CN210268716U - Remote measurement and control terminal system - Google Patents
Remote measurement and control terminal system Download PDFInfo
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- CN210268716U CN210268716U CN201920970861.0U CN201920970861U CN210268716U CN 210268716 U CN210268716 U CN 210268716U CN 201920970861 U CN201920970861 U CN 201920970861U CN 210268716 U CN210268716 U CN 210268716U
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Abstract
The application discloses long-range measurement and control terminal system includes: peripheral load 100 and with peripheral load 100 connected remote monitor terminal 200, wherein, remote monitor terminal 200 includes: a rainfall collecting module 210 configured to collect rainfall data of the peripheral load 100; a water level collection module 220 configured to collect water level data of the peripheral load 100; and a processor 230 connected to the rainfall collecting module 210 and the water level collecting module 220 and configured to process each input signal. The utility model provides a remote measurement and control terminal system is through setting up rainfall collection module and water level collection module in remote measurement and control terminal for remote measurement and control terminal system's the degree of integrating is higher, thereby realizes carrying out remote acquisition and monitoring simultaneously to the rainfall data and the water level data on monitoring scene in real time, and has reduced the cost to the maintenance upgrading and the maintenance of remote measurement and control terminal system.
Description
Technical Field
The application relates to the field of remote measurement and control terminals, in particular to a remote measurement and control terminal system.
Background
The remote measurement and control terminal (RTU) is an electronic device installed on a remote site, is used for monitoring and measuring sensors and equipment installed on the remote site, and is responsible for monitoring and controlling field signals and industrial equipment. The remote measurement and control terminal is widely applied to the field of hydrological monitoring.
When the existing remote measurement and control terminal system is applied to hydrology monitoring, rainfall data and water level data of a monitoring field can not be remotely collected and monitored in real time well, the degree of integration of equipment is low, so that when the rainfall and the water level of the monitoring field are monitored, the monitoring effect is not ideal enough, and the cost of later maintenance upgrading and overhauling is increased.
Aiming at the technical problem that the remote measurement and control terminal system in the prior art cannot well realize the real-time remote acquisition and monitoring of rainfall data and water level data of a monitoring field, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
It is an object of the present application to overcome the above problems or to at least partially solve or mitigate the above problems.
According to an aspect of the present application, there is provided a remote measurement and control terminal system, including: peripheral hardware load and with the remote measurement and control terminal that peripheral hardware load is connected, wherein, remote measurement and control terminal includes: the rainfall acquisition module is configured for acquiring rainfall data of an external load; the water level acquisition module is configured for acquiring water level data of an external load; and the processor is connected with the rainfall acquisition module and the water level acquisition module and is configured to process each input signal.
Optionally, the rainfall collecting module includes a first interference cancellation circuit, a second interference cancellation circuit, and a third interference cancellation circuit, wherein an input end of the first interference cancellation circuit is connected to the external load, an input end of the second interference cancellation circuit is connected to an output end of the first interference cancellation circuit, an input end of the third interference cancellation circuit is connected to an output end of the second interference cancellation circuit, and an output end of the third interference cancellation circuit is connected to the processor.
Optionally, the first interference cancellation circuit is an RC filter circuit, the second interference cancellation circuit is a schmitt trigger circuit, and the third interference cancellation circuit is a monostable multivibrator circuit.
Optionally, the water level collection module includes at least one interface circuit, where the interface circuit is an RS485 interface circuit or an RS232 interface circuit, and is configured to send a collection command and receive water level data.
Optionally, the water level collection module further comprises an interface driver, one end of the interface driver is connected with the processor, and the other end of the interface driver is connected with the interface circuit.
Optionally, the remote measurement and control terminal further includes a communication module, and the communication module is connected to the processor and configured to send and receive data information.
Optionally, the communication module includes a DTU communication RS232 interface circuit and a bluetooth communication interface circuit.
Optionally, the remote measurement and control terminal further includes: and the monitoring circuit module is connected with the processor and is configured for monitoring the working condition information of the remote measurement and control terminal.
