Infrared receiving circuit, infrared control circuit, method, device and induction device

Abstract

This application relates to the field of infrared remote control technology, and specifically relates to an infrared receiving circuit, an infrared control circuit, a method, a device, and an induction device, which solve the problem that the infrared receiving end in the prior art cannot accurately receive low-power infrared signals. The low-power infrared signal received by the infrared receiving module is transmitted to the first triode to drive the first triode to make the first triode in a conducting state. Since the first capacitor is connected to the collector of the first triode, when the first triode is in a cut-off state, the first capacitor is charged by the power supply. Therefore, when the first triode becomes in a conducting state, a negative pulse will be formed at one end where the first capacitor is connected to the second triode, causing the second triode to become in a cut-off state, and then making the conduction between the processing circuit and the power supply. This infrared receiving circuit amplifies and outputs the small-current infrared signal received by the infrared receiving module through a triode, so that the processing circuit can accurately distinguish whether there is an infrared signal.

Description

Technical Field

[0001] This application relates to the field of infrared remote control technology, and particularly to an infrared receiving circuit, an infrared control circuit, a method, a device, and an induction device. Background Art

[0002] Infectious diseases are a class of diseases caused by various pathogens that can be transmitted between humans, animals, or between humans and animals. Infectious diseases can usually be transmitted by direct contact with an infected individual or an object contaminated by an infected person, or can also be transmitted through air, water sources, food, etc. If any one of the links can be completely cut off, the occurrence and prevalence of the infectious disease can be prevented. The weak links of various infectious diseases are different and should be fully utilized in prevention. In addition to the leading link, measures should also be taken for other links. Only in this way can various infectious diseases be better prevented.

[0003] In public places, in order to avoid cross-infection of infectious diseases caused by contact, contactless products are often used, such as hand disinfection machines, automatic hand washers, etc. Most of these products use infrared technology for data transmission. However, the power consumption of infrared mainly lies in the transmitting tube. The maximum current of the transmitting tube can reach dozens of milliamperes. Assuming the emission is 50 mA and the lithium battery used is 500 mAh, the infrared transmitting tube can work for 10 hours. However, commonly used infrared remote controls, etc., have a usage time of more than 1 year, and infrared-triggered electronic devices have a usage time of more than 7 days. Therefore, it is necessary to reduce the emission power consumption to increase the usage time of the product. However, after reducing the infrared emission power consumption, the infrared signal is very weak, resulting in the infrared receiving end being unable to accurately receive the low-power infrared signal. Summary of the Invention

[0004] Aiming at the problem that the infrared receiving end in the prior art cannot accurately receive the low-power infrared signal, this application provides an infrared receiving circuit, an infrared control circuit, a method, a device, and an induction device.

[0005] In a first aspect, this application provides an infrared receiving circuit. The infrared receiving circuit includes a power supply, an infrared receiving module, a first triode, a first capacitor, and a second triode; one end of the infrared receiving module is connected to the power supply, the other end of the infrared receiving module is connected to the base of the first triode, the emitter of the first triode is grounded, the collector of the first triode is connected to one end of the first capacitor, one end of the first capacitor is also connected to the power supply, the other end of the first capacitor is connected to the base of the second triode, the emitter of the second triode is grounded, and the collector of the second triode is respectively connected to a processing circuit and the power supply.

[0006] In the above embodiments, the low-power infrared signal received by the infrared receiving module is transmitted to the first triode to drive the first triode to make it in the conducting state. Since one end of the first capacitor is connected to the power supply and is also connected to the collector of the first triode, when the first triode is in the cut-off state, the first capacitor is charged by the power supply. When the infrared receiving module receives the low-power infrared signal, the first triode changes from the cut-off state to the conducting state. Based on the characteristics of the capacitor, a negative pulse will be formed at the end of the first capacitor connected to the second triode, thereby causing the second triode to change from the conducting state to the cut-off state, and then making the connection between the processing circuit and the power supply respectively connected to the collector of the second triode conduct, so that the processing circuit receives the signal. This infrared receiving circuit amplifies and outputs the small-current infrared signal received by the infrared receiving module through the triode, so that the processing circuit can accurately distinguish whether there is an infrared signal.

[0007] According to an embodiment of the present application, optionally, in the above infrared receiving circuit, the infrared receiving module includes an infrared receiver;

[0008] One end of the infrared receiver is connected to the power supply, and the other end of the infrared receiver is connected to the base of the first triode.

[0009] According to an embodiment of the present application, optionally, in the above infrared receiving circuit, the infrared receiver is an infrared photosensitive triode or an infrared photosensitive diode.

