CN111273583A - Intelligent water replenishing controller - Google Patents
Intelligent water replenishing controller Download PDFInfo
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- CN111273583A CN111273583A CN202010088960.3A CN202010088960A CN111273583A CN 111273583 A CN111273583 A CN 111273583A CN 202010088960 A CN202010088960 A CN 202010088960A CN 111273583 A CN111273583 A CN 111273583A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 230000001502 supplementing effect Effects 0.000 claims abstract description 14
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000003020 moisturizing effect Effects 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention relates to an intelligent water-supplementing controller, which comprises: the device comprises a power supply module, a DO interface module, an RS485 interface module, an AI acquisition interface module, a resistance acquisition interface module and an AO control interface module; the DO interface module, the AO control interface module, the resistance acquisition interface module, the AI acquisition interface module and the RS485 interface module are respectively connected with the CPU; the output end of the DO interface module is in control connection with the water drainage device; the output end of the AO acquisition interface module is in control connection with a water supplementing device; the resistance acquisition interface module is connected with the resistance type pressure sensor; the AI acquisition interface module is connected with the current type pressure sensor; alternating current power supply links to each other with power module's input, and power module's output links to each other with CPU, and intelligent water supply controller can realize using resistance type pressure sensor, can use current type pressure sensor again.
Description
Technical Field
The invention relates to the field of intelligent water replenishing, in particular to an intelligent water replenishing controller.
Background
In the heating system, after being heated by a boiler, water is conveyed to a user through a pipeline and then flows back to the boiler for heating, and the circulation is carried out. In the circulating process of water, the total water amount in the system can be changed due to the reasons of temperature change, water vaporization, pipeline leakage and the like, generally, the system is subjected to pressure drop, water needs to be timely supplemented into the system for maintaining circulating water supply, different types of water supplementing controllers need to be selected due to different types and models of pressure sensors installed on site, and an engineer is required to perform site tracking monitoring when abnormal water supplementing action occurs, the water supplementing controllers on the market at present are single in function, or have no remote transmission communication function or have no automatic diagnosis function, if one water supplementing controller is provided, not only a resistance type pressure sensor but also a current type pressure sensor can be used, the automatic diagnosis function is provided, multiple control modes are supported, remote transmission communication can be performed, and convenience can be brought to the work of field users, the working efficiency is improved.
Disclosure of Invention
The invention aims to provide an intelligent water supplementing controller, which can realize that a resistance type pressure sensor and a current type pressure sensor can be used.
In order to achieve the purpose, the invention provides the following scheme:
an intelligent water replenishment controller comprising: the device comprises a power supply module, a DO (digital output) interface module, an RS485 interface module, an AI (analog input) acquisition interface module, a resistance acquisition interface module and an AO (analog output) control interface module; the DO interface module, the AO control interface module, the resistance acquisition interface module, the AI acquisition interface module and the RS485 interface module are respectively connected with a CPU; the output end of the DO interface module is in control connection with a water drainage device; the output end of the AO acquisition interface module is in control connection with a water supplementing device; the resistance acquisition interface module is connected with the resistance type pressure sensor; the AI acquisition interface module is connected with the current type pressure sensor; the alternating current power supply is connected with the input end of the power supply module, and the output end of the power supply module is connected with the CPU.
Optionally, the water draining device includes an electromagnetic valve, an output end of the DO interface module is connected to the electromagnetic valve, and a control signal output by the DO interface module is used to control on/off of the electromagnetic valve, so as to achieve water draining or stop water draining.
Optionally, the water replenishing device includes a frequency converter, an output end of the AO control interface module is connected to the frequency converter, a control signal output by the AO control interface module is used for controlling the frequency converter, and the frequency converter receives the control signal to drive the water replenishing pump to operate, so as to realize water replenishing.
Optionally, the controller further includes the DI (digital input) interface module, an output end of the DI interface module is connected to the CPU, an input end of the DI interface module is connected to the frequency conversion alarm, and the DI interface module is used for collecting an alarm signal sent by the frequency conversion alarm.
