CN109647637B - Wireless device for real-time measurement of in-situ temperature of high-speed centrifugal equipment - Google Patents
Wireless device for real-time measurement of in-situ temperature of high-speed centrifugal equipment Download PDFInfo
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- CN109647637B CN109647637B CN201910091279.1A CN201910091279A CN109647637B CN 109647637 B CN109647637 B CN 109647637B CN 201910091279 A CN201910091279 A CN 201910091279A CN 109647637 B CN109647637 B CN 109647637B
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- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
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Abstract
The invention relates to a wireless device for measuring the in-situ temperature of high-speed centrifugal equipment in real time, which is characterized by comprising a wireless temperature measuring device and a wireless receiving device, wherein the wireless temperature measuring device comprises a mass balancer, a temperature measuring sensor and a temperature correcting device; the quality balancer is arranged on one side of the centrifugal main part, a centrifugal assembly to be tested is arranged on the other side of the centrifugal main part, and the quality balancer is used for carrying out quality balancing on the wireless temperature measuring device and the centrifugal assembly to be tested, so that the wireless temperature measuring device can be placed in the centrifugal main part to carry out centrifugal motion; the temperature measurement sensor and the temperature correction device are both arranged on the centrifugal main part at the same side or the opposite side of the centrifugal component to be measured, the temperature measurement sensor is connected with the temperature correction device, and the temperature correction device is wirelessly connected with the wireless receiving device.
Description
Technical Field
The invention relates to a device for measuring the temperature of centrifugal equipment, in particular to a wireless device for measuring the in-situ temperature of high-speed centrifugal equipment in real time.
Background
In life sciences and clinical diagnostic instruments, centrifugal equipment is often used, including centrifuges, centrifugal dehydrators, centrifugal extractors, centrifugal fans, centrifugal microfluidic analyzers, and the like. After the centrifugal motor rotates, the actual temperature of the sample in the centrifugal assembly (such as a centrifuge tube, an extraction tube, a microfluidic chip, etc.) rises by several degrees due to the heat generated by the motor and the heat generated by the high-speed friction between the rotor and the air, and the temperature change along with the rotation speed is a dynamic process. In the biochemical related reaction, a large amount of enzyme-catalyzed reaction processes are involved, which are sensitive to the temperature environment of the enzyme, so that the actual reaction temperature of the sample needs to be monitored in real time.
Because the centrifugal component needs to rotate along with the centrifugal main component (such as a rotating wheel, a rotating drum, a turntable or a tray), the common real-time temperature measurement method of the existing centrifugal equipment is to attach a temperature sensor to the side wall of the centrifugal chamber and measure the temperature of the cavity in the centrifugal equipment so as to indirectly obtain the actual temperature of the sample in the centrifugal component. However, because of the temperature gradient existing in the centrifugal device, a certain temperature difference exists between the temperature of the cavity in the centrifugal device and the actual temperature of the sample. In order to eliminate the temperature difference, a method is usually adopted in which the cavity temperature measured by the temperature sensor is compensated, and a difference model between the cavity temperature and the actual temperature of the sample is established.
In addition to the indirect measurement described above, another way is to measure the temperature within the centrifuge assembly directly, i.e. to make an in situ measurement of the temperature. However, since the assembly is in high-speed rotational motion, there is a need to solve the problem of data transmission in motion. The existing methods can be divided into a wired measurement method and a wireless measurement method, wherein the wired measurement method can realize the transmission of electric signals in rotation by arranging a temperature sensor in a centrifugal assembly and arranging an electric brush slip ring through the axle center of a motor, but the mode has large friction in high-speed rotation and the measurement data is easily interfered; the wireless temperature measurement method generally adopts an infrared wireless temperature measurement mode, and the mode is a non-contact temperature measurement method, and has a series of problems of large measurement error, large influence of reflection coefficient of an irradiated surface, lack of real-time property of temperature feedback lag and the like. Therefore, the prior art cannot provide a measuring method with in-situ direct measurement, accurate data, stability, reliability and real-time transmission.
Disclosure of Invention
In view of the above problems, the present invention provides a wireless device for real-time measurement of in-situ temperature of high-speed centrifugal equipment, which can realize direct in-situ measurement, accurate data, stability, reliability and real-time transmission.
