CN110260987B - Intelligent wireless transmission temperature sensing device - Google Patents
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- CN110260987B CN110260987B CN201910580967.4A CN201910580967A CN110260987B CN 110260987 B CN110260987 B CN 110260987B CN 201910580967 A CN201910580967 A CN 201910580967A CN 110260987 B CN110260987 B CN 110260987B
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses an intelligent wireless transmission temperature sensing device, which comprises a power supply control unit, a temperature measurement sensing unit and a wireless communication unit, wherein the power supply control unit is used for controlling the temperature of a power supply; the power supply management and control unit controls current transmission of a power supply, ensures energy supply of each unit, optimizes power supply distribution and use, maximizes economic benefits, collects temperature data of a measured field, transmits the measured data to the data processing module for data storage and preprocessing, wirelessly transmits and exchanges node data through the communication transmission module, transmits all data to the remote terminal for recording and analysis, and ensures safety and reliability of data transmission through the chaotic communication circuit. The invention realizes intelligent wireless transmission of temperature measurement data, not only ensures the continuous working time of the temperature sensing device, but also realizes wireless safe transmission of the measurement data through the chaotic communication circuit without adding extra software secrecy, and greatly improves the safety.
Description
Technical Field
The invention relates to a temperature measurement technology, in particular to an intelligent wireless transmission temperature sensing device.
Background
With the continuous development of the industrial production level, the temperature measurement technology is also becoming an important index of the technical level. Whether the common production in industry and agriculture, the field of national defense and aerospace which needs to accurately control the temperature, the accurate understanding of the temperature measurement value is more and more necessary.
In actual production and scientific research, more attention is paid to measurement and numerical processing of dynamic temperature. Because many temperature fields are in a severe measurement environment, if the dynamic temperature cannot be measured accurately in real time, damage to production equipment caused by the temperature is likely to occur, and even huge economic loss and casualties are caused. Therefore, a measurement study of the dynamic temperature is necessary.
Thermocouples have been favored as important devices in temperature measurement because of their high accuracy. However, in the measurement of dynamic temperature, it is difficult to directly and accurately measure the dynamic temperature at one time due to the fixity of the device. Meanwhile, due to the simple structure, the interference generated by the thermocouple measuring circuit or the measured field may greatly affect the measuring process of the thermocouple, which may further result in low accuracy of thermocouple measurement and reliability of measured values.
In order to better accomplish accurate measurement of dynamic temperature, further improvement and algorithmic research on conventional thermocouple measuring devices is required to accomplish more accurate and complete temperature measurement.
Disclosure of Invention
The purpose of the invention is as follows: an intelligent wireless transmission temperature sensing device is provided to solve the above problems.
The technical scheme is as follows: an intelligent wireless transmission temperature sensing device comprises a power supply control unit, a temperature measurement sensing unit and a wireless communication unit;
the power supply control unit can be mainly divided into an energy control module and a power supply circuit, the energy control module is used for controlling the energy provided by other units and providing reasonable data support for the current distribution of the power supply circuit, the energy control module is used for carrying out optimization analysis on the data use recorded by the energy used by each unit, abnormal data are eliminated, and the economic benefit maximization of the whole device is realized;
the temperature measurement sensing unit is used for measuring temperature data of a measured field by arranging a temperature detection circuit, preliminarily processing the temperature detection data by a data processing module and performing necessary transmission and storage work on the required measurement data;
the wireless communication unit is used for carrying out wireless transmission and exchange of node data through the communication transmission module, transmitting all data to the remote terminal for recording and analyzing, and ensuring the safety and reliability of data transmission through the chaotic communication circuit;
a power supply circuit, including a transformer TR1, a rectifier bridge BR1, an integrated circuit U1, an integrated circuit U2, an integrated circuit U3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a diode D9, a resistor R9, a field effect transistor Q9 and a field effect transistor Q9, wherein a first pin 1 of the transformer TR 9 is connected to an input voltage, a first pin 2 of the transformer TR 9 is connected to a first terminal of the rectifier bridge BR 583, the first pin of the rectifier bridge TR 9 is connected to a first terminal of the rectifier bridge BR 9, and a first terminal of the rectifier bridge BR 9 is connected to the first terminal of the first rectifier bridge BR 9, and a first terminal of the first rectifier bridge BR 36, One end of the capacitor C2 is connected to the 2 nd pin of the integrated circuit U1, the other end of the capacitor C1 is connected to the other end of the capacitor C2, the 1 st pin of the integrated circuit U1, one end of the capacitor C3 and one end of the capacitor C4, the 3 rd pin of the integrated circuit U1, the other end of the capacitor C3 and the other end of the capacitor C4 are connected, the 4 th pin of the rectifier bridge BR1 is connected to the anode of the diode D1 and one end of the resistor R1, the cathode of the diode D1 is connected to one end of the capacitor C5, one end of the capacitor