Optionally, two RS485 interface modules are provided.
Optionally, the controller further includes a front panel module, an output end of the front panel module is connected to the CPU, the front panel module includes a nixie tube module, and the nixie tube module is configured to display various parameter values of the controller.
Optionally, the front panel module further includes an LED indicator.
Optionally, the front panel module further includes a key.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the intelligent water replenishing controller provided by the invention comprises: the device comprises a power supply module, a DO interface module, an AO control interface module, a resistance acquisition interface module, an AI acquisition interface module and an RS485 interface module; the DO interface module, the AO control interface module, the resistance acquisition interface module, the AI acquisition interface module and the RS485 interface module are respectively connected with the CPU; the output end of the DO interface module is in control connection with the water drainage device; the output end of the AO acquisition interface module is in control connection with a water supplementing device; the resistance acquisition interface module is connected with the resistance type pressure sensor; the AI acquisition interface module is connected with the current type pressure sensor; alternating current power supply is connected with power module's input, and power module's output is connected with CPU, can realize using resistance type pressure sensor, can use current type pressure sensor again.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an intelligent water replenishing controller according to an embodiment of the invention;
FIG. 2 is a circuit diagram of a DI acquisition interface module according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a DO interface module according to an embodiment of the present invention;
FIG. 4 is a circuit diagram of an AI acquisition interface module according to an embodiment of the invention;
FIG. 5 is a circuit diagram of a resistance collection interface module according to an embodiment of the present invention;
FIG. 6 is a circuit diagram of an AO control interface module according to an embodiment of the present invention;
fig. 7 is a circuit diagram of a front panel module according to an embodiment of the invention.
Description of the symbols:
the device comprises a power supply module 1, a 2-DI interface module, a 3-DO interface module, a 4-RS458 interface module, a 5-AI acquisition interface module, a 6-resistor acquisition module, a 7-AO control interface module, an 8-LED indicator lamp, a 9-key, a 10-nixie tube and a 11-CPU.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an intelligent water supplementing controller, which can realize that a resistance type pressure sensor and a current type pressure sensor can be used.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 6, the intelligent water replenishing controller in the present embodiment includes: the device comprises a power supply module 1, a DO interface module 3, an RS485 interface module 4, an AI acquisition interface module 5, a resistance acquisition interface module 6 and an AO control interface module 7; the DO interface module 3, the AO control interface module 7, the resistance acquisition interface module 6, the AI acquisition interface module 5 and the RS485 interface module 4 are respectively connected with the CPU 11; wherein, the output end of the DO interface module 3 is in control connection with the water drainage device; the output end of the AO acquisition interface module 7 is in control connection with a water supplementing device; the resistance acquisition interface module 6 is connected with the resistance type pressure sensor; the AI acquisition interface module 5 is connected with the current type pressure sensor; the alternating current power supply is connected with the input end of the power supply module 1, and the output end of the power supply module 1 is connected with the CPU 11.
As an optional implementation manner, the water draining device includes an electromagnetic valve, an output end of the DO interface module 3 is connected to the electromagnetic valve, and a control signal output by the DO interface module is used to control on/off of the electromagnetic valve, so as to achieve water draining or stop water draining.
When the CPU11 receives the control signal of the DO interface module 3, the CPU11 drives the DO interface module 3 to output the control signal to the relay, and the on-off of the electromagnetic valve is controlled by the contact of the relay.
As an optional implementation mode, the water replenishing device comprises a frequency converter, the output end of the AO control interface module 7 is connected with the frequency converter, a control signal output by the AO control interface module 7 is used for controlling the frequency converter, and the frequency converter receives the control signal to drive the water replenishing pump to operate so as to realize water replenishing.
The frequency of the frequency converter can be set by using a manual mode of the keys, the frequency converter operates according to a fixed frequency, the CPU11 controls the AO control interface module 7 to output a fixed current value to be transmitted to the frequency converter, and the current value is in a direct proportion relation with the frequency of the frequency converter, so that the fixed current value corresponds to the fixed frequency to supplement water.