[0010] According to an embodiment of the present application, optionally, in the above infrared receiving circuit, the infrared receiving module further includes a second capacitor;

[0011] The infrared receiver is connected to the base of the first triode through the second capacitor.

[0012] According to an embodiment of the present application, optionally, in the above infrared receiving circuit, the infrared receiving module further includes a follower;

[0013] The infrared receiver is connected to the base of the first triode through the follower.

[0014] According to an embodiment of the present application, optionally, in the above infrared receiving circuit, the infrared receiving module further includes a second capacitor and a follower;

[0015] One end of the infrared receiver is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the input end of the follower, and the output end of the follower is connected to the base of the first triode.

[0016] According to an embodiment of the present application, optionally, in the above infrared receiving circuit, both the first triode and the second triode are NPN triodes.

[0017] According to an embodiment of the present application, optionally, in the above infrared receiving circuit, the infrared receiving circuit further includes a diode;

[0018] The collector of the second triode is connected to the positive electrode of the diode, and the negative electrode of the diode is connected to the processing circuit.

[0019] In a second aspect, the present application further provides an infrared control circuit, including an infrared transmitting circuit, an infrared receiving circuit, and a processing circuit;

[0020] The infrared transmitting circuit is configured to transmit an infrared signal;

[0021] The infrared receiving circuit is configured to receive the infrared signal and convert the infrared signal into an electrical signal and send it to the processing circuit.

[0022] In a third aspect, the present application further provides an infrared control method, which is applied to an infrared control circuit, and the method includes:

[0023] The infrared receiving circuit receives an infrared signal and converts it into an electrical signal;

[0024] When the processing circuit receives the electrical signal, it sends a confirmation instruction to the infrared transmitting circuit;

[0025] The infrared transmitting circuit transmits an infrared signal corresponding to the confirmation instruction.

[0026] In a fourth aspect, the present application further provides an infrared control device, which is applied to an infrared control circuit, and the device includes:

[0027] An infrared receiving module, configured to receive an infrared signal by the infrared receiving circuit and convert it into an electrical signal;

[0028] A confirmation instruction sending module, configured to send a confirmation instruction to the infrared transmitting circuit when the processing circuit receives the electrical signal;

[0029] An infrared signal sending module, configured to enable the infrared transmitting circuit to transmit an infrared signal corresponding to the confirmation instruction.

[0030] In a fifth aspect, the present application further provides a sensing device, an equipment body, and the infrared control circuit as described in the second aspect, and the infrared control circuit is disposed in the equipment body.

[0031] Compared with the prior art, one or more of the above embodiments may have the following advantages or beneficial effects:

[0032] An infrared receiving circuit, an infrared control circuit, a method, a device, and an induction device provided by this application. The infrared receiving circuit includes a power supply, an infrared receiving module, a first triode, a first capacitor, and a second triode; one end of the infrared receiving module is connected to the power supply, the other end of the infrared receiving module is connected to the base of the first triode, the emitter of the first triode is grounded, the collector of the first triode is connected to one end of the first capacitor, one end of the first capacitor is also connected to the power supply, the other end of the first capacitor is connected to the base of the second triode, the emitter of the second triode is grounded, and the collector of the second triode is connected to the processing circuit and the power supply respectively. The low-power infrared signal received by the infrared receiving module is transmitted to the first triode to drive the first triode to make it in a conducting state. Since one end of the first capacitor is connected to the power supply and is connected to the collector of the first triode, when the first triode is in a cut-off state, the first capacitor is charged by the power supply. When the infrared receiving module receives a low-power infrared signal, the first triode changes from the cut-off state to the conducting state. Based on the characteristics of the capacitor, a negative pulse will be formed at the end of the first capacitor connected to the second triode, thereby causing the second triode to change from the conducting state to the cut-off state, and then making the connection between the processing circuit and the power supply respectively connected to the collector of the second triode conduct, so that the processing circuit receives the signal. This infrared receiving circuit amplifies and outputs the small-current infrared signal received by the infrared receiving module through a triode, so that the processing circuit can accurately distinguish whether there is an infrared signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In the following, this application will be described in more detail based on embodiments and with reference to the drawings.

[0034] Figure 1 It is a circuit diagram of an infrared receiving circuit provided by an embodiment of this application.

[0035] Figure 2 It is a circuit diagram of an infrared control circuit provided by an embodiment of this application.

[0036] Figure 3 It is a schematic flowchart of an infrared control method provided by an embodiment of this application.