C6 and the 1 st pin of the integrated circuit U2, the other end of the capacitor C5 is connected to the other end of the capacitor C6, the 2 nd pin of the integrated circuit U2, one end of the capacitor C7 and one end of the capacitor C8, and the 3 rd pin of the integrated circuit U2 is connected to the other end of the capacitor C7, The other end of the capacitor C8, the 1 st pin of the integrated circuit U3 and one end of the resistor R2 are connected, the 2 nd pin of the integrated circuit U3 and one end of the capacitor C13 and one end of the capacitor C14 are all grounded, the 3 rd pin of the integrated circuit U3 and the other end of the capacitor C13 and the other end of the capacitor C14 are all connected with an output voltage, the other end of the resistor R2 is respectively connected with one end of the resistor R3, one end of the capacitor C9, one end of the resistor R4, the drain of the field effect transistor Q3, one end of the capacitor C10, one end of the resistor R7, one end of the resistor R8, the cathode of the diode D2 and one end of the resistor R9, the other end of the resistor R3 is respectively connected with the source of the field effect transistor Q1 and the gate of the field effect transistor Q2, and the gate of the field effect transistor Q1 is connected with the other end of the resistor R1, the other end of the capacitor C9 is grounded, the source of the fet Q1 is grounded with the source of the fet Q2, one end of the resistor R5, one end of the resistor R6 and one end of the capacitor C11, the drain of the fet Q2 is connected to the other end of the resistor R4 and the source of the fet Q4, the source of the fet Q3 is connected to the other end of the resistor R5, the gate of the fet Q3 is connected to the other end of the resistor R6 and the drain of the fet Q4, the gate of the fet Q4 is connected to the other end of the capacitor C11 and the collector of the transistor Q5, the emitter of the transistor Q5 is connected to the other end of the resistor R7, the base of the transistor Q5 is connected to the other end of the resistor R8, the anode of the diode D2 and one end of the capacitor C12, the other end of the capacitor C10 is grounded, and the other end of the capacitor C12 is connected with the other end of the resistor R9;
temperature detection circuit, including operational amplifier U4: A. operational amplifier U4: B. operational amplifier U4: C. operational amplifier U4: D. a thermistor RT1, a resistor R1, a potentiometer RV1, a zener diode D1, a transistor Q1, and a transistor Q1, wherein a negative electrode of the zener diode D1, one end of the resistor R1, an emitter of the transistor Q1, one end of the resistor R1, and one end of the resistor R1 are connected, a positive electrode of the zener diode D1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the other end of the resistor R1, a 1 st pin of the potentiometer R1, and a 3 rd pin of the potentiometer R1, a base of the transistor Q1 is connected to a collector of the resistor R1, a collector RV1, a first pin of the potentiometer R1, and a potential computing amplifier U1: the non-inverting input end of A is connected, and the other end of the resistor R12 is respectively connected with the operational amplifier U4: an inverting input terminal of a, one end of the thermistor RT1 and one end of the resistor R13 are connected, and the other end of the resistor R13 is connected to the 1 st pin of the potentiometer RV2, the 3 rd pin of the potentiometer RV2 and the operational amplifier U4: b, the operational amplifier U4: b has its non-inverting input grounded, and the operational amplifier U4: the inverting input end of B is respectively connected with the 2 nd pin of the potentiometer RV2 and one end of the resistor R14, and the other end of the thermistor RT1 is respectively connected with the operational amplifier U4: the output end of A, the other end of the resistor R14 and one end of the resistor R15 are connected, and the other end of the resistor R15 is respectively connected with the 1 st pin of the potentiometer RV3, the 3 rd pin of the potentiometer RV3 and the operational amplifier U4: c, the inverting input terminal of the operational amplifier U4: c, a non-inverting input terminal thereof is connected to one end of the resistor R16, the other end of the resistor R16 is grounded, and the operational amplifier U4: the output end of C is connected with the 2 nd pin of the potentiometer RV3 and one end of the resistor R18 is connected with a temperature output signal, the other end of the resistor R17 is connected with the 1 st pin of the potentiometer RV4, the 2 nd pin of the potentiometer RV4 is grounded, and the 3 rd pin of the potentiometer RV4 is connected with the operational amplifier U4: d, the inverting input of the operational amplifier U4: d, the non-inverting input terminal of the D is connected to the other end of the resistor R18, and the operational amplifier U4: the output end of the D is connected with one end of the resistor R19, the other end of the resistor R19 is respectively connected with the negative electrode of the voltage-stabilizing diode D4 and the base electrode of the triode Q7, the positive electrode of the voltage-stabilizing diode D4 is connected with the emitting electrode of the triode Q7, and the collector electrode of the triode Q7 and the voltage VCC are both connected with a temperature transmission signal;
the chaotic communication circuit comprises a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, a resistor R30, a resistor R31, a resistor R32, a resistor R33, a resistor R34, a resistor R35, a resistor R36, a resistor R37, a resistor R38, a resistor R39, a resistor R40, a resistor R41, a resistor R42, a resistor R43, a resistor R44 and an operational amplifier U5: A. operational amplifier U5: B. operational amplifier U6: A. operational amplifier U6: B. operational amplifier U7: A. operational amplifier U7: B. operational amplifier U8: A. operational amplifier U8: B. operational amplifier U9: A. operational amplifier U9: B. operational amplifier U10: A. operational amplifier U10: B. a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18 and a capacitor C19, wherein one end of the resistor R20 is connected with one end of the resistor R27, one end of the capacitor C16 and the operational amplifier U7: the output end of B is connected with input transmission signal and sending signal, the other end of the resistor R20 