CN115496083A - Method, device, storage medium and equipment for reducing power consumption of RFID reader-writer - Google Patents
Method, device, storage medium and equipment for reducing power consumption of RFID reader-writer Download PDFInfo
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- CN115496083A CN115496083A CN202211182037.1A CN202211182037A CN115496083A CN 115496083 A CN115496083 A CN 115496083A CN 202211182037 A CN202211182037 A CN 202211182037A CN 115496083 A CN115496083 A CN 115496083A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10198—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves setting parameters for the interrogator, e.g. programming parameters and operating modes
- G06K7/10207—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves setting parameters for the interrogator, e.g. programming parameters and operating modes parameter settings related to power consumption of the interrogator
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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
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Abstract
When the method, the device, the storage medium and the equipment for reducing the power consumption of the RFID reader-writer are detected, the current battery power can be detected when the RFID reader-writer continuously transmits radio frequency signals to the electronic tags in the preset range by using the current transmitting power, and a target power interval corresponding to the current battery power and a target duty ratio set in the target power interval are selected from a plurality of preset power intervals, so that the continuous transmitting time of the RFID reader-writer when the RFID reader-writer continuously transmits the radio frequency signals can be controlled by the target duty ratio, the continuous transmitting time of the transmitted radio frequency signals can be adjusted by the RFID reader-writer according to the current battery power, the power consumption of the RFID reader-writer is effectively reduced, the battery service time is prolonged, and the user requirements are met.
Description
Technical Field
The present application relates to the field of radio frequency identification technologies, and in particular, to a method, an apparatus, a storage medium, and a device for reducing power consumption of an RFID reader.
Background
The RFID (radio frequency identification) technology is a practical automatic identification technology that performs two-way communication by using radio frequency signals and spatial coupling and transmission characteristics, realizes automatic identification of stationary or moving objects, and performs information exchange. An RFID system using an RFID technology generally includes an RFID reader and a plurality of Electronic tags, and when an Electronic tag enters a communication range of the reader, the RFID reader sends a read command to the Electronic tag to read an Electronic Product Code (EPC) number in the Electronic tag, and obtains information of an item corresponding to the Electronic tag, such as a type and a placement position of the item, according to the EPC number.
At present, when the RFID reader-writer is applied to a handheld device terminal, certain power consumption exists when the RFID reader-writer is communicated with an electronic tag, so that the battery of the handheld terminal device is short in service duration and cannot meet the user requirements.
Disclosure of Invention
The purpose of the present application is to solve at least one of the above technical defects, and in particular, a technical defect that in the prior art, when an RFID reader communicates with an electronic tag, a certain power consumption occurs, so that a battery of a handheld terminal device has a short service life and cannot meet a user's requirement is overcome.
The application provides a method for reducing power consumption of an RFID reader-writer, which is applied to handheld terminal equipment and comprises the following steps:
when the RFID reader-writer is detected to continuously transmit radio frequency signals to the electronic tags within a preset range at the current transmission power, the current battery electric quantity is detected;
selecting a target electric quantity interval corresponding to the current battery electric quantity and a target duty ratio set in the target electric quantity interval from a plurality of preset electric quantity intervals; wherein the current battery charge is positively correlated with the target duty cycle;
and controlling the continuous transmission duration of the RFID reader-writer when the radio frequency signal is continuously transmitted according to the target duty ratio, and returning to execute the step of detecting the current battery electric quantity according to a preset detection frequency during the period that the RFID reader-writer continuously transmits the radio frequency signal until the RFID reader-writer stops transmitting the radio frequency signal or the current battery electric quantity reaches the shutdown electric quantity.
Optionally, a target RSSI threshold is further set in the target power interval, and the method further includes:
in the current statistical period, receiving a response signal and a corresponding RSSI value which are returned when at least one electronic tag responds to the radio frequency signal;
determining the maximum RSSI value and the average RSSI value in the current statistical period according to the RSSI value of the response signal returned by each electronic tag;
when the RSSI maximum value is less than the target RSSI threshold value, reducing the current transmission power;
when the RSSI average value is larger than the target RSSI threshold value, the current transmission power is increased, and the increased current transmission power is not larger than a preset transmission power threshold value;
and when the next statistical period comes, taking the next statistical period as the current statistical period, and then returning to the step of receiving a response signal returned when at least one electronic tag responds to the radio-frequency signal and a corresponding RSSI (received signal strength indicator) value in the current statistical period until the RFID reader stops transmitting the radio-frequency signal or the current battery power reaches the power-off power.
Optionally, the controlling, according to the target duty cycle, a continuous transmission duration when the RFID reader continuously transmits the radio frequency signal includes:
determining a current detection period and a target emission duration corresponding to the target duty ratio;
judging whether the continuous emission time of the RFID reader-writer for continuously emitting the radio frequency signals reaches the target emission time in the current detection period;
if so, interrupting the RFID reader-writer to transmit the radio frequency signal;
and when the next detection period comes, taking the next detection period as the current detection period, returning to the step of judging whether the continuous emission time of the radio frequency signal continuously emitted by the RFID reader-writer reaches the target emission time in the current detection period until the RFID reader-writer stops emitting the radio frequency signal or the current battery electric quantity reaches the shutdown electric quantity.
Optionally, the setting process of the duty ratio and the RSSI threshold value in each power interval and each power interval includes:
dividing the battery electric quantity when the battery is fully charged into a plurality of gradient-shaped electric quantity intervals according to a preset electric quantity division rule; wherein, the corresponding gradient of each electric quantity interval is positively correlated with the percentage of the electric quantity of the battery when the electric quantity of the battery in the electric quantity interval occupies full charge;
for each electric quantity interval:
setting a duty ratio and an RSSI threshold value under the electric quantity interval according to the gradient of the electric quantity interval; wherein, the gradient of the electric quantity interval is in positive correlation with the duty ratio and the RSSI threshold value under the electric quantity interval.
The application also provides a device for reducing the power consumption of an RFID reader-writer, comprising:
the electric quantity detection module is used for detecting the current electric quantity of the battery when the RFID reader-writer is detected to continuously transmit radio frequency signals to the electronic tags in the preset range by the current transmission power;
the duty ratio determining module is used for selecting a target electric quantity interval corresponding to the current battery electric quantity and a target duty ratio set in the target electric quantity interval from a plurality of preset electric quantity intervals; wherein the current battery level is positively correlated with the target duty cycle;
and the transmission duration control module is used for controlling the continuous transmission duration when the RFID reader-writer continuously transmits the radio-frequency signals according to the target duty ratio, and returning to execute the step of detecting the current battery electric quantity according to a preset detection frequency during the period when the RFID reader-writer continuously transmits the radio-frequency signals until the RFID reader-writer stops transmitting the radio-frequency signals or the current battery electric quantity reaches the shutdown electric quantity.
Optionally, a target RSSI threshold is further set in the target power interval, and the apparatus further includes:
the signal receiving module is used for receiving a response signal and a corresponding RSSI value which are returned when at least one electronic tag responds to the radio frequency signal in the current statistical period;
the strength value counting module is used for determining the maximum RSSI value and the average RSSI value in the current counting period according to the RSSI value of the response signal returned by each electronic tag;
a first adjustment module configured to decrease the current transmit power when the maximum RSSI value is less than the target RSSI threshold;
a second adjusting module, configured to increase the current transmit power when the RSSI average value is greater than the target RSSI threshold, where the increased current transmit power is not greater than a preset transmit power threshold;
and the statistical period replacing module is used for returning to execute the step of receiving a response signal and a corresponding RSSI value returned by at least one electronic tag when responding to the radio frequency signal in the current statistical period after the next statistical period is taken as the current statistical period when the next statistical period comes until the RFID reader stops transmitting the radio frequency signal or the current battery power reaches the power-off power.
Optionally, the transmission duration control module includes:
the parameter determining module is used for determining a current detection period and a target emission duration corresponding to the target duty ratio;
the time length judging module is used for judging whether the continuous transmitting time length for the RFID reader-writer to continuously transmit the radio frequency signal reaches the target transmitting time length or not in the current detection period;
the signal interruption module is used for interrupting the RFID reader to transmit the radio frequency signal if the radio frequency signal reaches the preset frequency;
and the detection period replacing module is used for returning to execute the step of judging whether the continuous transmission time length for continuously transmitting the radio frequency signal by the RFID reader-writer reaches the target transmission time length or not in the current detection period after the next detection period is taken as the current detection period when the next detection period comes until the RFID reader-writer stops transmitting the radio frequency signal or the current battery electric quantity reaches the shutdown electric quantity.
Optionally, the apparatus further comprises:
the interval division module is used for dividing the battery electric quantity when the battery is fully charged into a plurality of gradient-shaped electric quantity intervals according to a preset electric quantity division rule; wherein, the corresponding gradient of each electric quantity interval is positively correlated with the percentage of the electric quantity of the battery when the electric quantity of the battery in the electric quantity interval occupies full charge;
a parameter setting module for, for each electric quantity interval: setting a duty ratio and an RSSI threshold value under the electric quantity interval according to the gradient of the electric quantity interval; and the gradient of the electric quantity interval is in positive correlation with the duty ratio and the RSSI threshold value under the electric quantity interval.
The present application further provides a storage medium having stored therein computer-readable instructions, which, when executed by one or more processors, cause the one or more processors to perform the steps of the method of reducing power consumption of an RFID reader as described in any of the above embodiments.
The application also provides a handheld terminal device, including: one or more processors, and a memory;
the memory stores computer readable instructions which, when executed by the one or more processors, perform the steps of the method for reducing power consumption of an RFID reader as described in any one of the above embodiments.
