CN203908563U - Ultra-miniature air-flow sensor - Google Patents
Ultra-miniature air-flow sensor Download PDFInfo
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- CN203908563U CN203908563U CN201420233017.7U CN201420233017U CN203908563U CN 203908563 U CN203908563 U CN 203908563U CN 201420233017 U CN201420233017 U CN 201420233017U CN 203908563 U CN203908563 U CN 203908563U
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Abstract
The utility model discloses an ultra-miniature air-flow sensor, comprising a main circuit and an auxiliary circuit connected in sequence. The main circuit comprises an ultra-miniature air-flow sensing module U1 whose model is AF1211, and a first contact connector P1 and a second contact connector P2 respectively connected with the ultra-miniature air-flow sensing module U1. The ultra-miniature air-flow sensing module U1 is connected with the auxiliary circuit. The ultra-miniature air-flow sensor can overcome defects in the prior art of short service life, high cost, and low reliability, and is advantaged by long service life, low cost, and high reliability.
Description
Technical field
The utility model relates to communication technical field, particularly, relates to a kind of superminiature pneumatic sensor.
Background technology
The composition module package of wireless senser is in a shell, when work, it will provide power supply by battery or vibrating electricity generator, form wireless sensor network node, by the Node that is integrated with sensor, data processing unit and communication module of stochastic distribution, the mode by self-organization forms network.It can collecting device digital signal by wireless sensor network, be transferred to the radio network gateway of Surveillance center, directly send into computing machine, carry out analyzing and processing.If needed, the whole time history signal that wireless senser also can real-time Transmission gathers.The information wireless such as Surveillance center also can control by gateway handle, parameter arranges are transferred to node.Data conditioning acquisition processing module through amplifying, after the modulate circuits such as filtering, is delivered to analog to digital converter the feeble signal of sensor output, changes digital signal into, delivers to primary processor and carries out digital signal processing, calculates the effective value, shift value of sensor etc.
In realizing process of the present utility model, inventor finds at least to exist in prior art the defect such as serviceable life is short, cost is high and reliability is low.
Utility model content
The purpose of this utility model is, for the problems referred to above, proposes a kind of superminiature pneumatic sensor, to realize long service life, cost is low and reliability is high advantage.
For achieving the above object, the technical solution adopted in the utility model is: a kind of superminiature pneumatic sensor, comprises the main circuit and the auxiliary circuit that connect successively; Described main circuit comprises that model is the superminiature air-flow sensing module U1 of AF1211, and the first contact pin connector P1 and the second contact pin connector P2 that are connected with described superminiature air-flow sensing module U1 respectively; Described superminiature air-flow sensing module U1 is connected with auxiliary circuit.
Further, described superminiature air-flow sensing module U1, comprises transformer M42, detector, the first diode, the second diode, thyristor, relay, the first resistance, the second resistance, rheostat, the first electric capacity and the second electric capacity, wherein:
The primary coil of described transformer M42 connects AC power, the first link of the first secondary coil of transformer M42 is connected with the second link with the first link of detector respectively with the second link, the adjustable end of the second secondary coil of transformer M42 is connected with the second link of transformer M42 the first secondary coil, the adjustable end of the second secondary coil of transformer M42 is connected with the second link of the second secondary coil of transformer M42, first of the second secondary coil of transformer M42 connects the anode of termination the first diode, the negative electrode of the first diode is connected with the positive pole of the first electric capacity and the first link of relay switch respectively,
The negative pole of described the first electric capacity, is connected with rheostatic the second link with the second link of the second secondary coil of transformer M42, the second link of the negative electrode of thyristor, the second electric capacity respectively; The 3rd link of transformer M42 is connected with rheostatic the first link through the first resistance, and rheostatic adjustable end is connected with the first link of the second electric capacity and the control end of thyristor respectively after the second resistance; The anode of thyristor is connected with the anode of the second diode and the second link of relay coil respectively; The first link of relay coil is connected with the negative electrode of the second diode with the second link of relay switch respectively.
