CN211741407U - General type intelligence multichannel voltage acquisition appearance - Google Patents
General type intelligence multichannel voltage acquisition appearance Download PDFInfo
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- CN211741407U CN211741407U CN201922235404.XU CN201922235404U CN211741407U CN 211741407 U CN211741407 U CN 211741407U CN 201922235404 U CN201922235404 U CN 201922235404U CN 211741407 U CN211741407 U CN 211741407U
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Abstract
The utility model discloses a general intelligent multi-channel voltage acquisition instrument, which comprises a processor, an acquisition circuit and a power supply module; the processor MCU is in data connection with other modules of the voltage acquisition instrument and is used for executing data acquisition, data operation, communication and storage functions and controlling the other modules of the voltage acquisition instrument to work; the acquisition circuit comprises an analog-to-digital converter, a filter and a measurement interface which are connected in sequence; the number of the filters is the same as that of the measuring interfaces; an amplifier is additionally arranged between part of the filter and the analog-to-digital converter; PGA is integrated in the analog-to-digital converter; the measurement interface is connected with a voltage sensor to be measured; the power supply module comprises a digital power supply module for supplying power to the acquisition circuit, provides various reference voltages, and accesses different voltages into the analog-to-digital converter by selection during use. The utility model discloses can cross the suitability that provides multiple reference voltage and variable gain and increased the collection appearance, its measuring range can be followed small voltage to volt level voltage, therefore application scope ten minutes extensively.
Description
Technical Field
The utility model belongs to the sensor field, in particular to general type intelligence multichannel voltage acquisition appearance.
Background
Measurement accuracy is one of the important index of collection appearance, and present voltage signal collection appearance most all can satisfy the demand of precision, but most voltage signal collection appearance and sensor (the voltage signal generator who needs to measure) all are supporting uses, though accomplish the multichannel measurement, but cause very big inconvenience, just that this kind of sensor can only join in marriage this kind of collection appearance, so, collection appearance's commonality is just very poor. In addition, most voltage acquisition instruments on the market are in wired communication, and the installation is troublesome in some outdoor places, such as what to pull wires; in general, most voltage signal acquisition instruments are installed and used indoors, and no safety protection measures are set. Thus, the applicability is poor. Therefore, a new voltage collecting instrument with strong universality and wide applicability is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome prior art's shortcoming and not enough, provide a general type intelligence multichannel voltage acquisition instrument that high accuracy, commonality and suitability are strong.
The purpose of the utility model is realized through the following technical scheme: a general intelligent multi-channel voltage acquisition instrument comprises a processor, an acquisition circuit and a power supply module;
the processor MCU is in data connection with other modules of the voltage acquisition instrument and is used for executing data acquisition, data operation, communication and storage functions and controlling the other modules of the voltage acquisition instrument to work;
the acquisition circuit comprises an analog-to-digital converter, a filter and a measurement interface which are connected in sequence; the number of the filters is the same as that of the measuring interfaces; an amplifier is additionally arranged between part of the filter and the analog-to-digital converter; PGA is integrated in the analog-to-digital converter;
the measurement interface is connected with a voltage sensor to be measured;
the power supply module comprises a digital power supply module for supplying power to the acquisition circuit, provides various reference voltages, and accesses different voltages into the analog-to-digital converter by selection during use.
Preferably, the power supply module further comprises an analog power supply module for supplying power to the sensor, the analog power supply module provides multiple power supply voltages, and different voltages are selectively connected to the sensor through the measurement interface when the analog power supply module is used; the analog power supply module and the digital power supply module are supplied with power separately, and a single-point grounding is used at the grounding position.
Preferably, the voltage acquisition instrument further comprises a wireless communication module, a LoRa protocol is arranged in the wireless communication module, and the plurality of acquisition instruments form a self-organizing star network structure through the wireless communication module.
Preferably, the power source of the power supply module is a rechargeable battery, and the rechargeable battery is connected with the protection circuit and then is connected to the module of the acquisition instrument, which needs to be powered.
Furthermore, the protection circuit comprises an anti-explosion device, a piezoresistor, a TVS diode and a common-mode inductor which are connected in sequence.
Furthermore, the voltage acquisition instrument further comprises a battery electric energy measuring module which is in data connection with the processor and is used for measuring the voltage of the battery and converting the voltage into the residual electric quantity of the battery.