Optionally, the remote measurement and control terminal further includes: the peripheral power supply output module is connected with the processor and the power supply and is configured to supply power to a peripheral load.
Optionally, the peripheral power supply output module includes an NMOS transistor Q1 and a PMOS transistor Q2, wherein a gate of the NMOS transistor Q1 is connected to the processor 230 through a first resistor R1 and is grounded through a fourth resistor R4; the source of NMOS transistor Q1 is grounded; the drain of the NMOS transistor Q1 is connected with the gate of the PMOS transistor through a third resistor R3; the grid of the PMOS transistor Q2 is also connected with the power supply through a second resistor R2; the source electrode of the PMOS transistor Q2 is connected with a power supply; and the drain of the PMOS transistor Q2 is connected to the external load and to ground through capacitors (C1, C2).
Therefore, the remote measurement and control terminal system of the application sets the rainfall acquisition module and the water level acquisition module in the remote measurement and control terminal, so that the integration degree of the remote measurement and control terminal system is higher, the rainfall data and the water level data of a monitoring field are remotely acquired and monitored in real time, the acquisition and monitoring effects are good, and the maintenance upgrading and overhauling cost of the remote measurement and control terminal system is reduced.
The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic diagram of a remote monitor and control terminal system according to an embodiment of the present application;
fig. 2 is a schematic circuit structure diagram of a rainfall collecting module of a remote monitoring and control terminal according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an RS485 interface circuit according to one embodiment of the present application;
FIG. 4 is a schematic diagram of an RS232 interface circuit according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a remote monitor and control terminal system according to an embodiment of the present application;
fig. 6 is a schematic circuit diagram of a peripheral power output module according to an embodiment of the present application.
Detailed Description
FIG. 1 is a schematic structural diagram of a remote measurement and control terminal system capable of waking up according to water level changes according to the present application.
Referring to fig. 1, this embodiment provides a remote measurement and control terminal system, including: peripheral load 100 and with peripheral load 100 connected remote monitor terminal 200, wherein, remote monitor terminal 200 includes: a rainfall collecting module 210 configured to collect rainfall data of the peripheral load 100; a water level collection module 220 configured to collect water level data of the peripheral load 100; and a processor 230 connected to the rainfall collecting module 210 and the water level collecting module 220 and configured to process each input signal.
Specifically, referring to fig. 1, the peripheral loads 100 of the remote monitoring and control terminal system of the present application may be, for example, a rain gauge 110 and a water level sensor 120. Wherein, the output end of the rain gauge 110 is connected with the rainfall collecting module 210, and the output end of the water level sensor 120 is connected with the water level collecting module 220.
Therefore, the rainfall acquisition module and the water level acquisition module are arranged in the remote measurement and control terminal, so that the integration degree of the remote measurement and control terminal system is higher, the rainfall data and the water level data of a monitoring field are remotely acquired and monitored in real time, and the maintenance upgrading and overhauling cost of the remote measurement and control terminal system is reduced.
Optionally, the rainfall collecting module 210 includes a first interference cancellation circuit 211, a second interference cancellation circuit 212, and a third interference cancellation circuit 213, wherein an input end of the first interference cancellation circuit 211 is connected to the external load 100, an input end of the second interference cancellation circuit 212 is connected to an output end of the first interference cancellation circuit 211, an input end of the third interference cancellation circuit 213 is connected to an output end of the second interference cancellation circuit 212, and an output end of the third interference cancellation circuit 213 is connected to the processor 230.
Optionally, the first interference cancellation circuit 211 is an RC filter circuit, the second interference cancellation circuit 212 is a schmitt trigger circuit, and the third interference cancellation circuit 213 is a monostable multivibrator circuit.
Specifically, refer to fig. 2, which is a schematic diagram of a circuit structure of the rainfall collecting module 210 of the remote measurement and control terminal according to the present application. The input end of the first interference cancellation circuit 211 is connected to the output end of the rain gauge 110 of the external load 100, so that the present embodiment can filter the high-frequency pulse jitter by using the RC filter circuit, and allow the pulse signal with relatively low frequency to pass through, so as to filter the pulse jitter in the pulse signal output by the rain gauge 110. Therefore, the purpose of eliminating pulse jitter in the pulse signal output by the rain gauge can be achieved through a simple circuit structure.
However, when the pulse jitter is not of high frequency, for example, only one or two or only a few pulses are jittered. Then in this case the RC filter circuit still cannot effectively remove the lower frequency pulse jitter in practice. The output end of the RC filter circuit is connected with the Schmitt trigger circuit, so that the defect of the RC filter circuit can be made up to a certain extent. Therefore, the Schmitt trigger circuit is combined with the RC filter circuit, so that the complementary advantages of the Schmitt trigger circuit and the RC filter circuit are realized, the interference of high-frequency signals is eliminated, and meanwhile, the low-frequency pulse jitter can be further eliminated, the performance of the interference elimination circuit is further improved, and the adverse reaction caused by the pulse jitter is avoided.
Referring to fig. 2, the third interference cancellation circuit 213 is a monostable multivibrator circuit having an input connected to an output of the schmitt trigger circuit. As described above, the RC filter circuit may be used to filter out high frequency dither signals, and the schmitt trigger circuit may be used to filter out dither signals having an amplitude between a positive-going threshold voltage and a negative-going threshold voltage. But for some low frequency dither signals, the dither signal cannot be cancelled when the desired amplitude is above the positive threshold voltage or below the negative threshold voltage. This problem can now be ameliorated by providing a monostable multivibrator circuit.
Therefore, the rainfall acquisition module 210 is arranged in the remote measurement and control terminal, and interference signals in signals output by the rainfall meter 110 are eliminated by using the interference elimination circuit, so that interference signals which can be generated by mechanical shaking of a tipping bucket and the like are filtered, and the remote measurement and control terminal receives more accurate and effective rainfall signals collected by the rainfall meter 110.
Referring to fig. 2, the rain gauge 110 may be a dump-type rain gauge, for example. The RAIN gauge 110 is turned on and outputs a RAIN signal (INT _ RAIN _ IN), which is at a low level. The rainfall signal (INT _ RAIN _ IN) passes through the RC filter 211 to filter out high frequency interference IN the signal. The input of the Schmitt trigger (U1) is low, and the output signal of the Schmitt trigger (U1) is inverted from low to high. Therefore, the input pin 12 of the monostable multivibrator (U2) generates rising edge trigger, the state of the pin 9 of the homodromous output pin of the monostable multivibrator (U2) is overturned from a steady high level to a transient low level, is kept for 200ms, and then is overturned to a high level stable state again. The processor 230 records that the RAIN gauge 110 is turned over once through the interruption trigger of the rainfall signal (nINT _ RAIN) output by the rainfall acquisition module 210. Therefore, the rainfall data is collected, and the interference signal in the signal output by the rain gauge 110 is eliminated by using the interference elimination circuit, so that the collected rainfall signal is more accurate and effective.
Optionally, the water level collecting module 220 includes at least one interface circuit, wherein the interface circuit is an RS485 interface circuit or an RS232 interface circuit, and is configured to send a collecting command and receive water level data.
Optionally, the water level collection module 220 further comprises an interface driver, one end of the interface driver is connected to the processor 230, and the other end of the interface driver is connected to the interface circuit.
Specifically, the water level collection module 220 includes at least one interface circuit, wherein the interface circuit may be, for example, an RS485 interface circuit. Fig. 3 shows a schematic structural diagram of the RS485 interface circuit of the present embodiment. Referring to fig. 3, the RS485 interface circuit further includes an interface driver (U1), wherein the interface driver (U1) is an interface driver chip with model 75LBC 184.
