CN115547021A - Infrared emission and detection integrated chip - Google Patents
Infrared emission and detection integrated chip Download PDFInfo
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- CN115547021A CN115547021A CN202211478257.9A CN202211478257A CN115547021A CN 115547021 A CN115547021 A CN 115547021A CN 202211478257 A CN202211478257 A CN 202211478257A CN 115547021 A CN115547021 A CN 115547021A
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Abstract
The invention provides an infrared emission and detection integrated chip, which comprises a keyboard scanning circuit, an infrared emission control unit, an infrared detection control unit, an output control circuit, an oscillation circuit, a code sending circuit and an optical component, wherein: the keyboard scanning circuit is used for receiving the control signal, coding and generating an electric signal; the keyboard scanning circuit is respectively and electrically connected with the infrared emission control unit, the infrared detection control unit and the output control circuit; the infrared emission control unit is electrically connected with the oscillating circuit and the code sending circuit, the oscillating circuit is electrically connected with the code sending circuit, and the code sending circuit and the output control circuit are connected with the optical assembly to execute infrared remote control emission; the infrared detection unit is electrically connected with the optical component to form an infrared detection remote control. The invention can realize the simulation of the physical keyboard and can control different electrical appliances through the preset key codes. Different control codes can be switched to realize the switching of the keyboard, and then different electrical equipment is controlled.
Description
Technical Field
The invention relates to the technical field of infrared remote control, in particular to an infrared emission and detection integrated chip.
Background
In current intelligent electronic devices, infrared remote control is a very basic function. The current infrared remote control scheme is usually designed by using an infrared emission lamp to realize the infrared control function. However, the infrared remote control function is executed by the single infrared signal, a certain requirement is also provided for the emission angle of the infrared signal, sometimes, the user is required to continuously adjust the direction of the remote control device for emitting the infrared signal, so that the accuracy of infrared control can be improved, and the operation process is troublesome.
Secondly, the existing infrared remote control equipment is limited to the function of the key circuit in the control layer even if the existing infrared remote control equipment is a universal remote controller. The control function range of the key cannot be exceeded. The existing coding circuit can only realize function control based on an original key circuit, generally can only execute an infrared emission function or an infrared detection function, has single function, can only control one to one when facing various different electronic devices, and cannot realize fixed-point control of any device according to distance.
Disclosure of Invention
The invention provides an infrared emission and detection integrated chip, which is used for solving the problem that the control layer of the existing infrared remote control equipment is limited by the functions of a key circuit even though the existing infrared remote control equipment is a universal remote controller. The control function range of the key cannot be exceeded. The existing coding circuit can only realize function control based on an original key circuit, generally can only execute an infrared emission function or an infrared detection function, has single function, can only control one to one when facing various different electronic devices, and cannot realize the fixed-point control of any device according to distance.
The invention discloses an infrared emission and detection integrated chip, comprising:
keyboard scanning circuit, infrared emission control unit, infrared detection control unit, output control circuit, oscillating circuit, code sending circuit and optical assembly, wherein:
the keyboard scanning circuit is used for receiving the control signal, coding and generating an electric signal;
the keyboard scanning circuit is respectively and electrically connected with the infrared emission control unit, the infrared detection control unit and the output control circuit; wherein the content of the first and second substances,
the infrared emission control unit is electrically connected with the oscillating circuit and the code sending circuit, the oscillating circuit is electrically connected with the code sending circuit, and the code sending circuit and the output control circuit are connected with the optical assembly to execute infrared remote control emission;
the infrared detection unit is electrically connected with the optical assembly for infrared detection remote control.
Preferably, the keyboard scanning circuit includes an encoding analog circuit, an encoding circuit, and a switching control circuit, wherein:
the encoding circuit comprises a first register and a second register, the first register is used for storing preset encoding instructions, and the second register is used for storing target encoding instructions executed in real time;
the switching control circuit comprises a digital coding processor and a multi-channel isolation chip, wherein the digital coding processor is electrically connected with the first register, the input end of the multi-channel isolation chip is electrically connected with the digital coding processor and the first register, and the output end of the multi-channel isolation chip is electrically connected with the second register;
the coding analog circuit comprises an analog circuit chip, the analog circuit chip is electrically connected with the second register, wherein:
the analog circuit chip is composed of a contact type mini capacitor array;
a touch port and a display port are arranged on the analog circuit chip.
Preferably, the infrared emission control unit includes: the circuit comprises an analysis circuit, a first clock circuit, a calibration circuit and a differential amplification circuit; wherein the content of the first and second substances,
the analysis circuit is used for receiving the electric signal of the keyboard scanning circuit, analyzing the electric signal and generating an infrared control signal;
the first clock circuit is connected with the analysis circuit and used for generating a clock signal;
the calibration circuit is connected with the first clock circuit and the analysis circuit to generate a reference voltage;
a differential amplifier circuit, the first input end of which is connected with the analysis circuit, the output end of which is electrically connected with the oscillation circuit to generate differential current, and the differential current is input into the oscillation circuit, wherein:
and the second input end of the differential amplification circuit is connected with the output control circuit.
