CN105758455A - Networking combined-type data collection sensor - Google Patents
Networking combined-type data collection sensor Download PDFInfo
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- CN105758455A CN105758455A CN201610118080.XA CN201610118080A CN105758455A CN 105758455 A CN105758455 A CN 105758455A CN 201610118080 A CN201610118080 A CN 201610118080A CN 105758455 A CN105758455 A CN 105758455A
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Abstract
The invention discloses a networking combined-type data collection sensor, and the sensor comprises a housing. The interior of the housing is provided with an Ethernet circuit unit, a data collection processing chip, and a built-in sensor. The built-in sensor comprises a vibration sensor and a temperature sensor. The vibration sensor is provided with a magnetic absorption seat accessory, and the temperature sensor is wrapped by thermal conduction silicone grease. The Ethernet circuit unit comprises an Ethernet communication circuit unit and an Ethernet power supply circuit unit. One input end of the data collection processing chip is connected with the vibration sensor through an analog signal conditioning circuit, and the other input end of the data collection processing chip is connected with the temperature sensor through an SPI communication link. The output end of the data collection processing chip is connected with the Ethernet communication circuit unit, and the Ethernet communication circuit unit, and the Ethernet power supply circuit unit supplies power to the data collection processing chip and the built-in sensor. The sensor achieves the integration, miniaturization and networking of data collection, greatly simplifies the structure of a product, and reduces the cost of the product.
Description
Technical field
The present invention relates to a kind of data acquisition unit, the combined data particularly relating to a kind of networking gathers sensor.
Background technology
Vibration and temperature monitoring system in the market are all the frameworks that multiple product component combines, namely vibration, temperature sensor and data acquisition unit are three or two independent products, use after connecting combination by signal cable, substantially distributed and centralized two kinds of topological structures can be summarized as, wherein distribution topology framework as it is shown in figure 1, centralized topological structure as shown in Figure 2.Long-term existence before both topological structures, is comply with professional technique professional field law of development, in different industrial automation technology appearance developing period, each with certain suitability, it is possible to meet the requirement of the on-the-spot application of a part.But, along with commercial production regulatory requirement is in change with rapid changepl. never-ending changes and improvements and more and more fierce market competition impact, semiconductor technology and automatic technology develop into when increasingly trending towards adapting to big data monitoring analysis demand, this traditional system architecture form increasingly constrains oneself's expansion of industrial circle application, make vibration, the input of device for detecting temperature can not reach good input-output ratio, the vibration of various application occasions cannot be supported, the standardization replication application of temperature monitoring system, the shortcoming of both system topological frameworks is also more and more obvious, concentrate on following some:
1, the analog signal link of distance can not run on the industry spot that various interference is more and more intensive reliably and with long-term, the Electromagnetic Interference factor that the reliability of signal cable itself and the factor of external world and the increasing various systems of field deployment produce, make to be no matter implementing first to dispose or in follow-up maintenance in order to the working day ensured signal quality as target weighs increasingly, not only add the financial burden of user, and add the workload of user, from this view point, the terminal that can not continue reliably to obtain valid data cannot support big data analysis prolonged application.
2, data acquisition unit and sensor performance mismatch, it is impossible to well cooperate the requirement meeting monitoring of equipment in system level.This is owing to both develop in respective field, in the face of different application demands, the unbalanced state of the technology that defines.Such as: for the index of signal response, for the index of monitoring accuracy, particularly in the industry spot that interference is bigger, mismatch often occurs, it is not only numercal difference, in the definition of physical concept, all can have even difference so that whole system does not have the effect of monitoring equipment.
3, the data throughput capabilities of data acquisition unit, even if having employed Ethernet in the system of centralized architecture and data server connecting, also the continuous propelling movement ability of source data cannot substantial be improved so that the getable data supporting effectiveness of big data system institute is more and more lower.
4, the channel utilization index of data acquisition unit is not high, causes customer investment can exceed demand.Traditional data acquisition unit is often designed as a fixing sensor and accesses quantity, it is common that 4 or 8 or 16.When real field deployment, often owing to the accessible sensor number exceeding data acquisition unit of counting needing monitoring is a little, and must flow through the quantity increasing data acquisition unit and solve, it is also required to increase a data acquisition unit even if increasing a monitoring point.Same situation all can occur when system and original system dilatation on new, user is accomplished by increasing additional investment or overlapping investment, and this situation makes cannot doulbe-sides' victory under the market environment that systems provider and user are more and more higher in equipment control requirement and product competition is day by day fierce.
So that real being connected with big data analysis software system of equipment monitoring apparatus, becoming reliably Monitoring Data source continuously, thus effectively showing the effect of big data analysis, allowing the Monitoring Data of automation equipment service for producing.Therefore, it is necessary available data harvester carries out integrated, miniaturization and networking improvement, not only overcome the weak point that weak and data collection transmission the handling capacity of the long capacity of resisting disturbance of analog signal link in legacy system is low, and reduce the complexity of deployment that in legacy system, multiple product component are brought and maintenance, both reduced the cost of commercialization, and be easy to again user and quickly realize application deployment and follow-up system maintenance.
Summary of the invention
The technical problem to be solved is to provide the combined data of a kind of networking and gathers sensor, it is capable of integrated, miniaturization and the networking of data acquisition unit, it is greatly simplified product structure, reduce product cost, and effectively solve the weak point that in legacy system, the long capacity of resisting disturbance of analog signal link is weak and data collection transmission handling capacity is low.
The present invention solves that above-mentioned technical problem employed technical scheme comprise that and provides the combined data of a kind of networking to gather sensor, including housing, ethernet circuit unit, data acquisition process chip and built-in sensors it is provided with in described housing, wherein, described built-in sensors includes vibrating sensor and temperature sensor, described vibrating sensor is with magnetic absorbing seat accessory, and described temperature sensor is coated with heat-conducting silicone grease；Described ethernet circuit unit includes Ethernet communication circuit unit and POE circuit unit, one input of described data acquisition process chip is connected with vibrating sensor by analog signal conditioner circuit unit, another input is connected with temperature sensor by SPI communication link, the outfan of described data acquisition process chip is connected with Ethernet communication circuit unit, and described POE circuit unit is connected with the power end of data acquisition process chip and built-in sensors respectively.
The combined data of above-mentioned networking gathers sensor, and wherein, the bearing block on described housing is magnetic absorption base, and described temperature sensor is digitized platinum thermal resistance sensor.
The combined data of above-mentioned networking gathers sensor, wherein, described POE circuit unit includes isolating transformer, the side secondary input end of described isolating transformer is connected with bridge rectifier, input 36V～57V DC voltage, two sides of described isolating transformer time outfan is connected with capacitor filtering mu balanced circuit, exports 5V DC voltage.
The combined data of above-mentioned networking gathers sensor, wherein, described Ethernet communication circuit unit includes physical layer transceiver chip, the input of described physical layer transceiver chip is connected to impedance matching circuit and network transformer, and the outfan of described physical layer transceiver chip is connected with data acquisition process chip.
The combined data of above-mentioned networking gathers sensor, wherein, described analog signal conditioner circuit unit includes modulus conversion chip, the input of described modulus conversion chip is connected with vibrating sensor by filter circuit, amplifying circuit, block isolating circuit, and the outfan of described modulus conversion chip is connected with data acquisition process chip by SPI communication link.
The present invention contrasts prior art following beneficial effect: the combined data of networking provided by the invention gathers sensor, it is capable of integrated, miniaturization and the networking of data acquisition unit, it is greatly simplified product structure, reduce product cost, and effectively solve the weak point that in legacy system, the long capacity of resisting disturbance of analog signal link is weak and data collection transmission handling capacity is low.
Accompanying drawing explanation
Fig. 1 is existing distributed data acquisition system schematic diagram；
Fig. 2 is existing centralized data acquisition unit system schematic；
Fig. 3 is the system architecture schematic diagram of the network integration data acquisition unit adopting the present invention；
The combined data that Fig. 4 is inventive network gathers sensor circuit block diagram；
Fig. 5 is the circuitry block schematic diagram of the POE circuit unit of the data acquisition unit of the present invention；
Fig. 6 is the circuitry block schematic diagram of the data communication circuit unit of the data acquisition unit of the present invention；
Fig. 7 is the circuitry block schematic diagram of the analog signal conditioner circuit unit of the data acquisition unit of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Sensor and data acquisition unit are carried out highly integrated and miniaturization, networking a kind of electronic installation by the present invention, it is mainly used in vibration and the temperature monitoring of rotating machinery, is also applied for the application (such as: bridge, steel construction) of some static vibrations monitoring.Apparatus of the present invention are integrated with 1 vibrating sensor and 1 temperature sensor, define 7 kinds of different configuration of products, it is possible to need to form three kinds of monitoring schemes according to actual monitoring: vibration+temperature combined monitoring, single vibration monitoring or single temperature monitoring.Adopt the system architecture of network integration data acquisition unit of the present invention as shown in Figure 3.
Referring to Fig. 4, the combined data of networking provided by the invention gathers sensor and mainly includes such as lower part: 1) POE and data communication circuit unit；2) miniaturized sensors part (comprising vibration, temperature)；3) analog signal conditioner circuit unit and data acquisition process chip.The major function of each circuit unit and being accomplished by
1) POE and data communication part
POE circuit unit (PowerOverEthernet) have employed the circuit design meeting IEEE802.3AF and IEEE802.3AT standard, and compatibility has adapted to application in the network environment using different Ethernet wire rod (4 core netting twines, 8 core netting twines).
By the process through circuit such as bridge rectifier, transformer isolation change-over circuit, capacitor filtering voltage stabilizings of the 48V bias voltage (subject range: 36V～57V) on Ethernet, become 5V direct voltage output, maximum it is output as power 9W, belong to 0 grade power consumption (0.44W～12.95W) device in above-mentioned two standard, as shown in Figure 5.
Ethernet communication circuit unit have employed the Ethernet communication circuit design meeting 802.3 standards, and data communication protocol adopts the TCP/IP communications protocol meeting 802.3 standards, and circuit block diagram is as shown in Figure 6.This circuit design makes the Ethernet data transfer rate of sensor integrated data acquisition device can reach 10/100M self adaptation, fully meets uploading continuously of vibration data and temperature data.
2) miniaturized sensors part (comprising vibration, temperature)
The sensor of miniaturization makes the volume of integral product can be compressed to minimum, and abundant design space can be had to hold multiple functional circuits.This miniaturized sensors comprises vibrating sensing part and temperature sensing portion.
Vibrating sensor have employed piezoelectric ceramics effect technology, the piezoceramics crystal that tri-shear is formed is used to be configured to a piezoelectric element that vibration force all has certain frequency response duration in the X, Y, Z direction, when vibrated, add power on the piezoelectric element to change therewith, coordinate with circuit such as electric charge amplification, filtering again, the ultra-weak electronic signal of piezoelectric element is converted into the voltage signal output with certain biasing, thus by the analog signal conditioner circuit identification of rear end.The vibrating sensing parts of the present invention belong to low-voltage ICP (integrated circuit piezoelectric IntegratedCircuitPiezoelectric) acceleration sensing element, different frequency response range demand according to field monitoring, it is equipped with different sensing elements, 3 kinds of products can be formed.
Conventional vibration sensing element: sensitivity is 100mV/G (10mV/m/s2), response range is 1Hz-10KHz, and amplitude response ranges for +/-40G (+/-400m/s2), it is possible to meet the vibration monitoring requirement of most of rotating machinery of industrial circle.
Low-frequency vibration sensing element: sensitivity is 500mV/G (50mV/m/s2), response range is 0.3Hz-3KHz, and amplitude response ranges for +/-10G (+/-100m/s2), it is possible to meet the vibration monitoring requirement of the Low-speed rotating machinery equipment of industrial circle.
Static vibration sensing element: sensitivity is 40mV/G (4mV/m/s2), response range is 0Hz～1KHz, and amplitude response ranges for +/-20G (+/-200m/s2), it is possible to meet the vibration monitoring requirement of the static device of industrial circle and the static structure of building field.
The rigidity that the transmission of vibration force is the exterior mechanical parts by this device realizes.The structural vibration of device interior can be delivered to device housings surface by the rigid attachment of bearing shaft bearing, only need to install this device at corresponding position, by the base with connecting bolt, can vibration force be delivered on vibrating sensing parts.This base has two kinds of installation forms, and one is that another kind is to pass through magnetic absorption by being welded to equipment surface.Generally under the premise carrying out effectively monitoring, magnetic bases can be selected to facilitate enforcement to dispose.Both installation forms all meet ISO vibration-testing standard.
Temperature sensing component have employed Miniature digital platinum resistance thermometer sensor, thermometry, it is achieved the temperature monitoring of high accuracy and fast and stable.Temperature monitoring ranges for-40～85 DEG C, and resolution is less than 0.1 DEG C, and precision is +/-0.5 DEG C, and signals collecting refresh time is 85ms.By vibrating the matched combined different with temperature sensing component, monitoring products configuration as shown in table 1 can be formed, fully meet field monitoring demand.
| Sequence number | Monitoring products configuration |
| 1 | Conventional vibration is monitored |
| 2 | Conventional vibration monitoring+temperature monitoring |
| 3 | Low-frequency vibration is monitored |
| 4 | Low-frequency vibration monitoring+temperature monitoring |
| 5 | Static vibration is monitored |
| 6 | Static vibration monitoring+temperature monitoring |
| 7 | Temperature monitoring |
Table 1
The transmission of temperature is by there being the metal parts of thermal conductive resin to realize, and is equipped with heat-conducting silicone grease encirclement temperature sensing component, to improve heat transfer efficiency between metal parts and temperature sensing component.Temperature signal is direct digitization output, and therefore data acquisition process chip only needs to carry out SPI interface data communication with sensing element and can obtain Monitoring Data.Data acquisition process chip often obtains 10 temperature monitoring data and namely carries out once average, to eliminate the impact on whole monitoring data of the unreasonable collection signal of abnormal sudden change.Every 10 thermometric sample means are as temperature monitoring data, and refresh rate can reach 1 second 1 data, it is possible to meet the temperature monitoring demand of major part industrial circle
3) analog signal conditioner circuit unit and data acquisition process chip
The primary signal of vibration and temperature sensing component output needs through special signal processing, the data that the monitoring application that just can be supported after processing including hardware conditioning conversion and computed in software is required.Vibration signal need to be processed by block isolating circuit, amplifying circuit, filter circuit, integrating circuit, modulus conversion chip (data acquisition) etc., and circuit block diagram is as shown in Figure 7.The major function of each circuit is as follows:
Namely block isolating circuit ends direct current signal, allows AC signal pass through.For conventional and low-frequency vibration monitoring sensing element, its output signal active ingredient is exchange.It is thus desirable to block isolating circuit comes into force, it is designed as 0.15Hz.In static vibration monitoring application, then by program control, block isolating circuit is bypassed so that the direct current signal that sensing element produces also can be collected.
Primary amplifying circuit: here for first order amplifying circuit, carrying out circuit design with operational amplifier, amplification is 2.Small-signal for sensing element carries out a primary amplification, in order to follow-up signal condition can carry out effectively filtering, noise reduction, integration.
Vibration acceleration signal acquisition process circuit: include the first high-pass filtering circuit, the first programmable amplifying circuit and the first program control low-pass filter circuit that are sequentially connected.The primary signal of vibrating sensing parts output is acceleration force signal, therefore, only need to screen the signal of suitable frequency band according to monitoring requirements and be acquired.The screening of signal frequency section is then undertaken by high-pass filtering and low-pass filtering.High-pass filtering is designed as 5Hz, acceleration signal monitoring requirements working speed under different to meet industry spot major part rotating machinery.The optional frequency point ranges of program control low-pass filtering design is 10KHz, 5KHz, 3.2KHz, 2KHz, 1KHz, the characteristic that acceleration signal responds for high-frequency signal is given full play to, it is possible to monitor equipment bearing, the early defect signal of gear and equipment and loosen the signal of early stage.The design of programmable amplifying circuit makes monitored signal be at the signal resolution amplitude range of the best when being input to modulus conversion chip, thus improving signal sampling precision.The programming amplifying multiple of vibration acceleration signal is 1,2,4,8.
Vibration velocity signal acquisition processing circuit: include the integrating circuit, the second programmable amplifying circuit and the second program control low-pass filter circuit that are sequentially connected.Vibration velocity signal is obtained by hardware Integral Transformation by vibration acceleration signal.Hardware integrating circuit calculates the advantage compared and is in that signal is truly stable with Software Integration, the frequency response speed and resolution of signal can be accomplished quick and precisely, and Integral Transformation will not be cannot be carried out obtain rate signal because the low frequency signal even frequency of direct current signal are of a sufficiently low.This is also that this monitoring device is with signal quality for the primary consideration ensured.The high-pass filtering of vibration velocity signal is designed as 1Hz, rate signal monitoring requirements working speed under different to meet industry spot major part rotating machinery.The optional frequency point ranges of program control low-pass filtering design is 3.2KHz, 2KHz, 1KHz, the characteristic that rate signal responds for low frequency and intermediate-freuqncy signal is given full play to, it is possible to the vibration signal occupying absolute ratio in equipment body vibration earthquake intensity is made and monitors accurately.This is also the ISO10816 reason that rate signal is classified as evaluation criterion parameter.The programming amplifying multiple of vibration velocity signal is 1,2,4,8.
Vibration displacement signal acquisition processing circuit: include the quadratic integral circuit, the 3rd programmable amplifying circuit and the 3rd program control low-pass filter circuit that are sequentially connected, the input of described quadratic integral circuit and the outfan of the second high-pass filtering circuit and be connected.Vibration displacement signal is obtained by hardware Integral Transformation by vibration velocity signal.The optional frequency point ranges of the program control low-pass filtering design of vibration displacement signal is 500Hz, 200Hz, 100Hz so that the characteristic that displacement signal responds for low frequency signal is given full play to, it is possible to monitor the axle system of equipment and the early defect signal of the vibration of foundation.This is also the ISO10816 reason that displacement signal is classified as evaluation criterion parameter.The programming amplifying multiple of vibration displacement signal is 1,2,5,10.Because displacement signal is all low frequency signal in most cases, being the very small signal of amplitude, therefore its programming amplifying needs specific rate signal and acceleration signal to need higher amplification.
Modulus conversion chip: being responsible for signals collecting, the data of analog digital conversion are 24 bit binary data, the figure place of effectively differentiating of voltage signal is 20, is about 9.537uV so that the precision of small-signal monitoring is greatly improved.According to the sensitivity that vibrating sensing parts are different, it can be deduced that acceleration force signal resolution comparison as shown in table 2.
| Conventional vibration sensing element | 10mV/m/s2 | 0.0009537m/s2 |
| Low-frequency vibration sensing element | 50mV/m/s2 | 0.00019074m/s2 |
| Static vibration sensing element | 4mV/m/s2 | 0.00238425m/s2 |
Table 2
Vibration signal becomes digital signal through analog digital conversion, is transferred to processor chips again through SPI communication interface.The data sampling rate of its communication speed and modulus conversion chip is directly proportional, high-frequency signal is effectively monitored, sample rate necessarily be greater than at least 2.56 times (meeting Sampling Theorem) of signal frequency, so the message transmission rate of SPI communication interface also must be significantly high, the data gathered could be given in quickly and be given to processor chips, to ensure that sampling can effectively carry out next time.
For the collection of different vibration signals, not only having sample rate needs to select, in addition it is also necessary to select collected data length (namely the unitary sampling of effectively monitoring needs how many data volumes).The two sampling parameter directly determines the quality of data, and the video signal like normal quality is compared with high-definition video signal, and one fixes on and has very big difference on the sample rate of data and data length.Quality data sampling can be carried out, just reflect the quality of data acquisition unit.The sampling parameter that apparatus of the present invention support is as shown in table 3.
Table 3
The value that arranges that sample rate is according to program control low-pass filtering (monitored signal frequency bandwidth) is multiplied by 2.56 and draws (signal sampling must meet Sampling Theorem), therefore unlike signal classification is just corresponding different sampling parameter, such as: 12800 sample rates are to be served only for acceleration signal monitoring, because the monitored signal frequency bandwidth of its correspondence is 5KHz.
The both mechanically and electrically technology having common factor is integrated by the present invention, it is subsequently adding in the two traditional field the technology not being employed, thus producing new integration product form, being aided with data management analysis software, forming vibration and the temperature monitoring system of novel networking.The present invention not only meets the application requirement on market with the conventional vibration in indication range, temperature monitoring system, this type of system has been accomplished integrated, miniaturization and networking simultaneously, not only overcome the weak point that weak and data collection transmission the handling capacity of the long capacity of resisting disturbance of analog signal link in legacy system is low, and reduce the complexity of deployment that in legacy system, multiple product component are brought and maintenance, both reduced the cost of commercialization, and be easy to again user and quickly realize application deployment and follow-up system maintenance.Assembly of the invention, in the process eliminating or improving many conventional vibration, temperature sensor and conventional vibration, temperature data acquisition device product defects, has gradually formed self distinctive advantage.Major advantage is as follows:
1) congenerous product scope inner height is integrated and miniaturization, and application scenario space constraint is low
Incorporate vibration, temperature sensing component sum adopts function, and it is probably the vibration temperature combined monitoring system and device being applied to industrial circle of smallest, overall volume is about 48 (length) x42 (width) x36 (height) mm, and weight is less than 110 grams.Small size makes the volume of product and traditional vibration acceleration sensor suitable, is fully able to the space constraint adapting to conventional vibration acceleration transducer mounting location.Thus under the premise that original applied environment is not changed, adding several device for picking, the advantage of the low requirement in application space is showed fully.
2) dispose lower monitoring utilization ratio of device with application the highest, invest without redundant system
Have been previously mentioned the sensor of traditional number device for picking to access quantity and be often designed as a bigger fixed value, for instance 4,8,16,32 so that the design that on-the-spot application is disposed always can not reach making the best use of everything just, always has unnecessary number to adopt passage and is wasted.Vibration monitoring passage and the temperature monitoring number of channels of apparatus of the present invention configuration are 1, in conjunction with the configuration of different sensing elements, allow for that field deployment is certain mates completely with actual monitoring demand, will not allow the investment that user effort is unnecessary.
3) sensing element output analogue signal minimum interference, it is ensured that signal monitoring accuracy
Traditional vibration monitor system, all need by signal cable, the output signal (analogue signal) of sensor is transferred to several device for picking, and the transmission range of signal cable is generally individually more than 2 meters, even up to 30 meters, the primary signal that sensor exports is made to be highly susceptible to the various interference effects of site environment, it it is not only the Electromagnetic Interference that sends of miscellaneous equipment, also have the interference that the environmental change residing for the signal cable pipeline brought due to overhaul of the equipments etc. causes, for instance: water, oil, corrosive gas, high temperature, low temperature etc..Apparatus of the present invention are by after integrated for sensing element sum device for picking, and this section of analogue signal is at interiors of products, and its length is also just at 2 centimetres, and is protected by product casing, can ignore the impact of external disturbance completely.Ensure that the quality of primary signal, also ensure that the accuracy of signal monitoring.
4) field deployment enforcement and maintenance work are the easiest, only need system integrating, without special deployment request.
Due to apparatus of the present invention be same as conventional vibration, temperature sensor is directly mounted to device housings surface, and the signal cable drawn is exactly network cable, network cable only need to be linked into the port of the other router with POE function of equipment or switch, and therefore the deployment of native system is just as disposing a local area ethernet network on equipment side.Special installation is not had to implement technical need so that the field deployment of this device very simple and easy.Uniquely can calculate and be contemplated to long-distance data transmission for complicated project content and need the fiber cable laying carried out, but corresponding engineering also becomes the standard technique of electrically installation already.
Although the present invention discloses as above with preferred embodiment; so it is not limited to the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is when with being as the criterion that claims define.
Claims (5)
1. the combined data of a networking gathers sensor, including housing, ethernet circuit unit, data acquisition process chip and built-in sensors it is provided with in described housing, it is characterized in that, described built-in sensors includes vibrating sensor and temperature sensor, described vibrating sensor is with magnetic absorbing seat accessory, and described temperature sensor is coated with heat-conducting silicone grease；Described ethernet circuit unit includes Ethernet communication circuit unit and POE circuit unit, one input of described data acquisition process chip is connected with vibrating sensor by analog signal conditioner circuit unit, another input is connected with temperature sensor by SPI communication link, the outfan of described data acquisition process chip is connected with Ethernet communication circuit unit, and described POE circuit unit is connected with the power end of data acquisition process chip and built-in sensors respectively.
2. the combined data of networking as claimed in claim 1 gathers sensor, it is characterised in that described temperature sensor is digitized platinum thermal resistance sensor.
3. the combined data of networking as claimed in claim 1 gathers sensor, it is characterized in that, described POE circuit unit includes isolating transformer, the side secondary input end of described isolating transformer is connected with bridge rectifier, input 36V～57V DC voltage, two sides of described isolating transformer time outfan is connected with capacitor filtering mu balanced circuit, exports 5V DC voltage.
4. the combined data of networking as claimed in claim 1 gathers sensor, it is characterized in that, described Ethernet communication circuit unit includes physical layer transceiver chip, the input of described physical layer transceiver chip is connected to impedance matching circuit and network transformer, and the outfan of described physical layer transceiver chip is connected with data acquisition process chip.
5. the combined data of networking as claimed in claim 1 gathers sensor, it is characterized in that, described analog signal conditioner circuit unit includes modulus conversion chip, the input of described modulus conversion chip is connected with vibrating sensor by filter circuit, amplifying circuit, block isolating circuit, and the outfan of described modulus conversion chip is connected with data acquisition process chip by SPI communication link.
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| CN110460450A (en) * | 2019-08-19 | 2019-11-15 | 深圳坚朗海贝斯智能科技有限公司 | A kind of interchanger for supporting low-voltage wired to network |
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