Detection circuit, knob, detection method and electrical appliance

Abstract

The present invention provides a detection circuit, a knob, a detection method and an electrical appliance, wherein the detection circuit 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 a ground terminal, and the transmitting circuit is used to generate a detection signal; one end of the receiving circuit is connected to a second signal source and a ground terminal, and the other end of the receiving circuit outputs an electrical signal according to the received detection signal; the number of the transmitting circuit is at least one, and the number of the receiving circuit is at least two. According to the detection circuit of the invention and the knob including the detection circuit, a non-contact detection method is adopted, which avoids the wear of the knob and improves the accuracy of knob adjustment.

Description

Technical Field

[0001] The present invention relates to the field of switch technology, and in particular to a detection circuit, a knob, a detection method and an electrical appliance. Background Art

[0002] Most of the existing knob switches are physically connected switch knobs, which are implemented through mechanical contacts and add or subtract display bars according to the direction of the knob. Conventional coding switches have mechanical spring contacts inside. The contact positions are different for different rotation directions, thus distinguishing the direction. If the contacts are deformed during assembly, there will be misjudgment when judging the direction. Lubricating oil is required between the contacts to ensure that they do not deform during long-term operation. If water enters the structure, the lubrication effect will be affected, resulting in misjudgment of the direction. Figure 1 As shown, it is a conventional mechanical coding switch: C is GND (ground terminal), A and B are different springs, and the direction is determined by the signal between AC and BC. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first object of the present invention is to provide a detection circuit.

[0005] A second object of the present invention is to provide a knob.

[0006] The third object of the present invention is to provide a detection method.

[0007] A fourth object of the present invention is to provide an electrical appliance.

[0008] In view of this, according to the first purpose of the present invention, the present invention provides a detection circuit, including a transmitting circuit and a receiving circuit; one end of the transmitting circuit is connected to a first signal source, and the other end of the transmitting circuit is connected to a ground terminal, and the transmitting circuit is used to generate a detection signal; one end of the receiving circuit is connected to a second signal source and the ground terminal, and the other end of the receiving circuit outputs an electrical signal according to the received detection signal; the number of transmitting circuits is at least one, and the number of receiving circuits is at least two.

[0009] The detection circuit provided by the present invention includes at least one transmitting circuit and at least two receiving circuits. The transmitting circuit generates a detection signal, and the receiving circuit outputs an electrical signal according to the detection signal. The trigger state of the receiving element in the receiving circuit can be determined according to the electrical signal output by the receiving circuit, thereby determining the position of the object to be detected. The detection circuit includes two receiving circuits, which can respectively obtain the position information of the object to be detected. The electrical signals sent by the receiving circuits at different times can be used to determine the position information of the object to be detected at different times, thereby determining the movement direction of the object to be detected. The detection circuit of the present invention can realize non-contact detection of the movement direction of the object to be detected. The detection circuit can be applied to the knob to replace the traditional mechanical switch contacts. This non-contact method of collecting knob information (rotation direction and gear position) will not cause wear of the knob.

[0010] In addition, the detection circuit in the above embodiment provided by the present invention may also have the following additional technical features:

[0011] In the above technical solution, the transmitting circuit includes: a transmitting element, whose input end is connected to the first signal source, and the transmitting element is used to generate a detection signal; a first resistive element, and the output end of the transmitting element is connected to the ground end through the first resistive element.

[0012] In this technical solution, the transmitting circuit includes a transmitting element and a first resistive element. The transmitting element is used to transmit a detection signal. The first resistive element is used to divide the voltage so that the transmitting element operates at a rated voltage. The resistance value of the first resistive element is determined according to actual usage.

[0013] In the above technical solution, the receiving circuit includes: a receiving element, whose input end is connected to the second signal source and the ground end, and the receiving element is used to receive the detection signal; a first capacitive element, the input end of the receiving element is connected to the ground end through the first capacitive element; a second resistive element, the input end of the receiving element is connected to the second signal source through the second resistive element; a third resistive element, connected to the output end of the receiving element; and a fourth resistive element, the output end of the receiving element is connected to the ground end through the fourth resistive element.

[0014] In this technical solution, the receiving circuit includes a receiving element, a first capacitive element, a second resistive element, a third resistive element and a fourth resistive element. The first capacitive element is used to filter out interference signals, the second resistive element plays a role of overcurrent protection, the third resistive element is used to pull down the level, and the fourth resistive element is used to pull up the level, so that the single chip microcomputer can identify the output electrical signal. The resistance values ​​of the third resistive element and the fourth resistive element are determined according to actual usage.

[0015] According to the second purpose of the present invention, a knob is also proposed, comprising: a main body, which can rotate around a fixed axis; a shielding member, which is connected to the main body and rotates with the main body; a detection device, which comprises a detection circuit such as any of the above technical solutions, and the detection device is used to generate at least two electrical signals according to the position of the shielding member; a processing device, which is connected to the detection device, and the processing device is used to determine the rotation direction of the knob according to the at least two electrical signals.

[0016] The second purpose of the present invention is to provide a knob in which the covering member, when rotating with the main body, will change the detection signal received by the receiving circuit in the detection device, thereby changing the electrical signal output by the receiving circuit. Based on at least two electrical signals output by the detection circuit, the processing device can determine the order in which multiple receiving circuits are triggered, thereby determining the rotation direction of the covering member, and then determining the rotation direction of the knob.

[0017] In the above technical solution, the detection device includes: at least two detection signal receiving devices and corresponding detection signal generating devices, the detection signal generating device is used to generate a detection signal, the at least two detection signal receiving devices generate at least two electrical signals according to the detection signal and the position of the shielding member, and the at least two detection signal receiving devices are arranged along the movement path of the shielding member.

[0018] In this technical solution, the detection device includes at least two detection signal receiving devices and corresponding detection signal generating devices, each detection signal receiving device is provided with a receiving circuit, and each detection signal generating device is provided with a transmitting circuit. When the shielding member rotates with the main body, the detection signal received by the detection signal receiving device will change, thereby changing the output electrical signal. The detection device outputs at least two electrical signals, and the processing device determines the rotation direction of the shielding member according to the at least two electrical signals, and then determines the rotation direction of the knob. The detection signal generating device and the detection signal receiving device can be set in a one-to-one correspondence, or the detection signal generating device and the detection signal receiving device can be set in a one-to-many correspondence.

[0019] In the above technical solution, at least two detection signal receiving devices and corresponding detection signal generating devices are respectively arranged on both sides of the shielding member; the shielding member blocks the detection signal emitted by the detection signal generating device, and the detection device is used to generate at least two electrical signals according to the order in which at least two detection signal receiving devices are blocked.

[0020] In this technical solution, the detection signal receiving device and the corresponding detection signal generating device are respectively arranged on both sides of the shielding member. Therefore, when the shielding member rotates between the detection signal receiving device and the detection signal generating device, the shielding member blocks the detection signal emitted by the detection signal generating device, and the electrical signal output by the blocked detection signal receiving device will change. According to the changes in the electrical signals output by the multiple detection signal receiving devices, the processing device can determine the order in which the shielding member passes through the multiple detection signal receiving devices when it rotates, so that the processing device can determine the direction of rotation of the shielding member according to the changed electrical signal, thereby determining the direction of rotation of the knob.

[0021] In the above technical solution, the detection signal generating device is arranged on the shielding member, and is used to send out a detection signal; the detection device is used to generate at least two electrical signals according to the order in which the detection signals are received by at least two detection signal receiving devices.

[0022] In this technical solution, the detection signal generating device is arranged on the shielding member and moves with the shielding member. Therefore, when the shielding member rotates to a relative position of a detection signal receiving device, the detection signal generating device on the shielding member is in a relative position of the detection signal receiving device. The detection signal receiving device can receive the detection signal emitted by the detection signal generating device. The electrical signal output by the detection signal receiving device will change. According to the changes in the electrical signals output by the multiple detection signal receiving devices, the processing device can determine the order in which the shielding member passes through the multiple detection signal receiving devices when it rotates, so that the processing device can determine the direction of rotation of the shielding member according to the changed electrical signal, thereby determining the direction of rotation of the knob.

[0023] In the above technical solution, the distance between two adjacent detection signal receiving devices on the moving path of the shielding member is less than or equal to the length of the shielding member on its moving path.

[0024] In this technical solution, the distance between two adjacent detection signal receiving devices on the moving path of the shield is less than or equal to the length of the shield on its moving path, that is, when the shield moves to the middle of two adjacent detection signal receiving devices, the shield can simultaneously block the two detection signal receiving devices, thereby changing the electrical signal output by the detection signal receiving devices. The specific process of the shield blocking the detection signal receiving device is: only block the first detection signal receiving device, block the first detection signal receiving device and the second detection signal receiving device at the same time, and only block the second detection signal receiving device. 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 shield is clockwise, that is, the rotation direction of the knob is clockwise.

[0025] In the above technical solution, there are multiple shielding members, and the spacing distance between the multiple shielding members on their movement paths is equal to the length of the shielding members on their movement paths.

[0026] In this technical solution, there are multiple shielding members, and the spacing distance between the multiple shielding members on their movement paths is equal to the length of the shielding members on their movement paths, thereby ensuring that the previous shielding member has completely left before the next shielding member enters, thereby preventing interference between the multiple shielding members and interfering with the determination of the direction of rotation of the knob.

[0027] In the above technical solution, the knob also includes: a display device connected to the processing device, the processing device is also used to generate gear adjustment information after receiving at least two electrical signals, and the display device is used to adjust the gear of the displayed knob according to the gear adjustment information.

