CN112228376A

CN112228376A - Fan noise testing device

Info

Publication number: CN112228376A
Application number: CN202011065737.3A
Authority: CN
Inventors: 刘子龙; 许效祥; 康明勇; 郑冬红; 邵飞
Original assignee: Intelligent Automation Equipment Zhuhai Co Ltd
Current assignee: Intelligent Automation Equipment Zhuhai Co Ltd; Intelligent Automation Zhuhai Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-01-15

Abstract

The invention provides a fan noise testing device which realizes automation and has higher testing precision and testing efficiency. The fan signal acquisition device comprises an upper computer (1), a fan signal acquisition module, a fan control board (2), a driving device and a shielding box (3) for shielding noise, wherein the fan signal acquisition module is integrated on the fan control board (2), a fan jig is arranged in the shielding box (3), a fan (4) to be detected is fixed on the fan jig, the fan jig is arranged on an XY-axis rotating table (5), the XY-axis rotating table (5) is driven by the driving device to do reciprocating rotation motion on an X axis and a Y axis, the driving device is in electric signal connection with the upper computer (1), one end of the fan signal acquisition module is connected with the upper computer (1), the other end of the fan signal acquisition module acquires a noise signal of the fan (4) to be detected, one end of the fan control board (2) is connected with the upper computer (1), and the other end of the fan control board is. The invention can be applied to the field of noise test.

Description

Fan noise testing device

Technical Field

The invention relates to the field of measurement, in particular to a fan noise testing device.

Background

At present, the fan noise test generally utilizes a manual test, and an operator holds the fan to swing and then places the fan at the ear to hear. The mode of completely depending on hearing perception to judge not only has slow measuring speed, but also easily causes personnel fatigue and causes the outflow of defective products. The test is carried out by an original manual method, and the test cost is high. In addition, the prior art does not record test data in real time and requires an operator to separately record the test data. Meanwhile, the manual swing angle of an operator is uncertain, the swing speed is uncontrollable, and the distance between the tested fan and the ear is uncontrollable.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a fan noise testing device which realizes automation and has higher testing precision and testing efficiency.

The technical scheme includes that the fan signal acquisition device comprises an upper computer, a fan signal acquisition module, a fan control panel, a driving device and a shielding box for shielding noise, wherein the fan signal acquisition module is integrated on the fan control panel, a fan jig is arranged in the shielding box, a fan to be detected is fixed on the fan jig, the fan jig is arranged on an XY-axis rotating table, the XY-axis rotating table is driven by the driving device to do reciprocating rotation motion on an X axis and a Y axis, the driving device is in signal connection with the upper computer, one end of the fan signal acquisition module is connected with the upper computer, the other end of the fan signal acquisition module acquires a noise signal of the fan to be detected, one end of the fan control panel is connected with the upper computer, and the other end of the fan control panel is in electrical signal connection with the fan to be.

Further, fan signal acquisition module including set up perpendicularly in the microphone that awaits measuring fan top, integrated in first signal amplifier and sound card treater on the fan control panel, the noise signal of fan that awaits measuring is gathered to the microphone, passes through first signal amplifier enlargies, inputs after sound card treater processing again on the host computer.

Still further, the fan control panel includes data acquisition card, MCU and the first power IC to the fan power supply that awaits measuring, MCU respectively with the fan that awaits measuring reaches data acquisition card signal connection, data acquisition card with host computer signal connection, first power IC is to the fan power supply that awaits measuring be provided with sampling resistor and switch on first power IC's the circuit, sampling resistor's both ends are connected with the ADC, the output of ADC with data acquisition card connects, data acquisition card still with XY axle revolving stage and fan signal connection that awaits measuring.

More specifically, a second power supply IC is further disposed on the fan control board, and the second power supply IC supplies power to the MCU alone.

Furthermore, the driving device comprises a motor and a PLC (programmable logic controller), the output end of the motor is connected with the X-axis and the Y-axis of the XY-axis rotating table, and the motor is connected with the upper computer through the PLC.

Furthermore, a signal adapter plate is arranged on the shielding box, the signal adapter plate is in signal connection with the fan to be tested and the XY-axis rotating table respectively, and the outer end of the signal adapter plate is in signal connection with the data acquisition card.

And a reserved communication port is also arranged on the fan control panel, the reserved communication port is electrically connected with the data acquisition card, and the reserved communication port is provided with an independent third power supply IC for power supply.

The first power supply IC, the second power supply IC and the third power supply IC are all connected with a peripheral power supply through connectors.

The invention has the beneficial effects that: according to the invention, the shielding box is arranged to isolate external noise, compared with the prior art that the fan needs to be detected in a mute room, the requirement on the environment is greatly reduced, the shielding box can be moved randomly according to the requirement, and the test cost and the requirement are relatively reduced; in addition, the driving device is adopted to drive the XY-axis rotating table arranged in the shielding box, and the driving device is automatically controlled by the upper computer, so that the rotation angle of the fan to be tested can be more accurately controlled on the concentricity of the X axis and the Y axis, the distance between the fan to be tested and the microphone can be more accurately positioned, data acquisition is more facilitated, noise signals can be accurately acquired, and the testing precision is greatly improved; in addition, the XY-axis rotating table can drive the fan to be tested to swing at any angle according to the test requirements, so that the swing angle of the fan to be tested can be controlled, and can be adjusted to any angle at any time according to the requirements, the whole test process is more standard and has traceability, higher test precision and reliability are ensured, the uncertainty of a test result caused by the introduction of manual factors is avoided, and the automation degree is improved; in addition, the improvement of the automation degree also reduces the error test caused by fatigue of personnel, uncertain swinging motion tracks of the personnel and incapability of well controlling the concentricity; the standard automatic call testing process greatly shortens the time required by testing and greatly improves the testing efficiency.

Drawings

FIG. 1 is a functional block diagram of the present invention;

fig. 2 is a more detailed system block diagram of the present invention.

Detailed Description

The specific principle of the present invention is as follows.

As shown in fig. 1 and 2, the fan signal acquisition module is integrated on the fan control board 2, a fan fixture is arranged in the shielding box 3, a fan 4 to be tested is fixed on the fan fixture, the fan fixture is arranged on an XY-axis rotating table 5, and the fan fixture is replaceable and can be replaced according to fans with different sizes and specifications, so that the fan signal acquisition module has better adaptability. The XY-axis rotating table 5 is driven by the driving device to do reciprocating rotation motion on an X axis and a Y axis, the driving device is in electrical signal connection with the upper computer 1, one end of the fan signal acquisition module is connected with the upper computer 1, the other end of the fan signal acquisition module acquires a noise signal of the fan 4 to be detected, one end of the fan control panel 2 is connected with the upper computer 1, and the other end of the fan control panel is in electrical signal connection with the fan 4 to be detected. The driving device comprises a motor 16 and a PLC (programmable logic controller) 17, the output end of the motor is connected with the X-axis and the Y-axis of the XY-axis rotating table 5, and the motor 16 is connected with the upper computer 1 through the PLC 17. The XY-axis rotating table 5 has accurate rotation angle and speed control through the motor and the PLC, and the testing precision of the invention is improved. The rotation angles of the X axis and the Y axis of the XY axis rotating platform can be independent respectively, can act continuously to meet the swing test requirement of an operator, and can be processed and output independently when signal acquisition is carried out. Of course, the motor can be replaced by an air cylinder, and the air cylinder can be selectively arranged according to different precision requirements.

Fan signal acquisition module including set up perpendicularly in the microphone 6 of 4 tops of fan that await measuring, integrated in first signal amplifier 7 and sound card treater 8 on the fan control panel 2, the noise signal of fan 4 that await measuring is gathered to microphone 6, passes through first signal amplifier 7 enlargies, inputs after the sound card treater 8 is handled again on host computer 1. The microphone is always vertically positioned above the fan to be tested, the distance between the microphone and the fan to be tested is controllable, the problem that the testing precision is not high or even retest is needed due to the fact that the distance between the fan to be tested and a fan signal acquisition module (namely the microphone) is uncertain can be solved, and the testing precision is greatly improved.

The fan control panel 2 includes data acquisition card 9, MCU10 and to the first power IC11 of the fan 4 power supply that awaits measuring, MCU10 respectively with the fan that awaits measuring reaches data acquisition card 9 signal connection, data acquisition card 9 with host computer 1 signal connection, first power IC11 is to the fan power supply that awaits measuring be provided with sampling resistor 12 and switch 13 on first power IC 11's the circuit, the both ends of sampling resistor 12 are connected with ADC14, ADC 14's output with data acquisition card 9 is connected, data acquisition card 9 still with XY revolving stage 5 and the fan 4 signal connection that awaits measuring. The current and the voltage value of the fan to be tested can be monitored in real time through the collecting resistor, the voltage value can be measured in real time through the ADC, and then the current of the load is calculated according to the formula of I = U/R. After current and voltage signals are obtained, the current and voltage signals are uploaded to the upper computer through a data acquisition card, and the electrical performance index of the fan is tested. A second power IC15 is further disposed on the fan control board 2, and the MCU10 is individually powered by the second power IC 15. The independent first power supply IC and the independent second power supply IC are arranged, so that the working voltage between each part is not influenced by each other, the power supply precision of each part is further guaranteed, and the test efficiency of the whole device is further improved. The shielding box 3 is provided with a signal adapter plate 18, the signal adapter plate 18 is respectively in signal connection with the fan to be detected and the XY-axis rotating platform 5, and the outer end of the signal adapter plate 18 is in signal connection with the data acquisition card 9. Through the arrangement of the signal adapter plate, signals in the shielding box are concentrated on the signal adapter plate and then output to each peripheral part, so that the layout in the shielding box is simplified, and the signal processing capacity and the signal processing precision in the shielding box are improved. A reserved communication port 19 is further formed in the fan control panel 2, the reserved communication port 19 is in electrical signal connection with the data acquisition card 9, and the reserved communication port 19 is provided with an independent third power supply IC20 for supplying power. The communication port is reserved, and guarantee can be provided for subsequent further expansion of the device. The first power IC11, the second power IC15, and the third power IC20 are all connected to peripheral power sources through a connector 21. The form that the internal independent power supply is respectively controlled improves the precision and the reliability of the power supply of each part, thereby ensuring that the test precision of the whole equipment is higher.

In the invention, the first signal amplifier is selected from amplifiers with model numbers of BK 1704-C-102; the type of the sound card processor 8 is RME Fireface UCX; the data acquisition card is an existing integrated board; the model of the MCU is SMT32F103ZET 6; the chip model of the first power supply IC is TPS5430 DDA; the ADC is selected from an amplifier with the model number of AD 7175; the chip model of the second power supply IC is LMR10515 YMF; the PLC controller is selected from CKD; the chip model of the third power supply IC is ADM7171 ARDZ.

The invention can more accurately control the rotation angle of the fan on the concentricity of an X axis and a Y axis and more accurately position the distance between the test fan and the microphone for data acquisition, thereby accurately acquiring noise signals, being easy to replace manual operation by automation, being capable of identifying noise which is not easily identified by human ears above high frequency 12KHz and reducing error test caused by fatigue of personnel and incapability of well controlling concentricity due to personnel swing.

The invention can solve the difference of noise judgment caused by artificial hearing difference and simultaneously can reduce the influence of the noise of the test environment on the test result. After the fan noise test technology is adopted, the tested fan test noise data is reliably and stably acquired, and misjudgment caused by hearing fatigue is avoided. The invention ensures the traceability of the whole test process by improving the automation degree.

Claims

1. The utility model provides a fan noise testing arrangement which characterized in that: it comprises an upper computer (1), a fan signal acquisition module, a fan control panel (2), a driving device and a shielding box (3) for shielding noise, wherein the fan signal acquisition module is integrated on the fan control panel (2), a fan fixture is arranged in the shielding box (3), a fan (4) to be tested is fixed on the fan fixture, the fan jig is arranged on an XY-axis rotating table (5), the XY-axis rotating table (5) is driven by the driving device to do reciprocating rotation motion on an X axis and a Y axis, the driving device is in electric signal connection with the upper computer (1), one end of the fan signal acquisition module is connected with the upper computer (1), the other end of the fan signal acquisition module acquires a noise signal of the fan (4) to be detected, one end of the fan control panel (2) is connected with the upper computer (1), and the other end of the fan control panel is connected with an electric signal of the fan (4) to be tested.

2. The fan noise test apparatus according to claim 1, wherein: fan signal acquisition module including set up perpendicularly in microphone (6) of waiting to measure fan (4) top, integrated in first signal amplifier (7) and sound card treater (8) on fan control panel (2), the noise signal of waiting to measure fan (4) is gathered in microphone (6), process first signal amplifier (7) are enlargied, process again through sound card treater (8) and handle the back input and arrive on host computer (1).

3. The fan noise test apparatus according to claim 1, wherein: fan control panel (2) include data acquisition card (9), MCU (10) and to the first power IC (11) of waiting to detect fan (4) power supply, MCU (10) reach with waiting to detect the fan respectively data acquisition card (9) signal connection, data acquisition card (9) with host computer (1) signal connection, first power IC (11) are to waiting to detect the fan power supply be provided with sampling resistor (12) and switch (13) on the circuit of first power IC (11), the both ends of sampling resistor (12) are connected with ADC (14), the output of ADC (14) with data acquisition card (9) are connected, data acquisition card (9) still with XY revolving stage (5) and fan (4) signal connection that awaits measuring.

4. A fan noise testing device according to claim 3, wherein: and a second power supply IC (15) is also arranged on the fan control board (2), and the second power supply IC (15) supplies power to the MCU (10) independently.

5. The fan noise test apparatus according to claim 1, wherein: the driving device comprises a motor (16) and a PLC (programmable logic controller) (17), the output end of the motor is connected with the X-axis and the Y-axis of the XY-axis rotating table (5), and the motor (16) is connected with the upper computer (1) through the PLC (17).

6. A fan noise testing device according to claim 3, wherein: the shielding box (3) is provided with a signal adapter plate (18), the signal adapter plate (18) is in signal connection with the fan to be detected and the XY-axis rotating table (5) respectively, and the outer end of the signal adapter plate (18) is in signal connection with the data acquisition card (9).

7. The fan noise test apparatus according to claim 4, wherein: the fan control panel (2) is further provided with a reserved communication port (19), the reserved communication port (19) is in electrical signal connection with the data acquisition card (9), and the reserved communication port (19) is provided with an independent third power supply IC (20) for supplying power.

8. The fan noise test apparatus according to claim 7, wherein: the first power supply IC (11), the second power supply IC (15) and the third power supply IC (20) are all connected with a peripheral power supply through connectors (21).