As an optional implementation manner, the controller further includes a DI interface module 2, an output end of the DI interface module 2 is connected with the CPU11, an input end of the DI interface module 2 is connected with the variable frequency alarm, and the DI interface module is used for collecting an alarm signal sent by the variable frequency alarm.
CPU11 gathers the signal of DI interface module 2 output, when DI interface module 2 input signal is 0V, DI interface gathers the alarm signal that frequency conversion alarm sent and is 0 this moment, AO control interface module 7 output 0mA current value, at this moment, the controller just can perceive the converter to break down, then the controller just only gathers the pressure value, do not do any control, even if need the moisturizing also not carry out the moisturizing function, the moisturizing action is meaningless, the converter stop the operation.
As an alternative embodiment, two RS485 interface modules 4 are provided.
As an alternative embodiment, the controller further comprises a front panel module, the output of which is connected to the CPU11, the front panel module comprising a nixie tube module 10 for displaying various parameter values of the controller.
As an alternative embodiment, the front panel module further comprises LED indicator lights 8.
Preferably, 4 LED indicator lights 8 are provided for displaying various alarm conditions.
As an alternative embodiment, the front panel module further comprises keys 9.
Preferably, there are 4 keys 9 for implementing the operation.
The working principle of the intelligent water replenishing controller provided by the invention is as follows:
the controller is connected with the resistance type pressure sensor through the resistance acquisition interface module 6 and is used for acquiring the pressure value of the resistance type pressure sensor, and the acquired pressure value of the resistance type pressure sensor is PV; the controller is connected with the current type pressure sensor through the AI acquisition interface module 5 and is used for acquiring the pressure value of the current type pressure sensor and the pressure value PV of the acquired current type pressure sensor;
the controller sets an upper limit pressure value HA, a lower limit pressure value LA and a drain pressure value OP; the three parameter size relations are LA < HA < OP, and the step of collecting data of different pressure sensors comprises (all parameters are obtained by setting through a key):
s1: when the collected pressure value PV is smaller than the lower limit pressure value LA, the controller controls the AO interface module 7 to output current signals, different current values correspond to different frequencies, when the AO interface module 7 outputs a current value of 20mA, the control signal output by the AO control interface module 7 is used for controlling the frequency converter, the frequency converter receives the control signal to drive the water replenishing pump to operate, in the water replenishing process, the pressure is gradually increased, and water replenishing to the system is realized.
S2: when the collected pressure value PV is larger than the upper limit pressure value HA, the controller controls the AO interface module 7 to output a 0mA current value, and the frequency converter is controlled to stop water supplement.
S3: when the system pressure value PV is greater than the water drainage pressure value OP, the DO interface module 3 is connected with the electromagnetic valve and outputs an on signal to be transmitted to the electromagnetic valve, water drainage is started after the electromagnetic valve is switched on, the system pressure value PV is reduced in the water drainage process, and when the system pressure value is smaller than the upper limit HA, the DO interface is controlled to output an off signal to the electromagnetic valve, the electromagnetic valve is closed, and water drainage is stopped.
S4: under the constant pressure control mode, the CPU11 collects the pressure value and compares the pressure value with the set pressure value through a PID control algorithm, calculates a control output value, calculates a current value according to the output value, and transmits the calculated current value to the frequency converter through the AO control interface module 7, so that the system pressure value is equal to the set pressure value, and the constant pressure state of the system is realized.
As shown in fig. 4, in the AI acquisition interface module, a current signal firstly passes through a sampling resistor R5, the current signal is converted into a voltage signal, the input end of an operational amplifier U2 is connected to the voltage signal for isolated output, the output voltage signal is connected to an ADC pin of a CPU, and the CPU can calculate the input current value by acquiring and calculating the voltage, and further calculate the corresponding pressure value.