Further, described main circuit, also comprise that one end is connected with the second link of superminiature air-flow sensing module U1 with the 1st link of superminiature air-flow sensing module U1, the first capacitor C 21 of other end ground connection, one end is connected with the 29th link of superminiature air-flow sensing module U1 with the 28th link of superminiature air-flow sensing module U1, the second capacitor C 291 of other end ground connection, one end is connected with the 30th link of superminiature air-flow sensing module U1, the 3rd capacitor C 301 of other end ground connection, one end is connected with the 31st link of superminiature air-flow sensing module U1, the 4th capacitor C 311 of other end ground connection, and be connected to the 31st link of superminiature air-flow sensing module U1 and the first resistance R 311 between the second contact pin connector P2.
Further, described auxiliary circuit, comprise that one end is connected with the 29th link of superminiature air-flow sensing module U1 with the 28th link of superminiature air-flow sensing module U1 respectively, the other end the 4th capacitor C 191, the 5th capacitor C 221, the 6th capacitor C 251, the 7th capacitor C 261 and the 8th capacitor C 1 of ground connection respectively, and one end and the 8th capacitor C 1 one end is remotely connected, the other end is connected with direct supply VDD the first inductance L 1;
The common port of described the 5th capacitor C 221 and the 28th link of superminiature air-flow sensing module U1 and the 29th link of superminiature air-flow sensing module U1, is also connected with the 22nd link of superminiature air-flow sensing module U1; The common port of the 6th capacitor C 251 and the 28th link of superminiature air-flow sensing module U1 and the 29th link of superminiature air-flow sensing module U1, is also connected with the 25th link of superminiature air-flow sensing module U1; The common port of the 7th capacitor C 261 and the 28th link of superminiature air-flow sensing module U1 and the 29th link of superminiature air-flow sensing module U1, is also connected with the 26th link of superminiature air-flow sensing module U1.
Further, described auxiliary circuit, also comprise and be connected to the 23rd link of superminiature air-flow sensing module U1 and the 9th capacitor C 231 between ground in turn, the second inductance L 232, the 3rd inductance L 233, the tenth capacitor C 235 and toggle switch P3, be connected to the 4th inductance L 241 between the common port of the 9th capacitor C 231 and the second inductance L 232 and the 24th link of superminiature air-flow sensing module U1, and, one end is connected with the common port of the 4th inductance L 241 with the 24th link of superminiature air-flow sensing module U1, the 11 capacitor C 241 of other end ground connection, one end is connected with the common port of the 3rd inductance L 233 with the second inductance L 232, the 12 capacitor C 232 of other end ground connection, one end is connected with the common port of the tenth capacitor C 235 with the 3rd inductance L 233, the 13 capacitor C 233 of other end ground connection.
Further, described auxiliary circuit, also comprise that one end is connected with the 17th end of superminiature air-flow sensing module U1, the 14 capacitor C 171 of other end ground connection, one end is connected with the 18th end of superminiature air-flow sensing module U1, the 15 capacitor C 181 of other end ground connection, one end is connected with the 21st end of superminiature air-flow sensing module U1, the 16 capacitor C 211 of other end ground connection, one end is connected with the 20th end of superminiature air-flow sensing module U1, the 17 capacitor C 201 of other end ground connection, and, one end is connected with the 27th end of superminiature air-flow sensing module U1, the second resistance R 271 of other end ground connection.
Further, described auxiliary circuit, also comprise the first crystal oscillator X1 between the common port of the 20th end that is connected to the 17 capacitor C 201 and superminiature air-flow sensing module U1 and the common port of the 21st end of the 16 capacitor C 211 and superminiature air-flow sensing module U1, and, be connected to the second crystal oscillator X2 between the common port of the 17th end of the 14 capacitor C 171 and superminiature air-flow sensing module U1 and the common port of the 18th end of the 15 capacitor C 181 and superminiature air-flow sensing module U1.
The superminiature pneumatic sensor of each embodiment of the utility model, owing to comprising main circuit and the auxiliary circuit connecting successively; Main circuit comprises that model is the superminiature air-flow sensing module U1 of AF1211, and the first contact pin connector P1 and the second contact pin connector P2 that are connected with superminiature air-flow sensing module U1 respectively; Superminiature air-flow sensing module U1 is connected with auxiliary circuit; Can adopt a sensitive air-flow flip flop equipment to detect Air Flow; Thereby can overcome the defect that in prior art, serviceable life is short, cost is high and reliability is low, to realize long service life, cost is low and reliability is high advantage.
Other features and advantages of the utility model will be set forth in the following description, and, partly from instructions, become apparent, or understand by implementing the utility model.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for instructions, is used from explanation the utility model with embodiment mono-of the present utility model, does not form restriction of the present utility model.In the accompanying drawings:
In Fig. 1, (a) is the structural representation of main circuit in the utility model superminiature pneumatic sensor, (b) is the pin figure of U1;
Fig. 2 is the structural representation of auxiliary circuit in the utility model superminiature pneumatic sensor.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for description and interpretation the utility model, and be not used in restriction the utility model.
According to the utility model embodiment, as depicted in figs. 1 and 2, provide a kind of superminiature pneumatic sensor, can be by measuring cell voltage in the time interval of appointment, with wireless mode, send to rear end, the voltage readings of Real-Time Monitoring battery system, thus determine cell health state.
The superminiature pneumatic sensor of the present embodiment, comprises the main circuit and the auxiliary circuit that connect successively.
Wherein, above-mentioned main circuit comprises that model is the superminiature air-flow sensing module U1 of AF1211, and the first contact pin connector P1 and the second contact pin connector P2 that are connected with superminiature air-flow sensing module U1 respectively; Superminiature air-flow sensing module U1 is connected with auxiliary circuit.Main circuit, also comprise that one end is connected with the second link of superminiature air-flow sensing module U1 with the 1st link of superminiature air-flow sensing module U1, the first capacitor C 21 of other end ground connection, one end is connected with the 29th link of superminiature air-flow sensing module U1 with the 28th link of superminiature air-flow sensing module U1, the second capacitor C 291 of other end ground connection, one end is connected with the 30th link of superminiature air-flow sensing module U1, the 3rd capacitor C 301 of other end ground connection, one end is connected with the 31st link of superminiature air-flow sensing module U1, the 4th capacitor C 311 of other end ground connection, and be connected to the 31st link of superminiature air-flow sensing module U1 and the first resistance R 311 between the second contact pin connector P2.
Particularly, above-mentioned superminiature air-flow sensing module U1, comprise transformer M42, detector, the first diode, the second diode, thyristor, relay, the first resistance, the second resistance, rheostat, the first electric capacity and the second electric capacity, wherein: the primary coil of transformer M42 connects AC power, the first link of the first secondary coil of transformer M42 is connected with the second link with the first link of detector respectively with the second link, the adjustable end of the second secondary coil of transformer M42 is connected with the second link of transformer M42 the first secondary coil, the adjustable end of the second secondary coil of transformer M42 is connected with the second link of the second secondary coil of transformer M42, first of the second secondary coil of transformer M42 connects the anode of termination the first diode, the negative electrode of the first diode is connected with the positive pole of the first electric capacity and the first link of relay switch respectively, the negative pole of the first electric capacity, is connected with rheostatic the second link with the second link of the second secondary coil of transformer M42, the second link of the negative electrode of thyristor, the second electric capacity respectively, the 3rd link of transformer M42 is connected with rheostatic the first link through the first resistance, and rheostatic adjustable end is connected with the first link of the second electric capacity and the control end of thyristor respectively after the second resistance, the anode of thyristor is connected with the anode of the second diode and the second link of relay coil respectively, the first link of relay coil is connected with the negative electrode of the second diode with the second link of relay switch respectively.
Above-mentioned auxiliary circuit, comprise that one end is connected with the 29th link of superminiature air-flow sensing module U1 with the 28th link of superminiature air-flow sensing module U1 respectively, the other end the 4th capacitor C 191, the 5th capacitor C 221, the 6th capacitor C 251, the 7th capacitor C 261 and the 8th capacitor C 1 of ground connection respectively, and one end and the 8th capacitor C 1 one end is remotely connected, the other end is connected with direct supply VDD the first inductance L 1; The common port of the 5th capacitor C 221 and the 28th link of superminiature air-flow sensing module U1 and the 29th link of superminiature air-flow sensing module U1, is also connected with the 22nd link of superminiature air-flow sensing module U1; The common port of the 6th capacitor C 251 and the 28th link of superminiature air-flow sensing module U1 and the 29th link of superminiature air-flow sensing module U1, is also connected with the 25th link of superminiature air-flow sensing module U1; The common port of the 7th capacitor C 261 and the 28th link of superminiature air-flow sensing module U1 and the 29th link of superminiature air-flow sensing module U1, is also connected with the 26th link of superminiature air-flow sensing module U1.Auxiliary circuit, also comprise and be connected to the 23rd link of superminiature air-flow sensing module U1 and the 9th capacitor C 231 between ground in turn, the second inductance L 232, the 3rd inductance L 233, the tenth capacitor C 235 and toggle switch P3, be connected to the 4th inductance L 241 between the common port of the 9th capacitor C 231 and the second inductance L 232 and the 24th link of superminiature air-flow sensing module U1, and, one end is connected with the common port of the 4th inductance L 241 with the 24th link of superminiature air-flow sensing module U1, the 11 capacitor C 241 of other end ground connection, one end is connected with the common port of the 3rd inductance L 233 with the second inductance L 232, the 12 capacitor C 232 of other end ground connection, one end is connected with the common port of the tenth capacitor C 235 with the 3rd inductance L 233, the 13 capacitor C 233 of other end ground connection.Auxiliary circuit, also comprise that one end is connected with the 17th end of superminiature air-flow sensing module U1, the 14 capacitor C 171 of other end ground connection, one end is connected with the 18th end of superminiature air-flow sensing module U1, the 15 capacitor C 181 of other end ground connection, one end is connected with the 21st end of superminiature air-flow sensing module U1, the 16 capacitor C 211 of other end ground connection, one end is connected with the 20th end of superminiature air-flow sensing module U1, the 17 capacitor C 201 of other end ground connection, and, one end is connected with the 27th end of superminiature air-flow sensing module U1, the second resistance R 271 of other end ground connection.Auxiliary circuit, also comprise the first crystal oscillator X1 between the common port of the 20th end that is connected to the 17 capacitor C 201 and superminiature air-flow sensing module U1 and the common port of the 21st end of the 16 capacitor C 211 and superminiature air-flow sensing module U1, and, be connected to the second crystal oscillator X2 between the common port of the 17th end of the 14 capacitor C 171 and superminiature air-flow sensing module U1 and the common port of the 18th end of the 15 capacitor C 181 and superminiature air-flow sensing module U1.
For example, the sensor that the model of can take is LMS-9-AF-W1-ST is example, and the superminiature pneumatic sensor of above-described embodiment is specifically described.
The superminiature pneumatic sensor of above-described embodiment, adopts a sensitive air-flow flip flop equipment to detect Air Flow, and for the monitoring of heating power pipeline or air-conditioning duct working pressure, user can self-defined threshold value and warning message.
The purposes of above-described embodiment superminiature pneumatic sensor, comprising: Heating,Ventilating and Air Conditioning (HVAC) monitoring, Heating,Ventilating and Air Conditioning (HVAC) efficiency test.
The power supply mode of above-described embodiment superminiature pneumatic sensor, comprises 3.0V button cell (CR2032).
The technical indicator of above-described embodiment superminiature pneumatic sensor, comprising: 433MHz/900 MHz frequency of operation, and removable 3.0V button cell, temperature range-20 ° C is+60 ° of C extremely, the outer transmission range (depending on battery electric quantity) of 70 100 meters of – sight lines; By 1 hour monitoring frequency, sustainable work 2 years; When air-flow continues to surpass 2 seconds, indicated, airless indication also can be set, adopt crooked piezoelectric sensor, user-defined threshold alerts and notice, be the ideal chose of Embedded Application, user-defined threshold alerts and notification message.
The detailed technology parameter of above-described embodiment superminiature pneumatic sensor, comprising: radio frequency specification is frequency of operation 433MHz or 900 MHz (according to rules and customer requirement); Circuit specification is the replaceable 3.0V button cell of battery types; Maximum operation temperature-20 ° C is to+60 ° of C; Best battery operated temperature (button cell)+10 ° C is to+50 ° of C; Supply voltage 2.0-3.6 V; The outer transmission range (depending on battery electric quantity) of 70 100 meters of – sight lines; By 1 hour monitoring frequency, sustainable work 2 years; ABS engineering plastics shell.
The specification of above-described embodiment superminiature pneumatic sensor, comprising: sensor type is crooked piezoelectric sensor, and base resistance is 100K ~ 500K ohm.
LinkMote adopts the Sensor Network core technology of the peaceful gram of independent research in Jiangsu.The wireless sensor network node of LinkMote exploitation has adopted SoC SOC (system on a chip) scheme, has used the embedded OS of independent research simultaneously, and at present domestic other producer's products adopt zigbee host-host protocol, data transmission rate fiduciary level 70%; LinkMote adopts the autonomous procotol of AxonWeb, and data transmission rate fiduciary level reaches 99.3%.
The size of above-described embodiment superminiature pneumatic sensor, is preferably long 45 millimeters * wide 26 millimeters * high 20 millimeters.
The packing content thing of above-described embodiment superminiature pneumatic sensor external packing, comprising: wireless senser (being superminiature pneumatic sensor), CR2032 button cell, installs screw and paster (the seamless glue material of 3M) is installed.
Finally it should be noted that: the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although the utility model is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. a superminiature pneumatic sensor, is characterized in that, comprises the main circuit and the auxiliary circuit that connect successively; Described main circuit comprises that model is the superminiature air-flow sensing module U1 of AF1211, and the first contact pin connector P1 and the second contact pin connector P2 that are connected with described superminiature air-flow sensing module U1 respectively; Described superminiature air-flow sensing module U1 is connected with auxiliary circuit.
2. superminiature pneumatic sensor according to claim 1, it is characterized in that, described superminiature air-flow sensing module U1, comprise transformer M42, detector, the first diode, the second diode, thyristor, relay, the first resistance, the second resistance, rheostat, the first electric capacity and the second electric capacity, wherein:
The primary coil of described transformer M42 connects AC power, the first link of the first secondary coil of transformer M42 is connected with the second link with the first link of detector respectively with the second link, the adjustable end of the second secondary coil of transformer M42 is connected with the second link of transformer M42 the first secondary coil, the adjustable end of the second secondary coil of transformer M42 is connected with the second link of the second secondary coil of transformer M42, first of the second secondary coil of transformer M42 connects the anode of termination the first diode, the negative electrode of the first diode is connected with the positive pole of the first electric capacity and the first link of relay switch respectively,
The negative pole of described the first electric capacity, is connected with rheostatic the second link with the second link of the second secondary coil of transformer M42, the second link of the negative electrode of thyristor, the second electric capacity respectively; The 3rd link of transformer M42 is connected with rheostatic the first link through the first resistance, and rheostatic adjustable end is connected with the first link of the second electric capacity and the control end of thyristor respectively after the second resistance; The anode of thyristor is connected with the anode of the second diode and the second link of relay coil respectively; The first link of relay coil is connected with the negative electrode of the second diode with the second link of relay switch respectively.
3. superminiature pneumatic sensor according to claim 1 and 2, it is characterized in that, described main circuit, also comprise that one end is connected with the second link of superminiature air-flow sensing module U1 with the 1st link of superminiature air-flow sensing module U1, the first capacitor C 21 of other end ground connection, one end is connected with the 29th link of superminiature air-flow sensing module U1 with the 28th link of superminiature air-flow sensing module U1, the second capacitor C 291 of other end ground connection, one end is connected with the 30th link of superminiature air-flow sensing module U1, the 3rd capacitor C 301 of other end ground connection, one end is connected with the 31st link of superminiature air-flow sensing module U1, the 4th capacitor C 311 of other end ground connection, and be connected to the 31st link of superminiature air-flow sensing module U1 and the first resistance R 311 between the second contact pin connector P2.
4. superminiature pneumatic sensor according to claim 3, it is characterized in that, described auxiliary circuit, comprise that one end is connected with the 29th link of superminiature air-flow sensing module U1 with the 28th link of superminiature air-flow sensing module U1 respectively, the other end the 4th capacitor C 191, the 5th capacitor C 221, the 6th capacitor C 251, the 7th capacitor C 261 and the 8th capacitor C 1 of ground connection respectively, and one end and the 8th capacitor C 1 one end is remotely connected, the other end is connected with direct supply VDD the first inductance L 1;
The common port of described the 5th capacitor C 221 and the 28th link of superminiature air-flow sensing module U1 and the 29th link of superminiature air-flow sensing module U1, is also connected with the 22nd link of superminiature air-flow sensing module U1; The common port of the 6th capacitor C 251 and the 28th link of superminiature air-flow sensing module U1 and the 29th link of superminiature air-flow sensing module U1, is also connected with the 25th link of superminiature air-flow sensing module U1; The common port of the 7th capacitor C 261 and the 28th link of superminiature air-flow sensing module U1 and the 29th link of superminiature air-flow sensing module U1, is also connected with the 26th link of superminiature air-flow sensing module U1.
5. superminiature pneumatic sensor according to claim 4, it is characterized in that, described auxiliary circuit, also comprise and be connected to the 23rd link of superminiature air-flow sensing module U1 and the 9th capacitor C 231 between ground in turn, the second inductance L 232, the 3rd inductance L 233, the tenth capacitor C 235 and toggle switch P3, be connected to the 4th inductance L 241 between the common port of the 9th capacitor C 231 and the second inductance L 232 and the 24th link of superminiature air-flow sensing module U1, and, one end is connected with the common port of the 4th inductance L 241 with the 24th link of superminiature air-flow sensing module U1, the 11 capacitor C 241 of other end ground connection, one end is connected with the common port of the 3rd inductance L 233 with the second inductance L 232, the 12 capacitor C 232 of other end ground connection, one end is connected with the common port of the tenth capacitor C 235 with the 3rd inductance L 233, the 13 capacitor C 233 of other end ground connection.
6. superminiature pneumatic sensor according to claim 5, it is characterized in that, described auxiliary circuit, also comprise that one end is connected with the 17th end of superminiature air-flow sensing module U1, the 14 capacitor C 171 of other end ground connection, one end is connected with the 18th end of superminiature air-flow sensing module U1, the 15 capacitor C 181 of other end ground connection, one end is connected with the 21st end of superminiature air-flow sensing module U1, the 16 capacitor C 211 of other end ground connection, one end is connected with the 20th end of superminiature air-flow sensing module U1, the 17 capacitor C 201 of other end ground connection, and, one end is connected with the 27th end of superminiature air-flow sensing module U1, the second resistance R 271 of other end ground connection.
7. superminiature pneumatic sensor according to claim 6, it is characterized in that, described auxiliary circuit, also comprise the first crystal oscillator X1 between the common port of the 20th end that is connected to the 17 capacitor C 201 and superminiature air-flow sensing module U1 and the common port of the 21st end of the 16 capacitor C 211 and superminiature air-flow sensing module U1, and, be connected to the second crystal oscillator X2 between the common port of the 17th end of the 14 capacitor C 171 and superminiature air-flow sensing module U1 and the common port of the 18th end of the 15 capacitor C 181 and superminiature air-flow sensing module U1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420233017.7U CN203908563U (en) | 2014-05-07 | 2014-05-07 | Ultra-miniature air-flow sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420233017.7U CN203908563U (en) | 2014-05-07 | 2014-05-07 | Ultra-miniature air-flow sensor |
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| CN203908563U true CN203908563U (en) | 2014-10-29 |
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| CN201420233017.7U Expired - Fee Related CN203908563U (en) | 2014-05-07 | 2014-05-07 | Ultra-miniature air-flow sensor |
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Effective date of registration: 20160420 Address after: 214000 Jiangsu province Xinda Wuxi new Wu Road 33-2-801-04 (IC No. A804 building design) Patentee after: Wuxi Jin Ke Ke Technology Co., Ltd. Address before: 214000 Jiangsu New District of Wuxi, Taihu international science and Technology Parks Linghu Road No. 200 China Sensor Network International Innovation Park building E Patentee before: Jiangsu Ning Ke sensor Science and Technology Ltd. |
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Granted publication date: 20141029 Termination date: 20210507 |
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| CF01 | Termination of patent right due to non-payment of annual fee |