In order to achieve the purpose, the invention adopts the following technical scheme: a wireless device for real-time measurement of in-situ temperature of high-speed centrifugal equipment is characterized by comprising a wireless temperature measuring device and a wireless receiving device, wherein the wireless temperature measuring device comprises a mass balancer, a temperature measuring sensor and a temperature correcting device; the quality balancer is arranged on one side of the centrifugal main part, a centrifugal assembly to be tested is arranged on the other side of the centrifugal main part, and the quality balancer is used for carrying out quality balancing on the wireless temperature measuring device and the centrifugal assembly to be tested, so that the wireless temperature measuring device can be placed in the centrifugal main part to carry out centrifugal motion; the temperature measurement sensor and the temperature correction device are both arranged on the centrifugal main part at the same side or the opposite side of the centrifugal component to be measured, the temperature measurement sensor is connected with the temperature correction device, the temperature measurement sensor is used for measuring the temperature value of the centrifugal component to be measured in real time, and the temperature correction device is used for calibrating the temperature value of the centrifugal component to be measured to obtain the real temperature value of the centrifugal component to be measured; the temperature correction device is in wireless connection with the wireless receiving device, and the wireless receiving device is used for wirelessly receiving the real temperature value of the centrifugal assembly to be measured and transmitting the real temperature value to the computer terminal.
Preferably, the temperature correction device comprises a first circuit board, a power supply battery, a direct current stabilized power supply, a data acquisition chip, a microprocessor, a debugging interface, a first wireless module, an operating state indicator lamp, a switch and a first charging interface, wherein the direct current stabilized power supply, the data acquisition chip, the microprocessor, the debugging interface, the first wireless module, the operating state indicator lamp, the switch and the first charging interface are all connected with the first circuit board; the power supply battery is used for supplying power to all electric appliances of the temperature correction device; the direct current stabilized power supply is used for providing a direct current power supply for the wireless temperature measuring device through the power supply battery; the data acquisition chip is used for converting analog signals generated by the temperature measurement sensor along with different temperatures into digital signals; the microprocessor is used for calculating to obtain a real temperature value of the centrifugal component to be measured according to a pre-stored voltage-resistance-temperature relation and a digital signal sent by the temperature data acquisition chip; the microprocessor is also used for controlling the on or off of the running state indicator lamp according to the electric quantity of the power supply battery; the debugging interface is used for providing an interface for online debugging of data inside the microprocessor and program downloading; the first wireless module is used for wirelessly transmitting the real temperature value of the centrifugal component to be measured to the wireless receiving device; the switch is used for controlling the power supply battery to be switched on or switched off; the first charging interface is used for being connected with the wireless receiving device and charging the power supply battery.
Preferably, the microprocessor stores the temperature calibration curve by a three-point calibration method or a two-point calibration method, and calculates the real temperature value of the centrifugal component to be measured according to the temperature calibration curve and the theoretical temperature value.
Preferably, the wireless receiving device comprises a housing, a second circuit board, a power module, a second wireless module, a bus conversion module, a peripheral interface and a second charging interface, wherein the power module, the second wireless module, the bus conversion module, the peripheral interface and the second charging interface are all connected with the second circuit board, and the second circuit board is arranged in the housing; the power module is respectively connected with the peripheral interface and a second charging interface, the second charging interface is connected with the first charging interface, and the power module is used for converting a power supply input by the peripheral interface into a power supply for charging the power supply battery; the second wireless module is used for wirelessly receiving the real temperature value of the centrifugal component to be measured; the bus conversion module is used for converting the real temperature value of the centrifugal component to be detected into a bus interface protocol compatible with the computer terminal and sending the bus interface protocol to the computer terminal.
Preferably, the first wireless module or the second wireless module adopts a bluetooth chip, a radio frequency identification module, a ZigBee module or an nRF24L01P module.
Preferably, when the temperature measuring sensor and the temperature correcting device are arranged on the centrifugal main part on the same side of the centrifugal assembly to be measured, the mass balancer is in a structure with the same mass center position and mass as the combined mass center position and mass of the temperature correcting device, the temperature measuring sensor and the centrifugal assembly to be measured, and is used for measuring the temperature of the centrifugal assembly to be measured on the same side; when the temperature measurement sensor and the temperature correction device are arranged on the centrifugal main part on the opposite side of the centrifugal assembly to be measured, the mass balancer is a mechanism which combines the mass balancer, the temperature correction device and the temperature measurement sensor and has the same mass center position and mass as those of the centrifugal assembly to be measured, and is used for measuring the temperature of the opposite side of the centrifugal assembly to be measured.
Preferably, the centrifugal main part adopts a chip tray, the centrifugal component to be measured adopts a microfluidic chip with a fan-shaped structure, the mass balancing of the mass balancer adopts an opposite-side temperature measurement mode, the mass balancer comprises a supporting plate, the supporting plate adopts a fan-shaped structure, a plurality of positioning comb teeth are arranged on the arc surface of the supporting plate, and a groove for placing the temperature correction device is formed in the supporting plate; the temperature correction device comprises a positioning comb tooth, a groove and a support plate, wherein the positioning comb tooth is positioned between the positioning comb tooth and the groove and corresponds to the same structure on the centrifugal component to be detected; the temperature correction device is provided with a plurality of magnet mounting holes, and the groove is correspondingly provided with a plurality of magnet mounting positions; and the groove is also provided with a plurality of stop bar holes for placing stop bars on the centrifugal main part.