is respectively connected with one end of the resistor R23 and the operational amplifier U5: the inverting input end of A is connected, and the other end of the resistor R23 is respectively connected with the operational amplifier U5: the output end of A is connected with the 1 st pin of the potentiometer RV5, and the operational amplifier U5: the non-inverting input terminal of a is connected to one end of the resistor R21 and one end of the resistor R22, respectively, the other end of the resistor R22 is grounded, and the 2 nd pin of the potentiometer RV5 is connected to the 3 rd pin of the potentiometer RV5, one end of the capacitor C15, and the operational amplifier U5: b, the inverting input of the operational amplifier U5: b has a non-inverting input terminal grounded, and the other end of the capacitor C15 is connected to the other end of the resistor R21 and the operational amplifier U5: b and the operational amplifier U6: a non-inverting input terminal of a, and the operational amplifier U6: the inverting input end of a is respectively connected with one end of the resistor R24 and one end of the resistor R25, the other end of the resistor R24 is grounded, and the other end of the resistor R25 is respectively connected with the operational amplifier U6: the output end of A is connected with one end of the resistor R26, the other end of the resistor R26 is connected with the 3 rd pin of the potentiometer RV6, the 2 nd pin of the potentiometer RV6 is grounded, the 1 st pin of the potentiometer RV6 is connected with the operational amplifier U6: b, the non-inverting input terminal of the operational amplifier U6: b has its inverting input terminal connected to the other end of the resistor R27 and one end of the resistor R28, respectively, and the operational amplifier U6: the output end of the resistor B is connected to the other end of the resistor R28 and one end of the resistor R29, respectively, and the other end of the resistor R29 is connected to one end of the resistor R30 and the operational amplifier U7: a inverting input terminal of a, the operational amplifier U7: the non-inverting input end of A is grounded, and the operational amplifier U7: the output end of a is respectively connected with the other end of the resistor R30 and one end of the resistor R31, and the other end of the resistor R31 is respectively connected with the other end of the capacitor C16 and the operational amplifier U7: b, the inverting input of the operational amplifier U7: the non-inverting input terminal of B is grounded.
According to an aspect of the present invention, the integrated circuit U1 is a voltage regulator integrated circuit 7915, the integrated circuit U2 is a voltage regulator integrated circuit 7815, and the integrated circuit U1 is a voltage regulator integrated circuit 7805, so as to avoid the fluctuation of the power supply voltage and ensure the stable output during the distribution of the power supply voltage.
According to one aspect of the invention, the fet Q1, the fet Q2, the fet Q3, the fet Q4 and the fet Q5 utilize their own electric field reversal characteristics, and when the voltage conversion data is within a safe range, the fet Q2 stably accumulates positive charges on the gate, otherwise negative charges are accumulated, thereby updating the voltage real-time change data.
According to one aspect of the invention, the operational amplifier U4: A. the operational amplifier U4: B. the operational amplifier U4: C. the operational amplifier U4: d are all operational amplifiers LM324, the reference voltage of the power supply circuit is applied to the operational amplifier U4: d, the operational amplifier U4: the output of a passes through the operational amplifier U4: c forms a comparison voltage to the operational amplifier U4: and the non-inverting input end of the D is compared with the reference voltage of the power supply circuit, the comparison voltage is increased to conduct the triode Q7, a transmission signal is output, and meanwhile, a temperature signal is sent to the data processing module.
According to one aspect of the invention, the thermistor RT1 is added to the operational amplifier U4: a, so that by changing the operational amplifier U4: the amount of negative feedback of a changes its gain.
According to one aspect of the present invention, the potentiometer RV1, the potentiometer RV2, the potentiometer RV3 and the potentiometer RV4 are all linear potentiometers, and the potentiometer RV1 controls the operational amplifier U4: a, and the potentiometer RV2 is added to the operational amplifier U4: b, so that by changing the operational amplifier U4: b to change its gain, the potentiometer RV3 is added to the operational amplifier U4: c, so that by changing the operational amplifier U4: c to change its gain, the potentiometer RV4 changes the gain applied to the operational amplifier U4: d, the reference voltage at the inverting input.
According to an aspect of the present invention, the transistor Q6, by utilizing its electric field reversal characteristics, accumulates positive charges on the base, and ensures that the operational amplifier U4: the comparison voltages of a are different.
According to one aspect of the invention, the temperature transmission signal is generated when the measured temperature is deemed to be recorded as the current reaches the operating point under the control of the transistor Q7.
According to one aspect of the invention, the communication transmission module comprises Bluetooth, WiFi, zigbee, z-wave or 433MHz for establishing wireless communication.
Has the advantages that: the invention can solve the problem of temperature measurement data loss caused by the fact that the measurement data can not be stored for a long time and the transmission mode is not safe enough in the temperature measurement process in the prior art, and respectively completes the remote uploading and protection of the real-time temperature data through the chaotic communication circuit, thereby enhancing the integrity and the reliability of the temperature measurement. Details will be described below.
Drawings
Fig. 1 is a block diagram of the present invention.
Fig. 2 is a schematic diagram of the power supply circuit of the present invention.
Fig. 3 is a schematic diagram of the temperature detection circuit of the present invention.
Fig. 4 is a schematic diagram of a chaotic communication circuit according to the present invention.
