A self-powered temperature-measuring intelligent tool handle based on electromagnetic induction

Abstract

The present invention relates to the field of mechanical processing and manufacturing, and specifically to an intelligent tool handle that realizes online monitoring of temperature during cutting processing through electromagnetic induction self-power supply. The present invention adopts electromagnetic induction self-power supply to make it possible for the intelligent tool handle to be used continuously for a long time, thereby improving the convenience of use; the present invention discloses a method for measuring the tip temperature of a milling cutter with a blade by pasting a thermocouple, which can obtain the actual working temperature of the blade during the cutting process, which helps to optimize the cutting parameters, improve the cutting efficiency and the life of the tool; the present invention can timely detect and deal with the problem of tool overheating through the tip temperature measurement, thereby reducing potential safety risks; the present invention can make timely adjustments and optimizations according to the cutting conditions and tool status, thereby improving production efficiency; the intelligent tool handle of the present invention has great potential to integrate more sensors to obtain more processing parameters, and has broad application prospects in related fields such as cutting processing, tool design and process optimization.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing and manufacturing, and in particular to an intelligent tool handle which can realize online monitoring of temperature in a cutting process through electromagnetic induction self-power supply technology. Background Art

[0002] In the cutting process, due to the lack of real-time monitoring of the temperature parameters between the tool and the workpiece, it is often difficult to accurately control the machining process. In order to solve these problems, a type of temperature measuring tool holder that can realize online monitoring of the machining process has gradually emerged. The temperature information of this type of tool holder is used to determine whether the machining process is normal, adjust the tool processing parameters in real time, evaluate and predict the tool status, and optimize and improve the machining process. It plays a key role in achieving efficient, accurate and reliable machining operations. However, due to the high price of the product, it is often used in experimental research, not in the actual product processing process. Researchers usually use artificial thermocouples based on the Seebeck effect to integrate the tool through the thermocouple processing circuit on the tool holder to realize the temperature measuring tool holder. However, the signal processing circuit has low integration and large volume, so the tool holder is bulky and easy to cause interference during the machining process. In addition, most tool holders rely on battery power, which limits long-term continuous monitoring during the machining process. In addition, the tool with integrated thermocouples in the temperature measuring tool holder system is not reusable, so it has always been a difficult problem to monitor the cutting temperature in real time during the cutting process, which brings inconvenience to the cutting process. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an intelligent tool holder which is based on electromagnetic induction self-power supply technology and can realize online monitoring of the tip temperature of the blade on the milling cutter rod during cutting processing.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] It includes a tool handle body arranged on the main shaft, a magnet bracket, a magnet, a copper coil, a tapered handle circular ring hole, a rectifier and voltage-stabilizing circuit, a milling cutter rod, a blade mounting screw, a blade, a thermocouple, and a thermocouple detection circuit; the magnet bracket is provided with a wedge-shaped groove, and the magnet is connected to the magnet bracket through the wedge-shaped groove; the magnet bracket is arranged on the side of the interface between the main shaft and the tool handle body, and the magnet bracket is arranged on the main shaft end surface mounting cover through the bracket fastening screw; the copper coil is arranged in the tapered handle circular ring hole; the blade and the milling cutter rod are threadedly connected through the blade mounting screw; the thermocouple is arranged on the milling cutter rod, and the thermocouple measuring end is arranged on the blade; the rectifier and voltage-stabilizing circuit and the thermocouple detection circuit are both arranged on the tool handle body.

[0006] It also includes a bridge signal processing board, a power management board, a main control board, a WiFi board, a collet, a nut and a milling cutter; four circuit board mounting platforms are arranged in the middle of the handle body, and the circuit board mounting platform is provided with an upper row of fastening threaded through holes and a lower row of fastening threaded blind holes; the signal processing board, the power management board, the main control board and the WiFi board are arranged on the four circuit board mounting platforms through an upper row of fastening screws and a lower row of fastening screws, respectively, and the upper row of fastening screws and the lower row of fastening screws are matched with the upper row of fastening threaded through holes and the lower row of fastening threaded blind holes, respectively; a coil lead hole is arranged on the circular ring hole of the cone handle, a circuit board lead groove is arranged between the adjacent circuit board mounting platforms, and a circuit board lead hole is arranged on the circuit board mounting platform matched with the power management board; the induced current in the copper coil is transmitted to the power management board, the bridge signal processing board, the main control board and the WiFi board through the coil lead hole, the circuit board lead hole and the circuit board lead groove; the collet, the nut and the milling cutter are arranged at the lower end of the handle body in sequence, and the rectifier and voltage stabilizing circuit is arranged on the power management board.

