CN117631570A - Low-power-consumption device rotation speed sensing system and method - Google Patents
Low-power-consumption device rotation speed sensing system and method Download PDFInfo
- Publication number
- CN117631570A CN117631570A CN202210959749.3A CN202210959749A CN117631570A CN 117631570 A CN117631570 A CN 117631570A CN 202210959749 A CN202210959749 A CN 202210959749A CN 117631570 A CN117631570 A CN 117631570A
- Authority
- CN
- China
- Prior art keywords
- speed sensing
- wireless transmission
- signal
- unit
- square wave
- 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
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 97
- 238000012545 processing Methods 0.000 claims abstract description 51
- 230000000630 rising effect Effects 0.000 claims abstract description 39
- 238000004891 communication Methods 0.000 claims abstract description 29
- 238000007493 shaping process Methods 0.000 claims abstract description 23
- 230000001960 triggered effect Effects 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 230000007958 sleep Effects 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 21
- 230000003993 interaction Effects 0.000 claims description 9
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 239000000523 sample Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a low-power-consumption equipment rotating speed sensing system and a method. The equipment rotating speed sensing system comprises a rotating speed sensing unit and a signal processing and wireless transmission unit which are in communication connection, wherein the rotating speed sensing unit is configured to sense a magnetic signal of a leakage magnetic field of equipment, convert the magnetic signal into an analog electric signal and transmit the analog electric signal to the signal processing and wireless transmission unit; the signal processing and wireless transmission unit comprises a shaping circuit, a microcontroller unit and a wireless transmission module; wherein the shaping circuit is configured to shape the analog electrical signal from the rotational speed sensing unit into a square wave signal; wherein the microcontroller unit is configured to be in a normally dormant state and is triggered to wake up to record data upon detection of a rising or falling edge of a square wave, and subsequently dormant until triggered again upon detection of a rising or falling edge of a next square wave.
Description
Technical Field
The present invention relates to the field of device speed sensing, and more particularly to a low power consumption motor speed sensing system and method.
Background
In the field of sensing of equipment working conditions, particularly motor running states, one important link is real-time measurement of the rotational speed of a motor during running, i.e. the sensor is used for sensing the motor, and periodic changes of some parameters during rotation of a motor rotor are measured to obtain the real-time rotational speed of the motor. The sensing technology involved in the existing equipment rotating speed sensing system mostly uses an eddy current proximity switch converter, wherein the eddy current proximity switch converter consists of an inductance coil, a capacitor and a transistor and generates an alternating magnetic field, when a metal object approaches the alternating magnetic field, eddy current is generated in the metal object, and therefore oscillation is stopped. The change is amplified in the subsequent stage, converted into a transistor switching signal, and the pulse signal is detected to measure the rotation speed.
At present, the current vortex type proximity switch has great limitation in practical engineering installation application, mainly needs equipment to stop and install a conductor trigger block, and has the advantages of large trigger distance adjustment difficulty, high failure rate and the like. In addition, the proximity switch must be installed at a specific position on a rotating member such as a rotating shaft, etc., so that it is inconvenient to install and debug and brings challenges such as damage and even accidents if the installation and debugging operations are improper. In addition, eddy current proximity switch sensors typically require long distance leads, which are also construction difficulties and failure points.
Based on the foregoing, there is an urgent need for improved ultra-low power consumption wireless motor speed sensing systems and sensing methods to mitigate or even eliminate the above-mentioned technical drawbacks and other technical drawbacks, to improve the robustness of the sensing systems, the reliability of the devices and methods, to improve the user friendliness and safety of use, operation and maintenance, to improve the cost efficiency, and so on.
The information included in this background section of the specification of the present invention, including any references cited herein and any descriptions or discussions thereof, is included solely for the purpose of technical reference and is not to be construed as a subject matter that would limit the scope of the present invention.
Disclosure of Invention
The present invention has been developed in view of the above and other further concepts.
According to the conception of one aspect of the invention, the motor magnetic leakage induction principle is adopted, so that the motor can be arranged at a non-specific position in a non-contact manner, the installation difficulty can be effectively reduced, the failure rate is lower, and the maintenance cost is lower. In contrast, the proximity switch must be installed at a specific position of a rotating member such as a rotating shaft or the like.