According to the technical scheme, the embodiment of the application has the following advantages:
according to the method, the device, the storage medium and the equipment for reducing the power consumption of the RFID reader-writer, when the RFID reader-writer is detected to continuously transmit the radio frequency signals to the electronic tags in the preset range at the current transmission power, the current battery power can be detected, and the target power interval corresponding to the current battery power and the target duty ratio set in the target power interval are selected from the preset multiple power intervals, so that the continuous transmission time of the RFID reader-writer when the RFID reader-writer continuously transmits the radio frequency signals can be controlled through the target duty ratio, and the continuous transmission time of the RFID reader-writer when the RFID reader-writer continuously transmits the radio frequency signals can be adjusted according to the current battery power; for example, when the current battery electric quantity is higher, the target duty ratio is larger, the continuous transmission time of the RFID reader-writer is longer, and when the current battery electric quantity is lower, the target duty ratio is smaller, the continuous transmission time of the RFID reader-writer is shorter, so that the power consumption of the RFID reader-writer is effectively reduced, the battery service time is prolonged, and the user requirements are met.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic flowchart of a method for reducing power consumption of an RFID reader according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an apparatus for reducing power consumption of an RFID reader provided in an embodiment of the present application;
fig. 3 is a schematic internal structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
At present, when the RFID reader-writer is applied to a handheld device terminal, certain power consumption exists when the RFID reader-writer is communicated with an electronic tag, so that the battery of the handheld terminal device is short in service duration and cannot meet the user requirements. Based on this, the following technical solutions are proposed in the present application, specifically see the following:
in an embodiment, as shown in fig. 1, fig. 1 is a schematic flowchart of a method for reducing power consumption of an RFID reader according to an embodiment of the present application; the application provides a method for reducing power consumption of an RFID reader-writer, which is applied to handheld terminal equipment, and the method can comprise the following steps:
s110: and when the RFID reader-writer is detected to continuously transmit the radio frequency signal to the electronic tag in the preset range at the current transmission power, detecting the current battery electric quantity.
In this step, when the handheld terminal device detects that the RFID reader continuously transmits the radio frequency signal to the electronic tag within the preset range at the current transmission power, the current battery power can be detected, and the continuous transmission duration when the RFID reader transmits the radio frequency signal is adjusted according to the current battery power, so as to be different from the prior art that the RFID reader continuously transmits the radio frequency signal to the electronic tag during the continuous inventory period, thereby effectively reducing the power consumption of the RFID reader.
The RFID reader-writer can work at different frequency points in different frequency ranges, and when the RFID reader-writer works at different frequencies, the applicable scenes of the RFID reader-writer are different; when the RFID reader-writer works at different frequency points, the distances of the labels which can be read by the RFID reader-writer are different.
For example, RFID readers can be classified into readers of 125K, 13.56M, 900M, 2.4G, and other frequency bands according to frequency. The reader-writer with the voltage of 125K is generally called LF and is used for animal husbandry management; the 13.56M reader-writer is generally called HF, and is used for personnel management such as driving and checking attendance and the like, and also can be used for asset anti-counterfeiting management; the reader-writer of 900M is generally called UHF, the communication distance is far, the anti-collision performance is good, and the reader-writer is generally used in parking lots and logistics; the 2.4G reader-writer microwave band RFID card reader has strong penetrability and is the first choice of automatic intelligent equipment; the 5.8G is generally a microwave band RFID card reader, which is commonly used in highway ETC electronic toll collection systems.
When the RFID reader is applied to the handheld terminal equipment, bar code scanning can be replaced in a production link, and automatic data acquisition is realized; the material pulling link is matched with the AGV trolley for transportation; and the warehouse link manages the goods entering and exiting, checking and the like.
Further, the electronic tag in the present application may be a Passive tag (Passive tags) or an Active tag (Active tags). The passive tag provides working energy for the passive tag through a command and a carrier wave sent by the RFID reader-writer; the active tag is internally provided with an energy source, and an RFID reader-writer is not required to provide working energy for the active tag.
The inventory in this application refers to a process of identifying the electronic tag by the RFID reader. The RFID reader transmits a Query command in one of the four calls, and starts an inventory cycle, wherein in the inventory cycle, the RFID reader can identify and read at least one electronic tag participating in inventory within a set identification range for multiple times, and one or more tags can respond. When the RFID reader-writer checks that a certain electronic tag responds, the electronic tag can be requested to send out PC, EPC and CRC-16. When the electronic tags are acquired to send out PC, EPC and CRC-16, the RFID reader-writer can transact with the electronic tags, and the transaction process comprises reading or writing the electronic tags.
It can be understood that the preset range refers to an identification range corresponding to a magnetic field range of the RFID reader, and the preset range may be modified according to an actual application scenario, a working frequency point of the RFID reader, and the like, which is not limited herein.
S120: and selecting a target electric quantity interval corresponding to the current battery electric quantity and a target duty ratio set in the target electric quantity interval from a plurality of preset electric quantity intervals.
In this embodiment, when the current battery power is obtained through S120, the target power interval and the target duty cycle set in the target power interval may be determined according to the current battery power, so that the continuous transmission duration when the RFID reader continuously transmits the radio frequency signal may be adjusted according to the target duty cycle.
The target electric quantity interval refers to an electric quantity interval where the current battery electric quantity is located, and it can be understood that a plurality of electric quantity intervals are configured in advance before the current battery electric quantity is detected, corresponding duty ratios, RSSI threshold values and the like are set for each electric quantity interval, after the current battery electric quantity is obtained, the corresponding electric quantity interval is determined according to the current battery electric quantity, the electric quantity interval serves as the target electric quantity interval, and the duty ratios set in the electric quantity interval serve as the target duty ratios.
Further, the duty ratio of the present application refers to a ratio of a duration of continuous transmission of the radio frequency signal to a total duration in the detection period, and a positive correlation is formed between the current battery capacity of the present application and the duty ratio. For example, when the current battery power > =50%, the corresponding duty ratio may also be 100%, and when the current battery power > =20% and <50%, the corresponding duty ratio may also be 80%, and when the current battery power <20%, the corresponding duty ratio may also be 50%, so that when the current battery power is low, the continuous transmission duration of the RFID reader-writer may be reduced, thereby effectively reducing the power consumption of the RFID reader-writer.
S130: and controlling the continuous transmission time length when the RFID reader-writer continuously transmits the radio frequency signals according to the target duty ratio, and returning to execute S110-S130 according to a preset detection frequency during the period when the RFID reader-writer continuously transmits the radio frequency signals until the RFID reader-writer stops transmitting the radio frequency signals or the current battery power reaches the shutdown power.
In this step, after the target electric quantity interval corresponding to the current battery electric quantity and the target duty ratio set in the target electric quantity interval are determined through S120, the application can control the continuous transmission duration when the RFID reader continuously transmits the radio frequency signal according to the target duty ratio, so as to reduce the power consumption of the RFID reader.
Furthermore, after the RFID reader works for a period of time, the current battery power level may change to some extent, so that the present application may further detect the current battery power level according to a preset detection frequency during the period that the RFID reader continuously transmits the radio frequency signal, and re-determine a target power level interval corresponding to the current battery power level and a target duty ratio set in the target power level interval, thereby controlling a continuous transmission duration when the RFID reader continuously transmits the radio frequency signal according to the newly determined target duty ratio, so as to control the continuous transmission duration of the RFID reader at different battery power levels and with different duty ratios, so as to further reduce the power consumption of the RFID reader and prolong the battery service time.
When the handheld terminal device detects that the RFID reader-writer stops transmitting radio frequency signals or the current battery power reaches the shutdown power, the handheld terminal device stops detecting the current battery power so as to prolong the service time of the battery.
In the above embodiment, when it is detected that the RFID reader continuously transmits the radio frequency signal to the electronic tag within the preset range with the current transmission power, the current battery power may be detected, and a target power interval corresponding to the current battery power and a target duty ratio set in the target power interval are selected from a plurality of power intervals set in advance, so that the continuous transmission time length when the RFID reader continuously transmits the radio frequency signal may be controlled by the target duty ratio, so that the RFID reader may adjust the continuous transmission time length for transmitting the radio frequency signal according to the current battery power; for example, when the current battery electric quantity is higher, the target duty ratio is larger, the continuous transmission time of the RFID reader-writer is longer, and when the current battery electric quantity is lower, the target duty ratio is smaller, the continuous transmission time of the RFID reader-writer is shorter, so that the power consumption of the RFID reader-writer is effectively reduced, the battery service time is prolonged, and the user requirements are met.
In an embodiment, a target RSSI threshold is further set in the target power interval, and the method may further include:
s140: and in the current statistical period, receiving a response signal returned when at least one electronic tag responds to the radio frequency signal and a corresponding RSSI value.
S150: and determining the maximum RSSI value and the average RSSI value in the current statistical period according to the RSSI value of the response signal returned by each electronic tag.
S160: and when the maximum RSSI value is smaller than the target RSSI threshold value, reducing the current transmission power.
S170: and when the RSSI average value is larger than the target RSSI threshold value, the current transmission power is increased, and the increased current transmission power is not larger than a preset transmission power threshold value.
S180: and when the next counting period comes, taking the next counting period as the current counting period, and returning to the step of S140-S180 until the RFID reader stops transmitting the radio frequency signal or the current battery power reaches the power-off power.
In this embodiment, before the current battery power is detected, a plurality of power intervals are configured in advance, a corresponding duty ratio, an RSSI threshold value and the like are set for each power interval, after the current battery power is obtained, the corresponding power interval is determined according to the current battery power, the power interval is used as a target power interval, the duty ratio set in the power interval is used as a target duty ratio, and the RSSI threshold set in the power interval is used as a target RSSI threshold value.
Then, in the current statistical period, the response signal returned when at least one electronic tag responds to the radio frequency signal and the corresponding RSSI value can be received, and the RSSI maximum value and the RSSI average value in the current statistical period can be calculated according to the RSSI value of the response signal returned by each electronic tag. The RSSI value is normally a negative value, so the absolute value of the RSSI value is used when the maximum RSSI value and the average RSSI value are calculated.
Further, after the maximum RSSI value and the average RSSI value in the current statistical period are obtained, the maximum RSSI value and the average RSSI value can be compared with the target RSSI threshold value respectively, when the maximum RSSI value is smaller than the target RSSI threshold value, it is indicated that the current signal quality is better, the current transmission power can be reduced, the specific reduced value can be determined according to the actual situation, for example, the current transmission power can be reduced by 1dBm or 2dBm, and the like, as long as the RFID reader transmits the radio frequency signal by using the reduced transmission power, the electronic tag in the preset range can be identified, and the limitation is not made herein; when the RSSI average value is greater than the target RSSI threshold, it indicates that the current signal quality is poor, and the current transmission power may be increased, for example, by 1dBm or 2dBm, as long as the increased current transmission power is not greater than the preset transmission power threshold, which may be set according to an empirical value, without limitation.
It can be understood that, since the RSSI value fluctuates all the time and is easily interfered by the outside, the RSSI value at a certain instant may be very low, and the RSSI value at the next instant may be very high, in order to improve the determination accuracy, the RSSI average value in the current statistical period may be calculated after the RSSI value of the response signal returned by each electronic tag in the current statistical period is obtained, and the current signal quality is determined by using the RSSI average value.
Furthermore, the method and the device can further take the next statistical period as the current statistical period when the current statistical period is ended and enters the next statistical period, continue to receive the response signals returned when at least one electronic tag responds to the radio frequency signals and the corresponding RSSI values, determine the maximum RSSI value and the average RSSI value of the RSSI in the current statistical period according to the RSSI value of the response signals returned by each electronic tag, compare the maximum RSSI value and the average RSSI value with the target RSSI threshold value respectively, and dynamically adjust the current transmitting power according to the comparison result, so that the power consumption of the RFID reader-writer is further reduced, and the service time of the battery is prolonged.
In one embodiment, the step S130 of controlling a continuous transmission duration when the RFID reader continuously transmits the radio frequency signal according to the target duty cycle may include:
s131: and determining the current detection period and the target emission duration corresponding to the target duty ratio.
S132: and judging whether the continuous transmission time length for continuously transmitting the radio frequency signal by the RFID reader-writer reaches the target transmission time length or not in the current detection period.
S133: and if so, interrupting the RFID reader-writer to transmit the radio frequency signal.
S134: and if not, continuously monitoring the continuous emission time of the RFID reader-writer.
S135: and when the next detection period comes, after the next detection period is taken as the current detection period, returning to the step of judging whether the continuous transmission time length for continuously transmitting the radio frequency signal by the RFID reader-writer reaches the target transmission time length or not in the current detection period until the RFID reader-writer stops transmitting the radio frequency signal or the current battery electric quantity reaches the shutdown electric quantity.
In this embodiment, when controlling the continuous transmission duration of the RFID reader according to the target duty ratio, a current detection period and a target transmission duration corresponding to the target duty ratio may be determined first, where the current detection period refers to a period set when a ratio of a duration of continuous transmission of the detected radio frequency signal to a total duration is set, and the target transmission duration refers to a transmission duration when the continuous transmission duration of the RFID reader reaches the target duty ratio in the current detection period.
After the current detection period and the target transmission time length corresponding to the target duty ratio are determined, the continuous transmission time length of the RFID reader-writer can be continuously monitored in the current detection period, whether the continuous transmission time length of the RFID reader-writer reaches the target transmission time length or not is judged, and if the continuous transmission time length of the RFID reader-writer reaches the target transmission time length, the RFID reader-writer is immediately interrupted to transmit radio frequency signals, so that the continuous transmission time length of the RFID reader-writer is reduced, and the power consumption of the RFID reader-writer is effectively reduced; if not, the continuous transmission time length of the RFID reader-writer can be continuously monitored until the continuous transmission time length reaches the target transmission time length.
In addition, if the current detection period is finished and the next detection period is entered, the method and the device can take the next detection period as the current detection period, and continuously judge whether the continuous transmission time of the RFID reader-writer for continuously transmitting the radio frequency signals reaches the target transmission time in the current detection period until the RFID reader-writer stops transmitting the radio frequency signals or the current battery electric quantity reaches the shutdown electric quantity, so that the power consumption of the RFID reader-writer is reduced.
In one embodiment, the setting process of the duty ratio and the RSSI threshold value in each power interval may include:
s101: dividing the battery electric quantity when the battery is fully charged into a plurality of gradient electric quantity intervals according to a preset electric quantity division rule; wherein, the corresponding gradient of each electric quantity interval is positively correlated with the percentage of the electric quantity of the battery when the electric quantity of the battery in the electric quantity interval occupies full charge.
S102: for each electric quantity interval: setting a duty ratio and an RSSI threshold value under the electric quantity interval according to the gradient of the electric quantity interval; wherein, the gradient of the electric quantity interval is in positive correlation with the duty ratio and the RSSI threshold value under the electric quantity interval.
In this embodiment, before detecting the current battery power, a plurality of power intervals may be preconfigured in the present application, and a corresponding duty cycle, an RSSI threshold, and the like are set for each power interval. When the electric quantity intervals are configured, the battery electric quantity during full charge can be divided into a plurality of gradient-shaped electric quantity intervals according to a preset electric quantity division rule, and the gradient corresponding to each electric quantity interval is positively correlated with the percentage of the battery electric quantity during the full charge occupied by the battery electric quantity in the electric quantity interval.
For example, when the battery charge level at the time of full charge is 100%, the present application may divide the battery charge level into a plurality of gradient-shaped charge level intervals, for example > =50% of the charge level interval at the highest gradient, > =20% of the charge level interval at the middle gradient and <50% of the charge level interval at the lowest gradient, and <20% of the charge level interval at the lowest gradient.
After the electric quantity interval is divided, the duty ratio and the RSSI threshold value in the electric quantity interval can be set according to the gradient of the electric quantity interval; wherein, the gradient of the electric quantity interval is in positive correlation with the duty ratio and the RSSI threshold value under the electric quantity interval. For example, when the power interval is > =50%, it is the power interval under the highest gradient, the corresponding duty ratio may be 100%, and the RSSI threshold may be 50dBm; when the power interval is > =20% and <50%, it is the power interval under the intermediate gradient, the corresponding duty ratio may be 80%, and the RSSI threshold may be 40dBm; when the power interval is <20%, it is the power interval at the lowest gradient, the corresponding duty cycle may be 50%, and the RSSI threshold may be 30dBm. The specific numerical values may be set according to actual situations, and are not limited herein.
The following describes the device for reducing the power consumption of the RFID reader provided in the embodiment of the present application, and the device for reducing the power consumption of the RFID reader described below and the method for reducing the power consumption of the RFID reader described above may be referred to correspondingly.
In an embodiment, as shown in fig. 2, fig. 2 is a schematic structural diagram of an apparatus for reducing power consumption of an RFID reader provided in an embodiment of the present application; the present application further provides a device for reducing power consumption of an RFID reader, which may include an electric quantity detection module 210, a duty ratio determination module 220, and a transmission duration control module 230, and specifically includes the following steps:
the power detection module 210 is configured to detect a current battery power when detecting that the RFID reader continuously transmits a radio frequency signal to the electronic tag within a preset range at the current transmission power.
A duty ratio determining module 220, configured to select, from a plurality of preset electric quantity intervals, a target electric quantity interval corresponding to the current battery electric quantity and a target duty ratio set in the target electric quantity interval; wherein the current battery level is positively correlated with the target duty cycle.
And a transmission duration control module 230, configured to control, according to the target duty cycle, a continuous transmission duration when the RFID reader continuously transmits the radio frequency signal, and return to execute the step of detecting the current battery power according to a preset detection frequency during the period when the RFID reader continuously transmits the radio frequency signal until the RFID reader stops transmitting the radio frequency signal or the current battery power reaches a shutdown power.
In the above embodiment, when it is detected that the RFID reader continuously transmits the radio frequency signal to the electronic tag within the preset range at the current transmission power, the current battery power may be detected, and a target power interval corresponding to the current battery power and a target duty cycle set in the target power interval are selected from a plurality of preset power intervals, so that the continuous transmission time when the RFID reader continuously transmits the radio frequency signal may be controlled by the target duty cycle, so that the RFID reader may adjust the continuous transmission time for transmitting the radio frequency signal according to the current battery power; for example, when the current battery electric quantity is higher, the target duty ratio is larger, the continuous transmission time of the RFID reader-writer is longer, and when the current battery electric quantity is lower, the target duty ratio is smaller, the continuous transmission time of the RFID reader-writer is shorter, so that the power consumption of the RFID reader-writer is effectively reduced, the battery service time is prolonged, and the user requirements are met.
In one embodiment, a target RSSI threshold is further set in the target power interval, and the apparatus further includes:
the signal receiving module is used for receiving a response signal returned when at least one electronic tag responds to the radio frequency signal and a corresponding RSSI value in the current statistical period;
the strength value statistical module is used for determining the maximum RSSI value and the average RSSI value in the current statistical period according to the RSSI value of the response signal returned by each electronic tag;
a first adjustment module configured to decrease the current transmit power when the maximum RSSI value is less than the target RSSI threshold;
a second adjusting module, configured to increase the current transmission power when the RSSI average value is greater than the target RSSI threshold, where the increased current transmission power is not greater than a preset transmission power threshold;
and the statistical period replacing module is used for returning to execute the step of receiving a response signal and a corresponding RSSI value returned by at least one electronic tag when responding to the radio frequency signal in the current statistical period after the next statistical period is taken as the current statistical period when the next statistical period comes until the RFID reader stops transmitting the radio frequency signal or the current battery power reaches the power-off power.
In one embodiment, the transmission duration control module 230 includes:
the parameter determining module is used for determining a current detection period and a target emission duration corresponding to the target duty ratio;
the time length judging module is used for judging whether the continuous transmitting time length for the RFID reader-writer to continuously transmit the radio frequency signal reaches the target transmitting time length or not in the current detection period;
the signal interruption module is used for interrupting the RFID reader-writer to transmit the radio frequency signal if the radio frequency signal is up;
and the continuous detection module is used for continuously monitoring the continuous transmission time length of the RFID reader-writer if the continuous transmission time length does not reach the preset value.
And the detection period replacing module is used for returning to execute the step of judging whether the continuous transmission time length for continuously transmitting the radio frequency signals by the RFID reader-writer reaches the target transmission time length or not in the current detection period after the next detection period is taken as the current detection period when the next detection period comes until the RFID reader-writer stops transmitting the radio frequency signals or the current battery electric quantity reaches the shutdown electric quantity.
In one embodiment, the apparatus further comprises:
the interval division module is used for dividing the battery electric quantity when the battery is fully charged into a plurality of gradient electric quantity intervals according to a preset electric quantity division rule; wherein, the corresponding gradient of each electric quantity interval is positively correlated with the percentage of the electric quantity of the battery when the electric quantity of the battery in the electric quantity interval occupies full charge;
a parameter setting module, configured to, for each electric quantity interval: setting a duty ratio and an RSSI threshold value under the electric quantity interval according to the gradient of the electric quantity interval; and the gradient of the electric quantity interval is in positive correlation with the duty ratio and the RSSI threshold value under the electric quantity interval.
In one embodiment, the present application further provides a storage medium having stored therein computer-readable instructions, which, when executed by one or more processors, cause the one or more processors to perform the steps of the method for reducing power consumption of an RFID reader as described in any one of the above embodiments.
In one embodiment, the present application further provides a handheld terminal device, including: one or more processors, and a memory.
The memory has stored therein computer readable instructions which, when executed by the one or more processors, perform the steps of the method of reducing power consumption of an RFID reader as described in any one of the above embodiments.
Schematically, as shown in fig. 3, fig. 3 is a schematic diagram of an internal structure of a computer device provided in the embodiment of the present application, and the computer device 300 may be provided as a handheld terminal device. Referring to fig. 3, a computer device 300 includes a processing component 302 that further includes one or more processors and memory resources, represented by memory 301, for storing instructions, such as application programs, that are executable by the processing component 302. The application programs stored in memory 301 may include one or more modules that each correspond to a set of instructions. Further, the processing component 302 is configured to execute the instructions to perform the method of reducing power consumption of an RFID reader of any of the embodiments described above.
The computer device 300 may also include a power component 303 configured to perform power management of the computer device 300, a wired or wireless network interface 304 configured to connect the computer device 300 to a network, and an input output (I/O) interface 305. The computer device 300 may operate based on an operating system stored in memory 301, such as Windows Server, mac OS XTM, unix, linux, free BSDTM, or the like.
Those skilled in the art will appreciate that the architecture shown in fig. 3 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, the embodiments may be combined as needed, and the same and similar parts may be referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for reducing power consumption of an RFID reader-writer is applied to handheld terminal equipment, and is characterized by comprising the following steps:
when the RFID reader-writer is detected to continuously transmit radio frequency signals to the electronic tags within a preset range at the current transmission power, the current battery electric quantity is detected;
selecting a target electric quantity interval corresponding to the current battery electric quantity and a target duty ratio set in the target electric quantity interval from a plurality of preset electric quantity intervals; wherein the current battery level is positively correlated with the target duty cycle;
and controlling the continuous transmission duration of the RFID reader-writer when the radio frequency signal is continuously transmitted according to the target duty ratio, and returning to execute the step of detecting the current battery electric quantity according to a preset detection frequency during the period that the RFID reader-writer continuously transmits the radio frequency signal until the RFID reader-writer stops transmitting the radio frequency signal or the current battery electric quantity reaches the shutdown electric quantity.
2. The method for reducing power consumption of an RFID reader/writer according to claim 1, wherein a target RSSI threshold is further set in the target power interval, and the method further comprises:
in the current statistical period, receiving a response signal returned when at least one electronic tag responds to the radio frequency signal and a corresponding RSSI value;
determining the maximum RSSI value and the average RSSI value in the current statistical period according to the RSSI value of the response signal returned by each electronic tag;
when the maximum RSSI is smaller than the target RSSI threshold value, reducing the current transmission power;
when the RSSI average value is larger than the target RSSI threshold value, the current transmission power is increased, and the increased current transmission power is not larger than a preset transmission power threshold value;
and when the next counting period comes, taking the next counting period as the current counting period, and then returning to the step of receiving a response signal returned by at least one electronic tag responding to the radio frequency signal and a corresponding RSSI value in the current counting period until the RFID reader stops transmitting the radio frequency signal or the current battery power reaches the power-off power.
3. The method according to claim 1, wherein the controlling the continuous transmission duration when the RFID reader continuously transmits the radio frequency signal according to the target duty cycle comprises:
determining a current detection period and a target emission duration corresponding to the target duty ratio;
judging whether the continuous transmission time length for continuously transmitting the radio frequency signal by the RFID reader-writer reaches the target transmission time length or not in the current detection period;
if so, interrupting the RFID reader-writer to transmit the radio frequency signal;
if not, continuously monitoring the continuous transmitting time of the RFID reader-writer;
and when the next detection period comes, taking the next detection period as the current detection period, returning to the step of judging whether the continuous emission time of the radio frequency signal continuously emitted by the RFID reader-writer reaches the target emission time in the current detection period until the RFID reader-writer stops emitting the radio frequency signal or the current battery electric quantity reaches the shutdown electric quantity.
4. The method for reducing the power consumption of the RFID reader/writer according to claim 2, wherein the setting process of the duty cycle and the RSSI threshold value in each power interval and each power interval comprises:
dividing the battery electric quantity when the battery is fully charged into a plurality of gradient electric quantity intervals according to a preset electric quantity division rule; wherein, the corresponding gradient of each electric quantity interval is positively correlated with the percentage of the electric quantity of the battery when the electric quantity of the battery in the electric quantity interval occupies full charge;
for each electric quantity interval:
setting a duty ratio and an RSSI threshold value under the electric quantity interval according to the gradient of the electric quantity interval; wherein, the gradient of the electric quantity interval is in positive correlation with the duty ratio and the RSSI threshold value under the electric quantity interval.
5. An apparatus for reducing power consumption of an RFID reader, comprising:
the electric quantity detection module is used for detecting the current electric quantity of the battery when the RFID reader-writer is detected to continuously transmit radio frequency signals to the electronic tags in the preset range by the current transmission power;
the duty ratio determining module is used for selecting a target electric quantity interval corresponding to the current battery electric quantity and a target duty ratio set in the target electric quantity interval from a plurality of preset electric quantity intervals; wherein the current battery level is positively correlated with the target duty cycle;
and the transmission duration control module is used for controlling the continuous transmission duration when the RFID reader-writer continuously transmits the radio-frequency signal according to the target duty ratio, and returning to execute the step of detecting the current battery electric quantity according to a preset detection frequency during the period that the RFID reader-writer continuously transmits the radio-frequency signal until the RFID reader-writer stops transmitting the radio-frequency signal or the current battery electric quantity reaches the shutdown electric quantity.
6. The apparatus of claim 5, wherein a target RSSI threshold is further set in the target power interval, the apparatus further comprising:
the signal receiving module is used for receiving a response signal returned when at least one electronic tag responds to the radio frequency signal and a corresponding RSSI value in the current statistical period;
the strength value statistical module is used for determining the maximum RSSI value and the average RSSI value in the current statistical period according to the RSSI value of the response signal returned by each electronic tag;
a first adjustment module configured to decrease the current transmit power when the maximum RSSI value is less than the target RSSI threshold;
a second adjusting module, configured to increase the current transmission power when the RSSI average value is greater than the target RSSI threshold, where the increased current transmission power is not greater than a preset transmission power threshold;
and the statistical period replacing module is used for returning to execute the step of receiving a response signal returned by at least one electronic tag when responding to the radio-frequency signal and a corresponding RSSI (received signal strength indicator) value in the current statistical period after the next statistical period is taken as the current statistical period when the next statistical period comes until the RFID reader stops transmitting the radio-frequency signal or the current battery power reaches the shutdown power.
7. The apparatus of claim 5, wherein the transmission duration control module comprises:
the parameter determining module is used for determining a current detection period and a target emission duration corresponding to the target duty ratio;
the time length judging module is used for judging whether the continuous transmitting time length for the RFID reader-writer to continuously transmit the radio frequency signal reaches the target transmitting time length or not in the current detection period;
the signal interruption module is used for interrupting the RFID reader-writer to transmit the radio frequency signal if the radio frequency signal is up;
the continuous detection module is used for continuously monitoring the continuous emission duration of the RFID reader-writer if the continuous emission duration does not reach the preset value;
and the detection period replacing module is used for returning to execute the step of judging whether the continuous transmission time length for continuously transmitting the radio frequency signal by the RFID reader-writer reaches the target transmission time length or not in the current detection period after the next detection period is taken as the current detection period when the next detection period comes until the RFID reader-writer stops transmitting the radio frequency signal or the current battery electric quantity reaches the shutdown electric quantity.
8. The apparatus of claim 6, wherein the apparatus further comprises:
the interval division module is used for dividing the battery electric quantity when the battery is fully charged into a plurality of gradient-shaped electric quantity intervals according to a preset electric quantity division rule; wherein, the corresponding gradient of each electric quantity interval is in positive correlation with the percentage of the electric quantity of the battery when the electric quantity of the battery in the electric quantity interval occupies full charge;
a parameter setting module, configured to, for each electric quantity interval: setting a duty ratio and an RSSI threshold value under the electric quantity interval according to the gradient of the electric quantity interval; wherein, the gradient of the electric quantity interval is in positive correlation with the duty ratio and the RSSI threshold value under the electric quantity interval.
9. A storage medium, characterized by: the storage medium has stored therein computer readable instructions, which, when executed by one or more processors, cause the one or more processors to perform the steps of the method of reducing power consumption of an RFID reader according to any one of claims 1 to 4.
10. A hand-held terminal device, comprising: one or more processors, and a memory;
the memory has stored therein computer readable instructions which, when executed by the one or more processors, perform the steps of the method of reducing power consumption of an RFID reader as claimed in any one of claims 1 to 4.
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| CN202211182037.1A CN115496083A (en) | 2022-09-27 | 2022-09-27 | Method, device, storage medium and equipment for reducing power consumption of RFID reader-writer |
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| CN202211182037.1A CN115496083A (en) | 2022-09-27 | 2022-09-27 | Method, device, storage medium and equipment for reducing power consumption of RFID reader-writer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116992910A (en) * | 2023-09-27 | 2023-11-03 | 深圳市国芯物联科技有限公司 | RFID reader-writer capable of dynamic power control |
| CN116992895A (en) * | 2023-09-26 | 2023-11-03 | 深圳市国芯物联科技有限公司 | RFID power self-adaptive control method |
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2022
- 2022-09-27 CN CN202211182037.1A patent/CN115496083A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116992895A (en) * | 2023-09-26 | 2023-11-03 | 深圳市国芯物联科技有限公司 | RFID power self-adaptive control method |
| CN116992910A (en) * | 2023-09-27 | 2023-11-03 | 深圳市国芯物联科技有限公司 | RFID reader-writer capable of dynamic power control |
| CN116992910B (en) * | 2023-09-27 | 2023-12-08 | 深圳市国芯物联科技有限公司 | RFID reader-writer capable of dynamic power control |
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