Medical personal protection helmet drive circuit

Abstract

The utility model discloses a kind of medical personal protection helmet drive circuit, including voltage input end, fan drive module, fan voltage output end, single-chip microcontroller, adjustable current feedback comparison circuit, headlight drive module, headlight voltage output end, fixed current feedback comparison circuit.Voltage input end is electrically connected fan drive module and headlight drive module respectively, and the output end of two drive modules is connected corresponding voltage output end respectively;Fan drive module is connected adjustable current feedback comparison circuit (including No. current feedback module, potentiometer and No. voltage comparison circuit), and headlight drive module is connected fixed current feedback comparison circuit (including No. current feedback module and No. voltage comparison circuit, trigger threshold value≤3V), both are electrically connected with single-chip microcontroller. Single-chip microcontroller is adjusted PWM duty cycle by feedback signal, realizes fan, headlight voltage adaptive output, solves the problem that existing drive circuit only supports 12V output, inconveniently carries headlight.

Description

Technical Field

[0001] This utility model relates to the field of driving circuits for medical protective helmets, and in particular to a driving circuit for a medical personal protective helmet. Background Technology

[0002] With the development of the medical industry and the upgrading of medical equipment, hospitals now appear to have increasingly mature and complete medical equipment. However, even so, the recent epidemic has revealed some shortcomings in my country's medical protective equipment. Specifically, these shortcomings include poor protective capabilities, harsh working environments inside protective equipment, and prolonged use leading to hypoxia, dehydration, and even viral infection among medical staff, seriously threatening their lives.

[0003] Existing medical protective helmet driver circuits only support 12V input and output, lack a lighting system, and are not convenient for use in low-light environments. Since existing medical protective helmets can only output 12V, and existing helmet lights usually use 3V power, a medical personal protective helmet driver circuit that solves the above problems is needed. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art by designing a driving circuit for a medical personal protective helmet.

[0005] To achieve the above objectives, the technical solution of this utility model is a driving circuit for a medical personal protective helmet, comprising a voltage input terminal, a fan driving module, a fan voltage output terminal, a microcontroller, an adjustable current feedback comparison circuit, a headlamp driving module, a headlamp voltage output terminal, and a fixed current feedback comparison circuit. The fan driving module is electrically connected to the voltage input terminal, and the fan driving module's output terminal is electrically connected to the fan voltage output terminal. The fan driving module is electrically connected to the output terminal of the microcontroller. The adjustable current feedback comparison circuit is electrically connected to the fan driving module, and its output terminal is connected to the microcontroller's input terminal. The headlamp driving module is electrically connected to the voltage input terminal, and its output terminal is electrically connected to the headlamp voltage output terminal. The headlamp driving module is electrically connected to the microcontroller's output terminal. The fixed current feedback comparison circuit is electrically connected to the headlamp driving module, and its output terminal is connected to the microcontroller's input terminal.

[0006] Furthermore, the adjustable current feedback comparison circuit includes a first current feedback module, a potentiometer, and a first voltage comparison circuit. The first current feedback module is electrically connected to the fan drive module. The potentiometer is electrically connected to the output terminal of the first current feedback module. The output terminal of the potentiometer is electrically connected to the first voltage comparison circuit. The output terminal of the first voltage comparison circuit is electrically connected to the microcontroller.

[0007] Furthermore, the fixed current feedback comparison circuit includes a second current feedback module and a second voltage comparison circuit. The second current feedback module is electrically connected to the headlamp drive module, the second voltage comparison circuit is electrically connected to the output terminal of the current feedback module, and the output terminal of the second voltage comparison circuit is electrically connected to the microcontroller.

[0008] Furthermore, the trigger threshold of the second voltage comparison circuit is less than or equal to 3V. Beneficial effects

[0009] This invention provides a driving circuit for a medical personal protective helmet, which has the following advantages: Through its structural design, the device receives voltage through a voltage input terminal. The fan drive module processes the voltage and outputs it through the fan voltage output terminal to supply the fan. An adjustable current feedback circuit collects the current from the fan drive module, which is then compared by an adjustable current feedback comparison circuit. If the current does not reach a set threshold, the microcontroller outputs power. The microcontroller reduces the duty cycle of pulse width modulation based on the received feedback signal until the voltage fed back by the current output by the fan drive module is lower than the set voltage threshold, thus achieving output. Simultaneously, the voltage input terminal supplies power to the headlamp drive module, which processes the voltage and supplies power to the headlamp voltage output terminal. A fixed current feedback comparison circuit compares the current collected from the headlamp drive module. If the current does not reach a set threshold, the microcontroller outputs power. The microcontroller reduces the duty cycle of pulse width modulation based on the received feedback signal until the voltage fed back by the current output by the fan drive module is lower than the set voltage threshold, thus achieving output. This solves the problem of existing technologies with only 12V output, which is inconvenient for headlamp mounting. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the drive circuit for the medical personal protective helmet described in this utility model.

[0011] In the diagram, 1 is the voltage input terminal; 2 is the fan driver module; 3 is the fan voltage output terminal; 4 is the microcontroller; 5 is the headlamp driver module; 6 is the headlamp voltage output terminal; 7 is the first current feedback module; 8 is the potentiometer; 9 is the first voltage comparator circuit; 10 is the second current feedback module; and 11 is the second voltage comparator circuit. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] In the description of this utility model, it should be noted that the terms "upper / lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0014] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "set / set up," "sleeve," "connection," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] Please see Figure 1 This utility model provides a technical solution: a driving circuit for a medical personal protective helmet, including a voltage input terminal 1, a fan driving module 2, a fan voltage output terminal 3, a microcontroller 4, an adjustable current feedback comparison circuit, a headlamp driving module 5, a headlamp voltage output terminal 6, and a fixed current feedback comparison circuit. The fan driving module 2 is electrically connected to the voltage input terminal 1, the fan voltage output terminal 3 is electrically connected to the output terminal of the fan driving module 2, the fan driving module 2 is electrically connected to the output terminal of the microcontroller 4, the adjustable current feedback comparison circuit is electrically connected to the fan driving module 2, the output terminal of the adjustable current feedback comparison circuit is connected to the input terminal of the microcontroller 4, the headlamp driving module 5 is electrically connected to the voltage input terminal 1, the headlamp voltage output terminal 6 is electrically connected to the headlamp driving module 5, the headlamp driving module 5 is electrically connected to the output terminal of the microcontroller 4, and the fixed current feedback comparison circuit is electrically connected to the headlamp driving module 5, the output terminal of the fixed current feedback comparison circuit is connected to the input terminal of the microcontroller 4.

[0016] In this invention, the adjustable current feedback comparison circuit includes a first current feedback module 7, a potentiometer 8, and a first voltage comparison circuit 9. The first current feedback module 7 is electrically connected to the fan drive module 2. The potentiometer 8 is electrically connected to the output terminal of the first current feedback module 7. The output terminal of the potentiometer 8 is electrically connected to the first voltage comparison circuit 9. The output terminal of the first voltage comparison circuit 9 is electrically connected to the microcontroller 4. In use, the first current feedback module 7 collects the current of the fan drive module 2, passes it through the potentiometer 8, and sends it to the first voltage comparison circuit 9 for comparison. By adjusting the potential of the potentiometer 8, the trigger voltage of the first voltage comparison circuit 7 can be adjusted, thereby realizing the output voltage regulation and control of the fan drive module 2.

[0017] In this invention, the fixed current feedback comparison circuit includes a second current feedback module 10 and a second voltage comparison circuit 11. The second current feedback module 10 is electrically connected to the headlamp drive module 5, and the second voltage comparison circuit 11 is electrically connected to the output terminal of the current feedback module. The output terminal of the second voltage comparison circuit 11 is electrically connected to the microcontroller 4. The second current feedback module 10 collects the current of the headlamp drive module 5. After comparison by the second voltage comparison circuit 11, when the voltage is less than the threshold of the second voltage comparison circuit 11, it stops sending signals to the microcontroller 4, and then the microcontroller 4 stops driving the headlamp drive module 5.

[0018] In this invention, the fan drive module 2 and the headlight drive module 5 are drive circuits equipped with PWM voltage regulation circuits, and the trigger threshold of the second voltage comparison circuit 11 is less than or equal to 3V.

[0019] Those skilled in the art should connect all electrical components and their compatible power supplies in this case with wires, and should select a suitable microcontroller 4 according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the working principle below, and complete the electrical connection by referring to the working sequence of each electrical component. The detailed connection method is a well-known technology in the art. The following mainly introduces the working principle and process, and will not explain the electrical control.

[0020] In this implementation plan:

[0021] Voltage is input through voltage input terminal 1. After processing the voltage, the fan drive module 2 outputs voltage through the fan voltage output terminal 3 to supply the fan. The current of the fan drive module 2 is collected by the adjustable current feedback circuit and compared by the adjustable current feedback comparison circuit. If the current does not reach the set threshold, the microcontroller 4 outputs a signal. The microcontroller 4 reduces the duty cycle of the pulse width modulation according to the received feedback signal until the voltage fed back by the current output by the fan drive module 2 is lower than the set voltage threshold, thus realizing the output. At the same time, voltage input terminal 1 supplies power to the headlamp drive module 5. After processing the voltage, the headlamp drive module 5 supplies power to the headlamp voltage output terminal 6. The fixed current feedback comparison circuit compares the current collected by the headlamp drive module 5. If the current does not reach the set threshold, the microcontroller 4 outputs a signal. The microcontroller 4 reduces the duty cycle of the pulse width modulation according to the received feedback signal until the voltage fed back by the current output by the fan drive module 2 is lower than the set voltage threshold, thus realizing the output. This solves the problem that the existing technology only has a 12V output, which is not convenient for headlamp mounting.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A driving circuit for a medical personal protective helmet, comprising a voltage input terminal (1), a fan driving module (2), a fan voltage output terminal (3), a microcontroller (4), an adjustable current feedback comparison circuit, a headlamp driving module (5), a headlamp voltage output terminal (6), and a fixed current feedback comparison circuit, characterized in that, The voltage input terminal (1) is electrically connected to a fan drive module (2), the output terminal of the fan drive module (2) is electrically connected to a fan voltage output terminal (3), the fan drive module (2) is electrically connected to the output terminal of the microcontroller (4), the fan drive module (2) is electrically connected to an adjustable current feedback comparison circuit, the output terminal of the adjustable current feedback comparison circuit is connected to the input terminal of the microcontroller (4), the voltage input terminal (1) is electrically connected to a headlamp drive module (5), the output terminal of the headlamp drive module (5) is electrically connected to a headlamp voltage output terminal (6), the headlamp drive module (5) is electrically connected to the output terminal of the microcontroller (4), the headlamp drive module (5) is electrically connected to a fixed current feedback comparison circuit, the output terminal of the fixed current feedback comparison circuit is connected to the input terminal of the microcontroller (4).

2. The medical personal protective helmet drive circuit according to claim 1, characterized in that, The adjustable current feedback comparison circuit includes a first current feedback module (7), a potentiometer (8), and a first voltage comparison circuit (9). The first current feedback module (7) is electrically connected to the fan drive module (2). The potentiometer (8) is electrically connected to the output terminal of the first current feedback module (7). The first voltage comparison circuit (9) is electrically connected to the output terminal of the potentiometer (8). The output terminal of the first voltage comparison circuit (9) is electrically connected to the microcontroller (4).

3. The medical personal protective helmet drive circuit according to claim 1, characterized in that, The fixed current feedback comparison circuit includes a second current feedback module (10) and a second voltage comparison circuit (11). The second current feedback module (10) is electrically connected to the headlamp drive module (5). The second voltage comparison circuit (11) is electrically connected to the output terminal of the current feedback module. The output terminal of the second voltage comparison circuit (11) is electrically connected to the microcontroller (4).

4. The medical personal protective helmet drive circuit according to claim 3, characterized in that, The trigger threshold of the second voltage comparison circuit (11) is less than or equal to 3V.

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