阅读说明：本技术 检测电路、旋钮、检测方法及电器 (Detection circuit, knob, detection method and electric appliance ) 是由 苏泽锋 于 2019-10-09 设计创作，主要内容包括：本发明提供了一种检测电路、旋钮、检测方法及电器,其中,所述检测电路包括发射电路和接收电路；发射电路的一端连接至第一信号源,发射电路的另一端连接至地端,发射电路用于产生检测信号；接收电路的一端与第二信号源以及地端相连接,接收电路的另一端根据接收到的检测信号输出电信号；发射电路的数量为至少一个,接收电路的数量为至少两个。根据发明的检测电路和包括该检测电路的旋钮,采用非接触式的检测方式,避免了旋钮的磨损,提高了旋钮调节的精确度。(The invention provides a detection circuit, a knob, a detection method and an electric appliance, wherein the detection circuit comprises a transmitting circuit and a receiving circuit; one end of the transmitting circuit is connected to a first signal source, the other end of the transmitting circuit is connected to the ground end, and the transmitting circuit is used for generating a detection signal; one end of the receiving circuit is connected with the second signal source and the ground end, and the other end of the receiving circuit outputs an electric signal according to the received detection signal; the number of the transmitting circuits is at least one, and the number of the receiving circuits is at least two. According to the detection circuit and the knob comprising the detection circuit, a non-contact detection mode is adopted, so that the abrasion of the knob is avoided, and the adjustment accuracy of the knob is improved.)

1. A detection circuit, comprising:

the device comprises a transmitting circuit, a first signal source, a second signal source and a detection circuit, wherein one end of the transmitting circuit is connected to the first signal source, the other end of the transmitting circuit is connected to the ground end, and the transmitting circuit is used for generating a detection signal;

one end of the receiving circuit is connected with a second signal source and a ground end, and the other end of the receiving circuit outputs an electric signal according to the received detection signal;

the number of the transmitting circuits is at least one, and the number of the receiving circuits is at least two.

2. The detection circuit of claim 1, wherein the transmit circuit comprises:

the input end of the transmitting element is connected with the first signal source, and the transmitting element is used for generating the detection signal;

and the output end of the transmitting element is connected with the ground end through the first resistive element.

3. The detection circuit of claim 2, wherein the receiving circuit comprises:

a receiving element, an input end of which is connected with the second signal source and a ground end, the receiving element being configured to receive the detection signal;

a first capacitive element, through which an input terminal of the receiving element is connected to the ground terminal;

the input end of the receiving element is connected with the second signal source through the second resistive element;

a third resistive element connected to an output terminal of the receiving element;

and the output end of the receiving element is connected with the ground end through the fourth resistive element.

4. A knob, comprising:

a body rotatable about a fixed axis;

the shielding piece is connected with the main body and rotates together with the main body;

detection means comprising a detection circuit according to any one of claims 1 to 3, for generating at least two electrical signals depending on the position of the shutter;

and the processing device is connected to the detection device and is used for determining the rotation direction of the knob according to the at least two electrical signals.

5. The knob according to claim 4, wherein said detecting means comprises:

the device comprises at least two detection signal receiving devices and corresponding detection signal generating devices, wherein the detection signal generating devices are used for generating detection signals, the at least two detection signal receiving devices generate at least two paths of electric signals according to the detection signals and the positions of the shielding piece, and the at least two detection signal receiving devices are arranged along the movement path of the shielding piece.

6. The knob according to claim 5,

the at least two detection signal receiving devices and the corresponding detection signal generating devices are respectively arranged on two sides of the shielding piece;

the shielding piece shields the detection signals sent by the detection signal generating device, and the detection device is used for generating the at least two paths of electric signals according to the sequence of shielding the at least two detection signal receiving devices.

7. The knob according to claim 5,

the detection signal generating device is arranged on the shielding piece and used for sending out a detection signal;

the detection device is used for generating at least two paths of electric signals according to the sequence of the detection signals received by the at least two detection signal receiving devices.

8. The knob according to any one of claims 5 to 7,

the distance value of two adjacent detection signal receiving devices on the moving path of the shielding piece is smaller than or equal to the length value of the shielding piece on the moving path of the shielding piece.

9. The knob according to claim 8,

the number of the shielding pieces is multiple, and the spacing distance value of the shielding pieces on the moving path of the shielding pieces is equal to the length value of the shielding pieces on the moving path of the shielding pieces.

10. The knob according to any one of claims 4 to 7, further comprising:

and the display device is connected to the processing device, the processing device is also used for generating gear adjustment information after receiving the at least two paths of electric signals, and the display device is used for adjusting the displayed gear of the knob according to the gear adjustment information.

11. A detection method for detecting a rotation direction of a knob, the detection method comprising:

generating at least two paths of electric signals according to the position of the shielding piece;

and determining the rotation direction of the knob according to the at least two electrical signals.