More specifically, according to another aspect of the present invention, there is provided a low power consumption device rotation speed sensing system including a rotation speed sensing unit and a signal processing and wireless transmission unit in communication connection, wherein the rotation speed sensing unit is configured to sense a magnetic signal of a leakage magnetic field of the device and convert it into an analog electric signal, and transmit the analog electric signal to the signal processing and wireless transmission unit; the signal processing and wireless transmission unit comprises a shaping circuit, a microcontroller unit MCU and a wireless transmission module; wherein the shaping circuit is configured to shape the analog electrical signal from the rotational speed sensing unit into a square wave signal; and wherein the microcontroller unit MCU is configured to be in a normally dormant state and to be triggered to wake up to record data upon detection of a rising or falling edge of the square wave, and subsequently to be dormant until the next rising or falling edge of the square wave is detected to be triggered to wake up again.
According to an embodiment of the low power device speed sensing system, the micro-controller unit MCU is configured to trigger wake-up only when a rising or falling edge of the square wave is detected to record data, and then immediately sleep, and to trigger wake-up again until a next rising or falling edge of the square wave is detected.
According to an embodiment of the low-power-consumption device rotation speed sensing system, the rotation speed sensing unit is in communication connection with the signal processing and wireless transmission unit through a short cable.
According to an embodiment of the low-power-consumption device rotation speed sensing system, the rotation speed sensing unit and the signal processing and wireless transmission unit are positioned at positions capable of effectively sensing a leakage magnetic field of the device.
According to an embodiment of the low power device rotational speed sensing system, the device is a motor and the rotational speed sensing unit is a magneto-sensitive sensor.
According to an embodiment of the low-power-consumption device rotation speed sensing system, the rotation speed sensing unit is provided with a magnetic field sensing chip and a filtering amplifying circuit, wherein the magnetic field sensing chip is configured to sense a leakage magnetic field of the device, convert a sensed magnetic field signal into an analog electric signal and output the analog electric signal to the filtering amplifying circuit; and the filtering and amplifying circuit is used for filtering and amplifying the analog electric signal, and the rotating speed sensing unit outputs the filtered and amplified analog electric signal to the signal processing and wireless transmission unit.
According to an embodiment of the low power consumption device rotation speed sensing system, the MCU is configured to record a real time clock RTC value of a rising edge or a falling edge of the square wave and calculate a difference value of RTC values of two adjacent rising edges or falling edges, thereby further calculating a rotation speed value of the device.
According to an embodiment of the low power consumption device rotation speed sensing system, the wireless transmission module is a wireless communication module configured to send the rotation speed related data or instructions.
According to an embodiment of the low power consumption device rotation speed sensing system, the filtering and amplifying circuit comprises a high-pass filter, a low-pass filter, a nonlinear amplifier and an integrating amplifier which are electrically connected in sequence, wherein the high-pass filter receives an analog electric signal from the magnetic field sensing chip, the shaping circuit receives an amplified analog signal from the integrating amplifier and shapes the amplified analog signal into a square wave signal, and the microcontroller unit receives the square wave signal input from the square wave shaping circuit.
According to an embodiment of the low-power device rotation speed sensing system, the wireless transmission module is selected from at least one of a Zigbee module, a WiFi module, a bluetooth module, a LoRa transmission module, an NB transmission module, a Proprietary transmission module, a Thread transmission module, a Wi-SUN transmission module, a Z-Wave transmission module, and an infrared communication module.
According to an embodiment of the low power consumption device rotation speed sensing system, the wireless communication module is configured to be controlled by the microcontroller unit MCU to be started at a timing for data interaction, wherein the timing is set so that the wireless communication module achieves low power consumption.
According to an embodiment of the low-power-consumption device rotation speed sensing system, the rotation speed sensing unit and the signal processing and wireless transmission unit are integrally configured.
According to an embodiment of the low-power-consumption device rotation speed sensing system, the low-power-consumption device rotation speed sensing system uses a self-charging battery as a working power supply.
According to an embodiment of the low-power-consumption device rotation speed sensing system, the rotation speed sensing unit and/or the signal processing and wireless transmission unit is/are provided with a working power supply.
According to an embodiment of the low-power-consumption device rotation speed sensing system, the magnetic field sensing chip is configured to be in communication connection with the filtering and amplifying circuit, the filtering and amplifying circuit is configured to be in communication connection with the shaping circuit, the shaping circuit is configured to be in communication connection with the MCU, and the MCU is configured to be in communication connection with the wireless transmission module.
