CN1477525A - Wireless circulation detector and its circulation detection method - Google Patents
Wireless circulation detector and its circulation detection method Download PDFInfo
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- CN1477525A CN1477525A CNA031303560A CN03130356A CN1477525A CN 1477525 A CN1477525 A CN 1477525A CN A031303560 A CNA031303560 A CN A031303560A CN 03130356 A CN03130356 A CN 03130356A CN 1477525 A CN1477525 A CN 1477525A
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Abstract
The circulation detection instrument includes mother node module and at least one subnode module, its subnode module includes at least one sensor, the described sensor is connected with data processing unit by means of A/D interface of data interface, the described data processing unit is connected with subnode wireless transceiving module, and the computing treatment unit in the mother node module is respectively connected with mother node wireless transceiving module, control keyboard, display, memory, time module, A/D interface or digital interface, the A/D interface of digital interface is connected with sensor for correction. By changing the sensor it can sample several data.
Description
Technical field
The present invention relates to a kind of measurement mechanism and measuring method of particular variables, in particular, relate to a kind of logging and method for inspecting thereof.
Background technology
Existing logging generally is the respective sensor that need are patrolled and examined to be connected with logging by circuit realize corresponding monitoring.Need roving occasion for test, debugging etc., wiring is complicated, uses inconvenient.And investment is big.
Summary of the invention
The present invention is in order to overcome weak point of the prior art, provide a kind of wiring less, the scope of patrolling and examining is big, can realize the logging of the long-term access facility of data.
The present invention is achieved through the following technical solutions:
A kind of radio patrol checking instrument, comprise parent node module and at least one child node module, the information that the collection of described child node module need be patrolled and examined, described parent node module is used for the information that each child node module of computing is gathered, be provided with the child node radio receiving transmitting module in the described child node module, be provided with the parent node radio receiving transmitting module in the described parent node module, described each child node module is passed through child node radio receiving transmitting module, parent node radio receiving transmitting module and parent node module exchange message separately.
Described parent node module is by wired or wireless communication modes and computer system exchange message.
Described child node module comprises at least one sensor, and described sensor is connected with data processing unit by A/D interface or data-interface, and described data processing unit is connected with the child node radio receiving transmitting module.
Described data processing unit is connected with storer.
Described parent node module comprises calculation processing unit, and described calculation processing unit is connected with parent node radio receiving transmitting module, supervisory keyboard, display respectively, and described supervisory keyboard is a numeric keypad, is used to import the numbering of each child node.
Described computing module with storer or/and time module be connected.
Described computing module is connected with A/D interface or digital interface, described A/D interface or digital interface and the sensor that is used to proofread and correct.
A kind of method for inspecting of radio patrol checking instrument comprises the steps:
(1) each child node module, the initialization respectively of parent node module;
(2) the parent node module judges whether to patrol and examine the sampled data of sensor, if do not need to patrol and examine, then continues to judge whether to patrol and examine the sensor acquisition data message;
(3) patrol and examine the sensor acquisition data message if desired, then send to the child node module and patrol and examine signal by the parent node radio receiving transmitting module in the parent node module;
(4) the child node module detects the needs that whether have the parent node module to send and patrols and examines the child node module information, if do not have to patrol and examine the child node module information, then enters sleep state;
(5) if the information of need patrolling and examining is arranged, the child node module receives the signal that the parent node module is sent, and carries out data check; Judge whether to need to detect this node;
(6) if do not need to detect this node, then enter sleep state;
(7) detect this node if desired, then start book node module sensor, carry out data acquisition; The child node module sends to the parent node module with the data message that collects;
(8) the parent node module is waited for certain hour, judges whether the data message that the child node module is sent afterwards;
(9) if the information that does not have the child node module to send then shows communication failure, return step (3);
(10) if the information that has the child node module to send is then carried out data check; If the result of data check is an error in data, then return step (8); If the data check result is correct, then send out confirmation signal to sending successful child node module;
(11) after the child node module is received the affirmation information that the parent node module sends, enter sleep state, finish this node and patrol and examine process;
(12) the child node module is waited at sleep state and being patrolled and examined next time; If the signal of patrolling and examining that the parent node module sends is arranged, then enters and patrol and examine process next time.
When computer system is connected with the parent node module,, then carry out the following step if when the parent node module does not need to patrol and examine the sampled data of sensor:
(1) judged whether computer port information,, then returned the sampled data that the parent node module judges whether to patrol and examine sensor if there is not computer port information;
(2) if computer port information is arranged, judge whether to read canned data;
(3) if read canned data, then read canned data, return afterwards, the calculation processing unit in the parent node module judges whether to patrol and examine the sampled data of sensor;
(4) if do not read canned data, then the sample mode of setting according to computer command is patrolled and examined process.
In said method, finish the process of patrolling and examining after, with data presentation, preservation, and preserve current information of time.
The present invention has following beneficial effect:
1. owing to adopt wireless communication mode, reduced wiring quantity, being applicable to needs roving occasion; And can increase the scope of patrolling and examining by adjusting the wireless transmit distance.
2. owing to adopt the digital transmission verification, overcome the error that Line Attenuation brings.
3. because calculation processing unit is connected with the bigger storer of data processing unit and capacity, can realize the long-term access of data.
Description of drawings
Fig. 1 is a radio patrol checking instrument The general frame;
Fig. 2 is a radio patrol checking instrument child node inside modules structural drawing;
Fig. 3 is a radio patrol checking instrument parent node inside modules structural drawing;
Fig. 4 is a radio patrol checking instrument child node module workflow diagram;
Fig. 5 is a radio patrol checking instrument parent node module workflow diagram;
Fig. 6 patrols and examines workflow diagram for the radio patrol checking instrument;
The packet synoptic diagram that Fig. 7 sends for the parent node module;
The packet synoptic diagram that Fig. 8 sends for the child node module;
Fig. 9 is the packet synoptic diagram of the affirmation of parent node module transmission.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Radio patrol checking instrument The general frame of the present invention comprises parent node module and a plurality of child node module as shown in Figure 1.The information that the collection of child node module need be patrolled and examined, the information that the computing of parent node module is gathered.In order to reduce wiring, each child node module and parent node module are by the wireless communication mode exchange message.In each child node module, child node radio receiving transmitting module and antenna thereof are housed, parent node radio receiving transmitting module and antenna thereof are housed in the parent node module.Each child node module is passed through child node radio receiving transmitting module and antenna, parent node radio receiving transmitting module and antenna thereof and parent node module exchange message separately.The quantity of the point that the number of child node module detects is as required determined.Calculate and gather the processing of back data for convenience and handle, this logging can be connected with computer system.
The structure of each child node module comprises one or more sensors as shown in Figure 2, and the parameter of patrolling and examining as required, the kind of sensor can be temperature sensor, humidity sensor, pressure transducer, strain gauge, illuminance sensor etc.The parameter that sensor is patrolled and examined according to the applied environment and the needs of logging is determined.One or more sensors are connected with data processing unit by A/D interface or data-interface, the interface shape of use A/D interface or data-interface view sensor and deciding.Data processing unit is connected with the child node radio receiving transmitting module.In order to realize the long-term access of data, enlarge the storage data volume, storer can be connected with data processing module.
The structure of parent node module comprises calculation processing unit etc. as shown in Figure 3.Calculation processing unit is connected with supervisory keyboard, display respectively.Supervisory keyboard is a numeric keypad, is used to import the numbering of the point that need patrol and examine, and the sampling numerical value of display demonstration each point and communication failure etc. need the information of demonstration.Calculation processing unit can be connected with storer, and this memory requirement capacity is bigger, the data after handling with storage computation.Can adopt time module to provide clock for system.Can add the sensor of one or more check and correction usefulness in the parent node module, the accuracy requirement of this sensor is higher, is used for determining the precision of each sensor of child node module.The sensor of check and correction usefulness is connected with the computing module by A/D interface or digital interface.The computing module is connected with computer system.
Be example explanation the present invention to patrol and examine temperature, humidity information below.
In each child node module, be provided with temperature sensor and humidity sensor.Temperature sensor can select for use PT100 or PT1000 thermistor and peripheral circuit thereof to form, and also can adopt the sensor of analog quantity outputs such as AD590 or TMP36, also can adopt DS18b20 integrated temperature sensor etc.Humidity sensor can be selected the sensor of HM1500 analog quantity output for use, also can adopt the sensor of HF3223 digital interface.When being output as analog quantity the A/D translation interface should be set in circuit.Data processing unit can adopt inside to have the single-chip microcomputer of A/D interface, to save peripheral A/D interface circuit, such as the PIC16F873/PIC16F876 that adopts microchip company etc., also can adopt for example 8051 series monolithic AT89C2051 that are not with the A/D interface etc.The A/D interface can be selected MAX5104, MAX5121, AD574 etc. for use.Radio receiving transmitting module can be selected the data communication module of low prices commonly used such as 315MHz or 433MHz, as 401-2FSK, and 401-1FSK etc.Single-chip microcomputer itself has certain RAM or EEPROM, can increase certain RAM or EEPROM at peripheral port if can not satisfy the demand, can select 21C67 for use, IS75V16F64GS16 or IS75V16F64GS32, EEPROM can select FM24CL16, FM24CL04 etc. for use.Temperature sensor, humidity sensor are connected with A/D interface or digital interface, are connected with single-chip microcomputer afterwards, single-chip microcomputer is connected with child node radio receiving transmitting module, storer respectively and promptly forms a child node.
In the parent node module, the parent node radio receiving transmitting module can be selected the data communication module of low prices commonly used such as 315MHz or 433MHz, as 401-2FSK, and 401-1FSK.Calculation processing unit can adopt direct inside to have the single-chip microcomputer of A/D interface, to save peripheral A/D interface circuit, such as the PIC16F873/PIC16F876 that adopts microchip company etc., also can adopt for example 8051 series monolithic AT89C2051 that are not with the A/D interface etc.Display can be selected 8 common segment encode light-emitting diode displays for use, also can select the LCD of generalized ribbon Chinese character base, for example LCM12864ZK etc.Supervisory keyboard adopts numeric keypad, is used to import the numbering of each child node.In order to improve degree of accuracy, temperature, the humidity sensor of in the parent node module, packing into and proofreading usefulness, the temperature of check and correction usefulness, the accuracy requirement of humidity sensor want high, can adopt high PT1000 of precision and HM1500 model.Time module can be selected DS1307 for use, also can select DS12887 time special chip, for native system provides clock.Temperature, humidity sensor are connected with A/D interface or digital interface, be connected with single-chip microcomputer afterwards as calculation processing unit, single-chip microcomputer as calculation processing unit is connected with parent node radio receiving transmitting module, time module, storer, supervisory keyboard, display respectively, promptly forms the parent node module.
A plurality of child node modules and parent node module are installed in the position that needs, promptly form a radio patrol checking instrument.This logging can be connected with computer system if desired.
Before the work of patrolling and examining begins, in order to guarantee to patrol and examine the accuracy of data, the sensor of the sensor of parent node module and child node module, be placed on same wanting in the testing environment, if in the child node module in sensor data presented and the parent node module sensor to data significant difference is arranged, surpassed the error allowed band, thought that then the child node module sensors lost efficacy, needed to change.
Logging child node module workflow diagram as shown in Figure 4, logging parent node module workflow diagram as shown in Figure 5, logging patrol and examine workflow diagram as shown in Figure 6, the initialization respectively of the calculation processing unit of the data processing unit of each child node module and parent node module.Calculation processing unit in the parent node module judges whether to patrol and examine the sampled data of sensor.The routine inspection mode of parent node module can be imported as required by the supervisory keyboard on the parent node module, also can set certain rule of patrolling and examining.If do not need to patrol and examine, then calculation processing unit continues to judge whether to patrol and examine the sensor acquisition data message; Patrol and examine the sensor acquisition data message if desired, then calculation processing unit sends to the child node module by the parent node radio receiving transmitting module and patrols and examines signal.The data processing unit of each child node module detects the needs that whether have the parent node module to send and patrols and examines the information of child node module, if there is not to patrol and examine the information of child node module, then data processing unit enters sleep state.If the information that need patrol and examine the child node module is arranged, the radio receiving transmitting module in the data processing unit control child node module receives the signal that the parent node module is sent.Data processing unit is received the laggard line data verification of signal, judges whether to need to detect this node; If do not need to detect this node, then data processing unit enters sleep state; Detect this node if desired, then start the corresponding sensor of book node module, carry out data acquisition; The child node module is sent the data message that collects after Filtering Processing by the child node radio receiving transmitting module.Wait for that afterwards the parent node module sends confirmation.After waiting for certain hour,, then retransmit, simultaneously the number of times of retransmitting is limited if there is not the affirmation information of parent node module.If to retransmitting number of times, then data processing unit enters sleep state.If be less than the number of times of repeating transmission, then wait for certain hour after, if still there is not the affirmation information of parent node module, then retransmit.The information that radio receiving transmitting module in the parent node module is sent the child node module of receiving is delivered to the calculation processing unit in the parent node module.The parent node module is waited for certain hour after sending and patrolling and examining signal, judges whether the data message that the child node module is sent afterwards; If the information that does not have son joint module point to send then shows communication failure by display, return, the calculation processing unit in the parent node module continues to judge whether to patrol and examine the sampled data of sensor.If the information that has the child node module to send, then calculation processing unit carries out data check; If the result of data check is an error in data, then the parent node module continues to receive the information that the child node module is sent, and waits for that surpassing certain hour does not still have correct information, the report miscommunication; If data check is correct, promptly the child node module sends successfully, and then calculation processing unit is sent out confirmation signal by the parent node radio receiving transmitting module to sending successful child node module.The child node module enters sleep state after receiving the affirmation information that the parent node module sends, and finishes this and patrols and examines process, waits for and patrolling and examining next time.According to actual needs, the parent node module can patrol and examine finish after, will patrol and examine data and on display, show, perhaps be saved in the storer, simultaneously current information of time is saved in the storer.Return afterwards, the calculation processing unit in the parent node module continues to judge whether to patrol and examine the sampled data of sensor.
Calculation processing unit in the parent node module can be connected with computer system by wired or wireless communication modes according to actual needs, be used for computer system and logging exchange message.At this moment, calculation processing unit in the parent node module has judged whether computer port information when not needing to patrol and examine the sampled data of sensor, if there is not computer port information, return, the calculation processing unit in the parent node module judges whether to patrol and examine the sampled data of sensor.If computer port information is arranged, then judge whether to read canned data.If read canned data, then read canned data, return afterwards, the calculation processing unit in the parent node module judges whether to patrol and examine the sampled data of sensor.If do not need to read canned data, then the sample mode of setting according to computer command is patrolled and examined process.
The child node module is waited for when sleep state and being patrolled and examined next time.If the signal of patrolling and examining that the parent node module sends is arranged, then data processing unit is waken up with interrupt techniques, enter duty from sleep state, enter the process of next time patrolling and examining.
In the process of patrolling and examining, the parent node module wants to gather the data of certain child node module, the parent node module at first sends one and gathers wireless signal, for fear of obscuring with other equipment, this signal should contain the data packet head of definition voluntarily according to certain data format, the syndrome section that contains whole packet in the packet header, want the node number of acquisition node,, also will comprise the sensor that to gather number if each child node module has under the situation of a plurality of sensors.If also will contain timestamp under the situation about needing.The packet that the parent node module sends as shown in Figure 5, data head 1 comprises some start bits, the characteristic sequence 1 of some, whole data length, the syndrome section comprises the verification of whole packet, occupies a fixing length.Data comprise two parts: a part is the sensor that will gather number, occupies certain regular length, and another part is the sensor that will gather number, also occupies certain regular length, correspondence position 1 in the time of sampling a certain sensor, otherwise be 0.Total bit is identical with the number of sensors of sensor node.All child node modules all can receive this information, and the child node module enters duty in case discovery has data with interrupt techniques data processing unit to be waken up at once from sleep state.
All child node modules all can be analyzed the packet that this parent node module is sent, and data packet head does not meet, or the verification mistake then directly abandons, and enter sleep state.If meeting, data packet head then continues if node number and the node number of itself are misfitted, then to enter sleep state to judging.Under the situation of coincideing, detect the sensor number of wanting image data, start these sensors, carry out data acquisition then.
The child node module sends the data that convert, this packet also adopts a given data, first packet header (the syndrome section that should contain whole packet in the packet header), this packet header should be different with the packet header of parent node module transmission, second portion is data, at first is number of sensor, the sampled data of sensor (taking a few height joints provides in advance according to accuracy requirement), be again sensor number then, sensing data.The packet that child node sends as shown in Figure 6, data head 2 comprises some start bits, the characteristic sequence 2 of some, whole data length, the syndrome section comprises the verification of whole packet, occupies a fixing length.Data comprise two parts: a part is the sensor that will gather number, occupies certain regular length, and another part is the sensor that will gather number and data thereof.If a plurality of sensing datas are arranged, add up backward always.
Parent node receives the data that child node sends at last, analyze verification, look to be own desired data, after confirming correctly, give child node according to this signal according to certain data format, such as for fear of obscuring with other equipment, should contain the data packet head of definition voluntarily, (the syndrome section that should contain whole packet in the packet header) gathered the node number of node.The packet of the affirmation that parent node sends as shown in Figure 7, packet 3 comprises some start bits, the characteristic sequence of some, whole data length, the syndrome section comprises the verification of whole packet, occupies a fixing length.Data comprise the sensor that will gather number occupies certain regular length.
Wireless communication module can adopt the data communication module of low price, as 401-2FSK, and 401-1FSK, 200 meters of wireless data transmission module speed 4800bit/s distances, power supply 2.7V-5.2V, two kinds of different frequencies are adopted in transmitting-receiving, adopt the working method of full duplex.The transmitting-receiving of data avoids each child node to send the conflict of data simultaneously by parent node unified management scheduling.Also can adopt the single worker's pattern of single-frequency TDMA time division multiplex, time synchronizing signal is regularly sent by parent node.Each child node is dispensed on the different timeslices.Avoided each child node to send the conflict of data simultaneously.
Because there is more interference in radio communication, generally do not have error correction for the radio receiving transmitting module of low price, error correction can be adopted cyclic redundancy check (CRC) on software, adopt the output Fang Fang of the many sampled points of low rate on the coded format.Can adopt common Manchester's cde, also can adopt and represent for one 1,000 0,1110 to represent 1 and the strong coded format of the similar antijamming capability of pt2262/2272 integrated circuit coded format.
Radio patrol checking instrument of the present invention has reduced the trouble of wiring owing to adopt wireless communication mode to realize each child node module and parent node module exchange message, and can patrol and examine scope apart from expansion by adjusting wireless transmit.Adopt the digital transmission verification, overcome the error that the circuit transmission attenuation brings.Can realize patrolling and examining point, patrol frequency by software flexibly, can realize the long-term access of data.By emat sensor more, the several data of can sampling.Because calculation processing unit is connected with the bigger storer of data processing unit and capacity, can realize the long-term access of data.
Claims (10)
1. radio patrol checking instrument, comprise parent node module and at least one child node module, the information that the collection of described child node module need be patrolled and examined, described parent node module is used for the information that each child node module of computing is gathered, it is characterized in that, be provided with the child node radio receiving transmitting module in the described child node module, be provided with the parent node radio receiving transmitting module in the described parent node module, described each child node module is passed through child node radio receiving transmitting module, parent node radio receiving transmitting module and parent node module exchange message separately.
2. radio patrol checking instrument according to claim 1 is characterized in that, described parent node module is by wired or wireless communication modes and computer system exchange message.
3. radio patrol checking instrument according to claim 1 and 2, it is characterized in that, described child node module comprises at least one sensor, and described sensor is connected with data processing unit by A/D interface or data-interface, and described data processing unit is connected with the child node radio receiving transmitting module.
4. radio patrol checking instrument according to claim 3 is characterized in that described data processing unit is connected with storer.
5. radio patrol checking instrument according to claim 4, it is characterized in that, described parent node module comprises calculation processing unit, described calculation processing unit is connected with parent node radio receiving transmitting module, supervisory keyboard, display respectively, described supervisory keyboard is a numeric keypad, is used to import the numbering of each child node.
6. radio patrol checking instrument according to claim 5 is characterized in that, described computing module with storer or/and time module be connected.
7. radio patrol checking instrument according to claim 6 is characterized in that, described computing module is connected with A/D interface or digital interface, and described A/D interface or digital interface are connected with the sensor that is used to proofread and correct.
8. the method for inspecting of a radio patrol checking instrument is characterized in that, comprises the steps:
(1) each child node module, the initialization respectively of parent node module;
(2) the parent node module judges whether to patrol and examine the sampled data of sensor, if do not need to patrol and examine, then continues to judge whether to patrol and examine the sampled data of sensor;
(3) patrol and examine the sensor acquisition data message if desired, then send to the child node module and patrol and examine signal by the parent node radio receiving transmitting module in the parent node module;
(4) the child node module detects the needs that whether have the parent node module to send and patrols and examines the child node module information, if do not have to patrol and examine the child node module information, then enters sleep state;
(5) if having and need patrol and examine the child node module information, then the child node module receives the signal that the parent node module is sent, and carries out data check; Judge whether to need to detect this node;
(6) if do not need to detect this node, then the book node module enters sleep state;
(7) detect this node if desired, then start book node module sensor, carry out data acquisition; The child node module sends to the parent node module with the data message that collects;
(8) the parent node module is waited for certain hour, judges whether the data message that the child node module is sent afterwards;
(9) if the information that does not have the child node module to send then shows communication failure, return step (3);
(10) if the information that has the child node module to send is then carried out data check; If the result of data check is an error in data, then return step (8); If the data check result is correct, then send out confirmation signal to sending successful child node module;
(11) after the child node module is received the affirmation information that the parent node module sends, enter sleep state, finish this node and patrol and examine process;
(12) the child node module is waited at sleep state and being patrolled and examined next time; If the signal of patrolling and examining that the parent node module sends is arranged, then enters and patrol and examine process next time.
9. the method for inspecting of radio patrol checking instrument according to claim 8 is characterized in that, if the parent node module does not need to patrol and examine the sampled data of sensor, then carries out the following step:
(1) judged whether computer port information,, then returned that the parent node module judges whether to patrol and examine the sampled data of sensor if there is not computer port information;
(2) if computer port information is arranged, judge whether to read canned data;
(3) if read canned data, then read canned data, return afterwards, the calculation processing unit in the parent node module judges whether to patrol and examine the sampled data of sensor;
(4) if do not read canned data, then the sample mode of setting according to computer command is patrolled and examined process.
10. according to Claim 8 or the method for inspecting of 9 described radio patrol checking instrument, it is characterized in that, finish the process of patrolling and examining after, with data presentation, preservation, and preserve current information of time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031303560A CN1477525A (en) | 2003-07-02 | 2003-07-02 | Wireless circulation detector and its circulation detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031303560A CN1477525A (en) | 2003-07-02 | 2003-07-02 | Wireless circulation detector and its circulation detection method |
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| CN1477525A true CN1477525A (en) | 2004-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA031303560A Pending CN1477525A (en) | 2003-07-02 | 2003-07-02 | Wireless circulation detector and its circulation detection method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416618C (en) * | 2006-02-17 | 2008-09-03 | 成兵 | Equipment point-detecting method and system |
| CN102620767A (en) * | 2011-02-01 | 2012-08-01 | 中研应用感测科技股份有限公司 | Sensing system |
| CN103004978A (en) * | 2012-12-18 | 2013-04-03 | 浙江大学 | Device for realizing emergency function of circular grain drier |
| CN103982413A (en) * | 2014-04-25 | 2014-08-13 | 苏州市计量测试研究所 | On-line energy efficiency detection and evaluation method and system for pumps |
| CN106796752A (en) * | 2014-11-14 | 2017-05-31 | 欧姆龙株式会社 | Measurement apparatus and its control method, managing device and its control method and measuring system |
| CN111915760A (en) * | 2020-08-17 | 2020-11-10 | 深圳市金万兴电线电缆实业有限公司 | Mobile intelligent inspection system for cable equipment |
-
2003
- 2003-07-02 CN CNA031303560A patent/CN1477525A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416618C (en) * | 2006-02-17 | 2008-09-03 | 成兵 | Equipment point-detecting method and system |
| CN102620767A (en) * | 2011-02-01 | 2012-08-01 | 中研应用感测科技股份有限公司 | Sensing system |
| CN103004978A (en) * | 2012-12-18 | 2013-04-03 | 浙江大学 | Device for realizing emergency function of circular grain drier |
| CN103982413A (en) * | 2014-04-25 | 2014-08-13 | 苏州市计量测试研究所 | On-line energy efficiency detection and evaluation method and system for pumps |
| CN106796752A (en) * | 2014-11-14 | 2017-05-31 | 欧姆龙株式会社 | Measurement apparatus and its control method, managing device and its control method and measuring system |
| CN111915760A (en) * | 2020-08-17 | 2020-11-10 | 深圳市金万兴电线电缆实业有限公司 | Mobile intelligent inspection system for cable equipment |
| CN111915760B (en) * | 2020-08-17 | 2021-03-16 | 深圳市金万兴电线电缆实业有限公司 | Mobile intelligent inspection system for cable equipment |
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