CN113114198A - Concave embedded type cavity induction key system - Google Patents
Concave embedded type cavity induction key system Download PDFInfo
- Publication number
- CN113114198A CN113114198A CN202110506573.1A CN202110506573A CN113114198A CN 113114198 A CN113114198 A CN 113114198A CN 202110506573 A CN202110506573 A CN 202110506573A CN 113114198 A CN113114198 A CN 113114198A
- Authority
- CN
- China
- Prior art keywords
- voltage
- cavity
- induction
- electric signal
- node
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a concave embedded type cavity induction key system, which relates to the technical field of keys and comprises an installation body, an induction module, a control module and a target electrical appliance, wherein an induction cavity is formed at one end of the installation body in a concave manner, and the induction module is electrically connected with the control module; the induction module is arranged on the mounting body and used for generating a first electric signal after foreign matters enter the induction cavity, the control module is used for generating a second electric signal according to the first electric signal, and the second electric signal is used for controlling the current of the target electrical appliance. The invention has the advantages of high sensitivity, convenient installation and good user experience.
Description
Technical Field
The invention relates to the technical field of keys, in particular to a concave embedded type cavity induction key system.
Background
A key is a commonly used element for controlling an electrical device, and is a switch for turning on or off a 'control circuit' (in which current is small) so as to control an electric motor or other electrical equipment. The existing key is arranged outside the equipment, when the requirement on the flatness of the outer surface of some equipment is high, the setting difficulty is high, extra installation cost is needed, the refitting is not facilitated, and more importantly, the key positioned outside can easily cause external interference, namely, the key is easily touched by mistake, and the stability of the system is not facilitated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a concave embedded type cavity induction key system.
A concave embedded type cavity induction key system comprises an installation body, an induction module, a control module and a target electrical appliance, wherein an induction cavity is formed in the concave part of one end of the installation body, and the induction module is electrically connected with the control module; the induction module is arranged on the mounting body and used for generating a first electric signal after foreign matters enter the induction cavity, the control module is used for generating a second electric signal according to the first electric signal, and the second electric signal is used for controlling the current of the target electrical appliance.
Preferably, the induction module comprises an induction unit and a voltage regulation unit, the voltage regulation unit comprises a voltage stabilizing circuit and a preset resistor, and the induction unit and the preset resistor are connected in series on the voltage stabilizing circuit; the sensing unit is arranged in the sensing cavity, the resistance value of the sensing unit is changed after foreign matters enter the sensing cavity, and the voltage stabilizing circuit is used for changing the voltage of the sensing unit after the resistance value of the sensing unit is changed, so that a first electric signal is generated. The voltage stabilizing circuit is connected with a constant power supply voltage, the induction unit and the preset resistor are connected in series on the voltage stabilizing circuit, the resistance value of the preset resistor is preset, and the voltage of the preset resistor is VaThe voltage of the induction unit is VbIf the voltage value of the voltage stabilizing circuit is not changed, V isaAnd VbThe sum is constant, thus yielding the following: if no foreign matter enters the sensing cavity, the resistance value of the sensing unit is unchanged, so that V isaAnd VbAnd is unchanged to generate the first electrical signal. If the sensing unit enters the foreign matters in the sensing cavity, the resistance value of the sensing unit is increased, and V is obtained on the premise that the resistance value of the preset resistor is constantbIs increased to thereby generate a first electrical signal. If the sensing unit enters the foreign matters in the sensing cavity, the resistance value of the sensing unit is reduced, and V is obtained on the premise that the resistance value of the preset resistor is constantbAnd lowered to thereby generate a first electrical signal. To sum up, through induction element and pressure regulating unit, can detect sensitively and sense the response cavity and whether have the foreign matter, simple structure, reasonable in design exports different first signal of telecommunication and lets follow-up control module group handle to obtain different second signal of telecommunication, and then realize different control results.
Preferably, the control module includes a first power supply and a first NPN transistor, the first NPN transistor is disposed between the first power supply, the voltage stabilizing circuit and the target electrical appliance, the first NPN transistor is configured to generate a second electrical signal according to the first electrical signal, and the second electrical signal is configured to adjust a current between the first power supply and the target electrical appliance.