[0037] In the drawings, the same components are denoted by the same reference numerals, and the drawings are not drawn to actual scale. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The following will describe the implementation manners of the present application in detail with reference to the accompanying drawings and embodiments, so as to fully understand the implementation process of how the present application uses technical means to solve technical problems and achieve corresponding technical effects and implement accordingly. Each feature in the embodiments of the present application can be combined with each other on the premise of not conflicting, and the formed technical solutions are all within the protection scope of the present application.

[0039] The present invention provides an infrared receiving circuit. Please refer to Figure 1 , the infrared receiving circuit includes a power supply VCC, an infrared receiving module 100, a first triode Q1, a first capacitor C1 and a second triode Q2; one end of the infrared receiving module 100 is connected to the power supply VCC, the other end of the infrared receiving module 100 is connected to the base of the first triode Q1, the emitter of the first triode Q1 is grounded, the collector of the first triode Q1 is connected to one end of the first capacitor C1, one end of the first capacitor C1 is also connected to the power supply VCC, the other end of the first capacitor C1 is connected to the base of the second triode Q2, the emitter of the second triode Q2 is grounded, and the collector of the second triode Q2 is respectively connected to a processing circuit MCU and the power supply VCC.

[0040] Among them, due to the use of a low-power emitting tube, the intensity of the signal it emits is relatively low. That is to say, the intensity of the infrared signal received by the infrared receiving module 100 is also relatively low. The infrared signal received by the infrared receiving module 100 can drive the first triode Q1. When the first triode Q1 is turned on by the signal, the voltage at the A end of the first capacitor C1 is instantaneously pulled down. Due to the capacitance characteristic, a negative pulse will be formed at the B end of the first capacitor C1, causing the second triode Q2 to cut off. At this time, the connection between the power supply VCC and the processing circuit MCU is established, and the signal of the power supply VCC can enter the processing circuit MCU, so that the processing circuit receives the signal that an infrared signal has been detected.

[0041] The low-power infrared signal received by the infrared receiving module 100 is transmitted to the first triode Q1 to drive the first triode Q1 to be in a conducting state. Since one end of the first capacitor C1 is connected to the power supply VCC and is also connected to the collector of the first triode Q1, when the first triode Q1 is in a cut-off state, the first capacitor C1 is charged by the power supply. When the infrared receiving module 100 receives a low-power infrared signal, the first triode Q1 changes from the cut-off state to the conducting state. Based on the characteristics of the capacitor, a negative pulse will be formed at the end of the first capacitor C1 connected to the second triode Q2, thereby causing the second triode Q2 to change from the conducting state to the cut-off state. Subsequently, the connection between the processing circuit MCU and the power supply VCC, which are respectively connected to the collector of the second triode Q2, is conducted, enabling the processing circuit MCU to receive the signal. The infrared receiving circuit amplifies and outputs the small-current infrared signal received by the infrared receiving module 100 so that the processing circuit MCU can accurately distinguish whether there is an infrared signal.

[0042] Among them, both the first triode Q1 and the second triode Q2 are NPN triodes. The NPN triode has current amplification and switching functions and can change a weak electrical signal into a signal of a certain intensity. The base of the first triode is connected to the output of the infrared receiving module 100, the emitter of the first triode Q1 is grounded, and the collector of the first triode Q1 is connected to the resistor R5 and the A end of the first capacitor C1. When the first triode Q1 is conducting, the A end of the first capacitor C1 is grounded, so it decreases instantaneously, and at this time the B end is negative.

[0043] In the above infrared receiving circuit, the infrared receiving module 100 includes an infrared receiver D1. One end of the infrared receiver D1 is connected to the power supply VCC, and the other end of the infrared receiver D1 is connected to the base of the first triode Q1.

[0044] It can be understood that the infrared receiver D1 can be an infrared photosensitive triode or an infrared photosensitive diode. The infrared receiver can well receive the infrared light signal with a wavelength of 940 nm emitted by the infrared emitting tube and cannot receive light of other wavelengths, thus ensuring the accuracy and sensitivity of the reception.

[0045] As a first implementation manner, the infrared receiving module 100 further includes a second capacitor C2; the infrared receiver D1 is connected to the base of the first triode Q1 through the second capacitor C2.

[0046] The second capacitor C2 is a blocking capacitor that can filter out the interference of natural light. Natural light is manifested as a DC signal. The capacitor blocks DC and passes AC, so it can filter out the interference of natural light. In addition, the second capacitor C2 can also couple the signal of the emitting tube to the B end of the second capacitor C2.

[0047] As a second implementation manner, according to the embodiments of the present application, optionally, in the above infrared receiving circuit, the infrared receiving module 100 further includes a follower U1; the infrared receiver D1 is connected to the base of the first triode Q1 through the follower U1.

[0048] In order to ensure that the signal received by the infrared receiver D1 can drive the first triode Q1, the signal received by the infrared receiver D1 can be transmitted to the follower U1, and the follower U1 follows the signal, so that the pulse signal can drive the first triode Q1.

[0049] As a third implementation manner, according to the embodiments of the present application, optionally, in the above infrared receiving circuit, the infrared receiving module further includes a second capacitor C2 and a follower U1; one end of the infrared receiver D1 is connected to the first end of the second capacitor C2, the second end of the second capacitor C2 is connected to the input end of the follower U1, and the output end of the follower U1 is connected to the base of the first triode Q1.

[0050] In the above implementation manner, through the second capacitor C2 and the follower U1, the infrared signal received by the infrared receiving module can be filtered and followed, ensuring the accuracy of the infrared signal, and at the same time ensuring that the infrared signal can drive the first triode Q1, and ensuring the accurate identification of the low-power infrared signal.

[0051] According to the embodiments of the present application, optionally, in the above infrared receiving circuit, the infrared receiving circuit further includes a diode D2; the collector of the second triode Q2 is connected to the positive electrode of the diode D2, and the negative electrode of the diode D2 is connected to the processing circuit MCU.

[0052] When the infrared receiver D1 does not receive a signal, the infrared receiver D1 is in a cut-off state or is provided with a signal of the same intensity by natural infrared light. At this time, the level at point A of the second capacitor C2 is a low level or a DC level. Due to the characteristic of the second capacitor C2 of blocking DC and passing AC, the level at point B of the second capacitor C2 is pulled down by the resistor R2 at this time, and the output of the follower U1 is a low level. Therefore, the first triode Q1 is in a cut-off state, and the power supply VCC charges the first capacitor C1 through R5. At this time, the A end of the first capacitor C1 is at the voltage VCC, and VCC makes the second triode Q2 conduct through R7. The power supply VCC is grounded through R8, the diode D2 cannot conduct, and the processing circuit MCU cannot detect the level either, that is, the recognition result is no infrared signal.

[0053] Please refer to Figure 2, this application also provides an infrared control circuit, which includes an infrared transmitting circuit, an infrared receiving circuit, and a processing circuit; the infrared transmitting circuit is used to transmit infrared signals; the infrared receiving circuit is used to receive the infrared signals and convert the infrared signals into electrical signals and send them to the processing circuit.

[0054] Please refer to Figure 3 , this application also provides an infrared control method, which is applied to an infrared control circuit. The method includes: the infrared receiving circuit receives an infrared signal and converts it into an electrical signal; when the processing circuit receives the electrical signal, it sends a confirmation instruction to the infrared transmitting circuit; the infrared transmitting circuit transmits an infrared signal corresponding to the confirmation instruction.

[0055] After the processing circuit MCU detects a pulse, it sends an instruction to the infrared transmitting circuit, so that the transmitting end of the infrared transmitting circuit emits multiple infrared signals again. The processing circuit MCU will receive the detection signal of the infrared signal again, so that the processing circuit MCU can confirm that the received infrared signal is correct.

[0056] This application also provides an infrared control device, which is applied to an infrared control circuit. The device includes:

[0057] An infrared receiving module, which is used for the infrared receiving circuit to receive an infrared signal and convert it into an electrical signal;

[0058] A confirmation instruction sending module, which is used to send a confirmation instruction to the infrared transmitting circuit when the processing circuit receives the electrical signal;

[0059] An infrared signal sending module, which is used for the infrared transmitting circuit to transmit an infrared signal corresponding to the confirmation instruction.

[0060] This application also provides a sensing device, which includes a device body and an infrared control circuit arranged in the device body. As an implementation manner, the sensing device may further include an infrared control circuit, a memory, and a processor. The processor is connected to the infrared control circuit. A computer program is stored on the memory. When the computer program is executed by the processor, it executes the above-mentioned infrared control method. Among them, the sensing device may be a sensing hand washing machine, a sensing disinfection machine, etc.

[0061] In summary, an infrared receiving circuit, an infrared control circuit, a method, a device, and an induction device provided by the present application. The infrared receiving circuit includes a power supply, an infrared receiving module, a first triode, a first capacitor, and a second triode; one end of the infrared receiving module is connected to the power supply, the other end of the infrared receiving module is connected to the base of the first triode, the emitter of the first triode is grounded, the collector of the first triode is connected to one end of the first capacitor, one end of the first capacitor is also connected to the power supply, the other end of the first capacitor is connected to the base of the second triode, the emitter of the second triode is grounded, and the collector of the second triode is connected to the processing circuit and the power supply respectively. The low-power infrared signal received by the infrared receiving module is transmitted to the first triode to drive the first triode to make the first triode in a conducting state. Since one end of the first capacitor is connected to the power supply and is connected to the collector of the first triode, when the first triode is in a cut-off state, the first capacitor is charged by the power supply. When the infrared receiving module receives a low-power infrared signal, the first triode changes from the cut-off state to the conducting state. Based on the characteristics of the capacitor, a negative pulse will be formed at the end of the first capacitor connected to the second triode, so that the second triode changes from the conducting state to the cut-off state, and then the connection between the processing circuit and the power supply respectively connected to the collector of the second triode is turned on, enabling the processing circuit to receive the signal. This infrared receiving circuit amplifies and outputs the small-current infrared signal received by the infrared receiving module through a triode, so that the processing circuit can accurately distinguish whether there is an infrared signal.

[0062] In several embodiments provided by the embodiments of the present application, it should be understood that the disclosed systems and methods can also be implemented in other ways. The system and method embodiments described above are only illustrative.

[0063] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0064] Although the embodiments disclosed in this application are as above, the content described is only an embodiment adopted for the convenience of understanding this application and is not intended to limit this application. Any person skilled in the art within the technical field to which this application pertains may make any modifications and changes in the form of implementation and details without departing from the spirit and scope disclosed in this application. However, the scope of patent protection of this application shall still be subject to the scope defined by the appended claims.

Claims

1. An infrared receiving circuit, characterized in that: The infrared receiving circuit includes a power supply, an infrared receiving module, a first transistor, a first capacitor and a second transistor; One end of the infrared receiving module is connected to the power supply, the other end of the infrared receiving module is connected to the base of the first transistor, the emitter of the first transistor is grounded, the collector of the first transistor is connected to one end of the first capacitor, one end of the first capacitor is also connected to the power supply, the other end of the first capacitor is connected to the base of the second transistor, the emitter of the second transistor is grounded, and the collector of the second transistor is connected to the processing circuit and the power supply respectively; The infrared receiving module includes an infrared receiver; one end of the infrared receiver is connected to the power supply, and the other end of the infrared receiver is connected to the base of the first transistor; The infrared receiving circuit further includes a diode; the collector of the second transistor is connected to the anode of the diode, and the cathode of the diode is connected to the processing circuit.

2. The infrared receiving circuit according to claim 1, characterized in that: The infrared receiver is an infrared phototransistor or an infrared photodiode.

3. The infrared receiving circuit according to claim 1, wherein: The infrared receiving module further includes a second capacitor; The infrared receiver is connected to the base of the first transistor through the second capacitor.

4. The infrared receiving circuit according to claim 1, characterized in that: The infrared receiving module also includes a follower; The infrared receiver is connected to the base of the first transistor through the follower.

5. The infrared receiving circuit according to claim 1, wherein: The infrared receiving module further includes a second capacitor and a follower; One end of the infrared receiver is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the input end of the follower, and the output end of the follower is connected to the base of the first transistor.

6. The infrared receiving circuit according to claim 1, characterized in that: The first transistor and the second transistor are both NPN transistors.

7. An infrared control circuit, characterized in that: comprising an infrared transmitting circuit, an infrared receiving circuit as claimed in any one of claims 1 to 6, and a processing circuit; The infrared transmitting circuit is used to transmit infrared signals; The infrared receiving circuit is used to receive the infrared signal, convert the infrared signal into an electrical signal and send it to the processing circuit.

8. An infrared control method, characterized in that: Applied to the infrared control circuit according to claim 7, the method comprises: The infrared receiving circuit receives the infrared signal and converts it into an electrical signal; When the processing circuit receives the electrical signal, it sends a confirmation instruction to the infrared transmitting circuit; The infrared transmitting circuit transmits an infrared signal corresponding to the confirmation instruction.

9. An infrared control device, characterized in that: Applied to the infrared control circuit according to claim 7, the device comprises: Infrared receiving module, used for infrared receiving circuit to receive infrared signals and convert them into electrical signals; a confirmation instruction sending module, configured to send a confirmation instruction to the infrared transmitting circuit when the processing circuit receives the electrical signal; The infrared signal sending module is used for the infrared transmitting circuit to transmit an infrared signal corresponding to the confirmation instruction.

10. A sensing device, characterized in that: It comprises a device body and the infrared control circuit as claimed in claim 7, wherein the infrared control circuit is arranged in the device body.

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