According to another aspect of the present invention, there is also provided a method for performing device rotation speed sensing in a low power consumption manner using a device rotation speed sensing system including a rotation speed sensing unit and a signal processing and wireless transmission unit in communication connection, wherein the signal processing and wireless transmission unit includes a shaping circuit, a microcontroller unit MCU and a wireless transmission module; the method comprises the following steps: the magnetic signals of the leakage magnetic field of the equipment are sensed by the rotating speed sensing unit and converted into analog electric signals, and the analog electric signals are transmitted to the signal processing and wireless transmission unit; shaping the analog electrical signal from the rotational speed sensing unit into a square wave signal by the shaping circuit; and triggering to wake up the micro controller unit MCU to record data when the rising edge or the falling edge of the square wave is detected, and then enabling the micro controller unit MCU to immediately sleep, and triggering to wake up the micro controller unit MCU again until the rising edge or the falling edge of the next square wave is detected; wherein the microcontroller unit MCU is configured to be in a normally dormant state and to be triggered to wake up to record data upon detection of a rising or falling edge of the square wave.
According to an embodiment of the method for performing device rotation speed sensing, the microcontroller unit MCU controls to start the wireless transmission module at regular time to perform the signal processing and the data interaction between the wireless transmission unit and the host computer, and after the data interaction is finished, the microcontroller unit MCU controls to cut off the power supply until the next data interaction.
According to an embodiment of the above method for performing device rotation speed sensing, the wireless transmission module is a wireless communication module, and the timed time interval is set to be low power consumption when the wireless communication module sends data to the upper computer.
According to an embodiment of the method for performing device rotation speed sensing, the rotation speed sensing unit and the signal processing and wireless transmission unit are positioned at a position on the device where a leakage magnetic field can be sensed.
According to an embodiment of the above method of performing rotational speed sensing of a device, the device is an electric motor and the rotational speed sensing unit is a magneto-sensitive sensor.
According to an embodiment of the method for performing rotational speed sensing of a device, the rotational speed sensing unit is provided with a magnetic field sensing chip and a filtering amplifying circuit, wherein the magnetic field sensing chip is configured to sense a leakage magnetic field of the device, and convert a sensed magnetic field signal into an analog electrical signal and output the analog electrical signal to the filtering amplifying circuit; and wherein the analog electric signal is filtered and amplified by the filtering and amplifying circuit, and the filtered and amplified analog electric signal is output to the signal processing and wireless transmission unit by the rotation speed sensing unit.
According to an embodiment of the method for performing device rotation speed sensing, the MCU records the real-time clock RTC value of the rising edge or the falling edge of the square wave and calculates the difference between the RTC values of the rising edge or the falling edge of two adjacent times, thereby further calculating the rotation speed value of the device.
Further embodiments of the invention also enable other advantageous technical effects, not listed one after another, which may be partly described below and which are anticipated and understood by a person skilled in the art after reading the present invention.
Drawings
To the accomplishment of the foregoing and related ends, certain illustrative aspects are described herein in connection with the following description and the annexed drawings, which set forth various ways in which the disclosed principles may be practiced, and all such aspects and equivalents thereof are intended to fall within the scope of the claimed subject matter.
The above-mentioned and other features and advantages of these embodiments, and the manner of attaining them, will become more apparent and the embodiments of the invention will be better understood by reference to the following description taken in conjunction with the accompanying drawings.
FIG. 1 is a system flow diagram of a low power consumption device speed sensing system according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a microcontroller unit MCU according to an embodiment of the present application triggered to wake up on a rising or falling edge of a square wave.
Fig. 3 is a schematic diagram of a sensor probe of a rotation speed sensing unit according to an embodiment of the present application in communication connection with a signal processing and wireless transmission unit through a cable.
Fig. 4 is a block diagram showing a specific structure of a signal processing and wireless transmission unit according to an embodiment of the present application.
Fig. 5 is a schematic flowchart of the operation of the MCU for sleep setting and sleep exit according to an embodiment of the present application.
Detailed Description
The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will be apparent from the description and drawings, and from the claims.