Preferably, the temperature measuring sensor is a contact temperature sensor and is directly arranged in the area to be measured of the temperature of the centrifugal main part.
Preferably, the power supply battery adopts a miniature button battery, a small-package lithium battery or a small-package electrochemical capacitor.
Preferably, the power module adopts an intelligent charging management system chip, a constant current charging management chip or a constant voltage conversion chip.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. the invention is provided with the mass balancer to balance the wireless temperature measuring device with the centrifugal component to be measured, so that the wireless temperature measuring device can carry out temperature in-situ contact type measurement along with the movement of the centrifugal component to be measured, is not influenced by high-speed rotation movement, wirelessly transmits data to the computer terminal in real time through the wireless receiving device, gives consideration to the balancing use requirement of the centrifugal component to be measured and the theoretical temperature conversion and calibration requirements of the temperature measuring sensor in use, and has accurate, stable and reliable data. 2. According to the invention, the wireless temperature measuring device is directly placed in the temperature to-be-measured area of the centrifugal main part, so that the temperature measurement accuracy can be improved. 3. The invention transmits the temperature measurement value to the computer terminal in real time by using a wireless communication mode, can improve the feedback speed of temperature measurement, and can be widely applied to the field of temperature measurement of centrifugal equipment.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a block diagram schematically showing the structure of a temperature correction device according to the present invention;
FIG. 3 is a schematic diagram of the trimming of the wireless temperature measuring device and the centrifugal assembly to be measured according to the present invention;
FIG. 4 is a top view of the mass balancer of the invention;
FIG. 5 is a side cross-sectional view of the mass balancer of FIG. 4;
FIG. 6 is a block diagram schematically illustrating the structure of a wireless receiving apparatus according to the present invention;
FIG. 7 is a flow chart of the calibration of the wireless temperature measurement device of the present invention;
FIG. 8 is a flow chart of a method of use of the present invention.
Detailed Description
The present invention is described in detail below with reference to the attached drawings. It is to be understood, however, that the drawings are provided solely for the purposes of promoting an understanding of the invention and that they are not to be construed as limiting the invention. In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in FIG. 1, the wireless device for real-time measurement of the in-situ temperature of the high-speed centrifugal apparatus provided by the invention comprises a wireless temperature measuring device 1 and a wireless receiving device 2, wherein the wireless temperature measuring device 1 comprises a mass balancer 10, a temperature measuring sensor 11 and a temperature correcting device 12.
The quality balancer 10 is arranged on one side of the centrifugal main part, the centrifugal assembly to be tested is arranged on the other side of the centrifugal main part, and the quality balancer 10 is used for carrying out quality balancing on the wireless temperature measuring device 1 and the centrifugal assembly to be tested, so that the wireless temperature measuring device 1 can be placed in the centrifugal main part to carry out high-speed centrifugal motion. Temperature sensor 11 and temperature correcting unit 12 all set up on the centrifugation main part of the centrifugal subassembly homonymy that awaits measuring or offside, and temperature sensor 11 is connected to temperature correcting unit 12 relevant position through cutting straightly pin or pin connection, and temperature correcting unit 12 wireless connection wireless receiving device 2, temperature sensor 11 are used for measuring the temperature value of the centrifugal subassembly that awaits measuring in real time, and temperature correcting unit 12 is used for calibrating the temperature value of the centrifugal subassembly that awaits measuring and obtains the true temperature value of the centrifugal subassembly that awaits measuring. The wireless receiving device 2 is used for wirelessly receiving the real temperature value of the centrifugal component to be measured and transmitting the real temperature value to the computer terminal 3.
In a preferred embodiment, as shown in fig. 2, the temperature calibration device includes a first circuit board 120, a micro power supply battery 121, a dc regulated power supply 122, a data acquisition chip 123, a microprocessor 124, a first wireless module 125, a debug interface 126, an operation status indicator light 127, a switch 128, a first charging interface 129, a standard protocol interface, and a part of resistive, capacitive, and inductive elements. The components except the micro power supply battery 121 are all connected to the first circuit board 120 by a small-package patch-type device through surface patch welding. The micro power supply battery 121 is used to supply power to various electrical devices of the temperature correction device 12. The dc regulated power supply 122 is configured to adjust the output voltage of the micro power supply battery 121 to a voltage value suitable for the wireless temperature measuring device 1, and provide a reliable power supply with stable voltage and small power ripple. The data acquisition chip 123 is used for converting the difference of analog signals such as voltage and current generated by the temperature sensor 11 along with the temperature difference into a digital voltage value which can be processed by the microprocessor 124. The microprocessor 124 is configured to read a voltage value of the temperature data acquisition chip 123, calculate a theoretical temperature value according to a pre-stored voltage-resistance-temperature relationship, store a temperature calibration curve by using a three-point calibration method or a two-point calibration method, calculate a true temperature value of the centrifugal component to be measured according to the temperature calibration curve and the theoretical temperature value, send the true temperature value to the first wireless module 125 through the standard protocol interface, and backup data; the microprocessor 124 is also used for controlling the on or off of the running state indicator light 127 according to the power of the micro power supply battery 121. The first wireless module 125 is used for transmitting the real temperature value sent by the microprocessor 124 to the wireless receiving device 2 in a wireless manner through a standard wireless communication protocol. The debug interface 126 is used to provide an interface for online debugging of data and program download inside the microprocessor 124. The operation status indicator light 127 is used for indicating the electric quantity status of the wireless temperature measuring device 1. The switch 128 is used to control the on or off of the micro power supply battery 121. The first charging interface 129 is used for connecting the wireless receiving device 2 and charging the micro power supply battery 121.
In a preferred embodiment, when the temperature measuring sensor 11 and the temperature correcting device 12 are disposed on the centrifugal main part on the same side of the centrifugal component to be measured, the centrifugal component to be measured is fixedly or detachably disposed on the centrifugal main part, the mass balancer 10 has a structure with the same mass center position and mass as the combined mass center position of the temperature correcting device 12, the temperature measuring sensor 11 and the centrifugal component to be measured, and is used for measuring the temperature of the centrifugal component to be measured on the same side, at this time, the temperature correcting device 12 is fixedly disposed on the centrifugal main part on the same side of the centrifugal component to be measured, the temperature measuring sensor 11 is disposed at the temperature measuring area of the centrifugal main part on the same side of the centrifugal component to be measured, and the mass balancer 10 is disposed on the opposite side of the.
In a preferred embodiment, when the temperature measuring sensor 11 and the temperature correcting device 12 are arranged on the centrifugal main part on the opposite side of the centrifugal assembly to be measured, the centrifugal assembly to be measured is fixedly or detachably arranged on the centrifugal main part, and the mass balancer 10 is a mechanism which is combined with the temperature correcting device 12 and the temperature measuring sensor 11 and has the same mass center position and mass as those of the centrifugal assembly to be measured, and is used for measuring the temperature on the opposite side of the centrifugal assembly to be measured. Because the centrifugal subassembly that awaits measuring continues to rotate along with the centrifugation master, in same rotational position department, the temperature of the centrifugal subassembly surface that awaits measuring is the same with the temperature of the corresponding centrifugation master contralateral, consequently, the contralateral temperature measurement sets up quality balancing ware 10 to the structure similar with the centrifugal subassembly size that awaits measuring, and reserve the space and the quality of temperature measurement sensor 11, temperature correcting unit 12, make weight and size after temperature measurement sensor 11, temperature correcting unit 12 and quality balancing ware 10 make up the same with the centrifugal subassembly, and set up after combining them on the centrifugation master of the centrifugal subassembly offside that awaits measuring.
In a preferred embodiment, as shown in fig. 3 to 5, the centrifugal main part adopts a circular chip tray 4, the centrifugal component to be tested adopts a microfluidic chip 5 with a fan-shaped structure, and the mass balancing of the mass balancer 10 adopts an opposite-side temperature measurement mode. The mass balancer 10 is of a fan-shaped structure and comprises a support plate 100, positioning comb teeth 101, grooves 102, a detection chamber 103, a reaction hole 104, positioning holes 105, a magnet mounting position 106, magnets and a baffle hole 107. The supporting plate 100 is of a fan-shaped structure, the arc-shaped surface of the supporting plate 100 is provided with a plurality of positioning comb teeth 101, and the supporting plate 100 is provided with a groove 102 for placing the temperature correction device 12. The positioning comb teeth 101 and the grooves 102 are arranged between the supporting plate 100, a plurality of detection chambers 103 and reaction holes 104 are arranged on the supporting plate at intervals corresponding to the same structure on the microfluidic chip 5, the detection chambers 103 are used for inserting and fixing the temperature measuring sensors 11, and the reaction holes 104 are used for detecting the reaction process in the microfluidic chip 5. The temperature correction device 12 and the groove 102 are provided with a plurality of positioning holes 105. The temperature calibration device 12 is provided with a plurality of magnet mounting holes, and the groove 102 is correspondingly provided with a plurality of magnet mounting positions 106. The groove 102 is further provided with a plurality of stop bar holes 107, and the stop bar holes 107 are used for placing stop bars on the centrifugal main part. When the temperature-measuring device is used, the positioning hole 105 of the temperature correction device 12 is overlapped with the positioning hole 105 of the mass balancer 10, the two are fixed through silica gel or a positioning column, the temperature-measuring sensor 11 is inserted into the detection chamber 103, and the heat-conducting silica gel is used for filling. Magnets are arranged at the magnet mounting positions 106 and the magnet mounting holes, and the magnets attract magnets on the centrifugal main part to limit the wireless temperature measuring device 1 to the centrifugal main part with the same height as the microfluidic chip 5. The stop on the eccentric main part is inserted into the stop hole 107 of the mass balancer 10. Thereby, the mass distribution, the mass center and the total mass of the wireless thermometric device 1 and the microfluidic chip 5 can be ensured to be consistent to the greatest extent possible.
