CN115657594B - Data acquisition system and acquisition method - Google Patents
Data acquisition system and acquisition method Download PDFInfo
- Publication number
- CN115657594B CN115657594B CN202211660845.4A CN202211660845A CN115657594B CN 115657594 B CN115657594 B CN 115657594B CN 202211660845 A CN202211660845 A CN 202211660845A CN 115657594 B CN115657594 B CN 115657594B
- Authority
- CN
- China
- Prior art keywords
- data
- test
- data acquisition
- processing center
- industrial personal
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses a data acquisition system and a data acquisition method, which relate to the technical field of transmission test benches and comprise a data processing center, wherein the data processing center is in communication connection with a plurality of data acquisition modules, each data acquisition module corresponds to one test bench, and the data acquisition module is used for acquiring original test data of the test bench; the data processing center is also in communication connection with a plurality of test bed industrial personal computers, and each test bed industrial personal computer corresponds to one test bed; the data processing center receives the original test data sent by the data acquisition modules and processes the original test data, and the test bench industrial personal computers call and display the effective test data obtained after the data processing center processes the data. The invention can lead the data of a plurality of automatic transmission test benches to be shared, has good system stability, can not generate the phenomena of data loss and inaccuracy, and has high accuracy and stability of test data and high test efficiency.
Description
Technical Field
The invention relates to the technical field of transmission test benches, in particular to a data acquisition system and a data acquisition method for a plurality of transmission test benches.
Background
An automatic transmission is a transmission device capable of automatically performing an automatic shift operation according to the vehicle speed and the engine speed. The quality and performance of the automatic transmission are directly related to the working performance of the automobile transmission system, so that the quality and performance of the whole automobile are affected, and therefore, before the automatic transmission leaves the factory, the production enterprises need to carry out bench test on the automatic transmission so as to ensure that the quality and performance of the automatic transmission leaves the factory can meet the design requirements. When the automatic transmission bench test is carried out, pressure and flow data of the clutch of the automatic transmission are required to be collected, at present, simple data collection equipment is generally adopted for collecting the pressure and flow data of the clutch, and then the collected data are directly transmitted to the test bench industrial personal computer. At present, the simple data acquisition equipment has weak anti-interference capability, and the phenomenon of data loss or inaccurate data often occurs in the running process and is easy to damage; meanwhile, the data of each test bench cannot be shared, and the comparison analysis cannot be performed in real time when the same test is performed, so that the accuracy and stability of the test data are poor, and the test efficiency is low.
Disclosure of Invention
Aiming at the defects, the invention aims to provide the data acquisition system and the data acquisition method, which can enable the data of a plurality of automatic transmission test benches to be shared, can perform data comparison analysis in real time, and have the advantages of good system stability, no data loss and inaccuracy, high accuracy and stability of test data and high test efficiency.
In order to achieve the above object, the technical scheme of the present invention is as follows:
the data acquisition system comprises a data processing center, wherein the data processing center is in communication connection with a plurality of data acquisition modules, each data acquisition module corresponds to one test bed, and the data acquisition modules are used for acquiring original test data of the test bed; the data processing center is also in communication connection with a plurality of test bed industrial personal computers, and each test bed industrial personal computer corresponds to one test bed; the data processing center receives the original test data sent by the data acquisition modules and processes the original test data, and the test bench industrial personal computers call and display the effective test data obtained after the data processing center processes the data.
The data processing center is in communication connection with a plurality of EtherCAT couplers, and each EtherCAT coupler is electrically connected with one data acquisition module.
The data acquisition module comprises a sensor arranged on the test bed and a data acquisition module electrically connected with the sensor, and the data acquisition module is electrically connected with the EtherCAT coupler.
The sensor comprises a pressure sensor and a flow sensor, wherein the data acquisition module comprises a pressure acquisition module electrically connected with the pressure sensor and a flow acquisition module electrically connected with the flow sensor, and the pressure acquisition module and the flow acquisition module are electrically connected with the EtherCAT coupler.
