CN110618326A - Testing device for A320 air-conditioning system flow control valve - Google Patents
Testing device for A320 air-conditioning system flow control valve Download PDFInfo
- Publication number
- CN110618326A CN110618326A CN201910831774.1A CN201910831774A CN110618326A CN 110618326 A CN110618326 A CN 110618326A CN 201910831774 A CN201910831774 A CN 201910831774A CN 110618326 A CN110618326 A CN 110618326A
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- Prior art keywords
- power module
- voltage
- power
- current
- flow control
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/008—Testing of electric installations on transport means on air- or spacecraft, railway rolling stock or sea-going vessels
Abstract
The invention relates to a testing device of a flow control valve of an A320 air conditioning system, which comprises an ACDC power module for converting AC to DC, wherein the ACDC power module is connected with a DC28V power module, the DC28V power module is connected with a voltage meter head for monitoring the voltage of an electromagnetic valve and a current meter head for monitoring the current of the electromagnetic valve, the DC28V power module is connected with a DC5V power module for sampling the voltage of a Hall sensor, the DC28V power module is connected with a DC +/-15V power module, the DC +/-15V power module is connected with a constant current source for providing continuously variable testing current, and the DC +/-15V power module is also used for providing the power supply voltage of a pressure sensor. The invention integrates the power supply circuit, the test circuit and the line interface, greatly simplifies the test flow, reduces the line connection and improves the test efficiency.
Description
Technical Field
The invention relates to the field of testing of aircrafts, in particular to a testing device for a flow control valve of an A320 air conditioning system.
Background
The flow control valve is an important part on an aircraft air conditioning system and is used for controlling the air flow entering an air conditioning assembly to play a role in shutting down, and the air conditioning flow control valve is an important maintenance item when the aircraft is maintained and overhauled. The traditional detection process is manually operated, instruments such as an electromagnetic valve, a Hall sensor and a pressure sensor of the flow control valve are led out for power supply, the voltage and current states of the instruments are measured, the method is low in efficiency, a large number of wires, components, instruments and meters, a control device and the like need to be connected, uncertain test environment factors are easily generated, difference in test results is caused, and safety accidents are easily caused when testers work under the conditions of high temperature and high pressure.
Disclosure of Invention
The invention aims to provide a testing device for a flow control valve of an A320 air conditioning system, which improves the testing efficiency and the testing precision.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the utility model provides a testing arrangement of A320 air conditioning system flow control valve, is including the ACDC power module that is used for exchanging the direct current, ACDC power module is connected with DC28V power module, DC28V power module is connected with the current meter head that is used for the voltage gauge outfit of monitoring solenoid valve voltage and monitoring solenoid valve current, DC28V power module is connected with DC5V power module and is used for hall sensor's voltage sampling, DC28V power module is connected with DC 15V power module, DC 15V power module is connected with the constant current source and provides changeable test current in succession, DC 15V power module still is used for providing pressure sensor's supply voltage.
The voltage meter head and the current meter head are high-precision 5-bit meter heads, and one ends of the voltage meter head and the current meter head are respectively connected with a toggle switch for connecting a 28V power supply to the electromagnetic valve.
The constant current source is used for providing 0-300 mA's test current, including the potentiometre that is used for adjusting the electric current size, the one end of potentiometre is connected with +15V power, the potentiometre is kept away from the one end of +15V power is connected with first resistance after linking to each other with taking a percentage, first resistance is kept away from the one end of potentiometre is connected with-15V power, first resistance is kept away from the one end of-15V power is connected with the 3 feet that fortune was put, 1 foot that fortune was put is connected with the base that is connected with the MOS pipe behind the second resistance, the drain electrode of MOS pipe is connected with 15V power, the source electrode of MOS pipe is connected with the third resistance.
The third resistor comprises 5 pieces of 20 omega 2512 packaged low-temperature drift metal film resistors, and the 5 pieces of resistors are connected in parallel to form a 4 omega 3W overcurrent resistor.
The A-DPS end of the pressure sensor is connected with a 15V power supply, the B-DPS end of the pressure sensor is connected with a 10K third resistor and then grounded, and the B-DPS end of the pressure sensor is connected with a voltage gauge head to measure the output voltage of the pressure sensor.
The Hall sensor is connected with two voltage meter heads for voltage sampling.
The invention has the beneficial effects that:
1. practice thrift the manual work, improve production efficiency: the original test connection needs a large amount of wires, components, instruments/meters, control devices and the like, the connection process is complex, and labor is consumed;
2. the failure rate is low: the original test is not fixedly connected, the accuracy of the test result is poor due to different test conditions, all elements, equipment and the like are tested at present and fixed, and the test uncertainty caused by the environment is removed;
3. the operation is convenient: the original test needs to be tested, connected, controlled and monitored independently, the existing test device does not need to be connected, and the control and data acquisition are convenient;
4. the production risk is reduced: the former testing personnel need be at the job site, and the high pressure and the high temperature of environment can cause constructor injury, but present testing arrangement remote control, constructor can keep away from the scene and carry out the construction.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic diagram of the circuit of the present invention;
FIG. 3 is a power supply circuit diagram of the present invention;
FIG. 4 is a schematic diagram of a voltmeter according to the present invention;
FIG. 5 is a measurement circuit diagram of the present invention;
fig. 6 is a circuit diagram of a constant current source of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below.
In the task of testing the flow control valve of the A320 air-conditioning system, the key point is the measurement of the electromagnetic valve, the Hall sensor and the pressure sensor.
The structure block diagram shown in fig. 1:
the utility model provides a testing arrangement of A320 air conditioning system flow control valve, is including the ACDC power module that is used for exchanging the direct current, ACDC power module is connected with DC28V power module, DC28V power module is connected with the current meter head that is used for the voltage gauge outfit of monitoring solenoid valve voltage and monitoring solenoid valve current, DC28V power module is connected with DC5V power module and is used for hall sensor's voltage sampling, DC28V power module is connected with DC 15V power module, DC 15V power module is connected with the constant current source and provides changeable test current in succession, DC 15V power module still is used for providing pressure sensor's supply voltage.
The ACDC module converts 220V alternating current power supply into 48V direct current power supply to be output, and supplies power to the measured instrument and the measuring circuit.
The DC28V power module outputs 28V power to supply power for the solenoid valve, the solenoid valve is an important element for controlling the opening of the flow control valve, and the DC28V power module adopts an MP4560 voltage reduction chip to convert 48V direct current power into 28V direct current power.
The electromagnetic valve is connected with one path of voltage meter head to monitor voltage change of the electromagnetic valve, is connected with one path of current meter head to monitor current change of the electromagnetic valve, and is subjected to opening and closing test through the toggle switch.
As an embodiment of the invention, the circuit schematic shown in fig. 2 constitutes the overall circuit diagram of the invention.
The power supply circuit diagram shown in fig. 3:
the wiring terminal CON1 is connected with an ACDC power supply U2 to convert 220V alternating current into 48V direct current, the ACDC power supply U2 is connected with a DCDC chip U1 to convert 48V direct current into 28V direct current, 28V direct current is supplied to a tested electromagnetic valve through a switch S1 and a switch S2, and the DCDC chip U1 is connected with a DC +/-15V power supply module U3 to convert 28V power into +/-15V power.
Measurement circuit diagram as shown in fig. 5:
the DC +/-15V power supply module U3 is connected with a constant current source circuit consisting of a potentiometer RS1, an operational amplifier U14 and an MOS transistor Q1 and provides continuous and stable current of 0-300mA,
the voltage ammeter circuit shown in fig. 4:
the DC5V power supply module U4 supplies power to a first voltmeter U5, a second voltmeter U10, a third voltmeter U12, a fourth voltmeter U6, a fifth voltmeter U9, a sixth voltmeter U13, a first ammeter U7, a second ammeter U8 and a third ammeter U11.
Constant current source circuit diagram shown in fig. 6:
the constant current source is used for providing 0-300 mA's test current, including the potentiometre RS1 that is used for adjusting the electric current size, potentiometre RS 1's one end is connected with +15V power, potentiometre RS1 is kept away from be connected with first resistance R1 after the one end of +15V power links to each other with the tap, first resistance R1 is kept away from potentiometre RS 1's one end is connected with-15V power, first resistance R1 is kept away from the one end of-15V power is connected with the 3 feet of fortune amplifier U14, fortune amplifier U14's 1 foot is connected with second resistance R2 and is connected with MOS pipe Q1's base, MOS pipe Q1's drain is connected with the 15V power, MOS pipe's source is connected with third resistance R3.
In order to ensure that the maximum current of 300mA passes through, the third resistor R3 comprises 5 20 omega 2512 packaged low-temperature drift metal film resistors, and the 5 resistors are connected in parallel to form an overcurrent resistor of 4 omega 3W.
The constant current source adjusts the voltage of the same-phase input end of the operational amplifier through the potentiometer RS1, the voltage following adjustment is carried out through the reverse-phase input end of the operational amplifier, the output end of the operational amplifier outputs a voltage signal to control the base voltage of the MOS tube, the current within the range of 300mA can be continuously adjusted, and the precision is 1 mA.
Measurement circuit diagram as shown in fig. 5:
the A-DPS end of the pressure sensor is connected with a 15V power supply, the B-DPS end of the pressure sensor is connected with a 10K third resistor (R3) and then is grounded, the B-DPS end of the pressure sensor is connected with a voltage meter head to measure the output voltage of the pressure sensor, the output voltage of the pressure sensor is obtained through the voltage dividing resistor, and the voltage meter head displays the voltage reading.
And a signal output interface of the Hall sensor is connected to a voltage gauge head to display the working voltage of the voltage gauge head.
The potentiometer RS1 of voltage gauge outfit, current gauge outfit and regulation electric current all installs convenient operation and reading on the panel, and operating panel installs the line interface that is used for connecting each sensor, solenoid valve and 220V's power input interface simultaneously, has made things convenient for tester's line connection test greatly, has improved work efficiency.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a testing arrangement of A320 air conditioning system flow control valve, includes the ACDC power module that is used for exchanging the direct current, its characterized in that: the ACDC power module is connected with a DC28V power module, the DC28V power module is connected with a voltage gauge head for monitoring the voltage of the electromagnetic valve and a current gauge head for monitoring the current of the electromagnetic valve, the DC28V power module is connected with a DC5V power module for voltage sampling of the Hall sensor, the DC28V power module is connected with a DC +/-15V power module, the DC +/-15V power module is connected with a constant current source for providing continuously variable test current, and the DC +/-15V power module is also used for providing the power supply voltage of the pressure sensor.
2. The testing device of the flow control valve of the A320 air conditioning system as claimed in claim 1, wherein: the voltage meter head and the current meter head are high-precision 5-bit meter heads, and one ends of the voltage meter head and the current meter head are respectively connected with a toggle switch for connecting a 28V power supply to the electromagnetic valve.
3. The testing device of the flow control valve of the A320 air conditioning system as claimed in claim 1, wherein: the constant current source is used for providing 0-300 mA's test current, including potentiometre (RS1) that is used for adjusting the electric current size, the one end of potentiometre (RS1) is connected with +15V power, potentiometre (RS1) are kept away from be connected with first resistance (R1) after the one end of +15V power links to each other with the tap, first resistance (R1) are kept away from the one end of potentiometre (RS1) is connected with-15V power, first resistance (R1) are kept away from the one end of-15V power is connected with the 3 feet of fortune amplifying (U14), the 1 foot of fortune amplifying (U14) is connected with the base that is connected with MOS pipe (Q1) behind second resistance (R2), the drain electrode of MOS pipe (Q1) is connected with the 15V power, the source of MOS pipe is connected with third resistance (R3).
4. A testing device for a320 air conditioning system flow control valve according to claim 3, characterized in that: the third resistor (R3) comprises 5 20 omega 2512 packaged low temperature drift metal film resistors, and the 5 resistors are connected in parallel to form a 4 omega 3W overcurrent resistor.
5. The testing device of the flow control valve of the A320 air conditioning system as claimed in claim 1, wherein: the A-DPS end of the pressure sensor is connected with a 15V power supply, the B-DPS end of the pressure sensor is connected with a 10K third resistor (R3) and then is grounded, and the B-DPS end of the pressure sensor is connected with a voltage gauge head to measure the output voltage of the pressure sensor.
6. The testing device of the flow control valve of the A320 air conditioning system as claimed in claim 1, wherein: the Hall sensor is connected with two voltage meter heads for voltage sampling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910831774.1A CN110618326A (en) | 2019-09-04 | 2019-09-04 | Testing device for A320 air-conditioning system flow control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910831774.1A CN110618326A (en) | 2019-09-04 | 2019-09-04 | Testing device for A320 air-conditioning system flow control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110618326A true CN110618326A (en) | 2019-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910831774.1A Pending CN110618326A (en) | 2019-09-04 | 2019-09-04 | Testing device for A320 air-conditioning system flow control valve |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0692864A1 (en) * | 1994-07-12 | 1996-01-17 | Nippondenso Co., Ltd. | Drive circuit for a bidirectional flow control valve |
| CN205142065U (en) * | 2015-12-08 | 2016-04-06 | 四川奥特附件维修有限责任公司 | Flow control valve electrical control box |
| CN206114298U (en) * | 2016-10-26 | 2017-04-19 | 四川奥特附件维修有限责任公司 | Bleed valve control box |
| CN106768058A (en) * | 2016-12-30 | 2017-05-31 | 武汉泰安晶液态金属科技有限公司 | One kind shut-off valve test device |
| CN108163224A (en) * | 2017-11-28 | 2018-06-15 | 中国南方航空股份有限公司 | A kind of aircarrier aircraft air-conditioning flow control valve state monitoring device and method |
| CN208079468U (en) * | 2018-05-09 | 2018-11-09 | 淮阴师范学院 | The controlled constant-current source circuit of Linear Control |
| CN109765444A (en) * | 2019-01-22 | 2019-05-17 | 北京丰荣航空科技股份有限公司 | A kind of aircraft attachment electric loop integration test box and its test method |
| CN109813359A (en) * | 2019-01-14 | 2019-05-28 | 北京安达维尔机械维修技术有限公司 | A kind of exerciser and its control method for aviation flow control valve |
-
2019
- 2019-09-04 CN CN201910831774.1A patent/CN110618326A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0692864A1 (en) * | 1994-07-12 | 1996-01-17 | Nippondenso Co., Ltd. | Drive circuit for a bidirectional flow control valve |
| CN205142065U (en) * | 2015-12-08 | 2016-04-06 | 四川奥特附件维修有限责任公司 | Flow control valve electrical control box |
| CN206114298U (en) * | 2016-10-26 | 2017-04-19 | 四川奥特附件维修有限责任公司 | Bleed valve control box |
| CN106768058A (en) * | 2016-12-30 | 2017-05-31 | 武汉泰安晶液态金属科技有限公司 | One kind shut-off valve test device |
| CN108163224A (en) * | 2017-11-28 | 2018-06-15 | 中国南方航空股份有限公司 | A kind of aircarrier aircraft air-conditioning flow control valve state monitoring device and method |
| CN208079468U (en) * | 2018-05-09 | 2018-11-09 | 淮阴师范学院 | The controlled constant-current source circuit of Linear Control |
| CN109813359A (en) * | 2019-01-14 | 2019-05-28 | 北京安达维尔机械维修技术有限公司 | A kind of exerciser and its control method for aviation flow control valve |
| CN109765444A (en) * | 2019-01-22 | 2019-05-17 | 北京丰荣航空科技股份有限公司 | A kind of aircraft attachment electric loop integration test box and its test method |
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Application publication date: 20191227 |