Preferably, the processor MCU and the acquisition circuit can be switched into a sleep state, and are in the sleep state during non-acquisition time.
Preferably, the processor MCU is connected with the upper computer through a wired communication module, and a protection circuit is additionally arranged between the processor MCU and the upper computer.
Furthermore, the wired communication module communicates with an RS-485 bus protocol.
Preferably, the measurement interface is an interface adaptable to two-wire, three-wire, four-wire and five-wire.
Preferably, the analog-to-digital converter is a 24-bit high-precision A/D converter.
Preferably, the reference voltage includes three of 2.048V, 3.3V and 5.0V.
Preferably, the voltage acquisition instrument further comprises a temperature compensation module which is a temperature sensor in data connection with the processor.
Preferably, the voltage collector further comprises a memory for storing the collected data converted by the analog-to-digital converter.
Preferably, all modules of the voltage acquisition instrument are integrated in a waterproof aluminum shell.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the utility model increases the applicability of the acquisition instrument by providing various reference voltages and variable gains, and the measurement range can be from micro voltage to voltage level (which includes most voltage output type sensors on the market), so the application range is very wide;
2. the utility model adds a protection circuit to prevent lightning stroke, static electricity, surge current and the like when used outdoors;
3. the utility model discloses battery power measuring module can show the residual capacity, and this provides convenience for prompting the residual capacity and judging whether charging is needed;
4. the utility model discloses the communication adopts wired and wireless coexistence mode to provide reliable and stable wired communication and make things convenient for wireless communication.
5. The utility model discloses MCU and other can dormancy and the mode of outage are adopted in order to save the electric energy with the module of outage, adopt loRa to carry out wireless communication and more energy-conserving than general wireless communication. Therefore, compared with the voltage acquisition instrument on the market, the voltage acquisition instrument has wider applicability.
Drawings
FIG. 1 is a connection block diagram of a universal intelligent wireless multi-channel voltage collector according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the connection relationship between the acquisition circuit A and the power supply module;
fig. 3 is the working flow chart of the collecting instrument of the utility model.
Detailed Description
For better understanding of the technical solutions of the present invention, the following embodiments of the present invention are described in detail with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Examples
As shown in fig. 1-2, a general intelligent wireless multi-channel voltage acquisition instrument comprises a processor, an acquisition circuit and a power supply module;
the processor MCU is in data connection with other modules of the voltage acquisition instrument and is used for executing data acquisition, data operation, communication and storage functions and controlling the other modules of the voltage acquisition instrument to work; the processor MCU is in a dormant state in idle time (non-acquisition time) so as to meet the requirement of energy conservation and prolong the service time of the whole acquisition instrument; the processor MCU is connected with an upper computer (such as a computer or other equipment) through a wired communication module, an RS-485 bus protocol is specifically selected, and a protection circuit is additionally arranged between the processor MCU and the upper computer to prevent the internal power supply of the sensor from being burnt out by external high voltage or large current and the like when the communication is subjected to lightning stroke, static electricity and surge in a severe environment.
The acquisition circuit comprises an analog-to-digital converter, a filter and a measurement interface which are connected in sequence; the analog-to-digital converter is a 24-bit high-precision A/D converter; the number of the filters is the same as that of the measuring interfaces; an amplifier G with the power of 495 times is additionally arranged between a part of filters and the analog-to-digital converter so as to measure a more tiny voltage signal; PGA is integrated in the analog-to-digital converter to adapt to measurement and amplification of signals input at different voltage levels, the amplification factor can be adjusted by 1-128 times, and after the analog-to-digital converter is combined with an amplifier, the measurement amplification factor can be adjusted to thousands of times, so that the measurement requirements of millivolt-level voltage and volt-level voltage are met; the measuring interface is connected with a voltage sensor to be measured and is an interface suitable for two lines, three lines, four lines and five lines, and the interface mainly comprises at most five lines, a power supply positive line, a power supply negative line, a signal positive line, a signal negative line and a shielding line. Wiring methods with fewer than five wires can be wired according to instruction manuals;
the power supply module comprises a digital power supply module for supplying power to the acquisition circuit, provides various reference voltages, and selectively accesses voltages of 2.048V, 3.3V and 5.0V to the analog-to-digital converter through a selector during use; a user can select the amplification factor, the reference voltage and the like according to the measurement requirement of the voltage signal output by the sensor, so that the amplified measurement signal can better meet the requirement within the measurement range of the reference voltage, and the measurement precision of the measurement signal is improved; the power supply module also comprises an analog power supply module for supplying power to the sensor, and the analog power supply module provides 3.3V, 5.0V and 9.0V power supply voltages, and different voltages are accessed to the sensor through the measurement interface by selection during use; the analog power supply module and the digital power supply module are separately powered, and single-point grounding is used at the grounding position to prevent the mutual interference of power supply circuits between the digital power supply module and the analog power supply module and reduce the acquisition precision;
the electric energy source of the power supply module is a rechargeable battery to increase the applicability of the acquisition instrument, and the rechargeable battery is connected with the protection circuit and then is connected to the module of the acquisition instrument needing power supply, and can be charged in a solar charging mode; the protection circuit is anti-high voltage and leakage current for the anti-detonator, the piezoresistor, the TVS diode and the common mode inductor which are connected in sequence, so that the internal devices of the acquisition instrument cannot be damaged when the acquisition instrument is subjected to lightning stroke, static electricity, surge current and the like outdoors.
Voltage acquisition appearance still includes battery electric energy measuring module, and treater data connection for measure battery voltage and convert into the remaining electric quantity of battery, and the discovery battery has been in low electric quantity state in time, should give battery charging or change the battery, also can judge the remaining life-span of battery through long-term battery electric energy data, the utility model discloses choose for use IC chip LM358D cooperation peripheral circuit to supply voltage step-down and filtering, connect the low-voltage of output to microcontroller's ADC peripheral hardware and carry out analog-to-digital conversion, obtain its analog voltage's digit value.
The voltage acquisition instrument further comprises a wireless communication module, a LoRa (remote radio) protocol is arranged in the voltage acquisition instrument, and a plurality of acquisition instruments form a self-organizing star network structure through the wireless communication module; the LoRa protocol communication mode has the characteristics of low power consumption, long communication distance, high speed and small size and good stability, and the formed self-organizing star network can enable the acquisition instrument node to join or withdraw from the star network under the condition of not influencing other nodes so as to achieve the purpose of convenient and efficient installation and use.
The voltage acquisition instrument further comprises a temperature compensation module which is a temperature sensor in data connection with the processor, and the processor MCU performs compensation on the sensor acquired by the voltage acquisition instrument according to the measured temperature so as to ensure the accuracy of the acquired voltage signal.
The voltage acquisition instrument further comprises a memory for storing the acquired data converted by the analog-to-digital converter, and the processor MCU stores the acquired data in the memory according to time.
Each module of the voltage acquisition instrument is integrated in the waterproof aluminum shell, so that the voltage acquisition instrument is prevented from being corroded by long-term rainwater, ultraviolet rays and the like when used outdoors, and the service life of the voltage acquisition instrument is prolonged.
The acquisition circuit, the temperature compensation module, the memory module, the wireless and wired communication modules can also be switched to a dormant state or a power-off state, so that the acquisition circuit is in the dormant state in non-acquisition time, and the energy consumption is reduced.
The above disclosed acquisition instrument is operated as follows in a specific example:
when the acquisition instrument is powered on and started, initializing a sensor, an LoRa module and other related configuration parameters; after the configuration of the parameters is completed, actively sending a network access request to the LoRa gateway, if the network access fails, automatically re-accessing the network by the acquisition instrument, if the network access overtime is generated due to multiple network access failures, resetting the acquisition instrument, and re-accessing the network after the parameters are re-initialized; if the network access is successful, waiting for an instruction of an upper computer, and if no instruction of the upper computer is operated, acquiring and sending sensor data by the acquisition instrument according to initialized relevant parameters after a period of time; if the instruction sent by the upper computer exists, the acquisition instrument can automatically analyze the instruction and execute the instruction. The overall working flow of the acquisition instrument is as follows in fig. 3.