As shown in fig. 5, in the resistor collection interface module, a collection resistor, R36, R39, R40, and R43 form a wheatstone bridge, the wheatstone bridge converts a resistor signal into a differential voltage signal, and then amplifies, isolates and outputs the differential voltage signal through an operational amplifier U10, and connects the differential voltage signal to an ADC pin of a CPU, and the CPU converts the converted voltage to calculate a corresponding resistance value, and then further converts the resistance value to calculate a pressure value corresponding to the resistance value (the resistance value of the resistor type pressure sensor is in a direct proportional relationship with the pressure value).
The LED lamp state display principle of the intelligent water replenishing controller provided by the invention is as follows:
4 LED indicator lamps 8 are arranged on the front panel module and respectively comprise an upper limit alarm lamp, a lower limit alarm lamp, an output indicator lamp and a communication indicator lamp; the front panel module is connected with a controller mainboard through a cable, and the controller displays alarm, control and communication states through an LED indicator light 8; LED pilot lamp 8 is connected to each other with CPU 11's pin, and the bright and going out of different LED pilot lamps 8 of CPU11 direct control, its step is:
s1: when the collected pressure value is larger than the upper limit pressure value, the CPU11 controls the upper limit alarm lamp to be on, otherwise, the upper limit alarm lamp is turned off.
S2: when the collected pressure value is smaller than the lower limit pressure value, the CPU11 controls the lower limit alarm lamp to be on, otherwise, the lower limit alarm lamp is turned off;
s3: when the controller controls the AO control interface module 7 to output a current signal to the water pump frequency converter, the water pump is operated to realize a water supplementing function, and the output indicator lamp is controlled to be on in the process, otherwise, the output indicator lamp is turned off.
S4: when computer, PLC or touch-sensitive screen are connected with the controller, the controller carries out modbusRTU communication through RS485 interface module 4 and host computer connection, when CPU11 controller reads, every information of reading, the communication pilot lamp scintillation is once.
S5: when the collected pressure value is equal to the upper limit pressure value or the lower limit pressure value, the LED indicating lamp does not react.
The principles of the combined key and nixie tube display operation and parameter configuration of the intelligent water supplementing controller provided by the invention are as follows:
the controller configures various control parameters through a key 9, a front panel module is connected with a controller mainboard through a cable to realize the connection of the key 9 and a pin of a CPU11, and the front panel module is provided with 4 keys 9 which are respectively a 'manual/automatic switching' key, a 'setting' key, an 'adding' key and a 'subtracting' key; manual/automatic control debugging of water supplement control is realized through a manual/automatic switching key; the controller displays operation and configuration parameters through the nixie tube module 10, the front panel module is provided with 8 nixie tube modules 10, wherein the 4 nixie tube modules 10 are in one group and in two groups, when the controller is used for operating control parameters according to 9, the upper 4 nixie tube modules 10 display parameter names, and the lower 4 nixie tube modules 10 display parameter values. When the nixie tube module 10 is in an idle state, the upper 4 nixie tubes display system pressure values, and the lower 4 nixie tubes display lower limit or set pressure values.
The specific operation is as follows: firstly, pressing a 'setting' key for a short time to enter a parameter menu, if the configuration parameters are required to be switched, pressing the 'setting' key again to determine the parameters to be set, and pressing the 'manual/automatic switching' key to realize manual and automatic mode switching, for example, the current mode is a manual mode, when the 'manual/automatic switching' key is pressed, the mode is switched to an 'automatic' mode, and when the 'manual/automatic switching' key is pressed, the mode is switched to a 'manual' mode; in the manual mode, the lower nixie tube module 10 displays dbug, when the 'add' button is pressed at this time, the current value output by the AO control interface 7 of the controller is increased by 0.5mA, and when the controller is pressed once again, the current value is increased by 0.5mA again, and so on, the maximum current value is 20mA, and when the 'subtract' button is pressed each time correspondingly, the current value is reduced by 0.5mA, and so on, the minimum current value is 0 mA. The parameters are increased and decreased by pressing the 'adding' and 'subtracting' keys, after the parameters are set, the parameters can be stored by pressing the 'setting' key again, at the moment, the digital tube module 10 displays LOC in an upper row, and displays END in a lower row.