Preferably, the infrared detection control unit includes: the device comprises a first detection circuit, a second detection circuit and a processor module; wherein the content of the first and second substances,
the first detection circuit is connected with the optical assembly and the processor module and used for receiving the infrared distribution diagram and generating infrared induction information;
the second detection circuit is connected with the optical assembly and the processor module and is used for receiving the infrared distance measurement signals and carrying out remote control positioning;
the processor module is connected with a display port of the keyboard scanning circuit and used for generating a feedback signal according to the infrared induction information and remote control positioning and transmitting the feedback signal to external touch display equipment through the display port.
Preferably, the oscillation circuit includes: reference bias circuit, frequency modulation circuit, RC oscillator and low dropout regulator, wherein:
the reference bias circuit is respectively electrically connected with the frequency modulation circuit, the RC oscillator and the low-voltage linear voltage stabilizer, the reference bias circuit is used for reducing the bias current of the RC oscillator, the low-voltage linear voltage stabilizer is used for stabilizing the working voltage of the RC oscillator, and the frequency modulation circuit is electrically connected with the infrared emission control unit and the code sending circuit and provides reference current;
the input end of the RC oscillator is electrically connected with the frequency modulation circuit and the output end of the low dropout linear regulator respectively.
Preferably, the code sending circuit includes a signal conversion circuit, an infrared driving circuit, a filter circuit and a coupler, wherein:
the signal conversion circuit is electrically connected with the infrared emission control unit, receives an infrared control signal of the infrared emission control unit and converts the infrared control signal into a sawtooth wave signal;
the infrared driving circuit is electrically connected with the signal conversion circuit and generates driving voltage when the signal conversion circuit receives the sawtooth wave signal;
the filter circuit is electrically connected with the output end of the signal conversion circuit and is used for filtering high-frequency noise of the sawtooth wave signal;
and the coupler is electrically connected with the output end of the filter circuit and is coupled with the sawtooth wave signal to generate the sawtooth wave signal and transmit the sawtooth wave signal to the control bus of the optical component.
Preferably, the optical assembly comprises: the infrared detection device comprises a control bus, an infrared emission component, an infrared detection component and an infrared signal synchronous transmission component;
control bus, control bus connects infrared emission subassembly, infrared detection subassembly and infrared signal synchronous transmission subassembly respectively, wherein:
an infrared emitting assembly comprising a plurality of infrared emitters and a multi-channel digital switch, wherein:
the multi-channel digital switch is connected with each infrared transmitter respectively, and the infrared transmitters are used for transmitting infrared remote control signals;
infrared detection subassembly, including photodiode, FPGA drive count unit, decay circuit and signal discrimination circuit, wherein:
the photoelectric diode is used for receiving the infrared detection signal, the photoelectric diode is electrically connected with the attenuation circuit, the attenuation circuit is electrically connected with the signal identification circuit, and the signal identification circuit shapes the infrared detection signal into a pulse signal and sends the pulse signal to the FPGA driving counting unit for counting;
the infrared signal synchronous transmission assembly comprises an infrared driving circuit and a digital synchronous controller, wherein the digital synchronous controller is electrically connected with the infrared driving circuit, and when the infrared signal synchronous transmission assembly is used for sending an infrared remote control signal or receiving an infrared detection signal, the infrared signal synchronous transmission assembly synchronously transmits the signal to the output control circuit.
Preferably, the infrared emission component further comprises the following emission steps:
the multi-channel digital switch and the infrared transmitter are respectively driven by reference current of the oscillating circuit;
receiving sawtooth wave signals on a control bus through a multi-channel digital switch to generate infrared driving parameters of an infrared transmitter;
and driving the infrared emitter to emit infrared rays through the infrared driving parameters and generating an infrared emission feedback signal.
Preferably, the infrared detection assembly further comprises the following detection steps:
receiving the infrared detection signal through a photodiode and generating a detection electric signal;
transmitting the detection electric signal to an attenuation circuit for signal attenuation, and filtering a noise signal in the detection electric signal to generate a filtered electric signal;
transmitting the filtered electric signal to a signal identification circuit for signal waveform identification to generate a detection signal value;
and the FPGA drives the counting unit to count the detection signal value to generate a city target detection signal.
Preferably, the output control circuit includes: the device comprises a signal acquisition circuit, a signal control circuit and a voltage control output circuit; wherein the content of the first and second substances,
the signal acquisition circuit is used for receiving an input electric signal of the keyboard scanning circuit, determining the type of the infrared signal and determining the parameter of the infrared signal;
the signal control circuit is connected with the signal acquisition circuit electricity, and the signal control circuit is used for confirming benchmark drive voltage through infrared signal parameter, wherein:
the reference driving voltage comprises an infrared detection driving voltage and an infrared emission driving voltage of the optical component;
the voltage control output circuit is connected with the signal control circuit and the power supply, and after receiving the reference driving voltage, the variable voltage regulator is used for carrying out steady-state regulation on the driving voltage of the optical assembly. The invention has the beneficial effects that:
the invention can realize the simulation of the physical keyboard and can control different electrical appliances through the preset key codes. In order to facilitate the remote control of the electric appliances, the keyboard is switched by switching different control codes, namely, analog control keyboards of different electric appliances, and then the electric appliances are controlled.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a chip circuit of an integrated infrared emission and detection chip according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a chip circuit of the keyboard scanning circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the circuit components of an IR emission control unit in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a circuit configuration of an infrared detection control unit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a circuit configuration of an oscillating circuit according to an embodiment of the present invention;
FIG. 6 is a circuit diagram of a code transmitting circuit according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of the composition of an optical assembly in an embodiment of the present invention;
FIG. 8 is a schematic diagram of the electrical circuitry of an infrared detection assembly in an embodiment of the present invention;
FIG. 9 is a pulse diagram of a pulse count graph according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The invention discloses an infrared emission and detection integrated chip, which comprises:
keyboard scanning circuit, infrared emission control unit, infrared detection control unit, output control circuit, oscillating circuit, code sending circuit and optical assembly, wherein:
the keyboard scanning circuit is used for receiving the control signal, coding and generating an electric signal;
the keyboard scanning circuit is respectively and electrically connected with the infrared emission control unit, the infrared detection control unit and the output control circuit; wherein, the first and the second end of the pipe are connected with each other,
the infrared emission control unit is electrically connected with the oscillating circuit and the code sending circuit, the oscillating circuit is electrically connected with the code sending circuit, and the code sending circuit and the output control circuit are connected with the optical assembly to execute infrared remote control emission;
the infrared detection unit is electrically connected with the optical assembly for infrared detection remote control.
As shown in the attached figure 1, the invention relates to a control chip integrating two functions of infrared detection of infrared emission. In the prior art, although a universal remote controller is also provided, the control of different electrical equipment can be realized, and the mobile phone can also realize the control of different electrical equipment according to the switching of a remote control program. The universal remote controller expands the memory inside the chip, and codes of hundreds of thousands of single remote controllers with the same type or different types and various formats are integrated in a transmitting circuit, each code format is provided with a code, and when the universal remote controller is used, the corresponding codes are called out according to the codes, and the universal remote controller plays a role through each function key. This process of adjusting the code is called setting. Although the control of the electric appliance can be realized, the control code is stored; but it is
The keyboard scanning circuit can realize the coding of different control signals and the remote control of different intelligent electronic devices, and can firstly store a plurality of control codes; for example: the control codes of various different devices such as an air conditioner, a television, a radio, a fan and the like, namely keyboard codes, can be stored in advance, so that keyboard simulation is realized, and the keyboard can be changed into various keyboards. However, after a plurality of different control codes are built in, the codes cannot be changed, and the number of codes cannot be increased or decreased. The present invention can realize the increase and decrease of the codes. Secondly, the chip is limited by the keys of the keyboard, but the chip is designed for touch screen control, and can simulate various keys through a touch screen.
The invention is more suitable for touch screen equipment, and if the keyboard is a fixed array keyboard, the invention has limitations in the control layer, such as: the fixed keyboard has a 12 key code, but if the control code is a 24 key code, control cannot be achieved, but if the control code is within the 12 key code, simulation can be achieved. Therefore, the simulation of the keys through the touch screen device is the main applicable type of the present invention, but the keyboard circuit of the preset physical keyboard in the prior art is also applicable, but has limitations.
Because the keyboard scanning circuit of the invention can be converted into various keyboards based on codes and is also suitable for different control devices, the invention has the functions of infrared emission and infrared detection. The infrared emission function is used for realizing remote control, the infrared detection function can realize infrared distance measurement and infrared induction, the equipment location and the selection of the infrared remote control are realized, and the intelligent electronic equipment needing remote control is remotely controlled according to the infrared distance measurement distance.
The beneficial effects of the above technical scheme are that:
the invention can realize the simulation of the physical keyboard and can control different electrical appliances through the preset key codes. In order to facilitate the remote control of the electric appliances, the keyboard is switched by switching different control codes, namely, analog control keyboards of different electric appliances, and then the electric appliances are controlled.
Further, the keyboard scanning circuit comprises an encoding analog circuit, an encoding circuit and a switching control circuit, wherein:
the encoding circuit comprises a first register and a second register, the first register is used for storing preset encoding instructions, and the second register is used for storing target encoding instructions executed in real time;
the switching control circuit comprises a digital coding processor and a multi-channel isolation chip, wherein the digital coding processor is electrically connected with the first register, the input end of the multi-channel isolation chip is electrically connected with the digital coding processor and the first register, and the output end of the multi-channel isolation chip is electrically connected with the second register;
the coding analog circuit comprises an analog circuit chip, the analog circuit chip is electrically connected with the second register, wherein:
the analog circuit chip is composed of a contact type mini capacitor array;
a touch port and a display port are arranged on the analog circuit chip.
The principle of the technical scheme is as follows:
as shown in fig. 2, the encoding circuit of the present invention includes two registers, a first register for storing keyboard codes of remote control codes of different intelligent electronic devices and corresponding control instruction signals, and when performing remote control, the control code of the target intelligent electronic device is stored in a second register for code information calling and function execution.
The multi-channel isolation chip is used for isolating different control codes, control deviation is prevented when remote control is carried out, when two kinds of simulation keys are required to be synchronously called, two different keyboards are displayed on a screen of a touch screen through isolation of the channels, and simultaneous control of two kinds of equipment is achieved. And the multi-channel isolation chip is used for isolating execution of different key codes.
The analog circuit chip is used for simulating a control keyboard, and the capacitor array on the analog circuit chip is a contact capacitor array and is used for realizing keyboard simulation.
The beneficial effects of the above technical scheme are that:
the invention separates the execution storage and the preset storage of the simulation key code, and can prevent the memory shortage from occurring when the key code instruction is called. The switching control circuit can realize the physical isolation of executing codes when carrying out various remote control simulation. The coding simulation circuit realizes key simulation through the contact type mini capacitor array, triggers through the touch port, and uploads to the display screen through the display port to display specific keys.
Further, the infrared emission control unit includes:
the analysis circuit is used for receiving the electric signal of the keyboard scanning circuit, analyzing the electric signal and generating an infrared control signal;
the first clock circuit is connected with the analysis circuit and used for generating a clock signal;
the calibration circuit is connected with the first clock circuit and the analysis circuit to generate a reference voltage, and the reference voltage is the reference voltage of the differential amplification circuit;
a differential amplifier circuit, the first input end of which is connected with the analysis circuit, the output end of which is electrically connected with the oscillation circuit, generates differential current, and inputs the differential current into the oscillation circuit, wherein:
and the second input end of the differential amplifying circuit is connected with the output control circuit.
The principle of the technical scheme is as follows:
as shown in fig. 3, the infrared emission control unit of the present invention analyzes the electrical signal input by the keyboard scanning circuit to determine the corresponding infrared control signal;
the first clock circuit performs clock calibration of the infrared signal, so that a pulse signal is generated through the oscillation circuit based on the differential current of the differential amplification circuit, and infrared emission control is performed.
The infrared emission control unit is used for carrying out infrared emission and transmitting infrared information. After the electric signal is analyzed, the infrared light wave to be generated is determined, the signal of the infrared light wave is marked through a clock circuit, then the signal is conditioned through a calibration circuit, and further a differential current is generated through a differential amplification circuit, and the differential current forms a pulse signal for controlling the optical component to emit infrared light in an oscillation circuit.
The beneficial effects of the above technical scheme are that:
the infrared signal can be analyzed, calibrated and differentially amplified through the infrared emission control unit, and the infrared signal can be more accurately emitted under the optimization measures of the two circuits. The invention also optimizes and improves the mode of infrared emission only through the oscillating circuit in the prior art, the transmission of key signals is not accurate, and because the fixed physical keyboard is arranged in the prior art, a differential amplification and calibration circuit is not needed, but the invention is suitable for a simulated touch screen keyboard, so that signal loss and signal instability can not occur after the addition of the calibration circuit and the differential amplification circuit.
Further, the infrared detection control unit includes:
the first detection circuit is connected with the optical assembly and the processor module and used for receiving the infrared distribution map and generating infrared induction information;
the second detection circuit is connected with the optical assembly and the processor module and is used for receiving the infrared distance measurement signal and carrying out remote control positioning;
the processor module is connected with a display port of the keyboard scanning circuit and used for generating a feedback signal according to the infrared induction information and remote control positioning and transmitting the feedback signal to external touch display equipment through the display port.
The principle of the technical scheme is as follows: as shown in fig. 4, the infrared detection control unit is used for receiving the infrared distribution map to generate infrared sensing information, determining the infrared distribution conditions of different electronic devices, determining an external infrared remote control source, and performing infrared ranging and infrared positioning of different electronic devices through the infrared remote control source, so that single-to-single infrared control is realized through infrared ranging and infrared positioning, and control information can be displayed on an external terminal through a display port.
The first detection circuit mainly performs infrared induction to determine peripheral electric appliances capable of being controlled by infrared rays. The second detection circuit receives the infrared detection signal to realize infrared distance measurement. The processor module is connected with the display port, a distribution map or a list of controllable infrared electric appliances is displayed on the screen, and then a user selects the electric appliance to be controlled, so that single control or control over a plurality of electric appliances is performed.
The beneficial effects of the above technical scheme are that:
the invention can realize the infrared detection and distance measurement of the electrical equipment, then generate the infrared distribution diagram of the electrical equipment, select the electrical equipment to be controlled through the infrared distribution diagram, and then perform the infrared control.
Further, the oscillation circuit includes: reference bias circuit, frequency modulation circuit, RC oscillator and low dropout regulator, wherein:
the reference bias circuit is respectively electrically connected with the frequency modulation circuit, the RC oscillator and the low-voltage linear voltage stabilizer, the reference bias circuit is used for reducing the bias current of the RC oscillator, the low-voltage linear voltage stabilizer is used for stabilizing the working voltage of the RC oscillator, and the frequency modulation circuit is electrically connected with the infrared emission control unit and the code sending circuit and provides reference current;
the input end of the RC oscillator is electrically connected with the frequency modulation circuit and the output end of the low dropout linear regulator respectively.
The principle of the technical scheme is as follows: as shown in fig. 5, the oscillation circuit of the present invention may be provided with a reference bias circuit to reduce the bias current caused by RC oscillation, thereby realizing stable regulation of the pulse signal output by the oscillation circuit. Secondly, the working voltage is stabilized through the low-voltage linear voltage stabilizing circuit, and the regulation of the reference voltage can be realized, so that the multi-frequency regulation can be realized during the frequency modulation, and various different pulse signals can be generated.
Further, the code sending circuit comprises a signal conversion circuit, an infrared driving circuit, a filter circuit and a coupler, wherein:
the signal conversion circuit is electrically connected with the infrared emission control unit, receives an infrared control signal of the infrared emission control unit and converts the infrared control signal into a sawtooth wave signal;
the infrared driving circuit is electrically connected with the signal conversion circuit and generates driving voltage when the signal conversion circuit receives the sawtooth wave signal;
the filter circuit is electrically connected with the output end of the signal conversion circuit and is used for filtering high-frequency noise of the sawtooth wave signal;
and the coupler is electrically connected with the output end of the filter circuit and is coupled with the sawtooth wave signal to generate the sawtooth wave signal and is connected with a control bus of the optical component.
The principle of the technical scheme is as follows: as shown in fig. 6, in the process of generating the infrared control signal, the code sending circuit of the present invention converts the infrared control signal into an infrared signal in the form of a sawtooth wave to execute a corresponding infrared control command, and the sawtooth wave may generate high frequency noise in the transmission process, so that the filter circuit filters the high frequency noise, and then controls the optical component to send out an infrared emission signal in a manner of coupling control by the coupler.
The beneficial effects of the above technical scheme are that:
compared with the code sending circuit in the prior art, the code sending circuit is improved, the drive voltage is generated in a sawtooth wave form, so that high-frequency noise filtering is more convenient, and then the drive voltage is coupled with a sawtooth wave signal through a coupler, so that the control is performed through a control bus of an optical component, and the accuracy of the signal is ensured.
Further, the optical assembly includes:
control bus, control bus connects infrared emission subassembly and infrared detection subassembly respectively, wherein:
an infrared emitting assembly comprising a plurality of infrared emitters and a multi-channel digital switch, wherein:
the multi-channel digital switch is connected with each infrared emitter respectively, and the infrared emitters are used for emitting infrared remote control signals;
infrared detection subassembly, including photodiode, FPGA drive count unit, decay circuit and signal discrimination circuit, wherein:
the photodiode is used for receiving the infrared detection signal, the photodiode is electrically connected with the attenuation circuit, the attenuation circuit is electrically connected with the signal identification circuit, and the signal identification circuit shapes the infrared detection signal into a pulse signal and sends the pulse signal to the FPGA driving counting unit for counting; the FPGA driving counting unit counts pulses to determine the infrared distances of different electrical equipment, thereby realizing the infrared distribution function.
The infrared signal synchronous transmission assembly comprises an infrared driving circuit and a digital synchronous controller, wherein the digital synchronous controller is electrically connected with the infrared driving circuit, and when the infrared signal synchronous transmission assembly is used for sending an infrared remote control signal or receiving an infrared detection signal, the infrared signal synchronous transmission assembly synchronously transmits the signal to the output control circuit.
The principle of the technical scheme is as follows:
as shown in fig. 7, the infrared assembly of the present invention is composed of an infrared detection assembly and an infrared emission assembly which are respectively controlled by a control bus; the infrared remote control device is controlled through the same bus, the infrared detection function and the infrared emission function can be respectively executed through one infrared linear diode and one photodiode, in the remote control process, the infrared emission component firstly emits infrared emission signals, then the infrared detection component carries out infrared detection according to feedback signals of the infrared emission signals, controllable electric appliances are determined, and then infrared remote control is carried out.
The control bus is a driving type digital analog control bus, and the plurality of infrared emitters are used for controlling a plurality of electric appliances at the same time. The photodiode of the infrared detection assembly receives the infrared detection signal, and the attenuation circuit attenuates the signal, so that the signal identification circuit can identify the identification and analysis of the infrared detection signal conveniently, and the intensity of the infrared detection signal of different electrical equipment can be determined.
The beneficial effects of the above technical scheme are that:
the optical assembly of the invention is provided with a control bus which receives the upper infrared emission signal and the infrared detection signal to control the optical assembly. The optical component has double functions of detection and emission, and compared with the infrared chip in the prior art which only has an emission function, the optical component realizes the integrated dual-purpose. And the spacing of signals can be made.
Further, the infrared emission component also comprises the following emission steps:
respectively driving a multi-channel digital switch and an infrared transmitter through reference current of an oscillating circuit;
receiving sawtooth wave signals on a control bus through a multi-channel digital switch to generate infrared driving parameters of an infrared transmitter;
and driving an infrared emitter to emit infrared rays through the infrared driving parameters, and generating an infrared emission feedback signal.
The principle of the technical scheme is as follows:
as shown in fig. 7, in the step of performing infrared emission, the multi-channel digital switch can control different infrared emitters to perform infrared remote control through multiple different infrared signals, and can execute an infrared control function through two or more groups of infrared control signals, thereby realizing an encryption means of multiple infrared signals and ensuring the accuracy and safety of the infrared remote control signals.
Further, the infrared detection assembly further comprises the following detection steps:
receiving the infrared detection signal through a photodiode and generating a detection electric signal;
transmitting the detection electric signal to an attenuation circuit for signal attenuation, and filtering a noise signal in the detection electric signal to generate a filtered electric signal;
transmitting the filtered electric signal to a signal identification circuit for signal waveform identification to generate a detection signal value;
and the FPGA drives the counting unit to count the detection signal value to generate a city target detection signal.
The principle of the technical scheme is as follows: as shown in fig. 7, the infrared detection signal of the present invention is attenuated and filtered after receiving the detection electrical signal, eliminating the clutter in the detection process, and then the positioning and identification of the intelligent electronic device are performed by filtering the electrical signal and then by means of waveform identification.
The beneficial effects of the above technical scheme are that:
first, compared with direct distance measurement in the prior art, the method adopts a waveform identification mode to determine the type of the electric appliance, and then carries out positioning on the electric appliance through a counting mode, so that the accuracy and operability are higher.
In an alternative embodiment: the FPGA drives the counting unit to count the detection signal value, and the method comprises the following steps:
step 1: acquiring detection signal values and converting the detection signal values into a pulse counting diagram, as shown in the attached figure 9:
step 2: determining a time interval to be measured according to the transmitting time of the infrared transmitting signal and the receiving time of the infrared detecting signal;
and 3, step 3: determining the number of rising edges in a time interval to be measured
Time of rising edge
And falling edge time
；
And 4, step 4: calculating effective probe time
;
In the emission time of the infrared emission signal and the receiving time of the infrared detection signal, refraction or other interference may exist in the infrared signal, but the rising edge represents a signal when the infrared detection signal induces an electric appliance, and the signal belongs to effective detection time, so that the detection distance is calculated according to the effective detection time.
The clock count frequency of the pulse signal is shown.
And 5: and counting the frequency and the number of rising edges through a clock, and performing distance equivalent calculation:
wherein the content of the first and second substances,
represents the distance of each appliance;
conversion coefficient representing count and distance
In the scheme, the different electrical appliances are calculated in an equivalent pulse counting mode, so that the counting result is accurate, excessive errors cannot be generated, and efficient and quick distance calculation can be met.
Further, the output control circuit includes: the device comprises a signal acquisition circuit, a signal control circuit and a voltage control output circuit; wherein the content of the first and second substances,
the signal acquisition circuit is used for receiving an input electric signal of the keyboard scanning circuit, determining the type of the infrared signal and determining the parameter of the infrared signal;
the signal control circuit is connected with the signal acquisition circuit electricity, and the signal control circuit is used for confirming benchmark drive voltage through infrared signal parameter, wherein:
the reference driving voltage comprises an infrared detection driving voltage and an infrared emission driving voltage of the optical component;
the voltage control output circuit is connected with the signal control circuit and the power supply, and after receiving the reference driving voltage, the variable voltage regulator is used for carrying out steady state regulation on the driving voltage of the optical component.
The principle of the technical scheme is as follows:
as shown in fig. 8, the present invention can determine, through the type of the infrared signal, that the infrared driving signal of the infrared detection component or the infrared emission component of the optical component needs to be provided, and the corresponding infrared driving parameter, and can perform the emission driving and the infrared adjustment of the infrared emission signal by using the infrared driving parameter.
The beneficial effects of the above technical scheme are that:
the output control circuit is a circuit for providing reference driving voltage, and can determine the corresponding reference driving voltage according to the infrared signal parameters, so that the voltage is more stable when different electric appliances are controlled, and then the optical component is in a stable state when infrared emission and infrared detection are carried out.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An infrared emission and detection integrated chip, comprising:
keyboard scanning circuit, infrared emission control unit, infrared detection control unit, output control circuit, oscillating circuit, code sending circuit and optical assembly, wherein:
the keyboard scanning circuit is used for receiving the control signal, coding and generating an electric signal;
the keyboard scanning circuit is respectively and electrically connected with the infrared emission control unit, the infrared detection control unit and the output control circuit; wherein the content of the first and second substances,
the infrared emission control unit is electrically connected with the oscillating circuit and the code sending circuit, the oscillating circuit is electrically connected with the code sending circuit, and the code sending circuit and the output control circuit are connected with the optical assembly to execute infrared remote control emission;
the infrared detection unit is electrically connected with the optical assembly for infrared detection remote control.
2. An infrared emission and detection integrated chip as claimed in claim 1, wherein said keyboard scanning circuit comprises a coding analog circuit, a coding circuit and a switching control circuit, wherein:
the encoding circuit comprises a first register and a second register, the first register is used for storing preset encoding instructions, and the second register is used for storing target encoding instructions executed in real time;
the switching control circuit comprises a digital coding processor and a multi-channel isolation chip, wherein the digital coding processor is electrically connected with the first register, the input end of the multi-channel isolation chip is electrically connected with the digital coding processor and the first register, and the output end of the multi-channel isolation chip is electrically connected with the second register;
the coding analog circuit comprises an analog circuit chip, the analog circuit chip is electrically connected with the second register, wherein:
the analog circuit chip is formed by a contact type mini capacitor array;
a touch port and a display port are arranged on the analog circuit chip.
3. An infrared emission and detection integrated chip as claimed in claim 1, wherein said infrared emission control unit comprises: the circuit comprises an analysis circuit, a first clock circuit, a calibration circuit and a differential amplification circuit; wherein, the first and the second end of the pipe are connected with each other,
the analysis circuit is used for receiving the electric signal of the keyboard scanning circuit, analyzing the electric signal and generating an infrared control signal;
the first clock circuit is connected with the analysis circuit and used for generating a clock signal;
the calibration circuit is connected with the first clock circuit and the analysis circuit to generate a reference voltage;
a differential amplifier circuit, the first input end of which is connected with the analysis circuit, the output end of which is electrically connected with the oscillation circuit to generate differential current, and the differential current is input into the oscillation circuit, wherein:
and the second input end of the differential amplifying circuit is connected with the output control circuit.
4. An infrared emission and detection integrated chip as claimed in claim 1, wherein said infrared detection control unit comprises: the device comprises a first detection circuit, a second detection circuit and a processor module; wherein, the first and the second end of the pipe are connected with each other,
the first detection circuit is connected with the optical assembly and the processor module and used for receiving the infrared distribution diagram and generating infrared induction information;
the second detection circuit is connected with the optical assembly and the processor module and is used for receiving the infrared distance measurement signal and carrying out remote control positioning;
the processor module is connected with a display port of the keyboard scanning circuit and used for generating a feedback signal according to the infrared induction information and remote control positioning and transmitting the feedback signal to external touch display equipment through the display port.
5. An infrared emission and detection integrated chip as claimed in claim 1, wherein said oscillation circuit comprises: reference bias circuit, frequency modulation circuit, RC oscillator and low dropout regulator, wherein:
the reference bias circuit is respectively electrically connected with the frequency modulation circuit, the RC oscillator and the low-voltage linear voltage stabilizer, the reference bias circuit is used for reducing the bias current of the RC oscillator, the low-voltage linear voltage stabilizer is used for stabilizing the working voltage of the RC oscillator, and the frequency modulation circuit is electrically connected with the infrared emission control unit and the code sending circuit and provides reference current;
the input end of the RC oscillator is electrically connected with the frequency modulation circuit and the output end of the low dropout linear regulator respectively.
6. The infrared emission and detection integrated chip of claim 1, wherein the code sending circuit comprises a signal conversion circuit, an infrared driving circuit, a filtering circuit, and a coupler, wherein:
the signal conversion circuit is electrically connected with the infrared emission control unit, receives an infrared control signal of the infrared emission control unit and converts the infrared control signal into a sawtooth wave signal;
the infrared driving circuit is electrically connected with the signal conversion circuit and generates driving voltage when the signal conversion circuit receives the sawtooth wave signal;
the filter circuit is electrically connected with the output end of the signal conversion circuit and is used for filtering high-frequency noise of the sawtooth wave signal;
and the coupler is electrically connected with the output end of the filter circuit and is coupled with the sawtooth wave signal to generate the sawtooth wave signal and transmit the sawtooth wave signal to the control bus of the optical component.
7. An infrared emission and detection integrated chip as claimed in claim 1, wherein said optical assembly comprises: the infrared emission control system comprises a control bus, an infrared emission component, an infrared detection component and an infrared signal synchronous transmission component;
control bus, control bus connects infrared emission subassembly, infrared detection subassembly and infrared signal synchronous transmission subassembly respectively, wherein:
an infrared emitting assembly comprising a plurality of infrared emitters and a multi-channel digital switch, wherein:
the multi-channel digital switch is connected with each infrared transmitter respectively, and the infrared transmitters are used for transmitting infrared remote control signals;
infrared detection subassembly, including photodiode, FPGA drive count unit, decay circuit and signal discrimination circuit, wherein:
the photoelectric diode is used for receiving the infrared detection signal, the photoelectric diode is electrically connected with the attenuation circuit, the attenuation circuit is electrically connected with the signal identification circuit, and the signal identification circuit shapes the infrared detection signal into a pulse signal and sends the pulse signal to the FPGA driving counting unit for counting;
the infrared signal synchronous transmission assembly comprises an infrared driving circuit and a digital synchronous controller, wherein the digital synchronous controller is electrically connected with the infrared driving circuit, and when the infrared signal synchronous transmission assembly is used for sending an infrared remote control signal or receiving an infrared detection signal, the infrared signal synchronous transmission assembly synchronously transmits the signal to the output control circuit.
8. An infrared emission and detection integrated chip as claimed in claim 7, wherein said infrared emission assembly further comprises the following emission steps:
respectively driving a multi-channel digital switch and an infrared transmitter through reference current of an oscillating circuit;
receiving sawtooth wave signals on a control bus through a multi-channel digital switch to generate infrared driving parameters of an infrared transmitter;
and driving the infrared emitter to emit infrared rays through the infrared driving parameters and generating an infrared emission feedback signal.
9. An infrared emission and detection integrated chip as claimed in claim 7, wherein said infrared detection assembly further comprises the following detection steps:
receiving the infrared detection signal through a photodiode and generating a detection electric signal;
transmitting the detection electric signal to an attenuation circuit for signal attenuation, and filtering a noise signal in the detection electric signal to generate a filtered electric signal;
transmitting the filtered electric signal to a signal identification circuit for signal waveform identification to generate a detection signal value;
and the FPGA drives the counting unit to count the detection signal value to generate a city target detection signal.
10. An infrared emission and detection integrated chip as claimed in claim 1, wherein said output control circuit comprises: the device comprises a signal acquisition circuit, a signal control circuit and a voltage control output circuit; wherein the content of the first and second substances,
the signal acquisition circuit is used for receiving an input electric signal of the keyboard scanning circuit, determining the type of the infrared signal and determining the parameter of the infrared signal;
the signal control circuit is connected with the signal acquisition circuit electricity, and the signal control circuit is used for confirming benchmark drive voltage through infrared signal parameter, wherein:
the reference driving voltage comprises an infrared detection driving voltage and an infrared emission driving voltage of the optical component;
the voltage control output circuit is connected with the signal control circuit and the power supply, and after receiving the reference driving voltage, the variable voltage regulator is used for carrying out steady-state regulation on the driving voltage of the optical assembly.
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| CN117334036A (en) * | 2023-12-01 | 2024-01-02 | 荣耀终端有限公司 | Infrared remote control method and terminal equipment |
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| CN115547021B (en) | 2023-03-10 |
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Address after: 518000 East, floor 4, building 4, Shenzhen Software Park, No. 2, Gaoxin Zhonger Road, Maling community, Yuehai street, Nanshan District, Shenzhen, Guangdong Patentee after: Shenzhen Meisi Micro Semiconductor Co.,Ltd. Address before: 518000 East, floor 4, building 4, Shenzhen Software Park, No. 2, Gaoxin Zhonger Road, Maling community, Yuehai street, Nanshan District, Shenzhen, Guangdong Patentee before: SHENZHEN MEIXI MICRO SEMICONDUCTOR CO.,LTD. |