CN2560934Y - Oxygen leakage detector - Google Patents
Oxygen leakage detector Download PDFInfo
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- CN2560934Y CN2560934Y CN 02278636 CN02278636U CN2560934Y CN 2560934 Y CN2560934 Y CN 2560934Y CN 02278636 CN02278636 CN 02278636 CN 02278636 U CN02278636 U CN 02278636U CN 2560934 Y CN2560934 Y CN 2560934Y
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 32
- 239000001301 oxygen Substances 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 36
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- 230000009977 dual effect Effects 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 230000009466 transformation Effects 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model relates to an oxygen leakage detector that uses when being arranged in relevant oxygen systems such as air force, navy, civil aviation, industry, medical treatment to leak oxygen detection, by vary voltage rectifier circuit, charging device, the group battery, automatic transfer circuit, pump suction, the sensor, reference voltage provides the circuit, I-U converting circuit, the signal is than enlarged processing circuit, show warning circuit interconnect and constitute, it is extensive to have the adaptation, easy and simple to handle, sensitivity is high, strong adaptability, the high advantage of reliability, the difficult problem that oxygen leakage detected has effectively been solved, the blank in this aspect has been filled abroad.
Description
Technical field
The utility model relates to the leakage oxygen detection that uses when a kind of leakage oxygen that is used for relevant oxygen systems such as air force, naval, civil aviaton, industry, medical treatment detects.
Background technology
The oxygen system of aircraft is one of visual plant of aircraft.Jeopardize " two disconnected one stop " of flight safety, one of them is exactly disconnected oxygen.Oxygen leakage is the main cause of disconnected oxygen, will cause aberdeen cutlet as untimely finding.Same problem exists too at submarine and diving apparatus, and the untimely oxygen leakage of finding causes disconnected oxygen will cause very big threat to frogman's life.The oxygen supply equipment of hospital leaks oxygen also can cause very large economy loss to hospital.Therefore in time check out that the leakage oxygen position of various device is very necessary.But up to the present, the unique method that check to leak oxygen is to be coated with soap bubble, this method not only slowly but also numerous, and contaminated equipment, especially winter, soap was non-foaming, brought great difficulty for inspection work.Therefore, check that leaking oxygen is a great problem that perplexs numerous maintenance personals for a long time.The particularly current Central Military Commission has proposed to win the requirement of the local war under the high-tech condition, has set up emergent combat troop, requires aircraft, submarine to set out fast, and this difficult problem becomes more important.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art and a kind of easy and simple to handle, highly sensitive, adaptability is strong, reliability is high leakage oxygen detection is provided.
The purpose of this utility model is achieved in that by transformation rectification circuit, charging device, electric battery, automatic switching circuit, pump suction, sensor, reference voltage provides circuit, I-U translation circuit, signal comparison amplification treatment circuit, display alarm circuit to interconnect and form, wherein:
(1), transformation rectified current routing transformer, silicon bridge D1～D4, D6～D10, filter capacitor C1～C6,7815 three terminal regulator IC1 form,
(2), charging device by IC2, IC4 (LM339, voltage comparator), resistance (R1～R16), potentiometer (W1～W4), triode (BG1, BG3), luminotron (LED1～LED4) form,
(3), electric battery by two the joint 9 volts of rechargeable batteries form,
(4), automatic switching circuit is made up of charging circuit and relay (J1, J2), spark-extinguishing diode (D5, D11), triode (BG2, BG4),
(5), pump is inhaled and is made up of flexible pipe, air pump, gauge tap.
(6), sensor is a SPE type lambda sensor.
(7), (C7～C11), resistance (R17, R29, R30, R20), pot W5 form for reference voltage power supply route IC5 (7805, three terminal regulator), IC6 (7660, integrated regulator), IC7 (TL431, integrated regulator), electric capacity.
(8), the I-U translation circuit is made up of IC12 (ICL7650, integrated amplifier), IC13, IC14 (TL062, dual comparator), resistance R 28, capacitor C 18.
(9), signal comparison, amplification, treatment circuit are by IC8, IC9 (LM339, voltage comparator), IC10, IC11 (TL062, dual comparator), the resistance (electric capacity (C12～C19) form of R18～R26).
(10), display is 4 half word voltage tables (liquid crystal)
(11), alarm part is made up of triode (BG5), buzzer (THD), luminotron LED5 resistance R 18.
The utility model has solved and has leaked the difficult problem that oxygen detects, and has filled up domestic and international in the blank aspect this, has following advantage:
1. scalable: the leakage oxygen that this instrument is adapted to relevant oxygen systems such as air force, naval, civil aviaton, industry, medical treatment detects.
2. easy and simple to handle: can directly measure Lou oxygen position, AC/DC charges automatically, easy to carry.
3. highly sensitive: as can to determine to leak the oxygen position fast.
4. adaptability is strong: be not subjected to factor affecting such as environment temperature, humidity, air pressure substantially.
5. reliability height: this instrument is on probation in different occasions, functional through 4 years.
Description of drawings
Fig. 1 is a block scheme of the present utility model.
Fig. 2 is a circuit diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model provides circuit, I-U translation circuit, signal comparison amplification treatment circuit, display alarm circuit to interconnect and form by transformation rectification circuit, charging device, electric battery, automatic switching circuit, pump suction, sensor, reference voltage, wherein:
(1), transformation rectified current routing transformer, silicon bridge D1～D4, D6～D10, filter capacitor C1～C6,7815 three terminal regulator IC1 form,
(2), charging device by IC2, IC4 (LM339, voltage comparator), resistance (R1～R16), potentiometer (W1～W4), triode (BG1, BG3), luminotron (LED1～LED4) form,
(3), electric battery by two the joint 9 volts of rechargeable batteries form,
(4), automatic switching circuit is made up of charging circuit and relay (J1, J2), spark-extinguishing diode (D5, D11), triode (BG2, BG4),
(5), pump is inhaled and is made up of flexible pipe, air pump, gauge tap.
(6), sensor is a SPE type lambda sensor.
(7), (C7～C11), resistance (R17, R29, R30, R20), pot W5 form for reference voltage power supply route IC5 (7805, three terminal regulator), IC6 (7660, integrated regulator), IC7 (TL431, integrated regulator), electric capacity.
(8), the I-U translation circuit is made up of IC12 (ICL7650, integrated amplifier), IC13, IC14 (TL062, dual comparator), resistance R 28, capacitor C 18.
(9), signal comparison, amplification, treatment circuit are by IC8, IC9 (LM339, voltage comparator), IC10, IC11 (TL062, dual comparator), the resistance (electric capacity (C12～C19) form of R18～R26).
(10), display is 4 half word voltage tables (liquid crystal)
(11), alarm part is made up of triode (BG5), buzzer (THD), luminotron LED5 resistance R 18.
As shown in Figure 2, in circuit diagram of the present utility model, primary connects the 220V50HZ alternating current, secondary is double winding, winding N1 meets silicon bridge D1～D4, silicon bridge just, the indirect capacitor C 1 of negative pole, 1 of C2 and IC1 (7815), 2 ends, capacitor C 3 is connected to 3 ends of IC1 and the negative pole of D1～D4, resistance R 1, pot W1, R2 is connected to 3 ends of IC1 and 5 ends of IC2, resistance R 1, R3, W1, luminotron LED1 is connected to 3 ends of IC1 and the negative pole of D1～D4,3 ends of the 3 termination IC1 of IC2, the negative pole of 12 termination D1～D4 of IC2, be connected to resistance R 5 between 3 ends of IC2 and 2 ends, be connected to resistance R 7 between 2 ends of IC2 and the base stage of triode BG1, and be connected to resistance R 8 between the base stage of triode BG2,3 ends of IC2 and the inter-collector of BG1 are connected to resistance R 6, pot W2, be connected to the control coil of relay J 1 with the inter-collector of BG2, diode D5 and this coil also connect, the emitter one tunnel of BG2 connects the negative pole of D1～D4, another road connects 1 end of J1, the emitter of BG1 is connected to luminotron LED2, the negative electrode one tunnel of LED2 joins through 4 ends of resistance R 4 with IC2, another road is connected to 3 ends of J1, winding N2 meets silicon bridge D6～D10, silicon bridge D6～D10 minus earth, silicon bridge just, the indirect capacitor C 4 of negative pole, 1 of C5 and IC3 (7815), 2 ends, capacitor C 6 is connected to 3 ends of IC3 and the negative pole of D6～D10, be connected to resistance R 9 between 3 ends of IC3 and 7 ends of LM339 voltage comparator ic 4, R10, potentiometer W3, be connected to resistance R 9 between 3 ends of IC3 and ground, R11, potentiometer W3 and luminotron LED3,3 ends of IC4 and 3 ends of IC3 join, the 12 end ground connection of IC4, be connected to resistance R 13 between 3 ends of IC4 and 1 end of IC4,3 ends of IC4 and the inter-collector of triode BG3 are connected to resistance R 14, potentiometer W4, be connected to the control coil of relay J 2 with the inter-collector of triode BG4, diode D11 and this coils from parallel connection of coils, be connected to resistance R 15 between 1 end of IC4 and the base stage of BG3, be connected to resistance R 16 between 1 end of IC4 and BG4, the anode of the emitter sending and receiving light pipe LED4 of triode BG3, its negative electrode one tunnel is connected to 6 ends of IC4 through resistance R 12,1 end of electrical equipment J2 is succeeded on another road, emitter-base bandgap grading one tunnel ground connection of triode BG4, another road connects 3 ends of J2, the 2 ends while of relay J 1 and the negative pole of battery E1, the negative pole of gauge outfit links to each other with the negative pole of electric pump, 4 ends of J1 link to each other with 6 ends and are connected to the positive pole of battery E1,5 ends of J1 and the positive pole of electric pump, the positive pole of gauge outfit links to each other, 2 ends of relay J 2 link to each other with the negative pole of battery E2 and link to each other with 8 ends of J2,4 of J2,6 ends link to each other and are connected to the negative pole of E2,5 ends of J2 link to each other with the negative pole of D6～D10,7 ends one tunnel of J2 are through luminotron LED5, hummer THD connects the collector of triode BG5, the grounded emitter of BG5, another road connects 1 end of IC5 (7805), the 2 end ground connection of IC5, the 3 termination IC6 (7660 of IC5, integrated regulator) 8 ends, simultaneously with IC13 (TL062, dual comparator) 8 ends, IC12 (7650, integrated amplifier) 11 ends, 8 ends of IC11 (TL062) link to each other, be connected to capacitor C 7 between 3 ends of IC5 and ground, C8,2 of IC6, be connected to capacitor C 9 between 4 ends, 5 ends of IC6 be connected to capacitor C 10, and with 4 ends of IC13,7 ends of IC12,4 ends of IC11 link to each other.Be connected to resistance R 17 between 1 end of TL431 voltage stabilizer IC7 and 8 ends of IC6, the 2 end ground connection of IC7, be connected to capacitor C 11 between 3 ends and ground, 3 ends one tunnel of IC7 join through 5 ends of resistance R 29 with IC14 (TL062), another road is through resistance R 20, potentiometer W5 ground connection, be connected to resistance R 30 between 5 ends of IC14 and ground, capacitor C 19, the C end of 7 termination lambda sensors, 6 ends link to each other 1 of IC13 with 1 end of IC13,2 ends link to each other, 3 termination sensor R end, 4 ends of IC12 (7650) link to each other with the W of sensor end, be connected to resistance R 28 between 4 ends and 1 end, capacitor C 18,5 end ground connection are connected to resistance R 26 between 2 ends of IC11 and 1 end of IC12,3 ends are through resistance R 27 ground connection, be connected to resistance R 25 between 2 ends and 1 end, be connected to potentiometer W6 between capacitor C 17,1 ends and ground.6,7 ends of IC10 (TL062) link to each other, and the movable end that is connected to capacitor C 16,5 ends and potentiometer W6 between 5 ends and ground joins, and 7 ends are connected to resistance R through capacitor C 15 ground connection between 5 ends of IC9 (LM339, voltage comparator) and 7 ends of IC10
24, end is through resistance R
23Ground connection is connected to resistance R between 5 ends and 2 ends
2211 ends of IC8 (LM339) are through resistance R
21Join with 2 ends of IC9, through capacitor C
14Join with ground, 10 ends are through capacitor C
13Join 10 ends and potentiometer W with ground
5Movable end link to each other, 13 ends are through resistance R
19, K switch
2Connect 3 ends of IC5,13 terminating diode D
12Anode, D
12Negative electrode one tunnel through C
12Ground connection, another road is through resistance R
18Connect the base stage of BG5.
The output current of SPE-I type lambda sensor is directly proportional with tested oxygen concentration.This electric current amplified and be converted to voltage, compare with reference voltage after this voltage amplification, when amplifier output voltage is higher than reference voltage, show that tested oxygen concentration is higher than airborne oxygen level under the normal condition, comparer output positive signal, this signal is input display after amplifying, handling, and shows tested oxygen concentration, drives alarm device simultaneously and sends sound, light alarm.
Claims (2)
1, a kind of leakage oxygen detection, it is characterized in that: provide circuit, I-U translation circuit, signal comparison amplification treatment circuit, display alarm circuit to interconnect and form by transformation rectification circuit, charging device, electric battery, automatic switching circuit, pump suction, sensor, reference voltage, wherein:
(1), transformation rectified current routing transformer, silicon bridge D1～D4, D6～D10, filter capacitor C1～C6,7815 three terminal regulator IC1 form,
(2), charging device by IC2, IC4 (LM339, voltage comparator), resistance (R1～R16), potentiometer (W1～W4), triode (BG1, BG3), luminotron (LED1～LED4) form,
(3), electric battery by two the joint 9 volts of rechargeable batteries form,
(4), automatic switching circuit is made up of charging circuit and relay (J1, J2), spark-extinguishing diode (D5, D11), triode (BG2, BG4),
(5), pump inhales and to be made up of flexible pipe, air pump, gauge tap,
(6), sensor is SPE type lambda sensor,
(7), reference voltage power supply route IC5 (7805, three terminal regulator), IC6 (7660, integrated regulator), IC7 (TL431, integrated regulator), electric capacity (C7～C11), resistance (R17, R29, R30, R20), pot W5 form,
(8), the I-U translation circuit is made up of IC12 (ICL7650, integrated amplifier), IC13, IC14 (TL062, dual comparator), resistance R 28, capacitor C 18,
(9), signal comparison, amplification, treatment circuit by IC8, IC9 (LM339, voltage comparator), IC10, IC11 (TL062, dual comparator), resistance (electric capacity of R18～R26) (C12～C19) form,
(10), display is 4 half word voltage tables (liquid crystal),
(11), alarm part is made up of triode (BG5), buzzer (THD), luminotron LED5 resistance R 18.
2, a kind of leakage oxygen detection according to claim 1, it is characterized in that: primary connects the 220V50HZ alternating current, secondary is double winding, winding N1 meets silicon bridge D1～D4, silicon bridge just, the indirect capacitor C 1 of negative pole, 1 of C2 and IC1 (7815), 2 ends, capacitor C 3 is connected to 3 ends of IC1 and the negative pole of D1～D4, resistance R 1, pot W1, R2 is connected to 3 ends of IC1 and 5 ends of IC2, resistance R 1, R3, W1, luminotron LED1 is connected to 3 ends of IC1 and the negative pole of D1～D4,3 ends of the 3 termination IC1 of IC2, the negative pole of 12 termination D1～D4 of IC2, be connected to resistance R 5 between 3 ends of IC2 and 2 ends, be connected to resistance R 7 between 2 ends of IC2 and the base stage of triode BG1, and be connected to resistance R 8 between the base stage of triode BG2,3 ends of IC2 and the inter-collector of BG1 are connected to resistance R 6, pot W2, be connected to the control coil of relay J 1 with the inter-collector of BG2, diode D5 and this coil also connect, the emitter one tunnel of BG2 connects the negative pole of D1～D4, another road connects 1 end of J1, the emitter of BG1 is connected to luminotron LED2, the negative electrode one tunnel of LED2 joins through 4 ends of resistance R 4 with IC2, another road is connected to 3 ends of J1, winding N2 meets silicon bridge D6～D10, silicon bridge D6～D10 minus earth, silicon bridge just, the indirect capacitor C 4 of negative pole, 1 of C5 and IC3 (7815), 2 ends, capacitor C 6 is connected to 3 ends of IC3 and the negative pole of D6～D10, be connected to resistance R 9 between 3 ends of IC3 and 7 ends of LM339 voltage comparator ic 4, R10, potentiometer W3, be connected to resistance R 9 between 3 ends of IC3 and ground, R11, potentiometer W3 and luminotron LED3,3 ends of IC4 and 3 ends of IC3 join, the 12 end ground connection of IC4, be connected to resistance R 13 between 3 ends of IC4 and 1 end of IC4,3 ends of IC4 and the inter-collector of triode BG3 are connected to resistance R 14, potentiometer W4, be connected to the control coil of relay J 2 with the inter-collector of triode BG4, diode D11 and this coils from parallel connection of coils, be connected to resistance R 15 between 1 end of IC4 and the base stage of BG3, be connected to resistance R 16 between 1 end of IC4 and BG4, the anode of the emitter sending and receiving light pipe LED4 of triode BG3, its negative electrode one tunnel is connected to 6 ends of IC4 through resistance R 12,1 end of electrical equipment J2 is succeeded on another road, emitter-base bandgap grading one tunnel ground connection of triode BG4, another road connects 3 ends of J2, the 2 ends while of relay J 1 and the negative pole of battery E1, the negative pole of gauge outfit links to each other with the negative pole of electric pump, 4 ends of J1 link to each other with 6 ends and are connected to the positive pole of battery E1,5 ends of J1 and the positive pole of electric pump, the positive pole of gauge outfit links to each other, 2 ends of relay J 2 link to each other with the negative pole of battery E2 and link to each other with 8 ends of J2,4 of J2,6 ends link to each other and are connected to the negative pole of E2,5 ends of J2 link to each other with the negative pole of D6～D10,7 ends one tunnel of J2 are through luminotron LED5, hummer THD connects the collector of triode BG5, the grounded emitter of BG5, another road connects 1 end of IC5 (7805), the 2 end ground connection of IC5, the 3 termination IC6 (7660 of IC5, integrated regulator) 8 ends, simultaneously with IC13 (TL062, dual comparator) 8 ends, IC12 (7650, integrated amplifier) 11 ends, 8 ends of IC11 (TL062) link to each other, be connected to capacitor C 7 between 3 ends of IC5 and ground, C8,2 of IC6, be connected to capacitor C 9 between 4 ends, 5 ends of IC6 be connected to capacitor C 10, and with 4 ends of IC13,7 ends of IC12,4 ends of IC11 link to each other.Be connected to resistance R 17 between 1 end of TL431 voltage stabilizer IC7 and 8 ends of IC6, the 2 end ground connection of IC7, be connected to capacitor C 11 between 3 ends and ground, 3 ends one tunnel of IC7 join through 5 ends of resistance R 29 with IC14 (TL062), another road is through resistance R 20, potentiometer W5 ground connection, be connected to resistance R 30 between 5 ends of IC14 and ground, capacitor C 19, the C end of 7 termination lambda sensors, 6 ends link to each other 1 of IC13 with 1 end of IC13,2 ends link to each other, 3 termination sensor R end, 4 ends of IC12 (7650) link to each other with the W of sensor end, be connected to resistance R 28 between 4 ends and 1 end, capacitor C 18,5 end ground connection are connected to resistance R 26 between 2 ends of IC11 and 1 end of IC12,3 ends are through resistance R 27 ground connection, be connected to resistance R 25 between 2 ends and 1 end, be connected to potentiometer W6 between capacitor C 17,1 ends and ground.6,7 ends of IC10 (TL062) link to each other, and the movable end that is connected to capacitor C 16,5 ends and potentiometer W6 between 5 ends and ground joins, and 7 ends are connected to resistance R through capacitor C 15 ground connection between 5 ends of IC9 (LM339, voltage comparator) and 7 ends of IC10
24, 4 ends are through resistance R
23Ground connection is connected to resistance R between 5 ends and 2 ends
2211 ends of IC8 (LM339) are through resistance R
21Join with 2 ends of IC9, through capacitor C
14Join with ground, 10 ends are through capacitor C
13Join 10 ends and potentiometer W with ground
5Movable end link to each other, 13 ends are through resistance R
19, K switch
2Connect 3 ends of IC5,13 terminating diode D
12Anode, D
12Negative electrode one tunnel through C
12Ground connection, another road is through resistance R
18Connect the base stage of BG5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02278636 CN2560934Y (en) | 2002-08-02 | 2002-08-02 | Oxygen leakage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02278636 CN2560934Y (en) | 2002-08-02 | 2002-08-02 | Oxygen leakage detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2560934Y true CN2560934Y (en) | 2003-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02278636 Expired - Fee Related CN2560934Y (en) | 2002-08-02 | 2002-08-02 | Oxygen leakage detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2560934Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048101A (en) * | 2011-10-11 | 2013-04-17 | 技迩科学株式会社 | Gas leak detector |
| CN107884146A (en) * | 2016-09-30 | 2018-04-06 | 江苏核电有限公司 | A kind of equipment medium leak detecting device |
| CN111721480A (en) * | 2020-06-29 | 2020-09-29 | 南京航空航天大学 | Civil aircraft unit oxygen system leakage early warning method based on flight data |
-
2002
- 2002-08-02 CN CN 02278636 patent/CN2560934Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048101A (en) * | 2011-10-11 | 2013-04-17 | 技迩科学株式会社 | Gas leak detector |
| CN103048101B (en) * | 2011-10-11 | 2016-06-29 | 技迩科学株式会社 | Gas leakdetector |
| CN107884146A (en) * | 2016-09-30 | 2018-04-06 | 江苏核电有限公司 | A kind of equipment medium leak detecting device |
| CN107884146B (en) * | 2016-09-30 | 2024-05-14 | 江苏核电有限公司 | Equipment medium leakage detection device |
| CN111721480A (en) * | 2020-06-29 | 2020-09-29 | 南京航空航天大学 | Civil aircraft unit oxygen system leakage early warning method based on flight data |
| CN111721480B (en) * | 2020-06-29 | 2021-07-20 | 南京航空航天大学 | Civil aircraft unit oxygen system leakage early warning method based on flight data |
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| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |