Cooling fan motor function test fixture

Abstract

The invention relates to the technical field of cooling fans, in particular to a cooling fan motor function test fixture, which comprises a current detection module, a temperature detection module, a controller and a fault judgment module, the current detection module detects the current of the power supply input end of the cooling fan motor and outputs a current electric signal corresponding to the current to the controller; the temperature detection module detects the temperature of the cooling fan motor, converts the temperature into a corresponding temperature electric signal and outputs the temperature electric signal to the controller; the controller outputs a first judgment signal to the fault judgment module when a current value corresponding to the current electric signal is greater than a preset current threshold value and a voltage value corresponding to the temperature electric signal is greater than a preset temperature voltage threshold value; when receiving the first judgment signal, the fault judgment module judges that the cooling fan motor is in an overload fault, so that the motor fault is found and processed in time, and the safety and the stability of equipment are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling fans, and in particular to a cooling fan motor function test fixture. Background Art

[0002] As the performance of electronic equipment continues to improve, the demand for heat dissipation is increasing. As a key heat dissipation component, cooling fans are widely used in computers, home appliances and industrial equipment. The core component of the cooling fan is the motor, and its operating status is directly related to the heat dissipation effect and service life of the equipment. Therefore, it is very important to ensure the normal operation of the cooling fan motor.

[0003] Traditional cooling fan motor function test fixtures mainly judge the performance of the motor through simple mechanical and electrical parameters such as speed, starting torque, etc. However, with the complexity of the motor's use environment and application scenarios, relying solely on these traditional test methods is no longer sufficient to fully diagnose the motor's operating status. In particular, the motor's current and temperature are important indicators to measure its working status. Current fluctuations may reflect motor overload, stall and other faults, while abnormal temperature may indicate poor heat dissipation or aging of internal components. However, existing test fixtures are usually unable to monitor and comprehensively analyze these current and temperature parameters in real time, making it difficult to accurately judge the potential faults of the motor.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide a cooling fan motor function test fixture, which aims to solve the technical problem that the existing cooling fan motor function test fixture cannot determine the motor fault based on the motor current and temperature.

[0006] To achieve the above object, the present invention provides a cooling fan motor function test fixture, the fixture comprising: a current detection module, a temperature detection module, a controller and a fault judgment module;

[0007] Wherein, the current detection module and the temperature detection module are respectively connected to the controller, and the controller is connected to the fault determination module;

[0008] The current detection module is used to detect the current at the power input end of the cooling fan motor and output a current electrical signal corresponding to the current magnitude to the controller;

[0009] The temperature detection module is used to detect the temperature of the cooling fan motor and convert the temperature into a corresponding temperature electrical signal and output it to the controller;

[0010] The controller is used to output a first determination signal to the fault determination module when the current value corresponding to the current electrical signal is greater than a preset current threshold and the voltage value corresponding to the temperature electrical signal is greater than a preset temperature voltage threshold;

[0011] The fault determination module is used to determine that the cooling fan motor is in an overload fault when receiving the first determination signal.

[0012] Furthermore, the controller is further configured to output a second determination signal to the fault determination module when the current value corresponding to the current electrical signal is within a preset current threshold range and the voltage value corresponding to the temperature electrical signal is greater than a preset temperature voltage threshold;

[0013] The fault determination module is further configured to determine, upon receiving the second determination signal, that the cooling fan motor has a fault of insufficient heat dissipation.

[0014] Further, the fault determination module includes: a first switch module, a second switch module, a first state indication module and a second state indication module;

[0015] Wherein, the first switch module is connected to the controller, the power supply and the first state indication module respectively, and the second switch module is connected to the controller, the power supply and the second state indication module respectively;

[0016] The first switch module is used to conduct the power supply connection between the power supply and the first state indication module when receiving the first determination signal;

[0017] The first state indication module is used to indicate the overload fault of the cooling fan motor when the power supply connection is turned on, and determine that the cooling fan motor is overloaded;

[0018] The second switch module is used to conduct the power supply connection between the power supply and the second state indication module when receiving the second determination signal;

[0019] The second state indication module is used to indicate the insufficient heat dissipation fault of the cooling fan motor when the power supply connection is turned on, and determine that the cooling fan motor has an insufficient heat dissipation fault.

