Microphone power supply device integrating current monitoring and portable energy storage

Abstract

The invention relates to the technical field of electronic device testing, and discloses a microphone power supply device integrating current monitoring and portable energy storage. Comprising an adaptive power supply access unit, a lithium battery protection unit, an intelligent lithium battery equalization charging and discharging regulation and control unit, a high-efficiency direct-current voltage boosting converter, a 12V adjustable voltage reduction control unit, a microphone interface circuit, a five-bit LCD digital ammeter interface circuit and an oscilloscope interface circuit. The intelligent lithium battery equalization charge and discharge regulation and control unit is respectively connected with the adaptive power supply access unit, the lithium battery protection unit, the high-efficiency direct current voltage conversion unit and the five-bit LCD digital ammeter interface circuit, the high-efficiency direct current voltage conversion unit is connected with the 12V adjustable voltage reduction control unit, and the 12V adjustable voltage reduction unit is connected with the microphone interface circuit. The microphone interface circuit is also connected with the five-bit LCD digital ammeter interface circuit and the oscilloscope interface circuit; the device is small in size, clear in circuit structure, high in precision and good in portability.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic device testing, and in particular to a microphone power supply device integrating current monitoring and portable energy storage. Background Art

[0002] With the rapid development of the microphone manufacturing industry, the diversification of product lines and the complexity of the production environment have put forward more stringent requirements on microphone performance testing technology. Although traditional test equipment has met the needs of basic performance testing to a certain extent, its limitations in practical applications have become increasingly prominent, becoming a key factor restricting production efficiency and product quality improvement.

[0003] First, the test is complex and costly: the traditional microphone test process relies on auxiliary equipment such as external DC power supply, current limiting resistor and digital ammeter, which not only increases the complexity and difficulty of the test, but also raises the test cost due to the use of additional equipment. At the same time, complex connection lines and multiple plug-in and unplug operations are prone to introduce measurement errors, reducing the accuracy and reliability of the test results.

[0004] Second, the lack of portability and flexibility: With the improvement of production line automation and intelligence, higher requirements are placed on the portability and flexibility of test equipment. However, traditional test equipment is often bulky, not easy to move quickly between production lines, and mostly relies on fixed power supply, which limits its flexible application in different test scenarios, especially when frequent movement or outdoor testing is required. This limitation is particularly prominent.

[0005] The third challenge is the immediacy and accuracy of current measurement: the stability of the microphone's working current is directly related to its sound quality and durability. Therefore, fast and accurate detection of the working current has become an important part of screening defective products and ensuring product quality. Traditional testing methods are difficult to meet the needs of real-time detection on the production line in terms of measurement speed and accuracy, resulting in low production efficiency and lagging quality control.

[0006] In view of this, there is an urgent need for a microphone power supply test device that can integrate adjustable voltage, high-precision current display, and portable energy storage functions to improve test efficiency, reduce test costs, enhance test flexibility and accuracy, and thus promote the further development of the microphone manufacturing industry.

[0007] The present invention is proposed in view of the deficiencies in the prior art. Summary of the invention

[0008] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a microphone power supply device integrating current monitoring and portable energy storage.

[0009] The present invention can be implemented by the following technical solutions:

[0010] The invention discloses a microphone power supply device integrating current monitoring and portable energy storage, comprising an adaptive power access unit, a lithium battery protection unit, an intelligent lithium battery balanced charge and discharge control unit, a high-efficiency DC voltage boost converter, a 12V adjustable step-down control unit, a microphone interface circuit, a five-digit LCD digital ammeter interface circuit, and an oscilloscope interface circuit, which are connected in sequence. The intelligent lithium battery balanced charge and discharge control unit is respectively connected to the adaptive power access unit, the lithium battery protection unit, the high-efficiency DC voltage conversion unit, and the five-digit LCD digital ammeter interface circuit, the high-efficiency DC voltage conversion unit is further connected to the 12V adjustable step-down control unit, the 12V adjustable step-down unit is further connected to the microphone interface circuit, and the microphone interface circuit is also connected to the five-digit LCD digital ammeter interface circuit and the oscilloscope interface circuit.

[0011] Preferably, the power adapter access unit is a Type-C interface circuit, and when the lithium battery is low on power, the battery is charged at 5V through an intelligent lithium battery balanced charge and discharge control system;

[0012] Preferably, the lithium battery protection unit is used to connect the 3.7V lithium battery to the entire circuit system, and is used to prevent the lithium battery from working abnormally, and to prevent damage to other components when the lithium battery is abnormal;

[0013] Preferably, the intelligent lithium battery balanced charge and discharge control system is used to control the charge and discharge of the lithium battery. When the Type-C interface is not connected to the data line, the 3.7V lithium battery is boosted to 5V by the built-in boost circuit of the intelligent lithium battery balanced charge and discharge control unit to supply power to the subsequent circuit. When the Type-C interface is connected to the data line, the data line charges the lithium battery at 4.2V through the charging management circuit, and at the same time supplies 5V power to the subsequent circuit.

[0014] Preferably, the high-efficiency DC voltage boost converter can directional boost 5V to 12V;

[0015] Preferably, the 12V adjustable step-down control unit can control the output voltage of 12V through an adjustable resistor, and the output range is 0-12V;

[0016] Preferably, the microphone interface circuit is used to lead out a DuPont line to be connected to a microphone pin;

[0017] Preferably, the oscilloscope interface circuit is used to collect the audio signal picked up by the microphone and connect it to an oscilloscope to facilitate observation of the audio waveform;

[0018] As an optional technical solution, the lithium battery protection unit chip uses IP3005;

[0019] As an optional technical solution, the intelligent lithium battery balanced charge and discharge control unit chip uses TP5400;

[0020] As an optional technical solution, the high-efficiency DC voltage boost converter chip uses TPS6104;

[0021] As an optional technical solution, the 12V adjustable step-down control unit chip uses LM317;

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] Safe battery energy storage is achieved through the lithium battery protection circuit and the lithium battery charging management circuit, and by the method of first boosting and then bucking, an adjustable regulated voltage output from 0 to 12V is formed, which can adapt to the working voltage requirements of different types of microphones. A five-digit LCD digital ammeter is also integrated to monitor the microphone working current in real time. The final result is a small size, clear circuit structure, high precision, and good portability, which solves the problems of high cost, large size, inconvenient transportation, complex wiring, and low measurement efficiency of traditional power supply test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 It is a basic functional block diagram of the device of the present invention;

[0026] Figure 2 It is a schematic diagram of the adaptor power access unit of the present invention;

[0027] Figure 3 This is a schematic diagram of a lithium battery protection unit of the present invention;

[0028] Figure 4 This is a schematic diagram of the intelligent lithium battery balanced charge and discharge control unit of the present invention;

[0029] Figure 5 A schematic diagram of a high-efficiency DC voltage boost converter according to the present invention;

[0030] Figure 6 It is a schematic diagram of a 12V adjustable step-down control unit of the present invention;

[0031] Figure 7 is a schematic diagram of a microphone interface circuit of the present invention;

[0032] Figure 8 is a schematic diagram of an oscilloscope interface circuit of the present invention; DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[0034] like Figures 1 to 8 As shown, this embodiment discloses a microphone power supply device with integrated current monitoring and portable energy storage, including an adaptive power access unit, a lithium battery protection unit, an intelligent lithium battery balanced charge and discharge control unit, a high-efficiency DC voltage boost converter, a 12V adjustable step-down control unit, a microphone interface circuit, a five-digit LCD digital ammeter interface circuit, and an oscilloscope interface circuit, which are connected in sequence. The intelligent lithium battery balanced charge and discharge control unit is respectively connected to the adaptive power access unit, the lithium battery protection unit, the high-efficiency DC voltage conversion unit, and the five-digit LCD digital ammeter interface circuit, the high-efficiency DC voltage conversion unit is connected to the 12V adjustable step-down control unit, the 12V adjustable step-down unit is connected to the microphone interface circuit, and the microphone interface circuit is also connected to the five-digit LCD digital ammeter interface circuit and the oscilloscope interface circuit.

[0035] The power adapter access unit includes a USB1 interface, a capacitor C0, a capacitor C01, a resistor R1, a resistor R2, and a Schottky diode D1. The A12 pin, the B12 pin, and the 7th pin of USB1 are directly grounded. The B5 pin of the power adapter access unit is connected to the ground through the resistor R2. The A5 pin of the power adapter access unit is connected to the ground through the resistor R1. The A9 pin of the power adapter access unit is electrically connected to the VBUS contact. The B9 pin of the power adapter access unit is electrically connected to the VBUS contact. The VBUS contact is connected to the ground through the capacitor C0 and the capacitor C01 connected in parallel. The power adapter access unit is electrically connected to the VCC5V contact through the second pin of the Schottky diode D1; the VCC5V contact is electrically connected to the intelligent lithium battery balanced charge and discharge control unit circuit. When the lithium battery is insufficient, the intelligent lithium battery balanced charge and discharge control system charges the battery at a voltage of 4.2V, and at the same time provides 5V power to the subsequent circuit.

[0036] The lithium battery protection unit includes a chip U1 of model IP3005, an X1 terminal, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R3, a resistor R4, and a capacitor R5. The 2nd, 3rd, and 4th pins of the chip U1 are all connected to the ground, the 6th pin of the chip U1 is electrically connected to the BAT+ contact through the resistor R3, and the BAT+ contact is electrically connected to the 1st pin of the X1 terminal, the 5th, 7th, 8th, and 9th pins of the chip U1 are all electrically connected to the BAT- contact, the BAT- contact is grounded through the capacitor C2 and electrically connected to the 2nd pin of the X1 terminal, and the BAT- contact is electrically connected to the 6th pin of the chip U1 through the capacitor C1. The lithium battery protection unit is used to connect the 3.7V lithium battery to the entire circuit board, and is used to prevent the lithium battery from working abnormally, and to prevent damage to other components when the lithium battery is abnormal.

[0037] The intelligent lithium battery balanced charge and discharge control unit includes a chip U2 of control model TP5400, capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, inductor L1, resistor R6, resistor R7, TVS diode D2, Schottky diode D3, light emitting diode LED1, light emitting diode LED2, the third pin of chip U2 is electrically connected to the ground through resistor R7, the seventh pin of chip U2 is electrically connected to the ground, the first pin of chip U2 is electrically connected to TVS diode D2, Schottky diode D3, capacitor C4, capacitor C5, and 5V voltage contact respectively, and the parallel electrical Capacitor C4, capacitor C5, and TVS diode D2 are grounded, and their 8th pins are electrically connected to Schottky diode D3 and inductor L1 respectively. The 6th pin of chip U2 is electrically connected to BAT+ contact, inductor L1, capacitor C6, capacitor C7, and capacitor C8 respectively, and the parallel capacitors C6, C7, and C8 are grounded. The 2nd and 4th pins of chip U2 are electrically connected to the cathode of LED2 and the cathode of LED1 respectively, and the anode of LED2 and the anode of LED1 are electrically connected to resistor R6. The 5th pin of chip U2 is electrically connected to VCC5V contact, capacitor C9, and resistor R6 respectively, and capacitor C9 is grounded. The 5V voltage contact is electrically connected to the high-efficiency DC voltage boost converter circuit, which can boost 5V to 12V.

[0038] Among them, the high-efficiency DC voltage boost converter includes a chip U3 of type TPS6104, a capacitor C10, a capacitor C11, a capacitor C12, an inductor L2, a resistor R8, a resistor R9, a resistor R10, and a Schottky diode D4. The first pin of the chip U3 is electrically connected to the 5V voltage contact through the inductor L2, the second pin of the Schottky diode D4 is electrically connected to the 12V voltage contact, the first pin of the Schottky diode D4 is electrically connected to the resistor R8 and the capacitor C10, and the Schottky diode D4 is connected to the ground through the capacitor C11, the second pin of the chip U3 is directly grounded, the third pin of the chip U3 is electrically connected to the resistor R9 and the capacitor C10, and the chip U3 is connected to the ground through the resistor R10, the fourth and fifth pins of the chip U3 are electrically connected to the 5V voltage contact, and the fourth and fifth pins of the chip U3 are connected to the ground through the capacitor C12. The 12V voltage contact is electrically connected to the 12V adjustable step-down control unit circuit, and the 12V output voltage can be controlled through an adjustable resistor, and the output range is 0-12V.

[0039] The 12V adjustable step-down control unit includes a chip U4 of LM317 type, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a resistor R11, a resistor R12, a Schottky diode D5, a Schottky diode D6, a sliding rheostat RP1, and a sliding rheostat RP2. The first pin of the chip U4 is electrically connected to the sliding rheostat RP1, the resistor R11, and the second pin of the diode D6. The first pin of the chip U4 is connected to the ground through the capacitor C17. The sliding rheostat The resistor RP1 is connected to the ground through the sliding resistor RP2, the second pin of the chip U4 is electrically connected to the 12V voltage contact and the first pin of the Schottky diode D5, and the second pin of the chip U4 is connected to the ground through the parallel capacitor C13 and capacitor C14, the third pin of the chip U4 is electrically connected to the second pin of the Schottky diode D5, the resistor R11, the first pin of the Schottky diode D6, and the VDD contact, and the third pin of the chip U4 is connected to the ground through the parallel capacitor C15, the capacitor C16, and the resistor R12. The output voltage can be changed by changing the values ​​of RP2 and RP1; the VDD contact is electrically connected to the microphone interface circuit, and is used to lead out the DuPont line and connect it to the microphone pin.

[0040] The microphone interface circuit includes a switch SW1, a socket X2, capacitors C18, C19, resistors R13, R14, the second pin of the switch SW1 is electrically connected to the M+ contact, and the second pin of the switch SW1 is connected to the ground through the capacitor C19, the first pin of the switch SW1 is electrically connected to the resistor R13, the second pin of the switch SW1 is electrically connected to the resistor R14, and the parallel resistor R13 and the resistor R14 are connected to the ground through the capacitor C18. The M+ contact is electrically connected to the oscilloscope interface circuit, which is used to collect the audio signal picked up by the microphone and connect it to the oscilloscope to facilitate the observation of the audio waveform.

[0041] Among them, the oscilloscope interface circuit includes a BNC1 interface, a capacitor C20, and a Schottky diode D7. The 2nd pin, the 3rd pin, the 4th pin, and the 5th pin of the BNC1 interface are all grounded, the 1st pin of the BNC1 interface is electrically connected to the M+ contact through the capacitor C20, and the 1st pin of the BNC1 interface is connected to the ground through the 1st pin of the Schottky diode D7.

[0042] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the technical principles of the present invention. These changes, modifications, substitutions and variations should also be regarded as the scope of protection of the present invention.

Claims

1. A microphone power supply device with integrated current monitoring and portable energy storage, characterized in that: It includes an adaptive power access unit, a lithium battery protection unit, an intelligent lithium battery balanced charge and discharge control unit, a high-efficiency DC voltage boost converter, a 12V adjustable step-down control unit, a microphone interface circuit, a five-digit LCD digital ammeter interface circuit, and an oscilloscope interface circuit, which are connected in sequence. The intelligent lithium battery balanced charge and discharge control unit is respectively connected to the adaptive power access unit, the lithium battery protection unit, the high-efficiency DC voltage conversion unit, and the five-digit LCD digital ammeter interface circuit, the high-efficiency DC voltage conversion unit is connected to the 12V adjustable step-down control unit, the 12V adjustable step-down unit is connected to the microphone interface circuit, and the microphone interface circuit is also connected to the five-digit LCD digital ammeter interface circuit and the oscilloscope interface circuit.

2. The microphone power supply device with integrated current monitoring and portable energy storage according to claim 1, characterized in that: The adapter power access unit includes a USB1 interface, a capacitor C0, a capacitor C01, a resistor R1, a resistor R2, and a Schottky diode D1. The A12 pin, the B12 pin, and the 7th pin of USB1 are directly grounded, the B5 pin of the adapter power access unit is connected to the ground through the resistor R2, the A5 pin of the adapter power access unit is connected to the ground through the resistor R1, the A9 pin of the adapter power access unit is electrically connected to the VBUS contact, the B9 pin of the adapter power access unit is electrically connected to the VBUS contact, the VBUS contact is connected to the ground through the parallel capacitor C0 and the capacitor C01, and the adapter power access unit is electrically connected to the VCC5V contact through the 2nd pin of the Schottky diode D1; the VCC5V contact is electrically connected to the circuit of the intelligent lithium battery balanced charge and discharge control unit.

3. The microphone power supply device with integrated current monitoring and portable energy storage according to claim 1, characterized in that: The lithium battery protection unit includes a chip U1 of model IP3005, an X1 terminal, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R3, a resistor R4, and a capacitor R5. The 2nd, 3rd, and 4th pins of the chip U1 are all connected to the ground, the 6th pin of the chip U1 is electrically connected to the BAT+ contact through the resistor R3, and the BAT+ contact is electrically connected to the 1st pin of the X1 terminal, the 5th, 7th, 8th, and 9th pins of the chip U1 are all electrically connected to the BAT- contact, the BAT- contact is grounded through the capacitor C2 and electrically connected to the 2nd pin of the X1 terminal, and the BAT- contact is electrically connected to the 6th pin of the chip U1 through the capacitor C1.

4. The microphone power supply device with integrated current monitoring and portable energy storage according to claim 1, characterized in that: The intelligent lithium battery balanced charge and discharge control unit includes a chip U2 of control model TP5400, capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, inductor L1, resistor R6, resistor R7, TVS diode D2, Schottky diode D3, light emitting diode LED1, light emitting diode LED2, the third pin of chip U2 is electrically connected to the ground through resistor R7, the seventh pin of chip U2 is electrically connected to the ground, the first pin of chip U2 is electrically connected to TVS diode D2, Schottky diode D3, capacitor C4, capacitor C5, and 5V voltage contact respectively, and the capacitors connected in parallel are connected to the ground. C4, capacitor C5, and TVS diode D2 are grounded, and their 8th pins are electrically connected to Schottky diode D3 and inductor L1 respectively, the 6th pin of chip U2 is electrically connected to BAT+ contact, inductor L1, capacitor C6, capacitor C7, and capacitor C8 respectively, and the capacitors C6, C7, and C8 connected in parallel are grounded, the 2nd and 4th pins of chip U2 are electrically connected to the cathode of LED2 and the cathode of LED1 respectively, and the anode of LED2 and the anode of LED1 are electrically connected to resistor R6, the 5th pin of chip U2 is electrically connected to VCC5V contact, capacitor C9, and resistor R6 respectively, and capacitor C9 is grounded.

5. The microphone power supply device with integrated current monitoring and portable energy storage according to claim 1, characterized in that: The high-efficiency DC voltage boost converter includes a chip U3 of type TPS6104, a capacitor C10, a capacitor C11, a capacitor C12, an inductor L2, a resistor R8, a resistor R9, a resistor R10, and a Schottky diode D4. The first pin of the chip U3 is electrically connected to the 5V voltage contact through the inductor L2, the second pin of the Schottky diode D4 is electrically connected to the 12V voltage contact, the first pin of the Schottky diode D4 is electrically connected to the resistor R8 and the capacitor C10, and the Schottky diode D4 is connected to the ground through the capacitor C11, the second pin of the chip U3 is directly grounded, the third pin of the chip U3 is electrically connected to the resistor R9 and the capacitor C10, and the chip U3 is connected to the ground through the resistor R10, the fourth and fifth pins of the chip U3 are electrically connected to the 5V voltage contact, and the fourth and fifth pins of the chip U3 are connected to the ground through the capacitor C12.

6. The microphone power supply device with integrated current monitoring and portable energy storage according to claim 1, characterized in that: The 12V adjustable step-down control unit includes a chip U4 of LM317 type, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a resistor R11, a resistor R12, a Schottky diode D5, a Schottky diode D6, a sliding rheostat RP1, and a sliding rheostat RP2. The first pin of the chip U4 is electrically connected to the sliding rheostat RP1, the resistor R11, and the second pin of the diode D6. The first pin of the chip U4 is connected to the ground through the capacitor C17. The sliding rheostat R P1 is connected to the ground through the sliding resistor RP2, the second pin of the chip U4 is electrically connected to the 12V voltage contact and the first pin of the Schottky diode D5, and the second pin of the chip U4 is connected to the ground through the parallel capacitors C13 and C14, the third pin of the chip U4 is electrically connected to the second pin of the Schottky diode D5, the resistor R11, the first pin of the Schottky diode D6, and the VDD contact, and the third pin of the chip U4 is connected to the ground through the parallel capacitors C15, C16, and R12.

7. The microphone power supply device with integrated current monitoring and portable energy storage according to claim 1, characterized in that: The microphone interface circuit includes a switch SW1, a socket X2, capacitors C18, C19, resistors R13, and R14. The second pin of the switch SW1 is electrically connected to the M+ contact, and the second pin of the switch SW1 is connected to the ground through the capacitor C19. The first pin of the switch SW1 is electrically connected to the resistor R13. The second pin of the switch SW1 is electrically connected to the resistor R14, and the parallel resistors R13 and R14 are connected to the ground through the capacitor C18.

8. The microphone power supply device with integrated current monitoring and portable energy storage according to claim 1, characterized in that: The oscilloscope interface circuit includes a BNC1 interface, a capacitor C20, and a Schottky diode D7. The second pin, the third pin, the fourth pin, and the fifth pin of the BNC1 interface are all grounded, the first pin of the BNC1 interface is electrically connected to the M+ contact through the capacitor C20, and the first pin of the BNC1 interface is connected to the ground through the first pin of the Schottky diode D7.

Images