The voltage signal acquisition process of the sensor comprises the following steps:
1) configuring parameters: a user sets the output range of the sensor, the acquisition circuit automatically passes through a proper digital reference voltage of the selector according to the output range of the sensor set by the user and automatically sets a corresponding amplification factor so as to accurately measure the output voltage of the sensor, if micro-voltage signals (0-5 mV) are acquired, the sensor is connected to a channel 1, and other common signals (0-5.0V) are connected to channels 2-4; a user sets the analog power supply voltage of the sensor, and the acquisition circuit selects the proper power supply voltage of the sensor through the selector to supply power to the sensor; setting an acquisition channel, wherein a user needs to set the acquisition channel according to the number of accessed sensors and the channel so as to skip the channel acquisition of the missed sensor and accelerate the acquisition speed; when switching sensors, the aforementioned parameters need to be reconfigured. When the parameter configuration is completed, the analog-digital converter is self-corrected, and the voltage of the sensor can be acquired.
2) Collecting the voltage of a sensor: the analog-to-digital converter selects channels of the voltage sensors of each channel, and sequentially collects the voltage sensors from the channel 1 to the channel 4 (if a user sets a collection channel, the channel without the sensor is skipped, and the channel is circulated); the original sensor voltage signal reaches an analog-to-digital converter through a filter, the analog-to-digital converter converts the analog voltage signal into a digital voltage signal, actual temperature compensation is carried out on the converted voltage signal according to collected real-time temperature information, a high-precision digital voltage signal is obtained, and the digital voltage signal is acquired by an MCU and transmitted to an upper computer (or other equipment) or a cloud server in a wired or wireless mode.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (10)
1. A general intelligent multi-channel voltage acquisition instrument is characterized by comprising a processor, an acquisition circuit and a power supply module;
the processor MCU is in data connection with other modules of the voltage acquisition instrument and is used for executing data acquisition, data operation, communication and storage functions and controlling the other modules of the voltage acquisition instrument to work;
the acquisition circuit comprises an analog-to-digital converter, a filter and a measurement interface which are connected in sequence; the number of the filters is the same as that of the measuring interfaces; an amplifier is additionally arranged between part of the filter and the analog-to-digital converter; PGA is integrated in the analog-to-digital converter;
the measurement interface is connected with a voltage sensor to be measured;
the power supply module comprises a digital power supply module for supplying power to the acquisition circuit, provides various reference voltages, and accesses different voltages into the analog-to-digital converter by selection during use.
2. The voltage acquisition instrument according to claim 1, wherein the power supply module further comprises an analog power supply module for supplying power to the sensor, and the analog power supply module provides a plurality of power supply voltages, and selectively connects different voltages to the sensor through the measurement interface when in use; the analog power supply module and the digital power supply module are supplied with power separately, and a single-point grounding is used at the grounding position.
3. The voltage collector according to claim 1, further comprising a wireless communication module, wherein the LoRa protocol is built in, and the plurality of collectors form a self-organizing star network structure through the wireless communication module.
4. The voltage acquisition instrument according to claim 1, wherein the power supply module is a rechargeable battery, and the rechargeable battery is connected to the protection circuit and then connected to the module of the acquisition instrument to be powered.
5. The voltage collector according to claim 4, wherein the protection circuit is an anti-detonation device, a voltage dependent resistor, a TVS diode and a common mode inductor which are connected in sequence.
6. The voltage harvester of claim 4, further comprising a battery power measurement module in data communication with the processor for measuring battery voltage and converting to remaining battery power.
7. The voltage collector according to claim 1, wherein the processor MCU and the collecting circuit are both switchable to a sleep state or a power-off state, and are in the sleep state during the non-collecting time.
8. The voltage acquisition instrument according to claim 1, wherein the processor MCU is connected with the upper computer through a wired communication module, and a protection circuit is additionally arranged between the processor MCU and the upper computer.
9. The voltage harvester of claim 1, further comprising a temperature compensation module that is a temperature sensor in data communication with the processor.
10. The voltage collector of any one of claims 1-9, wherein the modules of the voltage collector are integrated into a waterproof aluminum housing.
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| CN201922235404.XU CN211741407U (en) | 2019-12-13 | 2019-12-13 | General type intelligence multichannel voltage acquisition appearance |
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| CN201922235404.XU CN211741407U (en) | 2019-12-13 | 2019-12-13 | General type intelligence multichannel voltage acquisition appearance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113848440A (en) * | 2021-09-30 | 2021-12-28 | 珠海黑石电气自动化科技有限公司 | Partial discharge detection system based on ultrasonic sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113848440A (en) * | 2021-09-30 | 2021-12-28 | 珠海黑石电气自动化科技有限公司 | Partial discharge detection system based on ultrasonic sensor |
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