[0020] Furthermore, the cooling fan motor function test fixture further includes: a wireless communication module;

[0021] The wireless communication module is connected to the controller and the terminal device respectively;

[0022] The controller is further used to output corresponding temperature and current display signals to the wireless communication module according to the current value corresponding to the current electrical signal and the voltage value corresponding to the temperature electrical signal;

[0023] The wireless communication module is used to send the temperature and current display signals to the terminal device by wireless transmission when receiving the temperature and current display signals, so that the terminal device can display the current at the power input end of the cooling fan motor and the temperature of the cooling fan motor based on the temperature and current display signals.

[0024] Furthermore, the cooling fan motor function test fixture further comprises: an oscilloscope;

[0025] The oscilloscope is connected to the current detection module;

[0026] The current detection module is also used to output a current electrical signal corresponding to the current magnitude to the oscilloscope;

[0027] The oscilloscope is used to display the current waveform of the power input terminal of the thermal fan motor based on the current electrical signal.

[0028] Furthermore, the cooling fan motor function test fixture further includes: a voltage dividing module and a voltage stabilizing module;

[0029] Wherein, the voltage dividing module is connected to the power supply and the voltage stabilizing module respectively, and the voltage stabilizing module is connected to the temperature detection module;

[0030] The voltage dividing module is used to divide the power supply voltage provided by the power supply to obtain a divided voltage, and send the divided voltage to the voltage stabilizing module;

[0031] The voltage stabilization module is used to stabilize the divided voltage and send the stabilized divided voltage to the temperature detection module;

[0032] The temperature detection module is also used to adjust the divided voltage after stabilization to obtain the temperature electrical signal.

[0033] Further, the first switch module includes: a first resistor and a first switch tube, and the second switch module includes: a second resistor and a second switch tube;

[0034] Among them, the first end of the first resistor is connected to the power supply, the second end of the first resistor is connected to the input end of the first switch tube, the control end of the first switch tube is connected to the controller, the output end of the first switch tube is connected to the first state indication module, the first end of the second resistor is connected to the power supply, the second end of the second resistor is connected to the input end of the second switch tube, the control end of the second switch tube is connected to the controller, and the output end of the second switch tube is connected to the second state indication module.

[0035] Further, the first state indication module includes: a first light emitting diode, and the second state indication module includes: a second light emitting diode;

[0036] Among them, the anode of the first light-emitting diode is connected to the output end of the first switch tube, the cathode of the first light-emitting diode is grounded, the anode of the second light-emitting diode is connected to the output end of the second switch tube, and the cathode of the second light-emitting diode is grounded.

[0037] Further, the temperature detection module includes: a third resistor, the third resistor is a thermistor;

[0038] Wherein, a first end of the third resistor is connected to the power supply through the voltage stabilizing module and the voltage dividing module, and a second end of the third resistor is connected to the controller.

[0039] Further, the voltage dividing module includes: a fourth resistor and a fifth resistor, and the voltage stabilizing module includes: a first capacitor;

[0040] Among them, the first end of the fourth resistor is connected to the power supply, the second end of the fourth resistor is connected to the first end of the fifth resistor, the first end of the fifth resistor is also connected to the first end of the third resistor and the first end of the first capacitor, and the second end of the fifth resistor and the second end of the first capacitor are grounded.

[0041] The present invention provides a cooling fan motor function test fixture, the fixture comprising: a current detection module, a temperature detection module, a controller and a fault judgment module; wherein the current detection module and the temperature detection module are respectively connected to the controller, and the controller is connected to the fault judgment module; the current detection module is used to detect the current at the power input end of the cooling fan motor, and output a current electrical signal corresponding to the current magnitude to the controller; the temperature detection module is used to detect the temperature of the cooling fan motor, and convert the temperature into a corresponding temperature electrical signal and output it to the controller; the controller is used to output a first judgment signal to the fault judgment module when the current value corresponding to the current electrical signal is greater than a preset current threshold and the voltage value corresponding to the temperature electrical signal is greater than a preset temperature voltage threshold; the fault judgment module is used to determine that the cooling fan motor is an overload fault when receiving the first judgment signal. Through the coordinated work of the above modules, the fixture can realize accurate monitoring of the cooling fan motor, timely discover and handle motor faults, and ensure the safety and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of an embodiment of a heat dissipation fan motor function test fixture of the present invention;

[0043] Figure 2 It is a structural schematic diagram of another embodiment of the cooling fan motor function test fixture of the present invention;

[0044] Figure 3 It is a circuit schematic diagram of the cooling fan motor function test fixture of the present invention.

[0045] Description of Figure Numbers:

[0046]

[0047] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0049] Reference Figures 1 to 3 , the present invention proposes a cooling fan motor function test fixture, the fixture comprising: a current detection module 10, a temperature detection module 20, a controller 30 and a fault determination module 40;

[0050] The current detection module 10 and the temperature detection module 20 are respectively connected to the controller 30, and the controller 30 is connected to the fault determination module 40;

[0051] The current detection module 10 is used to detect the current at the power input end of the cooling fan motor and output a current electrical signal corresponding to the current magnitude to the controller 30;

[0052] The temperature detection module 20 is used to detect the temperature of the cooling fan motor and convert the temperature into a corresponding temperature electrical signal and output it to the controller 30;

[0053] The controller 30 is used to output a first determination signal to the fault determination module 40 when the current value corresponding to the current electrical signal is greater than a preset current threshold and the voltage value corresponding to the temperature electrical signal is greater than a preset temperature voltage threshold;

[0054] The fault determination module 40 is used to determine that the cooling fan motor is in an overload fault when receiving the first determination signal.

[0055] It should be noted that the main function of the current detection module 10 is to monitor the current at the power input end of the cooling fan motor. Current sensors or Hall sensors are usually used to sense the current value. When the motor current exceeds the normal working range (for example, overload or stall, etc.), the module will convert the detected current into a current electrical signal and send it to the controller 30. The magnitude of the current electrical signal corresponds to the actual detected current value, ensuring that the controller 30 can obtain accurate current information. The temperature detection module 20 is used to monitor the temperature of the cooling fan motor in real time. Typical temperature detection devices include thermistors, thermocouples, etc. When the motor is working, if the temperature rises above the safety threshold (for example, poor heat dissipation, abnormal heating inside the motor), the temperature detection module 20 will convert the temperature into a temperature electrical signal and send it to the controller 30. The temperature signal is usually transmitted in the form of voltage, and the voltage value is proportional to the actual temperature value. The controller 30 is the core control unit of the test fixture, which is responsible for receiving signals from the current detection module 10 and the temperature detection module 20. The controller 30 is provided with preset current and temperature thresholds. When the current value corresponding to the received current electrical signal exceeds the preset current threshold, and the voltage value corresponding to the temperature electrical signal exceeds the preset temperature voltage threshold, the controller 30 will output a first determination signal. This signal will be used to further trigger the fault determination module 40 to perform fault determination. The main function of the controller 30 is to comprehensively analyze the input signal to ensure the accuracy of the determination conditions. The fault determination module 40 is a module for finally determining the motor fault. It receives the first determination signal from the controller 30 to confirm and determine the fault. When the controller 30 detects that both the current and the temperature exceed the set threshold, the fault determination module 40 will determine that the cooling fan motor is in an overload fault state according to the first determination signal. The fault determination module 40 can also be connected to an alarm system or an automatic shutdown system so as to respond in time when a fault occurs to avoid further damage to the motor or other equipment. Through the collaborative work of the above modules, the fixture can realize accurate monitoring of the cooling fan motor, timely detect and handle motor faults, and ensure the safety and stability of the equipment.

[0056] Furthermore, the controller 30 is further configured to output a second determination signal to the fault determination module 40 when the current value corresponding to the current electrical signal is within a preset current threshold range and the voltage value corresponding to the temperature electrical signal is greater than a preset temperature voltage threshold;

[0057] The fault determination module 40 is further configured to determine that the cooling fan motor has a heat dissipation insufficient fault upon receiving the second determination signal.

[0058] It should be noted that the current detection module 10 has the same function as the original one. The module is used to detect the current at the power input end of the cooling fan motor, and convert the actual sensed current value into a current electrical signal and send it to the controller 30. The temperature detection module 20 also has the same function as the original one. The module is responsible for detecting the temperature of the motor, converting it into a temperature electrical signal and sending it to the controller 30. In addition to the functions mentioned above, the controller 30 also has a more sophisticated logic: if the current value corresponding to the current electrical signal is greater than the preset current threshold, and the voltage value corresponding to the temperature electrical signal is greater than the preset temperature voltage threshold, the controller 30 will output a first judgment signal to the fault judgment module 40, which indicates that the motor may have an overload fault. If the current value corresponding to the current electrical signal is within the preset current threshold range, and the voltage value corresponding to the temperature electrical signal is greater than the preset temperature voltage threshold, it means that the motor current is within the normal range but the temperature is abnormally high. The controller 30 will output a second judgment signal to the fault judgment module 40, which indicates that the motor may have an insufficient heat dissipation fault. In addition to determining the overload fault, the fault judgment module 40 also needs to process and judge the insufficient heat dissipation fault:

[0059] When the first judgment signal is received, the fault judgment module 40 will determine that the motor is in an overload fault state. At this time, emergency shutdown or alarm measures may need to be taken to protect the equipment. When the second judgment signal is received, the fault judgment module 40 will determine that the motor has an insufficient heat dissipation fault. At this time, it usually means that although the operating current of the motor is normal, the temperature rises abnormally due to poor heat dissipation. It is necessary to check the heat dissipation system or clean up the heat dissipation path to prevent further damage. By adding these functions, the test fixture can not only detect the overload fault of the motor, but also identify the insufficient heat dissipation fault, thereby providing a more comprehensive fault monitoring and early warning mechanism. This multi-level fault monitoring capability helps to improve the reliability and safety of the system.

[0060] Further, the fault determination module 40 includes: a first switch module 401, a second switch module 403, a first state indication module 402 and a second state indication module 404;

[0061] The first switch module 401 is connected to the controller 30, the power supply and the first state indication module 402 respectively, and the second switch module 403 is connected to the controller 30, the power supply and the second state indication module 404 respectively;

[0062] The first switch module 401 is used to conduct the power supply connection between the power supply and the first state indication module 402 when receiving the first determination signal;

[0063] The first state indication module 402 is used to indicate the overload fault of the cooling fan motor when the power supply connection is turned on, and determine that the cooling fan motor is overloaded;

[0064] The second switch module 403 is used to conduct the power supply connection between the power supply and the second state indication module 404 when receiving the second determination signal;

[0065] The second state indication module 404 is used to indicate the insufficient heat dissipation fault of the cooling fan motor when the power supply connection is turned on, and determine that the cooling fan motor has an insufficient heat dissipation fault.

[0066] It should be noted that the fault determination module 40 is further subdivided into the following submodules: the first switch module 401 connects the controller 30, the power supply and the first state indication module 402; upon receiving the first determination signal, the power supply connection between the power supply and the first state indication module 402 is turned on. The second switch module 403 connects the controller 30, the power supply and the second state indication module 404; upon receiving the second determination signal, the power supply connection between the power supply and the second state indication module 404 is turned on. The first state indication module 402 is used to indicate the overload fault of the cooling fan motor after the first switch module 401 turns on the power connection. The indication method can be that the indicator light is on, the alarm sounds, or the overload fault information is displayed on the display screen. The second state indication module 404 is used to indicate the insufficient heat dissipation fault of the cooling fan motor after the second switch module 403 turns on the power connection. The indication method can also be an indicator light, an alarm, or a display screen.

[0067] Specifically, the current detection module 10 detects that the motor current exceeds the standard, and the temperature detection module 20 detects that the temperature rise is too high. The data of the two modules are transmitted to the controller 30, and the controller 30 outputs a first determination signal after confirming the overload condition. After receiving the first determination signal, the first switch module 401 turns on the power supply connection between the power supply and the first state indication module 402. The first state indication module 402 is activated, and the corresponding fault indication (such as indicator light, alarm, etc.) is activated to notify the maintenance personnel that the motor has an overload fault.

[0068] The current detection module 10 detects that the motor current is normal, and the temperature detection module 20 detects that the temperature rise is too high. The data is transmitted to the controller 30, and the controller 30 outputs a second judgment signal after confirming that the heat dissipation is insufficient. After receiving the second judgment signal, the second switch module 403 turns on the power supply connection between the power supply and the second state indication module 404. The second state indication module 404 is activated, and the corresponding fault indication (such as indicator light, alarm, etc.) is started to notify the maintenance personnel that the motor has an insufficient heat dissipation fault. Through the above structure and process, the test fixture can effectively distinguish and indicate different fault types of the cooling fan motor, and provide timely and accurate fault information so that corresponding maintenance measures can be taken.

[0069] Furthermore, the cooling fan motor function test fixture further includes: a wireless communication module 50;

[0070] The wireless communication module 50 is connected to the controller 30 and the terminal device respectively;

[0071] The controller 30 is further used to output corresponding temperature and current display signals to the wireless communication module 50 according to the current value corresponding to the current electrical signal and the voltage value corresponding to the temperature electrical signal;

[0072] The wireless communication module 50 is used to send the temperature and current display signals to the terminal device by wireless transmission when receiving the temperature and current display signals, so that the terminal device can display the current at the power input end of the cooling fan motor and the temperature of the cooling fan motor based on the temperature and current display signals.

[0073] It should be noted that the wireless communication module 50 is used to wirelessly transmit the temperature and current display signals generated by the controller 30 to the terminal device: receiving the temperature and current display signals from the controller 30. Sending these signals to the terminal device through wireless communication. The terminal device receives and displays the current and temperature data for remote monitoring and management: displaying real-time current and temperature data. Providing an alarm or notification function so as to promptly remind the user when a fault occurs.

[0074] Specifically, data acquisition and signal transmission: the current detection module 10 and the temperature detection module 20 respectively collect the current and temperature data of the cooling fan motor and generate corresponding current electrical signals and temperature electrical signals. These signals are transmitted to the controller 30. Data processing and judgment: the controller 30 processes the received signal: if both the current and the temperature exceed the preset threshold, a first judgment signal is output to indicate an overload fault. If the current is within the normal range but the temperature is too high, a second judgment signal is output to indicate an insufficient heat dissipation fault. The controller 30 also converts the processed temperature and current data into a display signal. Fault indication: after the first switch module 401 receives the first judgment signal, it turns on the power supply and the first state indication module 402 to indicate an overload fault. After the second switch module 403 receives the second judgment signal, it turns on the power supply and the second state indication module 404 to indicate an insufficient heat dissipation fault. Wireless transmission and remote display: the wireless communication module 50 receives the temperature and current display signals sent by the controller 30 and transmits them to the terminal device wirelessly. After receiving these signals, the terminal device displays the current current and temperature data of the cooling fan motor. By introducing the wireless communication module 50, the system can realize remote real-time monitoring, and the management personnel can check the working status of the cooling fan motor anytime and anywhere. This method not only improves the convenience of the system, but also enhances the fault response speed, which helps to take effective measures as soon as the fault occurs, ensuring the safety and stable operation of the equipment.

[0075] Furthermore, the cooling fan motor function test fixture further includes: an oscilloscope 60;

[0076] The oscilloscope 60 is connected to the current detection module 10;

[0077] The current detection module 10 is also used to output a current electrical signal corresponding to the current magnitude to the oscilloscope 60;

[0078] The oscilloscope 60 is used to display the current waveform of the power input terminal of the thermal fan motor based on the current electrical signal.

[0079] It should be noted that the oscilloscope 60 receives and displays the current waveform, and the user can observe the real-time changes of the current and conduct detailed analysis. The overall system further enhances the monitoring and analysis capabilities of the cooling fan motor operating status through the introduction of the oscilloscope 60, providing stronger support for timely troubleshooting and maintenance.

[0080] Furthermore, the cooling fan motor function test fixture further includes: a voltage dividing module 70 and a voltage stabilizing module 80;

[0081] The voltage dividing module 70 is connected to the power supply and the voltage stabilizing module 80 respectively, and the voltage stabilizing module 80 is connected to the temperature detecting module 20;

[0082] The voltage dividing module 70 is used to divide the power supply voltage provided by the power supply to obtain a divided voltage, and send the divided voltage to the voltage stabilizing module 80;

[0083] The voltage stabilization module 80 is used to stabilize the divided voltage and send the stabilized divided voltage to the temperature detection module 20;

[0084] The temperature detection module 20 is also used to adjust the divided voltage after stabilization to obtain the temperature electrical signal.