[0007] The rectifier and voltage stabilizing circuit includes 6 circuit board lead interfaces P15, capacitors C94-C97, C99-C100, C103-C105, resistors R116-R123, temperature measuring resistor RT1, LED lamp D6 and wireless power receiver U13; the circuit board lead interface P15 includes 6 interfaces; the wireless power receiver U13 includes interfaces CLAMP1, COMM1, AC1, AC2, BOOT1, BOOT2, CLAMP2, COMM2, OUT, CHG, ILIM, FOD, RECT, TS, EN1, EN2; one end of the capacitor C96 is connected in parallel with the capacitors C99 and C103 and connected to the AC1 interface of U13, and the other end of C96 is connected to the BOOT1 of U13; the other end of the capacitor C99 is connected to the interface CLAMP1 of U13; the other end of the capacitor C103 is connected to the interface COMM1 of U13; one end of the capacitor C97 is connected in parallel with the capacitors C100 and C104 and connected to the AC2 interface of U13, and the other end of C97 is connected to the BOOT2 of U13; the other end of the capacitor C100 is connected to the interface CLAMP2 of U13; The other end of capacitor C104 is connected to the interface COMM2 of U13; the positive pole of the LED lamp D6 is connected to the interface OUT of U13, and the negative pole is connected to the interface CHG of U13; one end of the resistor R116 is connected to the interface ILIM of U13, and the other end is connected to the resistors R117 and R121, and the interface FOD of U13; one end of the resistor R117 is connected to the interface FOD of U13, and the other end is connected to the interface RECT of U13 and the filter capacitor C105; one end of the resistor R121 is connected to the interface FOD of U13, and the other end is connected to GND; one end of the capacitor C105 is connected to RECT of U13, and the other end is connected to GND; one end of the resistor R119 is connected to VOUT, and the other end is connected to resistor R122 and interface 5 of P15, and the other end of resistor R122 is connected to GND; one end of the resistor R120 is connected to VOUT, and the other end is connected to resistor R123 and interface 6 of P15, and the other end of resistor R123 is connected to GND; the temperature measuring resistor RT1 is connected to interface TS of U13; interfaces 1 and 2 of P15 are connected to GND, interfaces 3 and 4 are connected to voltage source VOUT, interface 5 is connected to interface EN1 of U13, and interface 6 is connected to interface EN2 of U13.

[0008] It also includes a shank body groove and a lead wire square hole; the milling cutter shank is connected to the shank body through a collet and a nut; the milling cutter shank is provided with shank body grooves along the blade installation side; the thermocouple is adhered to the tip of the blade cutting edge through a heat-resistant tape; the thermocouple is connected to the main control board on the surface of the shank through the shank body groove and the lead wire square hole.

[0009] The thermocouple detection circuit includes an analog conversion chip U6, transistors TVS1~TVS4, resistors R26~R43, and capacitors C22~C31; the analog conversion chip U6 includes 16 interfaces; it is assumed that THC_1P, THC_1N, THC_2P and THC_2N are thermocouple temperature signals from the vibration plate; taking the THC_1P connection as an example, one end of the TVS1 tube is connected to AGND, and the other end is connected to resistors R26 and R27; the other end of the resistor R26 is connected to AVDD, and the other end of the resistor R27 is connected to resistor R28 and capacitor C22; The other end of resistor R28 is connected to interface 6 (AIN3) of U6, and the other end of capacitor C22 is connected to power supply AVDD; THC_1N, THC_2P, THC_2N are connected in the same way as THC_1P; it is assumed that THC_1P, THC_1N, THC_2P and THC_2N are THC0P, THC0N, THC1P and THC1N after filtering circuit, which are respectively connected to interfaces 6 (AIN3), 7 (AIN2), 11 (AIN0) and 10 (AIN1) of U6; interface 1 (SCLK) of U6 is connected to PB3 of main control board U2;

