Earphone magnet detection circuit and TWS earphone magnet detection device

Abstract

The utility model provides an earphone magnet detection circuit and a TWS earphone magnet detection device.The earphone magnet detection circuit comprises a Hall sensing circuit, a magnet detection acquisition circuit and an acquisition output circuit, and the Hall sensing circuit comprises a Hall sensing single-chip microcomputer and a first capacitor; the magnet detection and acquisition circuit comprises a magnet detection and acquisition single chip microcomputer and a first resistor, the earphone magnet detection circuit can determine whether adsorption force exists between the earphone and the charging box according to the Hall magnetic field induction intensity, and if the Hall magnetic field induction intensity is within a normal range, it is indicated that the earphone product can pass the inspection test; if the induction intensity of the Hall magnetic field is too low, it can be confirmed that the earphone product belongs to a defective product, and operators can conveniently process the defective product in time. According to the circuit, the manual inspection action is canceled, the problem that defective products flow out due to incomplete manual inspection is solved, the reject ratio of the products is reduced, and then the subsequent use experience of a user is guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of TWS earphones, and particularly to a headphone magnet detection circuit and a TWS headphone magnet detection device. Background Art

[0002] In recent years, the production volume and output value of TWS (True Wireless Stereo) earphones have been in a state of rapid growth. During the mass production process of TWS earphones, manual inspection is carried out, specifically, manually picking up and placing the earphones, and subjectively feeling whether there is an adsorption force between the earphones and the charging case, so as to judge whether the earphone magnets are missing in this way.

[0003] However, this manual picking up and placing of the earphones can only rely on subjective feeling of whether there is an adsorption force and cannot be confirmed based on data. Thus, when the operator is inattentive, there is a situation of product missed inspection. In this way, it cannot be guaranteed whether there is an adsorption force between the earphones and the charging case, so it cannot be guaranteed that all products pass the test, and there is a possibility of defective products flowing out, which will further affect the user experience of using TWS earphones subsequently.

[0004] Therefore, a device is needed to solve the problem of the increase in the defective rate of products caused by incomplete manual inspection. Utility Model Content

[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a headphone magnet detection circuit and a TWS headphone magnet detection device that can solve the problem of the increase in the defective rate of products caused by incomplete manual inspection and ensure the subsequent user experience.

[0006] The purpose of the present disclosure is achieved by the following technical solutions:

[0007] A headphone magnet detection circuit includes:

[0008] A Hall sensing circuit, including a Hall sensing single-chip microcomputer and a first capacitor. The output end of the Hall sensing single-chip microcomputer is used to sense the headphone magnet. The upper half of the first capacitor is electrically connected to the voltage end of the Hall sensing single-chip microcomputer, and the lower half of the first capacitor is grounded;

[0009] A magnet detection acquisition circuit, including a magnet detection acquisition single-chip microcomputer and a first resistor. The first end of the first resistor is connected to the output end of the Hall sensing single-chip microcomputer, the second end of the first resistor is connected to the detection acquisition end of the magnet detection acquisition single-chip microcomputer, and the voltage output end of the magnet detection acquisition single-chip microcomputer is electrically connected to the voltage end of the Hall sensing single-chip microcomputer;

[0010] The acquisition output circuit, the data acquisition output end of the magnet detection and acquisition single-chip microcomputer is electrically connected to the data receiving end of the acquisition output circuit, and the data transceiver end of the acquisition output circuit is used to connect to a test computer.

[0011] In one embodiment, the model of the Hall sensing single-chip microcomputer is AS1918DRN.

[0012] In one embodiment, the magnet detection and acquisition circuit further includes a second resistor, the first end of the second resistor is connected to the system boot end of the magnet detection and acquisition single-chip microcomputer, and the second end of the second resistor is grounded.

[0013] In one embodiment, the model of the magnet detection and acquisition single-chip microcomputer is CS32F03K8V6.