[0085] It should be noted that the main function of the voltage divider module 70 is to divide the higher voltage provided by the power supply into a suitable lower voltage to ensure that the subsequent modules (such as the voltage stabilizing module 80 and the temperature detection module 20) can work normally. Voltage division: The voltage of the power supply may be high, and directly providing it to the temperature detection module 20 may cause damage to it or inaccurate measurement. The voltage divider module 70 reduces the high voltage to a suitable voltage division range through methods such as resistance voltage division. Protect subsequent modules: By reducing the voltage, the voltage divider module 70 plays a role in protecting the voltage stabilizing module 80 and the temperature detection module 20 to prevent them from being damaged due to excessive input voltage. Stable input: The output divided voltage of the voltage divider module 70 will be used as the input of the voltage stabilizing module 80. It is necessary to ensure that the voltage after voltage division is relatively stable to facilitate subsequent voltage stabilization processing.

[0086] The main function of the voltage stabilization module 80 is to stabilize the divided voltage output by the voltage divider module 70, and provide a stable voltage to the temperature detection module 20 to ensure that it works in a stable voltage environment, thereby improving the accuracy of temperature measurement. Voltage stabilization: The voltage stabilization module 80 stabilizes the input divided voltage to keep the output voltage constant, thereby avoiding unstable operation of the temperature detection module 20 due to power supply voltage fluctuations. Accurate power supply: Provides accurate working voltage to the temperature detection module 20, so that it can accurately detect and convert temperature signals, and avoids interference with measurement results caused by unstable power supply. Noise elimination: The voltage stabilization module 80 usually has a certain filtering function, which can eliminate high-frequency noise in the input voltage and improve the purity of the power supply, thereby further improving the accuracy of temperature detection.

[0087] Furthermore, the first switch module 401 includes: a first resistor R1 and a first switch tube Q1, and the second switch module 403 includes: a second resistor R2 and a second switch tube Q2;

[0088] Among them, the first end of the first resistor R1 is connected to the power supply, the second end of the first resistor R1 is connected to the input end of the first switch tube Q1, the control end of the first switch tube Q1 is connected to the controller 30, the output end of the first switch tube Q1 is connected to the first state indication module 402, the first end of the second resistor R2 is connected to the power supply, the second end of the second resistor R2 is connected to the input end of the second switch tube Q2, the control end of the second switch tube Q2 is connected to the controller 30, and the output end of the second switch tube Q2 is connected to the second state indication module 404.

[0089] It should be noted that the second state indication module 404 is connected. In the system, the first switch module 401 and the second switch module 403 are used to indicate the fault type (overload or insufficient heat dissipation) of the cooling fan motor. By introducing resistors and switch tubes, the control of the power supply can be realized, and then the state indication module is driven. When the cooling fan motor works normally, the controller 30 does not output a signal, the first and second switch tubes Q2 are both in the cut-off state, and the state indication module is not lit. When an overload fault occurs, the controller 30 outputs a signal to the control end of the first switch tube Q1, the first switch tube Q1 is turned on, and the first state indication module 402 is lit, indicating an overload fault. When an insufficient heat dissipation fault occurs, the controller 30 outputs a signal to the control end of the second switch tube Q2, the second switch tube Q2 is turned on, and the second state indication module 404 is lit, indicating an insufficient heat dissipation fault. By introducing resistors and switch tubes, the first switch module 401 and the second switch module 403 achieve effective indication of the fault type, which provides a guarantee for the stable operation and timely fault handling of the system.

[0090] Further, the first state indicating module 402 includes: a first light emitting diode D1, and the second state indicating module 404 includes: a second light emitting diode D2;

[0091] The anode of the first light emitting diode D1 is connected to the output end of the first switch tube Q1, the cathode of the first light emitting diode D1 is grounded, the anode of the second light emitting diode D2 is connected to the output end of the second switch tube Q2, and the cathode of the second light emitting diode D2 is grounded.

[0092] It should be noted that in the system design, the first state indication module 402 and the second state indication module 404 include light-emitting diodes for indicating overload faults and insufficient heat dissipation faults, respectively. The first light-emitting diode D1 and the second light-emitting diode D2 are introduced as the state indication module, and the control of the first switch tube Q1 and the second switch tube Q2 is used to achieve clear indication of system overload and insufficient heat dissipation faults. The switch tube is turned on or off by the signal of the controller 30, so that the light-emitting diodes light up respectively, and the fault state is intuitively displayed. This design is simple and efficient, has the advantages of high reliability and low power consumption, and is very suitable for a variety of application scenarios that require real-time monitoring and fault indication.

[0093] Further, the temperature detection module 20 includes: a third resistor R3, the third resistor R3 is a thermistor;

[0094] The first end of the third resistor R3 is connected to the power supply through the voltage stabilizing module 80 and the voltage dividing module 70 , and the second end of the third resistor R3 is connected to the controller 30 .

[0095] It should be noted that the voltage of the power supply is partially reduced by the voltage divider module 70 to meet the needs of the subsequent circuit. The voltage after the voltage division enters the voltage stabilization module 80, and is further stabilized into a constant voltage to ensure that the power supply voltage is stable. After the voltage stabilization and voltage divider module 70 provide a stable voltage, the voltage is connected to the first end of the thermistor (the third resistor R3). The resistance of the thermistor changes with temperature, causing the voltage across the resistor to change accordingly. The voltage change is transmitted to the second end of the thermistor, and this end is connected to the controller 30. The controller 30 receives the voltage signal from the thermistor and calculates the current temperature based on the voltage. Combined with the detected temperature data, the controller 30 can further execute the corresponding control logic, such as adjusting the fan speed or triggering the fault indication module. By using thermistors and matching power supply processing design for the temperature detection module 20, high-precision and high-reliability temperature monitoring can be achieved, effectively protecting and optimizing system operation.

[0096] Further, the voltage dividing module 70 includes: a fourth resistor R4 and a fifth resistor R5, and the voltage stabilizing module 80 includes: a first capacitor C1;

[0097] Among them, the first end of the fourth resistor R4 is connected to the power supply, the second end of the fourth resistor R4 is connected to the first end of the fifth resistor R5, the first end of the fifth resistor R5 is also connected to the first end of the third resistor R3 and the first end of the first capacitor C1, and the second end of the fifth resistor R5 and the second end of the first capacitor C1 are grounded.

[0098] It should be noted that by introducing the voltage divider module 70 and the voltage stabilizing module 80, using the fourth and fifth resistors R5 for voltage division, and using the first capacitor C1 for voltage stabilization, a stable voltage input is finally provided to the third resistor R3 (thermistor), and the accuracy and reliability of the temperature detection module 20 are improved. The above design is not only simple in structure, but also has superior performance, and is suitable for a wide range of temperature monitoring and control application scenarios.

[0099] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0100] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cooling fan motor function test fixture, characterized in that: include: Current detection module, temperature detection module, controller and fault determination module; Wherein, the current detection module and the temperature detection module are respectively connected to the controller, and the controller is connected to the fault determination module; The current detection module is used to detect the current at the power input end of the cooling fan motor and output a current electrical signal corresponding to the current magnitude to the controller; The temperature detection module is used to detect the temperature of the cooling fan motor and convert the temperature into a corresponding temperature electrical signal and output it to the controller; The controller is used to output a first determination signal to the fault determination module when the current value corresponding to the current electrical signal is greater than a preset current threshold and the voltage value corresponding to the temperature electrical signal is greater than a preset temperature voltage threshold; The fault determination module is used to determine that the cooling fan motor is in an overload fault when receiving the first determination signal.

2. The cooling fan motor function test fixture as claimed in claim 1, characterized in that: The controller is further configured to output a second determination signal to the fault determination module when the current value corresponding to the current electrical signal is within a preset current threshold range and the voltage value corresponding to the temperature electrical signal is greater than a preset temperature voltage threshold; The fault determination module is further configured to determine, upon receiving the second determination signal, that the cooling fan motor has a fault of insufficient heat dissipation.

3. The cooling fan motor function test fixture as claimed in claim 2, characterized in that: The fault determination module includes: a first switch module, a second switch module, a first state indication module and a second state indication module; Wherein, the first switch module is connected to the controller, the power supply and the first state indication module respectively, and the second switch module is connected to the controller, the power supply and the second state indication module respectively; The first switch module is used to conduct the power supply connection between the power supply and the first state indication module when receiving the first determination signal; The first state indication module is used to indicate the overload fault of the cooling fan motor when the power supply connection is turned on, and determine that the cooling fan motor is overloaded; The second switch module is used to conduct the power supply connection between the power supply and the second state indication module when receiving the second determination signal; The second state indication module is used to indicate the insufficient heat dissipation fault of the cooling fan motor when the power supply connection is turned on, and determine that the cooling fan motor has an insufficient heat dissipation fault.

4. The cooling fan motor function test fixture as claimed in claim 3, characterized in that: The cooling fan motor function test fixture further includes: a wireless communication module; The wireless communication module is connected to the controller and the terminal device respectively; The controller is further used to output corresponding temperature and current display signals to the wireless communication module according to the current value corresponding to the current electrical signal and the voltage value corresponding to the temperature electrical signal; The wireless communication module is used to send the temperature and current display signals to the terminal device by wireless transmission when receiving the temperature and current display signals, so that the terminal device can display the current at the power input end of the cooling fan motor and the temperature of the cooling fan motor based on the temperature and current display signals.

5. The cooling fan motor function test fixture as claimed in claim 4, characterized in that: The cooling fan motor function test fixture further includes: an oscilloscope; The oscilloscope is connected to the current detection module; The current detection module is also used to output a current electrical signal corresponding to the current magnitude to the oscilloscope; The oscilloscope is used to display the current waveform of the power input terminal of the thermal fan motor based on the current electrical signal.

6. The cooling fan motor function test fixture as claimed in claim 5, characterized in that: The cooling fan motor function test fixture further includes: a voltage dividing module and a voltage stabilizing module; Wherein, the voltage dividing module is connected to the power supply and the voltage stabilizing module respectively, and the voltage stabilizing module is connected to the temperature detection module; The voltage dividing module is used to divide the power supply voltage provided by the power supply to obtain a divided voltage, and send the divided voltage to the voltage stabilizing module; The voltage stabilization module is used to stabilize the divided voltage and send the stabilized divided voltage to the temperature detection module; The temperature detection module is also used to adjust the divided voltage after stabilization to obtain the temperature electrical signal.

7. The cooling fan motor function test fixture as claimed in claim 3, characterized in that: The first switch module includes: a first resistor and a first switch tube, and the second switch module includes: a second resistor and a second switch tube; Among them, the first end of the first resistor is connected to the power supply, the second end of the first resistor is connected to the input end of the first switch tube, the control end of the first switch tube is connected to the controller, the output end of the first switch tube is connected to the first state indication module, the first end of the second resistor is connected to the power supply, the second end of the second resistor is connected to the input end of the second switch tube, the control end of the second switch tube is connected to the controller, and the output end of the second switch tube is connected to the second state indication module.

8. The cooling fan motor function test fixture as claimed in claim 7, characterized in that: The first state indication module includes: a first light emitting diode, and the second state indication module includes: a second light emitting diode; Among them, the anode of the first light-emitting diode is connected to the output end of the first switch tube, the cathode of the first light-emitting diode is grounded, the anode of the second light-emitting diode is connected to the output end of the second switch tube, and the cathode of the second light-emitting diode is grounded.

9. The cooling fan motor function test fixture as claimed in claim 6, characterized in that: The temperature detection module includes: a third resistor, which is a thermistor; Wherein, a first end of the third resistor is connected to the power supply through the voltage stabilizing module and the voltage dividing module, and a second end of the third resistor is connected to the controller.

10. The cooling fan motor function test fixture as claimed in claim 9, characterized in that: The voltage dividing module includes: a fourth resistor and a fifth resistor, and the voltage stabilizing module includes: a first capacitor; Among them, the first end of the fourth resistor is connected to the power supply, the second end of the fourth resistor is connected to the first end of the fifth resistor, the first end of the fifth resistor is also connected to the first end of the third resistor and the first end of the first capacitor, and the second end of the fifth resistor and the second end of the first capacitor are grounded.

Images