It is to be understood that the illustrated and described embodiments are not limited in application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The illustrated embodiments may be other embodiments and can be implemented or performed in various ways. Examples are provided by way of explanation, not limitation, of the disclosed embodiments. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made to the various embodiments of the invention without departing from the scope or spirit of the disclosure. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield still a further embodiment. Accordingly, the present disclosure is intended to cover such modifications and variations as fall within the scope of the appended claims and their equivalents.
Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items.
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein.
According to one or more embodiments of the present application, the low power consumption device rotation speed sensing system and method of the present invention may employ a leakage flux speed sensing method, which may be advantageously adapted to sense the rotation speed of a rotating device such as a motor. The rotating equipment such as the motor and the like comprises a magnetic element, the magnetic element can rotate along with the rotating equipment, and the rotating magnetic field can change along with the rotation of the magnetic element. The rotating magnetic field inside the rotating equipment such as the motor leaks, and a leakage magnetic field is formed. The rotational frequency of the leakage magnetic field is related to the mechanical rotational frequency, whereby the leakage velocity measurement can be used to measure the rotational speed.
The non-contact measurement is carried out by using the equipment rotating speed sensing system with low power consumption, and the difficult problem that the rotating part of the motor is not exposed and the rotating speed cannot be measured is solved by adopting the induction type measurement principle. Furthermore, the sensing unit and the signal processing and wireless transmission unit may be positioned at a fixed location and have no components that rotate with the mechanical shaft, thus providing advantages in terms of their maintenance, replacement, diagnostics, and operational reliability.
The motor operation state sensing system of low power consumption of the present invention may include a rotation speed sensing unit capable of sensing a magnetic signal of leakage of a rotating magnetic field of a device of a rotary machine such as a direct current motor, a synchronous motor, an asynchronous motor, etc., and converting it into an analog electric signal.
FIG. 1 is a system flow diagram of a low power consumption device speed sensing system according to an embodiment of the present application. The low-power-consumption equipment rotating speed sensing system mainly comprises a rotating speed sensing unit and a signal processing and wireless transmission unit. The rotating speed sensing unit comprises a magnetic field sensing sensitive chip and a filtering amplifying circuit, wherein the magnetic field sensing chip can be used for sensing a leakage magnetic field of equipment, converting sensed magnetic field signals into analog electric signals and outputting the analog electric signals to the filtering amplifying circuit; the filter amplification circuit may be used to filter and amplify the analog electrical signal. The signal processing and wireless transmission unit may include a shaping circuit, a microcontroller unit (MCU), and a wireless transmission module. The shaping circuit is configured to shape the analog electrical signal from the magneto-dependent sensor into a square wave signal. The microcontroller unit MCU may be configured to be in a normally sleep state and to be triggered to wake up only when a rising or falling edge of a square wave is detected to record data, and then to sleep immediately, and to be triggered to wake up again until a rising or falling edge of the next square wave is detected. The microcontroller unit MCU may also use an algorithm to convert the data recorded by the wake-up triggered into mechanical rotational speed. By such a configuration and design, the power consumption of the rotation speed sensing system can be reduced as much as possible.
The wireless transmission module is configured to transmit data or instructions related to the rotational speed and may be a wireless communication module. The wireless transmission module may be selected from at least one of a Zigbee module, a WiFi module, a bluetooth module, a LoRa transmission module, an NB transmission module, a Proprietary transmission module, a Thread transmission module, a Wi-SUN transmission module, a Z-Wave transmission module, and an infrared communication module. The wireless communication module may be configured to be activated by the micro controller unit MCU for data interaction with the timing being set such that the wireless communication module achieves low power consumption, i.e. power consumption is reduced as much as possible, e.g. by extending the period of transmission as much as possible, using a low power consumption transmission mode, etc.
The low-power-consumption device rotation speed sensing system according to an embodiment of the present application may have a self-contained working power supply, and the rotation speed sensing unit and/or the signal processing and wireless transmission unit may also have a self-contained working power supply. Of course, these units can also be externally connected with a power supply, which can be flexibly set according to the requirements.
When the rotating speed sensing is carried out, firstly, the magnetic signal of the leakage magnetic field of the equipment can be sensed through the magnetic field sensing chip of the rotating speed sensing unit and converted into an analog electric signal, and then the analog electric signal can be transmitted to the signal processing and wireless transmission unit. The analog electrical signal from the rotation speed sensing unit can then be shaped into a square wave signal by a shaping circuit of the signal processing and wireless transmission unit, and the square wave signal can be delivered to the microcontroller unit MCU. Upon detection of a rising or falling edge of a square wave, the wake-up microcontroller unit MCU may be triggered to record data, and may then be immediately dormant until the rising or falling edge of the next square wave is detected.
