Temperature adjusting circuit based on detection pulse rate and temperature rising instrument

Abstract

The utility model discloses a temperature adjusting circuit based on pulse rate detection and a temperature rise instrument, which are applied to the field of medical instruments. The temperature adjusting circuit based on the detection pulse rate comprises a pulse rate detection circuit, a temperature detection circuit, a main control circuit and a heating execution circuit, wherein the pulse rate detection circuit is connected with the main control circuit and is used for sending an obtained pulse rate to the main control circuit, so that the main control circuit determines a corresponding target temperature according to the pulse rate; the temperature detection circuit is connected with the heating device, the temperature detection circuit is connected with the main control circuit, and the temperature detection circuit is used for sending the actual temperature of the heating device to the main control circuit; the main control circuit is connected with the heating device through the heating execution circuit and used for controlling the heating execution circuit to adjust the temperature of the heating device according to the target temperature and the actual temperature. Therefore, the temperature of the heating device can be adjusted in real time according to the pulse rate change, the physiological comfort of the patient is ensured, rehabilitation and healing of the patient are promoted, and meanwhile the safety of the patient in the treatment period is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a temperature regulation circuit and a temperature riser based on pulse rate detection. Background Technology

[0002] Currently available medical heating devices output relatively constant temperature and airflow based on operator-set parameters, meaning the output temperature remains stable at the target temperature and does not change after a single setting. Furthermore, these devices can control the heating module output and trigger temperature anomaly alarms based on the deviation between the target and actual temperatures. However, patients' temperature protection needs vary significantly at different times and during different physiological activities. A constant output temperature from these devices not only fails to effectively maintain warmth but can also hinder patient recovery and even induce wound infections.

[0003] Given the aforementioned technologies, finding a heating device that can match the actual needs of users is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a temperature regulation circuit and a temperature riser based on pulse rate detection, which can solve the problem that in the prior art, medical temperature risers can only output heat energy at a constant temperature according to the set parameters, and cannot meet the temperature protection needs of patients at different times and during different physiological activities.

[0005] To solve the above-mentioned technical problems, on the one hand, this utility model provides a temperature regulation circuit based on pulse rate detection, including: a pulse rate detection circuit, a temperature detection circuit, a main control circuit, and a heating execution circuit;

[0006] The output of the pulse rate detection circuit is connected to the first input of the main control circuit, and is used to send the acquired pulse rate to the main control circuit so that the main control circuit can determine the corresponding target temperature based on the pulse rate.

[0007] The input terminal of the temperature detection circuit is connected to the input terminal of the heating device, and the output terminal of the temperature detection circuit is connected to the second input terminal of the main control circuit, which is used to send the actual temperature of the heating device to the main control circuit.

[0008] The output of the main control circuit is connected to the input of the heating device through the heating execution circuit. It is used to control the heating execution circuit to adjust the temperature of the heating device according to the target temperature and the actual temperature, so as to control the temperature of the heating device at the target temperature.

[0009] Preferably, the heating execution circuit includes: a heating control circuit and a fan control circuit;

[0010] The input terminal of the heating control circuit is connected to the input terminal of the fan control circuit, and together they are connected to the output terminal of the main control circuit.

[0011] The output of the heating control circuit is connected to the output of the fan control circuit, and is also connected to the input of the heating device through the air supply structure.

[0012] The heating control circuit is used to heat / cool the air, and the fan control circuit sends the heated / cooled air into the heating device through the air supply structure to form an air recirculation.

[0013] Preferably, the main control circuit includes: a microcontroller chip, a crystal oscillator circuit, a first RC filter circuit, and a second RC filter circuit;

[0014] In this circuit, the first and second pins of the microcontroller chip are connected together as the first input terminal of the main control circuit and the output terminal of the pulse rate detection circuit.

[0015] The third pin of the microcontroller chip is connected to the output of the temperature detection circuit as the second input terminal of the main control circuit.

[0016] The fourth and fifth pins of the microcontroller chip are used together as the output terminals of the main control circuit and are connected to the input terminals of the heating control circuit and the fan control circuit, respectively.

[0017] The sixth and seventh pins of the microcontroller chip are connected to the preset power supply unit through the first RC filter circuit and the second RC filter circuit, respectively.

[0018] The eighth and ninth pins of the microcontroller chip are connected to the first and second terminals of the crystal oscillator circuit, respectively.

[0019] Preferably, the pulse rate detection circuit includes: a blood oxygen detection circuit and a blood oxygen control circuit;

[0020] The first, second, third, fourth, and fifth output terminals of the blood oxygen detection circuit are connected to the first, second, third, fourth, and fifth input terminals of the blood oxygen control circuit, respectively.

[0021] The first and second signal terminals of the blood oxygen control circuit are connected together as the output terminals of the pulse rate detection circuit and the first input terminal of the main control circuit.

[0022] Preferably, the blood oxygen detection circuit includes: a blood oxygen probe, a first inductor, a second inductor, a first resistor, a second resistor, a third resistor, and a common-mode filter;

[0023] Among them, the first pin of the blood oxygen probe is connected to the first output terminal of the blood oxygen detection circuit and the first input terminal of the blood oxygen control circuit.

[0024] The second pin of the blood oxygen probe is connected to the first end of the first inductor and the first end of the first resistor. The second end of the first inductor is connected to the second output of the blood oxygen detection circuit and the second input of the blood oxygen control circuit.

[0025] The third pin of the blood oxygen probe is connected to the first end of the second inductor and the second end of the first resistor. The second end of the second inductor is connected to the third output terminal of the blood oxygen detection circuit and the third input terminal of the blood oxygen control circuit.