[0028] In this technical solution, the knob also includes a display device for displaying the gear position of the knob. The display device is connected to the processing device. After receiving the electrical signal sent by the detection device, the processing device generates gear adjustment information, and the display device adjusts the displayed gear position. For example, it is agreed that the gear position increases when the knob is rotated clockwise, and decreases when it is rotated counterclockwise. When the shielding member rotates clockwise, the processing device determines that the rotation direction of the knob is clockwise according to the electrical signal sent by the detection device, and the processing device generates information for raising one gear position. The display device adjusts the displayed gear position up by one gear according to the information. When there are multiple shielding members, the processing device generates a gear adjustment information each time it receives an electrical signal representing the clockwise rotation of the shielding member.

[0029] According to the third purpose of the present invention, a detection method is also proposed for a knob, wherein the knob includes a covering member, a detection device and a processing device. The detection method includes: the detection device outputs at least two electrical signals according to the position of the covering member; and the processing device determines the rotation direction of the knob according to the at least two electrical signals.

[0030] The third purpose of the present invention provides a detection method, where the knob includes a covering member, a detection device and a processing device, where the detection device outputs at least two electrical signals according to the position of the covering member. When the covering member rotates with the main body, the covering member in different positions will change the detection signal received by the receiving circuit in the detection device, thereby changing the electrical signal output by the receiving circuit. Based on the at least two electrical signals output by the detection circuit, the processing device can determine the order in which multiple receiving circuits are triggered, and then determine the position of the covering member at different times, thereby determining the rotation direction of the covering member, and then determining the rotation direction of the knob.

[0031] In the above technical solution, the step of generating at least two electrical signals according to the position of the blocking member specifically includes: generating at least two electrical signals according to the order in which at least two detection signal receiving devices are blocked.

[0032] In this technical solution, when the shielding member rotates with the main body, it will change the detection signal received by the receiving circuit in the detection device, thereby changing the electrical signal output by the receiving circuit. According to the at least two electrical signals output by the detection circuit, the processing device can determine the order in which the multiple receiving circuits are triggered, thereby determining the rotation direction of the shielding member, and then determining the rotation direction of the knob. For example, when at least two detection signal receiving devices and corresponding detection signal generating devices are respectively arranged on both sides of the shielding member, since the detection signal receiving device will change the received detection signal when it is blocked by the shielding member, the electrical signal output by the detection signal receiving device will change, that is, at least two electrical signals output by the detection device will change. The processing device determines the order in which the at least two detection signal receiving devices are blocked according to the at least two electrical signals, and determines the rotation direction of the knob according to the order in which the at least two detection signal receiving devices are blocked.

[0033] In the above technical solution, the step of generating at least two electrical signals according to the position of the blocking member specifically includes: generating at least two electrical signals according to the order in which at least two detection signal receiving devices are blocked.

[0034] In this technical solution, when the shielding member rotates with the main body, it will change the detection signal received by the receiving circuit in the detection device, thereby changing the electrical signal output by the receiving circuit. According to at least two electrical signals output by the detection circuit, the processing device can determine the order in which the multiple receiving circuits are triggered, thereby determining the rotation direction of the shielding member, and then determining the rotation direction of the knob. For example, when the detection signal generating device is set on the shielding member and moves with the shielding member, therefore, when the shielding member rotates to a relative position of a detection signal receiving device, the detection signal generating device on the shielding member is in the relative position of the detection signal receiving device, and the detection signal receiving device can receive the detection signal sent by the detection signal generating device, and the electrical signal output by the detection signal receiving device will change. According to the changes in the electrical signals output by the multiple detection signal receiving devices, the processing device can determine the order in which the shielding member passes through the multiple detection signal receiving devices when rotating, so that the processing device determines the rotation direction of the shielding member according to the changed electrical signal, thereby determining the rotation direction of the knob.

[0035] In the above technical solution, after the processing device determines the rotation direction of the knob according to at least two electrical signals, it also includes: generating gear adjustment information according to at least two electrical signals and the rotation direction of the knob; adjusting the displayed gear of the knob according to the gear adjustment information.

[0036] In this technical solution, the knob also includes a display device, which is used to display the gear position of the knob. The display device is connected to a processing device. After receiving the electrical signal sent by the detection device, the processing device generates gear adjustment information, and the display device adjusts the displayed gear position. For example, it is agreed that the gear position increases when the knob is rotated clockwise, and decreases when it is rotated counterclockwise. When the shielding member rotates clockwise, the processing device determines that the rotation direction of the knob is clockwise based on the electrical signal sent by the detection device, and the processing device generates information for raising one gear position. The display device adjusts the displayed gear position up by one gear based on the information. When there are multiple shielding members, the processing device generates a gear adjustment information each time it receives an electrical signal representing the clockwise rotation of the shielding member.

[0037] According to the fourth object of the present invention, an electrical appliance is also provided, comprising the knob according to the second object.

[0038] The fourth object of the present invention provides an electrical appliance which includes the knob of the second object and thus has all the beneficial effects of the knob. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0040] Figure 1 An existing mechanical coding switch is shown;

[0041] Figure 2 A schematic diagram of a detection circuit according to an embodiment of the present invention is shown;

[0042] Figure 3 A partial schematic diagram of a knob according to an embodiment of the present invention is shown;

[0043] Figure 4 A partial schematic diagram of a knob according to another embodiment of the present invention is shown;

[0044] Figure 5 A partial schematic diagram of a knob according to yet another embodiment of the present invention is shown;

[0045] Figure 6 A flow chart of a detection method according to an embodiment of the present invention is shown;

[0046] Figure 7 A flow chart of a detection method according to another embodiment of the present invention is shown;

[0047] Figure 8 A flow chart of a detection method according to another embodiment of the present invention is shown;

[0048] Fig. 9A flow chart of a detection method according to another embodiment of the present invention is shown;

[0049] Fig.10 A schematic block diagram of a knob circuit according to another embodiment of the present invention is shown;

[0050] Fig.11 A schematic diagram of a light-sensing switch according to an embodiment of the present invention is shown;

[0051] Fig.12 A schematic diagram of a light-sensing switch according to another embodiment of the present invention is shown.

[0052] in, Figures 2 to 5 The corresponding relationship between the reference numerals and component names in the figure is:

[0053] 2 shielding member, 4 detection signal generating device, 6 detection signal receiving device. DETAILED DESCRIPTION

[0054] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0055] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0056] Refer to the following Figures 2 to 12 A detection circuit, a knob, a detection method and an electrical appliance according to some embodiments of the present invention are described.

[0057] like Figure 2 As shown, the first object of the present invention provides a detection circuit, including a transmitting circuit and a receiving circuit; one end of the transmitting circuit is connected to a first signal source, and the other end of the transmitting circuit is connected to a ground terminal, and the transmitting circuit is used to generate a detection signal; one end of the receiving circuit is connected to a second signal source and a ground terminal, and the other end of the receiving circuit outputs an electrical signal according to the received detection signal; the number of transmitting circuits is at least one, and the number of receiving circuits is at least two.

[0058] The detection circuit provided by the present invention includes at least one transmitting circuit and at least two receiving circuits. The transmitting circuit generates a detection signal, and the receiving circuit outputs an electrical signal according to the received detection signal. The trigger state of the receiver can be determined according to the electrical signal output by the receiving circuit, thereby determining the position of the detected object.

[0059] The transmitting element in the transmitting circuit can be a light-emitting element (such as a light-emitting diode, an incandescent bulb, etc.) used to emit a light signal, and the receiving element in the receiving circuit can be a photoresistor or other photosensitive element. The transmitting element and the receiving element are arranged opposite to each other, and the object to be detected can block the light signal. When the object to be detected is located between the transmitting element and the receiving element, the output electrical signal of the corresponding receiving circuit changes, and the position of the object to be detected can be determined. The detection circuit includes two receiving circuits and two receiving elements, which can respectively obtain the position information of the object to be detected. The electrical signals emitted by the receiving circuits at different times can be used to determine the position information of the object to be detected at different times, thereby determining the movement direction of the object to be detected.

[0060] The transmitting element and two receiving elements can be integrated into a photosensitive switch Q1.

[0061] The transmitting element in the transmitting circuit may be a magnet, such as an electromagnet or a permanent magnet, the receiving element in the receiving circuit may be a Hall element, and the detected object may be an object that can isolate the magnetic field.

[0062] The transmitting element may be a sound wave generating device, and the receiving element in the receiving circuit may be a sound sensing element.

[0063] The transmitting element can be set on the object to be detected. When the object to be detected is located at a relative position to the receiving element, the transmitting element is opposite to the receiving element, and the output electrical signal of the corresponding receiving circuit changes, thereby determining the position of the object to be detected.

[0064] In addition, the detection circuit in the above embodiment provided by the present invention may also have the following additional technical features:

[0065] In one embodiment of the present invention, the transmitting circuit includes: a transmitting element, whose input end is connected to the first signal source, and the transmitting element is used to generate a detection signal; a first resistive element, and the output end of the transmitting element is connected to the ground end through the first resistive element.

[0066] In this embodiment, in this technical solution, the transmitting circuit includes a transmitting element and a first resistive element, the transmitting element is used to transmit a detection signal, the first resistive element is used to divide the voltage so that the transmitting element operates at a rated voltage, and the resistance value of the first resistive element is determined according to actual usage.

[0067] In one embodiment of the present invention, the receiving circuit includes: a receiving element, whose input end is connected to the second signal source and the ground end, and the receiving element is used to receive the detection signal; a first capacitive element, the input end of the receiving element is connected to the ground end through the first capacitive element; a second resistive element, the input end of the receiving element is connected to the second signal source through the second resistive element; a third resistive element, connected to the output end of the receiving element; and a fourth resistive element, the output end of the receiving element is connected to the ground end through the fourth resistive element.

[0068] 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, the first capacitive element is used to filter out interference signals, the second resistive element plays a role of overcurrent protection, the third resistive element is used to pull down the level, and the fourth resistive element is used to pull up the level, so that the single chip microcomputer can identify the output electrical signal. The resistance values ​​of the third resistive element and the fourth resistive element are determined according to actual usage.

[0069] According to the second object of the present invention, Figures 3 to 5 As shown, a knob is also proposed, including a main body, which can rotate around a fixed axis; a shielding member 2, which is connected to the main body, and the shielding member 2 rotates together with the main body; a detection device, including a detection circuit such as any of the above technical solutions, and the detection device is used to output at least two electrical signals according to the position of the shielding member 2; a processing device, which is connected to the detection device, and the processing device is used to receive at least two electrical signals and determine the rotation direction of the knob according to the at least two electrical signals.

[0070] The second purpose of the present invention is to provide a knob in which the shielding member 2, when rotating with the main body, will change the detection signal received by the receiving circuit in the detection device, thereby changing the electrical signal output by the receiving circuit. Based on at least two electrical signals output by the detection circuit, the processing device can determine the order in which multiple receiving circuits are triggered, thereby determining the rotation direction of the shielding member 2, and then determining the rotation direction of the knob.

[0071] In one embodiment of the present invention, Figures 3 to 5 As shown, the detection device includes: at least two detection signal receiving devices 6 and corresponding detection signal generating devices 4, the detection signal generating device 4 is used to generate a detection signal, the at least two detection signal receiving devices 6 output at least two electrical signals according to the detection signal and the position of the shielding member 2, and the at least two detection signal receiving devices 6 are arranged along the movement path of the shielding member 2; the processing device is used to determine the order in which the at least two detection signal receiving devices 6 are triggered according to the at least two electrical signals, and determine the rotation direction of the knob according to the order in which the at least two detection signal receiving devices 6 are triggered.

[0072] In this embodiment, the detection device includes at least two detection signal receiving devices 6 and corresponding detection signal generating devices 4, each detection signal receiving device 6 is provided with a receiving circuit, and each detection signal generating device 4 is provided with a transmitting circuit. When the shielding member 2 rotates with the main body, the detection signal received by the detection signal receiving device 6 will change, thereby changing the output electrical signal. The detection device outputs at least two electrical signals, and the processing device determines the rotation direction of the shielding member 2 according to the at least two electrical signals, and then determines the rotation direction of the knob. The detection signal generating device 4 and the detection signal receiving device 6 can be set in a one-to-one correspondence, or the detection signal generating device 4 and the detection signal receiving device 6 can be set in a one-to-many manner.

[0073] like Figure 5 As shown, the detection signal generating device 4 and the two detection signal receiving devices 6 can be integrated into a light sensing switch Q1.

[0074] like Figure 4 As shown, the transmitting element in the detection signal generating device 4 can be replaced by a magnet, such as an electromagnet or a permanent magnet, the receiving elements in the two detection signal receiving devices 6 can be Hall elements, and the detected object is an object that can isolate the magnetic field.

[0075] The transmitting element in the detection signal generating device 4 can be set on the object to be detected. When the object to be detected is located at the relative position of the receiving element in the detection signal receiving device 6, the transmitting element is opposite to the receiving element, and the output electrical signal of the corresponding detection signal receiving device 6 changes, thereby determining the position of the object to be detected.

[0076] In one embodiment of the present invention, Figures 3 to 5 As shown, at least two detection signal receiving devices 6 and corresponding detection signal generating devices 4 are respectively arranged on both sides of the shielding member 2; the shielding member 2 blocks the detection signal emitted by the detection signal generating device 4, and the processing device is used to determine the order in which at least two detection signal receiving devices 6 are blocked according to at least two electrical signals, and determine the rotation direction of the knob according to the order in which at least two detection signal receiving devices 6 are blocked.

[0077] In this embodiment, the detection signal receiving device 6 and the corresponding detection signal generating device 4 are respectively arranged on both sides of the shielding member 2. Therefore, when the shielding member 2 rotates to between the detection signal receiving device 6 and the detection signal generating device 4, the shielding member 2 blocks the detection signal emitted by the detection signal generating device 4, and the electrical signal output by the blocked detection signal receiving device 6 will change. According to the changes in the electrical signals output by the multiple detection signal receiving devices 6, the processing device can determine the order in which the shielding member 2 passes through the multiple detection signal receiving devices 6 when it rotates, so that the processing device can determine the rotation direction of the shielding member 2 according to the changed electrical signal, thereby determining the rotation direction of the knob.

[0078] In one embodiment of the present invention, a detection signal generating device 4 is disposed on the shielding member 2, and the detection signal generating device 4 is used to emit a detection signal; the processing device is used to determine the order in which at least two detection signal receiving devices 6 receive the detection signals based on at least two electrical signals, and determine the rotation direction of the knob based on the order in which at least two detection signal receiving devices 6 receive the detection signals.

[0079] In this embodiment, the detection signal generating device 4 is arranged on the shielding member 2 and moves with the shielding member 2. Therefore, when the shielding member 2 rotates to a relative position of a detection signal receiving device 6, the detection signal generating device 4 on the shielding member 2 is in a relative position of the detection signal receiving device 6. The detection signal receiving device 6 can receive the detection signal emitted by the detection signal generating device 4. The electrical signal output by the detection signal receiving device 6 will change. According to the changes in the electrical signals output by the multiple detection signal receiving devices 6, the processing device can determine the order in which the shielding member 2 passes through the multiple detection signal receiving devices 6 when it rotates, so that the processing device can determine the rotation direction of the shielding member 2 according to the changed electrical signal, thereby determining the rotation direction of the knob.

[0080] In one embodiment of the present invention, Figures 3 to 5 As shown, the distance value B between two adjacent detection signal receiving devices 6 on the moving path of the shielding member 2 is less than or equal to the length value A of the shielding member 2 on its moving path.

[0081] In this embodiment, the distance value B between two adjacent detection signal receiving devices 6 on the movement path of the shielding member 2 is less than or equal to the length value A of the shielding member 2 on its movement 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 block the two detection signal receiving devices 6, thereby changing the electrical signal output by the detection signal receiving devices 6. The specific process of the shielding member 2 blocking the detection signal receiving devices 6 is: only blocking the first detection signal receiving device 6, blocking the first detection signal receiving device 6 and the second detection signal receiving device 6 at the same time, and only blocking the second detection signal receiving device 6. If the first detection signal receiving device 6 and the second detection signal receiving device 6 are arranged in a clockwise direction, it can be determined that the rotation direction of the shielding member 2 is clockwise, that is, the rotation direction of the knob is clockwise. Among them, the distance value B of the detection signal receiving device 6 on the movement path of the shielding member 2 can be determined by the position of the receiving port of the receiving signal, such as Figure 3 and Figure 4 As shown, B is the distance between adjacent receiving ports.

[0082] In one embodiment of the present invention, there are multiple shielding members 2, and the spacing value between the multiple shielding members 2 on their moving paths is equal to the length value A of the shielding member 2 on its moving path.

[0083] In this embodiment, there are multiple shielding members 2, and the spacing value of the multiple shielding members 2 on their movement path is equal to the length value A of the shielding member 2 on its movement path, thereby ensuring that the previous shielding member has completely left before the next shielding member enters, preventing interference between the multiple shielding members and interfering with the determination of the rotation direction of the knob.

[0084] In one embodiment of the present invention, the knob also includes: a display device connected to the processing device, the processing device is also used to generate gear adjustment information after receiving at least two electrical signals, and the display device is used to adjust the gear of the displayed knob according to the gear adjustment information.

[0085] In this embodiment, the knob also includes a display device for displaying the gear position of the knob. The display device is connected to the processing device. After receiving the electrical signal sent by the detection device, the processing device generates gear adjustment information, and the display device adjusts the displayed gear position. For example, it is agreed that the gear position increases when the knob is rotated clockwise, and decreases when it is rotated counterclockwise. When the shielding member 2 rotates clockwise, the processing device determines that the rotation direction of the knob is clockwise according to the electrical signal sent by the detection device, and the processing device generates information for raising one gear position. The display device adjusts the displayed gear position up by one gear according to the information. When there are multiple shielding members 2, the processing device generates a gear adjustment information each time it receives an electrical signal representing that the shielding member 2 rotates clockwise.

[0086] According to the third object of the present invention, Figure 6 A schematic flow chart of a detection method according to an embodiment of the present invention is shown.

[0087] like Figure 6 As shown, the detection method is used for a knob, the knob includes a shielding member, a detection device and a processing device, and the detection method includes:

[0088] S702, outputting at least two electrical signals according to the position of the shielding element;

[0089] S704: Determine the rotation direction of the knob according to at least two electrical signals.

[0090] The third object of the present invention provides a detection method, wherein the knob includes a shielding member, a detection device, and a processing device. The detection device outputs at least two electrical signals according to the position of the shielding member. When the shielding member rotates with the main body, when the shielding member passes through the detection device, it will change the at least two electrical signals output by the detection device. Specifically, the shielding member will change the detection signal received by the receiving circuit in the detection device, thereby changing the electrical signal output by the receiving circuit. According to the at least two electrical signals output by the detection circuit, the processing device can determine the order in which multiple receiving circuits are triggered, and then determine the position of the shielding member at different times, thereby determining the rotation direction of the shielding member, and then determining the rotation direction of the knob.

[0091] In one embodiment of the present invention, Figure 7 As shown, the detection method includes:

[0092] S802, generating at least two electrical signals according to the order in which at least two detection signal receiving devices are blocked;

[0093] S804: Determine the rotation direction of the knob according to at least two electrical signals.

[0094] In this embodiment, when the shielding member rotates with the main body, it will change the detection signal received by the receiving circuit in the detection device, thereby changing the electrical signal output by the receiving circuit. According to the at least two electrical signals output by the detection circuit, the processing device can determine the order in which the multiple receiving circuits are triggered, thereby determining the rotation direction of the shielding member, and then determining the rotation direction of the knob. For example, when at least two detection signal receiving devices and corresponding detection signal generating devices are respectively arranged on both sides of the shielding member, since the detection signal receiving device will change the received detection signal when it is blocked by the shielding member, the electrical signal output by the detection signal receiving device will change, that is, at least two electrical signals output by the detection device will change. The processing device determines the order in which the at least two detection signal receiving devices are blocked according to the at least two electrical signals, and determines the rotation direction of the knob according to the order in which the at least two detection signal receiving devices are blocked.

[0095] In one embodiment of the present invention, Figure 8 As shown, the detection method includes:

[0096] S902, generating at least two electrical signals according to the order in which at least two detection signal receiving devices are blocked;

[0097] S904: Determine the rotation direction of the knob according to at least two electrical signals.

[0098] In this embodiment, when the shielding member rotates with the main body, it will change the detection signal received by the receiving circuit in the detection device, thereby changing the electrical signal output by the receiving circuit. According to at least two electrical signals output by the detection circuit, the processing device can determine the order in which the multiple receiving circuits are triggered, thereby determining the rotation direction of the shielding member, and then determining the rotation direction of the knob. For example, when the detection signal generating device is set on the shielding member and moves with the shielding member, therefore, when the shielding member rotates to a relative position of a detection signal receiving device, the detection signal generating device on the shielding member is at the relative position of the detection signal receiving device, and the detection signal receiving device can receive the detection signal sent by the detection signal generating device, and the electrical signal output by the detection signal receiving device will change. According to the changes in the electrical signals output by the multiple detection signal receiving devices, the processing device can determine the order in which the shielding member passes through the multiple detection signal receiving devices when rotating, so that the processing device determines the rotation direction of the shielding member according to the changed electrical signal, thereby determining the rotation direction of the knob.

[0099] In one embodiment of the present invention, Fig. 9 As shown, the detection method includes:

[0100] S1002, outputting at least two electrical signals according to the position of the shielding element;

[0101] S1004, determining a rotation direction of the knob according to at least two electrical signals;

[0102] S1006, generating gear adjustment information according to at least two electrical signals and the rotation direction of the knob;

[0103] S1008, adjusting the gear position of the displayed knob according to the gear position adjustment information.

[0104] In this embodiment, the knob also includes a display device, and the display device is used to display the gear position of the knob. The display device is connected to the processing device. After receiving the electrical signal sent by the detection device, the processing device generates gear adjustment information, and the display device adjusts the displayed gear position. For example, it is agreed that the gear position increases when the knob is rotated clockwise, and decreases when it is rotated counterclockwise. When the shielding member rotates clockwise, the processing device determines that the rotation direction of the knob is clockwise based on the electrical signal sent by the detection device, and the processing device generates information to increase one gear position. The display device adjusts the displayed gear position up by one gear based on the information. When there are multiple shielding members, the processing device generates a gear adjustment information each time it receives an electrical signal representing the clockwise rotation of the shielding member.

[0105] In one embodiment of the present application, Fig.10As shown, the display device is a dot matrix LED display. The rotation direction of the knob is determined by a light-sensing switch. Then the microcontroller unit (MCU) controls the gear position according to the rotation direction of the knob, and makes the LED display display the corresponding gear position. The on / off of the knob circuit is controlled by the power button.

[0106] In one embodiment of the present invention, Figure 2 , Fig.11 and Fig.12 As shown, the electrical signal of the first signal source (4.4V) is a high level output controlled by the microcontroller unit (MCU). The signal source drives the emitter. C and D are two signals at the receiving end input to the MCU for determining the direction. In normal state, when the obstruction does not pass through the light-sensing switch Q1, both chips (MOS) are turned on, and 5V passes through the MOS to generate a high level on the resistors R6 and R4, which is input to the MCU through C and D. At this time, the MCU does not determine the direction. When the obstruction passes through the light-sensing switch from top to bottom (assuming it is forward), the upper MOS tube is not turned on first, and C is pulled down to a low level by R4. At this time, the lower MOS is still turned on, and D is still at a high level. At this time, it is judged to be forward. When the obstruction passes through the light-sensing switch from bottom to top (assuming it is reverse), the lower MOS tube is not turned on first, and D is pulled down to a low level by R6. At this time, the upper MOS is still turned on, and C is still at a high level. At this time, it is judged to be reverse. Among them, the resistance of R1 is 220 ohms (R), the resistance of R2 is 0 ohms, the resistance of R3 and R5 is 1 kilo ohms, and the resistance of R4 and R6 is 10 kilo ohms. 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 capacitance of C1 is determined according to the actual usage.

[0107] According to the fourth object of the present invention, an electrical appliance is also provided, comprising the knob according to the second object.

[0108] The fourth object of the present invention provides an electrical appliance which includes the knob of the second object and thus has all the beneficial effects of the knob.

[0109] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0110] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0111] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0112] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0113] It should be noted that in the claims, any reference signs placed between brackets shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention may be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0114] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0115] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A detection circuit, characterized in that: Used for a knob, the knob comprising a main body, a shielding member and a detection device, the main body being rotatable around a fixed axis; the shielding member being connected to the main body, and the shielding member rotating together with the main body; The detection device includes the detection circuit, and the detection circuit includes: A transmitting circuit, one end of which is connected to a first signal source, the other end of which is connected to a ground, and the transmitting circuit is used to generate a detection signal; A receiving circuit, one end of which is connected to a second signal source and a ground end, and the other end of which outputs an electrical signal according to the received detection signal; The number of the transmitting circuit is at least one, and the number of the receiving circuit is at least two; The receiving circuit outputs at least two paths of the electrical signals according to the position of the shielding element; Determining the rotation direction of the knob through at least two electrical signals; The detection device includes a detection signal receiving device; The step of the receiving circuit outputting at least two paths of the electrical signals according to the position of the shielding element specifically includes: Generate the at least two paths of the electrical signals according to the order in which at least two of the detection signal receiving devices are blocked; or The at least two electrical signals are generated according to the order in which the at least two detection signal receiving devices receive the detection signals.

2. The detection circuit according to claim 1, characterized in that: The transmitting circuit comprises: An emitting element, whose input end is connected to the first signal source, and the emitting element is used to generate the detection signal; A first resistive element, the output end of the emitting element is connected to the ground end through the first resistive element.

3. The detection circuit according to claim 2, characterized in that: The receiving circuit comprises: A receiving element, whose input end is connected to the second signal source and a ground end, and the receiving element is used to receive the detection signal; A first capacitive element, the input end of the receiving element is connected to the ground end through the first capacitive element; a second resistive element, wherein the input end of the receiving element is connected to the second signal source through the second resistive element; a third resistive element connected to the output end of the receiving element; A fourth resistive element, wherein the output end of the receiving element is connected to the ground end through the fourth resistive element.

4. A knob, characterized in that: include: A main body, rotatable about a fixed axis; A shielding member connected to the main body, wherein the shielding member rotates together with the main body; A detection device, comprising a detection circuit as claimed in any one of claims 1 to 3, wherein the detection device is used to generate at least two electrical signals according to the position of the shielding member; A processing device is connected to the detection device, and is used to determine the rotation direction of the knob according to the at least two electrical signals.

5. The knob according to claim 4, characterized in that: The detection device comprises: At least two detection signal receiving devices and corresponding detection signal generating devices, the detection signal generating device is used to generate a detection signal, the at least two detection signal receiving devices generate the at least two electrical signals according to the detection signal and the position of the shielding member, and the at least two detection signal receiving devices are arranged along the movement path of the shielding member.

6. The knob according to claim 5, characterized in that: The at least two detection signal receiving devices and the corresponding detection signal generating devices are respectively arranged on both sides of the shielding member; The shielding member shields the detection signal emitted by the detection signal generating device, and the detection device is used to generate the at least two electrical signals according to the order in which the at least two detection signal receiving devices are shielded.

7. The knob according to claim 5, characterized in that: The detection signal generating device is arranged on the shielding member, and the detection signal generating device is used to generate a detection signal; The detection device is used to generate at least two electrical signals according to the order in which the at least two detection signal receiving devices receive the detection signals.

8. The knob according to any one of claims 5 to 7, characterized in that: The distance between two adjacent detection signal receiving devices on the moving path of the shielding member is less than or equal to the length of the shielding member on its moving path.

9. The knob according to claim 8, characterized in that: There are multiple shielding members, and the spacing distance between the multiple shielding members on their movement paths is equal to the length of the shielding members on their movement paths.

10. The knob according to any one of claims 4 to 7, characterized in that: Also includes: The display device is connected to the processing device, and the processing device is further used to generate gear adjustment information after receiving the at least two electrical signals. The display device is used to adjust the gear of the displayed knob according to the gear adjustment information.

11. A detection method for detecting the rotation direction of a knob, characterized in that: The detection method comprises: generating at least two electrical signals according to the position of the shielding member; The rotation direction of the knob is determined according to the at least two electrical signals; the step of generating at least two electrical signals according to the position of the shielding member specifically comprises: Generate the at least two electrical signals according to the order in which at least two detection signal receiving devices are blocked; or The at least two electrical signals are generated according to the order in which the at least two detection signal receiving devices receive the detection signals.

12. The detection method according to claim 11, characterized in that: After the step of determining the rotation direction of the knob according to the at least two electrical signals, the method further includes: generating gear adjustment information according to the at least two electrical signals and the rotation direction of the knob; The displayed gear position of the knob is adjusted according to the gear position adjustment information.

13. An electrical appliance, characterized in that: include: A knob as claimed in any one of claims 4 to 10.

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