Preferably, the first NPN triode includes a base, a collector and an emitter, the collector is electrically connected to the first power supply, the emitter is electrically connected to the target electrical appliance, and the base is electrically connected to the voltage stabilizing circuit; the first NPN triode is used for generating a second electric signal after the base voltage is changed, and the second electric signal is also used for adjusting the current between the collector and the emitter. The first NPN triode is arranged among the first power supply, the voltage stabilizing circuit and the target electrical appliance, preferably, the base electrode is connected with the voltage stabilizing circuit and is positioned between the sensing unit and the preset resistor, and the collector electrode is connected with the positive electrode of the first power supply, so that the sensing power supply is connected with the first NPN triode in parallel. When the induction cavity works, if the induction unit enters foreign matters in the induction cavity, the resistance value of the induction unit is increased, and on the premise that the resistance value of the preset resistor is constant, V isbIncreasing the base voltage to increase the base current, amplifying the current between the collector and the emitter by using a current amplification principle of a first NPN triode, and enabling the first power supply to be connected with a target electric appliance if the current is increased from zero; preferably, the foreign matter continuously enters or moves out of the sensing cavity, and if the resistance value of the sensing unit continuously increases, VbIf the current between the collector and the emitter is continuously increased, the current between the collector and the emitter is continuously amplified, that is, the current voltage of the target electrical appliance is continuously increased to the maximum value, so that the conduction control of the target electrical appliance is realized; if the resistance of the sensing unit is continuously reduced, VbThe current between the collector and the emitter is continuously reduced, that is, the current voltage of the target electrical appliance is reduced to the minimum value, so as to cut off the target electrical applianceAnd (5) stopping control. The base electrode is connected with the voltage stabilizing circuit and is positioned between the sensing unit and the preset resistor, but the whole first NPN triode is connected with the preset resistor in parallel unlike the figure, so the whole control process is opposite to the control process. When the induction cavity works, if the induction unit enters foreign matters in the induction cavity, the resistance value of the induction unit is increased, and on the premise that the resistance value of the preset resistor is constant, V isbIncrease, then VaDecrease since the voltage at the base is now equal to VaAnd reducing the base voltage to reduce the base current, and multiplying the current between the collector and the emitter by the current amplification principle of the first NPN triode to gradually stop the target electric appliance. Under the condition, when no foreign matters exist in the whole induction cavity, the current and the voltage of the target electrical appliance are the maximum, so that the target electrical appliance is in the maximum power state, and when the foreign matters are inserted, the power of the target electrical appliance is gradually reduced, so that the induction cavity has a better use prospect in certain application occasions.
Preferably, the control module further includes a second power supply and an operational amplifier, the operational amplifier is disposed between the first power supply, the voltage stabilizing circuit and the target electrical appliance, and the operational amplifier is configured to generate a second electrical signal according to the first electrical signal, and the second electrical signal is configured to adjust an input current of the target electrical appliance.
Preferably, the operational amplifier includes a power supply node, a positive phase node, a negative phase node, a ground node and an output node, the positive phase node is electrically connected to the voltage stabilizing circuit, the negative phase node is electrically connected to the comparing circuit, the power supply node is electrically connected to the second power supply, the ground node is grounded, and the output node is electrically connected to the target electrical appliance; the voltage stabilizing circuit is used for forming a positive-phase voltage at the positive-phase node, the first electric signal is used for adjusting the positive-phase voltage, the comparison circuit is used for forming an inverse-phase voltage at the inverse-phase node, and the operational amplifier is used for comparing the positive-phase voltage with the inverse-phase voltage and generating a second electric signal according to a comparison result; the second electrical signal is for outputting a high voltage at an output node when the positive phase voltage is greater than the negative phase voltage; when the positive phase voltage is greater than the negative phase voltageThe second electrical signal is for outputting a low voltage at the output node at the phase voltage. The operational amplifier is connected in parallel with the whole sensing unit, the grounding node is grounded, and the output node is connected to the target electrical appliance. When the induction cavity works, if the induction unit enters foreign matters in the induction cavity, the resistance value of the induction unit is increased, and on the premise that the resistance value of the preset resistor is constant, V isbAnd if the positive phase voltage is smaller than the reverse phase voltage, outputting a low voltage at the output node, and keeping the target electrical appliance in an off state all the time. The positive phase node is connected with the voltage stabilizing circuit and is positioned between the preset resistor and the sensing unit, but the operational amplifier is connected with the whole preset resistor in parallel. When the induction cavity works and foreign matters in the induction cavity are gradually drawn away, the resistance value of the induction unit is reduced, and V is obtained on the premise that the resistance value of the preset resistor is constantbDecrease, then VaIncrease since the positive phase voltage now equals VaIf the positive phase voltage is higher than the negative phase voltage, the positive phase voltage is directly output at the output node through the comparison principle of the operational amplifier, so that the conduction control of the target electric appliance is realized, otherwise, if the positive phase voltage is lower than the negative phase voltage, the low voltage is output at the output node, and the target electric appliance is always in a power-off state.
Preferably, the sensing unit includes an emitting end and a receiving end, the emitting end is configured to emit an optical signal toward the receiving end, the receiving end is configured to change a resistance value of the receiving end according to the received optical signal, and the voltage stabilizing circuit is configured to change a voltage of the receiving end after the resistance value of the receiving end is changed, so as to generate the first electrical signal. Preferably, the receiving end is a photo resistor, and when the optical signal emitted from the emitting end is received, the resistance value of the receiving end is reduced, and when the optical signal emitted from the emitting end cannot be received, the resistance value of the receiving end is increased, so that a subsequent control process is realized.
Preferably, the receiving end and the transmitting end are opposite to each other, and the sensing cavity is located between the receiving end and the transmitting end. When the transmitting end is right opposite to the receiving end, when foreign matters enter the sensing cavity between the transmitting end and the receiving end, optical signals received by the receiving end are immediately reduced, so that high-sensitivity feedback is realized, and the subsequent control process is smoothly carried out. Meanwhile, it should be noted that, in this arrangement, in a normal state, that is, when there is no foreign matter in the sensing cavity, the receiving terminal always receives the most optical signals, and the resistance value of the receiving terminal is at the maximum value, which means that the target electrical appliance is at a certain critical value, for example, at a start state in a maximum power state or at an off-stop state.
Preferably, the receiving end and the transmitting end are arranged in a staggered manner, and the receiving end is used for receiving the optical signal reflected by the foreign matter in the sensing cavity. When the transmitting end is not just opposite to the receiving end, when foreign matters enter the sensing cavity between the transmitting end and the receiving end, the foreign matters can reflect the optical signals sent by the transmitting end, so that the receiving end receives the optical signals, high-sensitivity feedback is realized, and the subsequent control process is smoothly carried out. Meanwhile, it should be noted that in this arrangement, in a normal state, that is, when there is no foreign matter in the sensing cavity, the receiving terminal does not receive the optical signal all the time, and the resistance value of the receiving terminal is at the minimum value, which means that the target electrical appliance is at a certain critical value, for example, at a start state in a maximum power state or at an off-stop state.
Preferably, the induction module comprises a microwave controller, the control module comprises a third power supply, a second NPN transistor and a switching circuit, the switching circuit is electrically connected with the third power supply and the microwave controller, and the second NPN transistor is arranged among the switching circuit, the third power supply and the target appliance; the microwave controller is used for transmitting electromagnetic waves into the induction cavity, receiving echoes reflected by foreign matters in the induction cavity and generating a first electric signal after receiving the echoes; the switch circuit is used for switching on or switching off a third power supply and a second NPN triode after receiving the first electric signal; the second NPN triode is used for generating a second electric signal according to the first electric signal, and the second electric signal is used for adjusting the current between a third power supply and the target electric appliance after the third power supply and the second NPN triode are connected. Similarly, the microwave controller transversely transmits high-frequency electromagnetic waves into the induction cavity and receives echoes of the high-frequency electromagnetic waves so as to induce the movement of an object entering the induction cavity, if foreign matters enter the induction cavity, the microprocessor is triggered to execute a microwave controller instruction, on one hand, the switching circuit is controlled to be switched on and switched off, and after the switching circuit is switched off, the third power supply is switched on with the second NPN triode, further, under the condition, if the microwave controller controls the base current of the second NPN triode to be increased, the current between the collector and the emitter of the second NPN triode is increased, so that the voltage current of the target electric appliance is increased, so that the conduction control is completed, and on the other hand, if the microwave controller controls the base current of the second NPN triode to be decreased, the current between the collector and the emitter of the second NPN triode is decreased, so that the voltage current of the target electric appliance is decreased, thereby completing the stop control.
The invention has the beneficial effects that:
in the invention, the keys are arranged in the equipment, so that the flatness of the surface of the equipment is improved, the installation difficulty is reduced, the equipment is favorably modified, the whole key system is hidden, the external interference is less, the stability of the system is favorably realized, the reliability of the keys is improved, the service life of the keys is prolonged, more importantly, the response is extremely sensitive, the equipment can be started without being inserted and started after being inserted, the equipment can be started and stopped without being contacted, and the operation experience is improved, and the equipment can be accepted by users in the current epidemic situation popular times.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of a module according to the present invention;
FIG. 2 is a schematic structural diagram of the present invention when the transmitting end and the receiving end are disposed opposite to each other;
FIG. 3 is a cross-sectional view of the transmitter and receiver of the present invention in a configuration in which they are disposed opposite to each other;
FIG. 4 is a schematic view of the structure of FIG. 3 with a foreign object entering the sensing cavity according to the present invention;
FIG. 5 is a circuit diagram of a first NPN transistor connected in parallel with an inductive element according to the present invention;
FIG. 6 is a circuit diagram of an operational amplifier and a sensing unit connected in parallel according to the present invention;
FIG. 7 is a schematic structural diagram of the present invention when the transmitting end and the receiving end are not arranged opposite to each other;
FIG. 8 is a cross-sectional view of the transmitter and receiver in a non-aligned configuration in accordance with the present invention;
FIG. 9 is a schematic view of the sensor of FIG. 8 with a foreign object entering the sensor cavity according to the present invention;
fig. 10 is a circuit diagram of a first NPN transistor according to the present invention connected in parallel with a predetermined resistor;
FIG. 11 is a circuit diagram of the operational amplifier of the present invention connected in parallel with a predetermined resistor;
FIG. 12 is a schematic view of the microwave controller of the present invention operating in the sensing cavity;
FIG. 13 is a circuit diagram of the microwave controller electrically connected to the control module according to the present invention.
Reference numerals:
1-a mounting body, 11-a sensing cavity, 2-a sensing module, 21-a sensing unit, 211-an emitting end, 212-a receiving end, 22-a voltage regulating unit, 221-a voltage stabilizing circuit, 222-a preset resistor, 23-a microwave controller, 3-a control module, 31-a first power supply, 32-a first NPN triode, 321-a base, 322-a collector, 323-an emitter, 33-a second power supply, 34-an operational amplifier, 341-a power supply node, 342-a positive phase node, 343-a reverse phase node, 344-a ground node, 345-an output node, 35-a comparison circuit, 36-a third power supply, 37-a second NPN triode, 38-a switching circuit, 4-a target electrical appliance and 5-a foreign object.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally arranged when products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operated, and thus, cannot be construed as limiting the present invention.
As shown in fig. 1 to 13, a recessed embedded cavity sensing key system includes an installation body 1, a sensing module 2, a control module 3 and a target electrical appliance 4, wherein a sensing cavity 11 is formed at one end of the installation body 1, and the sensing module 2 is electrically connected to the control module 3; wherein, response module 2 sets up on installation body 1 for get into behind foreign matter 5 the first signal of generating in response cavity 11, control module 3 is used for generating the second signal of generating according to first signal of electric, and the second signal of electric is used for controlling the electric current size of inserting target electrical apparatus 4.
In the present embodiment, it should be noted that, in the whole system, the installation body 1 can be inserted into the inside of the device, and the sensing cavity 11 formed by the inner recess constitutes a sensing key system. Specifically, when a user's finger or any other object penetrates into the sensing cavity 11, the sensing module 2 can detect the internal change of the sensing cavity 11, thereby generating a feedback and generating a first electric signal, wherein the feedback obtained by the sensing module 2 can be an optical feedback, a temperature feedback, an infrared feedback, a pressure feedback or a microwave feedback, etc., further, the control module 3 receives the first electric signal and generates a second electric signal according to the current first electric signal, thereby controlling the current size of the access target electric appliance 4, wherein the current size is the lowest 0A, the highest current size is preset according to the access current of the control module 3, and meanwhile, since the first electric signal is changed in real time, the current size of the target electric appliance 4 can be changed in real time. To sum up, through setting up the button inside equipment, the roughness on equipment surface has been improved, reduce the installation degree of difficulty, be favorable to the equipment repacking, and whole key system hides, it is few to receive external disturbance, be favorable to the stability of system, improve the reliability and the life of button, more crucial, through the induction type feedback of button in-process, not only the reaction is extremely sensitive, accomplish not inserting and not starting, insert and start promptly, can also accomplish contactless start-up and stop equipment, also can be accepted by the masses of users in the era that current epidemic situation is popular when improving operation experience.
Specifically, the sensing module 2 includes a sensing unit 21 and a voltage regulating unit 22, the voltage regulating unit 22 includes a voltage stabilizing circuit 221 and a preset resistor 222, and the sensing unit 21 and the preset resistor 222 are connected in series to the voltage stabilizing circuit 221; the sensing unit 21 is disposed in the sensing cavity 11, the sensing unit 21 is configured to change a resistance value of the sensing unit 21 after the foreign object 5 enters the sensing cavity 11, and the voltage stabilizing circuit 221 is configured to change a voltage of the sensing unit 21 after the resistance value of the sensing unit 21 is changed, so as to generate a first electrical signal.
In this embodiment, it should be noted that, the voltage regulator circuit 221 is connected to a constant power voltage, and since the sensing unit 21 and the preset resistor 222 are connected in series to the voltage regulator circuit 221, the resistance of the preset resistor 222 is preset, wherein the voltage of the preset resistor 222 is VaThe voltage of the induction unit 21 is VbIf the voltage value of the voltage stabilizing circuit 221 is not changed, then VaAnd VbThe sum is constant, thus yielding the following:
if no foreign matter 5 enters the sensing cavity 11, the resistance value of the sensing unit 21 is not changed, so that VaAnd VbAnd is unchanged to generate the first electrical signal.
If the sensing unit 21 enters the foreign object 5 in the sensing cavity 11, the resistance of the sensing unit 21 increases, and V is constant under the premise that the resistance of the preset resistor 222 is constantbIs increased to thereby generate a first electrical signal.
If the sensing unit 21 enters the foreign object 5 in the sensing cavity 11, the resistance of the sensing unit 21 decreases, and V is constant under the premise that the resistance of the preset resistor 222 is constantbAnd lowered to thereby generate a first electrical signal.
To sum up, through induction element 21 and pressure regulating unit 22, can sensitively detect and sense whether response cavity 11 has foreign matter 5, simple structure, reasonable in design exports different first signal of telecommunication and lets follow-up control module 3 handle to obtain different second signal of telecommunication, and then realize different control results.
Specifically, the control module 3 includes a first power source 31 and a first NPN transistor 32, the first NPN transistor 32 is disposed between the first power source 31, the voltage stabilizing circuit 221, and the target electrical appliance 4, and the first NPN transistor 32 is configured to generate a second electrical signal according to the first electrical signal, and the second electrical signal is configured to adjust a current between the first power source 31 and the target electrical appliance 4.
Specifically, the first NPN transistor 32 includes a base 321, a collector 322, and an emitter 323, the collector 322 is electrically connected to the first power source 31, the emitter 323 is electrically connected to the target electrical apparatus 4, and the base 321 is electrically connected to the voltage regulator circuit 221; the first electrical signal is used to change the voltage of the base 321, and the first NPN transistor 32 is further used to generate a second electrical signal after the voltage of the base 321 is changed, and the second electrical signal is further used to adjust the current magnitude between the collector 322 and the emitter 323.
In the present embodiment, it should be noted that the first NPN transistor 32 is disposed between the first power supply 31, the voltage regulator 221 and the target electrical apparatus 4, specifically, as shown in fig. 5, wherein the base 321 is connected to the voltage regulator 221 and is located between the sensing unit 21 and the preset resistor 222, and the collector 322 is connected to the positive pole of the first power supply 31, so that the sensing power is connected in parallel to the first NPN transistor 32. In operation, if the sensing unit 21 enters the foreign object 5 in the sensing cavity 11, the resistance of the sensing unit 21 increases, and V is equal to V on the premise that the resistance of the preset resistor 222 is constantbIf the voltage of the base 321 is increased, so that the current of the base 321 is increased, the current between the collector 322 and the emitter 323 is amplified according to the current amplification principle of the first NPN triode, and if the current is increased from zero, the first power supply 31 is connected to the target electrical appliance 4, and it should be noted that the resistance value of the sensing unit 21 is increased or decreased according to the degree of the foreign object 5 entering the sensing cavity 11; specifically, the foreign object 5 continuously enters or moves out of the sensing cavity 11, and if the resistance value of the sensing unit 21 continuously increases, VbThe current between the collector 322 and the emitter 323 is continuously amplified, that is, the current voltage of the target electrical appliance 4 is increased to the maximum value, so as to control the target electrical appliance 4 to be turned on; if the resistance of the sensing unit 21 is continuously decreased, VbThe current between the collector 322 and the emitter 323 is continuously reduced, that is, the current voltage of the target appliance 4 is reduced to the minimum value, so as to realize the shutdown control of the target appliance 4.
It should be noted that, as shown in fig. 10, the base 321 is connected to the voltage regulator 221 and located between the sensing unit 21 and the preset resistor 222, but unlike the figure, the whole first NPN transistor 32 and the preset resistor 2 are connected to each other22 are connected in parallel, and therefore the entire control process is reversed from that described above. In operation, if the sensing unit 21 enters the foreign object 5 in the sensing cavity 11, the resistance of the sensing unit 21 increases, and V is equal to V on the premise that the resistance of the preset resistor 222 is constantbIncrease, then VaDecrease since the voltage at the base 321 now equals VaThen, the voltage of the base 321 is decreased so that the current of the base 321 is decreased, and the current between the collector 322 and the emitter 323 is doubled by the current amplification principle of the first NPN triode, so that the target electrical apparatus 4 is gradually turned off. In this case, when there is no foreign matter 5 in the whole sensing cavity 11, the current and voltage of the target electrical appliance 4 are the largest, so that the target electrical appliance 4 is in the maximum power state, and when the foreign matter 5 is inserted, the power of the target electrical appliance 4 is gradually reduced, so that the sensing cavity has a good application prospect in some application occasions.
Specifically, the control module 3 further includes a second power supply 33 and an operational amplifier 34, the operational amplifier 34 is disposed between the first power supply 31, the voltage stabilizing circuit 221 and the target electrical appliance 4, and the operational amplifier 34 is configured to generate a second electrical signal according to the first electrical signal, and the second electrical signal is configured to adjust an input current of the target electrical appliance 4.
Specifically, the operational amplifier 34 includes a power supply node 341, a positive phase node 342, an inverse phase node 343, a ground node 344, and an output node 345, wherein the positive phase node 342 is electrically connected to the voltage stabilizing circuit 221, the inverse phase node 343 is electrically connected to the comparing circuit 35, the power supply node 341 is electrically connected to the second power supply 33, the ground node 344 is connected to the ground, and the output node 345 is electrically connected to the target electrical appliance 4; the voltage stabilizing circuit 221 is configured to form a positive-phase voltage at the positive-phase node 342, the first electrical signal is configured to adjust the magnitude of the positive-phase voltage, the comparing circuit 35 is configured to form an inverted-phase voltage at the inverted-phase node 343, and the operational amplifier 34 is configured to compare the magnitudes of the positive-phase voltage and the inverted-phase voltage and generate a second electrical signal according to the comparison result; when the positive phase voltage is greater than the negative phase voltage, the second electrical signal is used to output a high voltage at the output node 345; when the positive phase voltage is greater than the negative phase voltage, the second electrical signal is used to output a low voltage at the output node 345.
In this embodiment, LM358 can be used as the operational amplifier 34, and similarly, the operational amplifier 34 is providedBetween the second power supply 33, the stabilizing circuit 221 and the target electrical appliance 4, specifically, as shown in fig. 6, wherein the power supply node 341 is connected to the second power supply 33, the inverting node 343 is connected to the comparing circuit 35, the comparing circuit 35 inputs the inverted voltage at the inverting node 343, the non-inverting node 342 is connected to the stabilizing circuit 221 and is located between the preset resistor 222 and the sensing unit 21, while the operational amplifier 34 is connected in parallel to the entire sensing unit 21, while the ground node 344 is grounded, and the output node 345 is connected to the target electrical appliance 4. In operation, if the sensing unit 21 enters the foreign object 5 in the sensing cavity 11, the resistance of the sensing unit 21 increases, and V is equal to V on the premise that the resistance of the preset resistor 222 is constantbIf the positive voltage is greater than the negative voltage, the positive voltage at the positive node 342 is increased, and according to the comparison principle of the operational amplifier 34, when the positive voltage is greater than the negative voltage, the high voltage is directly output at the output node 345, so that the target electrical appliance 4 is turned on and controlled, otherwise, as long as the positive voltage is less than the negative voltage, the low voltage is output at the output node 345, and the target electrical appliance 4 is always in the off state.