[0026] The fourth pin of the pulse oximeter is connected to the first terminal of the second resistor; the fifth pin of the pulse oximeter is connected to the first terminal of the third resistor; and the sixth pin of the pulse oximeter is grounded.

[0027] The second end of the second resistor is connected to the first pin of the common-mode filter, and the second pin of the common-mode filter is connected to the fourth input of the blood oxygen detection circuit as the fourth output of the blood oxygen control circuit.

[0028] The second end of the third resistor is connected to the third pin of the common-mode filter, and the fourth pin of the common-mode filter is connected to the fifth input of the blood oxygen detection circuit as the fifth output of the blood oxygen control circuit.

[0029] Preferably, the heating control circuit includes: a first wire harness connector, a first switching diode, a first bidirectional transient suppression diode, a first MOSFET, a fourth resistor, and a fifth resistor;

[0030] The first pin of the first wire harness connector is connected to the cathode of the first switching diode and the first end of the first bidirectional transient suppression diode, and together they serve as the output terminal of the heating control circuit and are connected to the input terminal of the heating device through the air supply structure.

[0031] The second pin of the first wire harness connector is connected to the anode of the first switching diode and the drain of the first MOSFET;

[0032] The gate of the first MOSFET is connected to the first terminal of the fourth resistor and the first terminal of the fifth resistor.

[0033] The source of the first MOSFET is connected to the second terminal of the fifth resistor and the second terminal of the first bidirectional transient suppression diode, and is grounded;

[0034] The second end of the fourth resistor is connected to the output end of the main control circuit as the input end of the heating control circuit.

[0035] Preferably, the fan control circuit includes: a second wiring harness connector, a second switching diode, a second bidirectional transient suppression diode, a second MOSFET, a sixth resistor, and a seventh resistor;

[0036] The first pin of the second wiring harness connector is connected to the cathode of the second switching diode and the first end of the second bidirectional transient suppression diode, and together they serve as the output terminal of the fan control circuit and are connected to the input terminal of the heating device through the air supply structure.

[0037] The second pin of the second wire harness connector is connected to the anode of the second switching diode and the drain of the second MOSFET;

[0038] The gate of the second MOSFET is connected to the first terminal of the sixth resistor and the first terminal of the seventh resistor.

[0039] The source of the second MOSFET is connected to the second terminal of the seventh resistor and the second terminal of the second bidirectional transient suppression diode, and is grounded;

[0040] The second end of the sixth resistor is connected to the output end of the main control circuit as the input end of the fan control circuit.

[0041] Preferably, it further includes: a human-machine interface communication circuit;

[0042] The communication terminal of the human-machine interface communication circuit is connected to the communication terminal of the main control circuit, and the control terminal of the human-machine interface communication circuit is connected to the display screen. It is used to communicate with the main control circuit through a serial port so that the operator can view or set relevant parameters through the display screen.

[0043] Preferably, the human-machine interface communication circuit includes: a communication conversion chip, a transistor logic circuit, and a level conversion circuit;

[0044] Among them, the first, second, third and fourth pins of the communication conversion chip are connected to the first, second, third and fourth terminals of the transistor logic circuit respectively through corresponding resistors, and together they serve as the communication terminal of the human-machine interface communication circuit and are connected to the communication terminal of the main control circuit.

[0045] The fifth, sixth, seventh, and eighth pins of the communication conversion chip are connected to the first, second, third, and fourth terminals of the level conversion circuit respectively through corresponding resistors, and together they serve as the control terminal of the human-machine interface communication circuit and are connected to the display screen.

[0046] On the other hand, this application also provides a temperature regulator, including the above-mentioned temperature regulation circuit based on the detection pulse rate.

[0047] Therefore, this application can detect the patient's pulse rate in real time while assisting in the protection of the patient's body temperature, and adjust the temperature of the heating device in real time according to the changes in the pulse rate, so as to ensure the patient's physiological comfort, promote the patient's recovery and healing, and improve the patient's safety during treatment. Attached Figure Description

[0048] To more clearly illustrate the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 A structural diagram of a temperature regulation circuit based on pulse rate detection is provided in an embodiment of this application;

[0050] Figure 2 A complete structural diagram of a temperature regulation circuit based on pulse rate detection is provided for an embodiment of this application;

[0051] Figure 3(a) is a first circuit diagram of the main control circuit provided in an embodiment of this application;

[0052] Figure 3(b) is a second circuit diagram of the main control circuit provided in the embodiment of this application;

[0053] Figure 4(a) is a first circuit diagram of the pulse rate detection circuit provided in an embodiment of this application;

[0054] Figure 4(b) is a second circuit diagram of the pulse rate detection circuit provided in the embodiment of this application;

[0055] Figure 4(c) is a third circuit diagram of the pulse rate detection circuit provided in the embodiment of this application;

[0056] Figure 5 A circuit diagram of the heating control circuit provided in the embodiments of this application;

[0057] Figure 6 A circuit diagram of the fan control circuit provided in the embodiments of this application;

[0058] Figure 7 A circuit diagram of the human-machine interface communication circuit provided in the embodiments of this application;

[0059] Figure 8 A circuit diagram of the temperature detection circuit provided in the embodiments of this application;

[0060] Figure 9 This is a schematic diagram of the PID control principle provided in the embodiments of this application;

[0061] Figure 10 This is a diagram showing the internal structure of the heating device provided in an embodiment of this application;

[0062] Figure 11 This is a structural diagram of the heating device provided in an embodiment of this application. Detailed Implementation

[0063] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0064] The core of this invention is to provide a temperature regulation circuit and a temperature riser based on pulse rate detection.