In this embodiment, the micro-controller unit MCU may be configured to be in a normally sleep state and may be triggered to wake up to record data only when a rising or falling edge of a square wave is detected.
In one embodiment, the rotating machine may be, for example, an electric motor, the rotational speed of which is to be sensed, and the rotational speed sensing unit used may in particular be a magneto-sensor. The rotation speed sensing unit and the signal processing and wireless transmission unit can be positioned at a position capable of effectively sensing the leakage magnetic field of the equipment and can be positioned at a fixed position on the equipment except for the rotating part.
The equipment rotating speed sensing system specifically comprises a magneto-sensitive sensor and a signal processing and wireless transmission unit which are in communication connection. The magneto-dependent sensor can be in communication connection with the signal processing and wireless transmission unit through a cable. The magneto-dependent sensor may be configured in particular to sense and convert magnetic signals of the leakage magnetic field of the device into analog electrical signals and to transmit the analog electrical signals to the signal processing and wireless transmission unit.
Fig. 2 is a schematic diagram of a microcontroller unit MCU according to an embodiment of the present application triggered to wake up on the rising edge of a square wave.
In one embodiment of the invention, a magnetic field sensing chip and a filtering amplifying circuit can be arranged in the rotating speed sensing unit, wherein the magnetic field sensing chip can be used for sensing a leakage magnetic field of equipment and converting a sensed magnetic field signal into an analog electric signal and outputting the analog electric signal to the filtering amplifying circuit; the filtering and amplifying circuit can be used for filtering and amplifying the analog electric signal, and then the rotation speed sensing unit can output the filtered and amplified analog electric signal to the signal processing and wireless transmission unit.
The leakage of the rotating magnetic field may also be periodically varied, so that the signal sensed by the magneto-dependent sensor may also be periodically varied. The MCU may typically use an external interrupt to generate a wake trigger event during sleep. After receiving the event, the MCU can be separated from the dormant state and enter the running state. At this time, the MCU can immediately read the current value T of the real-time clock RTC n Then can be matched with the last value T n-1 The period of the rotating magnetic field can be obtained by subtraction, the reciprocal of the period is the frequency, the frequency can be equal to or related to the rotating speed of the rotating machine, and the frequency can be converted into the rotating speed of the machine through a certain algorithm. The MCU for the run state may set a condition (e.g., external rising edge interrupt) to exit the run state and go to sleep, and then may enter a low power sleep state. Thus, compared with the conventional rotation speed sensor with the MCU in a normally-on state, the signal processing and absence according to the embodiment are contemplatedThe wire transfer unit may have lower power consumption, particularly in the case where the device rotational speed sensing system uses a self-contained power source such as a battery, which can significantly extend the life cycle and lifetime of the sensor.
The MCU can record the real-time clock RTC value of the rising edge or the falling edge of the square wave and calculate the difference value of the RTC values of the rising edge or the falling edge of two adjacent times, thereby further calculating the rotating speed value of the equipment.
Likewise, the micro-controller unit MCU may also trigger the wake-up of the micro-controller unit MCU to record data when the falling edge of the square wave is detected, and may then immediately sleep the micro-controller unit MCU until the next falling edge of the square wave is detected. In this embodiment, the micro-controller unit MCU is configured to be in a normally sleep state and is triggered to wake up to record data only when a falling edge of a square wave is detected. In this case, the MCU may record the real time clock RTC value of the falling edge of the square wave and may calculate the difference between the RTC values of the two adjacent falling edges, thereby further calculating the rotational speed value of the device.
Fig. 3 shows an example in which the rotation speed sensing unit 1 is in communication with the signal processing and wireless transmission unit 2 via a cable 3 according to an embodiment of the present application. When the rotation speed sensing unit 1 and the signal processing and wireless transmission unit 2 of the low-power-consumption device rotation speed sensing system need to be separated from each other by a certain distance according to needs, the low-power-consumption device rotation speed sensing system can be a split system. The rotation speed sensing unit 1 can be in communication connection with the signal processing and wireless transmission unit 2 through the cable 3, so that the rotation speed sensing unit 1 and the signal processing and wireless transmission unit 2 are arranged separately.
Fig. 4 is a block diagram showing a specific structure of a signal processing and wireless transmission unit according to an embodiment of the present application. The signals collected by the sensor, for example the rotation speed sensing unit 1, can be transmitted to the signal processing and wireless transmission unit 2. The signal can be filtered by a high-pass filter and a low-pass filter in the signal processing and wireless transmission unit 2; the filtered signal can enter a nonlinear amplifier to amplify a weaker input signal with a large signal; the nonlinear amplified signal can enter an integrating amplifier to amplify the input signal; the further amplified signal may enter a squaring circuit where the input signal may be shaped into a square wave and input to a Micro Control Unit (MCU). After the square wave signal reaches the MCU, the rising edge or the falling edge of the square wave triggers the wake-up MCU to record data, and then the MCU can reenter the sleep state until the rising edge or the falling edge of the next square wave triggers the wake-up MCU again. The MCU may perform the calculation. The MCU can transmit the calculated result, namely the rotating speed data/value, to the wireless transmission module in a signal mode, and the wireless transmission module sends the rotating speed recording signal to the system. In addition, the power supply of the wireless transmission module can be controlled by the MCU, and the wireless transmission module can be in a dormant state when no signal is transmitted; when signal transmission is needed, the MCU wakes up the wireless transmission module, and then exchanges data with the MCU to perform actions such as wireless transmission.
Of course, the specific configuration of the signal processing and wireless transmission module is not limited to the above configuration, and may be adopted as long as the signal processing and wireless transmission functions in the embodiments of the present application can be realized.
Fig. 5 is a flowchart illustrating the operation of the MCU for sleep setup and sleep exit according to an embodiment of the present application. The working mode of the MCU can be preset in the system. In the system server main program, the MCU may be initialized first. The system can send out instructions through the wireless transmission module, can initialize the MCU, and then, the system can still interact with the wireless transmission module in a wireless communication manner to set the sleep mode of the MCU. The sleep mode of the MCU may be set to a timer interrupt mode, an external trigger mode, or the like, according to actual needs. In the timer interrupt mode, the MCU is to complete the loopback of data such as the rotational speed value measured in this period, the sensor status, etc., and receive possible parameter settings. In the external trigger mode, as described in detail in the embodiments of the present application, for example, the MCU is awakened by the rising edge or the falling edge of the square wave to record data, and after the MCU completes the recording action, the MCU may reenter sleep until the rising edge or the falling edge of the next square wave triggers to awaken the MCU again.
Since the MCU does not need to be in a standby state all the time in the above mode, it is excellent in energy saving, which is particularly advantageous in the case where the MCU or the like is powered by a battery.
The specific actions of the MCU after exiting sleep may be as follows:
after the MCU exits from dormancy, firstly judging whether the timing is interrupted, if the timing is interrupted, the MCU can perform timing communication interaction with the wireless transmission module, send back a rotating speed value, send back a running state of a sensor, receive new parameter settings and the like).
Then, the MCU continues to judge whether the interrupt is simultaneously triggered by the outside. If the timing is not interrupted, the MCU continues to judge whether the external trigger interruption comes from the trigger of the rising edge or the falling edge of the square wave signal at the present time, if the external trigger interruption exists, the current RTC value T is read n With the last pulse generation time RTC value T n-1 Phase operation, and so on. Finally, the MCU calculates the rotating speed and sends out the rotating speed through the wireless transmission module.
If the MCU judges that the timing is not interrupted and no external trigger interrupt occurs, the MCU automatically enters an abnormal processing flow, sends out an abnormal signal through the wireless transmission module and then enters a dormant state again.
In addition, according to actual needs, the MCU can always keep an awake state in a specific time period and monitor at any time. This particular time interval may be, for example, an empirically known time interval of high load operation of the monitored device, such as a time interval of higher rotational speed on average or a time interval of higher torque. In other time periods, the MCU can be in a dormant state, and is not awakened by signals obtained by monitoring the monitored equipment by the sensor, and is in a timing interruption mode relative to the mode of always being in. The action of the MCU after specifically exiting sleep can also be as described above.
In addition, the low-power-consumption device rotation speed sensing system according to an embodiment of the present application may also be an integrated system. The integrated low-power-consumption equipment rotating speed sensing system is more compact, a cable assembly for connecting the rotating speed sensing unit and the signal processing and wireless transmission unit in a split system is not needed, and the rotating speed sensing unit and the signal processing and wireless transmission unit are integrated into a whole.
The basic idea of the present invention is described above in connection with the embodiments. It is to be understood, however, that the foregoing is only illustrative of some of the embodiments of the invention and of the principles of the technology employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Accordingly, many other equivalent embodiments may be made without departing from the spirit of the invention, the scope of which is determined by the scope of the appended claims.
Claims (13)
1. A low-power consumption equipment rotation speed sensing system is characterized by comprising a rotation speed sensing unit and a signal processing and wireless transmission unit which are in communication connection,
the rotating speed sensing unit is configured to sense a magnetic signal of a leakage magnetic field of the equipment, convert the magnetic signal into an analog electric signal and transmit the analog electric signal to the signal processing and wireless transmission unit;
the signal processing and wireless transmission unit comprises a shaping circuit, a microcontroller unit and a wireless transmission module;
wherein the shaping circuit is configured to shape the analog electrical signal from the rotational speed sensing unit into a square wave signal; and
wherein the microcontroller unit is configured to be in a normally dormant state and to be triggered to wake up to record data upon detection of a rising or falling edge of the square wave, and subsequently to be dormant until the next rising or falling edge of the square wave is detected to be triggered to wake up again.
2. The low power device speed sensing system of claim 1, wherein the microcontroller unit is configured to be triggered to wake up only when a rising or falling edge of the square wave is detected to record data, and then immediately sleep until the next rising or falling edge of the square wave is detected.
3. The low power consumption device rotational speed sensing system of claim 1, wherein the device is a motor and the rotational speed sensing unit is a magneto-sensitive sensor.
4. The low power consumption device rotational speed sensing system of any preceding claim,
the rotating speed sensing unit is provided with a magnetic field sensing chip and a filtering amplifying circuit, wherein the magnetic field sensing chip is configured to sense a leakage magnetic field of the equipment, convert a sensed magnetic field signal into an analog electric signal and output the analog electric signal to the filtering amplifying circuit; and is also provided with
The filtering and amplifying circuit is used for filtering and amplifying the analog electric signals, and the rotating speed sensing unit outputs the filtered and amplified analog electric signals to the signal processing and wireless transmission unit.
5. The low power device rotational speed sensing system of claim 4, wherein the MCU is configured to record a real time clock RTC value of a rising or falling edge of the square wave and calculate a difference in RTC values of two adjacent rising or falling edges, thereby further calculating a rotational speed value of the device.
6. The low power consumption device rotational speed sensing system of claim 4, wherein the filtering amplification circuit comprises a high pass filter, a low pass filter, a non-linear amplifier, and an integrating amplifier electrically connected in sequence, wherein the high pass filter receives the analog electrical signal from the magnetic field sensing chip, the shaping circuit receives the amplified analog signal from the integrating amplifier and shapes it into a square wave signal, and the microcontroller unit receives the square wave signal input from the square wave shaping circuit.
7. The low power device rotation speed sensing system of claim 5, wherein the wireless transmission module is a wireless communication module configured to transmit data or instructions related to the rotation speed.
8. The low power consumption device rotation speed sensing system of any of the above claims, wherein the wireless transmission module is selected from at least one of a Zigbee module, a WiFi module, a bluetooth module, a LoRa transmission module, an NB transmission module, a Proprietary transmission module, a Thread transmission module, a Wi-SUN transmission module, a Z-Wave transmission module, and an infrared communication module.
9. The low power device rotational speed sensing system of any preceding claim, wherein the low power device rotational speed sensing system is self-contained as a working power source.
10. The low power consumption device rotational speed sensing system of any one of claims 4-7, wherein the magnetic field sensing chip is configured to be communicatively coupled to the filter amplifier circuit, the filter amplifier circuit is configured to be communicatively coupled to the shaping circuit, the shaping circuit is configured to be communicatively coupled to the MCU, and the MCU is configured to be communicatively coupled to the wireless transmission module.
