Power supply circuit capable of checking flow of air pump

Abstract

The utility model relates to the technical field of air pumps, and discloses a power supply circuit capable of checking the flow of an air pump, which comprises external equipment, a programmable circuit, a DAC (Digital-to-Analog Converter) circuit, a voltage-adjustable voltage stabilizing circuit and a memory, the external equipment is in communication connection with the programmable circuit, the programmable circuit is in communication connection with the DAC circuit, the DAC circuit is electrically connected with the voltage-adjustable voltage stabilizing circuit, and the memory is electrically connected with the external equipment. The output voltage of the voltage-adjustable voltage stabilizing circuit serves as the power supply voltage of the air pump, and the programmable circuit is further in communication connection with the storage. When a worker tests that the flow output by the air pump is not within the range of technical requirements, the output voltage VDAC of the DAC circuit is increased or decreased through external equipment, then the output voltage of the voltage-adjustable voltage stabilizing circuit is adjusted and changed, the flow of the air pump meets the technical requirements, and verification parameters at the moment are stored in a storage. Therefore, the air pump leaving the factory is ensured to operate according to the verified parameters, the flow of the air pump is ensured to meet the technical requirements, and the product percent of pass is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air pumps, in particular to a power supply circuit capable of verifying the flow rate of an air pump. Background Art

[0002] For air pump applications that require air pumps to provide precise flow rates, such as electronic endoscopes that use air pumps to deliver air and water. In the prior art, air pumps are generally powered by a fixed voltage to provide a specific flow rate. Although the flow rate of the air pump can be determined by determining the power supply voltage, the poor consistency of air pumps on the market will cause the actual gas flow rate in the product to differ from the set value, resulting in errors in the corresponding product testing and even causing the product to fail to meet the standards. Utility Model Content

[0003] In view of this, the utility model provides a power supply circuit capable of calibrating the flow rate of an air pump to solve the above problems.

[0004] The utility model provides a power supply circuit capable of verifying the flow of an air pump, comprising: an external device, a programmable circuit, a DAC circuit, a voltage-adjustable voltage-stabilizing circuit and a memory, wherein:

[0005] The external device is communicatively connected to the programmable circuit, the programmable circuit is communicatively connected to the DAC circuit, the DAC circuit is electrically connected to the voltage-adjustable voltage-stabilizing circuit, the output voltage of the voltage-adjustable voltage-stabilizing circuit serves as the power supply voltage of the air pump, and the programmable circuit is also communicatively connected to the memory.

[0006] In an optional implementation, the external device is also communicatively connected to the memory.

[0007] In an optional implementation, the memory is a non-volatile memory.

[0008] In an optional implementation, the communication methods between the external device and the programmable circuit, between the programmable circuit and the DAC circuit, and between the external device and the memory include but are not limited to USB, UART, I2C, and SPI.

[0009] In an optional implementation, the voltage-adjustable voltage stabilizing circuit is a switching voltage stabilizing circuit or an adjustable LDO circuit.

[0010] In an optional implementation, the DAC circuit includes: a DAC chip and a seventh resistor, wherein:

[0011] The data line pin and the clock line pin of the DAC chip are connected to the programmable circuit, and the output pin of the DAC chip is connected to the voltage-adjustable voltage stabilizing circuit through the seventh resistor.

[0012] In an optional implementation, the voltage-adjustable voltage-stabilizing circuit includes: a voltage-stabilizing chip, a first capacitor, a second capacitor, a third capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, and an inductor, wherein:

[0013] The power input pin of the voltage stabilizing chip is respectively connected to an external power supply and one end of the third capacitor, and the other end of the third capacitor is grounded;

[0014] The enable pin of the voltage stabilizing chip is respectively connected to one end of the second resistor and one end of the third resistor, the other end of the second resistor is connected to the enable signal, and the other end of the third resistor is grounded;

[0015] The switch pin of the voltage stabilizing chip is respectively connected to one end of the first capacitor and one end of the inductor, the other end of the inductor is respectively connected to one end of the first resistor and one end of the second capacitor, the other end of the first resistor is connected to one end of the fourth resistor, the other end of the fourth resistor is grounded, one end of the second capacitor serves as the output end of the air pump power supply voltage, and the other end of the second capacitor is grounded;

[0016] The bootstrap pin of the voltage stabilizing chip is connected to the other end of the first capacitor;

[0017] The feedback pin of the voltage stabilizing chip is respectively connected to the other end of the first resistor and one end of the fourth resistor.

[0018] In an optional implementation, the external device is a visual programming device.

[0019] In an optional implementation, the programmable circuit is implemented by MCU or FPGA.

[0020] The utility model provides a power supply circuit capable of verifying the flow of an air pump, comprising: an external device, a programmable circuit, a DAC circuit, a voltage-adjustable voltage-stabilizing circuit and a memory, wherein the external device is connected to the programmable circuit in communication, the programmable circuit is connected to the DAC circuit in communication, the DAC circuit is electrically connected to the voltage-adjustable voltage-stabilizing circuit, the output voltage of the voltage-adjustable voltage-stabilizing circuit is used as the power supply voltage of the air pump, and the programmable circuit is also connected to the memory in communication. When the staff tests that the flow output of the air pump is not within the range of technical requirements, the output voltage V of the DAC circuit is adjusted up or down by the external device. DAC , and then adjust the output voltage of the voltage-adjustable voltage-stabilizing circuit to make the air pump flow meet the technical requirements, and store the calibration parameters at this time into the memory. This ensures that the air pumps leaving the factory run with the calibrated parameters, thereby ensuring that the air pump flow meets the technical requirements and improving the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a principle block diagram of a power supply circuit capable of verifying the flow rate of an air pump according to an embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of a power supply circuit capable of verifying the flow of an air pump according to an embodiment of the utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0025] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Before the air pump is calibrated, the power supply circuit of the air pump operates with the default unified parameters. Due to the poor consistency of the air pump, the flow rate of different individuals of the same model of product will be quite different, resulting in many individuals failing to meet the technical requirements when leaving the factory, resulting in a low product qualification rate. To this end, the utility model provides a power supply circuit that can calibrate the air pump flow rate to improve the product qualification rate.

[0028] like Figure 1As shown, the power supply circuit capable of verifying the flow of the air pump includes: an external device, a programmable circuit, a DAC circuit, a voltage-adjustable voltage-stabilizing circuit and a memory. The external device is communicatively connected to the programmable circuit, the programmable circuit is communicatively connected to the DAC circuit, the DAC circuit is electrically connected to the voltage-adjustable voltage-stabilizing circuit, the output voltage of the voltage-adjustable voltage-stabilizing circuit is used as the power supply voltage of the air pump, and the programmable circuit is also communicatively connected to the memory.

[0029] Specifically, when the staff tests that the flow rate of the air pump output is not within the range of technical requirements, the staff can fine-tune the calibration parameters and set the fine-tuned calibration parameters in the external device. The external device transmits the calibration parameters to the programmable circuit through communication signal 1. After receiving the calibration parameters, the programmable circuit transmits them to the DAC circuit through communication signal 3. The DAC circuit fine-tunes the output voltage according to the calibration parameters, and inputs the output voltage at this time as the reference voltage of the voltage-adjustable voltage-stabilizing circuit. The voltage-adjustable voltage-stabilizing circuit adjusts the power supply voltage of the air pump according to the reference voltage at this time. Finally, when the flow rate of the air pump meets the technical requirements, the programmable circuit stores the calibration parameters at this time into the memory through communication signal 2. It is ensured that the air pump leaving the factory runs with the calibrated parameters, thereby ensuring that the flow rate of the air pump meets the technical requirements.

[0030] The utility model provides a power supply circuit capable of verifying the flow of an air pump, comprising: an external device, a programmable circuit, a DAC circuit, a voltage-adjustable voltage-stabilizing circuit and a memory, wherein the external device is connected to the programmable circuit in communication, the programmable circuit is connected to the DAC circuit in communication, the DAC circuit is electrically connected to the voltage-adjustable voltage-stabilizing circuit, the output voltage of the voltage-adjustable voltage-stabilizing circuit is used as the power supply voltage of the air pump, and the programmable circuit is also connected to the memory in communication. When the staff tests that the flow output of the air pump is not within the range of technical requirements, the output voltage V of the DAC circuit is adjusted up or down by the external device. DAC , and then adjust the output voltage of the voltage-adjustable voltage-stabilizing circuit to make the air pump flow meet the technical requirements, and store the calibration parameters at this time into the memory. This ensures that the air pumps leaving the factory run with the calibrated parameters, thereby ensuring that the air pump flow meets the technical requirements and improving the product qualification rate.

[0031] In an optional implementation, the external device is also communicatively connected to the memory.

[0032] Specifically, when the calibration parameters are fine-tuned by an external device so that the flow rate of the air pump meets the technical requirements, in addition to using the programming circuit to store the calibration parameters at this time into the memory through the communication signal 2, this embodiment can also use another writing path, that is, the external device directly writes the calibration parameters at this time into the memory. In this embodiment, no matter which writing path is used, when the air pump works normally after leaving the factory, the reading path of the programmable circuit reading the parameters stored in the memory through the communication signal 2 is used.

[0033] In an optional implementation, the memory is a non-volatile memory.

[0034] Specifically, a non-volatile memory is used to store the voltage configuration parameters of the power supply circuit that can verify the air pump flow rate, and the data will not be lost even in the case of power failure. The memory can be an independent external memory or a memory integrated in a programmable device.

[0035] In an optional implementation, the communication methods between the external device and the programmable circuit, between the programmable circuit and the DAC circuit, and between the external device and the memory include but are not limited to USB, UART, I2C, and SPI.

[0036] Specifically, the communication modes of the communication signals 1 to 3 include but are not limited to USB, UART, I2C, SPI, etc. In this embodiment, the programmable circuit is implemented by MCU or FPGA.

[0037] In an optional implementation, the voltage-adjustable voltage stabilizing circuit is a switching voltage stabilizing circuit or an adjustable LDO circuit.

[0038] Specifically, if Figure 2 As shown, the output pin of the DAC circuit is connected to the feedback pin of the voltage-adjustable voltage regulator circuit. The feedback pin of the voltage-adjustable voltage regulator circuit receives the reference voltage V output by the DAC circuit. DAC The voltage adjustable voltage regulator circuit is based on the reference voltage V at this time DAC Adjust the supply voltage of the air pump. In this embodiment, the voltage-adjustable voltage-stabilizing circuit may be a switching voltage-stabilizing circuit (including but not limited to buck, boost, buck-boost circuits, etc.), or an adjustable LDO circuit.

[0039] In an optional embodiment, if Figure 2 As shown, the DAC circuit includes: a DAC chip and a seventh resistor. The data line pin and the clock line pin of the DAC chip are connected to the programmable circuit, and the output pin of the DAC chip is connected to the voltage-adjustable voltage-stabilizing circuit through the seventh resistor.

[0040] Specifically, the DAC chip uses I2C communication to receive data transmitted by the programmable circuit and provides a variable reference voltage V for the voltage-adjustable voltage regulator circuit through the output pin. DAC In this embodiment, the DAC chip model is not limited here, and the specific peripheral circuit and communication method of the DAC circuit will vary according to the selected DAC chip.

[0041] In an optional embodiment, if Figure 2As shown, the voltage-adjustable voltage-stabilizing circuit includes: a voltage-stabilizing chip U1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and an inductor L1.

[0042] Among them, the power input pin of the voltage stabilizing chip U1 is respectively connected to the external power supply and one end of the third capacitor C3, and the other end of the third capacitor C3 is grounded. The enable pin of the voltage stabilizing chip U1 is respectively connected to one end of the second resistor R2 and one end of the third resistor R3, the other end of the second resistor R2 is connected to the enable signal, and the other end of the third resistor R3 is grounded. The switch pin of the voltage stabilizing chip U1 is respectively connected to one end of the first capacitor C1 and one end of the inductor L1, the other end of the inductor L1 is respectively connected to one end of the first resistor R1 and one end of the second capacitor C2, the other end of the first resistor R1 is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is grounded, one end of the second capacitor C2 serves as the output end of the air pump power supply voltage, and the other end of the second capacitor C2 is grounded. The bootstrap pin of the voltage stabilizing chip U1 is connected to the other end of the first capacitor C1. The feedback pin of the voltage stabilizing chip U1 is respectively connected to the other end of the first resistor R1 and one end of the fourth resistor R4.

[0043] Specifically, the type of voltage regulator chip U1 is not limited here. The specific peripheral circuit and communication method of the voltage adjustable voltage regulator circuit will vary according to the selected voltage regulator chip U1. Figure 2 When the DAC circuit and voltage adjustable voltage regulator circuit are shown, the air pump supply voltage V PUMP =[V FB / R4-(V DAC -V FB ) / R7]*R1+V FB , where only V DAC A variable, so V PUMP By changing V DAC To adjust.

[0044] In an optional implementation, the external device is a visual programming device.

[0045] Specifically, the external device may be a computer or other device, which is not specifically limited here.

[0046] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A power supply circuit capable of verifying the flow rate of an air pump, characterized in that: include: External device, programmable circuit, DAC circuit, voltage adjustable voltage regulator circuit and memory, wherein: The external device is communicatively connected to the programmable circuit, the programmable circuit is communicatively connected to the DAC circuit, the DAC circuit is electrically connected to the voltage-adjustable voltage-stabilizing circuit, the output voltage of the voltage-adjustable voltage-stabilizing circuit serves as the power supply voltage of the air pump, and the programmable circuit is also communicatively connected to the memory.

2. The power supply circuit capable of verifying the flow of an air pump according to claim 1, characterized in that: The external device is also communicatively connected to the memory.

3. The power supply circuit capable of verifying the flow of an air pump according to claim 1, characterized in that: The memory is a non-volatile memory.

4. The power supply circuit capable of verifying the flow of an air pump according to claim 2, characterized in that: The communication methods between the external device and the programmable circuit, between the programmable circuit and the DAC circuit, and between the external device and the memory include but are not limited to USB, UART, I2C, and SPI.

5. The power supply circuit capable of verifying the flow of an air pump according to claim 1, characterized in that: The voltage adjustable voltage stabilizing circuit is a switching voltage stabilizing circuit or an adjustable LDO circuit.

6. The power supply circuit capable of verifying the flow of an air pump according to claim 5, characterized in that: The DAC circuit includes: a DAC chip and a seventh resistor, wherein: The data line pin and the clock line pin of the DAC chip are connected to the programmable circuit, and the output pin of the DAC chip is connected to the voltage-adjustable voltage stabilizing circuit through the seventh resistor.

7. The power supply circuit capable of verifying the flow rate of an air pump according to claim 1 or 6, characterized in that: The voltage adjustable voltage stabilizing circuit comprises: a voltage stabilizing chip, a first capacitor, a second capacitor, a third capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, and an inductor, wherein: The power input pin of the voltage stabilizing chip is respectively connected to an external power supply and one end of the third capacitor, and the other end of the third capacitor is grounded; The enable pin of the voltage stabilizing chip is respectively connected to one end of the second resistor and one end of the third resistor, the other end of the second resistor is connected to the enable signal, and the other end of the third resistor is grounded; The switch pin of the voltage stabilizing chip is respectively connected to one end of the first capacitor and one end of the inductor, the other end of the inductor is respectively connected to one end of the first resistor and one end of the second capacitor, the other end of the first resistor is connected to one end of the fourth resistor, the other end of the fourth resistor is grounded, one end of the second capacitor serves as the output end of the air pump power supply voltage, and the other end of the second capacitor is grounded; The bootstrap pin of the voltage stabilizing chip is connected to the other end of the first capacitor; The feedback pin of the voltage stabilizing chip is respectively connected to the other end of the first resistor and one end of the fourth resistor.

8. The power supply circuit capable of verifying the flow of an air pump according to claim 1, characterized in that: The external device is a visual programming device.

9. The power supply circuit capable of verifying the flow of an air pump according to claim 1, characterized in that: The programmable circuit is implemented by MCU or FPGA.

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