signal acquisition and processing module 2 comprises a signal output end Y, a second power supply pin VCC, a signal input end A and a second grounding pin GND;
the photoelectric sensor 1 comprises a photoelectric receiving tube 11 and a photoelectric emitting tube 12;
the bluetooth module 5 comprises a third grounding pin GND, a power supply pin VDDZ, a reset pin RES _ N, an input/output pin P06, a fourth grounding pin GND, a fifth grounding pin GND, a data receiving pin RX, a data output pin TX, a clear-to-send BCTS and a request-to-send pin BRTS;
the crystal oscillator module 6 comprises a capacitor C6, a capacitor C7 and a crystal oscillator crystal Y1;
the power module 4 comprises a battery, a power switch S1 and a voltage stabilizing chip; the voltage stabilizing chip comprises a power input end VIN, a power output end VOUT, a sixth grounding pin GND and an enable pin EN;
the negative electrode of the battery is connected with a power ground; the positive pole of the battery is connected with the input end of a power switch S1; the first grounding pin GND is connected with a power ground; the enable pin EN is connected in parallel with the power input end VIN and then connected to the output end of the power switch S1; the power output terminal VOUT is connected to the working state indication pin CMPO;
one ends of the capacitor C6 and the capacitor C7 are connected in parallel and then are connected with a power ground; the other end of the capacitor C6 is connected with one end of the crystal oscillator crystal Y1 after being connected with the crystal oscillator pin XTAL2 in parallel; the other end of the capacitor C7 is connected with a crystal oscillator pin XTAL1 in parallel and then is connected with the other end of the crystal oscillator crystal Y1;
one end of the photoelectric emission tube 12 is connected with the power output terminal VOUT, and the other end of the photoelectric emission tube 12 is connected with a power ground; one end of the photoelectric receiving tube 11 is connected to the signal input end a, and the other end of the photoelectric receiving tube 11 is connected to a power ground;
the second grounding pin GND is connected with a power ground; the signal output end Y is connected with the signal input pin CCPO; the second power supply pin VCC is connected with the power supply output terminal VOUT;
the external interrupt output pin INT3/TxD _2 is connected to the data receive pin RX; the external interrupt input pin INT2/RxD _2 is connected to the data output pin TX; the timer external input pin T0CLKO is connected to the input/output pin P06; the timer external input pin T0/ECI is connected to the reset pin RES _ N; the external interrupt output pin INT1 is connected to the request transmission pin BRTS; the external interrupt output pin INT0 is connected to the clear-to-send BCTS; the first power supply pin Vcc is connected to the power supply output end VOUT;
the third, fourth and fifth grounding pins GND are respectively connected with a power ground; the power supply pin VDDZ is connected to the power supply output terminal VOUT.
The power supply module 4 further comprises a resistor R4 and a resistor R5; the data analysis and processing module 3 further comprises a power supply voltage measurement pin SCLK; one end of the resistor R4 is connected to the output end of the power switch S1; the other end of the resistor R4 and one end of the resistor R5 are connected in parallel and then connected to the power supply voltage measurement pin SCLK; the other end of the resistor R5 is connected to the power ground. Therefore, the voltage of the battery is measured through the resistors R4 and R5, so that in specific implementation, the current battery capacity can be displayed on the rotating speed measuring device, the battery capacity is conveniently checked, and the use is convenient.
The power module 4 further comprises a capacitor C5, a capacitor C1, a capacitor C3, a resistor R6 and a resistor R2; the voltage stabilizing chip further comprises a bypass pin BYP; the bypass pin BYP is connected to one end of the capacitor C5, and the other end of the capacitor C5 is connected to a power ground; one end of the resistor R2 is connected in parallel with the enable pin EN and the power input end VIN, and the other end of the resistor R2, one end of the capacitor C1, one end of the capacitor C3 and one end of the resistor R6 are connected in parallel and then connected to the power output end VOUT; the other end of the resistor R6 is connected to a working state indication pin CMPO; the other end of the capacitor C1 and the other end of the capacitor C3 are connected in parallel and then connected with a power ground. Through setting up electric capacity C5, electric capacity C1, electric capacity C3 play the cushioning effect for the electric quantity is more stable, strengthens steady voltage function.
The power supply module further comprises a light emitting diode LD 1; the anode of the light-emitting diode LD1 is connected to the other end of the resistor R6; the cathode of the led LD1 is connected to the operation status indication pin CMPO. The rotating speed measuring device has the function of an indicator lamp through the light emitting diode LD1, when the rotating speed measuring device works, the light emitting diode LD1 is lightened to indicate that the rotating speed measuring device works, and when the light emitting diode LD1 is not lightened to indicate that the rotating speed measuring device is in a closed state, so that the rotating speed measuring device is convenient to use.
The circuit also comprises a resistor R3, a resistor R1, a capacitor C4 and a capacitor C2; one end of the resistor R3 is connected to the power output terminal VOUT, and the other end of the resistor R3 and one end of the capacitor C4 are respectively connected to one end of the photo-receiving tube; the other end of the photoelectric receiving tube is connected with the other end of the capacitor C4 in parallel and then is connected with a power ground; one end of the resistor R1 is connected to one end of the photoemissive tube, and the other end of the resistor R1 is connected in parallel with one end of the capacitor C2 and then connected to the power output terminal VOUT; the other end of the capacitor C2 and the other end of the photoelectric emission tube are connected in parallel and then connected with a power ground. The photoelectric sensor 1 is subjected to current-limiting protection through the resistor R3 and the resistor R1, overload is prevented, meanwhile, the interference of noise waves to the photoelectric sensor 1 is reduced through filtering through the capacitor C4 and the capacitor C2, and measurement accuracy is improved.
In a specific embodiment, the frequency of the crystal oscillator crystal Y1 is 22.1184 HZ.
The voltage of battery is 9V, can adopt 9V rechargeable lithium cell in concrete implementation, and compatible non-rechargeable 9V battery simultaneously makes things convenient for purchase, carries and uses, and the size is about: 26mm 18mm 48mm, for example, the cell type is: DP-9V650 mAh; the designed power supply circuit is responsible for converting a 9V power supply into a 3.0V working power supply and managing the power supply, and comprises under-voltage, overload, short-circuit alarm prompt and the like, the miniature power supply module 8 provides power guarantee for the photoelectric sensor 1, the signal acquisition and processing module 2, the data analysis and processing module 3 and the Bluetooth module 5, and the wireless digital rotating speed measuring device can be ensured to normally and continuously work for about 7-9 hours under the condition of starting the low-power Bluetooth. The voltage output by the voltage stabilizing chip is 3V.
The Texas instrument CC2640 device is adopted, integrates the Bluetooth module 5 and the MCU microprocessor 3 into a whole and carries out data communication through Bluetooth signals, has the advantages of small volume, ultra-low power consumption and the like, is very suitable for the application of a small-volume control system powered by a battery, and can carry out secondary development of programs according to the requirements of users, including calculation of rotating speed and rotating times and the like.
The photoelectric sensor 1 adopts the existing reflective groove-shaped photoelectric switch ITR20001/T, consists of an IR receiving tube (IR2424-3C) and a PT transmitting tube (PT2424-7B), has the advantages of long service life, high reliability, high response speed, high sensitivity and the like, and provides guarantee for the accurate measurement of the rotating speed and the rotating speed;
the model of the voltage stabilizing chip is MIC5205-3.0YM 5; the model of the Bluetooth module is 4044B 2; the model of the power switch S1 is SW-ZS 6; the signal acquisition and processing module 2 adopts a pulse shaping chip 2 with the model 74LVC 1G 04.
The working principle is as follows: the rotation speed measurement can be performed under no load or load condition, before the measurement, the reflective material 9 is fixed at a proper position of the rotating part of the rotating object 8, that is, as long as no interference is generated on the rotation, the rotation speed measurement device is fixed at a proper position near the rotating part of the rotating object 8, even if the photosensitive part of the photoelectric sensor 1 is aligned with the reflective material 9 on the rotating part of the rotating object 8, the light emitted by the photoelectric emission tube 12 is reflected by the reflective material 9 and then received by the photoelectric receiving tube 11, the rotating object 8 and the rotation speed measurement device are turned on to be in a working state, when the rotating object 8 normally works, that is, after the rotation speed of the rotating object 8 is stabilized, and the rotating object rotates at a constant speed, the photoelectric emission tube 12 emits a light signal which is reflected by the reflective material 9 and then received by the photoelectric receiving tube 11, the signal collecting and processing module 2 performs level conversion, jitter elimination, filtering, direction identification on the photoelectric pulse signal collected by the photoelectric sensor 1, and sends the photoelectric pulse signal to the data analyzing and processing module 3 to perform speed calculation and processing to obtain a rotation speed value, for example, the photoelectric pulse signal reflected back by the photoelectric sensor 1 indicates that the rotating animal 8 rotates for one circle, the photoelectric pulse signal is transmitted to the data analyzing and processing module 3, and corresponding sampling time provided by the crystal oscillator module is collected and recorded, when the photoelectric sensor 1 receives the reflected optical pulse signal for the second time, the sampling time point for the second time is collected and recorded, the sampling time of the two times is subtracted to obtain a time interval, then the rotation speed of the rotating animal is obtained by dividing the rotation number of the rotating animal 8 in the time interval by the time interval, and the digital signal generated by the data analyzing and processing module 3 is output in a wireless transmission mode through the bluetooth module 5, the bluetooth module 5 receives the rotation speed data and provides the rotation speed data to an upper computer, for example, the upper computer is a notebook computer, a tablet computer, a mobile phone, etc., and records and reports are formed through corresponding data processing software of the upper computer 10, and related data are transmitted to a server through a network so as to be convenient for inquiry and modification. The host computer can issue an instruction through data processing software, the Bluetooth module 5 receives the instruction and transmits the instruction to the data analysis and processing module 3 in a wireless transmission mode, and the data analysis and processing module performs corresponding parameter setting according to the instruction. For example, the upper computer writes the program into the data analysis and processing module through the communication port 7 of the data line.
Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.
Claims (10)
1. The utility model provides a rotational speed measuring device based on photoelectric sensor, includes photoelectric sensor, its characterized in that: the system also comprises a signal acquisition and processing module, a data analysis and processing module, a power supply module, a Bluetooth module and a crystal oscillator module;
the photoelectric sensor is connected with the signal acquisition and processing module; the signal acquisition and processing module, the Bluetooth module, the crystal oscillator module and the power supply module are respectively connected to the data analysis and processing module;
the photoelectric sensor measures the rotating speed of a rotating object, converts a rotating speed signal of the rotating object into a photoelectric pulse signal and sends the photoelectric pulse signal to the signal acquisition and processing module; the signal acquisition and processing module carries out level conversion, amplification, jitter elimination, filtering and direction identification on the photoelectric pulse signal, then transmits the photoelectric pulse signal to the data analysis and processing module, simultaneously the crystal oscillator module provides a basic clock signal for the data analysis and processing module, and the data analysis and processing module reads sampling time; the data analysis and processing module analyzes the photoelectric pulse signal and calculates and processes the photoelectric pulse signal by combining sampling time to obtain a rotating speed value; the Bluetooth module wirelessly transmits the rotating speed digital signals generated by the data analysis and processing module to the upper computer in a wireless transmission mode.
2. A rotation speed measuring device based on a photoelectric sensor according to claim 1, wherein: the signal acquisition and processing module, the data analysis and processing module, the power supply module, the Bluetooth module and the crystal oscillator module are integrated into a whole.
3. A rotation speed measuring device based on a photoelectric sensor according to claim 1 or 2, characterized in that: the data analysis and processing module is an MCU microprocessor, and the signal acquisition and processing module is a pulse shaping chip.
4. A rotation speed measuring device based on a photoelectric sensor according to claim 3, wherein: the data analysis and processing module comprises a working state indication pin CMPO, a power supply voltage measurement pin SCLK, a crystal oscillator pin XTAL2, a crystal oscillator pin XTAL1, a first power supply pin Vcc, a first ground pin GND, a signal input pin CCPO, an external interrupt output pin INT3/TxD _2, an external interrupt input pin INT2/RxD _2, a timer external input pin T0CLKO, a timer external input pin T0/ECI, an external interrupt output pin INT1 and an external interrupt output pin INT 0;
the signal acquisition and processing module comprises a signal output end Y, a second power supply pin VCC, a signal input end A and a second grounding pin GND;
the photoelectric sensor comprises a photoelectric receiving tube and a photoelectric emitting tube;
the Bluetooth module comprises a third grounding pin GND, a power supply pin VDDZ, a reset pin RES _ N, an input/output pin P06, a fourth grounding pin GND, a fifth grounding pin GND, a data receiving pin RX, a data output pin TX, a clear-to-send BCTS and a request-to-send pin BRTS;
the crystal oscillator module comprises a capacitor C6, a capacitor C7 and a crystal oscillator crystal Y1;
the power supply module comprises a battery, a power switch S1 and a voltage stabilizing chip; the voltage stabilizing chip comprises a power input end VIN, a power output end VOUT, a sixth grounding pin GND and an enable pin EN;
the negative electrode of the battery is connected with a power ground; the positive pole of the battery is connected with the input end of a power switch S1; the first grounding pin GND is connected with a power ground; the enable pin EN is connected in parallel with the power input end VIN and then connected to the output end of the power switch S1; the power output terminal VOUT is connected to the working state indication pin CMPO;
one ends of the capacitor C6 and the capacitor C7 are connected in parallel and then are connected with a power ground; the other end of the capacitor C6 is connected with one end of the crystal oscillator crystal Y1 after being connected with the crystal oscillator pin XTAL2 in parallel; the other end of the capacitor C7 is connected with a crystal oscillator pin XTAL1 in parallel and then is connected with the other end of the crystal oscillator crystal Y1;
one end of the photoelectric emission tube is connected with the power output end VOUT, and the other end of the photoelectric emission tube is connected with a power ground; one end of the photoelectric receiving tube is connected to the signal input end A, and the other end of the photoelectric receiving tube is connected to a power ground;
the second grounding pin GND is connected with a power ground; the signal output end Y is connected with the signal input pin CCPO; the second power supply pin VCC is connected with the power supply output terminal VOUT;
the external interrupt output pin INT3/TxD _2 is connected to the data receive pin RX; the external interrupt input pin INT2/RxD _2 is connected to the data output pin TX; the timer external input pin T0CLKO is connected to the input/output pin P06; the timer external input pin T0/ECI is connected to the reset pin RES _ N; the external interrupt output pin INT1 is connected to the request transmission pin BRTS; the external interrupt output pin INT0 is connected to the clear-to-send BCTS; the first power supply pin Vcc is connected to the power supply output end VOUT;
the third, fourth and fifth grounding pins GND are respectively connected with a power ground; the power supply pin VDDZ is connected to the power supply output terminal VOUT.
5. A rotation speed measuring device based on a photoelectric sensor according to claim 4, characterized in that: the power supply module further comprises a resistor R4 and a resistor R5; the data analysis and processing module further comprises a power supply voltage measurement pin SCLK; one end of the resistor R4 is connected to the output end of the power switch S1; the other end of the resistor R4 and one end of the resistor R5 are connected in parallel and then connected to the power supply voltage measurement pin SCLK; the other end of the resistor R5 is connected to the power ground.
6. A rotation speed measuring device based on a photoelectric sensor according to claim 5, characterized in that: the power supply module further comprises a capacitor C5, a capacitor C1, a capacitor C3, a resistor R6 and a resistor R2; the voltage stabilizing chip further comprises a bypass pin BYP; the bypass pin BYP is connected to one end of the capacitor C5, and the other end of the capacitor C5 is connected to a power ground; one end of the resistor R2 is connected in parallel with the enable pin EN and the power input end VIN, and the other end of the resistor R2, one end of the capacitor C1, one end of the capacitor C3 and one end of the resistor R6 are connected in parallel and then connected to the power output end VOUT; the other end of the resistor R6 is connected to a working state indication pin CMPO; the other end of the capacitor C1 and the other end of the capacitor C3 are connected in parallel and then connected with a power ground.
7. A rotation speed measuring device based on a photoelectric sensor according to claim 6, characterized in that: the power supply module further comprises a light emitting diode LD 1; the anode of the light-emitting diode LD1 is connected to the other end of the resistor R6; the cathode of the led LD1 is connected to the operation status indication pin CMPO.
8. A rotation speed measuring device based on a photoelectric sensor according to claim 4, characterized in that: the circuit also comprises a resistor R3, a resistor R1, a capacitor C4 and a capacitor C2; one end of the resistor R3 is connected to the power output terminal VOUT, and the other end of the resistor R3 and one end of the capacitor C4 are respectively connected to one end of the photo-receiving tube; the other end of the photoelectric receiving tube is connected with the other end of the capacitor C4 in parallel and then is connected with a power ground; one end of the resistor R1 is connected to one end of the photoemissive tube, and the other end of the resistor R1 is connected in parallel with one end of the capacitor C2 and then connected to the power output terminal VOUT; the other end of the capacitor C2 and the other end of the photoelectric emission tube are connected in parallel and then connected with a power ground.
9. A rotation speed measuring device based on a photoelectric sensor according to claim 4, characterized in that: the frequency of the crystal oscillator crystal Y1 is 22.1184 HZ.
10. A rotation speed measuring device based on a photoelectric sensor according to claim 4, characterized in that: the voltage of the battery is 9V.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174523A (en) * | 2019-05-28 | 2019-08-27 | 福建省计量科学研究院（福建省眼镜质量检验站） | A kind of rotation-speed measuring device based on photoelectric sensor |
| CN114705232A (en) * | 2022-03-16 | 2022-07-05 | 南京苏试广博环境可靠性实验室有限公司 | Singlechip infrared photoelectric speed measuring system |
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2019
- 2019-05-28 CN CN201920783700.0U patent/CN210243677U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174523A (en) * | 2019-05-28 | 2019-08-27 | 福建省计量科学研究院（福建省眼镜质量检验站） | A kind of rotation-speed measuring device based on photoelectric sensor |
| CN114705232A (en) * | 2022-03-16 | 2022-07-05 | 南京苏试广博环境可靠性实验室有限公司 | Singlechip infrared photoelectric speed measuring system |
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