Detailed Description
As shown in fig. 1, in this embodiment, an intelligent wireless transmission temperature sensing device includes a power supply control unit, a temperature measurement sensing unit, and a wireless communication unit;
the power supply control unit can be mainly divided into an energy control module and a power supply circuit, the energy control module is used for controlling the energy provided by other units and providing reasonable data support for the current distribution of the power supply circuit, the energy control module is used for carrying out optimization analysis on the data use recorded by the energy used by each unit, abnormal data are eliminated, and the economic benefit maximization of the whole device is realized;
the temperature measurement sensing unit is used for measuring temperature data of a measured field by arranging a temperature detection circuit, preliminarily processing the temperature detection data by a data processing module and performing necessary transmission and storage work on the required measurement data;
the wireless communication unit is used for carrying out wireless transmission and exchange of node data through the communication transmission module, transmitting all data to the remote terminal for recording and analyzing, and ensuring the safety and reliability of data transmission through the chaotic communication circuit;
as shown in fig. 2, the power circuit includes a transformer TR1, a rectifier bridge BR1, an integrated circuit U1, an integrated circuit U2, an integrated circuit U3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a diode D13, a resistor R13, a field effect transistor Q13, and a field effect transistor Q13, wherein a first pin 1 of the transformer TR 13 is connected to an input voltage, a second pin 2 of the transformer TR 13 is connected to a first pin BR 3 of the rectifier bridge TR 13, and a first pin of the rectifier bridge BR 3 is connected to the first pin of the transformer TR 13, a 1 st pin of the rectifier bridge BR1 is respectively connected to one end of the capacitor C1, one end of the capacitor C2 and a 2 nd pin of the integrated circuit U1, the other end of the capacitor C1 is connected to the other end of the capacitor C2, the 1 st pin of the integrated circuit U1, one end of the capacitor C3 and one end of the capacitor C4, which are all grounded, a 3 rd pin of the integrated circuit U1, the other end of the capacitor C3 and the other end of the capacitor C4 are connected, a 4 th pin of the rectifier bridge BR1 is respectively connected to an anode of the diode D1 and one end of the resistor R1, a cathode of the diode D1 is respectively connected to one end of the capacitor C5, one end of the capacitor C6 and the 1 st pin of the integrated circuit U2, and the other end of the capacitor C5 is respectively connected to the other end of the capacitor C6, the 2 nd pin of the integrated circuit U2, the one end of the capacitor C7 and one end of the capacitor C8, the 3 rd pin of the integrated circuit U2 is connected to the other end of the capacitor C7, the other end of the capacitor C8, the 1 st pin of the integrated circuit U3 and one end of the resistor R2, the 2 nd pin of the integrated circuit U3, one end of the capacitor C13 and one end of the capacitor C14 are all grounded, the 3 rd pin of the integrated circuit U3, the other end of the capacitor C13 and the other end of the capacitor C14 are all connected to an output voltage, the other end of the resistor R2 is connected to one end of the resistor R3, one end of the capacitor C9, one end of the resistor R4, the drain of the fet Q3, one end of the capacitor C10, one end of the resistor R7, one end of the resistor R8, the cathode of the diode D9 and one end of the resistor R6862, the other end of the resistor R3 is connected to the source of the fet Q1 and the gate 86q 27, the gate of the fet Q1 is connected to the other end of the resistor R1, the other end of the capacitor C9 is grounded, the source of the fet Q1 is connected to the source of the fet Q2, one end of the resistor R5, one end of the resistor R6, and one end of the capacitor C11 are grounded, the drain of the fet Q2 is connected to the other end of the resistor R4 and the source of the fet Q4, the source of the fet Q3 is connected to the other end of the resistor R5, the gate of the fet Q3 is connected to the other end of the resistor R6 and the drain of the fet Q4, the gate of the fet Q4 is connected to the other end of the capacitor C11 and the collector of the transistor Q5, the emitter of the transistor Q5 is connected to the other end of the resistor R7, and the base of the transistor Q5 is connected to the other end of the resistor R8 and the other end of the resistor R8, respectively, The anode of the diode D2 is connected with one end of the capacitor C12, the other end of the capacitor C10 is grounded, and the other end of the capacitor C12 is connected with the other end of the resistor R9;
as shown in fig. 3, the temperature detection circuit includes an operational amplifier U4: A. operational amplifier U4: B. operational amplifier U4: C. operational amplifier U4: D. a thermistor RT1, a resistor R1, a potentiometer RV1, a zener diode D1, a transistor Q1, and a transistor Q1, wherein a negative electrode of the zener diode D1, one end of the resistor R1, an emitter of the transistor Q1, one end of the resistor R1, and one end of the resistor R1 are connected, a positive electrode of the zener diode D1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the other end of the resistor R1, a 1 st pin of the potentiometer R1, and a 3 rd pin of the potentiometer R1, a base of the transistor Q1 is connected to a collector of the resistor R1, a collector RV1, a first pin of the potentiometer R1, and a potential computing amplifier U1: the non-inverting input end of A is connected, and the other end of the resistor R12 is respectively connected with the operational amplifier U4: an inverting input terminal of a, one end of the thermistor RT1 and one end of the resistor R13 are connected, and the other end of the resistor R13 is connected to the 1 st pin of the potentiometer RV2, the 3 rd pin of the potentiometer RV2 and the operational amplifier U4: b, the operational amplifier U4: b has its non-inverting input grounded, and the operational amplifier U4: the inverting input end of B is respectively connected with the 2 nd pin of the potentiometer RV2 and one end of the resistor R14, and the other end of the thermistor RT1 is respectively connected with the operational amplifier U4: the output end of A, the other end of the resistor R14 and one end of the resistor R15 are connected, and the other end of the resistor R15 is respectively connected with the 1 st pin of the potentiometer RV3, the 3 rd pin of the potentiometer RV3 and the operational amplifier U4: c, the inverting input terminal of the operational amplifier U4: c, a non-inverting input terminal thereof is connected to one end of the resistor R16, the other end of the resistor R16 is grounded, and the operational amplifier U4: the output end of C is connected with the 2 nd pin of the potentiometer RV3 and one end of the resistor R18 is connected with a temperature output signal, the other end of the resistor R17 is connected with the 1 st pin of the potentiometer RV4, the 2 nd pin of the potentiometer RV4 is grounded, and the 3 rd pin of the potentiometer RV4 is connected with the operational amplifier U4: d, the inverting input of the operational amplifier U4: d, the non-inverting input terminal of the D is connected to the other end of the resistor R18, and the operational amplifier U4: the output end of the D is connected with one end of the resistor R19, the other end of the resistor R19 is respectively connected with the negative electrode of the voltage-stabilizing diode D4 and the base electrode of the triode Q7, the positive electrode of the voltage-stabilizing diode D4 is connected with the emitting electrode of the triode Q7, and the collector electrode of the triode Q7 and the voltage VCC are both connected with a temperature transmission signal;
as shown in fig. 4, the chaotic communication circuit includes a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, a resistor R30, a resistor R31, a resistor R32, a resistor R33, a resistor R34, a resistor R35, a resistor R36, a resistor R37, a resistor R38, a resistor R39, a resistor R40, a resistor R41, a resistor R42, a resistor R43, a resistor R44, and an operational amplifier U5: A. operational amplifier U5: B. operational amplifier U6: A. operational amplifier U6: B. operational amplifier U7: A. operational amplifier U7: B. operational amplifier U8: A. operational amplifier U8: B. operational amplifier U9: A. operational amplifier U9: B. operational amplifier U10: A. operational amplifier U10: B. a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18 and a capacitor C19, wherein one end of the resistor R20 is connected with one end of the resistor R27, one end of the capacitor C16 and the operational amplifier U7: the output end of B is connected with input transmission signal and sending signal, the other end of the resistor R20 is respectively connected with one end of the resistor R23 and the operational amplifier U5: the inverting input end of A is connected, and the other end of the resistor R23 is respectively connected with the operational amplifier U5: the output end of A is connected with the 1 st pin of the potentiometer RV5, and the operational amplifier U5: the non-inverting input terminal of a is connected to one end of the resistor R21 and one end of the resistor R22, respectively, the other end of the resistor R22 is grounded, and the 2 nd pin of the potentiometer RV5 is connected to the 3 rd pin of the potentiometer RV5, one end of the capacitor C15, and the operational amplifier U5: b, the inverting input of the operational amplifier U5: b has a non-inverting input terminal grounded, and the other end of the capacitor C15 is connected to the other end of the resistor R21 and the operational amplifier U5: b and the operational amplifier U6: a non-inverting input terminal of a, and the operational amplifier U6: the inverting input end of a is respectively connected with one end of the resistor R24 and one end of the resistor R25, the other end of the resistor R24 is grounded, and the other end of the resistor R25 is respectively connected with the operational amplifier U6: the output end of A is connected with one end of the resistor R26, the other end of the resistor R26 is connected with the 3 rd pin of the potentiometer RV6, the 2 nd pin of the potentiometer RV6 is grounded, the 1 st pin of the potentiometer RV6 is connected with the operational amplifier U6: b, the non-inverting input terminal of the operational amplifier U6: b has its inverting input terminal connected to the other end of the resistor R27 and one end of the resistor R28, respectively, and the operational amplifier U6: the output end of the resistor B is connected to the other end of the resistor R28 and one end of the resistor R29, respectively, and the other end of the resistor R29 is connected to one end of the resistor R30 and the operational amplifier U7: a inverting input terminal of a, the operational amplifier U7: the non-inverting input end of A is grounded, and the operational amplifier U7: the output end of a is respectively connected with the other end of the resistor R30 and one end of the resistor R31, and the other end of the resistor R31 is respectively connected with the other end of the capacitor C16 and the operational amplifier U7: b, the inverting input of the operational amplifier U7: the non-inverting input terminal of B is grounded.
In a further embodiment, the integrated circuit U1 is a voltage regulator integrated circuit 7915, the integrated circuit U2 is a voltage regulator integrated circuit 7815, and the integrated circuit U3 is a voltage regulator integrated circuit 7805, so that fluctuation of the power supply voltage is avoided, and stable output during power supply voltage distribution is ensured.
In a further embodiment, the fet Q1, the fet Q2, the fet Q3, the fet Q4 and the fet Q5 utilize their own electric field reversal characteristics, and when the voltage conversion data is within a safe range, the fet Q2 stably accumulates positive charges on the gate, otherwise negative charges are accumulated, thereby updating the voltage real-time change data.
In a further embodiment, the capacitor C12 and the diode D2 form a protection circuit in the circuit to prevent the circuit from being affected by excessive current caused by transient high temperature.
In a further embodiment, the operational amplifier U4: A. the operational amplifier U4: B. the operational amplifier U4: C. the operational amplifier U4: d are all operational amplifiers LM324, the reference voltage of the power supply circuit is applied to the operational amplifier U4: d, the operational amplifier U4: the output of a passes through the operational amplifier U4: c forms a comparison voltage to the operational amplifier U4: and the non-inverting input end of the D is compared with the reference voltage of the power supply circuit, the comparison voltage is increased to conduct the triode Q7, a transmission signal is output, and meanwhile, a temperature signal is sent to the data processing module.
In a further embodiment, the zener diode D3 ensures that the output voltage is switched in stably.
In a further embodiment, the thermistor RT1 is added to the operational amplifier U4: a, so that by changing the operational amplifier U4: the amount of negative feedback of a changes its gain.
In a further embodiment, the resistor R10, the resistor R11 and the transistor Q6 form a noise removal circuit, so that interference of circuit operation on measurement can be avoided.
In a further embodiment, the potentiometer RV1, the potentiometer RV2, the potentiometer RV3 and the potentiometer RV4 are all linear potentiometers, and the potentiometer RV1 controls the operational amplifier U4: a, and the potentiometer RV2 is added to the operational amplifier U4: b, so that by changing the operational amplifier U4: b to change its gain, the potentiometer RV3 is added to the operational amplifier U4: c, so that by changing the operational amplifier U4: c to change its gain, the potentiometer RV4 changes the gain applied to the operational amplifier U4: d, the reference voltage at the inverting input.
In a further embodiment, the transistor Q6, utilizing its electric field reversal characteristics, accumulates positive charges on the base, and ensures that the operational amplifier U4: the comparison voltages of a are different.
In a further embodiment, the communication transmission module comprises Bluetooth, WiFi, zigbee, z-wave or 433MHz for establishing wireless communication.
In summary, the present invention has the following advantages: in the face of temperature measurement, the voltage comparison branch of the temperature detection circuit is arranged, so that data transmission can be guaranteed after the measured temperature reaches a specific value, and the remote transmission of the measured data of the temperature can be completed relatively safely by combining the chaotic communication circuit under the wireless communication unit, so that a reference is further provided for temperature data processing. Overall, the invention can ensure that the data transmission is carried out after the measured temperature reaches a specific value, and the remote transmission mode is used to replace the measurement and calculation of a simple sensor on the temperature, thereby strengthening the combination with the chaotic dynamic characteristic in the remote transmission process and improving the reliability and reliability of the temperature measurement transmission.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (9)
1. An intelligent wireless transmission temperature sensing device comprises a power supply control unit, a temperature measurement sensing unit and a wireless communication unit;
the power supply control unit is divided into an energy control module and a power supply circuit, the energy control module is used for controlling the energy provided by other units and providing reasonable data support for current distribution of the power supply circuit, the energy control module is used for carrying out optimization analysis on the data use recorded by the energy used by each unit, abnormal data are eliminated, and the economic benefit maximization of the whole device is realized;
the temperature measurement sensing unit is used for measuring temperature data of a measured field by arranging a temperature detection circuit, preliminarily processing the temperature detection data by a data processing module and performing necessary transmission and storage work on the required measurement data;
the wireless communication unit is used for carrying out wireless transmission and exchange of node data through the communication transmission module, transmitting all data to the remote terminal for recording and analyzing, and ensuring the safety and reliability of data transmission through the chaotic communication circuit;
a power supply circuit, including a transformer TR1, a rectifier bridge BR1, an integrated circuit U1, an integrated circuit U2, an integrated circuit U3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a diode D9, a resistor R9, a field effect transistor Q9 and a triode Q9, wherein a first pin 1 of the transformer TR 9 is connected to an input voltage, a first pin 2 of the transformer TR 9 is connected to the first pin BR 3 of the rectifier bridge BR 5872, and a first terminal of the rectifier bridge BR 9 is connected to the first pin of the rectifier bridge BR 9, and a first terminal of the first pin of the first rectifier bridge BR 9 is connected to the first terminal of, One end of the capacitor C2 is connected to the 2 nd pin of the integrated circuit U1, the other end of the capacitor C1 is connected to the other end of the capacitor C2, the 1 st pin of the integrated circuit U1, one end of the capacitor C3 and one end of the capacitor C4, the 3 rd pin of the integrated circuit U1, the other end of the capacitor C3 and the other end of the capacitor C4 are connected, the 4 th pin of the rectifier bridge BR1 is connected to the anode of the diode D1 and one end of the resistor R1, the cathode of the diode D1 is connected to one end of the capacitor C5, one end of the capacitor C6 and the 1 st pin of the integrated circuit U2, the other end of the capacitor C5 is connected to the other end of the capacitor C6, the 2 nd pin of the integrated circuit U2, one