In addition, referring to fig. 3, the RS485 interface circuit of the present embodiment controls to turn on the power supply of the water level sensor 120 based on the half-duplex mode of RS485 communication, and waits for the water level sensor 120 to operate stably. The processor 230 enables the interface driver (U1) to be in a data transmission mode by controlling the RS485_ DE signal and the RS485_ nRE signal, and the serial port transmits an acquisition command. After the acquisition command is completely transmitted, the processor 230 enables the interface driver (U1) to be in a data receiving mode by controlling the RS485_ DE signal and the RS485_ nRE signal, and receives the water level data returned by the water level sensor 120. After the communication is completed, the processor 230 controls the RS485_ DE signal and the RS485_ nRE signal to enable the interface driver (U1) to enter an idle state, so that the power consumption of the system can be reduced. After the remote measurement and control terminal system analyzes the water level data, the water level data can be further displayed, stored in a solid state and organized to report to a data center. Therefore, the acquisition of the water level data by the remote measurement and control terminal system is completed.
In addition, since the water level collection module 220 includes at least one interface circuit, the interface circuit may also be an RS232 interface circuit, for example. Fig. 4 shows a schematic structural diagram of the RS232 interface circuit of the present embodiment. Referring to FIG. 4, the RS232 interface circuit also includes an interface driver (U1), where the interface driver (U1) is a multi-channel RS-232 driver/receiver model MAX 242. The interface driver of the RS232 interface circuit of this embodiment adopts positive 5V power supply, and has the effects of saving the occupied area and saving the power consumption.
Further, referring to fig. 4, the RS232 interface circuit of the present embodiment is based on the full duplex mode of RS32 communication. The processor 230 controls to turn on the power supply of the water level sensor 120, and after the water level sensor 120 works stably, the processor 230 enables the sending function of the interface driver (U1) by controlling the signal of the POW _ CT1, and the serial port sends the acquisition command. After the water level data returned by the water level sensor 120 is received, the communication for water level acquisition is completed or finished, the signal of the POW _ CT1 is pulled to be low level, the interface driver chip sends out the disable, and the low power consumption state is entered. After the remote measurement and control terminal system analyzes the water level data, the water level data can be further displayed, stored in a solid state and organized to report to a data center. Therefore, the acquisition of the water level data by the remote measurement and control terminal system is completed.
Preferably, the remote measurement and control terminal system of this embodiment may be provided with, for example, 2 paths of interfaces having an RS485 interface circuit (RS 485 interface for short) and 2 paths of interfaces having an RS232 interface circuit (RS 232 interface for short). When interface configuration is specifically performed, one of the RS232 interfaces may be used for connecting with a DTU device, for example, and the other RS232 interface may be used for connecting with the water level sensor 120 or serving as a reserved interface, so that the interface configuration may be applied to other extension devices according to different project requirements. Similarly, one of the RS485 interfaces may be used to connect with the water level sensor 120, and the other RS485 interface may be used as a reserved interface, for example, so as to be applied to other expansion devices according to different requirements of the project. Which may be, for example, a camera, a satellite module, etc.
Optionally, the remote measurement and control terminal 200 further includes a communication module 240, and the communication module 240 is connected to the processor 230 and configured to send and receive data information.
Optionally, the communication module 240 includes a DTU communication RS232 interface circuit and a bluetooth communication interface circuit.
Specifically, fig. 5 shows a structural schematic of the remote measurement and control terminal system of the present embodiment. Referring to fig. 5, the remote measurement and control terminal 200 of the present embodiment further includes a communication module 240, and the communication module 240 includes a DTU communication RS232 interface circuit and a bluetooth communication interface circuit.
The DTU communication RS232 interface circuit is used to implement communication between the processor 230 of the remote measurement and control terminal 200 and the DTU. The DTU is a wireless terminal device which is specially used for converting serial port data into IP data or converting the IP data into the serial port data and transmitting the serial port data through a wireless communication network. The DTU is widely applied to the industries of meteorology, hydrology, water conservancy, geology and the like. The DTU communication RS232 interface circuit can realize that the remote measurement and control terminal 200 compiles a message according to a corresponding communication protocol according to the monitored rainfall data or water level data, working condition information and other data, reports the report to the remote measurement center through the DTU wireless communication module, and responds to the issuing command of the remote measurement center. The Bluetooth communication interface circuit can realize the inquiry and configuration of the RTU equipment operation parameters of the remote measurement and control terminal 200 at the mobile terminal.
Optionally, the remote measurement and control terminal 200 further includes: the monitoring circuit module 250 connected to the processor 230 is configured to monitor the operating condition information of the remote monitoring and control terminal 200.
Therefore, referring to fig. 5, in the remote monitoring and control terminal system, the monitoring circuit module 250 is provided, and the monitoring circuit module 250 is used for monitoring the operating condition information of the remote monitoring and control terminal system. Therefore, the remote measurement and control terminal system can perform early warning and improvement measures according to the working condition information monitored by the monitoring circuit module 250, and the remote measurement and control terminal system can sense and monitor the working environment. Therefore, the possibility of the fault of the remote measurement and control terminal system is reduced, and the service life of the remote measurement and control terminal system is prolonged. And reduces the economic and labor costs of repair or replacement.
The monitoring circuit module 250 includes a temperature and humidity sensor, wherein an output terminal of the temperature and humidity sensor is connected to an input terminal of the processor. The temperature and humidity sensor model can be SHT20, for example. Therefore, the temperature and the humidity of the remote measurement and control terminal system can be monitored according to the temperature and humidity sensor in the monitoring circuit module 250, and the temperature and the humidity are the working condition information. If one of the monitored temperature or humidity values exceeds a predetermined threshold (the threshold is a temperature threshold or a humidity threshold), the processor 200 controls the peripheral device to perform an early warning and improvement measure, wherein the improvement measure may be, for example, to stop part of the non-emergency work tasks according to the priority. The remote monitoring terminal system can sense and monitor the working environment, so that the possibility of the remote monitoring terminal system breaking down is reduced.
Optionally, the remote measurement and control terminal 200 further includes: a peripheral power output module 260 and a power supply 270, wherein the peripheral power output module 260 is connected to the processor 230 and the power supply 270, and is configured to supply power to the peripheral load 100.
Optionally, the peripheral power output module 260 includes an NMOS transistor Q1 and a PMOS transistor Q2, wherein a gate of the NMOS transistor Q1 is connected to the processor 230 through a first resistor R1 and is grounded through a fourth resistor R4; the source of NMOS transistor Q1 is grounded; the drain of the NMOS transistor Q1 is connected with the gate of the PMOS transistor through a third resistor R3; the gate of the PMOS transistor Q2 is also connected to the power supply 270 through a second resistor R2; the source of the PMOS transistor Q2 is connected to the power supply 270; and the drain of the PMOS transistor Q2 is connected to the external load 100 and to ground through capacitors (C1, C2).
Specifically, fig. 6 shows a schematic circuit structure diagram of the peripheral power supply output module 260 of the remote measurement and control terminal system of the embodiment. Referring to fig. 5 and 6, the peripheral power output module 260 is connected to the processor 230 and the power supply 270, and configured to supply power to the peripheral load 100. The peripheral power supply output module 260 uses a MOS transistor as an electronic switch to control the power supply output of the peripheral power supply output module 260.
The model of the NMOS transistor Q1 is 2N7002, and the model of the PMOS transistor Q2 is IRF 4905.
Referring specifically to fig. 6, "V + 12V" represents the output voltage of the power supply 270. When the signal (POW _ CT0_ OUT) is at a high level '1', the NMOS transistor Q1 is turned on, a voltage difference is formed across the R2 resistor, the PMOS transistor Q2 is turned on, and the signal (V +12_ OUT0) outputs a positive 12V voltage to supply power to the external load 100; when the signal (POW _ CT0_ OUT) is at the low level '0', the NMOS transistor Q1 is turned on and off, the PMOS transistor Q2 is turned on and off, and the signal (V +12_ OUT0) is turned off, so that the power supply to the external load 100 is stopped. The peripheral load 100 may be a load device such as a DTU, a water level sensor, a camera, a flow meter, or a satellite module, for example. Therefore, by arranging the peripheral power supply output module 260, the remote measurement and control terminal RTU equipment can realize the control of supplying power to the peripheral load, and further improves the working efficiency of the remote measurement and control terminal system.
Therefore, the remote measurement and control terminal system of the application sets the rainfall acquisition module and the water level acquisition module in the remote measurement and control terminal, so that the integration degree of the remote measurement and control terminal system is higher, the rainfall data and the water level data of a monitoring field are remotely acquired and monitored in real time, and the maintenance upgrading and overhauling cost of the remote measurement and control terminal system is reduced.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A remote measurement and control terminal system is characterized by comprising: peripheral load (100) and with remote observing and controlling terminal (200) that peripheral load (100) are connected, wherein, remote observing and controlling terminal (200) includes:
a rainfall acquisition module (210) configured to acquire rainfall data of the peripheral load (100);
a water level acquisition module (220) configured to acquire water level data of the peripheral load (100); and
and the processor (230) is connected with the rainfall acquisition module (210) and the water level acquisition module (220) and is configured to process each input signal.
2. The remote measurement and control terminal system according to claim 1, wherein the rainfall collecting module (210) comprises a first interference cancellation circuit (211), a second interference cancellation circuit (212) and a third interference cancellation circuit (213), wherein
An input terminal of the first interference cancellation circuit (211) is connected to the external load (100), an input terminal of the second interference cancellation circuit (212) is connected to an output terminal of the first interference cancellation circuit (211), an input terminal of the third interference cancellation circuit (213) is connected to an output terminal of the second interference cancellation circuit (212), and an output terminal of the third interference cancellation circuit (213) is connected to the processor (230).
3. The remote measurement and control terminal system according to claim 2, wherein the first interference cancellation circuit (211) is an RC filter circuit, the second interference cancellation circuit (212) is a schmitt trigger circuit, and the third interference cancellation circuit (213) is a monostable multivibrator circuit.
4. The remote measurement and control terminal system according to claim 3, wherein the water level collection module (220) comprises at least one interface circuit, wherein the interface circuit is an RS485 interface circuit or an RS232 interface circuit, and is configured to send a collection command and receive water level data.
5. The remote measurement and control terminal system according to claim 4, wherein the water level collection module (220) further comprises an interface driver, one end of the interface driver is connected with the processor (230), and the other end of the interface driver is connected with the interface circuit.
6. The remote test control terminal system according to claim 5, wherein the remote test control terminal (200) further comprises a communication module (240), the communication module (240) being connected to the processor (230) and configured to send and receive data information.
7. The remote test control terminal system of claim 6, wherein the communication module (240) comprises a DTU communication RS232 interface circuit and a Bluetooth communication interface circuit.
8. The remote test control terminal system according to claim 1, wherein the remote test control terminal (200) further comprises: and the monitoring circuit module (250) is connected with the processor (230) and is configured to monitor the working condition information of the remote measurement and control terminal (200).
9. The remote test control terminal system according to claim 1, wherein the remote test control terminal (200) further comprises: the peripheral power supply system comprises a peripheral power supply output module (260) and a power supply (270), wherein the peripheral power supply output module (260) is connected with the processor (230) and the power supply (270) and is configured to supply power to the peripheral load (100).
10. The remote test and control terminal system of claim 9, wherein the peripheral power output module (260) comprises an NMOS transistor (Q1) and a PMOS transistor (Q2), wherein
The gate of the NMOS transistor (Q1) is connected to the processor (230) through a first resistor (R1) and to ground through a fourth resistor (R4);
the source of the NMOS transistor (Q1) is grounded;
the drain of the NMOS transistor (Q1) is connected with the gate of the PMOS transistor through a third resistor (R3);
the gate of the PMOS transistor (Q2) is also connected with the power supply (270) through a second resistor (R2);
the source of the PMOS transistor (Q2) is connected with the power supply (270); and
the drain of the PMOS transistor (Q2) is connected to the peripheral load (100) and to ground via a capacitor (C1, C2).
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| CN201920970861.0U CN210268716U (en) | 2019-06-25 | 2019-06-25 | Remote measurement and control terminal system |
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| CN201920970861.0U CN210268716U (en) | 2019-06-25 | 2019-06-25 | Remote measurement and control terminal system |
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