Self-awakening monitoring device and monitoring system

Abstract

The invention relates to the field of self-awakening monitoring, in particular to a self-awakening monitoring device and system.The self-awakening monitoring device comprises a power generation and supply module, a sound wave detection module, a logic oscillation module, a communication awakening module and a sound source verification module, the power generation and supply module is used for providing electric energy for the device, and the sound wave detection module is used for independently packaging a power supply system and a communication system; the logic oscillation module is used for generating and modulating double-side induction voltage, so that simultaneous sound source induction voltage meets oscillation starting conditions, the communication awakening module is used for awakening the monitoring device, and the sound source verification module is used for measuring and calculating sound source coordinates. The detection definition and purity are improved, the accuracy and reliability of detection data are ensured, more refined monitoring and analysis of sound sources are realized, and automatic management work is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of self-wake-up monitoring, and in particular to a self-wake-up monitoring device and a monitoring system. Background Art

[0002] The self-wake-up device is a device specially designed for monitoring or recording data in outdoor environments. It has an autonomous wake-up function and can wake up and record data periodically to save energy and extend the operating time of the device. It is often used in animal monitoring, personnel activity monitoring, equipment monitoring and other fields.

[0003] The working mode of the self-wake-up device is mainly based on acoustic detection. It is awakened by environmental sound waves and collects and stores sound wave data after awakening. Due to the high noise in the outdoor environment, the self-wake-up device is easily affected by the external environment, resulting in false awakening or being disturbed by slight sound wave disturbances, causing the device to be awakened frequently, which not only increases the energy consumption of the device, but also causes the device memory to overflow, which is not conducive to the long-term operation of the device.

[0004] In addition, when there are multiple sound sources in the environment, the self-wake-up device needs to locate a single significant sound source in order to determine the sound wave data that needs to be stored. Existing devices collect sound waves for analysis by setting up a large number of microphones and magnetic heads, which makes the device bulky, increases the detection cost, and also causes the device's battery life to decrease. Summary of the invention

[0005] The object of the present invention is to provide a self-wake-up monitoring device and a monitoring system to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a self-wake-up monitoring device, comprising: a device housing, a generator, a power supply battery, a pickup, a piezoelectric head, a logic chip, a communication device, a data storage device and a communication circuit;

[0007] The device housing should be rainproof, shockproof, dustproof, and lightning-proof, and can be placed in outdoor environments for a long time;

[0008] The communication circuit is composed of a first resistor, a second resistor, a first capacitor, a second capacitor, a transistor, a power supply system interface, a communication system interface, a first magnetic head interface and a second magnetic head interface. One end of the first resistor is connected to the emitter of the transistor, and the other end is connected in series with the first capacitor. One end of the second resistor is grounded, and the other end is connected in series with the first capacitor. The second capacitor is connected in parallel with the second resistor. The positive and negative poles of the first magnetic head interface are connected to the two ends of the second capacitor, and the positive and negative poles of the second magnetic head interface are respectively connected to the two ends of the first resistor and the second resistor. The base of the transistor is connected to the power supply system interface, and the collector is connected to the communication system interface.

[0009] The self-wake-up monitoring system includes: a power generation module, a sound wave detection module, a logic oscillation module, a communication wake-up module and a sound source verification module;

[0010] The power generation module is used to obtain electrical energy for the device through the energy generation device and store the electrical energy in the battery;

[0011] The acoustic wave detection module is used to independently encapsulate the power supply system and the communication system of the wake-up monitoring device, and respectively set a pickup and a piezoelectric magnet, which are connected to each other through an oscillation circuit to control the main power supply cable between the power supply system and the communication system.

[0012] The logic oscillation module is used to generate an induced voltage consistent with the frequency and amplitude of the sound wave through the piezoelectric head when the pickup detects the ambient sound wave, calculate the sound intensity attenuation according to the frequency and energy spectrum density of the sound wave, and obtain the detection time difference of the sound wave by the pickups on both sides according to the sound speed in the medium; the piezoelectric head that detects the ambient sound wave first delays the waveform of the induced voltage by a time difference and outputs it to the oscillation circuit as the first induced voltage, and the pickup that detects the ambient sound wave later superimposes the waveform of the induced voltage with the sound intensity attenuation and outputs it to the oscillation circuit;

[0013] The communication wake-up module is used to generate a constant oscillation voltage in the oscillation circuit when the sound waves come from the same sound source. After the logic chip detects the oscillation voltage, it turns on the main power supply cable and wakes up the monitoring device to collect and store data;

[0014] The sound source detection module is used to measure the distance between the sound source and each magnetic head based on the distance between the magnetic heads on both sides, time delay and actual sound intensity attenuation, and to calculate the coordinates of the sound source by combining the coordinates of the magnetic heads on both sides and the distance between the sound source and the magnetic heads on both sides.

[0015] Furthermore, the power generation and supply module includes: a generator unit and a battery unit;

[0016] The generator unit is used to generate electricity to provide energy for the device, and the power supply mode includes: solar power supply, wind power supply and battery power supply;

[0017] The battery unit is used to store the electric energy generated by the generator and to supply power to the communication system after the logic circuit is turned on.

[0018] Further, the sound wave detection module includes: a pickup unit and a magnetic head piezoelectric unit;

[0019] The pickup unit is used to detect sound waves in the environment and analyze the energy spectrum density of the sound waves;

[0020] The magnetic head piezoelectric unit is used to generate an induced voltage according to the energy spectrum density of the sound wave.

[0021] Further, the logic oscillation module includes: a logic operation unit, an oscillation circuit unit and a conduction identification unit;

[0022] The logic operation unit is used to calculate the induced voltage according to the distance between the pickups and the energy spectrum density of the sound wave, so that the induced voltage meets the starting condition of the oscillation circuit, and the starting condition is determined by the actual monitoring area of ​​the sound;

[0023] The oscillation circuit unit is used to determine whether the sound waves input into the circuit come from the same sound source according to the induced voltage;

[0024] The conduction identification unit is used to conduct the path between the circuit system and the communication system to wake up the device when the current in the oscillation circuit is stable.

[0025] Furthermore, the communication wake-up module includes: a data acquisition unit and a data storage unit;

[0026] The data collection unit is used to collect environmental data after being awakened;

[0027] The data storage unit is used to store the collected environmental data.

[0028] Furthermore, the sound source detection module includes: an asynchronous detection unit, a distance detection unit and a sound source localization unit;

[0029] The asynchronous detection unit is used to obtain the time delay, frequency and spectral density of the sound waves in the two pickups;

[0030] The distance verification unit is used to measure the distance between the sound source and the magnetic head based on the distance between the magnetic heads on both sides, the time delay and the actual sound intensity attenuation;

[0031] The sound source localization unit is used to determine the coordinates of the sound source according to the coordinates of the magnetic heads on both sides and the distance between the sound source and the magnetic heads.

[0032] The corresponding method of the self-wake-up monitoring system, the system performs the following steps:

[0033] Step S1. The power supply system and the communication system of the wake-up monitoring device are independently packaged, and a pickup and a piezoelectric solenoid are respectively provided, wherein the piezoelectric solenoid is connected to each other through an oscillation circuit to control the on-off of the main power supply cable between the power supply system and the communication system;

[0034] Step S2. The microphone detects the ambient sound wave, generates an induced voltage consistent with the frequency and amplitude of the sound wave through the piezoelectric head, calculates the sound intensity attenuation from the frequency and energy spectrum density of the sound wave, and obtains the detection time difference of the sound wave by the microphones on both sides from the sound velocity in the medium;

[0035] Step S3. The piezoelectric head that first detects the ambient sound wave delays the waveform of the induced voltage by a time difference and outputs it to the oscillation circuit as the first induced voltage. The pickup that detects the ambient sound wave then superimposes the waveform of the induced voltage with the sound intensity attenuated and outputs it to the oscillation circuit.

[0036] Step S4. When the sound waves come from the same sound source, a constant oscillation voltage is generated in the oscillation circuit. After the voltage regulator chip detects the oscillation voltage, it turns on the main power supply cable and wakes up the monitoring device for data collection and data storage;

[0037] Step S5. The distance between the sound source and each magnetic head is calculated based on the distance between the magnetic heads on both sides, the time delay and the actual sound intensity attenuation, and the coordinates of the sound source are calculated by combining the coordinates of the magnetic heads on both sides and the distance between the sound source and the magnetic heads on both sides.

