CN113295939A - Vacuum pump electromagnetic compatibility test system and control method thereof - Google Patents
Vacuum pump electromagnetic compatibility test system and control method thereof Download PDFInfo
- Publication number
- CN113295939A CN113295939A CN202110333102.5A CN202110333102A CN113295939A CN 113295939 A CN113295939 A CN 113295939A CN 202110333102 A CN202110333102 A CN 202110333102A CN 113295939 A CN113295939 A CN 113295939A
- Authority
- CN
- China
- Prior art keywords
- vacuum pump
- vacuum
- darkroom
- electromagnetic compatibility
- pressure value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
-
- 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
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
Abstract
The invention discloses an electromagnetic compatibility testing system of an automobile vacuum pump and a control method thereof, belonging to the technical field of electronic electromagnetic compatibility testing of automobiles. The invention provides a vacuum pump electromagnetic compatibility test system and a control method thereof. The problem of the vacuum pump in the electromagnetic emission frequency sweep test process, reach certain atmospheric pressure value and can't continue the test result breakpoint that the work leads to promptly is solved, through barometer real time control atmospheric pressure value in the atmospheric pressure jar, guarantee that the vacuum pump is in operating condition continuously, not because of the atmospheric pressure value automatic shutdown work too high.
Description
Technical Field
The invention discloses an electromagnetic compatibility testing system of an automobile vacuum pump and a control method thereof, and belongs to the technical field of electronic electromagnetic compatibility testing of automobiles.
Background
With the continuous development of automobile electronic and electrical technology, automobiles are used as preferred vehicles for more and more people to go out, and the stability and safety of electronic parts of the automobiles during running have higher and higher requirements. The automobile is driven by the motion of the engine to form a vacuum environment, so that the brake boosting system of the automobile is assisted to provide a boosting effect. The brake system is used as the most basic function in the automobile operation safety system, and the parts in the system must be ensured not to cause intolerable interference to other automobile electronic components in the operation process, and meanwhile, the normal and stable function can be ensured when the parts are subjected to electromagnetic interference from other automobile electronic components or the external environment, and the function must be within the error range acceptable by the operation requirement of the automobile brake system. Therefore, the electromagnetic compatibility test of the vacuum pump system is very important, and the running stability of the vacuum pump system can be improved through the electromagnetic compatibility test, so that the running safety of the whole vehicle is improved.
Problems with the current electromagnetic compatibility testing for vacuum pump systems:
the vacuum pump does not belong to automobile electronic parts working for a long time in actual operation, when the pressure in the vacuum tank reaches a certain value, the vacuum pump stops working, the vacuum pump is a short-time disturbance source part specified in an electromagnetic compatibility test, and the limit value of an electromagnetic emission type project can be properly relaxed in the electromagnetic compatibility test.
In actual tests, whether a vacuum pump system normally works or not is judged by monitoring the working current and voltage of the vacuum pump mostly, when electromagnetic emission tests are carried out, the vacuum pump stops working after reaching a certain air pressure value, and the test result of a part of frequency bands is the state that the vacuum pump is electrified but does not work, so that the test result is discontinuous, and the failure is really the electromagnetic emission energy of the vacuum pump continuously working in different frequency bands.
Disclosure of Invention
The invention aims to solve the problem that a vacuum pump cannot continuously work and further cannot continuously test electromagnetic emission energy in a full frequency band under the working state of the vacuum pump, and provides a vacuum pump electromagnetic compatibility test system and a vacuum pump electromagnetic compatibility test method.
The invention aims to solve the problems and is realized by the following technical scheme:
the utility model provides a vacuum pump electromagnetic compatibility test system, includes interconnect's vacuum pump and vacuum tank, vacuum tank links to each other with the cylinder, be provided with the barometer on the cylinder is connected the trachea with vacuum tank, the vacuum pump is connected with the power electricity, vacuum pump, vacuum tank, barometer and power all set up in the darkroom, the cylinder sets up outside the darkroom, be provided with the receiver outside the darkroom, the controller detects vacuum pump operating condition data through setting up at the inside detection antenna in darkroom.
