CN207976257U - A kind of motor compressor air-tightness non-destructive testing device - Google Patents
A kind of motor compressor air-tightness non-destructive testing device Download PDFInfo
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- CN207976257U CN207976257U CN201820456935.4U CN201820456935U CN207976257U CN 207976257 U CN207976257 U CN 207976257U CN 201820456935 U CN201820456935 U CN 201820456935U CN 207976257 U CN207976257 U CN 207976257U
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- carbon dioxide
- dioxide gas
- motor compressor
- dependent sensor
- destructive testing
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- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
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Abstract
The utility model discloses a kind of motor compressor air-tightness non-destructive testing devices, including carbon dioxide gas dependent sensor, closed pressurized container, dsp processor and host computer；It is equipped with the motor compressor of built-in drive in closed pressurized container, carbon dioxide gas dependent sensor is equipped in driver；Dsp processor is connected with carbon dioxide gas dependent sensor, host computer respectively by connection；The utility model motor compressor air-tightness non-destructive testing device acquires signal by carbon dioxide gas dependent sensor and is transmitted to dsp processor, dsp processor is transmitted to after judging whether qualification according to the signal of acquisition in host computer, can conveniently detect the air-tightness of motor compressor；Carbon dioxide gas dependent sensor uses level-one impedance inverter circuit module, and carbon dioxide gas dependent sensor output impedance is made to be reduced to commonly measurable rank；And temperature compensation module is used, enhance the measurement accuracy of carbon dioxide gas dependent sensor so that reliability higher.
Description
Technical field
The utility model is related to motor compressor technical field, especially a kind of motor compressor air-tightness non-destructive testing dress
It sets.
Background technology
Currently, the development of electric vehicle obtains the encouragement energetically and promotion of national governments due to its environmentally protective concept,
But the air-conditioning of electric vehicle and orthodox car uses different principle and control mode, therefore the air-conditioning of electric vehicle is using new
Mentality of designing and technique；Current design all uses frequency conversion DC driven, and driver is embedded into motor compressor
Face because driver needs moistureproof and waterproof, therefore proposes the air-tightness of electric compressor certain requirement, so entire industry is urgent
Need whether a kind of mode of non-destructive testing, detection motor compressor seal in place.
Utility model content
The purpose of this utility model is to provide a kind of motor compressor gas simple in structure, easy to use, good reliability
Close property non-destructive testing device.
Realize that the technical solution of the utility model aim is：
A kind of motor compressor air-tightness non-destructive testing device, which is characterized in that including carbon dioxide gas dependent sensor, close
Close pressurizing vessel, dsp processor and host computer；The electric compressor for being internally provided with built-in drive of the closed pressurized container
Machine, driver are internally provided with carbon dioxide gas dependent sensor；The dsp processor by connection respectively with carbon dioxide
Gas sensor, host computer are connected.
Preferably, the carbon dioxide gas dependent sensor includes gas sensor, level-one impedance inverter circuit module, temperature benefit
Repay module and power supply；The level-one impedance inverter circuit module includes operational amplifier, second resistance, 3rd resistor and capacitance；
The temperature compensation module includes thermistor and first resistor；The power supply respectively with heating pole one end of gas sensor, heat
One end of quick resistance is connected, the heating pole other end ground connection of gas sensor, the other end of thermistor respectively with first resistor
One end, the first output end be connected, the other end of first resistor ground connection；Detection pole one end and the operation of the gas sensor are put
The in-phase input end of big device is connected, the detection pole other end ground connection of gas sensor；The reverse input end of the operational amplifier
Be connected respectively with one end of one end of second resistance, 3rd resistor, the other end of second resistance ground connection, 3rd resistor it is another
End is connected with one end of the output end of operational amplifier, second output terminal, capacitance respectively, the other end ground connection of capacitance.
Preferably, the operational amplifier uses CA3140 high input impedance operational amplifiers.
The utility model compared with prior art, remarkable advantage：
（1）The utility model motor compressor air-tightness non-destructive testing device is acquired by carbon dioxide gas dependent sensor to be believed
Number and be transmitted to dsp processor, dsp processor is transmitted to after judging whether qualification according to the signal of acquisition in host computer, can be with
Conveniently detect the air-tightness of motor compressor.
（2）Carbon dioxide gas dependent sensor uses level-one in the utility model motor compressor air-tightness non-destructive testing device
Impedance inverter circuit module makes carbon dioxide gas dependent sensor output impedance be reduced to commonly measurable rank；And use temperature
Compensating module enhances the measurement accuracy of carbon dioxide gas dependent sensor so that reliability higher.
Description of the drawings
Fig. 1 is the structure of carbon dioxide gas dependent sensor in the utility model motor compressor air-tightness non-destructive testing device
Schematic diagram.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1：
A kind of motor compressor air-tightness non-destructive testing device, including carbon dioxide gas dependent sensor, closed pressurized container,
Dsp processor and host computer；The motor compressor for being internally provided with built-in drive of the closed pressurized container, driver
It is internally provided with carbon dioxide gas dependent sensor；The dsp processor by connection respectively with carbon dioxide gas dependent sensor,
Host computer is connected；The utility model motor compressor air-tightness non-destructive testing device is acquired by carbon dioxide gas dependent sensor
Signal is simultaneously transmitted to dsp processor, and dsp processor is transmitted to after judging whether qualification according to the signal of acquisition in host computer, can
Conveniently to detect the air-tightness of motor compressor.
As shown in Figure 1, the carbon dioxide gas dependent sensor includes gas sensor, level-one impedance inverter circuit module, temperature
Spend compensating module and power supply；The level-one impedance inverter circuit module includes operational amplifier U, second resistance R2,3rd resistor
R3 and capacitance C；The temperature compensation module includes thermistor RT and first resistor R1；The power supply VCC respectively with gas sensitive element
Heating pole one end of part, one end of thermistor RT are connected, the heating pole other end ground connection of gas sensor, thermistor RT's
The other end is connected with one end of first resistor R1, the first output terminals A respectively, the other end ground connection of first resistor R1；The gas
Detection pole one end of quick element is connected with the in-phase input end of operational amplifier U, the detection pole other end ground connection of gas sensor；
The reverse input end of the operational amplifier U is connected with one end of one end of second resistance R2,3rd resistor R3 respectively, and second
The other end of resistance R2 is grounded, the other end of 3rd resistor R3 respectively with the output end of operational amplifier U, second output terminal B, electricity
The one end for holding C is connected, the other end ground connection of capacitance C, wherein, cannot since the output impedance of gas sensor is very high
Its output signal directly is measured with common voltmeter or multimeter, so the termination level-one impedance transformation after gas sensor output
Circuit so that gas sensor output impedance is reduced to commonly measurable rank, and impedance transform operation amplifier must be selected high defeated
Enter impedance type, the operational amplifier U uses CA3140 high input impedance operational amplifiers；Due to carbon dioxide gas dependent sensor
Interior nuclear temperature can reach 500 degree or more when normal work, and kernel and surrounding air are in direct contact, therefore environment temperature
The sensitivity of sensor is influenced whether when variation, so using temperature compensation module, enhances carbon dioxide gas dependent sensor
Measurement accuracy so that reliability higher；If temperature-compensating can be not added with by not being very high occasion for measurement accuracy requirement.
A kind of detection method of motor compressor air-tightness non-destructive testing device, includes the following steps：
Step 1：A carbon dioxide gas dependent sensor is arranged in internal drive；
Step 2：The motor compressor of built-in drive is placed into closed pressurized container, in closed pressurized container
Portion pours into the carbon dioxide of certain pressure, it is ensured that carbon dioxide gas dependent sensor heated time is more than 3 minutes；
Step 3：The signal of acquisition is transmitted to dsp processor by carbon dioxide gas dependent sensor by connection, at DSP
Reason device can be transmitted to the related data of acquisition in host computer by connection；When the dioxy of carbon dioxide gas dependent sensor acquisition
When changing concentration of carbon higher than setting threshold values, dsp processor generates alarm signal and is transmitted in host computer；When carbon dioxide gas sensor senses
When the gas concentration lwevel of device acquisition is not higher than setting threshold values, dsp processor generates qualifying signal and is transmitted in host computer；It is i.e. complete
At the air-tightness of detection motor compressor.
In conclusion the utility model motor compressor air-tightness non-destructive testing device passes through carbon dioxide gas dependent sensor
Acquisition signal is simultaneously transmitted to dsp processor, and dsp processor is transmitted to host computer after judging whether qualification according to the signal of acquisition
In, it can conveniently detect the air-tightness of motor compressor；The utility model motor compressor air-tightness non-destructive testing fills
It sets middle carbon dioxide gas dependent sensor and uses level-one impedance inverter circuit module, carbon dioxide gas dependent sensor output impedance is made to drop
Rank is can measure as low as common；And temperature compensation module is used, enhance the measurement accuracy of carbon dioxide gas dependent sensor so that
Reliability higher.
Claims (3)
1. a kind of motor compressor air-tightness non-destructive testing device, which is characterized in that including carbon dioxide gas dependent sensor, closed
Pressurizing vessel, dsp processor and host computer；The electric compressor for being internally provided with built-in drive of the closed pressurized container
Machine, driver are internally provided with carbon dioxide gas dependent sensor；The dsp processor by connection respectively with carbon dioxide
Gas sensor, host computer are connected.
2. motor compressor air-tightness non-destructive testing device according to claim 1, which is characterized in that the carbon dioxide
Gas sensor includes gas sensor, level-one impedance inverter circuit module, temperature compensation module and power supply；The level-one impedance becomes
It includes operational amplifier to change circuit module（U）, second resistance（R2）, 3rd resistor（R3）And capacitance（C）；The temperature-compensating mould
Block includes thermistor（RT）And first resistor（R1）；The power supply（VCC）Respectively with heating pole one end of gas sensor, temperature-sensitive
Resistance（RT）One end be connected, the heating pole other end ground connection of gas sensor, thermistor（RT）The other end respectively with
One resistance（R1）One end, the first output end（A）It is connected, first resistor（R1）The other end ground connection；The gas sensor
Detect pole one end and operational amplifier（U）In-phase input end be connected, the detection pole other end ground connection of gas sensor；The fortune
Calculate amplifier（U）Reverse input end respectively with second resistance（R2）One end, 3rd resistor（R3）One end be connected, second
Resistance（R2）The other end ground connection, 3rd resistor（R3）The other end respectively with operational amplifier（U）Output end, second output
End（B）, capacitance（C）One end be connected, capacitance（C）The other end ground connection.
3. motor compressor air-tightness non-destructive testing device according to claim 2, which is characterized in that the operation amplifier
Device（U）Using CA3140 high input impedance operational amplifiers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820456935.4U CN207976257U (en) | 2018-04-03 | 2018-04-03 | A kind of motor compressor air-tightness non-destructive testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820456935.4U CN207976257U (en) | 2018-04-03 | 2018-04-03 | A kind of motor compressor air-tightness non-destructive testing device |
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| Publication Number | Publication Date |
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| CN207976257U true CN207976257U (en) | 2018-10-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204881A (en) * | 2018-04-03 | 2018-06-26 | 苏州瑞驱电动科技有限公司 | A kind of motor compressor air-tightness non-destructive testing device and its detection method |
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2018
- 2018-04-03 CN CN201820456935.4U patent/CN207976257U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204881A (en) * | 2018-04-03 | 2018-06-26 | 苏州瑞驱电动科技有限公司 | A kind of motor compressor air-tightness non-destructive testing device and its detection method |
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