In a preferred embodiment, as shown in fig. 6, the wireless receiving device includes a housing, a second circuit board 20, a power module 21, a peripheral interface 22, a second charging interface 23, a charging indicator 24, a second wireless module 25, a bus conversion module 26, and a part of elements such as a resistor, a capacitor, and an inductor, where the above elements are all connected to the second circuit board 20 by a small package patch device through surface patch welding, the second circuit board 20 is disposed in the housing, and the second circuit board 20 is fixedly connected to the housing through a screw. The power module 21 is connected with the peripheral interface 22 and the second charging interface 23 respectively, the second charging interface 23 is connected with the first charging interface 129, the power module 21 is used for converting a power supply input by the peripheral interface 22 into a power supply for charging the micro power supply battery 121, and the power supply is supplied to the micro power supply battery 121 through the second charging interface 23 and the first charging interface 129. The charge indicator lamp 24 is used in cooperation with the power module 21 to indicate the charge state of the micro power supply battery 121. The second wireless module 25 is configured to wirelessly receive the temperature value of the centrifugal component to be tested, which is sent by the first wireless module 125. The bus conversion module 26 is configured to convert the actual temperature value of the centrifugal component to be measured into a bus interface protocol compatible with the computer terminal 3, and send the bus interface protocol to the computer terminal 3.
In a preferred embodiment, the temperature measuring sensor 11 may be a contact temperature sensor and is directly disposed in the temperature measurement area of the centrifugal main part, wherein the contact temperature sensor includes K, E, J, N, B, S, R or T thermocouple and Pt100, Pt10, Cu50 or Cu100 thermistor, for example, Pt100 platinum thermistor.
In a preferred embodiment, the micro power supply battery 121 may be a micro button cell battery, a small packaged lithium battery or a small packaged electrochemical capacitor, such as a lithium polymer battery with a dc voltage of 3.7V and a power of 100 mAh.
In a preferred embodiment, the dc voltage-stabilized power supply 122 may employ a conventional linear voltage-dropping power supply chip, a low-loss low-voltage-drop switch-type power supply chip, or a controllable precision voltage-stabilizing power supply, for example, a compact, low equivalent series resistance linear voltage-dropping XC6106P332MR chip may be employed.
In a preferred embodiment, the data acquisition chip 123 may employ an analog-to-digital converter (ADC) or an integrated sensor acquisition chip, such as an ADS1248 chip.
In a preferred embodiment, the microprocessor 124 may be a 51 series single chip microcomputer, an AVR series single chip microcomputer or an ARM Cortex-M series single chip microcomputer, for example, an ARM Cortex-M series STM32F103CBT6 chip may be used.
In a preferred embodiment, the first wireless module 125 and the second wireless module 25 may each adopt a bluetooth chip, a Radio Frequency Identification (RFID) module, a ZigBee (ZigBee protocol) module, an nRF24L01P module, or the like, according to the size of the entire centrifugal device, the wireless transmission distance, and/or the data quality; for example, a bluetooth USR-BLE101 chip may be used, and the wireless temperature measuring device is connected with the wireless receiving device through a bluetooth wireless communication protocol.
In a preferred embodiment, the interface protocol between the debug interface 126 and the microprocessor 124 may adopt JTAG (Joint Test Action Group) and SWD (Standing-wave detector) modes for an ARM chip, ISP (Internet Service Provider) modes for an AVR chip, or serial port and ISP modes for a 51-chip microcomputer, for example, an SWD micro add-drop interface for an ARM chip.