The RS485 communication principle of the intelligent water replenishing controller provided by the invention is as follows:
the 2 paths of RS485 interface modules 4 controlled by the controller support a ModbusRTU communication protocol, the first path of RS485 interface module 4 is used for communicating with an upper computer, and when the first path of RS485 interface module communicates with the upper computer, the controller serves as equipment, and the upper computer can realize acquisition and control of the controller; the second RS485 interface module 4 is used for communicating with a lower computer, the lower computer is generally a frequency converter or a water meter, and when the lower computer communicates with the lower computer, the controller is used as a main device to realize data acquisition of the frequency converter or the water meter.
Acquiring data of the frequency converter/water meter:
(1) and outputting a current signal to the frequency converter through the AO control interface module, wherein different current values correspond to different frequencies, and the frequency converter drives the water replenishing pump to operate.
(2) The controller passes through RS485 interface module 4 with the water gauge and is connected, and the water gauge needs to support modbusRTU agreement, and the controller reads the water gauge data as the host computer.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. An intelligent water replenishment controller, the controller comprising: the device comprises a power supply module, a DO interface module, an RS485 interface module, an AI acquisition interface module, a resistance acquisition interface module and an AO control interface module; the DO interface module, the AO control interface module, the resistance acquisition interface module, the AI acquisition interface module and the RS485 interface module are respectively connected with a CPU; the output end of the DO interface module is in control connection with a water drainage device; the output end of the AO acquisition interface module is in control connection with a water supplementing device; the resistance acquisition interface module is connected with the resistance type pressure sensor; the AI acquisition interface module is connected with the current type pressure sensor; the alternating current power supply is connected with the input end of the power supply module, and the output end of the power supply module is connected with the CPU.
2. The intelligent water supplementing controller according to claim 1, wherein the water draining device comprises an electromagnetic valve, the output end of the DO interface module is connected with the electromagnetic valve, and a control signal output by the DO interface module is used for controlling the on-off of the electromagnetic valve to realize water draining or stop water draining.
3. The intelligent water replenishing controller according to claim 1, wherein the water replenishing device comprises a frequency converter, the output end of the AO control interface module is connected with the frequency converter, a control signal output by the AO control interface module is used for controlling the frequency converter, and the frequency converter receives the control signal to drive the water replenishing pump to operate so as to realize water replenishing.
4. The intelligent water replenishing controller according to claim 1, wherein the controller further comprises the DI interface module, the output end of the DI interface module is connected with the CPU, the input end of the DI interface module is connected with a variable frequency alarm, and the DI interface module is used for collecting an alarm signal sent by the variable frequency alarm.
5. An intelligent water replenishing controller according to claim 1, wherein there are two RS485 interface modules.
6. The intelligent water replenishing controller according to claim 1, wherein the controller further comprises a front panel module, the output end of the front panel module is connected with the CPU, the front panel module comprises a nixie tube module, and the nixie tube module is used for displaying various parameter values of the controller.
7. An intelligent water replenishment controller according to claim 1 wherein the front panel module further comprises an LED indicator.
8. An intelligent water replenishment controller according to claim 1 wherein the front panel module further comprises a key.
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| CN202010088960.3A CN111273583B (en) | 2020-02-12 | 2020-02-12 | Intelligent water replenishing controller |
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| CN111273583B (en) | 2021-10-26 |
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Address after: 100021 room 2273, block B, No.9 Chaoqian Road, Changping District, Beijing Patentee after: Jinfang Energy Group Co.,Ltd. Address before: 100021 room 2273, block B, No.9 Chaoqian Road, Changping District, Beijing Patentee before: BEIJING KINGFORE HVAC ENERGY SAVING TECHNOLOGY Co.,Ltd. |