[0010] Interface 2 (port CS) of U6 is connected to interface PA15 of the main control board U2; interface 14 (DRDY) of U6 is connected in series with resistor R35, and then connected to PB6 of the main control board U2; interface 15 (DOUT) of U6 is connected in series with resistor R33, and then connected to PB4 of the main control board U2; interface 16 (DIN) of U6 is connected in series with resistor R32, and then connected to PB5 of the main control board U2; power supplies AVDD and DVDD are connected in parallel with capacitors C29 and C30 and then connected to grounds ADND and DGND.

[0011] The tapered handle annular holes are arranged on the tapered handle of the handle body. The number of the tapered handle annular holes is 3 or more and they are evenly arranged along the circumference of the tapered handle.

[0012] The magnet has a longitudinal section in the shape of an arc.

[0013] The size of the groove on the handle of the knife bar is 1mm×3mm.

[0014] The measuring end of the thermocouple is pasted at a position 5 mm from the front cutting edge and 3 mm from the rear cutting edge.

[0015] The positive effects of the present invention are as follows: the present invention proposes an implementation method of electromagnetic induction self-powering of an intelligent tool handle, so that the tool handle no longer needs an external power supply or battery to power the circuit. The solution of embedding the copper coil inside the tapered handle reduces the expansion of the external size of the tool handle, improves the integration of the tool handle, and reduces the possibility of processing interference of the intelligent tool handle; self-powering makes it possible to use the intelligent tool handle continuously for a long time, improving the convenience of use; reducing energy consumption, in line with the development trend of energy conservation and environmental protection; the present invention discloses a method for measuring the tip temperature of a milling cutter with a blade by pasting a thermocouple, which can obtain the actual working temperature of the blade during the cutting process, which is helpful to optimize the cutting parameters, improve the cutting efficiency and the tool Tool life; The present invention can understand the thermal deformation of the tool in the cutting process in real time by measuring the tool tip temperature, thereby reducing processing errors; The present invention can timely detect and deal with the problem of tool overheating, reducing potential safety risks; The present invention can make timely adjustments and optimizations according to the cutting conditions and tool status, thereby improving production efficiency and processing speed; The present invention is different from the method of integrating thermocouples on the end mill, and the method of integrating thermocouples on the blade of the insert milling cutter has higher tool utilization efficiency and is more in line with actual needs; The present invention discloses a highly integrated intelligent tool handle temperature signal processing modular circuit, which integrates multiple modules into a small printed circuit board, reduces the volume and weight of the intelligent tool handle system, and improves the system The present invention helps to simplify the tool handle structure and improve the work efficiency and performance of the system; the modular circuit of the present invention can process temperature signals and transmit them wirelessly at the same time, so as to obtain more information about the cutting process and tool status, and provide a more accurate data basis for tool use and cutting parameter optimization; the design of the modular circuit of the present invention provides convenience for integrating more signals into the intelligent tool handle, and reduces the workload for circuit maintenance and updating; the present invention is based on electromagnetic induction self-powered power with the ability to monitor temperature parameters in the cutting process online, and has a compact structure and high integration; the present invention breaks the shackles of limited use time caused by battery power supply of the intelligent tool handle; the present invention is a tool Condition monitoring, real-time control and adjustment during machining provide rich data support; the physical data-driven process optimization of the present invention helps to reduce production costs and improve competitiveness; the present invention helps to promote the development of intelligent and automated industrial production, and improve the production efficiency and product quality of the manufacturing industry; the rotor embedded in the tapered shank and the compact printed circuit board of the present invention greatly improve the integration of the intelligent tool handle, so that the external contour of the intelligent tool handle does not exceed the contour of the prototype tool handle, reducing the possibility of machining interference; the intelligent tool handle of the present invention has great potential to integrate more sensors to obtain more machining parameters, and has broad application prospects in related fields such as cutting machining, tool design and process optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 An exploded view of the overall structure of the intelligent knife handle of the present invention;

[0018] Figure 2 It is the assembly diagram of the knife handle of the present invention;

[0019] Figure 3 This is a main structural diagram of the knife handle of the present invention;

[0020] Figure 4 It is a schematic diagram of the electromagnetic induction structure of the present invention;

[0021] Figure 5 It is a schematic diagram of the temperature measuring knife rod structure of the present invention;

[0022] Figure 6 This is the circuit schematic diagram of the power management board;

[0023] Figure 7 This is the schematic diagram of the thermocouple detection circuit.

[0024] In the figure: 1 handle body, 101 upper row of fastening screws, 102 lower row of fastening screws, 103 tapered handle circular ring hole, 104 coil lead hole, 105 circuit board lead groove, 106 circuit board lead hole, 108 lead square hole, 109 circuit board mounting platform, 110 upper row of fastening threaded through holes, 111 lower row of fastening threaded blind holes, 2 collet, 3 nut, 4 milling cutter, 5 magnet bracket, 501 bracket fastening screw, 6 magnet, 7 copper coil, 11 bridge signal processing board, 12 power management board, 13 main control board, 1301 main control board square hole, 14 WiFi board, 15 spindle, 16 milling cutter arbor, 1601 arbor shank groove, 1602 blade mounting screw, 17 blade, 18 thermocouple. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Establish the intelligent tool handle device characterizing the present invention:

[0027] like Figure 1-4 As shown, the intelligent tool handle device is composed of a tool handle body 1, an upper row of fastening screws 101, a lower row of fastening screws 102, a collet 2, a nut 3, a milling cutter 4, a magnet bracket 5, a bracket fastening screw 501, a magnet 6, a copper coil 7, a bridge signal processing board 11, a power management board 12, a main control board 13, and a WiFi board 14. The prototype structure model of the tool handle body 1 is HSK63A-ER40-160L.

[0028] The handle body 1 has undergone a lot of structural changes on the basis of the prototype handle. A tapered handle circular ring hole 103 is provided for embedding the copper coil 7; a coil lead hole is provided in the tapered handle circular ring hole 103 for the copper coil 7 to be led to the center of the handle for collection; a circuit board lead groove 105 is provided for the transmission of energy and signals between the bridge signal processing board 11, the power management board 12, the main control board 13 and the WiFi board 14; a circuit board lead hole 106 is provided to connect the collected copper coil 7 leads to the power management board 12 for rectification and voltage stabilization; a circuit board mounting platform 109, an upper row of fastening threaded through holes 110 and a lower row of fastening threaded blind holes 111 are provided in combination with an upper row of fastening screws 101 and a lower row of fastening screws 102 to realize the installation of the bridge signal processing board 11, the power management board 12, the main control board 13 and the WiFi board 14 with the handle body 1; the milling cutter 4 is installed with the handle body 1 through a collet 2 and a nut 3. The tapered handle annular holes 103 are arranged on the tapered handle of the handle body 1, and the number of the tapered handle annular holes 103 is 3 or more and is evenly arranged along the circumference of the tapered handle. The magnet 6 has an arc-shaped longitudinal section.

[0029] Implementation method of the electromagnetic induction self-powered device of the present invention:

[0030] The intelligent tool handle self-powering device of the present invention is as follows Figure 3-4 As shown. This method is based on Faraday's law of electromagnetic induction. The specific implementation method is to use a magnet bracket 5 to carry a magnet 6 to generate a constant magnetic field near the lower end of the spindle 15. The magnet bracket 5 is connected to the spindle 15 through the screw hole on the spindle cover by screws 501. The magnet bracket 5 is manufactured by 3D printing of white resin material, and the magnet 6 is a customized NdFeB strong magnet with a circular arc shape in the longitudinal section. At the same time, a tapered handle annular hole 103 distributed at 120° is set on the handle body 1 for embedding three copper coils 7 placed at 120°. When the machine tool is cutting, the copper coil 7 rotates with the handle body 1. At this time, the magnetic flux in the copper coil 7 changes with the rotation, and the changing magnetic flux will generate an induced potential. The copper coil 7 passes through the coil lead hole 104 and then is collected through the circuit board lead hole 106 to the power management board 12. After rectification and voltage stabilization, it supplies power to various circuits and components; the circuit schematic diagram of the power management board 12 is shown in the attached Figure 6As shown, the rectifier and voltage stabilizing circuit includes 6 circuit board lead interfaces P15, capacitors C94-C97, C99-C100, C103-C105, resistors R116-R123, temperature measuring resistor RT1, LED lamp D6 and wireless power receiver U13; the circuit board lead interface P15 includes 6 interfaces; the wireless power receiver U13 includes interfaces CLAMP1, COMM1, AC1, AC2, BOOT1, BOOT2, CLAMP2, COMM2, OUT, CHG, ILIM, FOD, REC T, TS, EN1, EN2; one end of the capacitor C96 is connected in parallel with the capacitors C99 and C103 and connected to the AC1 interface of U13, and the other end of C96 is connected to the BOOT1 of U13; the other end of the capacitor C99 is connected to the interface CLAMP1 of U13; the other end of the capacitor C103 is connected to the interface COMM1 of U13; one end of the capacitor C97 is connected in parallel with the capacitors C100 and C104 and connected to the AC2 interface of U13, and the other end of C97 is connected to the BOOT2 of U13; the other end of the capacitor C100 is connected to the interface CLAMP2 of U13; The other end of the capacitor C104 is connected to the interface COMM2 of U13; the positive pole of the LED lamp D6 is connected to the interface OUT of U13, and the negative pole is connected to the interface CHG of U13; one end of the resistor R116 is connected to the interface ILIM of U13, and the other end is connected to the resistors R117 and R121, and the interface FOD of U13; one end of the resistor R117 is connected to the interface FOD of U13, and the other end is connected to the interface RECT of U13 and the filter capacitor C105; one end of the resistor R121 is connected to the interface FOD of U13, and the other end is connected to GND; one end of the capacitor C105 is connected to the interface FOD of U13, and the other end is connected to GND; RECT of U13, and the other end is connected to GND; one end of the resistor R119 is connected to VOUT, and the other end is connected to resistor R122 and interface 5 of P15, and the other end of resistor R122 is connected to GND; one end of the resistor R120 is connected to VOUT, and the other end is connected to resistor R123 and interface 6 of P15, and the other end of resistor R123 is connected to GND; the temperature measuring resistor RT1 is connected to interface TS of U13; interfaces 1 and 2 of P15 are connected to GND, interfaces 3 and 4 are connected to voltage source VOUT, interface 5 is connected to interface EN1 of U13, and interface 6 is connected to interface EN2 of U13.

[0031] When the generated induced voltage is delivered to the circuit through the copper coil 7, the internal synchronous rectifier feeds this voltage to the RECT pin with filter capacitor C105; the BQ51013 identifies and authenticates itself by switching the COM FET on and off, and by switching CCOMM on and off. If the authentication is successful, the transmitter will remain powered on;

[0032] The EN1 and EN2 pins include internal 200kΩ pull-down resistors, so if these pins are not connected, the wireless power receiver BQ51013 will default to AD-EN control mode;

[0033] However, these pins can be pulled high, as shown by resistors R119 and R120;

[0034] The BQ51013 provides two identical integrated communication FETs connected to pins COMM1 and COMM2. These FETs are used to modulate the secondary load current, enabling the BQ51013 to communicate error control and configuration information to the transmitter.

[0035] In addition to resistive load modulation, the BQ51013 is also capable of capacitive load modulation, as shown in the circuit on the left;

[0036] In this case, the capacitor is connected from COMM1 to AC1 and from COMM2 to AC2;

[0037] When the COMM switch is closed, a 22nF capacitor is actually connected between AC1 and AC2;

[0038] Connecting a capacitor between AC1 and AC2 modulates the impedance seen by the coil which will be reflected in the primary resistance as a change in current.

[0039] Temperature measurement implementation method of the present invention:

[0040] The temperature measuring device of the present invention is as shown in the attached Figure 5 As shown. This method uses an artificial K-type thermocouple based on the Seebeck effect to measure the tip temperature of a milling cutter with a blade. The specific implementation method is to attach a thermocouple 18 to the tip of the blade 17 (5mm from the front blade and 3mm from the back blade) through a heat-resistant tape to achieve temperature measurement. The thermocouple 18 is connected to the inside of the handle body 1 through the shank groove 1601 set on the milling cutter shank 16 and connected to the main control board 13 outside the shank through the square hole 108 to achieve signal and energy transmission. The temperature measurement end signal and the ambient temperature measured by the temperature monitoring circuit on the main control board 13 are compensated by the cold end to obtain the actual temperature of the tip measurement point. The shank groove 1601 has a size of 1mm×3mm.

[0041] Thermocouple detection circuit schematic diagram is as attached Figure 7As shown, the thermocouple detection circuit includes an analog conversion chip U6, transistors TVS1~TVS4, resistors R26~R43, and capacitors C22~C31; the analog conversion chip U6 includes 16 interfaces; it is assumed that THC_1P, THC_1N, THC_2P and THC_2N are thermocouple temperature signals from the vibration plate; taking the THC_1P connection as an example, one end of the TVS1 tube is connected to AGND, and the other end is connected to resistors R26 and R27; the other end of the resistor R26 is connected to AVDD, and the other end of the resistor R27 is connected to the resistor R28 and the capacitor C22 ; The other end of resistor R28 is connected to interface 6 (AIN3) of U6, and the other end of capacitor C22 is connected to power supply AVDD; THC_1N, THC_2P, THC_2N are connected in the same way as THC_1P; it is assumed that THC_1P, THC_1N, THC_2P and THC_2N are THC0P, THC0N, THC1P and THC1N after filtering circuit, which are respectively connected to interfaces 6 (AIN3), 7 (AIN2), 11 (AIN0) and 10 (AIN1) of U6; interface 1 (SCLK) of U6 is connected to PB3 of main control board U2;

[0042] Interface 2 (port CS) of U6 is connected to interface PA15 of the main control board U2; interface 14 (DRDY) of U6 is connected in series with resistor R35, and then connected to PB6 of the main control board U2; interface 15 (DOUT) of U6 is connected in series with resistor R33, and then connected to PB4 of the main control board U2; interface 16 (DIN) of U6 is connected in series with resistor R32, and then connected to PB5 of the main control board U2; power supplies AVDD and DVDD are connected in parallel with capacitors C29 and C30 and then connected to grounds ADND and DGND.

[0043] Thermocouple detection uses ADS1220 for analog conversion. The left side of the figure shows the thermocouple interface circuit, which has input pull-up and pull-down disconnection detection resistors, protection circuits and matching resistors. The parallel wiring method is used to connect the two ends of the two thermocouple wires to the two measurement ports of the instrument respectively. The average temperature can be measured, and the measurement paths do not affect each other.

[0044] The analog conversion circuit on the right has a voltage source on the top and a damped LC filter added to the LDO input to prevent noise from coupling to the ADC through the LDO. Both are generated using 5V VLDO_OUT, but are separated from each other by ferrite beads to prevent digital switching noise from entering the AVDD pin of the ADC. U6 below is the analog conversion chip ADS1220, which processes the temperature signal and transmits it to the main control board.

[0045] Because the output generated by the thermocouple circuit sensor is in the millivolt range, this makes the sensor susceptible to noise pickup. An RC low-pass differential filter and common-mode filter are designed before the circuit input, which is used before each analog input reaches the ADS1220. The filter can effectively eliminate any high-frequency noise that may exist. After filtering, it reaches the AIN3 and AIN2 ports and is transmitted to the ADS. Because it is a dual-channel differential design, its AIN0 and AIN1 ports have the same function and are used for the transmission of the temperature signal of the other channel.

[0046] As thermocouples are exposed to extreme environmental conditions, thermocouple wires tend to break or increase in wire resistance. Therefore, in critical applications, it is necessary to simply and quickly detect resistor breaks or increased resistance. The second purpose of the 1MΩ resistor is to provide a weak pull-up and pull-down for sensor open detection. If the sensor is disconnected, the input of the ADC will extend to the power supply and ground and produce a full-scale reading, indicating that the sensor is disconnected.

[0047] The above-described embodiments are only preferred embodiments of the present invention, and are not exhaustive of the feasible implementations of the present invention. For those skilled in the art, any obvious changes made thereto without departing from the principles and spirit of the present invention should be considered to be included in the scope of protection of the claims of the present invention.

