CN212691633U - Intelligent solar street lamp based on GPRS thing networking remote control - Google Patents
Intelligent solar street lamp based on GPRS thing networking remote control Download PDFInfo
- Publication number
- CN212691633U CN212691633U CN201921607437.6U CN201921607437U CN212691633U CN 212691633 U CN212691633 U CN 212691633U CN 201921607437 U CN201921607437 U CN 201921607437U CN 212691633 U CN212691633 U CN 212691633U
- Authority
- CN
- China
- Prior art keywords
- resistor
- street lamp
- lamp
- solar street
- gprs
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
Abstract
The utility model provides an intelligent solar street lamp based on GPRS thing networking remote control, be provided with GPRS communication module in the solar street lamp, the solar street lamp communicates with the remote control center through GPRS communication module, the solar street lamp includes the lamp pole, the fixing base is installed to the lamp pole bottom, lamp pole bottom one side is provided with the control box, be provided with the power supply group in the control box, lamp holder, solar panel and wind power generation set are installed on the lamp pole top, still install LED display screen and camera device on the lamp pole, the power supply group is connected solar panel with wind power generation set, and do lamp holder, LED display screen power supply, the utility model discloses be convenient for manage, convenient to use, very big reduction the maintenance cost of street lamp, make things convenient for the staff to maintain.
Description
Technical Field
The utility model relates to a solar street lamp designs technical field, especially relates to an intelligent solar street lamp based on GPRS thing networking remote control.
Background
Solar energy is an important energy form in new energy sources, the main utilization forms of solar energy include three main ways of solar photothermal conversion, photoelectric conversion and photochemical conversion, and solar energy is a source of many energies on the earth, such as wind energy, chemical energy, potential energy of water and the like, and the energy forms are caused by or converted into the solar energy. The method for utilizing solar energy mainly comprises the following steps: a solar cell converting energy contained in sunlight into electric energy by photoelectric conversion; the solar water heater heats water by using the heat of sunlight, and generates electricity by using the hot water. The solar street lamp is clean and environment-friendly, free of pollution and high in utilization value, and has no energy shortage, various advantages determine the irreplaceable position in energy replacement, based on the wide use of solar energy, the solar street lamp is an important component in daily life of people, although the solar street lamp is greatly improved, the functions are diversified, but the solar street lamp in the prior art has certain defects, such as high management cost, inconvenient maintenance and the like, and needs to be further improved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the not enough of above-mentioned prior art and provide an intelligent solar street lamp based on thing networked control convenient to management and maintenance, have multiple functions, long service life.
The utility model discloses a solve the technical scheme that above-mentioned problem adopted and do:
the utility model provides an intelligent solar street lamp based on GPRS internet of things remote control, a GPRS communication module is arranged in the solar street lamp, the solar street lamp is communicated with a remote control center through the GPRS communication module,
the solar street lamp comprises a lamp post, a fixed seat is arranged at the bottom of the lamp post, a control box is arranged on one side of the bottom of the lamp post, a power supply battery pack is arranged in the control box, a lamp cap, a solar panel and a wind power generation device are arranged at the top end of the lamp post, an LED display screen and a camera device are further arranged on the lamp post, the power supply battery pack is connected with the solar panel and the wind power generation device and supplies power to the lamp cap and the LED display screen,
still install GPS positioner, temperature and humidity detection device and air quality detection device on the lamp pole, GPS positioner, temperature and humidity detection device, air quality detection device, camera device electricity are connected with main control microprocessing unit, main control microprocessing unit still is connected with wireless signal transceiver module, wireless signal transceiver module wireless connection GPRS communication module passes through GPRS communication module communicates with control center, conveys solar street lamp state information to control center and monitors.
Furthermore, the solar panel and the wind power generation device are connected with an inverter and a controller, and the inverter and the controller are electrically connected with the power supply battery pack.
Further, the lamp pole includes the first body of rod and installs the second body of rod in the first body of rod, the lamp pole cross-section is the rectangle, be provided with spout structure in the first body of rod, be provided with on the second body of rod with the corresponding slide rail structure of spout structure, be provided with the sliding block in the second body of rod, first body of rod bottom is provided with the motor, with the motor is connected with the lead screw, the lead screw alternates to be installed in the sliding block, rotates through the lead screw and drives the second body of rod rises or descends, changes the lamp pole height, is convenient for maintain.
Furthermore, the camera device is an infrared camera device, and the camera device is also provided with an infrared sensor and a photosensitive sensor which are connected with the main control micro-processing unit and used for controlling the solar street lamp to be turned on and off.