Preferably, the vacuum pump is connected to a power supply via an artificial network.
Preferably, the vacuum pump is disposed on a heat sink.
Preferably, a mechanical ammeter is also included, which is electrically connected to the vacuum pump.
Preferably, still include interior light couple, outer light couple and digital multimeter setting are outside at the darkroom, interior light couple sets up inside the darkroom, digital multimeter, outer light couple and interior light couple are connected with the vacuum pump electricity in proper order.
Preferably, the vacuum pump is electrically connected to a temperature sensor inside the darkroom, and the temperature sensor is electrically connected to a temperature tester outside the darkroom.
Preferably, a blower is arranged outside the darkroom, and the blower blows air into the darkroom through an air blowing pipe to dissipate heat of a motor of the vacuum pump.
A control method of a vacuum pump electromagnetic compatibility test system comprises the following steps:
step S1, filling air in the vacuum tank, providing a normal-pressure non-vacuum environment to record the air pressure value P0;
step S2, starting the vacuum pump to pump air out of the vacuum tank to form vacuum assistance, and recording the critical air pressure value as P1 when the vacuum pump stops working because the air pressure in the vacuum tank reaches a certain value;
step S3, turning on an external cylinder switch of the darkroom, adjusting the air pressure value to recover to P0, and enabling the vacuum pump to recover to work;
step S4, repeating steps S1-S3, keeping the air pressure value of the vacuum tank between P0 and P1 by adjusting the air cylinder switch, ensuring the vacuum pump to work continuously, and completing the working state data of the vacuum pump in the relevant frequency band by the control machine by replacing the receiving frequency of the detection antenna;
and step S5, judging whether the vacuum pump electromagnetic experiment is qualified or not according to the vacuum pump working state data.
Preferably, when the control machine is a frequency spectrum receiver, the vacuum pump working state data is a vacuum pump electromagnetic emission value, and when the vacuum pump electromagnetic emission value is lower than a design limit requirement, the vacuum pump electromagnetic emission test is qualified.
Preferably, when the control machine is a signal source and a power amplifier, the working state data of the vacuum pump is numerical values of a digital multimeter and a mechanical ammeter, and the numerical values of the digital multimeter and the mechanical ammeter are within an allowable fluctuation range, the vacuum pump electromagnetic immunity test is qualified.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a vacuum pump electromagnetic compatibility test system and a control method thereof. The problem of the vacuum pump in the electromagnetic emission frequency sweep test process, reach certain atmospheric pressure value and can't continue the test result breakpoint that the work leads to promptly is solved, through barometer real time control atmospheric pressure value in the atmospheric pressure jar, guarantee that the vacuum pump is in operating condition continuously, not because of the atmospheric pressure value automatic shutdown work too high.
Drawings
FIG. 1 is a block diagram of the electrical connections of the present invention.
Detailed Description
The invention is further illustrated below with reference to the accompanying drawing 1:
the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a first embodiment of the present invention provides a vacuum pump electromagnetic compatibility testing system based on the prior art, which is characterized by comprising: a vacuum pump, a vacuum tank, a barometer, a power supply, a cylinder, a receiver and a dark room, the connection of which will be described in detail below.
Vacuum pump, vacuum tank, barometer and power all set up in the darkroom, the cylinder sets up outside the darkroom, and the vacuum pump is fixed on the cooling pad, and the vacuum pump passes through artifical internet access with the power and supplies power to it, vacuum pump and vacuum tank interconnect, and the vacuum tank links to each other with the cylinder, installs the barometer on the trachea of being connected of cylinder and vacuum tank, and the receiver is installed outside the darkroom, and the controller detects vacuum pump operating condition data through installing at the inside detection antenna in darkroom
In order to monitor the working current change of the vacuum pump in real time, the present embodiment further includes a mechanical ammeter, which is connected to the current monitoring node by using a voltage dividing resistor and is output from the power supply line of the vacuum pump.