Claims

1. A self-powered temperature measuring intelligent tool handle based on electromagnetic induction, characterized in that: The invention comprises a tool handle body (1) arranged on a spindle (15), a magnet support (5), a magnet (6), a copper coil (7), a tapered handle annular hole (103), a rectifier voltage stabilizing circuit, a milling cutter rod (16), a blade mounting screw (1602), a blade (17), a thermocouple (18), and a thermocouple detection circuit; the magnet support (5) is provided with a wedge-shaped groove, and the magnet (6) is connected to the magnet support (5) through the wedge-shaped groove; the magnet support (5) is arranged on the side of the interface between the spindle and the tool handle body (1), and the magnet support (5) is connected to the tool handle body (1) through the wedge-shaped groove. The bracket fastening screw (501) is arranged on the end surface mounting cover of the spindle (15); the magnet bracket (5) is manufactured by 3D printing of white resin material; the blade (17) and the milling cutter rod (16) are threadedly connected via the blade mounting screw (1602); the thermocouple (18) is arranged on the milling cutter rod (16), and the measuring end of the thermocouple (18) is arranged on the blade (17); the copper coil (7) is arranged in the tapered handle circular ring hole (103); the rectifying voltage stabilizing circuit and the thermocouple detection circuit are both arranged on the handle body (1); It also includes a bridge signal processing board (11), a power management board (12), a main control board (13), a WiFi board (14), a collet (2), a nut (3) and a milling cutter (4); four circuit board mounting platforms (109) are arranged in the middle of the tool handle body (1), and the circuit board mounting platforms (109) are provided with an upper row of fastening threaded through holes (110) and a lower row of fastening threaded blind holes (111); the signal processing board (11), the power management board (12), the main control board (13), and the WiFi board (14) are respectively arranged on the four circuit board mounting platforms (109) by means of an upper row of fastening screws (101) and a lower row of fastening screws (102), and the upper row of fastening screws (101) and the lower row of fastening screws (102) are respectively connected to the upper row of fastening threaded through holes (110) and the lower row of fastening screws (102). The conical handle ring hole (103) is provided with a coil lead hole (104), a circuit board lead groove (105) is provided between adjacent circuit board mounting platforms (109), and a circuit board lead hole (106) is provided on the circuit board mounting platform (109) that matches the power management board (12); the induced current in the copper coil (7) is transmitted to the power management board (12), the bridge signal processing board (11), the main control board (13), and the WiFi board (14) through the coil lead hole (104), the circuit board lead hole (106), and the circuit board lead groove (105); the collet (2), the nut (3), and the milling cutter (4) are sequentially arranged at the lower end of the handle body (1), and the rectifying and voltage stabilizing circuit is arranged on the power management board (12).

2. The electromagnetic induction-based self-powered temperature-measuring intelligent knife handle according to claim 1, characterized in that: The rectifier and voltage stabilizing circuit includes 6 circuit board lead interfaces P15, capacitors C94~C97, C99~C100, C103~C105, resistors R116~R123, temperature measuring resistor RT1, LED lamp D6 and wireless power receiver U13; the circuit board lead interface P15 includes 6 interfaces; the wireless power receiver U13 includes interfaces CLAMP1, COMM1, AC1, AC2, BOOT1, BOOT2, CLAMP2, COMM2, OUT, CHG, ILIM, FOD, RECT, TS, EN1, EN2; one end of the capacitor C96 is connected in parallel with the capacitors C99 and C103 and connected to the AC1 interface of U13, and the other end of C96 is connected to the BOOT1 of U13; the other end of the capacitor C99 is connected to the interface CLAMP1 of U13; the other end of the capacitor C103 is connected to the interface COMM1 of U13; one end of the capacitor C97 is connected in parallel with the capacitors C100 and C104 and connected to the AC2 interface of U13, and the other end of C97 is connected to the BOOT2 of U13; the other end of the capacitor C100 is connected to the interface CLAMP2 of U13; The other end of capacitor C104 is connected to the interface COMM2 of U13; the positive pole of the LED lamp D6 is connected to the interface OUT of U13, and the negative pole is connected to the interface CHG of U13; one end of the resistor R116 is connected to the interface ILIM of U13, and the other end is connected to the resistors R117 and R121, and the interface FOD of U13; one end of the resistor R117 is connected to the interface FOD of U13, and the other end is connected to the interface RECT of U13 and the filter capacitor C105; one end of the resistor R121 is connected to the interface FOD of U13, and the other end is connected to GND; one end of the capacitor C105 is connected to RECT of U13, and the other end is connected to GND; one end of the resistor R119 is connected to VOUT, and the other end is connected to resistor R122 and interface 5 of P15, and the other end of resistor R122 is connected to GND; one end of the resistor R120 is connected to VOUT, and the other end is connected to resistor R123 and interface 6 of P15, and the other end of resistor R123 is connected to GND; the temperature measuring resistor RT1 is connected to interface TS of U13; interfaces 1 and 2 of P15 are connected to GND, interfaces 3 and 4 are connected to voltage source VOUT, interface 5 is connected to interface EN1 of U13, and interface 6 is connected to interface EN2 of U13.

3. The electromagnetic induction-based self-powered temperature-measuring intelligent knife handle according to claim 1 or 2, characterized in that: It also includes a shank groove (1601) and a lead wire square hole (108); the milling cutter shank (16) is connected to the shank body (1) via a collet (2) and a nut (3); the milling cutter shank (16) is provided with shank grooves (1601) along the blade installation side; the thermocouple (18) is adhered to the cutting edge tip of the blade (7) via a heat-resistant tape; the thermocouple (18) is connected to the main control board (13) on the surface of the shank via the shank groove (1601) and the lead wire square hole (108).

4. The electromagnetic induction-based self-powered temperature-measuring intelligent knife handle according to claim 1, characterized in that: The thermocouple detection circuit includes an analog conversion chip U6, transistors TVS1~TVS4, resistors R26~R43, and capacitors C22~C31; the analog conversion chip U6 includes 16 interfaces; THC_1P, THC_1N, THC_2P and THC_2N are thermocouple temperature signals from the vibration plate; one end of TVS1 is connected to AGND , the other end is connected to resistors R26 and R27; the other end of resistor R26 is connected to AVDD, the other end of resistor R27 is connected to resistor R28 and capacitor C22; the other end of resistor R28 is connected to interface 6 of U6, and the other end of capacitor C22 is connected to power supply AVDD; THC_1N, THC_2P, THC_2N are connected in the same way as THC_1P; THC_1P, THC_1N, THC_2P and THC_2N are THC0P, THC0N, THC1P and THC1N after filtering circuit, and the filtered signals are connected to interface 6, interface 7, interface 11 and interface 10 of U6 respectively; interface 1 of U6 is connected to PB3 of main control board U2; Interface 2 of U6 is connected to interface PA15 of main control board U2; interface 14 of U6 is connected in series with resistor R35 and then connected to PB6 of main control board U2; interface 15 of U6 is connected in series with resistor R33 and then connected to PB4 of main control board U2; interface 16 of U6 is connected in series with resistor R32 and then connected to PB5 of main control board U2; power supplies AVDD and DVDD are connected in parallel with capacitors C29 and C30 and then connected to grounds ADND and DGND.

5. The electromagnetic induction-based self-powered temperature-measuring intelligent knife handle according to claim 1 or 2, characterized in that: The tapered shank annular holes (103) are arranged on the tapered shank of the tool handle body (1); the number of the tapered shank annular holes (103) is 3 or more and they are evenly arranged along the circumference of the tapered shank.

6. The electromagnetic induction-based self-powered temperature-measuring intelligent knife handle according to claim 1 or 2, characterized in that: The magnet (6) has a longitudinal section in the shape of an arc.

7. The electromagnetic induction-based self-powered temperature-measuring intelligent knife handle according to claim 3, characterized in that: The blade handle groove (1601) has a size of 1 mm×3 mm.

8. The electromagnetic induction-based self-powered temperature-measuring intelligent knife handle according to claim 3, characterized in that: The measuring end of the thermocouple (18) is pasted at a position 5 mm from the front cutting edge and 3 mm from the rear cutting edge.

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