end of the capacitor C7 and one end of the capacitor C8, and the 3 rd pin of the integrated circuit U2 is connected to the other end of the capacitor C7, The other end of the capacitor C8, the 1 st pin of the integrated circuit U3 and one end of the resistor R2 are connected, the 2 nd pin of the integrated circuit U3 and one end of the capacitor C13 and one end of the capacitor C14 are all grounded, the 3 rd pin of the integrated circuit U3 and the other end of the capacitor C13 and the other end of the capacitor C14 are all connected with an output voltage, the other end of the resistor R2 is respectively connected with one end of the resistor R3, one end of the capacitor C9, one end of the resistor R4, the drain of the field effect transistor Q3, one end of the capacitor C10, one end of the resistor R7, one end of the resistor R8, the cathode of the diode D2 and one end of the resistor R9, the other end of the resistor R3 is respectively connected with the source of the field effect transistor Q1 and the gate of the field effect transistor Q2, and the gate of the field effect transistor Q1 is connected with the other end of the resistor R1, the other end of the capacitor C9 is grounded, the source of the fet Q1 is grounded with the source of the fet Q2, one end of the resistor R5, one end of the resistor R6 and one end of the capacitor C11, the drain of the fet Q2 is connected to the other end of the resistor R4 and the source of the fet Q4, the source of the fet Q3 is connected to the other end of the resistor R5, the gate of the fet Q3 is connected to the other end of the resistor R6 and the drain of the fet Q4, the gate of the fet Q4 is connected to the other end of the capacitor C11 and the collector of the transistor Q5, the emitter of the transistor Q5 is connected to the other end of the resistor R7, the base of the transistor Q5 is connected to the other end of the resistor R8, the anode of the diode D2 and one end of the capacitor C12, the other end of the capacitor C10 is grounded, and the other end of the capacitor C12 is connected with the other end of the resistor R9;
temperature detection circuit, including operational amplifier U4: A. operational amplifier U4: B. operational amplifier U4: C. operational amplifier U4: D. a thermistor RT1, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a potentiometer RV1, a potentiometer RV2, a potentiometer RV3, a potentiometer RV4, a voltage-stabilizing diode D3, a voltage-stabilizing diode D4, a triode Q6 and a triode Q7, the cathode of the voltage-stabilizing diode D3, one end of the resistor R10, the emitter of the triode Q6, one end of the resistor R12 and one end of the resistor R17 are connected, the anode of the voltage-stabilizing diode D3 is connected with one end of the resistor R11, the other end of the resistor R10 is respectively connected with the other end of the resistor R11, the 1 st pin of the potentiometer RV1 and the 3 rd pin of the potentiometer RV1, the base of the triode Q6 is connected with the collector of the triode Q6, the 2 nd pin of the potentiometer RV1 and the operational amplifier U4: the non-inverting input end of A is connected, and the other end of the resistor R12 is respectively connected with the operational amplifier U4: an inverting input terminal of a, one end of the thermistor RT1 and one end of the resistor R13 are connected, and the other end of the resistor R13 is connected to the 1 st pin of the potentiometer RV2, the 3 rd pin of the potentiometer RV2 and the operational amplifier U4: b, the operational amplifier U4: b has its non-inverting input grounded, and the operational amplifier U4: the inverting input end of B is respectively connected with the 2 nd pin of the potentiometer RV2 and one end of the resistor R14, and the other end of the thermistor RT1 is respectively connected with the operational amplifier U4: the output end of A, the other end of the resistor R14 and one end of the resistor R15 are connected, and the other end of the resistor R15 is respectively connected with the 1 st pin of the potentiometer RV3, the 3 rd pin of the potentiometer RV3 and the operational amplifier U4: c, the inverting input terminal of the operational amplifier U4: c, a non-inverting input terminal thereof is connected to one end of the resistor R16, the other end of the resistor R16 is grounded, and the operational amplifier U4: the output end of C is connected with the 2 nd pin of the potentiometer RV3 and one end of the resistor R18 is connected with a temperature output signal, the other end of the resistor R17 is connected with the 1 st pin of the potentiometer RV4, the 2 nd pin of the potentiometer RV4 is grounded, and the 3 rd pin of the potentiometer RV4 is connected with the operational amplifier U4: d, the inverting input of the operational amplifier U4: d, the non-inverting input terminal of the D is connected to the other end of the resistor R18, and the operational amplifier U4: the output end of the D is connected with one end of the resistor R19, the other end of the resistor R19 is respectively connected with the negative electrode of the voltage-stabilizing diode D4 and the base electrode of the triode Q7, the positive electrode of the voltage-stabilizing diode D4 is connected with the emitting electrode of the triode Q7, and the collector electrode of the triode Q7 and the voltage VCC are both connected with a temperature transmission signal;
the chaotic communication circuit comprises a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, a resistor R30, a resistor R31, a resistor R32, a resistor R33, a resistor R34, a resistor R35, a resistor R36, a resistor R37, a resistor R38, a resistor R39, a resistor R40, a resistor R41, a resistor R42, a resistor R43, a resistor R44, a potentiometer RV5, a potentiometer RV6 and an operational amplifier U5: A. operational amplifier U5: B. operational amplifier U6: A. operational amplifier U6: B. operational amplifier U7: A. operational amplifier U7: B. operational amplifier U8: A. operational amplifier U8: B. operational amplifier U9: A. operational amplifier U9: B. operational amplifier U10: A. operational amplifier U10: B. a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18 and a capacitor C19, wherein one end of the resistor R20 is connected with one end of the resistor R27, one end of the capacitor C16 and the operational amplifier U7: the output end of B is connected with input transmission signal and sending signal, the other end of the resistor R20 is respectively connected with one end of the resistor R23 and the operational amplifier U5: the inverting input end of A is connected, and the other end of the resistor R23 is respectively connected with the operational amplifier U5: the output end of A is connected with the 1 st pin of the potentiometer RV5, and the operational amplifier U5: the non-inverting input terminal of a is connected to one end of the resistor R21 and one end of the resistor R22, respectively, the other end of the resistor R22 is grounded, and the 2 nd pin of the potentiometer RV5 is connected to the 3 rd pin of the potentiometer RV5, one end of the capacitor C15, and the operational amplifier U5: b, the inverting input of the operational amplifier U5: b has a non-inverting input terminal grounded, and the other end of the capacitor C15 is connected to the other end of the resistor R21 and the operational amplifier U5: b and the operational amplifier U6: a non-inverting input terminal of a, and the operational amplifier U6: the inverting input end of a is respectively connected with one end of the resistor R24 and one end of the resistor R25, the other end of the resistor R24 is grounded, and the other end of the resistor R25 is respectively connected with the operational amplifier U6: the output end of A is connected with one end of the resistor R26, the other end of the resistor R26 is connected with the 3 rd pin of the potentiometer RV6, the 2 nd pin of the potentiometer RV6 is grounded, the 1 st pin of the potentiometer RV6 is connected with the operational amplifier U6: b, the non-inverting input terminal of the operational amplifier U6: b has its inverting input terminal connected to the other end of the resistor R27 and one end of the resistor R28, respectively, and the operational amplifier U6: the output end of the resistor B is connected to the other end of the resistor R28 and one end of the resistor R29, respectively, and the other end of the resistor R29 is connected to one end of the resistor R30 and the operational amplifier U7: a inverting input terminal of a, the operational amplifier U7: the non-inverting input end of A is grounded, and the operational amplifier U7: the output end of a is respectively connected with the other end of the resistor R30 and one end of the resistor R31, and the other end of the resistor R31 is respectively connected with the other end of the capacitor C16 and the operational amplifier U7: b, the inverting input of the operational amplifier U7: the non-inverting input terminal of B is grounded.
2. The device as claimed in claim 1, wherein the integrated circuit U1 is a voltage regulator integrated circuit 7915, the integrated circuit U2 is a voltage regulator integrated circuit 7815, and the integrated circuit U3 is a voltage regulator integrated circuit 7805, so as to avoid fluctuation of the power supply voltage and ensure stable output during power supply voltage distribution.
3. The intelligent wireless transmission temperature sensing device as claimed in claim 1, wherein the fet Q1, the fet Q2, the fet Q3, the fet Q4 and the fet Q5 utilize their own electric field reversal characteristics, and when the voltage conversion data is within a safe range, the fet Q2 stably accumulates positive charges on the gate, otherwise accumulates negative charges, thereby updating the voltage real-time change data.
4. The intelligent wireless transmission temperature sensing device according to claim 1, wherein the operational amplifier U4: A. the operational amplifier U4: B. the operational amplifier U4: C. the operational amplifier U4: d are all operational amplifiers LM324, the reference voltage of the power supply circuit is applied to the operational amplifier U4: d, the operational amplifier U4: the output of a passes through the operational amplifier U4: c forms a comparison voltage to the operational amplifier U4: and the non-inverting input end of the D is compared with the reference voltage of the power supply circuit, the comparison voltage is increased to conduct the triode Q7, a transmission signal is output, and meanwhile, a temperature signal is sent to the data processing module.
5. The intelligent wireless transmission temperature sensing device as claimed in claim 1, wherein the thermistor RT1 is added to the operational amplifier U4: a, so that by changing the operational amplifier U4: the amount of negative feedback of a changes the gain of the negative feedback loop.
6. The intelligent wireless transmission temperature sensing device according to claim 1, wherein the potentiometer RV1, the potentiometer RV2, the potentiometer RV3 and the potentiometer RV4 are all linear potentiometers, and the potentiometer RV1 controls the operational amplifier U4: a, and the potentiometer RV2 is added to the operational amplifier U4: b, so that by changing the operational amplifier U4: b, the potentiometer RV3 is added to the operational amplifier U4: c, so that by changing the operational amplifier U4: c to change the gain of the negative feedback loop, the potentiometer RV4 changes the gain applied to the operational amplifier U4: d, the reference voltage at the inverting input.
7. The intelligent wireless transmission temperature sensing device according to claim 1, wherein the transistor Q6, by utilizing its electric field reversal characteristics, accumulates positive charge on the base, and ensures that the operational amplifier U4: the comparison voltages of a are different.
8. The intelligent wireless transmission temperature sensing device as claimed in claim 1, wherein under the control of the transistor Q7, when the current reaches the operating point, the measured temperature is considered to be required to be recorded, and a temperature transmission signal is sent.
9. The intelligent wireless transmission temperature sensing device of claim 1, wherein the communication transmission module comprises bluetooth, WiFi, zigbee, z-wave or 433MHz to establish wireless communication.
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