In order to monitor the working voltage change of the vacuum pump in real time, the vacuum pump further comprises an inner thermocouple, an outer thermocouple and a digital multimeter, wherein the outer thermocouple and the digital multimeter are arranged outside the darkroom, and the outer thermocouple realizes the conversion from an optical fiber signal to a voltage signal. The inner optical coupler is arranged inside the darkroom, the voltage signal of the vacuum pump is converted into an optical fiber signal and transmitted to the outside of the darkroom through the inner optical coupler, and the digital multimeter, the outer optical coupler and the inner optical coupler are sequentially and electrically connected with the vacuum pump.
In order to monitor the working temperature change of the vacuum pump in real time, the vacuum pump further comprises a temperature sensor, the vacuum pump is electrically connected with the temperature sensor inside the darkroom, and the temperature sensor is electrically connected with a temperature tester outside the darkroom.
The air blowing pipe is fixed near the motor of the vacuum pump, the blower is arranged outside the darkroom, and the blower blows air into the darkroom through the air blowing pipe to dissipate heat of the motor of the vacuum pump.
A control method of a vacuum pump electromagnetic compatibility test system comprises the following specific contents:
step S1, filling air in the vacuum tank, providing a normal-pressure non-vacuum environment to record the air pressure value P0;
step S2, starting the vacuum pump to pump air out of the vacuum tank to form vacuum assistance, and recording the critical air pressure value as P1 when the vacuum pump stops working because the air pressure in the vacuum tank reaches a certain value;
step S3, turning on an external cylinder switch of the darkroom, adjusting the air pressure value to recover to P0, and enabling the vacuum pump to recover to work;
step S4, repeating steps S1-S3, keeping the air pressure value of the vacuum tank between P0 and P1 by adjusting the cylinder switch, ensuring the vacuum pump to work continuously, completing the working state data of the vacuum pump in the relevant frequency band by the control machine by replacing the receiving frequency of the detection antenna,
when the control machine is a frequency spectrum receiver, the working state data of the vacuum pump is the electromagnetic emission value of the vacuum pump, the electromagnetic emission test of the vacuum pump in the relevant frequency band is completed by replacing the receiving antenna with a rod antenna (0.1-30MHz), a biconical antenna (30-200MHz), a logarithmic antenna (200-1000MHz) and a horn antenna (1000-2500 MHz), and the electromagnetic emission test of the vacuum pump is qualified when the electromagnetic emission value of the vacuum pump is lower than the design limit requirement according to the electromagnetic emission value received by the antenna.
In the second embodiment, when the control machine is a signal source and a power amplifier, the working state data of the vacuum pump is the numerical values of a digital multimeter and a mechanical ammeter, so that the air pressure in the vacuum tank is kept between P0 and P1, the vacuum pump is ensured to work continuously, the electromagnetic interference resistance test in the relevant frequency band is completed by replacing a transmitting antenna in the darkroom to be a logarithmic antenna (80-1000MHz) and a horn antenna (1000 plus 6000MHz), in the process, the working state performance of the vacuum pump is judged according to the numerical values of the digital multimeter and the mechanical ammeter outside the darkroom, and the electromagnetic interference resistance test of the vacuum pump is qualified in an allowable fluctuation range.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a vacuum pump electromagnetic compatibility test system, its characterized in that, includes interconnect's vacuum pump and vacuum tank, vacuum tank links to each other with the cylinder, be provided with the barometer on the cylinder is connected the trachea with vacuum tank, the vacuum pump is connected with the power electricity, vacuum pump, vacuum tank, barometer and power all set up in the darkroom, the cylinder sets up outside the darkroom, the darkroom is provided with the receiver outward, the controller detects vacuum pump operating condition data through setting up at the inside detection antenna in darkroom.
2. A vacuum pump electromagnetic compatibility testing system according to claim 1 wherein said vacuum pump is connected to a power supply via a manual network.
3. A vacuum pump emc testing system according to claim 1 or 2, wherein the vacuum pump is disposed on a heat sink.
4. A vacuum pump electromagnetic compatibility testing system according to claim 3, further comprising a mechanical ammeter electrically connected to the vacuum pump.
5. A vacuum pump electromagnetic compatibility test system according to claim 4, further comprising an inner thermocouple, an outer thermocouple and a digital multimeter, wherein the outer thermocouple and the digital multimeter are disposed outside the darkroom, the inner thermocouple is disposed inside the darkroom, and the digital multimeter, the outer thermocouple and the inner thermocouple are sequentially and electrically connected to the vacuum pump.
6. A vacuum pump electromagnetic compatibility test system according to claim 4 or 5, characterized in that said vacuum pump is electrically connected with a temperature sensor inside the darkroom, said temperature sensor is electrically connected with a temperature tester outside the darkroom.
7. A vacuum pump electromagnetic compatibility test system according to claim 6, characterized in that a blower is arranged outside the dark room, and the blower blows air into the dark room through an air blowing pipe to dissipate heat of a motor of the vacuum pump.
8. A control method of a vacuum pump electromagnetic compatibility test system is characterized by comprising the following steps:
step S1, filling air in the vacuum tank, providing a normal-pressure non-vacuum environment to record the air pressure value P0;
step S2, starting the vacuum pump to pump air out of the vacuum tank to form vacuum assistance, and recording the critical air pressure value as P1 when the vacuum pump stops working because the air pressure in the vacuum tank reaches a certain value;
step S3, turning on an external cylinder switch of the darkroom, adjusting the air pressure value to recover to P0, and enabling the vacuum pump to recover to work;
step S4, repeating steps S1-S3, keeping the air pressure value of the vacuum tank between P0 and P1 by adjusting the air cylinder switch, ensuring the vacuum pump to work continuously, and completing the working state data of the vacuum pump in the relevant frequency band by the control machine by replacing the receiving frequency of the detection antenna;
and step S5, judging whether the vacuum pump electromagnetic experiment is qualified or not according to the vacuum pump working state data.
9. The method as claimed in claim 8, wherein the vacuum pump operating status data is a vacuum pump electromagnetic emission value when the controller is a spectrum receiver, and the vacuum pump electromagnetic emission test is qualified when the vacuum pump electromagnetic emission value is lower than a design limit requirement.
10. The method as claimed in claim 8, wherein when the control machine is a signal source and a power amplifier, the operating status data of the vacuum pump is values of a digital multimeter and a mechanical ammeter, and the values of the digital multimeter and the mechanical ammeter are within an allowable fluctuation range, the electromagnetic immunity test of the vacuum pump is qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110333102.5A CN113295939B (en) | 2021-03-29 | 2021-03-29 | Vacuum pump electromagnetic compatibility test system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110333102.5A CN113295939B (en) | 2021-03-29 | 2021-03-29 | Vacuum pump electromagnetic compatibility test system and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113295939A true CN113295939A (en) | 2021-08-24 |
| CN113295939B CN113295939B (en) | 2023-01-31 |
Family
ID=77319269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110333102.5A Active CN113295939B (en) | 2021-03-29 | 2021-03-29 | Vacuum pump electromagnetic compatibility test system and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113295939B (en) |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000079464A (en) * | 1998-06-22 | 2000-03-21 | Cooper Ind Inc | Portable electric solder removing tool |
| US20030054067A1 (en) * | 2001-09-20 | 2003-03-20 | Asm Technology Singapore Pte Ltd | Pellet feeding system for a moulding machine |
| CN101776533A (en) * | 2010-02-11 | 2010-07-14 | 深圳市陆地方舟电动车有限公司 | Debugging detection device of vacuum pressure switch |
| DE102010049138A1 (en) * | 2010-10-22 | 2012-04-26 | Ksb Aktiengesellschaft | Device for pump monitoring |
| CN102518580A (en) * | 2011-11-23 | 2012-06-27 | 奇瑞汽车股份有限公司 | Endurance test stand and endurance test method for vacuum pump |
| CN202368564U (en) * | 2011-12-19 | 2012-08-08 | 东风汽车股份有限公司 | Electric vacuum pump control device for automobile |
| CN104007347A (en) * | 2014-05-29 | 2014-08-27 | 中国科学院高能物理研究所 | Vacuum low-temperature radiosensitivity electromagnetic compatibility experimentation method, system and testing device |
| CN104502116A (en) * | 2014-09-18 | 2015-04-08 | 浙江万向精工有限公司 | Hydraulic simulation test apparatus and system, and test method |
| CN104535868A (en) * | 2015-01-09 | 2015-04-22 | 中国人民解放军军械工程学院 | Electrostatic discharge test device under electromagnetic pulse radiation environment |
| CN104635054A (en) * | 2015-02-11 | 2015-05-20 | 华北电力大学 | Closed-type temperature control solid medium electrical resistivity measurement device |
| CN105620453A (en) * | 2014-11-05 | 2016-06-01 | 鼎佳（天津）汽车电子有限公司 | Automobile ABS system and electromagnetic interference detecting method thereof |
| CN106194702A (en) * | 2016-10-09 | 2016-12-07 | 吉林大学 | New-energy automobile electric vacuum pump test systems test bed |
| CN206158987U (en) * | 2016-10-28 | 2017-05-10 | 安徽江淮汽车集团股份有限公司 | Vacuum pump performance testing system |
| CN206496877U (en) * | 2017-03-02 | 2017-09-15 | 艾迪康科技（苏州）有限公司 | automatic vacuum test device |
| CN109357887A (en) * | 2018-09-29 | 2019-02-19 | 奇瑞商用车（安徽）有限公司 | A kind of the engine bench test device and its application method of the braking of simulated automotive plateau |
| CN209231424U (en) * | 2018-09-04 | 2019-08-09 | 智车优行科技（上海）有限公司 | The device of electromagnetic compatibility testing is carried out to the parts to be tested |
| CN110206720A (en) * | 2019-05-09 | 2019-09-06 | 中国第一汽车股份有限公司 | A kind of electric car electric vacuum pump durability test apparatus and test method |
| CN210775821U (en) * | 2019-08-27 | 2020-06-16 | 一汽奔腾轿车有限公司 | Signal generator for verifying automotive electronics electromagnetic compatibility test site |
| CN212289792U (en) * | 2020-06-05 | 2021-01-05 | 北京新能源汽车股份有限公司 | Vacuum pump system and electric automobile |
-
2021
- 2021-03-29 CN CN202110333102.5A patent/CN113295939B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000079464A (en) * | 1998-06-22 | 2000-03-21 | Cooper Ind Inc | Portable electric solder removing tool |
| US20030054067A1 (en) * | 2001-09-20 | 2003-03-20 | Asm Technology Singapore Pte Ltd | Pellet feeding system for a moulding machine |
| CN101776533A (en) * | 2010-02-11 | 2010-07-14 | 深圳市陆地方舟电动车有限公司 | Debugging detection device of vacuum pressure switch |
| DE102010049138A1 (en) * | 2010-10-22 | 2012-04-26 | Ksb Aktiengesellschaft | Device for pump monitoring |
| CN102518580A (en) * | 2011-11-23 | 2012-06-27 | 奇瑞汽车股份有限公司 | Endurance test stand and endurance test method for vacuum pump |
| CN202368564U (en) * | 2011-12-19 | 2012-08-08 | 东风汽车股份有限公司 | Electric vacuum pump control device for automobile |
| CN104007347A (en) * | 2014-05-29 | 2014-08-27 | 中国科学院高能物理研究所 | Vacuum low-temperature radiosensitivity electromagnetic compatibility experimentation method, system and testing device |
| CN104502116A (en) * | 2014-09-18 | 2015-04-08 | 浙江万向精工有限公司 | Hydraulic simulation test apparatus and system, and test method |
| CN105620453A (en) * | 2014-11-05 | 2016-06-01 | 鼎佳（天津）汽车电子有限公司 | Automobile ABS system and electromagnetic interference detecting method thereof |
| CN104535868A (en) * | 2015-01-09 | 2015-04-22 | 中国人民解放军军械工程学院 | Electrostatic discharge test device under electromagnetic pulse radiation environment |
| CN104635054A (en) * | 2015-02-11 | 2015-05-20 | 华北电力大学 | Closed-type temperature control solid medium electrical resistivity measurement device |
| CN106194702A (en) * | 2016-10-09 | 2016-12-07 | 吉林大学 | New-energy automobile electric vacuum pump test systems test bed |
| CN206158987U (en) * | 2016-10-28 | 2017-05-10 | 安徽江淮汽车集团股份有限公司 | Vacuum pump performance testing system |
| CN206496877U (en) * | 2017-03-02 | 2017-09-15 | 艾迪康科技（苏州）有限公司 | automatic vacuum test device |
| CN209231424U (en) * | 2018-09-04 | 2019-08-09 | 智车优行科技（上海）有限公司 | The device of electromagnetic compatibility testing is carried out to the parts to be tested |
| CN109357887A (en) * | 2018-09-29 | 2019-02-19 | 奇瑞商用车（安徽）有限公司 | A kind of the engine bench test device and its application method of the braking of simulated automotive plateau |
| CN110206720A (en) * | 2019-05-09 | 2019-09-06 | 中国第一汽车股份有限公司 | A kind of electric car electric vacuum pump durability test apparatus and test method |
| CN210775821U (en) * | 2019-08-27 | 2020-06-16 | 一汽奔腾轿车有限公司 | Signal generator for verifying automotive electronics electromagnetic compatibility test site |
| CN212289792U (en) * | 2020-06-05 | 2021-01-05 | 北京新能源汽车股份有限公司 | Vacuum pump system and electric automobile |
Non-Patent Citations (1)
| Title |
|---|
| 卢铁英: "电动真空泵的试验研究", 《汽车零部件》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113295939B (en) | 2023-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113594562B (en) | Battery cell, battery module, battery pack and electric automobile | |
| CN111722155A (en) | Cable joint fault monitoring system and monitoring method | |
| CN105698959A (en) | Dry-type air-core reactor overheating fault early warning system based on TVOC and temperature test | |
| CN105978485A (en) | Method and system for online detection of photovoltaic modules | |
| CN104932395B (en) | Solar photovoltaic assembly monitors the intelligent maintenance device and maintaining method of system | |
| CN113295939B (en) | Vacuum pump electromagnetic compatibility test system and control method thereof | |
| CN106597346A (en) | Electronic current transformer laser energy supply self-diagnosis method and system thereof | |
| CN112710937A (en) | System and method for monitoring capacitor bank running state | |
| CN112198866A (en) | Method for simulating shutdown time | |
| CN110702255A (en) | Built-in high-voltage cable joint temperature measuring device | |
| CN113219269A (en) | Electromagnetic compatibility testing system and method for high-voltage PTC heating system of electric vehicle | |
| CN106781411B (en) | M-Bus double-host grid connection method, communication interface converter and M-Bus double-host control system | |
| CN213986735U (en) | System for digital circuit fault diagnosis | |
| CN212366601U (en) | Power equipment high temperature early warning cooling device | |
| CN107415698A (en) | Vehicle circuit running state monitoring method | |
| CN209247873U (en) | A kind of Iddq testing system based on car networking | |
| CN211045335U (en) | Gas density relay with contact state monitoring function and monitoring system | |
| CN208126192U (en) | A kind of controller for electric vehicle full-automatic test system | |
| CN220273685U (en) | Detector for bus network equipment signals | |
| CN209447056U (en) | A kind of electrical equipment temperature rise monitoring system | |
| CN218003543U (en) | Alarm circuit of analyzer | |
| CN214797075U (en) | Intelligent dry-type transformer | |
| CN113092903A (en) | Vehicle-mounted charging assembly electromagnetic compatibility test system and control method thereof | |
| CN115064793B (en) | Battery replacing device, battery module and battery replacing method | |
| CN217276572U (en) | Temperature detection device for dry-type air-core reactor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |