CN111711255A - Method for reducing energy consumption of semi-active RFID equipment - Google Patents
Method for reducing energy consumption of semi-active RFID equipment Download PDFInfo
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- CN111711255A CN111711255A CN202010697140.4A CN202010697140A CN111711255A CN 111711255 A CN111711255 A CN 111711255A CN 202010697140 A CN202010697140 A CN 202010697140A CN 111711255 A CN111711255 A CN 111711255A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0025—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement consisting of a wireless interrogation device in combination with a device for optically marking the record carrier
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a method for reducing energy consumption of semi-active RFID equipment, which comprises an energy storage circuit, a transmission circuit and a charging circuit, wherein the energy storage circuit is provided with a ground sensing coil and an energy storage coil, the energy storage coil is independently arranged on the transmission circuit, an energy storage capacitor is arranged in the transmission circuit in parallel with the energy storage coil, the energy storage capacitor is connected into the charging circuit, the energy storage capacitor transmits the electric energy stored in the energy storage capacitor to the charging circuit through the transmission circuit after pressurizing the electric energy, and a storage battery is charged under the action of the charging circuit; the invention can well reduce energy consumption, continuously charge the storage battery to keep a process of decreasing electric quantity in the using and charging processes, can use one storage battery for a long time until the electric energy can not be effectively supplemented, prolongs the replacing period of the storage battery, ensures that the storage battery can consume as much as possible in the service life, and avoids the waste of resources and energy.
Description
Technical Field
The invention relates to the technical field of RFID (radio frequency identification devices), in particular to a method for reducing energy consumption of semi-active RFI D (radio frequency identification) equipment.
Background
Semi-active RFID is also called low frequency activation triggering technology. Under the normal condition, the semi-active RFID product is in a dormant state, only the part of the tag for keeping data is powered, so that the power consumption is low, the power consumption can be maintained for a long time, after the tag enters the identification range of a radio frequency identification reader, the reader firstly uses 125KHz low-frequency signals to accurately activate the tag in a small range to enable the tag to enter a working state, and then carries out information transmission with the tag through 2.4GHz microwaves, namely, firstly uses the low-frequency signals to accurately position, and then uses the high-frequency signals to quickly transmit data. The common application scenarios are as follows: in a large range covered by a high-frequency signal, a plurality of low-frequency readers are arranged at different positions for activating semi-active RFID products, so that positioning is completed, and information acquisition and transmission are realized.
The semi-active RFID radio frequency is between the passive RFID technology and the active RFID technology, two power supplies are connected in the semi-active RFID, one is alternating current for providing energy for a reader, the power consumption is huge when the active reader works, therefore, a direct current is needed to be added when the active reader does not work for timely awakening in a dormant state, the RFID is usually installed at a higher position, when the semi-active RFID with a battery is adopted, the storage battery needs to be replaced regularly, otherwise, the reader cannot be awakened timely, and therefore corresponding functions cannot be completed.
For the problem of semi-active RFID, if the charging structure of the storage battery is directly connected to the alternating current, the storage battery is charged all the time due to sufficient alternating current electric energy, the service life of the storage battery is reduced due to frequent and alternate charging and discharging, and the mode still needs to consume a large amount of electric energy and cannot well reduce energy consumption, so that a current which can be generated when the semi-active RFID is awakened to work is needed, the current can be absorbed and stored, and finally the electric energy is transmitted to the storage battery through a complete circuit, so that the charging function is completed.
Disclosure of Invention
The invention aims to provide a method for reducing energy consumption of a semi-active RFID device, which overcomes the problems or at least partially solves the problems, so that the problems that a semi-active RFID storage battery is troublesome to maintain, and the storage battery cannot timely supplement the energy consumption are solved.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a method for reducing energy consumption of semi-active RFID equipment, which comprises an energy storage circuit, a transmission circuit and a charging circuit, wherein the energy storage circuit is provided with a ground sensing coil and an energy storage coil, the ground sensing coil is arranged underground at the identification position of an RFID reader, the energy storage circuit connected with the ground sensing coil is arranged on the ground below the RFID reader, the energy storage circuit is connected with a storage battery of the RFID reader through a lead, the energy storage coil is independently arranged on the transmission circuit, the transmission circuit is internally provided with an energy storage capacitor in parallel with the energy storage coil, the energy storage capacitor is connected into the charging circuit, the energy storage capacitor pressurizes the electric energy stored in the energy storage circuit and then transmits the electric energy to the charging circuit through the transmission circuit, and the storage battery is charged under the action of the charging circuit; the method comprises the following specific steps:
the ground induction coil generates a magnetic field through instantaneous movement so as to generate current, the induced current is weak, and the induced current needs to be stored through another energy storage coil;
the ground induction coil generates current which is transmitted to the energy storage coil in the lead, and the energy storage capacitor is connected in parallel with the energy storage coil in the transmission circuit;
the energy storage coil is impacted by a large amount of weak current, the current is gathered into larger current and voltage in the energy storage coil, when the current in the energy storage coil reaches the electric energy capable of puncturing the energy storage capacitor once, the energy storage coil reversely releases the electric energy, the current punctures the energy storage capacitor after the rectification action of the rectifier, so that the electric energy is stored in the energy storage capacitor, and the rectifier is a device for converting alternating current into direct current;
under the condition that charging is completed, the energy storage capacitor immediately releases electric energy to the charging circuit through the resonant circuit, and the charging circuit releases the electric energy to a storage battery capable of receiving the electric energy under the combined action of the resonant circuit and the filter capacitor.
As a further aspect of the present invention, the winding of the ground induction coil is greater than 20 turns, and the ground induction coil adopts a three-dimensional conical winding manner.
As a further aspect of the present invention, an adjustable resistor is disposed in the transmission circuit, and when the local inductance coil acts on the energy storage coil, the resistance value is zero, and when the energy storage coil acts in the reverse direction, the resistance value is the maximum, and the maximum resistance value is greater than the resistance value of the transmission circuit.
As a further scheme of the invention, partial pilot current of the ground induction coil enters a resistor, the pulse of the resistor is triggered to reach a zero position, and the resistor is reset to a maximum position after subsequent current passes through the resistor and enters the energy storage coil.
As a further scheme of the invention, the ground induction coil L and the battery B are respectively arranged at two ends of the complete circuit, and the resonant circuit is respectively provided with two capacitors C1 and C2 which are connected with the energy storage capacitor in parallel.
As a further aspect of the present invention, the value of the capacitor C1 is greater than the value of the capacitor C2.
As a further aspect of the present invention, the value of the capacitor C1 is smaller than the value of the energy storage capacitor C.
The invention provides a method for reducing energy consumption of semi-active RFID equipment, which has the advantages that: the invention adopts the principle that the ground induction coil generates induction current at the entering resistor, a person or equipment carrying a label is bound to pass through each time when the RFID reader is started, thereby awakening the reader to work, a circuit connected with the ground induction coil and the storage battery is arranged by utilizing the relation of the working frequency, the weak current generated by the ground induction coil can be greatly gathered by adopting the combined action of the energy storage coil and the energy storage capacitor, and larger electric energy is transferred from the energy storage coil to the energy storage capacitor, and the storage battery is further charged by the charging circuit, therefore, the storage battery does not need to be additionally charged by adding a power supply, the quick cutting of the service life of the storage battery caused by uninterrupted charging when the storage battery is directly connected with alternating current is avoided, the energy consumption can be well reduced by adopting the mode of the inductance coil, and the continuous charging can ensure that the storage battery keeps a process of electric quantity decreasing in the using, the storage battery can be used for a long time until the electric energy can not be effectively supplemented, the mode prolongs the replacement period of the storage battery, so that the storage battery can be consumed as much as possible in the service life, and the waste of resources and energy is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a block diagram of the flow of electrical energy provided by an embodiment of the present invention.
Fig. 2 is a circuit diagram of a coil charging circuit according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Referring to fig. 1, the method for reducing energy consumption of a semi-active RFID device provided in an embodiment of the present invention includes an energy storage circuit, a transmission circuit, and a charging circuit, where the energy storage circuit is provided with a ground sensing coil and an energy storage coil, the energy storage coil is independently arranged on the transmission circuit, the transmission circuit is provided with an energy storage capacitor in parallel with the energy storage coil, the energy storage capacitor is connected to the charging circuit, the energy storage capacitor pressurizes electric energy stored therein and then transmits the electric energy to the charging circuit through the transmission circuit, and charges a storage battery under the action of the charging circuit; the method comprises the following specific steps:
100. the ground induction coil is provided with a resistor or electric equipment passes through the ground induction coil (the ground induction coil can also be connected with current by applying pressure through gravity to generate induction current in a magnetic field mode), the ground induction coil generates induction current when a set gravity object or an object with the resistor (including a person and a vehicle) passes through, the induction current is weak, and the weak current needs to be stored through an energy storage coil;
101. the current generated by the ground induction coil is transmitted to the energy storage coil in a lead, the lead of the ground induction coil and the lead of the energy storage coil are not more than 1 meter, and the ground induction coil and the lead of the energy storage coil are connected with an energy storage capacitor in parallel, and the energy storage capacitor can be broken down only by large current, so that the energy storage capacitor does not act under the condition of generating weak current, and all the weak current is intensively stored in the energy storage coil;
102. the energy storage coil is impacted by a large amount of weak current, the current is gathered into larger current and voltage in the energy storage coil, when the current in the energy storage coil reaches the electric energy capable of puncturing the energy storage capacitor once, the energy storage coil reversely releases the electric energy, the current punctures the energy storage capacitor after the rectification action of the rectifier, so that the electric energy is stored in the energy storage capacitor, the rectifier is equipment for converting alternating current into direct current, a diode is arranged in the rectifier, the energy storage capacitor can be punctured through the energy storage action in the mode, the energy consumption of the higher voltage is reduced in the transmission process, and the situation that the weak current cannot reach a charging circuit independently under the self-loss condition of a lead is avoided;
103. the energy storage capacitor releases electric energy to the charging circuit through the resonant circuit immediately when charging is completed, the charging circuit releases the electric energy to the storage battery capable of receiving the electric energy under the combined action of the resonant circuit and the filter capacitor, the storage battery completes charging without an external power supply, and the storage battery has smaller discharge capacity when being used, so that the charging completion can be suitable for a longer time every time, the ground induction coil also charges the energy storage circuit all the time in the continuous use process of the RFID reader, the electric energy in the charging and energy storage circuit of the storage battery is lost, and the loss does not influence the charging of the storage battery, so that the long-time use is realized.
Preferably, be provided with adjustable resistance among the transmission circuit, when the inductance coil acted on the energy storage coil, the resistance value was zero, the energy storage coil was accomplished under the short circuit condition, consequently can not produce the load, but the energy storage coil energy storage is not continuous again, the electric energy can be released, can cause the circuit temperature too high under the short circuit condition, burn out easily, consequently, when energy storage coil reverse action, the resistance value is the biggest, the maximum resistance value is greater than the transmission circuit resistance value, reduce the flow of electric current on the one hand, on the other hand can reduce the risk that the short circuit caused.
Preferably, the energy storage coil can be a superconducting energy storage coil, the resistance is adjusted flexibly, the resistance has only two values, one value is zero, the other value is peak, partial pilot current of the ground induction coil enters the resistance, the pulse of the resistance is triggered to zero, the subsequent current passes through the resistance and enters the energy storage coil, and after the action is completed, the resistance is reset to the maximum position to wait for the next pulse.
As shown in fig. 2, an inductor L and a battery B are respectively disposed at two ends of the complete circuit, the inductor L is a ground inductor, the LC is an energy storage coil, and a resonant circuit is respectively provided with two capacitors C1 and C2 connected in parallel with an energy storage capacitor, where C1 is in units of microfarads (uF) and C2 is in units of picofarads (pF), in this embodiment, a value of C1 is 1000uF, a value of C2 is 2000pF, a value of the inductor L is 12uH, a 3.6 v battery can be charged, a resonant frequency of the capacitor C2 is 1MHz, a rectifier can be selectively installed between the capacitor C2 and the capacitor C1, and a value of the energy storage capacitor C in this embodiment is greater than 1000 uF.
Preferably, the mode of the resonant circuit can maximize the transmission efficiency of energy, the Schottky diode is rectified and then obtains direct current through the filter capacitor to directly charge the battery, and the charging current is more than 0.6A.
In order to enable the ground induction coil to generate higher current, the winding of the ground induction coil is more than 20 turns, and the ground induction coil adopts a three-dimensional conical winding mode, so that the current generated by the induction coil is increased to the maximum extent, the storage battery is prevented from being charged by an energy storage circuit before the discharge is finished, and the mode has higher transmission efficiency.
Preferably, the storage battery is connected with two circuits, namely a charging circuit and a discharging circuit, a load resistor is arranged in the charging circuit, the storage battery is prevented from being damaged by current generated when the storage battery discharges, and the storage battery cannot discharge to the charging circuit due to the fact that the inductor and the capacitor are arranged in the charging circuit and the rectifier is arranged, so that the storage battery can well play a role in protection.
Preferably, the ground induction coil is installed underground at the identification position of the RFID reader, the energy storage circuit connected with the ground induction coil is arranged on the ground below the RFID reader, the energy storage circuit is connected with a storage battery of the RFID reader through a lead, the energy storage circuit is close to the ground induction coil as far as possible, the loss of electric energy in the lead is reduced, and the energy storage coil and the energy storage capacitor, the energy storage capacitor and the charging circuit can be arranged at longer distances.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (7)
1. The method for reducing energy consumption of the semi-active RFID equipment is characterized in that the active RFID equipment comprises an energy storage circuit, a transmission circuit and a charging circuit, wherein the energy storage circuit is provided with a ground sensing coil and an energy storage coil, the ground sensing coil is arranged underground at the identification position of an RFID reader, the energy storage circuit connected with the ground sensing coil is arranged on the ground below the RFID reader, the energy storage circuit is connected with a storage battery of the RFID reader through a lead, the energy storage coil is independently arranged on the transmission circuit, an energy storage capacitor is arranged in the transmission circuit in parallel with the energy storage coil and is connected into the charging circuit, the energy storage capacitor pressurizes electric energy stored in the energy storage circuit and then transmits the electric energy to the charging circuit through the transmission circuit, and the storage battery is charged under the action of the charging circuit; the method comprises the following specific steps:
the ground induction coil generates a magnetic field through instantaneous movement so as to generate current, the induced current is weak, and the induced current needs to be stored through the energy storage coil;
the ground induction coil generates current which is transmitted to the energy storage coil in the lead, and the energy storage capacitor is connected in parallel with the energy storage coil in the transmission circuit;
the energy storage coil is impacted by a large amount of weak current, the current is gathered into larger current and voltage in the energy storage coil, when the current in the energy storage coil reaches the electric energy capable of puncturing the energy storage capacitor once, the energy storage coil reversely releases the electric energy, the current punctures the energy storage capacitor after the rectification action of the rectifier, so that the electric energy is stored in the energy storage capacitor, and the rectifier is a device for converting alternating current into direct current;
under the condition that charging is completed, the energy storage capacitor immediately releases electric energy to the charging circuit through the resonant circuit, and the charging circuit releases the electric energy to a storage battery capable of receiving the electric energy under the combined action of the resonant circuit and the filter capacitor.
2. The method for reducing energy consumption of a semi-active RFID device as claimed in claim 1, wherein the winding of the ground sensing coil is more than 20 turns, and the ground sensing coil adopts a three-dimensional conical winding manner.
3. The method of claim 2, wherein the transmission circuit has an adjustable resistor, and the resistance value is zero when the inductance coil acts on the energy storage coil, and is maximum when the energy storage coil acts in reverse, and the maximum resistance value is greater than the transmission circuit resistance value.
4. The method of claim 3, wherein a portion of the pilot current of the ground sensing coil enters a resistor, triggering a pulse of the resistor to a zero position, and the resistor is reset to a maximum position after a subsequent current passes through the resistor and enters the energy storage coil.
5. The method for reducing power consumption of semi-active RFID device as claimed in claim 4, wherein the ground coil L and the battery B are respectively disposed at two ends of the complete circuit, and the resonant circuit is respectively disposed with two capacitors C1 and C2 connected in parallel with the energy storage capacitor.
6. The method for reducing power consumption of a semi-active RFID device of claim 5, wherein the value of the capacitor C1 is greater than the value of the capacitor C2.
7. The method for reducing power consumption of a semi-active RFID device of claim 6, wherein the value of the capacitor C1 is less than the value of the energy storage capacitor C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010697140.4A CN111711255B (en) | 2020-07-20 | 2020-07-20 | Method for reducing energy consumption of semi-active RFID equipment |
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| CN202010697140.4A CN111711255B (en) | 2020-07-20 | 2020-07-20 | Method for reducing energy consumption of semi-active RFID equipment |
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| CN111711255A true CN111711255A (en) | 2020-09-25 |
| CN111711255B CN111711255B (en) | 2023-03-28 |
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Cited By (1)
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