Furthermore, the power supply battery pack is connected with an electric quantity display circuit for displaying electric quantity information of the power supply battery pack.
Further, the electric quantity display circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6 which are connected with the anode of the power supply battery pack, the sixth resistor R6 is connected with a first light-emitting diode D1, the first light-emitting diode D1 is grounded, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4 and the fifth resistor R5 are sequentially connected in series,
one end of the first resistor R1 is connected with the positive input end of a first comparator Q1, the negative input end of the first comparator Q1 is connected with the negative electrode of the power supply battery, the output end is connected with a second light-emitting diode D2, the other end of the second light-emitting diode D2 is grounded,
one end of the second resistor R2 is connected with the positive input end of a second comparator Q2, the negative input end of the second comparator Q2 is connected with the negative electrode of the power supply battery, the output end is connected with a third light-emitting diode D3, the other end of the third light-emitting diode D3 is grounded,
one end of the third resistor R3 is connected with the positive input end of a third comparator Q3, the negative input end of the third comparator Q3 is connected with the negative electrode of the power supply battery, the output end is connected with a fourth light-emitting diode D4, the other end of the fourth light-emitting diode D4 is grounded,
one end of the fourth resistor R4 is connected to a positive input end of a fourth comparator Q4, a negative input end of the fourth comparator Q4 is connected to a negative electrode of the power supply battery, an output end of the fourth comparator Q4 is connected to a fifth light emitting diode D5, and the other end of the fifth light emitting diode D5 is grounded.
Further, main control module electricity is connected with image acquisition module, image processing module and image analysis module, image acquisition module is used for gathering the image information that camera device gathered, image processing module carries out image quality's improvement to the image of gathering, and image analysis module is used for carrying out the analysis to the positional information of the image of gathering to send the motion state to main control module, whether main control module control lamp holder is luminous to throw light on, and under the darker condition of light, the singlechip acquires under the street lamp and has the moving object to pass through, and the control lamp holder is thrown light on, can make this application more intelligent, more environmental protection, operate under the more energy-conserving condition.
The beneficial effects of the utility model reside in that:
the utility model provides an intelligent solar street lamp based on GPRS thing networking remote control has several following big advantages:
(1) convenient to manage, convenient to use: the street lamp is monitored and managed by the Internet of things big data, the phenomenon that the street lamp is not maintained timely or is managed by no one in the prior art is broken, the street lamp is monitored in real time through the Internet of things, and maintenance personnel can be informed to maintain the street lamp in time when the street lamp is in a problem, so that the service life of the street lamp is effectively protected;
(2) the solar street lamp adopts a wind-electricity complementary mode, effectively overcomes the defect that electric energy cannot be supplemented by solar energy under the condition of no solar energy or dark weather at night, ensures that the street lamp can be used for a longer time, and improves the service efficiency of the street lamp;
(3) this application adopts lift lamp pole structural design, very big reduction the maintenance cost of street lamp, make things convenient for the staff to maintain.
Drawings
Fig. 1 is a schematic diagram of the structure of an intelligent solar street lamp based on GPRS internet of things remote control;
fig. 2 is an internal structure diagram of the intelligent solar street lamp based on GPRS internet of things remote control;
fig. 3 is a schematic view of an installation structure of an intelligent solar street lamp based on GPRS internet of things remote control;
fig. 4 is a schematic block diagram of the intelligent solar street lamp based on GPRS internet of things remote control;
fig. 5 is a C8051F020 chip structure diagram of the intelligent solar street lamp based on GPRS internet of things remote control of the present invention;
fig. 6 is a circuit diagram showing the electric quantity of the intelligent solar street lamp based on the GPRS internet of things remote control;
fig. 7 is the utility model relates to an intelligent solar street lamp's photosensitive resistance circuit diagram based on GPRS thing networking remote control.
Detailed Description
The following embodiments of the present invention are specifically explained with reference to the accompanying drawings, which are used for reference and illustration only and do not limit the scope of the present invention.
As shown in fig. 1-7, the utility model provides an intelligent solar street lamp based on GPRS internet of things remote control, a GPRS communication module is arranged in the solar street lamp, the solar street lamp communicates with a remote control center through the GPRS communication module,
the solar street lamp comprises a lamp post 1, a fixed seat 2 is arranged at the bottom of the lamp post 1, a control box is arranged on one side of the bottom of the lamp post 1, a power supply battery pack is arranged in the control box, a lamp holder 3, a solar panel 4 and a wind power generation device 5 are arranged at the top end of the lamp post 1, an LED display screen 6 and a camera device 7 are further arranged on the lamp post 1, the power supply battery pack is connected with the solar panel 4 and the wind power generation device 5 and supplies power to the lamp holder 3 and the LED display screen 6,
still install GPS positioner, temperature and humidity detection device and air quality detection device on the lamp pole 1, GPS positioner, temperature and humidity detection device, air quality detection device, camera device 7 electricity are connected with the main control microprocessing unit, the main control microprocessing unit still is connected with wireless signal transceiver module, wireless signal transceiver module wireless connection GPRS communication module, through GPRS communication module communicates with control center, conveys solar street lamp state information to control center and monitors, and air quality detection device is for adopting AS-AQM201 air quality module, and AS-AQM201 air quality module's relevant parameter is AS follows:
output signal definition FWM (period 100ms)
| High ms | Pollution grade |
| 0 | 0 |
| 10 | 1 |
| 20 | 2 |
| 30 | 3 |
| 40 | 4 |
| 50 | 5 |
| 60 | 6 |
| 70 | 7 |
| 80 | 8 |
| 90 | 9 |
| 100 | 10 |
In the application, the master control microprocessing unit adopts a completely integrated mixed signal system MCU C8051F020 singlechip, all analog and digital peripherals of the C8051F020 singlechip can be enabled/disabled and configured by user firmware, the FLASH memory also has the ability of reprogramming in the system, can be used for nonvolatile data storage and allows the 8051 firmware to be updated on site, and the on-chip JTAG debugging circuit allows a product MCU installed on a final application system to be used for non-intrusive (not occupying on-chip resources), full speed and on-system debugging. The debugging system supports observation and modification of memories and registers, supports breakpoint, observation point, single step and operation and shutdown commands, and can fully operate all analog and digital peripherals when JTAG debugging is used.
In this embodiment, the solar panel 4 and the wind power generation device 5 are connected to an inverter and a controller, and are electrically connected to the power supply battery pack through the inverter and the controller.
In this embodiment, the lamp post 1 includes a first post body 11 and a second post body 12 installed in the first post body 11, the cross section of the lamp post 1 is rectangular, a sliding groove structure 13 is provided in the first post body 11, a sliding rail structure 14 corresponding to the sliding groove structure 13 is provided on the second post body 12, a sliding block 15 is provided in the second post body 12, a motor 16 is provided at the bottom of the first post body 11, the motor 16 is connected with a lead screw 17, the lead screw 17 is installed in the sliding block 15 in a penetrating manner, and the second post body 12 is driven to ascend or descend by the rotation of the lead screw 17, so that the height of the lamp post 1 is changed, and the maintenance is facilitated.
In this embodiment, the camera device 7 is an infrared camera device 7, the camera device 7 is further provided with an infrared sensor and a photosensitive sensor connected with the main control microprocessor unit, used for controlling the on and off of the solar street lamp, the photosensitive sensor comprises a photosensitive resistor and a peripheral circuit of the photosensitive resistor, when the brightness of the light irradiated on the photoresistor changes, the organization of the photoresistor also changes, the environment is detected by a circuit formed by the photoresistor and a comparator A100, the photoresistor and a resistor R100 are connected in series and divided into voltage to the inverting input end of the comparator A100, a resistor R200 and a resistor R300 are connected in series and divided into voltage to the positive input end of the comparator A100, when the illumination intensity is available, the resistance value of the photosensitive resistor is 5M, the voltage of the inverting terminal is 0.2V, when the illumination intensity is unavailable, the resistance is about 50K, and the voltage of the inverting terminal is 4V. Therefore, when the light intensity is present, the inverting input end is larger than the forward input end, the output of the comparator A100 is at a low level, when the light intensity is absent, the inverting input end is smaller than the forward input end, the output of the comparator A100 is at a high level, and the single chip microcomputer can execute corresponding operation according to the level.
In this embodiment, the power supply battery pack is connected with an electric quantity display circuit for displaying electric quantity information of the power supply battery pack.
In this embodiment, the power display circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6 connected to the positive electrode of the power supply battery pack, the sixth resistor R6 is connected to a first light emitting diode D1, the first light emitting diode D1 is grounded, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4 and the fifth resistor R5 are sequentially connected in series,
one end of the first resistor R1 is connected with the positive input end of a first comparator Q1, the negative input end of the first comparator Q1 is connected with the negative electrode of the power supply battery, the output end is connected with a second light-emitting diode D2, the other end of the second light-emitting diode D2 is grounded,
one end of the second resistor R2 is connected with the positive input end of a second comparator Q2, the negative input end of the second comparator Q2 is connected with the negative electrode of the power supply battery, the output end is connected with a third light-emitting diode D3, the other end of the third light-emitting diode D3 is grounded,
one end of the third resistor R3 is connected with the positive input end of a third comparator Q3, the negative input end of the third comparator Q3 is connected with the negative electrode of the power supply battery, the output end is connected with a fourth light-emitting diode D4, the other end of the fourth light-emitting diode D4 is grounded,
one end of the fourth resistor R4 is connected to a positive input end of a fourth comparator Q4, a negative input end of the fourth comparator Q4 is connected to a negative electrode of the power supply battery, an output end of the fourth comparator Q4 is connected to a fifth light emitting diode D5, and the other end of the fifth light emitting diode D5 is grounded.
In this embodiment, main control module electricity is connected with image acquisition module, image processing module and image analysis module, image acquisition module is used for gathering the image information that camera device 7 gathered, image processing module carries out image quality's improvement to the image of gathering, and image analysis module is used for carrying out the analysis to the positional information of the image of gathering to send the motion state to main control module, whether main control module control lamp holder 3 is luminous to throw light on.
The utility model provides an intelligent solar street lamp based on GPRS thing networking remote control has several following big advantages:
(1) convenient to manage, convenient to use: the street lamp is monitored and managed by the Internet of things big data, the phenomenon that the street lamp is not maintained timely or is managed by no one in the prior art is broken, the street lamp is monitored in real time through the Internet of things, and maintenance personnel can be informed to maintain the street lamp in time when the street lamp is in a problem, so that the service life of the street lamp is effectively protected;
(2) the wind power complementation mode is adopted, so that the defect that electric energy cannot be supplemented through solar energy under the condition of no solar energy or dark weather at night is effectively overcome, the street lamp can be used for a long time, and the use efficiency of the street lamp is improved;
(3) this application adopts lift lamp pole structural design, very big reduction the maintenance cost of street lamp, make things convenient for the staff to maintain.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (7)
1. The utility model provides an intelligent solar street lamp based on GPRS thing networking remote control which characterized in that: the solar street lamp is internally provided with a GPRS communication module and is communicated with a remote control center through the GPRS communication module,
the solar street lamp comprises a lamp post, a fixed seat is arranged at the bottom of the lamp post, a control box is arranged on one side of the bottom of the lamp post, a power supply battery pack is arranged in the control box, a lamp cap, a solar panel and a wind power generation device are arranged at the top end of the lamp post, an LED display screen and a camera device are further arranged on the lamp post, the power supply battery pack is connected with the solar panel and the wind power generation device and supplies power to the lamp cap and the LED display screen,
still install GPS positioner, temperature and humidity detection device and air quality detection device on the lamp pole, GPS positioner, temperature and humidity detection device, air quality detection device, camera device electricity are connected with main control microprocessing unit, main control microprocessing unit still is connected with wireless signal transceiver module, wireless signal transceiver module wireless connection GPRS communication module passes through GPRS communication module communicates with control center, conveys solar street lamp state information to control center and monitors.
2. The intelligent solar street lamp based on GPRS thing networking remote control of claim 1, characterized in that: the solar panel and the wind power generation device are connected with an inverter and a controller, and the inverter and the controller are electrically connected with the power supply battery pack.
3. The intelligent solar street lamp based on GPRS thing networking remote control of claim 1, characterized in that: the lamp pole includes the first body of rod and installs the second body of rod in the first body of rod, the lamp pole cross-section is the rectangle, be provided with spout structure in the first body of rod, be provided with on the second body of rod with the corresponding slide rail structure of spout structure, be provided with the sliding block in the second body of rod, first body of rod bottom is provided with the motor, with the motor is connected with the lead screw, the lead screw alternates to be installed in the sliding block, rotate through the lead screw and drive the second body of rod rises or descends, changes the lamp pole height, the maintenance of being convenient for.
4. The intelligent solar street lamp based on GPRS thing networking remote control of claim 1, characterized in that: the camera device is an infrared camera device, and an infrared sensor and a photosensitive sensor which are connected with the main control micro-processing unit are further arranged on the camera device and used for controlling the solar street lamp to be turned on and off.
5. The intelligent solar street lamp based on GPRS thing networking remote control of claim 1, characterized in that: the power supply battery pack is connected with an electric quantity display circuit and used for displaying electric quantity information of the power supply battery pack.
6. The intelligent solar street lamp based on GPRS thing networking remote control of claim 5, characterized in that: the electric quantity display circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6 which are connected with the anode of the power supply battery pack, the sixth resistor R6 is connected with a first light-emitting diode D1, the first light-emitting diode D1 is grounded, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4 and the fifth resistor R5 are sequentially connected in series,
one end of the first resistor R1 is connected with the positive input end of a first comparator Q1, the negative input end of the first comparator Q1 is connected with the negative electrode of the power supply battery, the output end is connected with a second light-emitting diode D2, the other end of the second light-emitting diode D2 is grounded,
one end of the second resistor R2 is connected with the positive input end of a second comparator Q2, the negative input end of the second comparator Q2 is connected with the negative electrode of the power supply battery, the output end is connected with a third light-emitting diode D3, the other end of the third light-emitting diode D3 is grounded,
one end of the third resistor R3 is connected with the positive input end of a third comparator Q3, the negative input end of the third comparator Q3 is connected with the negative electrode of the power supply battery, the output end is connected with a fourth light-emitting diode D4, the other end of the fourth light-emitting diode D4 is grounded,
one end of the fourth resistor R4 is connected to a positive input end of a fourth comparator Q4, a negative input end of the fourth comparator Q4 is connected to a negative electrode of the power supply battery, an output end of the fourth comparator Q4 is connected to a fifth light emitting diode D5, and the other end of the fifth light emitting diode D5 is grounded.
7. The intelligent solar street lamp based on GPRS thing networking remote control of claim 1, characterized in that: the main control module is electrically connected with an image acquisition module, an image processing module and an image analysis module, the image acquisition module is used for acquiring image information acquired by the camera device, the image processing module is used for improving the image quality of the acquired image, the image analysis module is used for analyzing the position information of the acquired image and sending the motion state to the main control module, and the main control module controls whether the lamp holder emits light for illumination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921607437.6U CN212691633U (en) | 2019-09-25 | 2019-09-25 | Intelligent solar street lamp based on GPRS thing networking remote control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921607437.6U CN212691633U (en) | 2019-09-25 | 2019-09-25 | Intelligent solar street lamp based on GPRS thing networking remote control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212691633U true CN212691633U (en) | 2021-03-12 |
Family
ID=74892415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921607437.6U Expired - Fee Related CN212691633U (en) | 2019-09-25 | 2019-09-25 | Intelligent solar street lamp based on GPRS thing networking remote control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212691633U (en) |
-
2019
- 2019-09-25 CN CN201921607437.6U patent/CN212691633U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6505609B2 (en) | Street light | |
| KR20130142609A (en) | Led street lamp controlling apparatus having functions of detecting and transfering complex information | |
| CN205040082U (en) | Street lamp and street lamp control system based on big dipper communication technology | |
| CN204856911U (en) | Energy -saving achromatopsia traffic light | |
| CN112351563A (en) | Intelligent illuminating lamp capable of automatically adjusting illumination range | |
| CN212691633U (en) | Intelligent solar street lamp based on GPRS thing networking remote control | |
| CN203980113U (en) | A kind of solar street light | |
| CN209072775U (en) | Intelligent road-lamp remote controllers | |
| CN209130710U (en) | A kind of controlled by sound and light solar street light based on acousto-optic detection | |
| CN203039963U (en) | PIC 18 F6720 based wind-solar hybrid street-lamp controller | |
| CN202634766U (en) | PV and wind energy complementary generation energy-saving lamp | |
| CN202216160U (en) | Integrative solar energy navigation light | |
| CN205560590U (en) | Intelligent street lamp | |
| CN205716974U (en) | A kind of solar energy garden lamp | |
| CN108897071A (en) | Photoelectricity weather station | |
| CN204517750U (en) | Indoor security solar emergency power supply | |
| CN209638906U (en) | A kind of solar street light intelligent central control system | |
| CN112040607A (en) | Intelligent photovoltaic street lamp system with visual management function | |
| CN204127855U (en) | A kind of street lamp with litterbin | |
| CN109302782B (en) | Information processing method and device based on intelligent street lamp | |
| CN203825402U (en) | Environment-friendly intelligent dustbin control system | |
| CN211203896U (en) | Wisdom solar street lamp | |
| CN207124795U (en) | A kind of smart city illumination management system based on multistage communication | |
| CN208606092U (en) | A kind of energy-saving garden lamp with monitoring function | |
| CN206036920U (en) | Photovoltaic leaded light daylighting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210312 Termination date: 20210925 |