12. The detection method according to claim 11, wherein the step of generating at least two electrical signals according to the position of the shutter comprises in particular:

and generating the at least two paths of electric signals according to the sequence of the at least two detection signal receiving devices which are shielded.

13. The detection method according to claim 11, wherein the step of generating at least two electrical signals according to the position of the shutter comprises in particular:

and generating the at least two paths of electric signals according to the sequence of the detection signals received by the at least two detection signal receiving devices.

14. The method for detecting according to any one of claims 11 to 13, further comprising, after the step of determining the rotation direction of the knob according to the at least two electrical signals:

generating gear adjustment information according to the at least two paths of electric signals and the rotation direction of the knob;

and adjusting the displayed gear of the knob according to the gear adjusting information.

15. An electrical appliance, comprising:

the knob according to any one of claims 4 to 10.

Technical Field

The invention relates to the technical field of switches, in particular to a detection circuit, a knob, a detection method and an electric appliance.

Background

Most of the existing knob switches belong to switch knobs in physical connection, and are realized through mechanical contacts, and display bars are added or subtracted according to the directions of the knobs. The inside mechanical shrapnel contact formula that is of conventional coding switch, the direction of rotation is different, and the position of contact is just different to distinguish the direction, if the contact warp then can have the problem of erroneous judgement when carrying out the direction judgement in the assembly process, and need lubricating oil to guarantee not to warp for a long time work between the contact, thereby the problem that has the structure and intake then influence the lubrication action and cause the direction erroneous judgement. As shown in fig. 1, a conventional mechanical coding switch: c is GND (ground), A and B are different spring plates respectively, and the direction is determined by signals between A-C and B-C.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

Therefore, a first objective of the present invention is to provide a detection circuit.

A second object of the invention is to propose a knob.

A third object of the present invention is to provide a detection method.

A fourth object of the invention is to propose an electrical appliance.

In view of the above, according to a first object of the present invention, there is provided a detection circuit including a transmission circuit and a reception circuit; one end of the transmitting circuit is connected to a first signal source, the other end of the transmitting circuit is connected to the ground end, and the transmitting circuit is used for generating a detection signal; one end of the receiving circuit is connected with the second signal source and the ground end, and the other end of the receiving circuit outputs an electric signal according to the received detection signal; the number of the transmitting circuits is at least one, and the number of the receiving circuits is at least two.

The detection circuit provided by the invention comprises at least one transmitting circuit and at least two receiving circuits, wherein the transmitting circuit generates a detection signal, the receiving circuits output electric signals according to the detection signal, and the triggering state of a receiving element in the receiving circuits can be determined according to the electric signals output by the receiving circuits, so that the position of an object to be detected can be determined. The detection circuit comprises two receiving circuits, the position information of the detected object can be respectively obtained, and the position information of the detected object at different moments can be determined through electric signals sent by the receiving circuits at different moments, so that the movement direction of the detected object is determined. The detection circuit can realize non-contact detection of the movement direction of the detected object, and the detection circuit applied to the knob can replace the traditional mechanical switch contact, and the knob information (the rotation direction and the gear) is collected in a non-contact way without causing the abrasion of the knob.

In addition, the detection circuit in the above embodiment provided by the present invention may further have the following additional technical features:

in the above technical solution, the transmission circuit includes: the input end of the transmitting element is connected with a first signal source, and the transmitting element is used for generating a detection signal; and the output end of the transmitting element is connected with the ground end through the first resistive element.

In the technical scheme, the transmitting circuit comprises a transmitting element and a first resistive element, the transmitting element is used for transmitting a detection signal, the first resistive element is used for dividing voltage so that the transmitting element works under a rated voltage, and the resistance value of the first resistive element is determined according to actual use conditions.

In the above technical solution, the receiving circuit includes: the input end of the receiving element is connected with the second signal source and the ground end, and the receiving element is used for receiving the detection signal; the input end of the receiving element is connected with the ground end through the first capacitive element; the input end of the receiving element is connected with a second signal source through a second resistive element; a third resistive element connected to an output terminal of the receiving element; and the output end of the receiving element is connected with the ground end through the fourth resistive element.

In the technical scheme, the receiving circuit comprises a receiving element, a first capacitive element, a second resistive element, a third resistive element and a fourth resistive element, wherein the first capacitive element is used for filtering interference signals, the second resistive element plays a role in overcurrent protection, the third resistive element is used for pulling down a level, and the fourth resistive element is used for pulling up the level, so that the single chip microcomputer can identify output electric signals. The resistance values of the third resistive element and the fourth resistive element are determined according to actual use conditions.

According to a second object of the present invention, there is also provided a knob, comprising: a body rotatable about a fixed axis; the shielding piece is connected with the main body and rotates along with the main body; the detection device comprises a detection circuit according to any one of the technical schemes, and is used for generating at least two paths of electric signals according to the position of the shielding piece; and the processing device is connected to the detection device and used for determining the rotation direction of the knob according to the at least two paths of electric signals.

According to the knob provided by the second object of the invention, when the shielding piece rotates along with the main body, the detection signal received by the receiving circuit in the detection device can be changed, so that the electric signal output by the receiving circuit is changed, and according to at least two paths of electric signals output by the detection circuit, the processing device can determine the sequence of triggering the receiving circuits, so that the rotation direction of the shielding piece is determined, and further the rotation direction of the knob is determined.

In the above technical solution, the detection device includes: the device comprises at least two detection signal receiving devices and corresponding detection signal generating devices, wherein the detection signal generating devices are used for generating detection signals, the at least two detection signal receiving devices generate at least two paths of electric signals according to the detection signals and the position of the shielding piece, and the at least two detection signal receiving devices are arranged along the movement path of the shielding piece.

In the technical scheme, the detection device comprises at least two detection signal receiving devices and corresponding detection signal generating devices, a receiving circuit is arranged in each detection signal receiving device, a transmitting circuit is arranged in each detection signal generating device, when the shielding piece rotates along with the main body, the detection signals received by the detection signal receiving devices can change, so that the output electric signals are changed, the detection devices output at least two paths of electric signals, and the processing device determines the rotation direction of the shielding piece according to the at least two paths of electric signals, so that the rotation direction of the knob is determined. The detection signal generating device and the detection signal receiving device can be arranged in one-to-one correspondence, and the detection signal generating device and the detection signal receiving device can also be arranged in one-to-many correspondence.

In the technical scheme, at least two detection signal receiving devices and corresponding detection signal generating devices are respectively arranged on two sides of the shielding piece; the shielding piece shields the detection signals sent by the detection signal generating device, and the detection device is used for generating at least two paths of electric signals according to the sequence that the at least two detection signal receiving devices are shielded.

In the technical scheme, the detection signal receiving devices and the corresponding detection signal generating devices are respectively arranged on two sides of the shielding piece, therefore, when the shielding piece rotates between the detection signal receiving devices and the detection signal generating devices, the shielding piece shields the detection signals sent by the detection signal generating devices, the electric signals output by the shielded detection signal receiving devices can change, according to the change condition of the electric signals output by the detection signal receiving devices, the processing device can judge the sequence of the shielding piece passing through the detection signal receiving devices when the shielding piece rotates, so that the processing device judges the rotating direction of the shielding piece according to the changed electric signals, and the rotating direction of the knob is judged.

In the technical scheme, the detection signal generating device is arranged on the shielding piece and is used for sending out a detection signal; the detection device is used for generating at least two paths of electric signals according to the sequence of the detection signals received by the at least two detection signal receiving devices.

In the technical scheme, the detection signal generating device is arranged on the shielding piece and moves along with the shielding piece, so that when the shielding piece rotates to the relative position of one detection signal receiving device, the detection signal generating device on the shielding piece is located at the relative position of the detection signal receiving device, the detection signal receiving device can receive a detection signal sent by the detection signal generating device, the electric signal output by the detection signal receiving device can change, and according to the change condition of the electric signals output by the detection signal receiving devices, the processing device can judge the sequence of the detection signal receiving devices passing through the shielding piece when the shielding piece rotates, so that the processing device judges the rotating direction of the shielding piece according to the changed electric signal, and further judges the rotating direction of the knob.

In the above technical solution, the distance value of two adjacent detection signal receiving devices on the movement path of the shielding member is less than or equal to the length value of the shielding member on the movement path thereof.

In this technical scheme, the distance value of two adjacent detection signal receiving device on the motion path of shielding piece is less than or equal to the length value of shielding piece on its motion path, namely when the shielding piece moves to between two adjacent detection signal receiving device, two detection signal receiving device can be sheltered from simultaneously to the shielding piece to change the signal of telecommunication of detection signal receiving device output, the specific process that the shielding piece sheltered from detection signal receiving device is: only the first detection signal receiving means is blocked, while the first detection signal receiving means and the second detection signal receiving means are blocked, and only the second detection signal receiving means is blocked. If the first detection signal receiving device and the second detection signal receiving device are arranged clockwise, it can be determined that the rotation direction of the shielding member is clockwise, that is, the rotation direction of the knob is clockwise.

In the technical scheme, the number of the shielding pieces is multiple, and the spacing distance value of the plurality of shielding pieces on the moving path of the shielding pieces is equal to the length value of the shielding pieces on the moving path of the shielding pieces.

In the technical scheme, the number of the shielding pieces is multiple, and the spacing distance value of the plurality of shielding pieces on the moving path of the shielding pieces is equal to the length value of the shielding pieces on the moving path of the shielding pieces, so that the previous shielding piece is ensured to completely leave before the next shielding piece enters, interference among the plurality of shielding pieces is prevented, and interference is generated in the judgment of the rotating direction of the knob.

In the above technical solution, the knob further includes: and the display device is connected to the processing device, the processing device is also used for generating gear adjustment information after receiving the at least two paths of electric signals, and the display device is used for adjusting the gear of the displayed knob according to the gear adjustment information.

In the technical scheme, the knob further comprises a display device used for displaying the gear of the knob, the display device is connected to the processing device, the processing device generates gear adjustment information after receiving the electric signal sent by the detection device, and the display device adjusts the displayed gear. For example, when the appointment knob rotates clockwise, the gear is increased, when the appointment knob rotates anticlockwise, the gear is decreased, when the shielding piece rotates clockwise, the processing device determines that the rotation direction of the knob is clockwise according to an electric signal sent by the detection device, the processing device generates information for increasing one gear, and the display device increases the displayed gear by one gear according to the information. When the number of the shielding members is plural, the processing means generates a shift position adjustment information every time it receives an electric signal representing clockwise rotation of the shielding member.

According to a third object of the present invention, a detection method is also proposed, for a knob comprising a shutter, detection means and processing means, the detection method comprising: the detection device outputs at least two paths of electric signals according to the position of the shielding piece; the processing device determines the rotation direction of the knob according to the at least two paths of electric signals.

According to the detection method provided by the third object of the invention, the knob comprises the shielding piece, the detection device and the processing device, the detection device outputs at least two paths of electric signals according to the position of the shielding piece, when the shielding piece rotates along with the main body, the shielding piece is positioned at different positions, the detection signals received by the receiving circuit in the detection device can be changed, so that the electric signals output by the receiving circuit are changed, and according to the at least two paths of electric signals output by the detection circuit, the processing device can determine the sequence of triggering the plurality of receiving circuits, so that the positions of the shielding piece at different moments are determined, so that the rotation direction of the shielding piece is determined, and further the rotation direction of the knob.

In the above technical solution, the step of generating at least two electrical signals according to the position of the shielding member specifically includes: and generating at least two paths of electric signals according to the sequence of the at least two detection signal receiving devices which are shielded.

In the technical scheme, when the shielding piece rotates along with the main body, the detection signals received by the receiving circuit in the detection device can be changed, so that the electric signals output by the receiving circuit are changed, and according to at least two paths of electric signals output by the detection circuit, the processing device can determine the sequence of triggering the receiving circuits, so that the rotation direction of the shielding piece is determined, and further the rotation direction of the knob is determined. For example, when the at least two detection signal receiving devices and the corresponding detection signal generating devices are respectively arranged on two sides of the shielding piece, the received detection signals can be changed when the detection signal receiving devices are shielded by the shielding piece, so that the electrical signals output by the detection signal receiving devices can be changed, namely, the at least two electrical signals output by the detection device can be changed, the processing device determines the sequence of shielding the at least two detection signal receiving devices according to the at least two electrical signals, and determines the rotation direction of the knob according to the sequence of shielding the at least two detection signal receiving devices.

In the above technical solution, the step of generating at least two electrical signals according to the position of the shielding member specifically includes: and generating at least two paths of electric signals according to the sequence of the at least two detection signal receiving devices which are shielded.

In the technical scheme, when the shielding piece rotates along with the main body, the detection signals received by the receiving circuit in the detection device can be changed, so that the electric signals output by the receiving circuit are changed, and according to at least two paths of electric signals output by the detection circuit, the processing device can determine the sequence of triggering the receiving circuits, so that the rotation direction of the shielding piece is determined, and further the rotation direction of the knob is determined. For example, when the detection signal generating device is arranged on the shielding piece and moves together with the shielding piece, when the shielding piece rotates to the relative position of one detection signal receiving device, the detection signal generating device on the shielding piece is located at the relative position of the detection signal receiving device, the detection signal receiving device can receive the detection signal sent by the detection signal generating device, the electric signal output by the detection signal receiving device changes, and according to the change condition of the electric signals output by the detection signal receiving devices, the processing device can judge the sequence of the detection signal receiving devices passing through the shielding piece during rotation, so that the processing device can judge the rotation direction of the shielding piece according to the changed electric signals, and further judge the rotation direction of the knob.

In the above technical solution, after the step of determining the rotation direction of the knob by the processing device according to the at least two electrical signals, the method further includes: generating gear adjustment information according to the at least two paths of electric signals and the rotating direction of the knob; and adjusting the gear of the displayed knob according to the gear adjusting information.

In the technical scheme, the knob further comprises a display device, the display device is used for displaying the gear of the knob, the display device is connected to the processing device, the processing device generates gear adjustment information after receiving the electric signal sent by the detection device, and the display device adjusts the displayed gear. For example, when the appointment knob rotates clockwise, the gear is increased, when the appointment knob rotates anticlockwise, the gear is decreased, when the shielding piece rotates clockwise, the processing device determines that the rotation direction of the knob is clockwise according to an electric signal sent by the detection device, the processing device generates information for increasing one gear, and the display device increases the displayed gear by one gear according to the information. When the number of the shielding members is plural, the processing means generates a shift position adjustment information every time it receives an electric signal representing clockwise rotation of the shielding member.

According to a fourth object of the invention, an electrical appliance is also proposed, comprising a knob of the second object.

A fourth object of the present invention is to provide an electric appliance having all the advantages of the knob, since it includes the knob of the second object.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 illustrates a prior art mechanical coded switch;

FIG. 2 shows a schematic diagram of a detection circuit according to an embodiment of the invention;

FIG. 3 shows a partial schematic view of a knob according to one embodiment of the invention;

FIG. 4 shows a partial schematic view of a knob according to another embodiment of the invention;

FIG. 5 shows a partial schematic view of a knob according to yet another embodiment of the invention;

FIG. 6 shows a flow diagram of a detection method according to an embodiment of the invention;

FIG. 7 shows a flow diagram of a detection method according to another embodiment of the invention;

FIG. 8 shows a flow diagram of a detection method according to yet another embodiment of the invention;

FIG. 9 shows a flow diagram of a detection method according to yet another embodiment of the invention;

FIG. 10 shows a schematic block diagram of a knob circuit according to another embodiment of the present invention;

FIG. 11 shows a schematic diagram of a light-sensitive switch according to one embodiment of the present invention;

fig. 12 shows a schematic diagram of a light-sensitive switch according to another embodiment of the invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 2 to 5 is:

2 shielding piece, 4 detection signal generating device and 6 detection signal receiving device.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Detection circuits, knobs, detection methods, and appliances according to some embodiments of the invention are described below with reference to fig. 2-12.

As shown in fig. 2, a first object of the present invention provides a detection circuit, which includes a transmitting circuit and a receiving circuit; one end of the transmitting circuit is connected to a first signal source, the other end of the transmitting circuit is connected to the ground end, and the transmitting circuit is used for generating a detection signal; one end of the receiving circuit is connected with the second signal source and the ground end, and the other end of the receiving circuit outputs an electric signal according to the received detection signal; the number of the transmitting circuits is at least one, and the number of the receiving circuits is at least two.

The detection circuit provided by the invention comprises at least one transmitting circuit and at least two receiving circuits, wherein the transmitting circuit generates a detection signal, the receiving circuits output an electric signal according to the received detection signal, and the triggering state of the receiver can be determined according to the electric signal output by the receiving circuits, so that the position of an object to be detected can be determined.

The emitting element in the emitting circuit can be a light emitting element (such as a light emitting diode, an incandescent light bulb, etc.) for emitting a light signal, the receiving element in the receiving circuit can be a photoresistor or other photosensitive element, the emitting element and the receiving element are arranged oppositely, the detected object can block the light signal, when the detected object is positioned between the emitting element and the receiving element, the output electric signal of the corresponding receiving circuit changes, and the position of the detected object can be determined, the detecting circuit comprises two receiving circuits, the two receiving circuits comprise two receiving elements, the position information of the detected object can be respectively obtained, and the position information of the detected object at different moments can be determined through the electric signals emitted by the receiving circuits at different moments, so that the moving direction of the detected object can be determined.

The transmitting element and the two receiving elements may be integrated into one light sensitive switch Q1.

The transmitting element in the transmitting circuit can be a magnet, such as an electromagnet or a permanent magnet, the receiving element in the receiving circuit can be a hall element, and the detected object is an object capable of isolating a magnetic field.

The transmitting element may be an acoustic wave generating device and the receiving element in the receiving circuit may be an acoustic sensing element.

The transmitting element can be arranged on the detected object, when the detected object is positioned at the relative position of the receiving element, the transmitting element is opposite to the receiving element, and the output electric signal of the corresponding receiving circuit is changed, so that the position of the detected object can be determined.

In addition, the detection circuit in the above embodiment provided by the present invention may further have the following additional technical features:

in one embodiment of the invention, a transmit circuit comprises: the input end of the transmitting element is connected with a first signal source, and the transmitting element is used for generating a detection signal; and the output end of the transmitting element is connected with the ground end through the first resistive element.

In this embodiment, in this technical solution, the transmitting circuit includes a transmitting element and a first resistive element, the transmitting element is configured to transmit a detection signal, the first resistive element is configured to divide a voltage so that the transmitting element operates at a rated voltage, and a resistance value of the first resistive element is determined according to an actual use condition.

In one embodiment of the present invention, a receiving circuit includes: the input end of the receiving element is connected with the second signal source and the ground end, and the receiving element is used for receiving the detection signal; the input end of the receiving element is connected with the ground end through the first capacitive element; the input end of the receiving element is connected with a second signal source through a second resistive element; a third resistive element connected to an output terminal of the receiving element; and the output end of the receiving element is connected with the ground end through the fourth resistive element.

In this embodiment, the receiving circuit includes a receiving element, a first capacitive element, a second resistive element, a third resistive element, and a fourth resistive element, where the first capacitive element is used to filter an interference signal, the second resistive element plays a role in overcurrent protection, the third resistive element is used to pull down a level, and the fourth resistive element is used to pull up a level, so that the single chip microcomputer can identify an output electrical signal. The resistance values of the third resistive element and the fourth resistive element are determined according to actual use conditions.

According to a second object of the present invention, as shown in fig. 3 to 5, there is also proposed a knob comprising a body rotatable about a fixed axis; the shielding piece 2 is connected with the main body, and the shielding piece 2 rotates along with the main body; the detection device comprises a detection circuit according to any one of the technical schemes, and is used for outputting at least two paths of electric signals according to the position of the shielding piece 2; and the processing device is connected to the detection device and is used for receiving the at least two paths of electric signals and determining the rotation direction of the knob according to the at least two paths of electric signals.

According to the knob provided by the second object of the invention, when the shielding piece 2 rotates along with the main body, the detection signal received by the receiving circuit in the detection device can be changed, so that the electric signal output by the receiving circuit is changed, and according to at least two paths of electric signals output by the detection circuit, the processing device can determine the sequence of triggering the receiving circuits, so that the rotation direction of the shielding piece 2 is determined, and further the rotation direction of the knob is determined.

In one embodiment of the present invention, as shown in fig. 3 to 5, the detecting device includes: the device comprises at least two detection signal receiving devices 6 and corresponding detection signal generating devices 4, wherein the detection signal generating devices 4 are used for generating detection signals, the at least two detection signal receiving devices 6 output at least two paths of electric signals according to the detection signals and the position of the shielding piece 2, and the at least two detection signal receiving devices 6 are arranged along the movement path of the shielding piece 2; the processing device is used for determining the triggering sequence of the at least two detection signal receiving devices 6 according to the at least two electrical signals, and determining the rotating direction of the knob according to the triggering sequence of the at least two detection signal receiving devices 6.

In this embodiment, the detecting device includes at least two detecting signal receiving devices 6 and corresponding detecting signal generating devices 4, a receiving circuit is disposed in each detecting signal receiving device 6, a transmitting circuit is disposed in each detecting signal generating device 4, when the shielding member 2 rotates along with the main body, the detecting signal received by the detecting signal receiving device 6 changes, so as to change the output electric signal, the detecting device outputs at least two electric signals, and the processing device determines the rotation direction of the shielding member 2 according to the at least two electric signals, so as to determine the rotation direction of the knob. The detection signal generating device 4 and the detection signal receiving device 6 may be provided in one-to-one correspondence, or the detection signal generating device 4 and the detection signal receiving device 6 may be provided in one-to-many correspondence.

As shown in fig. 5, the detection signal generating device 4 and the two detection signal receiving devices 6 may be integrated into one photo switch Q1.

As shown in fig. 4, the emitting element in the detection signal generating device 4 may be replaced by a magnet, such as an electromagnet or a permanent magnet, the receiving elements in the two detection signal receiving devices 6 may be hall elements, and the detected object is an object capable of isolating the magnetic field.

The emitting element in the detection signal generating device 4 can be arranged on the detected object, when the detected object is located at the relative position of the receiving element in the detection signal receiving device 6, the emitting element is opposite to the receiving element, the output electric signal of the corresponding detection signal receiving device 6 is changed, and therefore the position of the detected object can be determined.

In one embodiment of the present invention, as shown in fig. 3 to 5, at least two detection signal receiving devices 6 and corresponding detection signal generating devices 4 are respectively disposed on both sides of the shielding member 2; the shielding piece 2 shields the detection signals sent by the detection signal generating device 4, the processing device is used for determining the sequence of shielding the at least two detection signal receiving devices 6 according to the at least two paths of electric signals, and the rotating direction of the knob is determined according to the sequence of shielding the at least two detection signal receiving devices 6.

In this embodiment, the detection signal receiving device 6 and the corresponding detection signal generating device 4 are respectively disposed on two sides of the shielding member 2, so that when the shielding member 2 rotates between the detection signal receiving device 6 and the detection signal generating device 4, the shielding member 2 shields the detection signal generated by the detection signal generating device 4, the electric signal output by the shielded detection signal receiving device 6 changes, and according to the change condition of the electric signals output by the plurality of detection signal receiving devices 6, the processing device can determine the sequence of passing through the plurality of detection signal receiving devices 6 when the shielding member 2 rotates, so that the processing device can determine the rotating direction of the shielding member 2 according to the changed electric signals, thereby determining the rotating direction of the knob.

In one embodiment of the invention, detection signal generating means 4 are provided on the shield 2, the detection signal generating means 4 being adapted to emit a detection signal; the processing device is used for determining the sequence of the detection signals received by the at least two detection signal receiving devices 6 according to the at least two paths of electric signals, and determining the rotation direction of the knob according to the sequence of the detection signals received by the at least two detection signal receiving devices 6.

In this embodiment, the detection signal generating device 4 is disposed on the shielding member 2 and moves together with the shielding member 2, so that when the shielding member 2 rotates to a relative position of one detection signal receiving device 6, the detection signal generating device 4 on the shielding member 2 is located at the relative position of the detection signal receiving device 6, the detection signal receiving device 6 can receive the detection signal sent by the detection signal generating device 4, the electrical signal output by the detection signal receiving device 6 changes, and according to the change of the electrical signals output by the detection signal receiving devices 6, the processing device can determine the sequence of passing through the detection signal receiving devices 6 when the shielding member 2 rotates, so that the processing device can determine the rotating direction of the shielding member 2 according to the changed electrical signal, thereby determining the rotating direction of the knob.

In one embodiment of the invention, as shown in figures 3 to 5, the distance value B of two adjacent detection signal receiving means 6 in the path of movement of the shutter 2 is less than or equal to the length value a of the shutter 2 in its path of movement.

In this embodiment, the distance value B between two adjacent detection signal receiving devices 6 in the moving path of the shielding member 2 is less than or equal to the length value a of the shielding member 2 in the moving path, that is, when the shielding member 2 moves to the middle of two adjacent detection signal receiving devices 6, the shielding member 2 can simultaneously shield two detection signal receiving devices 6, so as to change the electrical signals output by the detection signal receiving devices 6, and the specific process of shielding the detection signal receiving devices 6 by the shielding member 2 is as follows: only the first detection signal reception means 6 is blocked, while the first detection signal reception means 6 and the second detection signal reception means 6 are blocked, and only the second detection signal reception means 6 is blocked. If the first detection signal receiving means 6 and the second detection signal receiving means 6 are arranged clockwise, it can be determined that the rotation direction of the shutter 2 is clockwise, i.e. the rotation direction of the knob is clockwise. The distance value B of the detection signal receiving means 6 in the path of movement of the shutter 2 can be determined by the position of the receiving port from which the signal is received, as shown in fig. 3 and 4, B being the distance between adjacent receiving ports.

In one embodiment of the invention, the number of the blinders 2 is plural, and the plural blinders 2 are spaced apart in their movement paths by a distance value equal to the length value a of the blinder 2 in its movement path.

In this embodiment, the number of the shielding members 2 is plural, and the distance value between the plural shielding members 2 on the moving path thereof is equal to the length value a of the shielding member 2 on the moving path thereof, thereby ensuring that the previous shielding member is completely separated before the next shielding member enters, preventing interference between the plural shielding members, and interfering with the determination of the rotation direction of the knob.

In one embodiment of the present invention, the knob further comprises: and the display device is connected to the processing device, the processing device is also used for generating gear adjustment information after receiving the at least two paths of electric signals, and the display device is used for adjusting the gear of the displayed knob according to the gear adjustment information.

In this embodiment, the knob further comprises a display device for displaying the gear of the knob, the display device is connected to the processing device, the processing device generates gear adjustment information after receiving the electrical signal sent by the detection device, and the display device adjusts the displayed gear. For example, when the knob is appointed to rotate clockwise, the gear is increased, when the knob rotates anticlockwise, the gear is decreased, when the shielding piece 2 rotates clockwise, the processing device determines that the rotation direction of the knob is clockwise according to an electric signal sent by the detection device, the processing device generates information for increasing one gear, and the display device increases the displayed gear by one gear according to the information. When the number of the shade 2 is plural, the processing means generates a shift position adjustment information every time it receives an electric signal representing that the shade 2 is rotated clockwise.

According to a third object of the invention, fig. 6 shows a schematic flow chart of a detection method according to an embodiment of the invention.

As shown in fig. 6, the detection method is used for a knob, the knob comprises a shielding piece, a detection device and a processing device, and the detection method comprises the following steps:

s702, outputting at least two paths of electric signals according to the position of the shielding piece;

s704, determining the rotation direction of the knob according to the at least two electrical signals.

The detection method provided by the third object of the invention is that the knob comprises a shielding piece, a detection device and a processing device, the detection device outputs at least two paths of electric signals according to the position of the shielding piece, and when the shielding piece rotates along with the main body and passes through the detection device, the at least two paths of electric signals output by the detection device can be changed. Specifically, the shielding piece can change the detection signal received by the receiving circuit in the detection device, so that the electric signal output by the receiving circuit is changed, according to at least two paths of electric signals output by the detection circuit, the processing device can determine the triggered sequence of the receiving circuits, and further determine the positions of the shielding piece at different moments, so that the rotation direction of the shielding piece is determined, and further the rotation direction of the knob is determined.

In one embodiment of the present invention, as shown in fig. 7, the detection method includes:

s802, generating at least two paths of electric signals according to the sequence of the at least two detection signal receiving devices being shielded;

s804, the rotation direction of the knob is determined according to the at least two electrical signals.

In this embodiment, when the shielding element rotates with the main body, the detection signal received by the receiving circuit in the detection device is changed, so as to change the electrical signal output by the receiving circuit, and according to the at least two electrical signals output by the detection circuit, the processing device can determine the sequence in which the plurality of receiving circuits are triggered, so as to determine the rotation direction of the shielding element, and further determine the rotation direction of the knob. For example, when the at least two detection signal receiving devices and the corresponding detection signal generating devices are respectively arranged on two sides of the shielding piece, the received detection signals can be changed when the detection signal receiving devices are shielded by the shielding piece, so that the electrical signals output by the detection signal receiving devices can be changed, namely, the at least two electrical signals output by the detection device can be changed, the processing device determines the sequence of shielding the at least two detection signal receiving devices according to the at least two electrical signals, and determines the rotation direction of the knob according to the sequence of shielding the at least two detection signal receiving devices.

In one embodiment of the present invention, as shown in fig. 8, the detection method includes:

s902, generating at least two paths of electric signals according to the sequence of the at least two detection signal receiving devices being shielded;

and S904, determining the rotation direction of the knob according to the at least two electrical signals.

In this embodiment, when the shielding element rotates with the main body, the detection signal received by the receiving circuit in the detection device is changed, so as to change the electrical signal output by the receiving circuit, and according to the at least two electrical signals output by the detection circuit, the processing device can determine the sequence in which the plurality of receiving circuits are triggered, so as to determine the rotation direction of the shielding element, and further determine the rotation direction of the knob. For example, when the detection signal generating device is arranged on the shielding piece and moves together with the shielding piece, when the shielding piece rotates to the relative position of one detection signal receiving device, the detection signal generating device on the shielding piece is located at the relative position of the detection signal receiving device, the detection signal receiving device can receive the detection signal sent by the detection signal generating device, the electric signal output by the detection signal receiving device changes, and according to the change condition of the electric signals output by the detection signal receiving devices, the processing device can judge the sequence of the detection signal receiving devices passing through the shielding piece during rotation, so that the processing device can judge the rotation direction of the shielding piece according to the changed electric signals, and further judge the rotation direction of the knob.

In one embodiment of the present invention, as shown in fig. 9, the detection method includes:

s1002, outputting at least two paths of electric signals according to the position of the shielding piece;

s1004, determining the rotation direction of the knob according to the at least two paths of electric signals;

s1006, generating gear adjustment information according to the at least two electrical signals and the rotation direction of the knob;

and S1008, adjusting the gear of the displayed knob according to the gear adjusting information.

In this embodiment, the knob further comprises a display device for displaying the gear of the knob, the display device is connected to the processing device, the processing device generates gear adjustment information after receiving the electrical signal sent by the detection device, and the display device adjusts the displayed gear. For example, when the appointment knob rotates clockwise, the gear is increased, when the appointment knob rotates anticlockwise, the gear is decreased, when the shielding piece rotates clockwise, the processing device determines that the rotation direction of the knob is clockwise according to an electric signal sent by the detection device, the processing device generates information for increasing one gear, and the display device increases the displayed gear by one gear according to the information. When the number of the shielding members is plural, the processing means generates a shift position adjustment information every time it receives an electric signal representing clockwise rotation of the shielding member.

In an embodiment of the present application, as shown in fig. 10, the display device is a dot matrix LED display, the rotation direction of the knob is determined by the light sense switch, and then the Micro Control Unit (MCU) controls the gear according to the rotation direction of the knob, and makes the LED display the corresponding gear, and controls the on/off of the knob circuit by the on/off button.

In one embodiment of the present invention, as shown in fig. 2, 11 and 12, the electrical signal of the first signal source (4.4V) is a high level controlled by a Micro Control Unit (MCU), the signal source drives an emitter, and C and D are two signals of a receiving end input to the MCU for determining a direction. When the shelter does not pass through the light sensing switch Q1 in a normal state, the two connected chips (MOS) are both conducted, 5V generates high level on the resistors R6 and R4 through the MOS, and the high level is input into the MCU through C, D, and the MCU does not judge the direction at the moment. When the barrier passes the light sensitive switch from up (assuming forward direction) to down, the upper MOS transistor is not conducted, C is pulled down to low level by R4, the lower MOS is conducted, D is high level, and the barrier is determined to be forward direction. When the barrier passes the light sensitive switch from down (assuming reverse direction) to up, the lower MOS transistor is first turned off, D is pulled down to low level by R6, the upper MOS transistor is turned on, and C is also turned on, which is determined to be reverse. Wherein the resistance of R1 is 220 ohm (R), the resistance of R2 is 0 ohm, the resistances of R3 and R5 are 1 kiloohm, and the resistances of R4 and R6 are 10 kiloohm. The voltage drop of the emitter (light-emitting tube) is 1.2V, and the current on the emitter (light-emitting tube) is 14.5 mA. The capacity value of C1 is determined according to actual use conditions.

According to a fourth object of the invention, an electrical appliance is also proposed, comprising a knob of the second object.

A fourth object of the present invention is to provide an electric appliance having all the advantages of the knob, since it includes the knob of the second object.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.