[0065] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] Figure 1 A structural diagram of a temperature regulation circuit based on pulse rate detection is provided in an embodiment of this application, as shown below. Figure 1 As shown, it includes: pulse rate detection circuit 1, temperature detection circuit 2, main control circuit 3, and heating execution circuit 4. In addition, Figure 1 It also includes a heating device 5. The circuit connection is as follows: the output terminal of the pulse rate detection circuit 1 is connected to the first input terminal of the main control circuit 3; the input terminal of the temperature detection circuit 2 is connected to the input terminal of the heating device 5, and the output terminal of the temperature detection circuit 2 is connected to the second input terminal of the main control circuit 3; the output terminal of the main control circuit 3 is connected to the input terminal of the heating device 5 through the heating execution circuit 4.

[0067] In a specific embodiment, the temperature regulation circuit based on pulse rate detection provided in this application is specifically applied in a medical heating device in the medical field. A medical heating device is a medical device that heats air using a heating component, and then uses a fan to circulate the heated air within a heating blanket, thereby providing uniform heating and temperature protection. Its principle of dynamically adjusting the heating temperature of the heating device by monitoring the patient's pulse rate in real time is as follows: A person's body temperature and pulse rate fluctuate throughout the day (a 1°C change in body temperature results in approximately 20 pulse rate changes per minute; generally, the pulse rate increases with rising body temperature), and different physiological activities also affect body temperature. When body temperature changes, the body's need for heat dissipation also changes in order to maintain physiological stability, i.e., the need for heat preservation changes.

[0068] The pulse rate detection circuit 1 in this application is a hardware-independent component. Patients need to wear a finger clip during use. The pulse rate detection circuit 1 calculates the patient's current pulse rate based on the acquired data and sends it to the main control circuit 3 via a serial port. The main control circuit 3 determines the corresponding target temperature based on the pulse rate. Simultaneously, the pulse rate detection circuit 1 also includes an abnormal alarm function. When the pulse rate consistently exceeds 120 BPM, falls below 50 BPM, or cannot be acquired, the heating device activates safety protection, stops heating, and generates an alarm.

[0069] Temperature detection circuit 2 collects and detects the temperature of heating device 5 (e.g., heating blanket) in real time. Main control circuit 3 calculates and analyzes the actual temperature of heating device 5 in real time, compares the actual temperature with the target temperature, and implements PID control of heating execution circuit 4. Simultaneously, temperature detection circuit 2 is equipped with an abnormal alarm function. When the actual temperature exceeds the temperature threshold or the actual temperature cannot be obtained, the heating device will protect itself, stop heating, and generate an alarm. When the heating device software fails and heating execution circuit 4 continues heating, hardware temperature protection will automatically disconnect the heating circuit, and this disconnection cannot be reversed until the temperature drops to a safe value.

[0070] The control algorithm of the heating execution circuit 4 adopts adaptive PID control and outputs via PWM, which can effectively avoid output fluctuations and overshoot. At the same time, the heating execution circuit 4 sends the heated / cooled air into the heating device 5 to form an air recirculation, thereby achieving uniform heating of the heating device 5.

[0071] It should be noted that the pulse rate detection circuit 1 in this application collects the patient's pulse rate, the temperature detection circuit 2 detects the actual temperature of the heating device 5 in real time, the main control circuit 3 analyzes and calculates, and the heating / cooling process of the heating execution circuit 4 is a cyclical process, and the final temperature of the heating device 5 is continuously optimized.

[0072] It should also be noted that this application does not limit the specific structure of the pulse rate detection circuit 1, temperature detection circuit 2, main control circuit 3 and heating execution circuit 4, nor does it limit the type of heating device 5. Users can set them according to their own needs.

[0073] This invention provides a temperature regulation circuit based on pulse rate detection, comprising: a pulse rate detection circuit, a temperature detection circuit, a main control circuit, and a heating execution circuit. The output of the pulse rate detection circuit is connected to the first input of the main control circuit, used to send the acquired pulse rate to the main control circuit so that the main control circuit can determine the corresponding target temperature based on the pulse rate. The input of the temperature detection circuit is connected to the input of the heating device, and the output of the temperature detection circuit is connected to the second input of the main control circuit, used to send the actual temperature of the heating device to the main control circuit. The output of the main control circuit is connected to the input of the heating device through the heating execution circuit, used to control the heating execution circuit to adjust the temperature of the heating device according to the target temperature and the actual temperature, so as to control the temperature of the heating device at the target temperature. Therefore, this application, while assisting in the protection of the patient's body temperature, can detect the patient's pulse rate in real time and adjust the temperature of the heating device in real time according to the pulse rate changes, ensuring the patient's physiological comfort, promoting the patient's recovery and healing, and improving the patient's safety during treatment.

[0074] Based on the above embodiments, as a preferred embodiment, such as... Figure 2 As shown, its temperature regulation circuit based on pulse rate detection also includes: a human-machine interface communication circuit 6 for connecting to the display screen 7; and the heating execution circuit 4 specifically includes: a heating control circuit 41 and a fan control circuit 42, which together achieve air recirculation with the heating device 5 through the air supply structure 8. The connection relationship is as follows: the input terminal of the heating control circuit 41 is connected to the input terminal of the fan control circuit 42, and both are connected to the output terminal of the main control circuit 3; the output terminal of the heating control circuit 41 is connected to the output terminal of the fan control circuit 42, and is connected to the input terminal of the heating device 5 through the air supply structure 8; the communication terminal of the human-machine interface communication circuit 6 is connected to the communication terminal of the main control circuit 3, and the control terminal of the human-machine interface communication circuit 6 is connected to the display screen 7.

[0075] In this embodiment, the specific working principle of the heating execution circuit 4 is as follows: the heating control circuit 41 adopts an adaptive PID control algorithm and outputs through PWM, which can effectively avoid output fluctuations and overshoot. The duty cycle of the heating control circuit 41 is adjustable from 0% to 100%. The fan control circuit 42 sends the air heated / cooled by the heating control circuit 41 into the heating device 5 through the air supply structure 8 to form an air recirculation, thereby achieving uniform heating of the heating device 5.

[0076] The human-machine interface communication circuit 6 communicates with the main control circuit 3 via a serial port. Operators can view or set relevant treatment parameters through the display screen 7, realizing the human-machine interaction function between the equipment and the operator.

[0077] It should be noted that the embodiments provided in this application are only one possible implementation method, but are not limited to this only implementation method. Users can set their own implementation methods according to their needs.

[0078] Therefore, based on this embodiment, the main control circuit is not only responsible for the control and safety monitoring of the heating execution circuit, namely the heating control circuit and the fan control circuit, but also for user interaction and system coordination.

[0079] In a specific embodiment, as shown in Figures 3(a) and 3(b), the main control circuit 3 includes: a microcontroller chip U1, a crystal oscillator circuit, a first RC filter circuit, and a second RC filter circuit. The crystal oscillator circuit includes: a crystal oscillator Y1, capacitors C210 and C212; the first RC filter circuit includes: a resistor R206 and a capacitor C211; and the second RC filter circuit includes: a resistor R207 and a capacitor C213. The internal connection relationship of its main control circuit 3 is as follows: the first pin PA10 and the second pin PA9 of the microcontroller chip U1 are connected to the first input terminal of the main control circuit 3 and the output terminal of the pulse rate detection circuit 1; the third pin PA1 of the microcontroller chip U1 is connected to the second input terminal of the main control circuit 3 and the output terminal of the temperature detection circuit 2; the fourth pin PC6 and the fifth pin PC7 of the microcontroller chip U1 are connected to the output terminal of the main control circuit 3 and the input terminal of the heating control circuit 41 and the fan control circuit 42, respectively; the sixth pin VBAT and the seventh pin NRST of the microcontroller chip U1 are connected to the preset power supply unit DC3.3V through the first RC filter circuit (resistor R206 and capacitor C211) and the second RC filter circuit (resistor R207 and capacitor C213), respectively; the eighth pin OSC_IN and the ninth pin OSC_OUT of the microcontroller chip U1 are connected to the first and second terminals of the crystal oscillator circuit (crystal Y1, capacitors C210 and C212), respectively.

[0080] Among them, the first pin PA10 of the microcontroller chip U1 is identified as RX1; the second pin PA9 is identified as TX1; the third pin PA1 is identified as TMP_DET; the fourth pin PC6 is identified as Ctrl_Vavlel1; the fifth pin PC7 is identified as Ctrl_Vavlel2; the pin PC10 is identified as TX4; and the pin PC11 is identified as RX4.

[0081] As shown in Figures 3(a) and 3(b), the PB2 pin of the microcontroller chip U1 is connected to resistor R202; the PB9 pin is connected to resistor R209; the PF5 pin is connected to resistor R205 and LED D203; the BOOT0 pin is connected to resistor R208; and the VREF+ and VDDA pins are connected to voltage V3VA.

[0082] It should be noted that PA0-PA15, PB0-PB15, PC0-PC13, PD0-PD15, PE0-PE15, VBAT, OSC_IN, OSC_OUT, NRST, VSSA, VREF-, VREF+, VDDA, BOOT0, NC, VSS, VDD, PC14 / OSC32_IN, and PC15 / OSC32_OUT in the microcontroller chip U1 are all pins of the microcontroller chip U1. Apart from the corresponding pins mentioned above, the remaining pins are connected to the peripheral circuits or used as empty pins, which will not be described in detail in this application.

[0083] Among them, the main control circuit 3 can use GD32F103VCT6 as the control platform, which can reduce costs and shorten the procurement cycle while meeting the circuit performance requirements.

[0084] In a specific embodiment, the pulse rate detection circuit 1 includes a blood oxygen detection circuit and a blood oxygen control circuit. The circuit connections are as follows: the first, second, third, fourth, and fifth output terminals of the blood oxygen detection circuit are connected to the first, second, third, fourth, and fifth input terminals of the blood oxygen control circuit, respectively; the first and second signal terminals of the blood oxygen control circuit together serve as the output terminals of the pulse rate detection circuit 1 and are connected to the first input terminal of the main control circuit 3.

[0085] Furthermore, as shown in Figure 4(a), its blood oxygen detection circuit includes: blood oxygen probe P1, first inductor L1, second inductor L2, first resistor R1, second resistor R2, third resistor R3, and common-mode filter DL1. As shown in Figures 4(b) and 4(c), its blood oxygen control circuit is mainly composed of blood oxygen control chip U2. The connection is as follows: the first pin (SENSOPID) of the pulse oxygen probe P1, serving as the first output of the pulse oxygen detection circuit, is connected to the first input of the pulse oxygen control circuit (i.e., the first pin of the pulse oxygen control chip U2); the second pin (red light drive signal terminal) of the pulse oxygen probe P1 is connected to the first terminal of the first inductor L1 and the first terminal of the first resistor R1, and the second terminal of the first inductor L1 serves as the second output of the pulse oxygen detection circuit and is connected to the second input of the pulse oxygen control circuit (i.e., the second pin of the pulse oxygen control chip U2); the third pin (infrared light drive signal terminal) of the pulse oxygen probe P1 is connected to the first terminal of the second inductor L2 and the second terminal of the first resistor R1, and the second terminal of the second inductor L2 serves as the third output of the pulse oxygen detection circuit and is connected to the third input of the pulse oxygen control circuit (i.e., the third pin of the pulse oxygen control chip U2); the fourth pin (positive PD+ of the photodetector) of the pulse oxygen probe P1 is connected to the first terminal of the second resistor R2; the pulse oxygen probe... The fifth pin of the head P1 (positive PD- of the photodetector) is connected to the first end of the third resistor R3; the sixth pin (GND) of the blood oxygen probe P1 is grounded; the second end of the second resistor R2 is connected to the first pin of the common-mode filter LD1, and the second pin of the common-mode filter LD1 is connected to the fourth input of the blood oxygen detection circuit (i.e., the fourth pin of the blood oxygen control chip U2) as the fourth output of the blood oxygen detection circuit; the second end of the third resistor R3 is connected to the third pin of the common-mode filter LD1, and the fourth pin of the common-mode filter LD1 is connected to the fifth input of the blood oxygen control circuit (i.e., the fifth pin of the blood oxygen control chip U2) as the fifth output of the blood oxygen detection circuit; the first signal terminal and the second signal terminal (the sixth and seventh pins of the blood oxygen control chip U2) of the blood oxygen control circuit are connected to the first input of the main control circuit 3 as the output of the pulse rate detection circuit 1; the eighth pin of the blood oxygen control chip U2 is connected to the power supply VCC 3.3V.

[0086] Specifically, the identifiers for the first pin (SENSOP ID) of the pulse oxygen probe P1 and the first pin of the pulse oxygen control chip U2 are: JD1; the identifiers for the second terminal of the first inductor L1 and the second pin of the pulse oxygen control chip U2 are: RED1; the identifiers for the second terminal of the second inductor L2 and the third pin of the pulse oxygen control chip U2 are: JR1; the identifiers for the second pin of the common-mode filter LD1 and the fourth pin of the pulse oxygen control chip U2 are: PD1_P; the identifiers for the fourth pin of the common-mode filter LD1 and the fifth pin of the pulse oxygen control chip U2 are: PD1_N; the identifier for the sixth pin of the pulse oxygen control chip U2 is: RX1; and the identifier for the seventh pin of the pulse oxygen control chip U2 is: TX1.

[0087] The pulse oximetry control circuit uses a pulse oximetry control chip U2 (e.g., a Qchip 12 pulse oximetry module) to perform its functions. The pulse oximetry control chip U2 is connected to the finger clip-type pulse oximetry probe P1, enabling real-time acquisition of the patient's pulse rate. The acquisition range is 20–255 BPM, with a measurement accuracy of 1 BPM. The pulse oximetry control circuit communicates with the main control circuit 3 via a serial port, sending the pulse rate acquisition results to the main control circuit 3 at a frequency of 10 Hz.

[0088] In specific embodiments, such as Figure 5 As shown, its heating control circuit 41 includes: a first wiring harness connector P2, a first switching diode D1, a first bidirectional transient suppression diode TVS1, a first MOSFET Q1, a fourth resistor R4, and a fifth resistor R5. The connections are as follows: the first pin of the first wiring harness connector P2 is connected to the cathode of the first switching diode D1 and the first terminal of the first bidirectional transient suppression diode TVS1, and together they serve as the output terminal of the heating control circuit 41, connected to the input terminal of the heating device 5 via the air supply structure 8; the second pin of the first wiring harness connector P2 is connected to the anode of the first switching diode D1 and the drain of the first MOSFET Q1; the gate of the first MOSFET Q1 is connected to the first terminal of the fourth resistor R4 and the first terminal of the fifth resistor R5; the source of the first MOSFET Q1 is connected to the second terminal of the fifth resistor R5 and the second terminal of the first bidirectional transient suppression diode TVS1, and grounded; the second terminal of the fourth resistor R4 serves as the input terminal of the heating control circuit 41 and is connected to the output terminal of the main control circuit 3.

[0089] The second terminal of the fourth resistor R4 is labeled as Ctrl_Vavlel1; the first pin of the first wire harness connector P2 and the cathode of the first switching diode D1 are labeled as DC_IN.

[0090] like Figure 6As shown, the fan control circuit 42 includes: a second wiring harness connector P3, a second switching diode D2, a second bidirectional transient suppression diode TVS2, a second MOSFET Q2, a sixth resistor R6, and a seventh resistor R7. Their connections are as follows: the first pin of the second wiring harness connector P3 is connected to the cathode of the second switching diode D2 and the first terminal of the second bidirectional transient suppression diode TVS2, and together they serve as the output terminal of the fan control circuit 42, connected to the input terminal of the heating device 5 via the air supply structure 8; the second pin of the second wiring harness connector P3 is connected to the anode of the second switching diode D2 and the drain of the second MOSFET Q2; the gate of the second MOSFET Q2 is connected to the first terminal of the sixth resistor R6 and the first terminal of the seventh resistor R7; the source of the second MOSFET Q2 is connected to the second terminal of the seventh resistor R7 and the second terminal of the second bidirectional transient suppression diode TVS2, and grounded; the second terminal of the sixth resistor R6 serves as the input terminal of the fan control circuit 42 and is connected to the output terminal of the main control circuit 3.

[0091] The second terminal of the sixth resistor R6 is labeled as Ctrl_Vavlel2; the first pin of the second wiring harness connector P3 and the cathode of the second switching diode D2 are labeled as DC_IN.

[0092] The heating control circuit 41 and the fan control circuit 42 have the same structure and the same working principle. The heating control circuit 41 / fan control circuit 42 uses a series resistor at the gate of the first MOSFET Q1 / second MOSFET Q2 to control the conduction timing of the MOSFETs, which can greatly improve the electromagnetic radiation of the system. The control signal uses a timer to output a PWM signal, and the duty cycle of the heating control circuit 41 and the fan control circuit 42 can be adjusted by adjusting the PWM parameters.

[0093] Based on the above embodiments, such as Figure 7As shown, the human-machine interface communication circuit 6 includes: a communication conversion chip U3, a transistor logic circuit, and a level conversion circuit. The transistor logic circuit includes: light-emitting diodes D500, D501, D502, and D503, and resistors R509, R510, R513, and R519; the level conversion circuit includes: capacitors C513, C516, C517, and C515. The connection relationships are as follows: the first, second, third, and fourth pins of the communication conversion chip are connected to the first terminal (cathode of LED D500), the second terminal (cathode of LED D501), the third terminal (cathode of LED D502), and the fourth terminal (cathode of LED D503) of the transistor logic circuit respectively through corresponding resistors (R512, R515, R516, R520), and together they serve as the communication terminal of the human-machine interface communication circuit 6 and are connected to the communication terminal of the main control circuit 3; the fifth, sixth, seventh, and eighth pins of the communication conversion chip are connected to the first terminal (first terminal of C513), the second terminal (first terminal of C517), the third terminal (first terminal of C516), and the fourth terminal (first terminal of C515) of the level conversion circuit respectively through corresponding resistors (R511, R514, R517, R518), and together they serve as the control terminal of the human-machine interface communication circuit 6 and are connected to the display screen 7.

[0094] In addition, it can be determined that around the communication conversion chip U3, its pins C1+ and C1- are connected to capacitor C506; pins C2+ and C2- are connected to capacitor C508; pins VCC and V+ are connected to capacitors C506 and C507 and the preset power supply unit DC3.3V; pin GND is grounded; and pin V- is connected to capacitor C514.

[0095] The identifiers corresponding to the communication terminals of the human-machine interface communication circuit 6 are: RX1, RX4, TX1, TX4; the identifiers corresponding to the control terminals of the human-machine interface communication circuit 6 are: TXD4_RS232, TXD1_RS232, RXD4_RS232, RXD1_RS232.

[0096] Since human-computer interaction requires interaction with the operator, the display screen 7 can be a capacitive touch screen.

[0097] In addition, such as Figure 8 As shown, the temperature detection circuit 2 includes a pull-up resistor R10 and a temperature sensor P4. The GND and VDD pins of the temperature sensor P4 are connected and grounded; the DQ pin is connected to the first end of the pull-up resistor R10, and together they serve as the output terminal of the temperature detection circuit 2, connected to the second input terminal of the main control circuit 3; the second end of the pull-up resistor is connected to the power supply VCC.

[0098] The identifier for the first terminal of the pull-up resistor R10 and the corresponding pin DQ is: TMP_DET.

[0099] The temperature detection circuit 2 uses a DS18B20 temperature sensor to achieve temperature acquisition and processing. The temperature detection circuit 2 communicates with the main control circuit 3 via a single bus. The temperature detection circuit 2 is powered by 3.3V and can measure temperatures from -55℃ to +125℃. Within the range of -10℃ to +85℃, the accuracy can reach ±0.5℃, which meets the design requirements.

[0100] It should be noted that Figure 3- Figure 8 When the identifiers corresponding to the pins or endpoints are the same, it indicates that the two pins or endpoints are connected.

[0101] Therefore, the temperature regulation circuit based on pulse rate detection provided in this application can detect the patient's pulse rate in real time while assisting in the protection of the patient's body temperature, and adjust the temperature of the heating device in real time according to the changes in pulse rate. This ensures the patient's physiological comfort, promotes the patient's recovery and healing, and improves the patient's safety during treatment. The principle is as follows:

[0102] Principle 1: The heating execution circuit in the pulse rate-based temperature regulation circuit provided in this application consists of a heating control circuit that heats / cools the air, and a fan control circuit that drives the heated / cooled air to circulate through the heating device. When the heat provided by the heating control circuit matches the heat dissipated by the heating device, the temperature of the heating device remains stable. Therefore, the waveform of the heating device temperature value collected by the temperature detection circuit is a damped waveform that gradually approaches a straight line.

[0103] Principle 2: Pulse rate and body temperature are both physiological indicators. Changes in body temperature typically affect pulse rate; for example, pulse rate increases during fever and may decrease during hypothermia. Pulse rate can also change due to metabolic variations. From a physiological perspective, body temperature affects pulse rate, and pulse rate reflects changes in body temperature. When the body's core temperature rises, metabolism accelerates, and heart rate also increases, increasing the body's need for heat dissipation. Conversely, when the body's core temperature decreases, metabolism slows, and heart rate decreases, reducing the body's need for heat dissipation. The body's heat dissipation capacity is directly proportional to the difference between body temperature and ambient temperature; the greater the temperature difference, the faster the heat dissipation. Therefore, the pulse rate has a positive linear relationship with changes in body temperature, and body temperature changes have a positive linear relationship with heat dissipation demand. Heat dissipation capacity has an inverse linear relationship with the temperature difference between body temperature and the ambient temperature. In other words, the pulse rate has a positive linear relationship with body temperature and an inverse linear relationship with ambient temperature.

[0104] Its pulse rate-based temperature regulation circuit operates as follows:

[0105] 1. Standby Configuration: After the circuit starts running, it first enters standby mode. The operator sets the fan speed of the thermometer, the patient's age, and the usage environment on the display screen. When the operator clicks "Start Running," the system in the circuit starts the timer, with a timing frequency of 100Hz (i.e., collecting a temperature value once every 10 milliseconds). The pulse rate detection circuit transmits at a frequency of 10Hz (transmitting a pulse rate value once every 100 milliseconds).

[0106] 2. Circuit Operation: After the circuit starts running, when the timer expires, the real-time data detected by the temperature detection circuit is collected in the timer interrupt function and put into a FIFO (First In First Out) buffer with a buffer depth of 7 points. At the same time, the data in the buffer is filtered (after removing the maximum and minimum values, the average value is calculated) and the result is put into the variable RealDat1.

[0107] Its RealDat1 is a 16-bit binary data, and the meaning of each bit is shown in Table 1. Its BIT15-BIT11 are the temperature sign bits: 0 indicates that the temperature sign is '+'; BIT10-BIT4 are the integer part of the temperature; BIT3-BIT0 are the fractional part of the temperature.

[0108] The actual temperature is calculated by converting the variable RealDat1. The actual temperature is then magnified by 10 times, rounded, and stored in the variable RealDat2 (the actual temperature is accurate to one decimal place).

[0109] The pulse rate obtained by parsing the pulse rate data packet received from the serial port is stored in the variable RealDat3.

[0110] The target temperature is calculated using pulse rate analysis and stored in the variable RealDat4.

[0111] Table 1

[0112]

[0113] 3. Adaptive Algorithm: The main factor affecting the heating target temperature of the thermostat is the human pulse rate; when the thermostat starts, the system first obtains the patient's pulse rate to calculate the target temperature; at the same time, it collects and calculates the current actual temperature.

[0114] The heating temperature of the heater is calculated from the actual pulse rate and then updated.

[0115] The duty cycle of the heating control circuit is obtained by using a PID algorithm based on the difference between the target temperature and the current actual temperature, thereby changing the energy output of the heating control circuit.

[0116] The system continuously acquires the target temperature and the current actual temperature during operation, and adjusts the system to achieve dynamic consistency between the target temperature and the actual temperature.

[0117] The PID control principle is as follows: Figure 9 As shown, and the specific principle has been explained in detail in the above embodiments, this application will not repeat it here.

[0118] Therefore, this application, through the established mathematical model, creates an algorithm that can effectively obtain the optimal temperature requirement of the human body based on changes in pulse rate, thereby dynamically adjusting the target heating temperature of the thermostat. Furthermore, based on real-time body temperature protection, this application creates an adaptive algorithm that can adjust the target heating temperature in real time according to the patient's pulse rate, ensuring the patient's physiological comfort, promoting recovery and healing, and improving patient safety during treatment.

[0119] On the other hand, this application also provides a heating device, including the above-mentioned temperature regulation circuit based on pulse rate detection, that is, including: pulse rate detection circuit 1, temperature detection circuit 2, main control circuit 3, heating control circuit 41, fan control circuit 42, heating device 5, human-machine interface communication circuit 6, display screen 7, and air supply structure 8.

[0120] In addition, it also includes the corresponding handle 9, housing 10, glass panel 11, and air outlet 12, such as Figure 10 and Figure 11 As shown.

[0121] Since the embodiments of the heating device provided in this application are the same as the embodiments of the temperature regulation circuit based on the detection pulse rate described above, and have the same beneficial effects, this application will not elaborate further here.

[0122] The present invention provides a detailed description of a temperature regulation circuit and a temperature riser based on pulse rate detection. The various embodiments are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0123] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A temperature regulation circuit based on pulse rate detection, characterized in that, include: Pulse rate detection circuit, temperature detection circuit, main control circuit, and heating execution circuit; The output of the pulse rate detection circuit is connected to the first input of the main control circuit, and is used to send the acquired pulse rate to the main control circuit so that the main control circuit can determine the corresponding target temperature based on the pulse rate. The input terminal of the temperature detection circuit is connected to the input terminal of the heating device, and the output terminal of the temperature detection circuit is connected to the second input terminal of the main control circuit, which is used to send the actual temperature of the heating device to the main control circuit. The output terminal of the main control circuit is connected to the input terminal of the heating device through the heating execution circuit, and is used to control the heating execution circuit to adjust the temperature of the heating device according to the target temperature and the actual temperature, so as to control the temperature of the heating device at the target temperature.

2. The temperature regulation circuit based on pulse rate detection according to claim 1, characterized in that, The heating execution circuit includes: a heating control circuit and a fan control circuit; The input terminal of the heating control circuit is connected to the input terminal of the fan control circuit, and both are connected to the output terminal of the main control circuit. The output terminal of the heating control circuit is connected to the output terminal of the fan control circuit, and is connected to the input terminal of the heating device through the air supply structure. The heating control circuit is used to heat / cool air, and the fan control circuit sends the heated / cooled air into the heating device through the air supply structure to form an air recirculation.

3. The temperature regulation circuit based on pulse rate detection according to claim 2, characterized in that, The main control circuit includes: a microcontroller chip, a crystal oscillator circuit, a first RC filter circuit, and a second RC filter circuit; The first and second pins of the microcontroller chip are connected together as the first input terminal of the main control circuit and the output terminal of the pulse rate detection circuit. The third pin of the microcontroller chip is connected to the output of the temperature detection circuit as the second input terminal of the main control circuit. The fourth and fifth pins of the microcontroller chip together serve as the output terminals of the main control circuit, and are respectively connected to the input terminals of the heating control circuit and the fan control circuit. The sixth and seventh pins of the microcontroller chip are connected to the preset power supply unit through the first RC filter circuit and the second RC filter circuit, respectively. The eighth and ninth pins of the microcontroller chip are connected to the first and second terminals of the crystal oscillator circuit, respectively.

4. The temperature regulation circuit based on pulse rate detection according to claim 2, characterized in that, The pulse rate detection circuit includes: a blood oxygen detection circuit and a blood oxygen control circuit; The first, second, third, fourth, and fifth output terminals of the blood oxygen detection circuit are respectively connected to the first, second, third, fourth, and fifth input terminals of the blood oxygen control circuit. The first and second signal terminals of the blood oxygen control circuit are connected together as the output terminals of the pulse rate detection circuit and the first input terminal of the main control circuit.

5. The temperature regulation circuit based on pulse rate detection according to claim 4, characterized in that, The blood oxygen detection circuit includes: a blood oxygen probe, a first inductor, a second inductor, a first resistor, a second resistor, a third resistor, and a common-mode filter; The first pin of the blood oxygen probe is connected to the first input of the blood oxygen detection circuit as the first output terminal of the blood oxygen detection circuit. The second pin of the blood oxygen probe is connected to the first end of the first inductor and the first end of the first resistor. The second end of the first inductor is connected to the second input end of the blood oxygen detection circuit as the second output end of the blood oxygen control circuit. The third pin of the blood oxygen probe is connected to the first end of the second inductor and the second end of the first resistor. The second end of the second inductor is connected to the third input of the blood oxygen detection circuit as the third output of the blood oxygen detection circuit. The fourth pin of the blood oxygen probe is connected to the first terminal of the second resistor; the fifth pin of the blood oxygen probe is connected to the first terminal of the third resistor; and the sixth pin of the blood oxygen probe is grounded. The second end of the second resistor is connected to the first pin of the common-mode filter, and the second pin of the common-mode filter is connected to the fourth input of the blood oxygen detection circuit as the fourth output of the blood oxygen control circuit. The second end of the third resistor is connected to the third pin of the common-mode filter, and the fourth pin of the common-mode filter is connected to the fifth input of the blood oxygen detection circuit as the fifth output of the blood oxygen detection circuit.

6. The temperature regulation circuit based on pulse rate detection according to claim 2, characterized in that, The heating control circuit includes: a first wire harness connector, a first switching diode, a first bidirectional transient suppression diode, a first MOSFET, a fourth resistor, and a fifth resistor; The first pin of the first wire harness connector is connected to the cathode of the first switching diode and the first end of the first bidirectional transient suppression diode, and together they serve as the output terminal of the heating control circuit and are connected to the input terminal of the heating device through the air supply structure. The second pin of the first wire harness connector is connected to the anode of the first switching diode and the drain of the first MOSFET; The gate of the first MOS transistor is connected to the first terminal of the fourth resistor and the first terminal of the fifth resistor; The source of the first MOSFET is connected to the second terminal of the fifth resistor and the second terminal of the first bidirectional transient suppression diode, and is grounded; The second end of the fourth resistor is connected to the output end of the main control circuit as the input end of the heating control circuit.

7. The temperature regulation circuit based on pulse rate detection according to claim 2, characterized in that, The wind turbine control circuit includes: a second wiring harness connector, a second switching diode, a second bidirectional transient suppression diode, a second MOSFET, a sixth resistor, and a seventh resistor; The first pin of the second wire harness connector is connected to the cathode of the second switching diode and the first end of the second bidirectional transient suppression diode, and together they serve as the output terminal of the fan control circuit and are connected to the input terminal of the heating device through the air supply structure. The second pin of the second wire harness connector is connected to the anode of the second switching diode and the drain of the second MOSFET; The gate of the second MOS transistor is connected to the first terminal of the sixth resistor and the first terminal of the seventh resistor; The source of the second MOSFET is connected to the second terminal of the seventh resistor and the second terminal of the second bidirectional transient suppression diode, and is grounded; The second end of the sixth resistor is connected to the output end of the main control circuit as the input end of the fan control circuit.

8. The temperature regulation circuit based on pulse rate detection according to any one of claims 1-7, characterized in that, Also includes: Human-machine interface communication circuit; The communication terminal of the human-machine interface communication circuit is connected to the communication terminal of the main control circuit, and the control terminal of the human-machine interface communication circuit is connected to the display screen for communicating with the main control circuit via a serial port, so that the operator can view or set relevant parameters through the display screen.

9. The temperature regulation circuit based on pulse rate detection according to claim 8, characterized in that, The human-machine interface communication circuit includes: a communication conversion chip, a transistor logic circuit, and a level conversion circuit; The first, second, third, and fourth pins of the communication conversion chip are connected to the first, second, third, and fourth terminals of the transistor logic circuit respectively through corresponding resistors, and together serve as the communication terminal of the human-machine interface communication circuit connected to the communication terminal of the main control circuit. The fifth, sixth, seventh, and eighth pins of the communication conversion chip are connected to the first, second, third, and fourth terminals of the level conversion circuit respectively through corresponding resistors, and together they serve as the control terminal of the human-machine interface communication circuit and are connected to the display screen.

10. A heating device, characterized in that, Including the temperature regulation circuit based on pulse rate detection as described in any one of claims 1-9.

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