Circuit and device for simulating generation of stable virtual taste

Abstract

The invention discloses a circuit and a device for simulating generation of stable virtual taste. The circuit comprises a main control module, an electrical stimulation module, a temperature control module, a power supply module, a key module, a wireless communication module and a display module. The bidirectional constant current source design in the electrical stimulation module can generate a stable current with a certain magnitude and frequency, and under the cooperation of the temperature control module, the taste output part stimulates the tongue of the human body to generate a virtual taste sense. The power supply module is used for power supply management of the whole device and supports a wired charging mode and a wireless charging mode. The key module is used for directly switching taste modes and can also be connected with a mobile phone end through the wireless communication module to achieve remote control and monitoring of virtual taste. The whole circuit is simple in structure, high in stability and reliability, convenient to use and low in cost.

Description

Technical Field

[0001] The present invention relates to the field of virtual technology, and particularly to a method and device for simulating and generating stable virtual taste. Background Art

[0002] Nowadays, with the improvement of living standards, the number of people with "three highs" (high blood pressure, high blood sugar, and high blood lipid) is increasing, and diseases are getting younger. People are paying more and more attention to diet health and external image, and the number of people losing weight is constantly growing. Such special groups need to stay away from high-sugar and high-salt foods, but still want to enjoy delicious food in light meals. Therefore, how to use technology to reduce food additives and balance health and taste enjoyment has become a new topic. In addition, special groups such as those who are afraid of taking traditional Chinese medicine are also concerned about methods and devices for eliminating or changing bitter tastes.

[0003] There are five basic tastes: sour, sweet, bitter, spicy, and salty. All the tastes usually tasted are the result of the mixture of these five tastes. Research shows that by using electroinduction technology, by adjusting the current magnitude, temperature, and frequency, and combining the current and temperature with the tongue senses, users can achieve "tasting all flavors without real food".

[0004] The research on accurately simulating food flavors with bioelectric signals is currently in the experimental stage of continuous improvement and adjustment. The designed devices provide unstable currents or have too single a charging method. If the provided current is unstable, it will lead to disordered taste experiences, abnormal intensities, and even cause physiological reactions such as discomfort in the mouth and tongue and nausea, reducing the experience of related products. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method and device for simulating and generating stable virtual taste.

[0006] The technical solution adopted by the present invention is as follows: A method and device for simulating and generating stable virtual taste, including a main control module and its connected electric stimulation module, temperature control module, power supply module, key module, wireless communication module, and display module.

[0007] Among them, the electric stimulation module adopts a bidirectional constant current source design, can achieve stable current output with adjustable frequency, is connected to the main control module through an analog switch, and is connected to the power supply module and the taste output part; The power supply module has a design of filtering and voltage stabilization, and there are two charging methods: wireless and wired; The key module has a design of debounce processing to prevent transient voltage changes; The wireless communication module realizes reporting data to the mobile phone app and sending the instructions of the app to the hardware system, so as to realize remote control of the hardware system by the app; The temperature control module has the function of temperature control, which can keep the temperature within a certain range, ensure stable cold and heat stimulation of the tongue, and cooperate with the magnitude of the current to simulate the generation of taste.

[0008] Preferably, the electrical stimulation module generates bioelectric signals that directly contact the human body; it adopts a bidirectional constant current source scheme, which mainly consists of an analog switch and an operational amplifier, where: There is a first operational amplifier U1, whose non-inverting input terminal is connected to the input voltage V+ through a resistor R14, and the inverting input terminal is connected to the input voltage V- through a resistor R13; there is a feedback path, and the feedback resistor R12 is connected between the output terminal and the inverting input terminal of the first operational amplifier U1. There is a second operational amplifier U2, and the resistor R15 is connected between the non-inverting input terminal of the first operational amplifier U1 and the inverting input terminal of the second operational amplifier U2, which cooperates with the feedback resistor R12 to enhance the anti-interference ability of the circuit to the fluctuations of the input voltages V+ and V-.

[0009] Preferably, the power supply module includes three parts: battery voltage detection, charging management, and voltage conversion; the voltage detection circuit is responsible for detecting the voltage value of the battery; the charging management circuit is used to manage the charging and discharging of the built-in lithium battery and supports two charging methods: wired and wireless; the voltage conversion circuit is responsible for performing corresponding boost or voltage regulation operations.

[0010] Preferably, the button module is used to directly switch between different flavors, and its main part consists of a switch and a capacitor, with a capacitor connected in parallel to the button.

[0011] Preferably, the voltage detection circuit has an operational amplification and feedback stabilization module; The operational amplification and feedback stabilization module part includes an operational amplifier, whose non-inverting input terminal is connected to the output node of the voltage division module, and the inverting input terminal is connected to the output terminal ADC1 of the operational amplifier U4 through a resistor R34.

[0012] Preferably, for the power management circuit, the wired method is to charge the lithium battery through the USB port, and the wireless method is connected in parallel with it, which is divided into a transmitting and a receiving module. This circuit design has three stability units: Power filter stability unit: On the power input line, there is a resistor R3, and a large capacitor C1 and a small capacitor C2 are connected in parallel at the power input node; Output terminal stability unit: In the output line of the charging module, there is a capacitor C3 connected; Feedback adjustment stability unit: The circuit includes a resistor R2.

[0013] Preferably, the voltage conversion circuit involves a total of four types of stability unit designs: filter capacitor stability unit, feedback adjustment stability unit, energy storage inductor and capacitor stability unit, and diode protection stability unit.

[0014] The described filtering capacitor stabilization unit includes: capacitors C12, C11, C5, and C4 are connected in parallel at the input and output terminals of the circuit, and three groups of parallel combinations of large and small capacitors are set, namely C13 and C14, C8 and C9, C6 and C7; the two groups of large and small capacitors C6, C7 and C8, C9 are respectively connected to the input and output terminals of chip 3; by using the characteristics of large capacitors passing low frequencies and small capacitors passing high frequencies, it effectively filters out low-frequency and high-frequency noise in the voltage, achieving the stability of the positive and negative power supply voltage outputs.

[0015] The described feedback regulation stabilization unit includes: two voltage dividing circuits are set in the circuit, one group is composed of resistors R8 and R9, and the other group is composed of resistors R6 and R7. The two voltage dividing circuits together form a feedback network, which are respectively connected to the FB pins of chip 1 and chip 2, and can continuously transmit stable feedback signals to the chip, thereby accurately regulating the chip's regulation of the output voltage and ensuring that the output voltage is stable within the set range.

[0016] The described energy storage inductor and capacitor stabilization unit includes LC filter structures respectively formed by inductor L1 and capacitor C4, and inductor L2 and capacitor C10; relying on the characteristics of inductors suppressing sudden changes in current and capacitors storing and releasing electrical energy, these structures can further smooth the output voltage, significantly reduce ripple interference, and effectively improve the stability of the circuit output.

[0017] The described diode protection stabilization unit includes the setting of multiple diodes (D1 - D4), which prevent voltage backflow and perform signal indication, ensure the unidirectional flow of current in the circuit, and enhance the circuit stability.

[0018] The beneficial effects of the present invention are: 1) The stability design is carried out for multiple module circuits, making the output current more stable and accurate, thereby improving the user experience of virtual taste.

[0019] 2) It supports two charging methods, wired and wireless, to meet the application requirements of users in different scenarios.

[0020] 3) It has a good human-computer interaction function. It can not only be directly controlled by buttons, but also can be connected and controlled through a small program or APP, adjust the taste, and detect and record usage data. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a specific implementation architecture of a method and device for simulating and generating a stable virtual taste according to the present invention.

[0022] Figure 2 It is a circuit diagram of a bidirectional constant current source.

[0023] Figure 3 It is a circuit diagram of a voltage detection circuit.

[0024] Figure 4 It is a circuit diagram of a power management circuit.

[0025] Figure 5 It is a circuit diagram of a voltage conversion circuit. Specific implementation manners

[0026] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0027] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or devices.

[0028] Referring to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments. Embodiment

[0029] Figure 1 It is an architecture diagram of a specific implementation manner of a method and device for analogously generating a stable virtual taste in the present invention.

[0030] In this embodiment, as Figure 1 shown, a method and device for analogously generating a stable virtual taste in the present invention include a main control module, an electrical stimulation module, a temperature control module, a power supply module, a key module, a wireless communication module, and a display module.

[0031] The electrical stimulation module adopts a bidirectional constant current source design, can achieve the output of a constant current, is connected to the main control module through an analog switch, and is connected to the power supply module and the taste output part; The power supply module is designed with filtering and voltage stabilization, and there are two charging methods: wireless and wired. The key module has a debounce process to prevent voltage transient changes. The wireless communication module realizes reporting data to the mobile phone App and sending the instructions of the App to the hardware system, so as to realize the remote control and data monitoring of the hardware system by the App. The temperature control module has the function of temperature control, which can keep the temperature within a certain range, ensure stable cold and hot stimulation of the tongue, and cooperate with the current size to simulate the generation of taste.

[0032] In the embodiment of the present application, for the mode detection module and the electrical stimulation module, a bioelectric signal directly contacting the human body will be generated. It adopts a bidirectional constant current source scheme, which mainly consists of an analog switch and an operational amplifier. Among them: There is a first operational amplifier U1, whose non-inverting input terminal is connected to the input voltage V+ through a resistor R14, and the inverting input terminal is connected to the input voltage V- through a resistor R13; there is a feedback path, and a feedback resistor R12 is connected between the output terminal and the inverting input terminal of the first operational amplifier U1 to stabilize the output level of the first operational amplifier U1. There is a second operational amplifier U2, and a resistor R15 is connected between the non-inverting input terminal of the first operational amplifier U1 and the inverting input terminal of the second operational amplifier U2, which cooperates with the feedback resistor R12 to enhance the anti-interference ability of the circuit to the fluctuations of the input voltages V+ and V-.

[0033] The operational amplifier adopts an operational amplifier with low offset voltage, so that in the ideal case, the voltage difference between the two input terminals is close to zero.

[0034] The analog switch is preferably RS2323XUTQK10, which has low power consumption, small package size and low on-resistance, can reduce the loss in signal transmission, improve signal integrity. At the same time, it has the advantages of high bandwidth and fast switching speed.

[0035] Preferably, the power supply module includes three parts: battery voltage detection, charging management and voltage conversion; the voltage detection circuit is responsible for detecting the voltage value of the battery; the charging management circuit is used to manage the charging and discharging of the built-in lithium battery and supports two charging methods: wired and wireless; the voltage conversion circuit is responsible for completing the corresponding boost or voltage stabilization operation.

[0036] Preferably, the key module is used to directly switch different flavors. The main part consists of a switch and a capacitor. By connecting a capacitor in parallel with the key, using the characteristic that the voltage across the capacitor cannot change suddenly, the voltage across the key changes smoothly, thereby removing the jitter of the key signal and better ensuring stability.

[0037] Preferably, the main control module is built in with an ADC module, which is mainly responsible for sending instructions to each module in the system, receiving feedback data from each module, and processing it to control the overall operation of the system.

[0038] Preferably, the voltage detection circuit has an operational amplifier and feedback stabilization module.

[0039] The operational amplifier and feedback stabilization module includes an operational amplifier. Its non-inverting input terminal is connected to the output node of the voltage division module, and its inverting input terminal is connected to the output terminal ADC1 of the operational amplifier U4 through a resistor R34. This feedback connection forms a negative feedback loop to stabilize the output of the operational amplifier, ensuring the stability of the signal output to ADC1, and enhancing the overall stability of the circuit through the above negative feedback mechanism.

[0040] The operational amplifier is preferably LMV321, which has low cost, high slew rate, good anti-interference ability, and small package size, facilitating the realization of the requirement of small product volume. And it is specifically designed for the operating voltage (2.7V to 5V), and its performance specifications can reach or exceed those of LM358 and LM324 devices, maximizing the benefits.

[0041] Preferably, the power management circuit charges the lithium battery through the USB port in the wired mode, and the wireless mode is connected in parallel with it, which is divided into a transmitting module and a receiving module. A total of three stabilization units are designed in this circuit, including a power filter stabilization unit, an output terminal stabilization unit, and a feedback regulation stabilization unit.

[0042] The power filter stabilization unit: On the power input line, a resistor R3 is provided, and a large capacitor C1 and a small capacitor C2 are connected in parallel at the power input node. Through the combination of the above resistor and capacitor, the input power is filtered to suppress power noise and stabilize the input power voltage, ensuring the stable operation of the charging module.

[0043] The output terminal stabilization unit: In the output line of the charging module, a capacitor C3 is connected. This capacitor smooths the output voltage, reduces the fluctuation of the output voltage, ensures the stability of the voltage output to the lithium battery, and further improves the stability of the charging process.

[0044] The feedback regulation stabilization unit: The circuit includes a resistor R2, which participates in the charging status indication and possible feedback regulation mechanism. By feedback regulating the signals related to the charging status, the stable operation of the charging module under different working conditions is maintained.

[0045] For the battery management chip in the circuit, it is recommended to use TP4056, which can provide a pre-charge voltage of 4.2V with an accuracy of ±1%. It is based on a special internal MOSFET architecture and an anti-reverse charging circuit, eliminating the need for external detection resistors and isolation diodes. At the same time, when the external environmental temperature is too high or in high-power applications, thermal feedback can adjust the charging current to reduce the chip temperature and keep the temperature stable. It also has an automatic recharge function, eliminating the need for periodic charging cycle starts and ensuring that the battery is maintained in a nearly fully charged state.

[0046] Preferably, the voltage conversion circuit involves a total of four types of stability unit designs: a filter capacitor stability unit, a feedback regulation stability unit, a storage inductor and capacitor stability unit, and a diode protection stability unit.

[0047] The filter capacitor stability unit includes: capacitors C12, C11, C5, and C4 are connected in parallel at the input and output ends of the circuit, and three groups of parallel combinations of large and small capacitors are set, namely C13 and C14, C8 and C9, C6 and C7; the two groups of large and small capacitors C6, C7 and C8, C9 are respectively connected to the input and output ends of chip 3; by using the characteristics of large capacitors passing low-frequency signals and small capacitors passing high-frequency signals, it effectively filters out low-frequency and high-frequency noise in the voltage, achieving the stability of the positive and negative power supply voltage outputs.

[0048] The feedback regulation stability unit includes: two voltage division circuits are set in the circuit, one composed of resistors R8 and R9, and the other composed of resistors R6 and R7. The two voltage division circuits together form a feedback network, which are respectively connected to the FB pins of chip 1 and chip 2, and can continuously transmit stable feedback signals to the chip, thereby accurately regulating the chip's adjustment of the output voltage and ensuring that the output voltage is stable within the set range.

[0049] The storage inductor and capacitor stability unit includes LC filter structures respectively formed by inductor L1 and capacitor C4, and inductor L2 and capacitor C10. Relying on the characteristics of inductors suppressing sudden changes in current and capacitors storing and releasing electrical energy, these structures can further smooth the output voltage, significantly reduce ripple interference, and effectively improve the stability of the circuit output.

[0050] The diode protection stability unit includes the setting of multiple diodes (D1 - D4), which prevent voltage backflow and provide signal indication, ensure the unidirectional flow of current in the circuit, and enhance the circuit stability.

[0051] Chip 1 can adopt TPS61040, which has a very small package footprint, which is very conducive to meeting the requirement of small product volume. At the same time, it also has the advantages of low power consumption, high efficiency, long life, and low cost.

[0052] The chip 2 can be MT3608, which has low power consumption, high efficiency, is not prone to aging, has a long service life, strong anti-interference ability, little influence of temperature change on it, and high reliability. At the same time, its design is simple, occupies a small area, is convenient for layout, and reduces the production cost.

[0053] The diodes D1-D4 are preferably SS34. As a surface mount Schottky diode, it has a small volume and high stability, and is particularly suitable for small current electronic speed controllers such as model electronic speed controllers. At the same time, it has advantages such as low power consumption, high efficiency, high current handling capacity, fast switching characteristics and high surge current withstand capacity.

[0054] The chip 3 can be AMS1117, which has a high cost performance and a small volume. At the same time, it has the advantages of low power consumption and high efficiency, can work in a wide frequency range, and maintains stable performance in high temperature environments. In particular, this device performs excellently in weak signal processing and can provide stable and reliable performance in low power consumption and low noise scenarios.

[0055] Preferably, the temperature control module is used to perform hot and cold stimulation on the tongue. It has the function of temperature control and can keep the temperature within a certain range. It is divided into a temperature detection module and a heating and cooling module.

[0056] The temperature detection module includes three parts of design: Voltage division and stabilization part: Use resistors to form a voltage division circuit to divide the power supply voltage and provide a stable reference voltage for the operational amplifier to ensure the stability of signal processing.

[0057] Signal conditioning and stabilization part: The first operational amplifier performs preliminary conditioning on the voltage-divided signal, and the second operational amplifier further amplifies and processes the temperature-related signal. This two-stage operational amplifier structure ensures the stability and accuracy of the temperature detection signal through precise signal conditioning.

[0058] Grounding and stabilization part: Grounding is set at multiple places to effectively reduce power supply noise and interference and provide a stable working environment for the operational amplifier and the entire temperature control detection circuit.

[0059] The recommended operational amplifier is TLV333, which has high precision, low power consumption, a small package size, built-in EMI filtering, and a wide operating voltage range and has rail-to-rail ability.

[0060] The heating and cooling module performs heating or cooling operations on the output part according to instructions.

Claims

1. A method and device for analogously generating a stable virtual taste, characterized in that: It includes a main control module and an electrically stimulating module, a temperature control module, a power supply module, a button module, a wireless communication module, and a display module connected thereto; among which: The electrically stimulating module adopts a bidirectional constant current source design, can achieve stable current output with adjustable frequency, is connected to the main control module through an analog switch, and is connected to the power supply module and the taste output part; The power supply module has a design of filtering and voltage stabilization, and there are two charging methods: wireless and wired; The button module has a debounce process to prevent voltage transient changes; The wireless communication module realizes reporting data to the mobile phone App and sending the instructions of the App to the hardware system, so as to realize remote control and monitoring of the hardware system by the App; The temperature control module has the function of temperature control, can keep the temperature within a certain range, ensure stable thermal and cold stimulation of the tongue, and cooperate with the current magnitude to simulate the generation of taste.

2. The method and device for analogously generating a stable virtual taste according to claim 1, wherein The electrically stimulating module will generate bioelectric signals that directly contact the human body; it adopts a bidirectional constant current source scheme, which is mainly composed of an analog switch and an operational amplifier; among which: There is a first operational amplifier U1, whose non-inverting input terminal is connected to the input voltage V+ through a resistor R14, and the inverting input terminal is connected to the input voltage V- through a resistor R13; there is a feedback path, and the feedback resistor R12 is connected between the output terminal and the inverting input terminal of the first operational amplifier U1; There is a second operational amplifier U2, and the resistor R15 is connected between the non-inverting input terminal of the first operational amplifier U1 and the inverting input terminal of the second operational amplifier U2, and cooperates with the feedback resistor R12 to enhance the anti-interference ability of the circuit to the fluctuations of the input voltages V+ and V-; 3. A method and device for analogously generating a stable virtual taste according to claim 1, characterized in that, The power supply module includes three parts: battery voltage detection, charging management, and voltage conversion; the voltage detection circuit is responsible for detecting the voltage value of the battery; the charging management circuit is used to manage the charging and discharging of the built-in lithium battery, and supports two charging methods: wired and wireless; the voltage conversion circuit is responsible for performing corresponding boost or voltage stabilization operations.

4. A method and device for analogously generating a stable virtual taste according to claim 1, characterized in that, The button module is used to directly switch different tastes. The main part is composed of a switch and a capacitor. By connecting a capacitor in parallel on the button, using the characteristic that the voltage across the capacitor cannot change suddenly, the voltage across the button changes smoothly, thereby removing the jitter of the button signal and better ensuring stability.

5. A method and apparatus for analogously generating a stable virtual taste according to claim 3, characterized in that, The voltage detection circuit has an operational amplification and feedback stabilization module; The operational amplification and feedback stabilization module part includes an operational amplifier, whose non-inverting input terminal is connected to the output node of the voltage division module, and the inverting input terminal is connected to the output ADC1 of the operational amplifier U4 through a resistor R34, and this feedback connection method forms a negative feedback loop.

6. A method and device for analogously generating a stable virtual taste according to claim 3, characterized in that, The power management circuit, in the wired mode, charges the lithium battery through the USB port, and the wireless mode is connected in parallel with it, and is divided into a transmitting and a receiving module. This circuit design has three stabilization units: Power filter stabilization unit: On the power input line, there is a resistor R3, and a large capacitor C1 and a small capacitor C2 are connected in parallel at the power input node; Output terminal stabilization unit: In the output line of the charging module, there is a capacitor C3 connected; Feedback regulation stabilization unit: The circuit includes a resistor R2.

7. A method and apparatus for analogously generating a stable virtual taste according to claim 3, characterized in that, The voltage conversion circuit involves the design of four types of stabilization units, namely, a filtering capacitor stabilization unit, a feedback regulation stabilization unit, a storage inductor and capacitor stabilization unit, and a diode protection stabilization unit; The filtering capacitor stabilization unit includes, at the input and output terminals of the circuit, capacitors C12, C11, C5, and C4 connected in parallel. At the same time, three groups of parallel combinations of large and small capacitors are set, namely C13 and C14, C8 and C9, and C6 and C7. The two groups of large and small capacitors, C6, C7 and C8, C9, are respectively connected to the input and output terminals of chip 3. By utilizing the characteristics of large capacitors passing low frequencies and small capacitors passing high frequencies, it effectively filters out low-frequency and high-frequency noise in the voltage, achieving the stability of the positive and negative power supply voltage outputs; The feedback regulation stabilization unit includes two voltage division circuits set in the circuit. One group consists of resistors R8 and R9, and the other group consists of resistors R6 and R7. The two voltage division circuits together form a feedback network, which is respectively connected to the FB pins of chip 1 and chip 2, and can continuously transmit stable feedback signals to the chip, thereby accurately regulating the chip's regulation of the output voltage and ensuring that the output voltage is stable within the set range; The storage inductor and capacitor stabilization unit includes LC filter structures formed by inductor L1 and capacitor C4, and inductor L2 and capacitor C10 respectively; Relying on the characteristics of inductors suppressing sudden changes in current and capacitors storing and releasing electrical energy, these structures can further smooth the output voltage, significantly reduce ripple interference, and effectively improve the stability of the circuit output; The diode protection stabilization unit includes the setting of multiple diodes (D1 - D4), which prevent voltage backflow and provide signal indication, ensure the unidirectional flow of current in the circuit, and enhance the circuit stability.

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