11. The method for performing the equipment rotating speed sensing in a low-power consumption mode by utilizing the equipment rotating speed sensing system is characterized by comprising a rotating speed sensing unit and a signal processing and wireless transmission unit which are in communication connection, wherein the signal processing and wireless transmission unit comprises a shaping circuit, a microcontroller unit and a wireless transmission module;
the method comprises the following steps:
the magnetic signals of the leakage magnetic field of the equipment are sensed by the rotating speed sensing unit and converted into analog electric signals, and the analog electric signals are transmitted to the signal processing and wireless transmission unit;
shaping an analog electrical signal from the rotation speed sensing unit into a square wave signal by the shaping circuit; and
triggering to wake up the microcontroller unit to record data when the rising edge or the falling edge of the square wave is detected, and then enabling the microcontroller unit to immediately sleep, wherein the microcontroller unit is not triggered to wake up again until the rising edge or the falling edge of the next square wave is detected;
wherein the microcontroller unit is configured to be in a normally dormant state and to be triggered to wake up to record data upon detection of a rising or falling edge of the square wave.
12. The method of claim 11, wherein the step of determining the position of the probe is performed,
and the microcontroller unit controls the wireless transmission module to be started at fixed time so as to perform the signal processing and the data interaction between the wireless transmission unit and the upper computer, and after the data interaction is finished, the microcontroller unit controls the power supply to be cut off until the next data interaction.
13. The method according to claim 11 or 12, wherein,
recording the real-time clock RTC value of the rising edge or the falling edge of the square wave by the MCU, and calculating the difference value of the RTC values of the rising edge or the falling edge of two adjacent times, thereby further calculating the rotating speed value of the equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210959749.3A CN117631570A (en) | 2022-08-11 | 2022-08-11 | Low-power-consumption device rotation speed sensing system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210959749.3A CN117631570A (en) | 2022-08-11 | 2022-08-11 | Low-power-consumption device rotation speed sensing system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117631570A true CN117631570A (en) | 2024-03-01 |
Family
ID=90018552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210959749.3A Pending CN117631570A (en) | 2022-08-11 | 2022-08-11 | Low-power-consumption device rotation speed sensing system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117631570A (en) |
-
2022
- 2022-08-11 CN CN202210959749.3A patent/CN117631570A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8065546B2 (en) | Interrupt/wake-up of an electronic device in a low power sleep mode when detecting a sensor or frequency source activated frequency change | |
| CN107458418A (en) | self-powered train operation state monitoring system | |
| CN105738809A (en) | Monitoring device for temperature rise and vibration of motor and realizing method thereof | |
| US7248059B1 (en) | Low power sensor | |
| CN218298810U (en) | Low power consumption device speed sensing system | |
| CN117631570A (en) | Low-power-consumption device rotation speed sensing system and method | |
| CN208885546U (en) | A kind of big-diameter pipeline conveying pump group monitoring system | |
| CN103109386B (en) | For reducing equipment and the method for the energy ezpenditure in the monitoring component of multiple piezoelectric element | |
| CN205594139U (en) | Motor temperature rise and vibration monitoring devices | |
| CN116017339A (en) | Civil engineering structure safety monitoring and early warning system | |
| CN208820630U (en) | A kind of control system of permanent magnet synchronous motor | |
| KR101284793B1 (en) | Power metering devices and method for Retrench the power consumption using therefor | |
| RU2007101648A (en) | METHOD FOR MONITORING AND ACCOUNTING THE TIME OF OPERATION OF ELECTRIC POWER EQUIPMENT AND DEVICE FOR ITS IMPLEMENTATION | |
| CN116062583A (en) | Elevator brake failure protection device and system | |
| CN115396461B (en) | Trigger type vibration data acquisition system suitable for low-speed variable working conditions | |
| WO2001029783A2 (en) | Machine monitor | |
| RU216359U1 (en) | Device for converting magneto-inductive signals | |
| CN117979400A (en) | Wireless acquisition method and system for operation data of unsteady state equipment | |
| JPH10206199A (en) | Method and apparatus for automatically reading meter | |
| CN103996274B (en) | Ammeter is wireless reading device and method | |
| CN203908671U (en) | Ultra-miniature vibration counting sensor | |
| CN116818087A (en) | Self-powered wireless vibration sensor and method for improving working time of self-powered wireless vibration sensor | |
| CN117928737A (en) | Non-contact temperature detection device for dry-type transformer | |
| CN113267338A (en) | Low-power-consumption magnetic sensor detection device and power consumption control method for engine switch | |
| CN112987641A (en) | Wireless charging monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination |