CN114111912A - Temperature difference self-powered temperature and vibration composite detection system and implementation method thereof - Google Patents
Temperature difference self-powered temperature and vibration composite detection system and implementation method thereof Download PDFInfo
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- CN114111912A CN114111912A CN202111507885.0A CN202111507885A CN114111912A CN 114111912 A CN114111912 A CN 114111912A CN 202111507885 A CN202111507885 A CN 202111507885A CN 114111912 A CN114111912 A CN 114111912A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Abstract
The invention discloses a temperature difference self-powered temperature and vibration composite detection system and an implementation method thereof, and relates to the field of temperature difference self-powered temperature and vibration composite detection. The long-term-use temperature and vibration composite detection system without replacing batteries can realize self power supply in a temperature difference power generation mode, can measure vibration and temperature signals on the surface of equipment, perform online monitoring and intelligent operation and maintenance on the equipment, avoid the problem that the batteries need to be replaced frequently in the use process of the sensor, increase the cost, avoid places where the sensor is installed, and be inconvenient for operators to replace the batteries, work in the places, not only increase the labor intensity of the operators, but also bring danger to the life safety of the operators, and is very dangerous.
Description
Technical Field
The invention relates to the field of temperature difference self-powered temperature and vibration composite detection, in particular to a temperature difference self-powered temperature and vibration composite detection system and an implementation method thereof.
Background
The traditional sensors are all supplied with power and transmitted by wires. In order to save the wiring cost and trouble, people develop wireless transmission technology, and many sensors have used wireless transmission technology to transmit data and supply power to batteries.
However, the electric quantity and the service life of the battery are always limited, the electric quantity and the volume of the battery are closely related, and a large-capacity battery cannot be used in many application scenes with small volume, so that the battery of the sensor needs to be frequently replaced in the using process, the cost is increased, the battery replacement of people is inconvenient in places where many sensors are installed, the battery needs to be replaced in special places, and the labor intensity of operators and the danger in the working process are increased.
Summary of the invention
The invention aims to provide a temperature difference self-powered temperature and vibration composite detection system and an implementation method thereof, and aims to solve the problems that the electric quantity and the service life of a battery are always limited, the electric quantity and the volume of the battery are closely related, and a large-capacity battery cannot be used in many small-volume application scenes, so that the battery needs to be frequently replaced in the use process of a sensor, the cost is increased, the batteries of people are inconvenient to replace in many sensor installation places, the batteries of the sensor need to be replaced in special places, and the labor intensity of operators and the dangerousness in the working process are increased.
In order to achieve the purpose, the invention provides the following technical scheme: a temperature difference self-powered temperature and vibration composite detection system comprises a temperature difference power generation device, a temperature and vibration detection device and a heat dissipation device, wherein the temperature difference power generation device comprises a magnet installation base, a temperature difference power generation cell, a heat conduction plate, a heat conduction glue and a metal base, the magnet installation base is used for installing and fixing the whole temperature difference self-powered temperature and vibration composite detection system, the magnet installation base uses a high-temperature magnet which can be normally used at a temperature of more than 300 ℃ and does not influence magnetism, vibration measurement precision is ensured, the temperature difference power generation cell is formed by clamping a plurality of series PN junctions between two parallel ceramic plates and is processed and manufactured by adopting a unique film technology, when two parallel ceramic plates are placed at different temperatures, direct current voltage can be generated by utilizing the Seebeck effect principle, the size of the output voltage depends on the temperature difference between the two parallel ceramic plates, the heat conduction plate is used for placing the temperature difference power generation cell, and with magnet installation base zonulae occludens, let the better transmission of heat on the magnet installation base to thermoelectric generation electricity core bottom, embedded temperature detect probe, temperature detect probe embeds to the heat-conducting plate the inside, is closer to the equipment under test surface, and temperature measurement is more accurate, heat conduction glue is used for filling the inside space except magnet installation base, thermoelectric generation electricity core, heat-conducting plate part of metal base, including temperature analog signal transmission wire of temperature detect probe, lets the better transmission of heat to heat abstractor, looses unnecessary heat as fast as far as possible, lets the temperature difference between the ceramic plate on the thermoelectric generation electricity core increase as far as possible, metal base is as the base of whole difference in temperature self-powered temperature vibration composite detection system, and thermoelectric generation electricity core, heat-conducting plate, the heat conduction glue of thermoelectric generation device are placed to the inside.
Preferably, the temperature and vibration detection device comprises a temperature detection module, a vibration detection module, a data processing module, a wireless communication module, a self-powered module and a rechargeable battery, wherein the temperature detection module comprises a temperature detection probe and a temperature detection processing circuit, the temperature detection probe is used for measuring the surface temperature of the detected equipment with higher precision and is embedded into a heat conduction plate of the temperature difference power generation device, the temperature analog signal is transmitted to the temperature detection processing circuit through a temperature analog signal transmission lead and is converted into a digital signal which is transmitted to the digital processing module, the vibration detection module comprises a vibration detection probe, a vibration detection processing circuit and the like, the contact part of the vibration detection probe and the metal shell is horizontal and rigidly connected, the metal shell is rigidly connected with the metal base of the temperature difference power generation device, and a magnet mounting base, a magnet mounting base and a rechargeable battery are arranged in the temperature difference power generation device, Rigid connection between thermoelectric generation electricity core, heat-conducting plate, heat-conducting glue, the metal base guarantees that vibration test probe and equipment under test surface are rigid connection, rechargeable battery's fixed surface is connected with the battery case, the fixed surface of battery case is connected with the heat dissipation shell, the upside of heat dissipation shell is provided with the upper cover, the inner wall of heat dissipation shell is provided with the sealing washer, pass through fixed screw fixed connection between metal base and the heat-conducting glue.
Preferably, the vibration detection processing circuit processes a vibration analog signal collected by the vibration detection probe, the vibration analog signal enters the data processing module through processing circuits such as anti-aliasing filtering, analog-to-digital conversion, low-pass filtering and the like, the data processing circuit performs time domain and frequency domain analysis on a vibration digital signal processed by the vibration detection processing circuit and outputs a vibration analysis map such as an acceleration peak value, a speed effective value, a displacement peak value, an envelope value, skewness, kurtosis, margin, a spectral variance, a spectral mean value, a spectral effective value and the like and a vibration analysis map such as a time domain spectrum, a frequency domain spectrum, an envelope spectrum, a trajectory map and the like, the data processing circuit performs temperature algorithm processing processed by the temperature detection processing circuit, the digital processing circuit transmits processed vibration and temperature signals to a network and a cloud platform through the wireless communication module, and the wireless communication module receives characteristic values and various analysis waveforms of vibration and temperature sent from the data processing module, upload network and cloud platform to the order that receives to come from network and cloud platform carries out data interaction with data processing module, from unstable voltage and the electric current that thermoelectric generation device provided of self-power module receipt, convert the voltage and the electric current that can charge for the lithium cell that charges into steadily, give the lithium cell power supply that charges, rechargeable battery adopts lithium ion rechargeable battery, supplies power for temperature detection module, vibration detection module, data processing module, wireless communication module, and the stable voltage and the electric current that receive to come from self-power module to provide charge for oneself.
Preferably, the heat dissipation device is made of high-heat-conduction materials, the periphery of the heat dissipation device is designed into a sheet shape, and the heat dissipation area is increased.
A temperature difference self-powered temperature and vibration composite detection implementation method is characterized by comprising the following steps: the device comprises a temperature difference power generation device, an energy collection device and a power supply device.
Preferably, the thermoelectric generation device mainly comprises a U2 thermoelectric generation battery cell and an auxiliary circuit thereof, and the U2 thermoelectric generation battery cell generates direct-current voltage by a PN junction between two ceramic plates by means of the temperature difference between an upper ceramic plate and a lower ceramic plate of the battery cell and by utilizing the Seebeck effect principle.
Preferably, the energy collecting device mainly comprises a U1 energy collecting module and its auxiliary circuit, because of unstable temperature difference between the upper and lower ceramic plates of the thermoelectric generation cell, the dc voltage and current generated by the thermoelectric generation device are also unstable, the energy collecting device collects the unstable dc voltage and current, and outputs the stable dc voltage and current C1 for stabilizing the dc voltage generated by the thermoelectric generation device according to the requirement, C1 should be as close as possible to the VIN pin of the U1 energy collecting module, the connection line should be as wide and short as possible, R3 is used to set the optimal input voltage operating point, the MPPC circuit in the U1 energy collecting module dynamically adjusts the average inductive current to prevent the input voltage from being lower than the MPPC threshold, when the voltage of VIN is greater than the voltage of MPPC, the inductive current increases, the known voltage of VIN is pulled to the voltage setting value of MPPC, when the voltage of VIN is less than the voltage of MPPC, the inductor current decreases, and knowing that the voltage of VIN rises to the voltage set value VMPPC of MPPC, VMPPC is 10uA R3, the AUX circuit in the U1 energy collection module is the voltage circuit generated by the start circuit.
Preferably, the U1 energy collection module internal circuit supplies power until the main output circuit VOUT reaches the set output voltage value, the capacitor C2 is placed between the AUX circuit and the GND circuit to stabilize the voltage of the AUX circuit, the SHDN circuit in the U1 energy collection module is used to control the whole energy collection module to turn on and off the LDO and FBLDO circuits in the U1 energy collection module to provide a low power stabilized voltage output, the warm vibration composite detection circuit is powered when the VOUT circuit has not charged enough to power the warm vibration composite detection circuit to the BT1 rechargeable lithium battery, the output voltage of the LDO circuit is set by the resistors R4 and R5, the VLDO 1.005V (R4/R5+1), the PGOOD circuit in the U1 energy collection module is used to indicate the state of the U1 energy collection module, the VOUT circuit in the U1 energy collection module outputs voltage current to charge the BT1 rechargeable lithium battery, the voltage value output by the VOUT circuit is set by resistors R1 and R2, VOUT is 1.005V (R1/R2+1), and the inductor L1 needs to adopt a power inductor with a low DCR value.
The invention has the technical effects and advantages that: the invention does not need to replace the long-term used temperature and vibration composite detection system of the battery, can self-power in a thermoelectric generation mode, can measure the vibration and temperature signals on the surface of the equipment, can carry out on-line monitoring and intelligent operation and maintenance on the equipment, and avoids the problem that the battery needs to be frequently replaced and the cost is increased in the use process of the sensor. It is very dangerous.
Drawings
FIG. 1 is a schematic view of the overall front cross-sectional structure of the present invention;
FIG. 2 is a schematic diagram of the overall circuit structure of the present invention;
wherein 1, charging the battery; 2. a wireless communication module; 3. a vibration detection module; 4. a data processing module; 5. A metal base; 6. fixing screws; 7. a thermoelectric generation cell core; 8. a heat conducting plate; 9. an upper cover; 10. a battery case; 11. a seal ring; 12. a heat dissipation housing; 13. a temperature detection module; 14. a temperature analog signal transmission wire; 15. a temperature detection probe; 16. heat conducting glue; 17. magnet installation base.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, the thermoelectric generation device comprises a thermoelectric generation device, a temperature vibration detection device and a heat dissipation device, wherein the thermoelectric generation device is composed of a magnet installation base 17, a thermoelectric generation cell 7, a heat conduction plate 8, a heat conduction glue 16 and a metal base 5, the magnet installation base 17 is used for installing and fixing the whole thermoelectric self-powered temperature vibration composite detection system, the magnet installation base 17 uses a high-temperature magnet which can be normally used at a temperature above 300 ℃ and does not influence magnetism, and vibration measurement precision is ensured, the thermoelectric generation cell 7 is formed by clamping a plurality of PN junctions in series between two parallel ceramic plates and is processed and manufactured by adopting a unique film technology, when the two parallel ceramic plates are placed at different temperatures, direct current voltage can be generated by utilizing the Seebeck effect principle, the output voltage depends on the temperature difference between the two parallel ceramic plates, the heat conduction plate 8 is used for placing the thermoelectric generation cell 7, the temperature sensor is tightly connected with a magnet mounting base 17, so that heat on the magnet mounting base 17 is better transferred to the bottom of a thermoelectric generation cell 7, a temperature detection probe 15 is embedded, the temperature detection probe 15 is embedded into a heat conduction plate 8 and is closer to the surface of equipment to be measured, temperature measurement is more accurate, heat conduction glue 16 is used for filling the space inside a metal base 5 except for the magnet mounting base 17, the thermoelectric generation cell 7 and the heat conduction plate 8, the space comprises a temperature analog signal transmission lead 14 of the temperature detection probe 15, so that heat is better transferred to a heat dissipation device, redundant heat is dissipated as fast as possible, the temperature difference between an upper ceramic plate and a lower ceramic plate of the thermoelectric generation cell 7 is increased as much as possible, the metal base 5 is used as a base of the whole thermoelectric self-powered temperature-vibration composite detection system, and the thermoelectric generation cell 7, the heat conduction plate 8 and the heat conduction glue 16 of the thermoelectric generation device are placed inside the metal base 5, the temperature vibration detection device comprises a temperature detection module 13, a vibration detection module 3, a data processing module 4, a wireless communication module 2, a self-powered module and a rechargeable battery 1, wherein the temperature detection module 13 comprises a temperature detection probe 15 and a temperature detection processing circuit, the temperature detection probe 15 is used for measuring the temperature of the surface of the detected equipment with higher precision and is embedded into a heat conduction plate 8 of the temperature difference power generation device, a temperature analog signal is transmitted to the temperature detection processing circuit through a temperature analog signal transmission lead 14 and is converted into a digital signal and is transmitted to the digital processing module, the vibration detection module 3 comprises a vibration detection probe, a vibration detection processing circuit and the like, the contact part of the vibration detection probe and a metal shell is horizontal and is rigidly connected, the metal shell is rigidly connected with a metal base 5 of the temperature difference power generation device, a magnet mounting base 17, a magnet mounting base and a magnet mounting base are arranged in the temperature difference power generation device, The temperature difference power generation battery cell 7, the heat conduction plate 8, the heat conduction glue 16 and the metal base 5 are in rigid connection, the vibration detection probe is ensured to be in rigid connection with the surface of a device to be detected, the battery box 10 is fixedly connected to the surface of the rechargeable battery 1, the heat dissipation shell 12 is fixedly connected to the surface of the battery box 10, the upper cover 9 is arranged on the upper side of the heat dissipation shell 12, the sealing ring 11 is arranged on the inner wall of the heat dissipation shell 12, and the metal base 5 and the heat conduction glue 16 are fixedly connected through the fixing screw 6.
The second embodiment is as follows:
as shown in fig. 2, the vibration analog signal collected by the vibration detection probe is processed by the vibration detection processing circuit, and enters the data processing module 4 through processing circuits such as anti-aliasing filtering, analog-to-digital conversion, and low-pass filtering, the vibration digital signal processed by the vibration detection processing circuit is analyzed in time domain and frequency domain, and the acceleration peak value, the velocity effective value, the displacement peak value, the envelope value, the skewness, the kurtosis, the margin, the spectral variance, the spectral mean value, the spectral effective value and other characteristic values, as well as the vibration analysis maps such as time domain spectrum, frequency domain spectrum, envelope spectrum, and trajectory map are output, the data processing circuit processes the temperature algorithm processed by the temperature detection processing circuit, the digital processing circuit sends the processed vibration and temperature signals to the network and cloud platform through the wireless communication module 2, the wireless communication module 2 receives the vibration and temperature characteristic values and various analysis waveforms sent from the data processing module 4, the self-powered module receives unstable voltage and current provided by the thermoelectric generation device, converts the unstable voltage and current into stable voltage and current which can charge a rechargeable lithium battery, and supplies power to the rechargeable lithium battery, the rechargeable battery 1 adopts a lithium ion rechargeable battery 1, supplies power to the temperature detection module 13, the vibration detection module 3, the data processing module 4 and the wireless communication module 2, and receives the stable voltage and current provided by the self-powered module to charge the self-powered lithium battery, the heat dissipation device adopts high heat conduction materials, the periphery of the heat dissipation device is designed into a sheet shape, the heat dissipation area is increased, the whole thermoelectric self-powered temperature and vibration composite detection system is ensured to be firmly installed on a tested device, and heat on the surface of the device can be better conducted to the surface of a thermoelectric generation battery cell 7, and the stability of vibration transmission can be ensured, and the vibration measurement precision is ensured.
The third concrete embodiment:
as shown in fig. 2, the thermoelectric generation device includes a thermoelectric generation device, an energy collection device and a power supply device, the thermoelectric generation device mainly includes a U2 thermoelectric generation cell 7 and its accessory circuit, the U2 thermoelectric generation cell 7 depends on the temperature difference between the upper and lower ceramic plates of the cell, and the seebeck effect principle is utilized to make the PN junction between the ceramic plates generate a dc voltage, the energy collection device mainly includes a U1 energy collection module and its accessory circuit, because the temperature difference between the upper and lower ceramic plates of the thermoelectric generation cell 7 is unstable, the dc voltage and current generated by the thermoelectric generation device are also unstable, the energy collection device collects the unstable dc voltage and current, and outputs stable dc voltage and current C1 to stabilize the dc voltage generated by the thermoelectric generation device, C1 should be as close to VIN of the U1 energy collection module as possible, the connection line should be as wide and short as possible, r3 is used to set the optimum input voltage operating point, the MPPC circuit in the U1 energy collection module dynamically adjusts the average inductor current to prevent the input voltage from falling below the MPPC threshold, the inductor current increases when the voltage of VIN is greater than the voltage of MPPC, knowing that the voltage of VIN is pulled to the voltage set point of MPPC, the inductor current decreases when the voltage of VIN is less than the voltage of MPPC, knowing that the voltage of VIN rises to the voltage set point of MPPC VMPPC, VMPPC 10uA R3, the AUX circuit in the U1 energy collection module is the voltage circuit generated by the startup circuit, the internal circuits of the U1 energy collection module are powered until the main output circuit reaches the set output voltage value, a capacitor C2 is placed between the AUX circuit and the GND circuit to stabilize the voltage of the AUX circuit, the SHDN circuit in the U1 energy collection module is used to control the on and off of the LDO and the U1 energy collection module to provide a stable output of small fbw, when the VOUT circuit does not charge the BT1 rechargeable lithium battery enough to supply power to the warm-vibration composite detection circuit, the warm-vibration composite detection circuit is supplied with power, the output voltage of the LDO circuit is set by resistors R4 and R5, the VLDO is 1.005V (R4/R5+1), the PGOOD circuit in the U1 energy collection module is used to indicate the state of the U1 energy collection module, the VOUT circuit in the U1 energy collection module outputs voltage current to charge the BT1 rechargeable lithium battery, the voltage value output by the VOUT circuit is set by resistors R1 and R2, the VOUT is 1.005V (R1/R2+1), and the inductor L1 needs to use a power inductor with a low DCR value.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides a temperature difference is from compound detecting system that shakes of power supply temperature, includes thermoelectric generation device, temperature detection device and heat abstractor that shakes, its characterized in that: the thermoelectric generation device consists of a magnet installation base, a thermoelectric generation cell, a heat conduction plate, heat conducting glue and a metal base, wherein the magnet installation base is used for installing and fixing the whole thermoelectric self-powered temperature and vibration composite detection system, the magnet installation base uses a high-temperature magnet and can be normally used at the temperature of more than 300 ℃ without influencing magnetism, and the vibration measurement precision is ensured, the thermoelectric generation cell is clamped between two parallel ceramic plates by a plurality of series-connected PN junctions and is processed and manufactured by adopting a unique film technology, the Seebeck effect principle is utilized, when the two parallel ceramic plates are placed at different temperatures, direct current voltage can be generated, the size of output voltage depends on the temperature difference between the two parallel ceramic plates, the heat conduction plate is used for placing the thermoelectric generation cell and is tightly connected with the magnet installation base, so that the heat on the magnet installation base is better transferred to the bottom of the thermoelectric generation cell, embedded temperature test probe, the heat-conducting plate the inside is inlayed to temperature test probe, more is close to the equipment under test surface, and temperature measurement is more accurate, heat-conducting glue is used for filling the inside space except that magnet installation base, thermoelectric generation electricity core, heat-conducting plate part of metal base, and temperature analog signal transmission wire including temperature test probe lets the better heat transfer to heat abstractor of heat, looses unnecessary heat as fast as possible, lets the difference in temperature between the ceramic plate as far as possible increase about the thermoelectric generation electricity core, metal base is as the base of whole difference in temperature self-powered temperature vibration composite detection system, and thermoelectric generation device's thermoelectric generation electricity core, heat-conducting plate, heat-conducting glue are placed to the inside.
2. The temperature difference self-powered temperature and vibration composite detection system according to claim 1, characterized in that: the temperature and vibration detection device comprises a temperature detection module, a vibration detection module, a data processing module, a wireless communication module, a self-powered module and a rechargeable battery, wherein the temperature detection module comprises a temperature detection probe and a temperature detection processing circuit, the temperature detection probe is used for measuring the temperature of the surface of a detected device with higher precision and is embedded into a heat conduction plate of the temperature difference power generation device, a temperature analog signal is transmitted to the temperature detection processing circuit through a temperature analog signal transmission lead and is converted into a digital signal which is transmitted to the digital processing module, the vibration detection module comprises a vibration detection probe, a vibration detection processing circuit and the like, the contact part of the vibration detection probe and a metal shell is horizontal and is rigidly connected, the metal shell is rigidly connected with a metal base of the power generation device, a magnet mounting base, a self-powered module and a rechargeable battery in the temperature difference power generation device, Rigid connection between thermoelectric generation electricity core, heat-conducting plate, heat-conducting glue, the metal base guarantees that vibration test probe and equipment under test surface are rigid connection, rechargeable battery's fixed surface is connected with the battery case, the fixed surface of battery case is connected with the heat dissipation shell, the upside of heat dissipation shell is provided with the upper cover, the inner wall of heat dissipation shell is provided with the sealing washer, pass through fixed screw fixed connection between metal base and the heat-conducting glue.
3. The temperature difference self-powered temperature and vibration composite detection system according to claim 2, characterized in that: the vibration detection processing circuit processes vibration analog signals collected by the vibration detection probe, the vibration analog signals enter the data processing module through processing circuits such as anti-aliasing filtering, analog-to-digital conversion, low-pass filtering and the like, the data processing circuit analyzes the vibration digital signals processed by the vibration detection processing circuit in time domain and frequency domain, and outputs characteristic values such as acceleration peak value, speed effective value, displacement peak value, envelope value, skewness, kurtosis, margin, spectral variance, spectral mean value, spectral effective value and vibration analysis maps such as time domain spectrum, frequency domain spectrum, envelope spectrum, trajectory map and the like, the data processing circuit processes temperature algorithms processed by the temperature detection processing circuit, the digital processing circuit transmits processed vibration and temperature signals to a network and a cloud platform through the wireless communication module, the wireless communication module receives the characteristic values of vibration and temperature and various analysis waveforms sent by the data processing module, upload network and cloud platform to the order that receives to come from network and cloud platform carries out data interaction with data processing module, from unstable voltage and the electric current that thermoelectric generation device provided of self-power module receipt, convert the voltage and the electric current that can charge for the lithium cell that charges into steadily, give the lithium cell power supply that charges, rechargeable battery adopts lithium ion rechargeable battery, supplies power for temperature detection module, vibration detection module, data processing module, wireless communication module, and the stable voltage and the electric current that receive to come from self-power module to provide charge for oneself.
4. The temperature difference self-powered temperature and vibration composite detection system according to claim 1, characterized in that: the heat dissipation device is made of high-heat-conduction materials, the periphery of the heat dissipation device is designed to be in a sheet shape, and the heat dissipation area is increased.
5. A temperature difference self-powered temperature and vibration composite detection implementation method is characterized by comprising the following steps: the device comprises a temperature difference power generation device, an energy collection device and a power supply device.
6. The method for realizing the temperature difference self-powered temperature and vibration composite detection according to claim 5, wherein the method comprises the following steps: the thermoelectric power generation device mainly comprises a U2 thermoelectric power generation battery cell and an auxiliary circuit thereof, wherein the U2 thermoelectric power generation battery cell generates direct-current voltage by a PN junction between two ceramic plates by means of the temperature difference between an upper ceramic plate and a lower ceramic plate of the battery cell and by utilizing the Seebeck effect principle.
7. The method for realizing the temperature difference self-powered temperature and vibration composite detection according to claim 5, wherein the method comprises the following steps: the energy collecting device mainly comprises a U1 energy collecting module and an auxiliary circuit thereof, direct current voltage and current generated by the temperature difference generating device are unstable due to unstable temperature difference between an upper ceramic plate and a lower ceramic plate of the temperature difference generating cell, the energy collecting device collects the unstable direct current voltage and current and outputs the stable direct current voltage and the stable current C1 to be used for stabilizing the direct current voltage generated by the temperature difference generating device according to needs, C1 is close to a VIN pin of the U1 energy collecting module as much as possible, a connecting wire is as wide and short as possible, R3 is used for setting an optimal input voltage working point, an MPPC circuit in the U1 energy collecting module dynamically adjusts average inductive current to prevent the input voltage from being lower than an MPPC threshold value, when the VIN voltage is higher than the MPPC voltage, the inductive current is increased to know that the VIN voltage is pulled to the MPPC voltage set value, and when the VIN voltage is lower than the MPPC voltage, the inductive current is reduced, knowing that the voltage of VIN rises to the voltage set value VMPPC of MPPC, VMPPC is 10uA R3, the AUX circuit in the U1 energy harvesting module is the voltage circuit generated by the start-up circuit.
8. The method for realizing the temperature difference self-powered temperature and vibration composite detection according to claim 7, wherein the method comprises the following steps: the U1 energy collection module supplies power to the internal circuit of the energy collection module until the main output circuit VOUT reaches a set output voltage value, a capacitor C2 is arranged between the AUX circuit and the GND circuit and used for stabilizing the voltage of the AUX circuit, an SHDN circuit in the U1 energy collection module is used for controlling the whole energy collection module to be turned on and off, LDO and FBLDO circuits in the U1 energy collection module provide a low-power stable voltage output, when the VOUT circuit supplies power to the BT1 rechargeable lithium battery and the warm vibration composite detection circuit is not enough to supply power to the warm vibration composite detection circuit, the warm vibration composite detection circuit is supplied with power, the output voltage of the LDO circuit is set by resistors R4 and R5, VLDO is 1.005V (R4/R5+1), a PGOOD circuit in the U1 energy collection module is used for indicating the state of the U1 energy collection module, a VOUT circuit in the U1 energy collection module outputs voltage current and charges the BT1 rechargeable lithium battery, the voltage value output by the VOUT circuit is set by resistors R1 and R2, VOUT is 1.005V (R1/R2+1), and the inductor L1 needs to adopt a power inductor with a low DCR value.
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| CN115855162A (en) * | 2022-12-30 | 2023-03-28 | 南方电网数字电网研究院有限公司 | Self-energy-taking temperature and vibration sensor |
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