In a preferred embodiment, the operation status indicator light 127 may employ a single color, two color or multi-color indicator light of a power-up-pull type or a power-down-pull type, for example, a single color indicator light of a power-down type, depending on the driving manner or the amount of indication status information.
In a preferred embodiment, the switch 128 may be a toggle switch 128 or a point-contact self-locking patch switch 128. The switch 128 can control whether the wireless temperature measuring device 1 is powered or not, the micro power supply battery 121 provides power after the switch 128 is closed, and meanwhile, the wireless temperature measuring device 1 enters the running state.
In a preferred embodiment, the first charging interface 129 and the second charging interface 23 may respectively adopt a micro direct plug interface or a flexible flat cable.
In a preferred embodiment, the power module 21 may employ a smart charge management system chip, a constant current charge management chip, or a constant voltage conversion chip, for example, the smart charge management system chip SLM6150 may be employed.
In a preferred embodiment, the bus interface protocol converted by the bus conversion module 26 may be a USB interface, a serial interface, a PCI interface, or a PCI-E interface, and for example, a USB interface FT232 chip may be used.
In a preferred embodiment, due to the differences in the physical characteristics of the thermometric sensors 11 themselves, the wireless thermometric device 1 requires a temperature calibration before use, wherein: 1) three-point calibration method, assuming that the temperature values acquired by the temperature sensor 11 three times are x respectively1、x2、x3The temperature values measured by the standard meter during the three calibration of the microprocessor 124 are y1、y2、y3Substituting them into the quadratic equation axi 2+bxi+c＝yiAnd solving to obtain specific numerical values of the unknown quantities a, b and c, thus completing calibration. The real temperature value measured by the standard instrument is acquired by the temperature sensor 11 after the calibration for three timesiFrom yi＝axi 2+bxiAnd + c, the calibration method is suitable for the temperature measurement sensor 11 with the signal-temperature satisfying the quadratic polynomial relation, such as the thermocouple and the like. 2) Two-point calibration method, assuming that the temperature values acquired by the temperature sensor 11 twice are x respectively1、x2The real temperature values measured by the standard meter during the second calibration of the corresponding microprocessor 124 are y1、y2Substituting them into a linear equation axi+b＝yiAnd solving to obtain specific numerical values of the unknown quantities a and b, namely completing calibration. The real temperature value measured by the standard instrument during the secondary calibration is the temperature value x collected by the temperature sensor 11iFrom yi＝axi+ b, the calibration method is applied to the temperature measurement sensor 11 in which the signal-temperature relationship satisfies a linear relationship, such as Pt100, Pt10, Cu50, and Cu100 thermistors.
In a preferred embodiment, a data receiving module, a display module and a data storage module are arranged in the computer terminal 3. The data receiving module is used for receiving the temperature value sent by the second wireless module 25 through the bus conversion module 26, and displaying the temperature value through the display module. The data storage module is used for storing the received temperature value.
As shown in fig. 7, the following describes the calibration method of the wireless temperature measuring device 1 in the present invention in detail by taking the temperature calibration range of 30 ° to 40 °:
1) the wireless receiving device 2 is connected with the computer terminal 3, and information such as the port number and the baud rate of the computer terminal 3 is set.
2) And opening the wireless temperature measuring device 1, and carrying out wireless communication pairing on the wireless temperature measuring device 1 and the wireless receiving device 2.
3) The wireless temperature measuring device 1 collects the temperature value of the environment where the wireless temperature measuring device is located in real time, transmits the temperature value to the wireless receiving device 2 through the temperature correcting device 12, and displays the temperature value to the computer terminal 3.
4) A calibration method, such as a two-point calibration method, of the microprocessor 124 within the temperature correction device 12 is selected.
5) Respectively placing the wireless temperature measuring device 1 and a standard temperature measuring instrument in an environment with the temperature of about 30 ℃ for temperature measurement, and acquiring the temperature values of the wireless temperature measuring device 1 and the standard temperature measuring instrument when the temperature value measured by the wireless temperature measuring device 1 does not fluctuate any more, so as to finish the calibration of a first point; and respectively placing the wireless temperature measuring device 1 and the standard temperature measuring instrument in an environment of about 40 degrees for temperature measurement, and when the temperature value measured by the wireless temperature measuring device 1 does not fluctuate any more, obtaining the temperature values of the wireless temperature measuring device 1 and the standard temperature measuring instrument at the moment, and completing the calibration of the second point. If a three-point calibration method is chosen, sequential temperature measurements can be made in an environment of about 35 ℃.