[0014] In one embodiment, the acquisition output circuit includes a USB connector and a voltage stabilization single-chip microcomputer. The voltage output end of the voltage stabilization single-chip microcomputer is electrically connected to the voltage end of the magnet detection and acquisition single-chip microcomputer. The power supply connection end of the USB connector is electrically connected to the voltage input end of the voltage stabilization single-chip microcomputer. The data acquisition output end of the magnet detection and acquisition single-chip microcomputer is electrically connected to the positive and negative data ends of the USB connector, and the USB connector is used to connect to the test computer.

[0015] In one embodiment, the acquisition output circuit further includes a third resistor, the first end of the third resistor is connected to the voltage input end of the voltage stabilization single-chip microcomputer, and the second end of the third resistor is connected to the voltage output end of the voltage stabilization single-chip microcomputer.

[0016] In one embodiment, the acquisition output circuit further includes a second capacitor. The upper half end of the second capacitor is respectively electrically connected to the voltage output end of the voltage stabilization single-chip microcomputer and the voltage end of the magnet detection and acquisition single-chip microcomputer, and the lower half end of the second capacitor is grounded.

[0017] In one embodiment, the acquisition output circuit further includes a bidirectional voltage stabilizing diode. The first end of the bidirectional voltage stabilizing diode is connected to the upper half end of the second capacitor, and the second end of the bidirectional voltage stabilizing diode is connected to the lower half end of the second capacitor.

[0018] In one embodiment, the model of the voltage stabilization single-chip microcomputer is RS3221-3.0YUTDN4.

[0019] A TWS earphone magnet detection device includes the earphone magnet detection circuit according to any one of the above embodiments.

[0020] Compared with the prior art, the present disclosure has at least the following advantages:

[0021] The headphone magnet detection circuit can utilize the magnitude of the Hall magnetic field induction intensity to confirm whether there is an adsorption force between the headphone and the charging case. If the Hall magnetic field induction intensity is within the normal range, it indicates that the headphone product can pass the inspection test. If the Hall magnetic field induction intensity is too low, it can be confirmed that the headphone product is a defective product, facilitating the operator to process the defective product in a timely manner. The above headphone magnet detection circuit cancels the manual inspection operation, solves the problem of defective products flowing out due to incomplete manual inspection, reduces the product defect rate, and thus ensures the user experience in subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0023] Figure 1 FIG. is a circuit diagram of a headphone magnet detection circuit in an embodiment;

[0024] Figure 2 is Figure 1 a circuit diagram of the Hall sensing circuit in the headphone magnet detection circuit shown;

[0025] Figure 3 is Figure 1 a circuit diagram of the magnet detection acquisition circuit in the headphone magnet detection circuit shown;

[0026] Figure 4 is Figure 1 a circuit diagram of the acquisition output circuit in the headphone magnet detection circuit shown.

[0027] Reference numerals: 10, headphone magnet detection circuit; 100, Hall sensing circuit; 200, magnet detection acquisition circuit; 300, acquisition output circuit; J1, USB connector; U3, voltage stabilizing single-chip microcomputer; U5, magnet detection acquisition single-chip microcomputer; U6, Hall sensing single-chip microcomputer; C29, first capacitor; C11, second capacitor; D12, bidirectional voltage stabilizing diode; R52, first resistor; R62, second resistor; R15, third resistor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To facilitate the understanding of the present disclosure, the following will describe the present disclosure more comprehensively with reference to the relevant drawings. The preferred embodiments of the present disclosure are shown in the drawings below. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure content of the present disclosure more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this disclosure pertains. The terms used in the specification of this disclosure herein are only for the purpose of describing specific implementations and are not intended to limit this disclosure. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] To better understand the technical solutions and beneficial effects of this disclosure, the following further describes this disclosure in detail with specific embodiments:

[0032] Please refer to Figures 1 to 4 , which is the headphone magnet detection circuit 10 of an embodiment of the present utility model, including a Hall sensing circuit 100, a magnet detection acquisition circuit 200 and an acquisition output circuit 300.

[0033] The Hall sensing circuit 100 includes a Hall sensing single-chip microcomputer U6 and a first capacitor C29. The output end of the Hall sensing single-chip microcomputer U6 is used to sense the headphone magnet. The upper half of the first capacitor C29 is electrically connected to the voltage terminal of the Hall sensing single-chip microcomputer U6, and the lower half of the first capacitor C29 is grounded; the magnet detection acquisition circuit 200 includes a magnet detection acquisition single-chip microcomputer U5 and a first resistor R52. The first end of the first resistor R52 is connected to the output end of the Hall sensing single-chip microcomputer U6, and the second end of the first resistor R52 is connected to the detection acquisition end of the magnet detection acquisition single-chip microcomputer U5. The voltage output end of the magnet detection acquisition single-chip microcomputer U5 is electrically connected to the voltage terminal of the Hall sensing single-chip microcomputer U6; the data acquisition output end of the magnet detection acquisition single-chip microcomputer U5 is electrically connected to the data receiving end of the acquisition output circuit 300, and the data transceiver end of the acquisition output circuit 300 is used to connect to a test computer. Among them, the first capacitor C29 is used to filter and regulate the voltage when the magnet detection acquisition single-chip microcomputer U5 outputs a voltage to the Hall sensing single-chip microcomputer U6, ensuring that the output voltage does not mutate, and thus ensuring the normal operation of the Hall sensing single-chip microcomputer U6. The first resistor R52 is used to limit the current and prevent the current from being too large and damaging the magnet detection acquisition single-chip microcomputer U5, ensuring the normal operation of the magnet detection acquisition single-chip microcomputer U5.

[0034] In this embodiment, the headphone magnet detection circuit 10 can utilize the magnitude of the Hall magnetic field induction intensity to confirm whether there is an adsorption force between the headphone and the charging case. If the Hall magnetic field induction intensity is within the normal range, it indicates that the headphone product can pass the inspection test. If the Hall magnetic field induction intensity is too low, it can be confirmed that the headphone product is a defective product, facilitating the operator to promptly process the defective product. The above-mentioned headphone magnet detection circuit 10 eliminates the manual inspection operation, solves the problem of defective products flowing out due to incomplete manual inspection, reduces the product defect rate, and thus ensures the user experience in subsequent use.

[0035] It can be understood that the headphone magnet detection circuit 10 adopts a Hall sensing circuit 100. When the headphone magnet detection device is connected to the test computer, the Hall sensing single-chip microcomputer U6 can sense the magnet inside the TWS headphone. At this time, the magnet detection acquisition single-chip microcomputer U5 can collect the Hall magnetic field induction data of the headphone magnet and output the data to the test computer through the acquisition output circuit 300, so that the test computer displays the Hall magnetic field induction intensity value. If the intensity value is within the normal range, specifically 120 - 170, it indicates that there is an adsorption force between the headphone and the charging case and it can pass the inspection test. If the intensity value is not within the normal range, it indicates that there is a situation of missing magnet installation or poor adsorption between the headphone and the charging case and it cannot pass the inspection test. This facilitates the operator to promptly process the products that cannot pass the inspection test to reduce the product defect rate and ensure the quality of the headphone products.

[0036] In this embodiment, the model of the Hall sensing single-chip microcomputer U6 is AS1918DRN.

[0037] As Figure 3 shown, in one of the embodiments, the magnet detection acquisition circuit 200 further includes a second resistor R62. The first end of the second resistor R62 is connected to the system boot terminal BOOT0 of the magnet detection acquisition single-chip microcomputer U5, and the second end of the second resistor R62 is grounded. It can be understood that when the magnet detection acquisition single-chip microcomputer U5 is grounded through the second resistor R62, it can play a role in limiting current and protecting the circuit, preventing the possible current impact or short-circuit risk caused by the system boot terminal being directly grounded, ensuring that the magnet detection acquisition single-chip microcomputer U5 can start and operate normally when powered on, and also avoiding the interference of external signals. In this embodiment, the model of the magnet detection acquisition single-chip microcomputer U5 is CS32F03K8V6.

[0038] As Figure 4As shown, in one embodiment, the acquisition and output circuit 300 includes a USB connector J1 and a voltage-stabilizing single-chip microcomputer U3. The voltage output terminal of the voltage-stabilizing single-chip microcomputer U3 is electrically connected to the voltage terminal of the magnet detection and acquisition single-chip microcomputer U5. The power supply terminal VBUS of the USB connector J1 is electrically connected to the voltage input terminal of the voltage-stabilizing single-chip microcomputer U3. The data acquisition output terminal of the magnet detection and acquisition single-chip microcomputer U5 is electrically connected to the positive and negative data terminals of the USB connector J1. The USB connector J1 is used to connect to a test computer. It can be understood that when the magnet detection and acquisition single-chip microcomputer U5 acquires the magnet magnetic induction data, the data is output to the test computer through the USB connector J1. The test computer displays the current Hall electromagnetic induction intensity value according to the magnetic induction data and outputs a result according to whether the intensity value is within the normal range. The voltage-stabilizing single-chip microcomputer U3 is used to stabilize the voltage of the USB connector J1 and output it to the magnet detection and acquisition circuit 200, which can reduce the situation of voltage mutation of the USB connector J1 and ensure the normal operation of the device. In another embodiment, after the magnet detection and acquisition single-chip microcomputer U5 acquires the magnetic induction information of the earphone magnet, it reaches the USB connector J1 through the SWD interface (the combination of the SWDIO terminal and the SWCLK terminal), and finally is transmitted to the test computer to display the data and test results. In this embodiment, the model of the voltage-stabilizing single-chip microcomputer U3 is RS3221-3.0YUTDN4.

[0039] As Figure 4 shown, in one embodiment, the acquisition and output circuit 300 further includes a third resistor R15. The first end of the third resistor R15 is connected to the voltage input terminal of the voltage-stabilizing single-chip microcomputer U3, and the second end of the third resistor R15 is connected to the voltage output terminal of the voltage-stabilizing single-chip microcomputer U3. It can be understood that a third resistor R15 is added between the voltage input terminal and the voltage output terminal of the voltage-stabilizing single-chip microcomputer U3. Among them, the third resistor R15 is used to limit the current and protect the subsequent magnet detection and acquisition single-chip microcomputer U5 from being impacted by excessive current, ensuring the normal operation of the entire circuit.

[0040] As Figure 4 shown, in one embodiment, the acquisition and output circuit 300 further includes a second capacitor C11. The upper half of the second capacitor C11 is electrically connected to the voltage output terminal of the voltage-stabilizing single-chip microcomputer U3 and the voltage terminal of the magnet detection and acquisition single-chip microcomputer U5 respectively, and the lower half of the second capacitor C11 is grounded. It can be understood that when the voltage-stabilizing single-chip microcomputer U3 outputs voltage to supply power to the magnet detection and acquisition single-chip microcomputer U5, the second capacitor C11 can stabilize the voltage and filter the signal of the voltage, avoiding large fluctuations in the voltage caused by the current magnitude on the USB connector J1.

[0041] As Figure 4As shown, in one embodiment, the acquisition output circuit 300 further includes a bidirectional voltage stabilizing diode D12. The first end of the bidirectional voltage stabilizing diode D12 is connected to the upper half of the second capacitor C11, and the second end of the bidirectional voltage stabilizing diode D12 is connected to the lower half of the second capacitor C11. It can be understood that the bidirectional voltage stabilizing diode D12 is connected in parallel with the second capacitor C11, which can further stabilize the voltage, making the output voltage more stable and not affected by the change in the magnitude of the load current, thus causing voltage fluctuations. On the one hand, the second capacitor C11 can effectively filter interference signals, and the bidirectional voltage stabilizing diode D12 has bidirectional conductivity, which can help the second capacitor C11 filter out interference signals from different directions; on the other hand. When the voltage of the circuit exceeds the breakdown voltage value of the bidirectional voltage stabilizing diode D12, the bidirectional voltage stabilizing diode D12 is fully conducting. After being connected in parallel with the second capacitor C11, the second capacitor C11 can absorb or release energy during voltage fluctuations to maintain a stable voltage output.

[0042] The present disclosure also provides a TWS earphone magnet detection device, including the earphone magnet detection circuit 10 of any one of the above embodiments.

[0043] Compared with the prior art, the present disclosure has at least the following advantages:

[0044] The earphone magnet detection circuit 10 can utilize the magnitude of the Hall magnetic field induction intensity to confirm whether there is an adsorption force between the earphone and the charging case. If the Hall magnetic field induction intensity is within the normal range, it indicates that the earphone product can pass the inspection test. If the Hall magnetic field induction intensity is too low, it can be confirmed that the earphone product is a defective product, which is convenient for the operator to process the defective product in time. The above earphone magnet detection circuit 10 cancels the manual inspection operation, solves the problem of defective products flowing out due to incomplete manual inspection, reduces the product defect rate, and thus ensures the user experience in subsequent use.

[0045] The above-described embodiments only represent several implementation manners of the present disclosure, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the disclosed patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present disclosure, several modifications and improvements can still be made, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent shall be subject to the appended claims.

Claims

1. A headphone magnet detection circuit, characterized in that Comprising: A Hall sensing circuit, including a Hall sensing single-chip microcomputer and a first capacitor. The output end of the Hall sensing single-chip microcomputer is used to sense the earphone magnet. The upper half end of the first capacitor is electrically connected to the voltage end of the Hall sensing single-chip microcomputer, and the lower half end of the first capacitor is grounded; A magnet detection and acquisition circuit, including a magnet detection and acquisition single-chip microcomputer and a first resistor. The first end of the first resistor is connected to the output end of the Hall sensing single-chip microcomputer, the second end of the first resistor is connected to the detection and acquisition end of the magnet detection and acquisition single-chip microcomputer, and the voltage output end of the magnet detection and acquisition single-chip microcomputer is electrically connected to the voltage end of the Hall sensing single-chip microcomputer; An acquisition and output circuit, the data acquisition output end of the magnet detection and acquisition single-chip microcomputer is electrically connected to the data receiving end of the acquisition and output circuit, and the data transceiver end of the acquisition and output circuit is used to connect to a test computer.

2. The headphone magnet detection circuit according to claim 1, characterized in that, The model of the Hall sensing single-chip microcomputer is AS1918DRN.

3. The headphone magnet detection circuit according to claim 1, wherein The magnet detection and acquisition circuit further includes a second resistor. The first end of the second resistor is connected to the system boot end of the magnet detection and acquisition single-chip microcomputer, and the second end of the second resistor is grounded.

4. The headphone magnet detection circuit according to claim 1, characterized in that, The model of the magnet detection and acquisition single-chip microcomputer is CS32F03K8V6.

5. The earphone magnet detection circuit according to claim 1, wherein, The acquisition and output circuit includes a USB connector and a voltage stabilizing single-chip microcomputer. The voltage output end of the voltage stabilizing single-chip microcomputer is electrically connected to the voltage end of the magnet detection and acquisition single-chip microcomputer. The power supply connection end of the USB connector is electrically connected to the voltage input end of the voltage stabilizing single-chip microcomputer. The data acquisition output end of the magnet detection and acquisition single-chip microcomputer is electrically connected to the positive and negative data ends of the USB connector, and the USB connector is used to connect to the test computer.

6. The earphone magnet detection circuit according to claim 5, wherein The acquisition and output circuit further includes a third resistor. The first end of the third resistor is connected to the voltage input end of the voltage stabilizing single-chip microcomputer, and the second end of the third resistor is connected to the voltage output end of the voltage stabilizing single-chip microcomputer.

7. The headphone magnet detection circuit according to claim 5, characterized in that, The acquisition and output circuit further includes a second capacitor. The upper half end of the second capacitor is respectively electrically connected to the voltage output end of the voltage stabilizing single-chip microcomputer and the voltage end of the magnet detection and acquisition single-chip microcomputer, and the lower half end of the second capacitor is grounded.

8. The headphone magnet detection circuit according to claim 7, wherein The acquisition and output circuit further includes a bidirectional voltage stabilizing diode. The first end of the bidirectional voltage stabilizing diode is connected to the upper half end of the second capacitor, and the second end of the bidirectional voltage stabilizing diode is connected to the lower half end of the second capacitor.

9. The headphone magnet detection circuit according to claim 5, characterized in that, The model of the voltage stabilizing single-chip microcomputer is RS3221-3.0YUTDN4.

10. A TWS earphone magnet detection device, characterized in that, An earphone magnet detection circuit according to any one of claims 1-9.

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