CN220773155U

CN220773155U - Strong current detection circuit

Info

Publication number: CN220773155U
Application number: CN202321612408.5U
Authority: CN
Inventors: 陈家宇; 万利; 邓伟文; 项方; 张涛
Original assignee: Foshan Pdskyline Electronics Technology Co ltd
Current assignee: Foshan Pdskyline Electronics Technology Co ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2024-04-12
Anticipated expiration: 2033-06-21

Abstract

The utility model provides a strong current detection circuit which comprises a protection circuit, a current detection circuit, a display circuit and a chip identification circuit, wherein the protection circuit is connected with the current detection circuit, the current detection circuit is connected with the chip identification circuit, the chip identification circuit is connected with the display circuit, and the chip identification circuit can read the duration of the low level of the current detection circuit so as to identify the current of a strong current motor. Specifically, the strong current detection circuit is used for realizing the reading of the strong current and the return control after reading the value, and the strong current detection circuit can identify the current magnitude of the strong current passing through the motor by detecting the duration of the low level of the reading pin of the first control chip; when the strong direct current motor is in the process of using, if the degree of softness of dough needs to be controlled, namely the proportion of flour and water is identified, the magnitude of current flowing through the motor is identified in the using process of the strong direct current motor, and therefore the proportion of flour and water is approximately identified.

Description

Strong current detection circuit

Technical Field

The utility model relates to the technical field of circuits, in particular to a strong current detection circuit.

Background

The chef machine is mainly a multifunctional kitchen appliance which is used in the field of Chinese and Western style pastries and can knead dough, whisk eggs and stir. In the prior art, a user is usually required to stop and take a small part of dough to observe the softness of the dough, and if the dough is harder, the user is required to add water and then start up for stirring; if the dough is softer, the flour is adjusted, and the stirring is continued when the machine is started, so that certain inconvenience is brought to the user; and when the current of the strong direct current motor is overlarge or the rotating speed of the strong direct current motor is overlarge in certain scenes, the strong direct current motor is easy to work in overload to cause faults.

Therefore, further improvements are needed.

Disclosure of Invention

Based on the above, the utility model aims to provide a strong current detection circuit which overcomes the defects in the prior art, and the strong current detection circuit is used for identifying the current of a strong current passing through a motor, so that the proportion situation of flour and water is roughly identified, and a user can directly observe a display screen to adjust the proportion of the flour and the water.

The strong current detection circuit designed according to the purpose is characterized in that: the device comprises a protection circuit, a current detection circuit, a display circuit and a chip identification circuit, wherein the protection circuit is connected with the current detection circuit, the current detection circuit is connected with the chip identification circuit, the chip identification circuit is connected with the display circuit, and the chip identification circuit can read the low-level duration time of the current detection circuit so as to identify the current of a strong current motor.

The protection circuit comprises a current protective tube R-PTC1, the current detection circuit comprises an optocoupler U5, one end of the protective tube R-PTC1 is connected with one end of an input alternating current power supply, and the other end of the protective tube R-PTC1 is connected with the 4 pin of the optocoupler U5.

The chip identification circuit comprises a first control chip MCU1; the current detection circuit further comprises a triode Q3, a resistor R50, a resistor R51, a diode D10, a resistor R17, a resistor R46, a resistor R47, a cement resistor R48 and a cement resistor R49; the E pole of the triode Q3 is connected with one end of the resistor R51 and grounded, the C pole of the triode Q3 is connected with one end of the resistor R17, the other end of the resistor R17 is connected with the 18 pin of the first control chip MCU1, the B pole of the triode Q3 is connected with the other end of the resistor R51 and one end of the resistor R50, the other end of the resistor R50 is connected with the 2 pin of the optocoupler U5, the 1 pin of the optocoupler U5 is connected with a power supply +5V, the cathode of the diode D10, the resistor R47, the cement resistor R49 and one end of the cement resistor R48 are connected with the 4 pin of the optocoupler U5, the anode of the diode D10 and the other end of the resistor R47 are connected with the 3 pin of the optocoupler U5, and one end of the resistor R46 is connected with the 3 pin of the optocoupler U5, and the other end of the resistor R46 is connected with the cement resistor R49 and the other end of the cement resistor R48.