And each EtherCAT coupler is in communication connection with the data processing center through a TCP protocol.
The data processing center comprises a PLC (programmable logic controller) in communication connection with each EtherCAT coupler and a communication board card in communication connection with the PLC, and the communication board card is in communication connection with each test bench industrial personal computer.
The communication board card is a CAN communication board card, a USBCAN interface card is installed on the test bench industrial personal computer, the PLC and each test bench industrial personal computer are in communication connection through a CAN network, and labview software is installed in the test bench industrial personal computer.
The data acquisition method realized according to the data acquisition system comprises the following steps: s1, a data acquisition module acquires original test data detected by a sensor; s2, the data acquisition module sends the acquired original test data to a data processing center through an EtherCAT coupler; s3, the data processing center processes the received original test data to obtain effective test data; s4, the test bench industrial personal computer retrieves the effective test data from the data processing center; s5, the test bench industrial personal computer processes the retrieved effective test data; and S6, displaying the processed data by the test stand industrial personal computer.
Wherein, in the step S3, the processing of the raw test data by the data processing center includes the following steps: step S31, converting the received original test data into digital quantity data; step S32, filtering the digital quantity data obtained in the step S31, and removing burrs; step S33, calculating to obtain an actual pressure value and an actual flow value according to the measuring range of the sensor and the data processed in the step S32, namely the effective test data; and step S34, the actual pressure value and the actual flow value calculated in the step S33 are in one-to-one correspondence with DBC files.
In the step S5, the processing of the effective test data by the test stand industrial personal computer includes the following steps: step S51, distributing data according to the address channel of the DBC file; step S52, generating data group data; step S53, calculating according to the equation y=a x+b of the linear regression equation,
wherein:
y-actual data displayed by test bench industrial personal computer
x-data set data
a-ratio of effective test data to data set data
b-sensor offset.
After the technical scheme is adopted, the invention has the beneficial effects that:
because the data acquisition system comprises the data processing center, the data processing center is in communication connection with a plurality of data acquisition modules, each data acquisition module corresponds to one test bed, and the data acquisition modules are used for acquiring the original test data of the test bed; the data processing center is also in communication connection with a plurality of test bed industrial personal computers, and each test bed industrial personal computer corresponds to one test bed; the data processing center receives the original test data sent by each data acquisition module and processes the original test data, and each test bench industrial personal computer calls and displays the effective test data obtained after the data processing center processes. According to the invention, the plurality of test tables are connected in a network in a communication manner through the network, the plurality of test tables share one data processing center, so that the number of data processing equipment is reduced, the expansion of the test tables can be realized, the equipment investment cost is low, meanwhile, the data of the test tables can be shared, and when the same test is carried out, the data of the test tables can be compared and analyzed in real time, thereby being beneficial to evaluating the test results of the test tables. The system has strong anti-interference capability and good stability, and can not cause the phenomena of data loss and inaccuracy, thereby ensuring the accuracy and stability of test data and greatly improving the test efficiency of the automatic transmission.
The data acquisition method is realized based on the data acquisition system, so that the data acquisition method has high accuracy and stability of the acquired data and can greatly improve the test efficiency of the automatic transmission.
In summary, the data acquisition system and the data acquisition method solve the technical problems that test data of the automatic transmission cannot be shared, the data accuracy is poor, the test efficiency is low and the like in the prior art.
Drawings
Fig. 1 is a block diagram of the data acquisition system of the present invention.
Detailed Description
The invention is further illustrated in the following, in conjunction with the accompanying drawings and examples.
The orientations referred to in the present specification are all relative positional relationships, and do not represent absolute positional relationships, and are shown in the drawings.
Examples
As shown in FIG. 1, a data acquisition system comprises a data processing center, a plurality of data acquisition modules and a plurality of test bench industrial personal computers. Each test bed is correspondingly provided with a data acquisition module and a test bed industrial personal computer, so that the number of the data acquisition modules is equal to that of the test bed industrial personal computers, and the data processing center is respectively in communication connection with each data acquisition module and is also respectively in communication connection with each test bed industrial personal computer. The data acquisition module is used for acquiring the original test data of the test bed, the data processing center receives the original test data sent by each data acquisition module and processes the original test data to obtain effective test data, and each test bed industrial personal computer invokes the effective test data of the test bed obtained after the data processing center processes the effective test data and displays the effective test data after the effective test data are processed. When a plurality of test tables carry out the same test, the industrial personal computer of each test table can also call the data of other test tables and carry out real-time comparison analysis with the data of the own test table. It should be noted that: the four test stands shown in the drawings are merely illustrative of the data acquisition system according to the present embodiment, and the number of test stands to which the data acquisition system according to the present invention can be connected is not limited to four, but may be two, three, or seven or eight, and this may be selected according to the scale of the test center.
As shown in fig. 1, in this embodiment, the data processing center and the data acquisition modules are preferably in communication connection through EtherCAT couplers, the number of the EtherCAT couplers is equal to that of the data acquisition modules, and each data acquisition module is provided with an EtherCAT coupler. The EtherCAT coupler is electrically connected with the data acquisition module and is in communication connection with the data processing center. The data acquisition module collects the acquired data to an EtherCAT coupler, and the EtherCAT coupler transmits the collected data to the data processing center through a network.
As shown in FIG. 1, the data acquisition module comprises a sensor arranged on the test bed and a data acquisition module electrically connected with the sensor, and the data acquisition module is electrically connected with the EtherCAT coupler. The sensor in this embodiment includes a pressure sensor for detecting an automatic transmission clutch pressure and a flow sensor for detecting an automatic transmission clutch flow. In the present embodiment, the pressure sensor is preferably a mebenia pressure sensor, and the output signal is preferably 4 to 20mA. In the present embodiment, the flow sensor is preferably a haddock flowmeter, and the output signal is preferably a frequency signal. In this embodiment, the data acquisition module includes a pressure acquisition module electrically connected with the pressure sensor and a flow acquisition module electrically connected with the flow sensor, where the pressure acquisition module and the flow acquisition module are electrically connected with the etherCAT coupler. In this embodiment, the pressure acquisition module is preferably a double-Fu EL3145, the flow acquisition module is preferably a double-Fu EL1502, and the EtherCAT coupler is preferably a double-Fu EK1100.
As shown in fig. 1, the data processing center includes a PLC (Programmable Logic Controller ) communicatively connected to each EtherCAT coupler, and a communication board communicatively connected to the PLC, and the communication board is communicatively connected to each test bench industrial personal computer. In this embodiment, the communication board card is preferably a CAN (Controller Area Network ) communication board card, each test bench industrial personal computer is provided with a USBCAN interface card, the PLC and each test bench industrial personal computer are in communication connection through a CAN communication network, and labview software is installed in the test bench industrial personal computer. The PLC processes the data sent by the EtherCAT coupler, the data processed by the PLC is sent to a CAN communication network through a CAN communication board card, and the test stand industrial personal computer invokes the data through a USBCAN interface card and labview software.
As shown in fig. 1, in this embodiment, it is preferable that each EtherCAT coupler is communicatively connected to the PLC via a TCP (Transmission Control Protocol ) protocol, that is, each EtherCAT coupler is communicatively connected to the data processing center via a TCP protocol.
Examples
A data acquisition method implemented by the data acquisition system according to the first embodiment comprises the following steps:
s1, a data acquisition module acquires original test data detected by a sensor;
s2, the data acquisition module transmits the acquired original test data to the data processing center through the EtherCAT coupler;
s3, the data processing center processes the received original test data to obtain effective test data;
s4, the test bench industrial personal computer retrieves effective test data from the data processing center;
s5, the test bench industrial personal computer processes the retrieved effective test data;
and S6, displaying the processed data by the test bench industrial personal computer.
The following describes the above six steps in detail.
Step S1:
the pressure sensor detects the pressure value of the clutch of the automatic transmission, and outputs a 4-20 mA current signal, and the pressure acquisition module acquires the 4-20 mA current signal output by the pressure sensor. The flow sensor detects the flow value of the clutch of the automatic transmission and outputs a frequency signal, and the flow acquisition module acquires the frequency signal output by the flow sensor.
Step S2:
the pressure acquisition module and the flow acquisition module collect the acquired original test data to an EtherCAT coupler, and the EtherCAT coupler transmits the collected original test data to the PLC through the TPC network.
Step S3:
and the PLC receives the original test data sent by the EtherCAT coupler and processes the received original test data to obtain effective test data.
The processing of the original test data by the PLC comprises the following steps:
step S31, converting the received current signal and frequency signal of the original test data into digital quantity data. Pressure data: the PLC firstly converts a current signal of 4-20 mA into a voltage signal of 1-5V, and then converts the voltage signal of 1-5V into digital data. Flow data: the PLC converts the frequency signal into a voltage signal of 1-5V, and then converts the voltage signal of 1-5V into digital data.
And step S32, filtering the digital quantity data obtained in the step S31 to remove burrs.
And step S33, calculating to obtain an actual pressure value and an actual flow value according to the measuring range of the sensor and the data obtained after the processing in the step S32, namely the effective test data. For example: the output signal of the pressure sensor is 4-20 mA, the measuring range is 0-1 MP, the voltage signal corresponding to 4-20 mA is 1-5V, 1V corresponds to 0MP and 5V corresponds to 1MP in the PLC, and the actual pressure value is obtained by multiplying the digital quantity data filtered in the step S32 by 1/5. The method of calculating the flow value is the same as the method of calculating the pressure value, and therefore will not be described in detail here.
And step S34, the actual pressure value and the actual flow value calculated in the step S33 are in one-to-one correspondence with the DBC file (the file of the CAN communication matrix), namely, the data are correlated with the physical address in the DBC file, so that the test bench industrial personal computer CAN call the effective test data.
Step S4:
and the test bed industrial personal computer is used for calling the effective test data from the data processing center, namely calling the effective test data of the test bed or the effective test data of other test beds according to the DBC file.
Step S5:
the test stand industrial personal computer processes the retrieved effective test data, and comprises the following steps:
step S51, distributing data according to the address channel of the DBC file;
step S52, generating data group data;
step S53, calculating according to the equation y=a x+b of the linear regression equation,
wherein:
y-actual data displayed by test bench industrial personal computer
x-data set data
a-ratio of effective test data to data set data
b-sensor offset.
In step S53, because the data is converted in the network transmission, the data set data generated by the industrial personal computer of the test bench is inconsistent with the effective test data calculated by the PLC, so that the data needs to be back pushed according to the equation of the linear regression equation in this step, so that the data finally displayed by the industrial personal computer of the test bench is consistent with the data calculated by the PLC. In the present embodiment, the following is described. A=0.00755 and b= -2.125 in the pressure value calculation formula; the flow value calculation formula has a=0.00390625 and b=0, and in practical applications a and b are not fixed values. The value a is calibrated, namely, a plurality of points are acquired during the test to obtain the ratio of effective test data (namely actual pressure and actual flow) to the numerical value (data set data) directly displayed on the industrial personal computer of the test bed; and b is the offset of the sensor, after the two values of a and b are determined, the program of the test bench industrial personal computer is modified, and the data of the data set is calculated by the formula y=a x+b, so that an actual pressure value and an actual flow value are obtained and are displayed by the test bench industrial personal computer.
According to the data acquisition system and the data acquisition method, the plurality of test tables are connected in the network in a communication mode through the network, the plurality of test tables share the same data processing center, the number of data processing equipment is reduced, expansion of the test tables can be achieved, equipment investment cost is low, meanwhile, data among the test tables can be shared, when the same test is carried out, real-time comparison and analysis can be carried out on the data of the test tables, and assessment of test results of the test tables is facilitated. The system has strong anti-interference capability and good stability, and can not cause the phenomena of data loss and inaccuracy, thereby ensuring the accuracy and stability of test data and greatly improving the test efficiency of the automatic transmission.
The present invention is not limited to the above-described specific embodiments, and various modifications may be made by those skilled in the art without inventive effort from the above-described concepts, and are within the scope of the present invention.
Claims (7)
1. The data acquisition system is characterized by comprising a data processing center, wherein the data processing center is in communication connection with a plurality of data acquisition modules, each data acquisition module corresponds to one test bed, and the data acquisition module is used for acquiring original test data of the test bed; the data processing center is also in communication connection with a plurality of test bed industrial personal computers, and each test bed industrial personal computer corresponds to one test bed; the data processing center receives the original test data sent by each data acquisition module and processes the original test data, and each test stand industrial personal computer invokes the effective test data obtained after the data processing center processes and displays the effective test data;
the data acquisition method realized by the data acquisition system comprises the following steps:
s1, a data acquisition module acquires original test data detected by a sensor;
s2, the data acquisition module sends the acquired original test data to a data processing center through an EtherCAT coupler;
s3, the data processing center processes the received original test data to obtain effective test data;
s4, the test bench industrial personal computer retrieves the effective test data from the data processing center;
s5, the test bench industrial personal computer processes the retrieved effective test data;
s6, the test bench industrial personal computer displays the processed data;
in the step S3, the processing of the raw test data by the data processing center includes the following steps:
step S31, converting the received original test data into digital quantity data;
step S32, filtering the digital quantity data obtained in the step S31, and removing burrs;
step S33, calculating to obtain an actual pressure value and an actual flow value according to the measuring range of the sensor and the data processed in the step S32, namely the effective test data;
step S34, the actual pressure value and the actual flow value calculated in the step S33 are in one-to-one correspondence with DBC files;
in the step S5, the processing of the effective test data by the test stand industrial personal computer includes the following steps:
step S51, distributing data according to the address channel of the DBC file;
step S52, generating data group data;
step S53, calculating according to the equation y=a x+b of the linear regression equation,
wherein:
y-actual data displayed by test bench industrial personal computer
x-data set data
a-ratio of effective test data to data set data
b-sensor offset.
2. The data acquisition system of claim 1 wherein the data processing center is communicatively coupled to a plurality of EtherCAT couplers, each of the EtherCAT couplers being electrically coupled to one of the data acquisition modules.
3. The data acquisition system of claim 2, wherein the data acquisition module comprises a sensor mounted on the test stand and a data acquisition module electrically connected to the sensor, the data acquisition module being electrically connected to the EtherCAT coupler.
4. The data acquisition system of claim 3 wherein the sensor comprises a pressure sensor and a flow sensor, the data acquisition module comprises a pressure acquisition module electrically connected to the pressure sensor and a flow acquisition module electrically connected to the flow sensor, and both the pressure acquisition module and the flow acquisition module are electrically connected to the EtherCAT coupler.
5. The data acquisition system of claim 2, wherein each EtherCAT coupler is communicatively coupled to the data processing center via a TCP protocol.
6. The data acquisition system of claim 5, wherein the data processing center comprises a PLC in communication with each EtherCAT coupler and a communication board in communication with the PLC, the communication board in communication with each test stand industrial personal computer.
7. The data acquisition system of claim 6, wherein the communication board is a CAN communication board, a USBCAN interface card is installed on the laboratory industrial personal computer, the PLC is in communication connection with each laboratory industrial personal computer through a CAN network, and labview software is installed in the laboratory industrial personal computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211660845.4A CN115657594B (en) | 2022-12-23 | 2022-12-23 | Data acquisition system and acquisition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211660845.4A CN115657594B (en) | 2022-12-23 | 2022-12-23 | Data acquisition system and acquisition method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115657594A CN115657594A (en) | 2023-01-31 |
| CN115657594B true CN115657594B (en) | 2023-05-16 |
Family
ID=85023312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211660845.4A Active CN115657594B (en) | 2022-12-23 | 2022-12-23 | Data acquisition system and acquisition method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115657594B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108600192A (en) * | 2018-04-03 | 2018-09-28 | 南京越博动力系统股份有限公司 | A kind of DBC document analysis and message analysis method based on regular expression |
| CN110674357A (en) * | 2019-10-18 | 2020-01-10 | 国网福建省电力有限公司检修分公司 | Intelligent test data management system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008061558A1 (en) * | 2008-12-11 | 2009-09-17 | Daimler Ag | Air conditioning test stand for testing function of e.g. motor control device, of motor vehicle, has vehicle electric box comprising interfaces to automation unit and test sample, where test sample is automatically detected by electric box |
| CN102645634B (en) * | 2012-04-25 | 2014-03-26 | 北京理工大学 | Vehicle driving motor test stand data acquisition system based on LabVIEW |
| CN202904373U (en) * | 2012-11-21 | 2013-04-24 | 湖北航天技术研究院特种车辆技术中心 | Signal monitoring system of vehicle electronic control unit test bed based on CAN bus |
| CN103541948B (en) * | 2013-10-25 | 2015-12-09 | 北京理工大学 | Test stand for hydraulic element Distributed Status Monitoring network system |
| CN106644470A (en) * | 2017-02-07 | 2017-05-10 | 盛瑞传动股份有限公司 | Control method of idle testing platform of speed change box |
| CN107452237A (en) * | 2017-06-15 | 2017-12-08 | 上海工程技术大学 | A kind of car body controller module experimental platform based on shared cloud |
| CN208125392U (en) * | 2018-04-23 | 2018-11-20 | 北京博科测试系统股份有限公司 | Whole electric vehicle energy efficiency detection system |
-
2022
- 2022-12-23 CN CN202211660845.4A patent/CN115657594B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108600192A (en) * | 2018-04-03 | 2018-09-28 | 南京越博动力系统股份有限公司 | A kind of DBC document analysis and message analysis method based on regular expression |
| CN110674357A (en) * | 2019-10-18 | 2020-01-10 | 国网福建省电力有限公司检修分公司 | Intelligent test data management system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115657594A (en) | 2023-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104808584A (en) | Multi-information online detection system for machine tool multi-source energy consumption system | |
| CN101533052B (en) | Testing system and method for PWM fan electrical performance | |
| CN115657594B (en) | Data acquisition system and acquisition method | |
| CN101393240A (en) | Electric network harmonic on-line supervisory circuit based on virtual instrument and working method thereof | |
| CN205080419U (en) | Equipment running state automatic acquisition records query engine device | |
| CN112536643B (en) | Machine health monitoring method and device and computer readable storage medium | |
| CN102081377A (en) | Thermal error compensation device on basis of numerical control workbench | |
| CN111505501A (en) | Motor dynamic loading and transient testing device | |
| CN1987369A (en) | Multifunction sensor detector | |
| CN204043759U (en) | Liquid level sensor automatic testing equipment | |
| CN105182131A (en) | General test platform and test method | |
| CN101749302A (en) | On-line virtual testing analysis system of electrohydraulic servo system | |
| CN100462676C (en) | Piston integrated measurement system | |
| CN112362088A (en) | Synchronous acquisition method and system for multi-grating data | |
| CN112504717B (en) | Dynamic and static characteristic recognition device of movement device | |
| CN211319745U (en) | Nuclear power plant signal display system | |
| CN215576583U (en) | Universal serial bus port detection device | |
| CN215420595U (en) | Communication system for transmitting flue gas dust removal data in RS485 communication mode | |
| CN214669353U (en) | Current detection system | |
| CN109342660A (en) | SCM Based gas sensor array output detection system and detection method | |
| CN219533193U (en) | Visual test platform of accelerometer based on MFC | |
| CN215952754U (en) | High-reliability multi-channel vibration signal adjusting system for nuclear power station | |
| CN113701868B (en) | Semi-physical simulation platform and method of weighing system and stirring station | |
| CN215491847U (en) | Rotating equipment vibration and temperature monitoring device based on LORA | |
| CN107515340B (en) | Detection device and detection method for starting box |
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 |