A high-efficiency real-time constant-temperature control measuring device
By combining heating unit, control unit and temperature acquisition unit, the problems of high cost and large space occupation of traditional constant temperature control devices are solved, realizing efficient and real-time constant temperature control, and improving the accuracy and efficiency of heat dissipation structure testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INTELLIGENT AUTOMATION ZHUHAI CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-07-10
AI Technical Summary
In the existing technology, traditional constant temperature control devices are expensive and bulky, resulting in high production and testing line costs and increased space occupation. They are also difficult to effectively simulate the stability of heat sources, affecting the accuracy of heat dissipation structure testing.
The system employs a heating unit, a control unit, and a temperature acquisition unit. The processor and heating control module, connected by electrical signals, include a dual-channel control module, a controllable power output module, a controllable constant current source module, and a current acquisition module. This enables temperature control and current monitoring of the heating unit, ensuring the accuracy and speed of constant temperature control.
It achieves efficient and real-time constant temperature control, reduces equipment costs, minimizes space occupation, and improves the accuracy and efficiency of heat dissipation structure testing.
Smart Images
Figure CN224481814U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of temperature testing, and in particular to a high-efficiency real-time constant temperature control and measurement device. Background Technology
[0002] As consumer electronics become increasingly powerful, the demands on product performance are also rising. This increased performance leads to higher heat generation, placing greater emphasis on the heat dissipation structure. Manufacturers need to test the performance of their developed heat dissipation structures to obtain various performance indicators. This testing typically involves simulating a heat source using a heating device, collecting temperature data, and analyzing the data based on the set temperature of the heating device. To ensure accurate test results, interference from the simulated heat source must be avoided, requiring high stability from the simulated heat source. Traditional temperature control devices usually employ standard instruments to control the power of the heating plate and provide a stable simulated heat source. However, standard instruments are expensive and bulky, leading to excessive costs and increased space requirements on production testing lines.
[0003] Therefore, there is a need for a high-efficiency real-time constant temperature control and measurement device that provides constant temperature control and monitoring for simulated heat sources, in order to overcome the shortcomings of existing technologies. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an efficient real-time constant temperature control and measurement device for providing constant temperature control and monitoring for simulated heat sources.
[0005] The technical solution adopted by this utility model is as follows: This utility model includes a heating unit, a control unit, and a temperature acquisition unit. The control unit includes a processor and a heating control module connected by electrical signals. The temperature acquisition unit acquires the temperature data of the heating unit and is connected by electrical signals to the processor. The heating control module includes a dual-channel control module, a controllable power output module, a controllable constant current source module, and a current acquisition module. One output of the dual-channel control module is connected to the controllable power output module, and the other output of the dual-channel control module is connected to the controllable constant current source module. The output of the controllable power output module is connected to the controllable constant current source module, and the controllable constant current source module is electrically connected to the heating unit.
[0006] As can be seen from the above scheme, the heating unit serves as a simulated heat source, allowing it to be used in conjunction with the heat dissipation structure under test for heat dissipation performance testing. The operating status of the heating unit is monitored by the control unit and the temperature acquisition unit, thereby ensuring constant temperature control of the heating unit. By setting up the current acquisition module and the temperature acquisition unit to monitor the operating current, the processor can more accurately regulate the controllable power output module and the controllable constant current source module. The controllable power output module outputs the operating voltage to the heating unit, while the controllable constant current source module regulates the current in the heating unit circuit, thereby ensuring effective and rapid temperature control of the heating unit.
[0007] In a preferred embodiment, the dual-channel control module includes a digital-to-analog converter (DAC), the communication port of which is connected to the processor, the VOUTA port of which is connected to the feedback port of the controllable power output module, and the VOUTB port of which is connected to the control port of the controllable constant current source module.
[0008] In a preferred embodiment, the controllable power output module includes a step-down converter, the input of which is connected to a power supply, and the output of which is electrically connected to the heating unit via the input of a connection terminal. The controllable constant current source is connected to the output of the connection terminal.
[0009] A further preferred embodiment is that the controllable constant current source module includes an error amplifier, a field-effect transistor, a feedback resistor, and a first operational amplifier. The field-effect transistor and the feedback resistor are connected in series between the output terminal of the connection terminal and the ground line. A pair of input terminals of the first operational amplifier are connected in parallel to the two ends of the feedback resistor. The output terminal of the first operational amplifier is connected to the negative input terminal of the error amplifier. The positive input terminal of the error amplifier is connected to the dual-channel control module. The output terminal of the error amplifier is connected to the gate of the field-effect transistor.
[0010] A further preferred embodiment is that the current acquisition module includes a second operational amplifier and a first analog-to-digital converter, the input terminal of the second operational amplifier is connected to the output terminal of the first operational amplifier, the output terminal of the second operational amplifier is connected to the input terminal of the first analog-to-digital converter, and the output terminal of the first analog-to-digital converter is electrically connected to the processor.
[0011] In a preferred embodiment, the temperature acquisition unit includes a sensor and a second analog-to-digital converter (ADC). The sensor works in conjunction with the heating unit. The acquisition terminal of the second ADC is electrically connected to the sensor, and the communication terminal of the second ADC is electrically connected to the processor. Attached Figure Description
[0012] Figure 1 This is a system block diagram of this utility model;
[0013] Figure 2 This is the circuit schematic diagram of the heating control module;
[0014] Figure 3 This is the circuit schematic of the current acquisition module. Detailed Implementation
[0015] like Figures 1 to 3 As shown, in this embodiment, the present invention includes a heating unit 1, a control unit 2, and a temperature acquisition unit 3. The control unit 2 includes a processor 21 and a heating control module connected by electrical signals. The temperature acquisition unit 3 acquires the temperature data of the heating unit 1 and is connected by electrical signals to the processor 21. The heating control module includes a dual-channel control module 22, a controllable power output module 23, a controllable constant current source module 24, and a current acquisition module 25. One output of the dual-channel control module 22 is connected to the controllable power output module 23, and the other output of the dual-channel control module 22 is connected to the controllable constant current source module 24. The output of the controllable power output module 23 is connected to the controllable constant current source module 24, and the controllable constant current source module 24 is electrically connected to the heating unit 1.
[0016] In this embodiment, the dual-channel control module 22 includes a digital-to-analog converter U1102 (model AD5667RBRMZ-1REEL7). The SCL and SDA ports of the digital-to-analog converter U1102 communicate with the processor 21 via an I2C bus. The VOUTA port of the digital-to-analog converter U1102 is connected to the VSENSE port of the step-down transformer U800 of the controllable power output module 23, thereby outputting a control voltage to the step-down transformer U800. The VOUTB port of the digital-to-analog converter U1102 is connected to the positive input terminal of the error amplifier U902 of the controllable constant current source module 24, thereby controlling the output voltage of the error amplifier U902 to control the current in the heating unit 1 circuit. This dual-channel control achieves rapid temperature regulation of the heating unit 1.
[0017] In this embodiment, the controllable power output module 23 includes a step-down transformer U800 of model TPS5430DDA. The input terminal of the step-down transformer U800 is connected to a 24V power supply, and the output terminal of the step-down transformer U800 is electrically connected to the heating unit 1 through the input terminal of the connection terminal J900, thereby providing the heating unit 1 with the voltage required for operation.
[0018] In this embodiment, the controllable constant current source module 24 includes an error amplifier U902 (model OPA188AIDBVR), a field-effect transistor Q901 (model IRF1018ESTRLPBF), a feedback resistor RY900, and a first operational amplifier U903 (model INA826AIDGKR). The field-effect transistor Q901 and the feedback resistor RY900 are connected in series between the output terminal of the connection terminal J900 and the ground line. A pair of input terminals of the first operational amplifier U903 are connected in parallel across the two ends of the feedback resistor RY900. The output terminal of the first operational amplifier U903 is connected to the negative input terminal of the error amplifier U902. The positive input terminal of the error amplifier U902 is connected to the dual-channel control module 22. The output terminal of the error amplifier U902 is connected to the gate of the field-effect transistor Q901. The voltage across the feedback resistor RY900 is acquired by the first operational amplifier U903, thereby obtaining the current magnitude in the electrical circuit of the heating unit 1. During operation, the controllable constant current source module 24 operates the field-effect transistor Q901 in the ohmic region, and the gate-source potential V of the field-effect transistor Q901 is adjusted by the error amplifier U902. gs This achieves constant current source control. The gate voltage V of the field-effect transistor Q901 is set. ds When sufficiently large, the output voltage V of the digital-to-analog converter U1102 SETB Because the voltage V at the negative input terminal of the error amplifier U902 P (Initial default state voltage is 0V) Less than V SETB This causes the output voltage V of the error amplifier U902 to... OP_OUT Increase, that is, the V of the field-effect transistor Q901 gs The load current I rises, thus causing the load current I to rise. DS The voltage increases, and then the current feedback voltage V output by the first operational amplifier U903 rises. curr The error amplifier U902 output voltage V increases. OP_OUT The decrease causes the V of the field-effect transistor Q901 to... gs A decrease, thereby causing I DS The current decreases. At this point, the entire current feedback loop is formed, achieving the set constant current. Simultaneously, to reduce the excessive power consumption and overheating of the MOSFET Q901 during current adjustment, the output voltage is controlled by the controllable power output module 23, thereby reducing the voltage drop V of the MOSFET Q901. ds The voltage is kept below 1V to ensure the stability of the overall system while allowing for rapid adjustment.
[0019] In this embodiment, the current acquisition module 25 includes a second operational amplifier U1000 and a first analog-to-digital converter U1001. The input terminal of the second operational amplifier U1000 is connected to the output terminal of the first operational amplifier U903, and the output terminal of the second operational amplifier U1000 is connected to the input terminal of the first analog-to-digital converter U1001. The output terminal of the first analog-to-digital converter U1001 is electrically connected to the processor 21. The second operational amplifier U1000 acquires the current feedback voltage V output by the first operational amplifier U903. curr The temperature is then converted by the first analog-to-digital converter U1001 and fed back to the processor 21 to monitor the temperature and make corresponding adjustments to the heating unit 1.
[0020] In this embodiment, the temperature acquisition unit 3 includes a sensor and a second analog-to-digital converter (ADC) of model ADS1220. The sensor is a T-type thermocouple. The sensor contacts the heating unit 1 and converts the temperature of the heating unit 1 into an electrical signal. The acquisition end of the second ADC is electrically connected to the sensor, and the communication end of the second ADC is electrically connected to the processor 21.
[0021] The working principle of this utility model:
[0022] The user sets the target temperature on the host computer. The processor 21 reads the temperature of the heating unit 1 through the temperature acquisition unit 3, and then the processor 21 controls the working current of the heating unit 1 through the heating control module. After approaching the target temperature, the processor 21 adjusts the controllable power output module 23 and the controllable constant current source module 24 according to the actual temperature of the temperature acquisition unit 3. When the temperature is higher than the target temperature, the constant power output current is reduced, and vice versa, the constant power output current is increased, thereby achieving rapid constant temperature control.
[0023] Although the embodiments of this utility model are described with reference to actual solutions, they do not constitute a limitation on the meaning of this utility model. For those skilled in the art, modifications to the implementation schemes and combinations with other schemes based on this specification are obvious.
Claims
1. A high-efficiency real-time constant temperature control and measuring device, comprising a heating unit (1) and a control unit (2), characterized in that: It also includes a temperature acquisition unit (3), the control unit (2) includes a processor (21) and a heating control module connected by electrical signals, the temperature acquisition unit (3) acquires the temperature data of the heating unit (1) and is connected by electrical signals to the processor (21), the heating control module includes a dual-channel control module (22), a controllable power output module (23), a controllable constant current source module (24) and a current acquisition module (25), one output of the dual-channel control module (22) is connected to the controllable power output module (23), the other output of the dual-channel control module (22) is connected to the controllable constant current source module (24), the output of the controllable power output module (23) is connected to the controllable constant current source module (24), and the controllable constant current source module (24) is electrically connected to the heating unit (1).
2. The high-efficiency real-time constant temperature control and measuring device according to claim 1, characterized in that: The dual-channel control module (22) includes a digital-to-analog converter (U1102), the communication port of which is connected to the processor (21), the VOUTA port of which is connected to the feedback port of the controllable power output module (23), and the VOUTB port of which is connected to the control port of the controllable constant current source module (24).
3. The high-efficiency real-time constant temperature control and measuring device according to claim 1, characterized in that: The controllable power output module (23) includes a step-down transformer (U800), the input terminal of which is connected to the power supply, and the output terminal of which is electrically connected to the heating unit (1) through the input terminal of the connection terminal (J900). The controllable constant current source module (24) is connected to the output terminal of the connection terminal (J900).
4. The high-efficiency real-time constant temperature control and measuring device according to claim 3, characterized in that: The controllable constant current source module (24) includes an error amplifier (U902), a field-effect transistor (Q901), a feedback resistor (RY900), and a first operational amplifier (U903). The field-effect transistor (Q901) and the feedback resistor (RY900) are connected in series between the output terminal of the connection terminal (J900) and the ground. A pair of input terminals of the first operational amplifier (U903) are connected in parallel to the two ends of the feedback resistor (RY900). The output terminal of the first operational amplifier (U903) is connected to the negative input terminal of the error amplifier (U902). The positive input terminal of the error amplifier (U902) is connected to the dual-channel control module (22). The output terminal of the error amplifier (U902) is connected to the gate of the field-effect transistor (Q901).
5. The high-efficiency real-time constant temperature control and measuring device according to claim 4, characterized in that: The current acquisition module (25) includes a second operational amplifier (U1000) and a first analog-to-digital converter (U1001). The input terminal of the second operational amplifier (U1000) is connected to the output terminal of the first operational amplifier (U903), the output terminal of the second operational amplifier (U1000) is connected to the input terminal of the first analog-to-digital converter (U1001), and the output terminal of the first analog-to-digital converter (U1001) is electrically connected to the processor (21).
6. The high-efficiency real-time constant temperature control and measuring device according to claim 1, characterized in that: The temperature acquisition unit (3) includes a sensor and a second analog-to-digital converter. The sensor works in conjunction with the heating unit (1). The acquisition end of the second analog-to-digital converter is electrically connected to the sensor, and the communication end of the second analog-to-digital converter is electrically connected to the processor (21).