CN213338365U - External acquisition system for sensor data - Google Patents
External acquisition system for sensor data Download PDFInfo
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- CN213338365U CN213338365U CN202022081290.0U CN202022081290U CN213338365U CN 213338365 U CN213338365 U CN 213338365U CN 202022081290 U CN202022081290 U CN 202022081290U CN 213338365 U CN213338365 U CN 213338365U
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Abstract
The utility model discloses a sensor data external acquisition system relates to sensor data acquisition technical field, including from the controller, two at least DAC converting circuit, main control unit, communication module and high in the clouds, from the controller connection sensor, acquire the analog quantity signal of the sensor of the same kind and convert it into two tunnel digital quantity signals through analog-to-digital converter, the slave controller is connected respectively to the input of first DAC converting circuit and second DAC converting circuit, main control unit, communication module and high in the clouds are connected in proper order to the output of first DAC converting circuit, the output connecting device of second DAC converting circuit, sensor connecting device and collection equipment data; two DAC converting circuit respectively with two routes digital quantity signal respectively convert one way current signal into, the high in the clouds is handled the current signal and is obtained the optimization scheme of equipment, and the second DAC converting circuit returns the current signal for equipment, and this system acquires sensor data in real time, establishes the basis for the high in the clouds formulation optimization scheme.
Description
Technical Field
The utility model belongs to the technical field of sensor data acquisition technique and specifically relates to an outside collection system of sensor data.
Background
At present, an energy-saving and intelligent optimization scheme for client machine equipment needs to be carried out, operation data of a sensor of the client machine equipment needs to be obtained, a client generally adopts oral statement and partial report forms for providing according to experience, certain deviation, missing report and other conditions exist in the data transmission process, if the optimization scheme made by adopting wrong data is failed, if a technician collects the sensor data at a squat point on site, the time and labor cost are high, the convenience and the real-time performance are poor, and therefore an external sensor data collection system is produced.
SUMMERY OF THE UTILITY MODEL
The present inventors have developed an external sensor data acquisition system that addresses the above-mentioned problems and needs. The system divides sensor data into two parts, one part of the sensor data is provided to the cloud end in real time to be subjected to data processing to obtain an optimization scheme of the equipment, and the other part of the sensor data is returned to the equipment, so that the normal use of the equipment is not influenced.
The technical scheme of the utility model as follows:
an external sensor data acquisition system comprises an acquisition module, a master controller, a communication module and a cloud end, wherein the acquisition module comprises a slave controller and at least two DAC (digital-to-analog converter) conversion circuits, the slave controller is used as an external input end of the system to be connected with a sensor and used for acquiring one path of analog quantity signals of the sensor and converting the analog quantity signals into two paths of digital quantity signals through an analog-to-digital converter, the input end of a first DAC conversion circuit is connected with the slave controller, the output end of the first DAC conversion circuit is sequentially connected with the master controller, the communication module and the cloud end, the input end of a second DAC conversion circuit is connected with the slave controller, the output end of the second DAC conversion circuit is used as an;
the first DAC conversion circuit and the second DAC conversion circuit respectively convert the two paths of digital quantity signals into one path of current signals, the cloud end processes the current signals to obtain an optimization scheme of the equipment, and the second DAC conversion circuit returns the current signals to the equipment.
The further technical scheme is that the first DAC conversion circuit and the second DAC conversion circuit have the same circuit structure and respectively comprise three optocouplers, a digital-to-analog converter, two operational amplifiers and a triode;
the cathode of each optical coupling light emitter is respectively connected with the data end, the clock end or the level trigger control end of the slave controller through a first resistor, the anode of each optical coupling light emitter is connected with a first power supply, the collector of each optical coupling light receiver is connected with a second power supply through a second resistor, the collector of each optical coupling light receiver is also respectively and correspondingly connected with the data input end, the clock input end or the level trigger control input end of the digital-to-analog converter, the emitter of each optical coupling light receiver is grounded, the analog output end of the digital-to-analog converter is sequentially connected with the in-phase input end of the first operational amplifier through a third resistor and a fourth resistor, the output end of the first operational amplifier is sequentially grounded through a fifth resistor and a sixth resistor, the inverting input end of the first operational amplifier is connected with the common end of the fifth resistor and the sixth resistor, and the output end of the first operational amplifier is further, the inverting input end of the second operational amplifier is grounded through an eighth resistor, the output end of the second operational amplifier is connected with the common end of the seventh resistor and the second operational amplifier sequentially through a ninth resistor, a tenth resistor and an eleventh resistor, the output end of the second operational amplifier is further connected with the base level of the triode through a twelfth resistor, the inverting input end of the second operational amplifier is connected with the common end of the ninth resistor and the tenth resistor and then is connected with the emitter of the triode through a thirteenth resistor, the first capacitor is connected in parallel with two ends of the thirteenth resistor, the emitter of the triode is further connected with the common end of the tenth resistor and the eleventh resistor, one end of the second capacitor, one end of the TVS diode and one end of the thermistor respectively through a fourteenth resistor, the other end of the second capacitor and the other end of the TVS diode are grounded, and the other end of the thermistor is used as a current signal positive output end of the first DAC converting circuit or the second DAC converting circuit and is connected with a controller or, the other end of the TVS diode is also used as a current signal negative output end of the first DAC conversion circuit or the second DAC conversion circuit to be connected with a main controller or equipment;
each path of digital quantity signal outputs a current signal of 4-20mA after passing through the first DAC conversion circuit or the second DAC conversion circuit.
According to a further technical scheme, when various sensor data need to be collected, the system comprises a plurality of collection modules, each collection module is correspondingly connected with one sensor and corresponding equipment, the main controller is connected with each collection module, and each slave controller is trained through a modbus-rtu protocol master cycle.
The further technical scheme is that the cloud end completes the optimization instruction through the remote control device from the controller.
The further technical scheme is that the master controller and the slave controller are realized based on an STM32F407VGT6 chip; the analog-to-digital converter is realized based on a TM7705 model;
the communication module is realized by a 4g communication module or an NB-IOT communication module;
the optocoupler is realized based on an LTV816STA1D3G model, the digital-to-analog converter is realized based on a TPC116S1 model, the first operational amplifier and the second operational amplifier are realized based on an LM2904 model, and the TVS diode is realized based on an SMBJ33CA model.
The utility model has the beneficial technical effects that:
the data external acquisition system is connected with a sensor, an analog quantity signal of the sensor is converted into a digital quantity signal and is divided into two parts, the two parts are converted into 4-20mA current signals through a DAC (digital-to-analog converter) conversion circuit respectively, one part of 4-20mA current signal which does not affect the operation of the original equipment is connected to the original equipment, the other part of the current signal is used by the system and is transmitted to the cloud end through a main controller and a communication module, so that the problems of on-site squatting points and inaccurate data feedback are solved, the data external acquisition system can acquire sensor data in real time, all-weather fluctuation changes of the sensor data are realized, a foundation is laid for subsequently formulating an energy-saving optimization scheme, the cloud end also completes an optimization instruction through a slave controller remote control device according to the optimization scheme, and when various sensor data are required to be acquired, a plurality of acquisition modules, by each slave controller of master controller through modbus-rtu agreement initiative round training for multiple data acquisition is independent separately and receive the control of high in the clouds and master controller, makes things convenient for data classification.
Drawings
FIG. 1 is a functional block diagram of an external acquisition system for sensor data provided herein.
FIG. 2 is a chip pin diagram of a slave controller as provided herein.
Fig. 3 is a circuit diagram of a DAC conversion circuit provided in the present application.
Detailed Description
The following describes the embodiments of the present invention with reference to the accompanying drawings.
The application discloses a sensor data external acquisition system, a schematic block diagram of which is shown in fig. 1, and the system comprises an acquisition module, a master controller, a communication module and a cloud end, wherein the acquisition module comprises a slave controller and at least two DAC (digital-to-analog converter) conversion circuits, the master controller and the slave controller are both realized based on an STM32F407VGT6 chip, and a chip pin diagram of the slave controller is shown in fig. 2; the communication module is realized by adopting a 4g communication module or an NB-IOT communication module, the 4g communication module is preferentially adopted when the data acquisition frequency is higher, the real-time requirement is stronger and the power supply condition is met, and the NB-IOT communication module is preferentially adopted when the data acquisition frequency requirement is not high and the power supply condition cannot be met in the field environment. The slave controller is used as an external input end of the system and is connected with the sensor, and is used for acquiring one path of analog quantity signals of the sensor and converting the analog quantity signals into two paths of digital quantity signals through a digital-to-analog converter, wherein the digital-to-analog converter is realized based on the model of TPC116S 1. Optionally, when the system needs to collect n analog quantity signals of a certain sensor, the number of the DAC conversion circuits needs to be increased to 2n adaptively. The input end of the first DAC conversion circuit is connected with the slave controller, the output end of the first DAC conversion circuit is sequentially connected with the master controller, the communication module and the cloud end, the input end of the second DAC conversion circuit is connected with the slave controller, the output end of the second DAC conversion circuit serves as the external output end connection device of the system, and the sensor is connected with the device and collects device data.
The first DAC conversion circuit and the second DAC conversion circuit respectively convert the two paths of digital quantity signals into one path of current signals, the cloud end processes the current signals to obtain an optimization scheme of the equipment, and the second DAC conversion circuit returns the current signals to the equipment.
The first DAC conversion circuit and the second DAC conversion circuit have the same circuit structure, and the circuit diagram thereof is shown in fig. 3, and each of the first DAC conversion circuit and the second DAC conversion circuit includes three optocouplers U1, a digital-to-analog converter U2, two operational amplifiers, and a transistor Q1.
The cathode of each optocoupler U1 light emitter is respectively connected with a data terminal AO _ DIN, a clock terminal AO _ SCLK or a level trigger control terminal AO _ SYNC1 of the slave controller through a first resistor R1, the anode of each optocoupler U1 light emitter is connected with a first power supply +3.3V, the collector of each optocoupler U1 light receiver is connected with a second power supply +5V through a second resistor R2, the collector of each optocoupler U1 light receiver is also respectively and correspondingly connected with a data input terminal pin 7, a clock input terminal pin 6 or a level trigger control input terminal pin 5 of a digital-to-analog converter U2, the emitter of each optocoupler U1 light receiver is grounded, an analog output terminal pin 4 of the digital-to-analog converter U2 is connected with the non-inverting input terminal of the first operational amplifier UA through a third resistor R3 and a fourth resistor R4 in sequence, the output terminal of the first operational amplifier UA is connected with the inverting input terminal of the fifth resistor R5 and the sixth resistor R6 in sequence, the inverting input terminal of the first operational amplifier UA is connected with, the output end of the first operational amplifier UA is also connected with the non-inverting input end of a second operational amplifier UB through a seventh resistor R7, the inverting input end of the second operational amplifier UB is grounded through an eighth resistor R8, the output end of the second operational amplifier UB is connected with the common end of a seventh resistor R7 and the second operational amplifier UB through a ninth resistor R9, a tenth resistor R10 and an eleventh resistor R11 in sequence, the output end of the second operational amplifier UB is also connected with the base stage of a triode Q1 through a twelfth resistor R12, the inverting input end of the second operational amplifier UB is connected with the common end of a ninth resistor R9 and a tenth resistor R10 and then is connected with the emitter of a triode Q1 through a thirteenth resistor R13, the emitter of the first capacitor C1 is connected in parallel with the two ends of a thirteenth resistor R13, the emitter of the triode Q1 is also connected with the common end of a tenth resistor R10 and an eleventh resistor R11 through a fourteenth resistor R14, the common end of a second capacitor C68642, a resistor VD1 at one end of a TVF 1 and a TVF 1 at, the other end of the second capacitor C2 and the other end of the TVS diode VD1 are grounded, the other end of the thermistor F1 is used as a current signal positive output end of the first DAC converting circuit or the second DAC converting circuit to be connected with a main controller or equipment, and the other end of the TVS diode VD1 is also used as a current signal negative output end of the first DAC converting circuit or the second DAC converting circuit to be connected with the main controller or equipment.
Each path of digital quantity signal outputs a current signal of 4-20mA after passing through the first DAC conversion circuit or the second DAC conversion circuit.
Optionally, the optocoupler U1 is implemented based on the LTV816STA1D3G model, the digital-to-analog converter U2 is implemented based on the TPC116S1 model, the first operational amplifier UA and the second operational amplifier UB are implemented based on the LM2904 model, and the TVS diode VD1 is implemented based on the SMBJ33CA model.
Optionally, when multiple sensor data need to be collected, the system comprises a plurality of collection modules, each collection module is correspondingly connected with one sensor and corresponding equipment, the main controller is connected with each collection module and trains each slave controller in a master round through a modbus-rtu protocol, so that multiple data collection is independent and controlled by the cloud and the main controller, and data classification is facilitated.
Optionally, the cloud completes the optimization instruction through the slave controller remote control device.
For example, the data external acquisition system of the application is connected to a temperature sensor of a bromine cooler, the data external acquisition system converts a temperature analog quantity signal of the temperature sensor into a digital quantity signal and divides the digital quantity signal into two parts, then converts the digital quantity signal into a current signal of 4-20mA through a DAC (digital-to-analog converter) conversion circuit respectively, one part of the current signal of 4-20mA is connected to the bromine cooler without influencing the operation of the original equipment, the other part of the current signal is used by the system and is transmitted to a cloud end through a main controller and a communication module, the cloud end acquires the temperature data of the bromine cooler acquired by the temperature sensor in real time within a preset time, if the temperature data of the temperature sensor within three days is acquired, an energy-saving optimization scheme of the bromine cooler is formulated according to the peak and trough analysis of the temperature data, so that the problems of on-site squat point and inaccurate, and a foundation is laid for the subsequent formulation of an energy-saving optimization scheme.
What has been described above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and scope of the present invention are to be considered as included within the scope of the present invention.
Claims (5)
1. An external sensor data acquisition system is characterized by comprising an acquisition module, a master controller, a communication module and a cloud end, wherein the acquisition module comprises a slave controller and at least two DAC (digital-to-analog converter) conversion circuits, the slave controller is used as an external input end of the system to be connected with a sensor and used for acquiring one-path analog quantity signal of the sensor and converting the one-path analog quantity signal into two-path digital quantity signals through an analog-to-digital converter, the input end of a first DAC conversion circuit is connected with the slave controller, the output end of the first DAC conversion circuit is sequentially connected with the master controller, the communication module and the cloud end, the input end of a second DAC conversion circuit is connected with the slave controller, the output end of the second DAC conversion circuit is used as an external output end of the system to be connected with;
the first DAC conversion circuit and the second DAC conversion circuit respectively convert the two paths of digital quantity signals into one path of current signals, the cloud end processes the current signals to obtain an optimization scheme of the equipment, and the second DAC conversion circuit returns the current signals to the equipment.
2. The external sensor data acquisition system according to claim 1, wherein the first DAC conversion circuit and the second DAC conversion circuit have the same circuit structure and each include three opto-couplers, a digital-to-analog converter, two operational amplifiers and a triode;
the cathode of each optical coupling light emitter is connected with the data end, the clock end or the level trigger control end of the slave controller through a first resistor, the anode of each optical coupling light emitter is connected with a first power supply, the collector of each optical coupling light receiver is connected with a second power supply through a second resistor, the collector of each optical coupling light receiver is also correspondingly connected with the data input end, the clock input end or the level trigger control input end of the digital-to-analog converter, the emitter of each optical coupling light receiver is grounded, the analog output end of the digital-to-analog converter is connected with the in-phase input end of the first operational amplifier through a third resistor and a fourth resistor in sequence, the output end of the first operational amplifier is grounded through a fifth resistor and a sixth resistor in sequence, the reverse phase input end of the first operational amplifier is connected with the common end of the fifth resistor and the sixth resistor, and the output end of the first operational amplifier is connected with the in-phase input end of the second, the inverting input end of the second operational amplifier is grounded through an eighth resistor, the output end of the second operational amplifier is connected with the common end of the seventh resistor and the second operational amplifier sequentially through a ninth resistor, a tenth resistor and an eleventh resistor, the output end of the second operational amplifier is further connected with the base level of the triode through a twelfth resistor, the inverting input end of the second operational amplifier is connected with the common end of the ninth resistor and the tenth resistor and then connected with the emitter of the triode through a thirteenth resistor, the first capacitor is connected with the two ends of the thirteenth resistor in parallel, the emitter of the triode is further connected with the common end of the tenth resistor and the eleventh resistor, one end of the second capacitor, one end of the TVS diode and one end of the thermistor respectively through a fourteenth resistor, the other end of the second capacitor and the other end of the TVS diode are grounded, and the other end of the thermistor is used as the current signal positive output end of the first DAC conversion circuit or the second DAC conversion circuit to be connected with the base level The other end of the TVS diode is also used as a current signal negative output end of the first DAC converting circuit or the second DAC converting circuit to be connected with the main controller or equipment;
and each path of digital quantity signal outputs a 4-20mA current signal after passing through the first DAC conversion circuit or the second DAC conversion circuit.
3. The external sensor data acquisition system according to claim 1 or 2, wherein when a plurality of sensor data are required to be acquired, the system comprises a plurality of acquisition modules, each acquisition module is correspondingly connected with one sensor and corresponding equipment thereof, the master controller is connected with each acquisition module and trains each slave controller in a master round through a modbus-rtu protocol.
4. The external sensor data acquisition system of claim 1 wherein the cloud remotely controls the device through the slave controller to perform optimization instructions.
5. The external sensor data acquisition system of claim 2, wherein the master controller and the slave controller are implemented based on an STM32F407VGT6 chip; the analog-to-digital converter is realized based on a TM7705 model;
the communication module is realized by adopting a 4g communication module or an NB-IOT communication module;
the opto-coupler is realized based on LTV816STA1D3G model, the digital-to-analog converter is realized based on TPC116S1 model, first operational amplifier and second operational amplifier are realized based on LM2904 model, the TVS diode is realized based on SMBJ33CA model.
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| CN202022081290.0U CN213338365U (en) | 2020-09-21 | 2020-09-21 | External acquisition system for sensor data |
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| CN202022081290.0U CN213338365U (en) | 2020-09-21 | 2020-09-21 | External acquisition system for sensor data |
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