CN216719085U - Interface circuit of life detection magnetic induction bracelet - Google Patents
Interface circuit of life detection magnetic induction bracelet Download PDFInfo
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- CN216719085U CN216719085U CN202122751710.6U CN202122751710U CN216719085U CN 216719085 U CN216719085 U CN 216719085U CN 202122751710 U CN202122751710 U CN 202122751710U CN 216719085 U CN216719085 U CN 216719085U
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Abstract
The utility model provides an interface circuit of a life detection magnetic induction bracelet, which comprises a USB interface, a data conversion chip and a filter circuit, wherein the USB interface comprises a first pin, a second pin, a third pin and a fourth pin, the first pin and the fourth pin are respectively connected with a main control board, the second pin and the third pin are respectively connected with the filter circuit and the data conversion chip, and the data conversion chip is connected with the main control board. According to the interface circuit of the life detection magnetic induction bracelet, no matter the master control board is communicated or powered, the PC end can directly input through the USB interface, an adapter is not needed, and the power supply utilization rate and the smoothness and accuracy of data transmission are improved.
Description
Technical Field
The utility model relates to the field of life detection magnetic induction bracelets, in particular to an interface circuit of a life detection magnetic induction bracelet.
Background
The present life detection magnetic induction bracelet is loved by many people. In the use of life detection magnetic induction bracelet, need be connected to through the interface circuit of life detection magnetic induction bracelet and be used for the PC end to realize data transmission and the power supply between PC end and the life detection magnetic induction bracelet. However, the port in the interface circuit in the existing life detection magnetic induction bracelet adopts an 8PIN interface, when the main control board in the life detection magnetic induction bracelet performs data transmission or power supply, the main control board needs to be externally connected to an external USB interface through the 8PIN interface through an adapter, and then the external USB interface performs data transmission or power supply with the PC end, and the interface circuit can realize communication and power supply between the main control board and the PC end only through the adapter equipment in the working process, so that the power supply utilization rate and the smoothness and accuracy of data transmission are reduced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide an interface circuit of a life detection magnetic induction bracelet, which can solve the problems that the communication and power supply between a main control board and a PC (personal computer) end can be realized only through a switching device in the working process of the interface circuit in the life detection magnetic induction bracelet, and the power supply utilization rate and the smoothness and accuracy of data transmission are reduced.
The purpose of the utility model is realized by adopting the following technical scheme:
the utility model provides an interface circuit of life detection magnetic induction bracelet, interface circuit is arranged in realizing communication and power supply between main control board and the PC end in the life detection magnetic induction bracelet, including USB interface, data conversion chip, filter circuit, the USB interface includes first pin, second pin, third pin and fourth pin, first pin with the fourth pin respectively with the main control board is connected, the second pin with the third pin respectively with filter circuit with the data conversion chip is connected, the data conversion chip with the main control board is connected.
Further, the filter circuit includes a first capacitor and a second capacitor, the first capacitor is connected between the USB data negative signal pin of the data conversion chip and the second pin, and the second capacitor is connected between the USB data positive signal pin of the data conversion chip and the third pin.
Further, one end of each of the first capacitor and the second capacitor is grounded.
Further, the capacitance values of the first capacitor and the second capacitor are both 20 PF.
Compared with the prior art, the utility model has the beneficial effects that: according to the interface circuit of the life detection magnetic induction bracelet, when the main control board and the PC end in the life detection magnetic induction bracelet are communicated, the PC end sends a control signal through the USB interface, the filter circuit filters differential mode interference between the USB interface and the data conversion chip to the control signal, the control signal after the differential mode interference is filtered is transmitted to the data conversion chip through the USB interface, and the control signal is converted by the data conversion chip and then is input to the main control board; when power is supplied between the main control board and the PC end in the life detection magnetic induction bracelet, the PC end directly supplies power to the main control board through the USB interface; no matter to main control board carry out communication or power supply, the PC end all can directly carry out the input through the USB interface, need not with the help of the adapter, has improved power utilization and data transmission's smooth and easy degree and precision.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model and do not constitute a limitation of the utility model. In the drawings:
fig. 1 is a schematic diagram of an interface circuit of a life detection magnetic induction bracelet according to the present invention;
fig. 2 is a schematic diagram of a signal flow direction of an interface circuit of a life detection magnetic induction bracelet according to the present invention during communication;
fig. 3 is a schematic view of a current flow direction of an interface circuit of the life detection magnetic induction bracelet according to the present invention when power is supplied.
In the figure: 10. a first capacitor; 20. a second capacitance.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
As shown in fig. 1, an interface circuit of life detection magnetic induction bracelet in this application, above-mentioned interface circuit is arranged in realizing communication and power supply between master control board and the PC end in the life detection magnetic induction bracelet, and interface circuit includes USB interface, data conversion chip, filter circuit, the USB interface includes first pin, second pin, third pin and fourth pin, first pin with the fourth pin respectively with the master control board is connected, the second pin with the third pin respectively with filter circuit with the data conversion chip is connected, the data conversion chip with the master control board is connected. Fig. 1 shows 1, 2, 3, and 4 respectively represent the first pin, the second pin, the third pin, and the fourth pin.
Preferably, the filter circuit includes a first capacitor 10 and a second capacitor 20, the first capacitor 10 is connected between the USB data negative signal pin of the data conversion chip and the second pin, and the second capacitor 20 is connected between the USB data positive signal pin of the data conversion chip and the third pin.
Preferably, one end of each of the first capacitor 10 and the second capacitor 20 is grounded.
Preferably, the capacitance values of the first capacitor 10 and the second capacitor 20 are both 20 PF.
The working principle is as follows: as shown in fig. 3, when the main control board in the life detection magnetic induction bracelet is powered by the PC terminal, the PC terminal directly transmits electric energy to the main control board through the first pin and the fourth pin in the USB interface.
As shown in fig. 2, when the main control board in the life detection magnetic induction bracelet is communicated through the PC terminal, the PC terminal inputs a control signal through the second pin and the third pin in the USB port, the filter circuit filters out differential mode interference between the USB interface and the data conversion chip for the control signal so that the control signal is not interfered by the control signal, and the control signal is input to the main control board after being subjected to data conversion by the data conversion chip, thereby realizing communication between the main control board and the PC terminal in the life detection magnetic induction bracelet.
According to the interface circuit of the life detection magnetic induction bracelet, when the main control board and the PC end in the life detection magnetic induction bracelet are communicated, the PC end sends a control signal through the USB interface, the filter circuit filters differential mode interference between the USB interface and the data conversion chip to the control signal, the control signal after the differential mode interference is filtered is transmitted to the data conversion chip through the USB interface, and the control signal is converted by the data conversion chip and then is input to the main control board; when power is supplied between the main control board and the PC end in the life detection magnetic induction bracelet, the PC end directly supplies power to the main control board through the USB interface; no matter to main control board carry out communication or power supply, the PC end all can directly carry out the input through the USB interface, need not with the help of the adapter, has improved power utilization and data transmission's smooth and easy degree and precision.
The foregoing is merely a preferred embodiment of this invention and is not intended to limit the utility model in any manner; one of ordinary skill in the art can readily practice the present invention as illustrated and described herein with reference to the accompanying drawings; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the utility model as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (4)
1. The utility model provides an interface circuit of life detection magnetic induction bracelet, interface circuit is arranged in realizing communication and power supply between master control board and the PC end in the life detection magnetic induction bracelet, its characterized in that: the USB interface comprises a first pin, a second pin, a third pin and a fourth pin, the first pin and the fourth pin are respectively connected with the main control board, the second pin and the third pin are respectively connected with the filter circuit and the data conversion chip, and the data conversion chip is connected with the main control board.
2. The interface circuit of life detection magnetic induction bracelet of claim 1, characterized in that: the filter circuit comprises a first capacitor and a second capacitor, the first capacitor is connected between a USB data negative signal pin of the data conversion chip and the second pin, and the second capacitor is connected between a USB data positive signal pin of the data conversion chip and the third pin.
3. The interface circuit of life detection magnetic induction bracelet of claim 2, characterized in that: one end of the first capacitor and one end of the second capacitor are both grounded.
4. The interface circuit of life detection magnetic induction bracelet of claim 2, characterized in that: the capacitance values of the first capacitor and the second capacitor are both 20 PF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122751710.6U CN216719085U (en) | 2021-11-10 | 2021-11-10 | Interface circuit of life detection magnetic induction bracelet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122751710.6U CN216719085U (en) | 2021-11-10 | 2021-11-10 | Interface circuit of life detection magnetic induction bracelet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216719085U true CN216719085U (en) | 2022-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122751710.6U Active CN216719085U (en) | 2021-11-10 | 2021-11-10 | Interface circuit of life detection magnetic induction bracelet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216719085U (en) |
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2021
- 2021-11-10 CN CN202122751710.6U patent/CN216719085U/en active Active
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