6) The microprocessor 124 of the temperature calibration device 12 calculates specific values of the unknown quantities a and b (or a \ b \ c), and writes the specific values into the memory of the microprocessor 124 to complete the calibration of the wireless temperature measuring device 1.
As shown in fig. 8, the method for using the wireless device for real-time in-situ temperature measurement of a high-speed centrifugal apparatus according to the present invention is described in detail below with the opposite-side temperature measurement of the centrifugal module to be measured as a specific embodiment:
1) the centrifugal assembly to be measured is arranged on one side of the centrifugal main part, the wireless temperature measuring device 1 is arranged on the reasonable horizontal position on the other side of the centrifugal main part through the positioning column and the blocking strip of the mass balancer 10, and the height of the wireless temperature measuring device 1 is fixed through the suction force of the magnet, so that the wireless temperature measuring device 1 cannot be separated from the centrifugal main part during centrifugation.
2) The wireless temperature measuring device 1 is started, if the running state indicator light 127 shows that the electric quantity is insufficient, the first charging interface 129 of the wireless temperature measuring device 1 is connected with the second charging interface 23 of the wireless receiving device 2, the wireless receiving device 2 is started, and the micro power supply battery 121 is charged.
3) If the running state indicator light 127 shows that the electric quantity is normal, the wireless receiving device 2 is connected with the computer terminal 3 through a bus protocol interface, and parameters such as a port number and a baud rate of a data receiving module are set;
4) the wireless temperature measuring device 1 and the wireless receiving device 2 are in wireless communication pairing, and the temperature value measured by the wireless temperature measuring device 1 is sent to the computer terminal 3 through the wireless receiving device 2.
5) The microprocessor 124 in the wireless temperature measuring device 1 calibrates the measured temperature value to obtain a real temperature value, and displays the real temperature value through the computer terminal 3.
6) And after the temperature measurement is finished, storing the data, closing the wireless temperature measuring device 1 and the wireless receiving device 2, and taking down the wireless temperature measuring device 1.
The above embodiments are only used for illustrating the present invention, and the structure, connection mode, manufacturing process, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.
Claims (9)
1. A wireless device for real-time measurement of in-situ temperature of high-speed centrifugal equipment is characterized by comprising a wireless temperature measuring device and a wireless receiving device, wherein the wireless temperature measuring device comprises a mass balancer, a temperature measuring sensor and a temperature correcting device;
the quality balancer is arranged on one side of the centrifugal main part, a centrifugal assembly to be tested is arranged on the other side of the centrifugal main part, and the quality balancer is used for carrying out quality balancing on the wireless temperature measuring device and the centrifugal assembly to be tested, so that the wireless temperature measuring device can be placed in the centrifugal main part to carry out centrifugal motion;
the temperature measurement sensor and the temperature correction device are both arranged on the centrifugal main part at the same side or the opposite side of the centrifugal component to be measured, the temperature measurement sensor is connected with the temperature correction device, the temperature measurement sensor is used for measuring the temperature value of the centrifugal component to be measured in real time, and the temperature correction device is used for calibrating the temperature value of the centrifugal component to be measured to obtain the real temperature value of the centrifugal component to be measured;
the temperature correction device is wirelessly connected with the wireless receiving device, and the wireless receiving device is used for wirelessly receiving the real temperature value of the centrifugal component to be measured and transmitting the real temperature value to the computer terminal;
the temperature correction device comprises a first circuit board, a power supply battery, a direct current stabilized power supply, a data acquisition chip, a microprocessor, a debugging interface, a first wireless module, an operating state indicator lamp, a switch and a first charging interface, wherein the direct current stabilized power supply, the data acquisition chip, the microprocessor, the debugging interface, the first wireless module, the operating state indicator lamp, the switch and the first charging interface are all connected with the first circuit board;
the power supply battery is used for supplying power to all electric appliances of the temperature correction device;
the direct current stabilized power supply is used for providing a direct current power supply for the wireless temperature measuring device through the power supply battery;
the data acquisition chip is used for converting analog signals generated by the temperature measurement sensor along with different temperatures into digital signals;
the microprocessor is used for calculating to obtain a real temperature value of the centrifugal component to be measured according to a pre-stored voltage-resistance-temperature relation and a digital signal sent by the temperature data acquisition chip;
the microprocessor is also used for controlling the on or off of the running state indicator lamp according to the electric quantity of the power supply battery;
the debugging interface is used for providing an interface for online debugging of data inside the microprocessor and program downloading;
the first wireless module is used for wirelessly transmitting the real temperature value of the centrifugal component to be measured to the wireless receiving device;
the switch is used for controlling the power supply battery to be switched on or switched off;
the first charging interface is used for being connected with the wireless receiving device and charging the power supply battery.