The optocoupler U5 is EL817; the triode Q3 is S8050; the diode D10 is M7; the protective tube R-PTC1 is GR265-250; the specification parameters of the cement resistor R48 and the cement resistor R49 are 10R/2W; the resistor R50 is 10K ohms; the resistor R51 is 30K ohms; the resistor R47 is 47K ohms; the resistor R46 is 1K ohms.

The display circuit comprises a resistor R12, a resistor R13, a display lamp LED1 and a display lamp LED2, wherein one end of the resistor R13 is connected with the display lamp LED1, one end of the resistor R12 is connected with the display lamp LED2, the other ends of the resistor R12 and the resistor R13 are connected with the 1 pin of the first control chip MCU1, the other end of the display lamp LED1 is connected with the 6 pin of the first control chip MCU1, and the other end of the display lamp LED2 is connected with the 5 pin of the first control chip MCU 1.

The display lamp LED1 is a green light emitting diode, the display lamp LED2 is a yellow light emitting diode, and the resistor R13 and the resistor R12 are both 510 ohms.

The chip identification circuit further comprises a capacitor C1 and an electrolytic capacitor EC2, wherein the negative electrode of the electrolytic capacitor EC2 and one end of the capacitor C1 are grounded, and the positive electrode of the electrolytic capacitor EC2 and the other end of the capacitor C1 are connected with a power supply +5V.

The first control chip MCU1 is PY32F003, the capacitor C1 is 0.1uF, and the electrolytic capacitor EC2 is 100uF/16V.

The strong current detection circuit further comprises a resistor R35 and a capacitor C3, one end of the resistor R35 is connected with the C pole of the triode Q3 and one end of the resistor R17, the other end of the resistor R35 is connected with a power supply +5V, the resistor R35 is connected with the 18 pin of the first control chip MCU1 through the resistor R17, one end of the capacitor C3 is connected with the other end of the resistor R17 and the 18 pin of the first control chip MCU1, and the other end of the capacitor C3 is grounded.

The chip identification circuit further comprises a burning module, the burning module comprises a socket CN2, the 1 pin of the socket CN2 is connected with the 11 pin of the first control chip MCU1, the 2 pin of the socket CN2 is grounded, the 3 pin of the socket CN2 is connected with 5V working voltage, and the 4 pin of the socket CN2 is connected with the 10 pin of the first control chip MCU 1.

The strong current detection circuit of the embodiment comprises a protection circuit, a current detection circuit, a display circuit and a chip identification circuit, wherein the protection circuit is connected with the current detection circuit, the current detection circuit is connected with the chip identification circuit, the chip identification circuit is connected with the display circuit, and the chip identification circuit can read the low-level duration time of the current detection circuit so as to identify the current of the strong current motor. Specifically, the strong current detection circuit is used for realizing the reading of the strong current and the return control after reading the value, and the strong current detection circuit can identify the current magnitude of the strong current passing through the motor by detecting the duration of the low level of the reading pin of the first control chip; when the strong current direct current motor is in use, if the degree of softness of dough is required to be controlled, namely the proportion of flour and water is identified, the current flowing through the motor is identified in the use process of the strong current direct current motor, so that the proportion of flour and water is roughly identified, a user can directly observe the proportion of flour and water through a display screen, and further the user can manually adjust the proportion of flour and water according to the proportion of flour and water displayed by the display screen, and meanwhile, a protection circuit is added to increase the condition of locked rotation or protect used products due to overlarge current in certain scenes; and the strong current detection is carried out, and meanwhile, the strong current detection is realized, the limitation on the strong current is made, and meanwhile, the fact that all components can be in a reasonable use range is also required to be ensured.

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 specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a circuit diagram of a strong current detection circuit according to an embodiment of the utility model.

Fig. 2 is a circuit diagram of a chip identification circuit according to an embodiment of the utility model.

Fig. 3 is a circuit diagram of a display circuit according to an embodiment of the utility model.

Fig. 4 is a circuit diagram of a burning module according to an embodiment of the utility model.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

As shown in fig. 1 to 4, a strong current detection circuit is provided, which comprises a protection circuit, a current detection circuit, a display circuit and a chip identification circuit, wherein the protection circuit is connected with the current detection circuit, the current detection circuit is connected with the chip identification circuit, the chip identification circuit is connected with the display circuit, and the chip identification circuit can read the low level duration time of the current detection circuit so as to identify the current magnitude of a strong current passing through a motor.

Specifically, the high current detection circuit is used for realizing the reading of the high current and the return control after reading the value, and the high current detection circuit can identify the current magnitude of the high current passing motor by detecting the duration of the low level of the reading pin of the first control chip MCU 1.

When the strong current direct current motor is in use, if the degree of softness of dough is required to be controlled, namely the proportion of flour and water is identified, the current flowing through the motor is required to be identified in the use process of the strong current direct current motor, so that the proportion of flour and water is approximately identified, a user can directly observe the proportion of flour and water through a display screen, and further the user can manually adjust the proportion of flour and water according to the proportion of flour and water displayed by the display screen, and meanwhile, a protection circuit is added to increase the condition of locked rotor or protect used products due to overlarge current in certain scenes; and the strong current detection is carried out, and meanwhile, the strong current detection is realized, the limitation on the strong current is made, and meanwhile, the fact that all components can be in a reasonable use range is also required to be ensured.

Further, as shown in fig. 1, the protection circuit includes a current fuse R-PTC1, the current detection circuit includes an optocoupler U5, one end of the fuse R-PTC1 is connected to one end of the input ac power, and the other end of the fuse R-PTC1 is connected to the 4 pin of the optocoupler U5.

Further, as shown in fig. 1 and 2, the chip recognition circuit includes a first control chip MCU1; the current detection circuit also comprises a triode Q3, a resistor R50, a resistor R51, a diode D10, a resistor R17, a resistor R46, a resistor R47, a cement resistor R48 and a cement resistor R49; the E pole of the triode Q3 is connected with one end of a resistor R51 and is grounded, the C pole of the triode Q3 is connected with one end of a resistor R17, the other end of the resistor R17 is connected with the 18 pin of a first control chip MCU1, the B pole of the triode Q3 is connected with the other end of the resistor R51 and one end of a resistor R50, the other end of the resistor R50 is connected with the 2 pin of an optocoupler U5, the 1 pin of the optocoupler U5 is connected with a power supply +5V, the cathode of a diode D10, a resistor R47, one end of a cement resistor R49 and one end of a cement resistor R48 are connected with the 4 pin of the optocoupler U5, the anode of a diode D10 and the other end of the resistor R47 are connected with the 3 pin of the optocoupler U5, and one end of the resistor R46 is connected with the 3 pin of the optocoupler U5, and the other end of the resistor R46 is connected with the cement resistor R49 and the other end of the cement resistor R48.

By adopting the arrangement, as long as the current is within the reasonable use range of the cement resistor, the first control chip MCU1 can read the current flowing through the optocoupler U5, the triode Q3 is conducted by judging the current flowing through the optocoupler U5, the signal read by the 18 pin of the first control chip is changed into low level due to the conduction of the triode Q3, the relation between AD and current intensity is accurately obtained by judging the time length of the low level, and the time length of the low level is judged on software, so that the control of the specifically required upper limit working current is realized.

Specifically, as the current changes, the brightness intensity of the optocoupler U5 will show a corresponding relationship with the current changes, so as to affect the conduction intensity of the triode Q3 formed by the 1 pin and the 4 pin of the optocoupler U5, when the 2 pin and the 3 pin flowing through the optocoupler U5 are forward voltages, the optocoupler U5 has brightness, and the brightness directly affects the output of the optocoupler U5, at this time, the 18 pin of the first control chip reads a low-level signal lasting for a period of time, when the 2 pin and the 3 pin flowing through the optocoupler U5 are reverse voltages, the current flows through the diode D10, at this time, the optocoupler U5 does not emit light, the output end of the optocoupler U5 has no voltage output, so the 18 pin of the first control chip is always pulled up to a high level by the resistor R35, and as the current increases, and when the 2 pin and the 3 pin flowing through the optocoupler U5 are forward voltages, the low-level signal read by the 18 pin of the first control chip will be longer, so as to recognize the current of the strong current part; the current flowing through the optocoupler U5 is composed of a cement resistor R48, a cement resistor R49, a resistor R47 and a resistor R46, the cement resistor R48 and the cement resistor R49 can generate lower voltage due to the current flowing through the motor, and meanwhile, the cement resistor R48 and the cement resistor R49 are in parallel connection with the optocoupler U5 and the resistor R46, the voltage at the moment is the voltage of the optocoupler U5 and the voltage of the resistor, and the voltage divided by the resistor is the current flowing through the optocoupler U5.

Further, the optocoupler U5 is EL817; triode Q3 is S8050; diode D10 is M7; the protective tube R-PTC1 is GR265-250; the specification parameters of the cement resistor R48 and the cement resistor R49 are 10R/2W; the resistance R50 is 10K ohms; resistor R51 is 30K ohms; resistor R47 is 47K ohms; resistor R46 is 1K ohms.

Further, as shown in fig. 2 and 3, the display circuit includes a resistor R12, a resistor R13, a display lamp LED1 and a display lamp LED2, one end of the resistor R13 is connected to the display lamp LED1, one end of the resistor R12 is connected to the display lamp LED2, the other ends of the resistor R12 and the resistor R13 are connected to the 1 pin of the first control chip MCU1, the other end of the display lamp LED1 is connected to the 6 pin of the first control chip MCU1, and the other end of the display lamp LED2 is connected to the 5 pin of the first control chip MCU 1.

Further, the display lamp LED1 is a green light emitting diode, the display lamp LED2 is a yellow light emitting diode, and the resistor R13 and the resistor R12 are both 510 ohms.

Further, as shown in fig. 2, the chip identification circuit further includes a capacitor C1 and an electrolytic capacitor EC2, wherein the negative electrode of the electrolytic capacitor EC2 and one end of the capacitor C1 are grounded, and the positive electrode of the electrolytic capacitor EC2 and the other end of the capacitor C1 are connected with a power supply +5v.

Further, the first control chip MCU1 is PY32F003, the capacitor C1 is 0.1uF, and the electrolytic capacitor EC2 is 100uF/16V.

Specifically, the 9 pin of the first control chip MCU1 is connected with +5V working voltage, and the 7 pin of the first control chip MCU1 is grounded; the 18 pin of the first control chip MCU1 is a signal reading pin.

Further, as shown in fig. 1 and 2, the heavy current detection circuit further includes a resistor R35 and a capacitor C3, one end of the resistor R35 is connected to the C pole of the triode Q3 and one end of the resistor R17, the other end of the resistor R35 is connected to the power +5v, the resistor R35 is connected to the 18 pin of the first control chip MCU1 through the resistor R17, one end of the capacitor C3 is connected to the other end of the resistor R17 and the 18 pin of the first control chip MCU1, and the other end of the capacitor C3 is grounded.

Further, as shown in fig. 4, the chip identification circuit further includes a burning module, the burning module includes a socket CN2, a 1 pin of the socket CN2 is connected with an 11 pin of the first control chip MCU1, a 2 pin of the socket CN2 is grounded, a 3 pin of the socket CN2 is connected with a 5V working voltage, and a 4 pin of the socket CN2 is connected with a 10 pin of the first control chip MCU 1.

Furthermore, the software architecture accords with the singlechip/embedded standard of the C51 standard;

further, the software program adopts a KEIL C51 compiler;

furthermore, the software program adopts C99 standard C language, which accords with the embedded version of the miniature hardware system;

furthermore, the software program standard accords with the single chip microcomputer/embedded architecture standard, the internal high-precision XTAL clock and the external interrupt control time sequence task, and the main function training service generates events and controls output.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

It will be further understood that when interpreting the connection or positional relationship of elements, although not explicitly described, the connection and positional relationship are to be interpreted as including the range of errors that should be within an acceptable range of deviations from the particular values as determined by those skilled in the art. For example, "about," "approximately," or "substantially" may mean within one or more standard deviations, and is not limited herein.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A strong current detection circuit is characterized in that: the device comprises a protection circuit, a current detection circuit, a display circuit and a chip identification circuit, wherein the protection circuit is connected with the current detection circuit, the current detection circuit is connected with the chip identification circuit, the chip identification circuit is connected with the display circuit, and the chip identification circuit can read the low-level duration time of the current detection circuit so as to identify the current of a strong current motor.

2. The heavy current detection circuit according to claim 1, wherein: the protection circuit comprises a current protective tube R-PTC1, the current detection circuit comprises an optocoupler U5, one end of the protective tube R-PTC1 is connected with one end of an input alternating current power supply, and the other end of the protective tube R-PTC1 is connected with the 4 pin of the optocoupler U5.

3. The heavy current detection circuit according to claim 2, wherein: the chip identification circuit comprises a first control chip MCU1; the current detection circuit further comprises a triode Q3, a resistor R50, a resistor R51, a diode D10, a resistor R17, a resistor R46, a resistor R47, a cement resistor R48 and a cement resistor R49; the E pole of the triode Q3 is connected with one end of the resistor R51 and grounded, the C pole of the triode Q3 is connected with one end of the resistor R17, the other end of the resistor R17 is connected with the 18 pin of the first control chip MCU1, the B pole of the triode Q3 is connected with the other end of the resistor R51 and one end of the resistor R50, the other end of the resistor R50 is connected with the 2 pin of the optocoupler U5, the 1 pin of the optocoupler U5 is connected with a power supply +5V, the cathode of the diode D10, the resistor R47, the cement resistor R49 and one end of the cement resistor R48 are connected with the 4 pin of the optocoupler U5, the anode of the diode D10 and the other end of the resistor R47 are connected with the 3 pin of the optocoupler U5, and one end of the resistor R46 is connected with the 3 pin of the optocoupler U5, and the other end of the resistor R46 is connected with the cement resistor R49 and the other end of the cement resistor R48.

4. A heavy current detection circuit according to claim 3, wherein: the optocoupler U5 is EL817; the triode Q3 is S8050; the diode D10 is M7; the protective tube R-PTC1 is GR265-250; the specification parameters of the cement resistor R48 and the cement resistor R49 are 10R/2W; the resistor R50 is 10K ohms; the resistor R51 is 30K ohms; the resistor R47 is 47K ohms; the resistor R46 is 1K ohms.

5. A heavy current detection circuit according to claim 3, wherein: the display circuit comprises a resistor R12, a resistor R13, a display lamp LED1 and a display lamp LED2, wherein one end of the resistor R13 is connected with the display lamp LED1, one end of the resistor R12 is connected with the display lamp LED2, the other ends of the resistor R12 and the resistor R13 are connected with the 1 pin of the first control chip MCU1, the other end of the display lamp LED1 is connected with the 6 pin of the first control chip MCU1, and the other end of the display lamp LED2 is connected with the 5 pin of the first control chip MCU 1.

6. The heavy current detection circuit according to claim 5, wherein: the display lamp LED1 is a green light emitting diode, the display lamp LED2 is a yellow light emitting diode, and the resistor R13 and the resistor R12 are both 510 ohms.

7. A heavy current detection circuit according to claim 3, wherein: the chip identification circuit further comprises a capacitor C1 and an electrolytic capacitor EC2, wherein the negative electrode of the electrolytic capacitor EC2 and one end of the capacitor C1 are grounded, and the positive electrode of the electrolytic capacitor EC2 and the other end of the capacitor C1 are connected with a power supply +5V.

8. The heavy current detection circuit of claim 7, wherein: the first control chip MCU1 is PY32F003, the capacitor C1 is 0.1uF, and the electrolytic capacitor EC2 is 100uF/16V.

9. A heavy current detection circuit according to claim 3, wherein: the strong current detection circuit further comprises a resistor R35 and a capacitor C3, one end of the resistor R35 is connected with the C pole of the triode Q3 and one end of the resistor R17, the other end of the resistor R35 is connected with a power supply +5V, the resistor R35 is connected with the 18 pin of the first control chip MCU1 through the resistor R17, one end of the capacitor C3 is connected with the other end of the resistor R17 and the 18 pin of the first control chip MCU1, and the other end of the capacitor C3 is grounded.

10. A heavy current detection circuit according to claim 3, wherein: the chip identification circuit further comprises a burning module, the burning module comprises a socket CN2, the 1 pin of the socket CN2 is connected with the 11 pin of the first control chip MCU1, the 2 pin of the socket CN2 is grounded, the 3 pin of the socket CN2 is connected with 5V working voltage, and the 4 pin of the socket CN2 is connected with the 10 pin of the first control chip MCU 1.