[0038] Further, step S1 includes:

[0039] Step S11. The generator and the power supply battery in the wake-up monitoring device are packaged into a power supply system, and the logic chip, the communication device, and the data storage device are packaged into a communication system. The systems are connected through a main power supply cable. The switch of the main power supply cable is controlled by a voltage stabilizing chip. The voltage stabilizing chip closes the switch when a stable voltage exists, and cuts off the switch after the stable voltage disappears and is maintained for a fixed time.

[0040] Step S12: respectively set up a pickup and a piezoelectric magnet in the power supply system and the communication system, and use an oscillation circuit to connect the two piezoelectric magnets and the voltage detection interface in the voltage stabilizing chip.

[0041] Further, step S2 includes:

[0042] Step S21. The sound pickup detects ambient sound waves through a microphone or eardrum, and transmits the detected sound wave vibration to the piezoelectric head. The piezoelectric head generates an induced voltage according to the sound wave vibration until the sound wave vibration stops. The voltage generated in the process is recorded as U(t), where t represents time;

[0043] Step S22. Calculate the energy spectrum density of the sound wave according to the energy conversion efficiency of the piezoelectric head, and calculate the sound intensity attenuation and the distance between the sound source and the pickup according to the following formula:

[0044]

[0045] Among them, H represents the sound intensity attenuation, r represents the density of the sound transmission medium, v represents the sound speed in the sound transmission medium, W represents the energy spectrum density of the sound wave, P represents the pressure in the environment, f represents the frequency of the sound wave, d represents the distance between the sound source and the pickup, and d0 represents the distance of the pickup in different systems;

[0046] Step S23: Determine the sound transmission delay te of the microphones on both sides according to the sound speed in the medium, where te=d0 / v.

[0047] Further, step S3 includes:

[0048] Step S31. The piezoelectric head that first detects the ambient sound wave delays the generated voltage by one sound transmission time edge through a delay device, and outputs a voltage Ua(t)=U(t-te) to the oscillation circuit. The piezoelectric head that detects the ambient sound wave later outputs a voltage Uc(t)=U(t)+H·k to the oscillation circuit through a superimposer, where k represents the energy conversion efficiency of the piezoelectric head.

[0049] Step S32: In the oscillation circuit, determine whether the output voltages of the piezoelectric heads on both sides meet the oscillation starting conditions, where the oscillation starting conditions are:

[0050]

[0051] Among them, A represents the maximum amplitude of Ua(t) and Uc(t), N represents the number of stages of the oscillation circuit, fa and fc represent the frequencies of Ua(t) and Uc(t) respectively, R represents the resistance value of the oscillation circuit, c represents the capacitance value of the oscillation circuit, and g is the adjustment coefficient, which is set according to the amplitude of the detected sound wave;

[0052] Step S33. When the output voltage does not meet the starting conditions, it means that the sound waves do not come from the same detectable sound source, the oscillation circuit does not generate a stable current, and the device does not wake up. When the output voltage meets the starting conditions, it means that the sound waves come from the same detectable sound source, and the oscillation circuit generates a stable current.

[0053] Further, step S4 includes:

[0054] Step S41. The voltage stabilizing chip detects the presence of a stable voltage in the oscillation circuit, turns on the switch of the main power supply cable, turns on the power supply system and the communication system, and wakes up the monitoring device;

[0055] Step S42. The monitoring device collects working data in the environment and stores the collected data in the memory. When the memory is full, it automatically sends all the data in the memory to the cloud and clears the memory.

[0056] Further, step S5 includes:

[0057] Step S51. Establish a coordinate system within the monitorable range to obtain the coordinates of the microphones on both sides. The distances between the sound source and the microphones on both sides are obtained by step S22. Triangulation is performed based on the fixed distances between the sound source and the microphones on both sides to obtain the estimated coordinates of the sound source.

[0058] Step S52: Store the estimated coordinates of the sound source and the working data collected by the monitoring device in the same memory directory as part of the working data.

[0059] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0060] 1. The present invention separately packages the power supply module and the communication storage module of the device, and assembles independent pickups and sensor heads to avoid false awakening of the device due to moisture, short circuits, etc., reduce the impact of the external environment on the device, improve the durability of the device, and ensure that the device can operate stably for a long time in the field environment.

[0061] 2. The present invention can set the starting conditions of the oscillation circuit according to the sound wave detection range and amplitude range of the monitored target, generate induced voltages according to the energy spectrum density of the sound waves, and delay the output according to the sound speed. The device can be awakened only when the sound waves detected at both ends reach the starting conditions, ensuring that the sound waves detected by the device are emitted by the same sound source, effectively removing noise or background noise in the sound, improving detection clarity and purity, and realizing an automatic awakening function.

[0062] 3. The present invention can calculate the distance to the sound source based on the distance between the magnetic heads on both sides, the time delay and the sound transmission medium parameters, and infer the source coordinates from the measurement results, thereby improving the convenience and applicability of the equipment, ensuring the accuracy and reliability of the detection data, realizing more refined monitoring and analysis of the sound source, and facilitating the implementation of automated management work. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0064] Figure 1 It is a structural schematic diagram of the self-wake-up monitoring system of the present invention;

[0065] Figure 2 It is a schematic diagram of the steps of the corresponding method of the self-wake-up monitoring system of the present invention;

[0066] Figure 3 It is a structural diagram of the communication circuit in the self-wake-up monitoring device of the present invention.

[0067] Figure numerals: first resistor R1, second resistor R2, first capacitor c1, second capacitor c2, power supply system voltage stabilization interface Vcc, communication system voltage stabilization interface Vdd, first pressure solenoid positive interface Uc+, first pressure solenoid negative interface Uc-, second pressure solenoid positive interface Ua+ and second pressure solenoid negative interface Ua-. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] See also Figure 1 , the present invention provides a technical solution: a self-wake-up monitoring device, including: a device housing, a generator, a power supply battery, a pickup, a piezoelectric head, a logic chip, a communication device, a data storage device and a communication circuit;

[0070] The device housing should be rainproof, shockproof, dustproof, and lightning-proof, and can be placed in outdoor environments for a long time;

[0071] like Figure 3 As shown, the communication circuit is composed of a first resistor, a second resistor, a first capacitor, a second capacitor, a transistor, a power supply system interface, a communication system interface, a first magnetic head interface and a second magnetic head interface. One end of the first resistor is connected to the emitter of the transistor, and the other end is connected in series with the first capacitor. One end of the second resistor is grounded, and the other end is connected in series with the first capacitor. The second capacitor is connected in parallel with the second resistor. The positive and negative poles of the first magnetic head interface are connected to the two ends of the second capacitor, and the positive and negative poles of the second magnetic head interface are respectively connected to the two ends of the first resistor and the second resistor. The base of the transistor is connected to the power supply system interface, and the collector is connected to the communication system interface.

[0072] The self-wake-up monitoring system includes: a power generation module, a sound wave detection module, a logic oscillation module, a communication wake-up module and a sound source verification module;

[0073] The power generation module is used to obtain electrical energy for the device through the energy generation device and store the electrical energy in the battery;

[0074] The power generation and supply module comprises: a generator unit and a battery unit;

[0075] The generator unit is used to generate electricity to provide energy for the device, and the power supply mode includes: solar power supply, wind power supply and battery power supply;

[0076] The battery unit is used to store the electric energy generated by the generator and to supply power to the communication system after the logic circuit is turned on.

[0077] The acoustic wave detection module is used to independently encapsulate the power supply system and the communication system of the wake-up monitoring device, and respectively set a pickup and a piezoelectric magnet, which are connected to each other through an oscillation circuit to control the main power supply cable between the power supply system and the communication system.

[0078] The sound wave detection module includes: a pickup unit and a magnetic head piezoelectric unit;

[0079] The pickup unit is used to detect sound waves in the environment and analyze the energy spectrum density of the sound waves;

[0080] The magnetic head piezoelectric unit is used to generate an induced voltage according to the energy spectrum density of the sound wave.

[0081] The logic oscillation module is used to generate an induced voltage consistent with the frequency and amplitude of the sound wave through the piezoelectric head when the pickup detects the ambient sound wave, calculate the sound intensity attenuation according to the frequency and energy spectrum density of the sound wave, and obtain the detection time difference of the sound wave by the pickups on both sides according to the sound speed in the medium; the piezoelectric head that detects the ambient sound wave first delays the waveform of the induced voltage by a time difference and outputs it to the oscillation circuit as the first induced voltage, and the pickup that detects the ambient sound wave later superimposes the waveform of the induced voltage with the sound intensity attenuation and outputs it to the oscillation circuit;

[0082] The logic oscillation module comprises: a logic operation unit, an oscillation circuit unit and a conduction identification unit;

[0083] The logic operation unit is used to calculate the induced voltage according to the distance between the pickups and the energy spectrum density of the sound wave, so that the induced voltage meets the starting condition of the oscillation circuit, and the starting condition is determined by the actual monitoring area of ​​the sound;

[0084] The oscillation circuit unit is used to determine whether the sound waves input into the circuit come from the same sound source according to the induced voltage;

[0085] The conduction identification unit is used to conduct the path between the circuit system and the communication system to wake up the device when the current in the oscillation circuit is stable.

[0086] The communication wake-up module is used to generate a constant oscillation voltage in the oscillation circuit when the sound waves come from the same sound source. After the logic chip detects the oscillation voltage, it turns on the main power supply cable and wakes up the monitoring device to collect and store data;

[0087] The communication wake-up module includes: a data acquisition unit and a data storage unit;

[0088] The data collection unit is used to collect environmental data after being awakened;

[0089] The data storage unit is used to store the collected environmental data.

[0090] The sound source detection module is used to measure the distance between the sound source and each magnetic head based on the distance between the magnetic heads on both sides, time delay and actual sound intensity attenuation, and to calculate the coordinates of the sound source by combining the coordinates of the magnetic heads on both sides and the distance between the sound source and the magnetic heads on both sides.

[0091] The sound source detection module includes: an asynchronous detection unit, a distance detection unit and a sound source localization unit;

[0092] The asynchronous detection unit is used to obtain the time delay, frequency and spectral density of the sound waves in the two pickups;

[0093] The distance verification unit is used to measure the distance between the sound source and the magnetic head based on the distance between the magnetic heads on both sides, the time delay and the actual sound intensity attenuation;

[0094] The sound source localization unit is used to determine the coordinates of the sound source according to the coordinates of the magnetic heads on both sides and the distance between the sound source and the magnetic heads.

[0095] like Figure 2 As shown, the self-wake-up monitoring system corresponds to the method, and the system performs the following steps:

[0096] Step S1. The power supply system and the communication system of the wake-up monitoring device are independently packaged, and a pickup and a piezoelectric solenoid are respectively provided, wherein the piezoelectric solenoid is connected to each other through an oscillation circuit to control the on-off of the main power supply cable between the power supply system and the communication system;

[0097] Step S1 includes:

[0098] Step S11. The generator and the power supply battery in the wake-up monitoring device are packaged into a power supply system, and the logic chip, the communication device, and the data storage device are packaged into a communication system. The systems are connected through a main power supply cable. The switch of the main power supply cable is controlled by a voltage stabilizing chip. The voltage stabilizing chip closes the switch when a stable voltage exists, and cuts off the switch after the stable voltage disappears and is maintained for a fixed time.

[0099] Step S12: respectively set up a pickup and a piezoelectric magnet in the power supply system and the communication system, and use an oscillation circuit to connect the two piezoelectric magnets and the voltage detection interface in the voltage stabilizing chip.

[0100] Step S2. The microphone detects the ambient sound wave, generates an induced voltage consistent with the frequency and amplitude of the sound wave through the piezoelectric head, calculates the sound intensity attenuation from the frequency and energy spectrum density of the sound wave, and obtains the detection time difference of the sound wave by the microphones on both sides from the sound velocity in the medium;

[0101] Step S2 includes:

[0102] Step S21. The sound pickup detects ambient sound waves through a microphone or eardrum, and transmits the detected sound wave vibration to the piezoelectric head. The piezoelectric head generates an induced voltage according to the sound wave vibration until the sound wave vibration stops. The voltage generated in the process is recorded as U(t), where t represents time;

[0103] Step S22. Calculate the energy spectrum density of the sound wave according to the energy conversion efficiency of the piezoelectric head, and calculate the sound intensity attenuation and the distance between the sound source and the pickup according to the following formula:

[0104]

[0105] Among them, H represents the sound intensity attenuation, r represents the density of the sound transmission medium, v represents the sound speed in the sound transmission medium, W represents the energy spectrum density of the sound wave, P represents the pressure in the environment, f represents the frequency of the sound wave, d represents the distance between the sound source and the pickup, and d0 represents the distance of the pickup in different systems;

[0106] Step S23: Determine the sound transmission delay te of the microphones on both sides according to the sound speed in the medium, where te=d0 / v.

[0107] Step S3. The piezoelectric head that first detects the ambient sound wave delays the waveform of the induced voltage by a time difference and outputs it to the oscillation circuit as the first induced voltage. The pickup that detects the ambient sound wave then superimposes the waveform of the induced voltage with the sound intensity attenuated and outputs it to the oscillation circuit.

[0108] Step S3 includes:

[0109] Step S31. The piezoelectric head that first detects the ambient sound wave delays the generated voltage by one sound transmission time edge through a delay device, and outputs a voltage Ua(t)=U(t-te) to the oscillation circuit. The piezoelectric head that detects the ambient sound wave later outputs a voltage Uc(t)=U(t)+H·k to the oscillation circuit through a superimposer, where k represents the energy conversion efficiency of the piezoelectric head.

[0110] Step S32: In the oscillation circuit, determine whether the output voltages of the piezoelectric heads on both sides meet the oscillation starting conditions, where the oscillation starting conditions are:

[0111]

[0112] Among them, A represents the maximum amplitude of Ua(t) and Uc(t), N represents the number of stages of the oscillation circuit, fa and fc represent the frequencies of Ua(t) and Uc(t) respectively, R represents the resistance value of the oscillation circuit, c represents the capacitance value of the oscillation circuit, and g is the adjustment coefficient, which is set according to the amplitude of the detected sound wave;

[0113] Step S33. When the output voltage does not meet the starting conditions, it means that the sound waves do not come from the same detectable sound source, the oscillation circuit does not generate a stable current, and the device does not wake up. When the output voltage meets the starting conditions, it means that the sound waves come from the same detectable sound source, and the oscillation circuit generates a stable current.

[0114] Step S4. When the sound waves come from the same sound source, a constant oscillation voltage is generated in the oscillation circuit. After the voltage regulator chip detects the oscillation voltage, it turns on the main power supply cable and wakes up the monitoring device for data collection and data storage;

[0115] Step S4 includes:

[0116] Step S41. The voltage stabilizing chip detects the presence of a stable voltage in the oscillation circuit, turns on the switch of the main power supply cable, turns on the power supply system and the communication system, and wakes up the monitoring device;

[0117] Step S42. The monitoring device collects working data in the environment and stores the collected data in the memory. When the memory is full, it automatically sends all the data in the memory to the cloud and clears the memory.

[0118] Step S5. The distance between the sound source and each magnetic head is calculated based on the distance between the magnetic heads on both sides, the time delay and the actual sound intensity attenuation, and the coordinates of the sound source are calculated by combining the coordinates of the magnetic heads on both sides and the distance between the sound source and the magnetic heads on both sides.

[0119] Step S5 includes:

[0120] Step S51. Establish a coordinate system within the monitorable range to obtain the coordinates of the microphones on both sides. The distances between the sound source and the microphones on both sides are obtained by step S22. Triangulation is performed based on the fixed distances between the sound source and the microphones on both sides to obtain the estimated coordinates of the sound source.

[0121] Step S52: Store the estimated coordinates of the sound source and the working data collected by the monitoring device in the same memory directory as part of the working data.

[0122] Example: The distance between the microphones on both sides of the monitoring device is 6.8m. At a certain moment, the microphones in the communication system detect a frequency of 200HZ and a spectral density of 10J·m 2 For a sound wave, the speed of sound in air is 340 m / s and the pressure is 1 MPa, then the sound intensity decays to 0.32 J·m 2 The time delay is 0.02s, and the induced current of the piezoelectric head is delayed by 0.02s. After the pickup in the power supply system detects the sound wave, 0.32J·m 2 The sound intensity output meets the starting conditions in the oscillation circuit, switches on the main power supply cable, and wakes up the monitoring device.

[0123] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0124] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-wake-up monitoring system, characterized in that: The system includes the following modules: power generation module, sound wave detection module, logic oscillation module, communication wake-up module and sound source verification module; The power generation module is used to obtain electrical energy for the device through the energy generation device and store the electrical energy in the battery; The acoustic wave detection module is used to independently encapsulate the power supply system and the communication system of the wake-up monitoring device, and respectively set a pickup and a piezoelectric magnet, which are connected to each other through an oscillation circuit to control the main power supply cable between the power supply system and the communication system. The logic oscillation module is used to generate an induced voltage consistent with the frequency and amplitude of the sound wave through the piezoelectric head when the pickup detects the ambient sound wave, calculate the sound intensity attenuation according to the frequency and energy spectrum density of the sound wave, and obtain the detection time difference of the sound wave by the pickups on both sides according to the sound speed in the medium; the piezoelectric head that detects the ambient sound wave first delays the waveform of the induced voltage by a time difference and outputs it to the oscillation circuit as the first induced voltage, and the pickup that detects the ambient sound wave later superimposes the waveform of the induced voltage with the sound intensity attenuation and outputs it to the oscillation circuit; The communication wake-up module is used to generate a constant oscillation voltage in the oscillation circuit when the sound waves come from the same sound source. After the logic chip detects the oscillation voltage, it turns on the main power supply cable and wakes up the monitoring device to collect and store data; The sound source detection module is used to measure the distance between the sound source and each magnetic head based on the distance between the magnetic heads on both sides, time delay and actual sound intensity attenuation, and to calculate the coordinates of the sound source by combining the coordinates of the magnetic heads on both sides and the distance between the sound source and the magnetic heads on both sides.

2. The self-wake-up monitoring system according to claim 1, characterized in that: The power generation and supply module comprises: a generator unit and a battery unit; The generator unit is used to generate electricity to provide energy for the device, and the power supply mode includes: solar power supply, wind power supply and battery power supply; The battery unit is used to store the electric energy generated by the generator and to supply power to the communication system after the logic circuit is turned on; The sound wave detection module includes: a pickup unit and a magnetic head piezoelectric unit; The pickup unit is used to detect sound waves in the environment and analyze the energy spectrum density of the sound waves; The magnetic head piezoelectric unit is used to generate an induced voltage according to the energy spectrum density of the sound wave.

3. The self-wake-up monitoring system according to claim 2, characterized in that: The acoustic wave detection module is implemented by the following steps: Step S11. The generator and the power supply battery in the wake-up monitoring device are packaged into a power supply system, and the logic chip, the communication device, and the data storage device are packaged into a communication system. The systems are connected through a main power supply cable. The switch of the main power supply cable is controlled by a voltage stabilizing chip. The voltage stabilizing chip closes the switch when a stable voltage exists, and cuts off the switch after the stable voltage disappears and is maintained for a fixed time. Step S12: respectively set up a pickup and a piezoelectric magnet in the power supply system and the communication system, and use an oscillation circuit to connect the two piezoelectric magnets and the voltage detection interface in the voltage stabilizing chip.

4. The self-wake-up monitoring system according to claim 3, characterized in that: The logic oscillation module comprises: a logic operation unit, an oscillation circuit unit and a conduction identification unit; The logic operation unit is used to calculate the induced voltage according to the distance between the pickups and the energy spectrum density of the sound wave, so that the induced voltage meets the starting condition of the oscillation circuit, and the starting condition is determined by the actual monitoring area of ​​the sound; The oscillation circuit unit is used to determine whether the sound waves input into the circuit come from the same sound source according to the induced voltage; The conduction identification unit is used to conduct the path between the circuit system and the communication system to wake up the device when the current in the oscillation circuit is stable.

5. The self-wake-up monitoring system according to claim 4, characterized in that: The logic oscillation module is implemented by the following steps: Step S21. The sound pickup detects ambient sound waves through a microphone or eardrum, and transmits the detected sound wave vibration to the piezoelectric head. The piezoelectric head generates an induced voltage according to the sound wave vibration until the sound wave vibration stops. The voltage generated in the process is recorded as U(t), where t represents time; Step S22. Calculate the energy spectrum density of the sound wave according to the energy conversion efficiency of the piezoelectric head, and calculate the sound intensity attenuation and the distance between the sound source and the pickup according to the following formula: Among them, H represents the sound intensity attenuation, r represents the density of the sound transmission medium, v represents the sound speed in the sound transmission medium, W represents the energy spectrum density of the sound wave, P represents the pressure in the environment, f represents the frequency of the sound wave, d represents the distance between the sound source and the pickup, and d0 represents the distance of the pickup in different systems; Step S23. Determine the sound transmission delay te of the microphones on both sides according to the sound velocity in the medium, wherein te=d0 / v; Step S31. The piezoelectric head that first detects the ambient sound wave delays the generated voltage by one sound transmission time edge through a delay device, and outputs a voltage Ua(t)=U(t-te) to the oscillation circuit. The piezoelectric head that detects the ambient sound wave later outputs a voltage Uc(t)=U(t)+H·k to the oscillation circuit through a superimposer, where k represents the energy conversion efficiency of the piezoelectric head. Step S32: In the oscillation circuit, determine whether the output voltages of the piezoelectric heads on both sides meet the oscillation starting conditions, where the oscillation starting conditions are: Among them, A represents the maximum amplitude of Ua(t) and Uc(t), N represents the number of stages of the oscillation circuit, fa and fc represent the frequencies of Ua(t) and Uc(t) respectively, R represents the resistance value of the oscillation circuit, c represents the capacitance value of the oscillation circuit, and g is the adjustment coefficient, which is set according to the amplitude of the detected sound wave; Step S33. When the output voltage does not meet the starting conditions, it means that the sound waves do not come from the same detectable sound source, the oscillation circuit does not generate a stable current, and the device does not wake up. When the output voltage meets the starting conditions, it means that the sound waves come from the same detectable sound source, and the oscillation circuit generates a stable current.

6. The self-wake-up monitoring system according to claim 5, characterized in that: The communication wake-up module includes: a data acquisition unit and a data storage unit; The data collection unit is used to collect environmental data after being awakened; The data storage unit is used to store the collected environmental data; The sound source detection module includes: an asynchronous detection unit, a distance detection unit and a sound source localization unit; The asynchronous detection unit is used to obtain the time delay, frequency and spectral density of the sound waves in the two pickups; The distance verification unit is used to measure the distance between the sound source and the magnetic head based on the distance between the magnetic heads on both sides, the time delay and the actual sound intensity attenuation; The sound source localization unit is used to determine the coordinates of the sound source according to the coordinates of the magnetic heads on both sides and the distance between the sound source and the magnetic heads.

7. The self-wake-up monitoring system according to claim 6, characterized in that: The communication wake-up module and the sound source verification module are implemented by the following steps: Step S41. The voltage stabilizing chip detects the presence of a stable voltage in the oscillation circuit, turns on the switch of the main power supply cable, turns on the power supply system and the communication system, and wakes up the monitoring device; Step S42. The monitoring device collects working data in the environment and stores the collected data in the memory. When the memory is full, it automatically sends all the data in the memory to the cloud and clears the memory; Step S51. Establish a coordinate system within the monitorable range to obtain the coordinates of the microphones on both sides. The distances between the sound source and the microphones on both sides are obtained by step S22. Triangulation is performed based on the fixed distances between the sound source and the microphones on both sides to obtain the estimated coordinates of the sound source. Step S52: Store the estimated coordinates of the sound source and the working data collected by the monitoring device in the same memory directory as part of the working data.

8. A self-awakening monitoring device, comprising: The device housing, generator, power supply battery, pickup, piezoelectric head, communication equipment and data storage equipment are characterized in that: it also includes a logic chip and a communication circuit; The communication circuit is composed of a first resistor, a second resistor, a first capacitor, a second capacitor, a transistor, a power supply system interface, a communication system interface, a first magnetic head interface and a second magnetic head interface. One end of the first resistor is connected to the emitter of the transistor, and the other end is connected in series with the first capacitor. One end of the second resistor is grounded, and the other end is connected in series with the first capacitor. The second capacitor is connected in parallel with the second resistor. The positive and negative poles of the first magnetic head interface are connected to the two ends of the second capacitor, and the positive and negative poles of the second magnetic head interface are respectively connected to the two ends of the first resistor and the second resistor. The base of the transistor is connected to the power supply system interface, and the collector is connected to the communication system interface.

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