2. The wireless device as claimed in claim 1, wherein the microprocessor stores a temperature calibration curve by a three-point calibration method or a two-point calibration method, and calculates a real temperature value of the centrifugal assembly to be measured according to the temperature calibration curve and a theoretical temperature value.
3. The wireless device for the in-situ temperature real-time measurement of the high-speed centrifugal equipment as claimed in claim 1, wherein the wireless receiving device comprises a housing, a second circuit board, a power module, a second wireless module, a bus conversion module, a peripheral interface and a second charging interface, wherein the power module, the second wireless module, the bus conversion module, the peripheral interface and the second charging interface are all connected with the second circuit board, and the second circuit board is arranged in the housing;
the power module is respectively connected with the peripheral interface and a second charging interface, the second charging interface is connected with the first charging interface, and the power module is used for converting a power supply input by the peripheral interface into a power supply for charging the power supply battery;
the second wireless module is used for wirelessly receiving the real temperature value of the centrifugal component to be measured;
the bus conversion module is used for converting the real temperature value of the centrifugal component to be detected into a bus interface protocol compatible with the computer terminal and sending the bus interface protocol to the computer terminal.
4. The wireless device for in-situ temperature real-time measurement of the high-speed centrifugal equipment as claimed in claim 3, wherein the first wireless module or the second wireless module adopts a Bluetooth chip, a radio frequency identification module, a ZigBee module or an nRF24L01P module.
5. The wireless device for in-situ real-time temperature measurement of high-speed centrifugal equipment as claimed in claim 1, wherein when the temperature measuring sensor and the temperature correcting device are disposed on the centrifugal main component on the same side of the centrifugal component to be measured, the mass balancer has a structure with the same mass center position and mass as those of the temperature correcting device, the temperature measuring sensor and the centrifugal component to be measured after combination, and is used for measuring the temperature on the same side of the centrifugal component to be measured;
when the temperature measurement sensor and the temperature correction device are arranged on the centrifugal main part on the opposite side of the centrifugal assembly to be measured, the mass balancer is a mechanism which combines the mass balancer, the temperature correction device and the temperature measurement sensor and has the same mass center position and mass as those of the centrifugal assembly to be measured, and is used for measuring the temperature of the opposite side of the centrifugal assembly to be measured.
6. The wireless device for in-situ temperature real-time measurement of high-speed centrifugal equipment according to claim 5, wherein the centrifugal main part adopts a chip tray, the centrifugal component to be measured adopts a microfluidic chip with a fan-shaped structure, the mass balancing of the mass balancer adopts an opposite-side temperature measurement mode, the mass balancer comprises a support plate, the support plate adopts a fan-shaped structure, a plurality of positioning comb teeth are arranged on the arc surface of the support plate, and a groove for placing the temperature correction device is arranged on the support plate;
the temperature correction device comprises a positioning comb tooth, a groove and a support plate, wherein the positioning comb tooth is positioned between the positioning comb tooth and the groove and corresponds to the same structure on the centrifugal component to be detected;
the temperature correction device is provided with a plurality of magnet mounting holes, and the groove is correspondingly provided with a plurality of magnet mounting positions; and the groove is also provided with a plurality of stop bar holes for placing stop bars on the centrifugal main part.
7. The wireless device for in-situ real-time temperature measurement of the high-speed centrifugal equipment as claimed in claim 1, wherein the temperature measuring sensor is a contact temperature sensor and is directly arranged in the temperature measurement area of the centrifugal main part.
8. The wireless device for in-situ real-time temperature measurement of high-speed centrifugal apparatuses according to claim 1, wherein the power supply battery is a miniature button battery, a small-package lithium battery or a small-package electrochemical capacitor.
9. The wireless device for in-situ temperature real-time measurement of high-speed centrifugal apparatuses according to claim 3, wherein the power module employs an intelligent charging management system chip, a constant current charging management chip or a constant voltage conversion chip.
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| CN101936785A (en) * | 2010-08-30 | 2011-01-05 | 中国人民解放军海军工程大学 | Wireless temperature-measuring system of motor rotor |
| CN105115618A (en) * | 2015-09-18 | 2015-12-02 | 西交利物浦大学 | Wireless temperature sensor apparatus for vacuum temperature measurement |
| CN205436048U (en) * | 2015-12-30 | 2016-08-10 | 中国石油天然气股份有限公司 | Monitoring system for centrifuge |
| JP2018108546A (en) * | 2016-12-28 | 2018-07-12 | 日立工機株式会社 | Centrifugal machine |
| CN107014523A (en) * | 2017-05-18 | 2017-08-04 | 周孝银 | A kind of temperature measurement system with self-correcting function |
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