It should be noted that, as shown in fig. 11, the non-inverting node 342 is connected to the voltage stabilizing circuit 221 and located between the preset resistor 222 and the sensing unit 21, but the operational amplifier 34 is connected in parallel with the whole preset resistor 222. When the sensing cavity 11 is operated, the resistance of the sensing unit 21 is reduced when the foreign object 5 is gradually drawn out, and V is set as the resistance of the preset resistor 222 is constantbDecrease, then VaIncrease since the positive phase voltage now equals VaIf the positive-phase voltage is greater than the negative-phase voltage, the comparison principle of the operational amplifier 34 is used, and if the positive-phase voltage is greater than the negative-phase voltage, the high voltage is directly output at the output node 345, so that the target electrical appliance 4 is turned on and controlled, whereas if the positive-phase voltage is less than the negative-phase voltage, the low voltage is output at the output node 345, and the target electrical appliance 4 is always in the off state.
Specifically, the sensing unit 21 includes an emitting end 211 and a receiving end 212, the emitting end 211 is configured to emit a light signal toward the receiving end 212, the receiving end 212 is configured to change its resistance value according to the received light signal, and the voltage stabilizing circuit 221 is configured to change a voltage of the receiving end 212 after the receiving end 212 changes its resistance value, so as to generate a first electrical signal.
In this embodiment, it should be noted that, preferably, the receiving end 212 is a photo resistor, and when receiving the optical signal emitted from the emitting end 211, the resistance value of the receiving end is decreased, and when the optical signal emitted from the emitting end 211 cannot be received, the resistance value of the receiving end is increased, so as to implement the subsequent control process.
Specifically, the receiving end 212 and the transmitting end 211 are opposite to each other, and the sensing cavity 11 is located between the receiving end 212 and the transmitting end 211.
In this embodiment, it should be noted that when the transmitting end 211 is directly facing the receiving end 212, and the foreign object 5 enters the sensing cavity 11 between the transmitting end 211 and the receiving end 212, the optical signal received by the receiving end 212 is immediately reduced, so as to implement high-sensitivity feedback and enable the subsequent control process to be smoothly performed. It should be noted that, in this arrangement, in a normal state, that is, when there is no foreign object 5 in the sensing cavity 11, the receiving terminal 212 always receives the maximum optical signal, and the resistance value of the receiving terminal 212 is at the maximum value, which means that the target electrical appliance 4 is at a certain critical value, for example, at a start state in a maximum power state, or at an off-stop state.
Specifically, the receiving end 212 and the transmitting end 211 are disposed at an offset position, and the receiving end 212 is used for receiving the optical signal reflected by the foreign object 5 in the sensing cavity 11.
In this embodiment, it should be noted that, when the transmitting end 211 is not directly opposite to the receiving end 212, when the foreign object 5 enters the sensing cavity 11 between the transmitting end 211 and the receiving end 212, the foreign object reflects the optical signal emitted by the transmitting end 211, so that the receiving end 212 receives the optical signal, thereby implementing high-sensitivity feedback and enabling the subsequent control process to be performed smoothly. It should be noted that, in this arrangement, in a normal state, that is, when there is no foreign object 5 in the sensing cavity 11, the receiving terminal 212 does not receive the optical signal all the time, and the resistance value of the receiving terminal 212 is at the minimum value, thereby indicating that the target electrical appliance 4 is at a certain critical value, for example, at a start state in a maximum power state, or at an off-stop state.
Specifically, the induction module 2 comprises a microwave controller 23, the control module 3 comprises a third power supply 36, a second NPN transistor 37 and a switching circuit 38, the switching circuit 38 is electrically connected to the third power supply 36 and the microwave controller 23, and the second NPN transistor 37 is disposed between the switching circuit 38, the third power supply 36 and the target electrical appliance 4; the microwave controller 23 is configured to emit electromagnetic waves into the sensing cavity 11, receive echoes reflected by the foreign object 5 in the sensing cavity 11, and generate a first electrical signal after receiving the echoes; the switching circuit 38 is configured to turn on or off the third power supply 36 and the second NPN transistor 37 after receiving the first electrical signal; the second NPN transistor 37 is configured to generate a second electrical signal according to the first electrical signal, and the second electrical signal is configured to adjust a current between the third power source 36 and the target electrical appliance 4 after the third power source 36 and the second NPN transistor 37 are turned on.
In the present embodiment, it should be noted that, similarly, as shown in fig. 12 and 13, the microwave controller 23 laterally emits high-frequency electromagnetic waves into the sensing cavity 11, and receives echoes thereof to sense movement of an object entering the sensing cavity 11, if a foreign object 5 enters, the microprocessor is triggered to execute a command of the microwave controller 23, on one hand, to control the switching circuit 38 to be opened and closed, and if the switching circuit 38 is closed, the third power supply 36 is connected to the second NPN transistor 37, and further, under this condition, if the microwave controller 23 controls the base current of the second NPN transistor to increase, the current between the collector and the emitter of the second NPN transistor is increased, so that the voltage current of the target electrical appliance 4 is increased, thereby completing the conduction control, and conversely, if the microwave controller 23 controls the base current of the second NPN transistor to decrease, the current between the collector and the emitter of the second NPN triode is decreased so that the voltage current of the target electric appliance 4 is decreased, thereby completing the shutdown control.
It should be noted that the shape of the inner wall of the whole sensing cavity 11 can be freely set, and the opening formed by the inner recess can be oval, circular, polygonal or irregular, etc.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. A concave embedded type cavity induction key system is characterized by comprising an installation body, an induction module, a control module and a target electrical appliance, wherein an induction cavity is formed at one end of the installation body in a concave mode, and the induction module is electrically connected with the control module; wherein the content of the first and second substances,
the induction module is arranged on the mounting body and used for generating a first electric signal after entering foreign matters in the induction cavity, the control module is used for generating a second electric signal according to the first electric signal, and the second electric signal is used for controlling the current of the target electrical appliance.
2. The recessed embedded type cavity induction key system as claimed in claim 1, wherein the induction module comprises an induction unit and a voltage regulation unit, the voltage regulation unit comprises a voltage regulation circuit and a preset resistor, and the induction unit and the preset resistor are connected in series on the voltage regulation circuit; wherein the content of the first and second substances,
the sensing unit is arranged in the sensing cavity and used for changing the resistance value of the sensing unit after foreign matters enter the sensing cavity, and the voltage stabilizing circuit is used for changing the voltage of the sensing unit after the resistance value of the sensing unit is changed, so that a first electric signal is generated.
3. The cavity induction key system as claimed in claim 2, wherein the control module comprises a first power supply and a first NPN transistor, the first NPN transistor is disposed between the first power supply, the voltage regulator circuit and the target electrical appliance, the first NPN transistor is configured to generate a second electrical signal according to the first electrical signal, and the second electrical signal is configured to adjust a current level between the first power supply and the target electrical appliance.
4. The cavity induction key system as claimed in claim 3, wherein said first NPN transistor comprises a base, a collector and an emitter, said collector is electrically connected to said first power source, said emitter is electrically connected to said target electrical device, and said base is electrically connected to said voltage regulator circuit; wherein the content of the first and second substances,
the first NPN triode is used for changing the base voltage, and the first NPN triode is also used for generating a second electric signal after the base voltage is changed, and the second electric signal is also used for adjusting the current between the collector and the emitter.
5. The cavity-sensing key system as claimed in claim 3, wherein the control module further comprises a second power supply and an operational amplifier, the operational amplifier is disposed between the first power supply, the voltage regulator circuit and the target electrical appliance, the operational amplifier is configured to generate a second electrical signal according to the first electrical signal, and the second electrical signal is configured to regulate an input current of the target electrical appliance.
6. The cavity induction key system as claimed in claim 5, wherein the operational amplifier comprises a power node, a positive phase node, a negative phase node, a ground node and an output node, the positive phase node is electrically connected to the voltage stabilizing circuit, the negative phase node is electrically connected to the comparing circuit, the power node is electrically connected to the second power source, the ground node is connected to ground, and the output node is electrically connected to the target electrical device; wherein the content of the first and second substances,
the voltage stabilizing circuit is used for forming a normal phase voltage at the normal phase node, the first electric signal is used for adjusting the magnitude of the normal phase voltage, the comparison circuit is used for forming an inverse phase voltage at the inverse phase node, and the operational amplifier is used for comparing the magnitudes of the normal phase voltage and the inverse phase voltage and generating a second electric signal according to a comparison result;
the second electrical signal is for outputting a high voltage at an output node when the positive phase voltage is greater than the negative phase voltage;
the second electrical signal is for outputting a low voltage at an output node when the positive phase voltage is greater than the negative phase voltage.
7. The recessed cavity sensing key system according to any one of claims 2 to 6, wherein the sensing unit comprises an emitting end and a receiving end, the emitting end is used for emitting a light signal towards the receiving end, the receiving end is used for changing its resistance value according to the received light signal, and the voltage regulator circuit is used for changing the voltage of the receiving end after the receiving end changes its resistance value, so as to generate the first electrical signal.
8. The cavity-in-cavity induction key system as recited in claim 7, wherein said receiving end and said emitting end are opposite to each other, said induction cavity being located between said receiving end and said emitting end.
9. The recessed cavity sensor key system of claim 8, wherein the receiving end and the emitting end are disposed in a staggered manner, and the receiving end is configured to receive an optical signal reflected by a foreign object in the sensing cavity.
10. The cavity-in-cavity induction key system as recited in claim 1, wherein said induction module comprises a microwave controller, said control module comprises a third power source, a second NPN transistor, and a switching circuit, said switching circuit electrically connecting said third power source and said microwave controller, said second NPN transistor disposed between said switching circuit, said third power source, and said target appliance;
the microwave controller is used for transmitting electromagnetic waves into the induction cavity, receiving echoes reflected by foreign matters in the induction cavity and generating a first electric signal after receiving the echoes;
the switch circuit is used for switching on or switching off a third power supply and a second NPN triode after receiving the first electric signal;
the second NPN triode is used for generating a second electric signal according to the first electric signal, and the second electric signal is used for adjusting the current between a third power supply and the target electric appliance after the third power supply and the second NPN triode are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110506573.1A CN113114198B (en) | 2021-05-10 | 2021-05-10 | Concave embedded type cavity induction key system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110506573.1A CN113114198B (en) | 2021-05-10 | 2021-05-10 | Concave embedded type cavity induction key system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113114198A true CN113114198A (en) | 2021-07-13 |
| CN113114198B CN113114198B (en) | 2023-01-03 |
Family
ID=76721753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110506573.1A Active CN113114198B (en) | 2021-05-10 | 2021-05-10 | Concave embedded type cavity induction key system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113114198B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2689619Y (en) * | 2004-05-11 | 2005-03-30 | 安婧 | Non-contact dialing telephones |
| EP2202856A2 (en) * | 2008-12-24 | 2010-06-30 | Merten GmbH & Co. KG | Electric installation device |
| CN102411831A (en) * | 2011-07-22 | 2012-04-11 | 北京中水科水电科技开发有限公司 | Card pulling-out prompting system in campus water room and using method thereof |
| WO2013159476A1 (en) * | 2012-04-26 | 2013-10-31 | 青岛海信信芯科技有限公司 | Multichannel led backlight source drive circuit, and liquid crystal display device using same |
| CN203706005U (en) * | 2013-12-16 | 2014-07-09 | 西安Tcl软件开发有限公司 | Voltage stabilizing circuit |
| JP2015226732A (en) * | 2014-06-03 | 2015-12-17 | タイガー魔法瓶株式会社 | rice cooker |
| CN206803428U (en) * | 2017-05-10 | 2017-12-26 | 南京搜新智能科技有限公司 | A kind of intelligent hotel control system |
| CN206894969U (en) * | 2017-04-26 | 2018-01-16 | 常熟理工学院 | The intelligent power saving switch of radio frequency identification |
| CN110011675A (en) * | 2019-04-11 | 2019-07-12 | 上海古鳌电子科技股份有限公司 | A kind of intelligence boot low frequencies trigger |
| CN209959606U (en) * | 2019-03-27 | 2020-01-17 | 江苏力速达液压有限公司 | Ultrasonic induction automatic control hydraulic cylinder |
-
2021
- 2021-05-10 CN CN202110506573.1A patent/CN113114198B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2689619Y (en) * | 2004-05-11 | 2005-03-30 | 安婧 | Non-contact dialing telephones |
| EP2202856A2 (en) * | 2008-12-24 | 2010-06-30 | Merten GmbH & Co. KG | Electric installation device |
| CN102411831A (en) * | 2011-07-22 | 2012-04-11 | 北京中水科水电科技开发有限公司 | Card pulling-out prompting system in campus water room and using method thereof |
| WO2013159476A1 (en) * | 2012-04-26 | 2013-10-31 | 青岛海信信芯科技有限公司 | Multichannel led backlight source drive circuit, and liquid crystal display device using same |
| CN203706005U (en) * | 2013-12-16 | 2014-07-09 | 西安Tcl软件开发有限公司 | Voltage stabilizing circuit |
| JP2015226732A (en) * | 2014-06-03 | 2015-12-17 | タイガー魔法瓶株式会社 | rice cooker |
| CN206894969U (en) * | 2017-04-26 | 2018-01-16 | 常熟理工学院 | The intelligent power saving switch of radio frequency identification |
| CN206803428U (en) * | 2017-05-10 | 2017-12-26 | 南京搜新智能科技有限公司 | A kind of intelligent hotel control system |
| CN209959606U (en) * | 2019-03-27 | 2020-01-17 | 江苏力速达液压有限公司 | Ultrasonic induction automatic control hydraulic cylinder |
| CN110011675A (en) * | 2019-04-11 | 2019-07-12 | 上海古鳌电子科技股份有限公司 | A kind of intelligence boot low frequencies trigger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113114198B (en) | 2023-01-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7199783B2 (en) | Wake-up detection method and apparatus embodying the same | |
| EP0537845B1 (en) | Suction tube handgrip comprising a capacitive sensor remote control circuit | |
| EP3611601B1 (en) | Electronic device for controlling communication connection with input device and method of controlling same | |
| US8174500B2 (en) | Temperature controlled mouse | |
| JP2005517333A (en) | Method for operating a remotely controllable device | |
| CN111987761A (en) | Charging device, and control method and device of charging equipment | |
| CN113114198B (en) | Concave embedded type cavity induction key system | |
| US7566859B2 (en) | Infrared ray switching device | |
| CN110708219A (en) | Household appliance control method and household appliance | |
| CN111106820B (en) | Touch key control system and control method thereof | |
| KR20020009760A (en) | The touch switch | |
| CN210769429U (en) | Hand-held fan | |
| CN216131447U (en) | Flow regulating faucet | |
| TW201027401A (en) | Temperature control mouse | |
| KR100225625B1 (en) | Controlling apparatus of heating temperature for microwave oven | |
| CN216527128U (en) | Cooking equipment and touch device thereof | |
| KR20150075874A (en) | Energy saving electric fan using smart phone and ultrasonic sensor | |
| CN211906033U (en) | Gesture switch | |
| CN215833618U (en) | Accurate range finding circuit | |
| CN219918901U (en) | Switching device and power utilization system | |
| CN215763556U (en) | Multifunctional faucet | |
| CN216793039U (en) | Doorbell awakening device | |
| TWI505639B (en) | Touch switch and operation method thereof | |
| US20220381852A1 (en) | Load control device having miswire detection | |
| WO2022115587A1 (en) | Touchless feedback device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |