CN220171415U - Low-power-consumption remote measurement and control terminal - Google Patents
Low-power-consumption remote measurement and control terminal Download PDFInfo
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- CN220171415U CN220171415U CN202321547544.0U CN202321547544U CN220171415U CN 220171415 U CN220171415 U CN 220171415U CN 202321547544 U CN202321547544 U CN 202321547544U CN 220171415 U CN220171415 U CN 220171415U
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- 238000005259 measurement Methods 0.000 title claims abstract description 41
- 238000004891 communication Methods 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model relates to the technical field of remote measurement and control, and provides a low-power-consumption remote measurement and control terminal which comprises a power supply circuit, wherein the power supply circuit comprises a storage battery E1, a timer U1, a trigger U2, a switch tube Q1, a switch tube Q2 and a relay K2, the clock end of the trigger U2 is connected with the output end of the timer U1, the input end of the trigger U2 is connected with the positive electrode of the storage battery E1, the output end of the trigger U2 is connected with the control end of the switch tube Q1, the first end of the switch tube Q1 is connected with the positive electrode of the storage battery E1, the second end of the switch tube Q1 is connected with the control end of the switch tube Q2, the first end of the switch tube Q2 is connected with the first input end of the relay K2, the public end of the relay K2 is used for connecting with a sensor acquisition signal, the normally open end of the relay K2 is connected with the first input end of a main control unit, and the second end of the switch tube Q2 is grounded. Through the technical scheme, the problem of high power consumption of the remote measurement and control terminal in the prior art is solved.
Description
Technical Field
The utility model relates to the technical field of remote measurement and control, in particular to a low-power-consumption remote measurement and control terminal.
Background
The remote measurement and control terminal is a special computer measurement and control unit with a modularized structure, which is designed aiming at longer communication distance and severe industrial field environment, connects an end detection instrument and an execution mechanism with a host computer of a remote regulation and control center, has remote data acquisition, control and communication functions, can receive an operation instruction of the host computer and control the action of the execution mechanism of the end, and can only supply power by using a storage battery because the remote measurement and control terminal usually works outdoors or in places with inconvenient supply of commercial power.
Disclosure of Invention
The utility model provides a low-power-consumption remote measurement and control terminal, which solves the problem of high power consumption of the remote measurement and control terminal in the prior art.
The technical scheme of the utility model is as follows:
the low-power-consumption remote measurement and control terminal comprises a main control unit, a power supply circuit and a wireless communication unit, wherein the power supply circuit is connected with the main control unit, the main control unit is in communication connection with a management center by means of the wireless communication unit, the power supply circuit comprises a storage battery E1, an OR gate U3, a timer U1, a trigger U2, a diode D1, a resistor R1, a switching tube Q1, a resistor R2, a switching tube Q2 and a relay K2,
the first input end of the OR gate U3 is connected with the first output end of the main control unit, the second input end of the OR gate U3 is connected with the output end of the timer U1, the data communication end of the timer U1 is connected with the main control unit, the output end of the OR gate U3 is connected with the clock end of the trigger U2, the first input end of the trigger U2 is connected with the positive electrode of the storage battery E1, the first input end of the trigger U2 is connected with the second input end of the trigger U2, the output end of the trigger U2 is connected with the positive electrode of the diode D1,
the cathode of the diode D1 is connected with the control end of the switch tube Q1 through the resistor R1, the first end of the switch tube Q1 is connected with the anode of the storage battery E1, the cathode of the storage battery E1 is grounded, the second end of the switch tube Q1 is connected with the control end of the switch tube Q2 through the resistor R2, the first end of the switch tube Q2 is connected with the first input end of the relay K2, the second input end of the relay K2 is connected with the anode of the storage battery E1, the common end of the relay K2 is used for being connected with a sensor acquisition signal, the normally open end of the relay K2 is connected with the first input end of the main control unit, and the second end of the switch tube Q2 is grounded.
Further, a signal processing circuit is arranged between the normal open end of the relay K2 and the first input end of the main control unit, the signal processing circuit comprises a resistor R8, a resistor R9, an operational amplifier U4, a resistor R10, a resistor R11, a capacitor C3, a capacitor C4 and an operational amplifier U5, the first end of the resistor R8 is connected with the normal open end of the relay K2, the second end of the resistor R8 is connected with the inverting input end of the operational amplifier U4, the non-inverting input end of the operational amplifier U4 is connected with a Vref1 reference power supply through the resistor R9, the output end of the operational amplifier U4 is connected with the inverting input end of the operational amplifier U4 through the resistor R10, the output end of the operational amplifier U4 is connected with the first end of the resistor R11, the second end of the resistor R11 is grounded through the capacitor C3, the second end of the resistor R11 is connected with the non-inverting input end of the operational amplifier U5, the inverting input end of the operational amplifier U5 is connected with the inverting input end of the main control unit 5 through the capacitor C4, and the output end of the operational amplifier U5 is connected with the inverting input end of the operational amplifier U5.
Further, the utility model also includes a voltage detection circuit, the voltage detection circuit includes a resistor R4, a switch tube Q3, a resistor R5, a switch tube Q4, a resistor R6, and a resistor R7, where a first end of the resistor R4 is connected to the positive electrode of the storage battery E1, a second end of the resistor R4 is connected to the control end of the switch tube Q3, a first end of the switch tube Q3 is connected to the control end of the switch tube Q4, a first end of the switch tube Q3 is connected to the first end of the switch tube Q4 through the resistor R5, a second end of the switch tube Q3 is grounded, a first end of the switch tube Q4 is connected to the positive electrode of the storage battery E1, a second end of the switch tube Q4 is connected to the first end of the resistor R7 through the resistor R6, a second end of the resistor R7 is grounded, and a first end of the resistor R7 is connected to the second input end of the main control unit.
Further, the utility model also comprises a voltage overrun detection circuit, wherein the voltage overrun detection circuit comprises a resistor R13, a resistor R14, a resistor R15, an operational amplifier U6 and a diode D3, the first end of the resistor R13 is connected with the positive electrode of the storage battery E1, the second end of the resistor R13 is connected with the first end of the resistor R15 through the resistor R14, the second end of the resistor R15 is grounded, the non-inverting input end of the operational amplifier U6 is connected with the second end of the resistor R13, the inverting input end of the operational amplifier U6 is connected with a Vref2 reference power supply, the output end of the operational amplifier U6 is connected with the anode of the diode D3, and the cathode of the diode D3 is connected with the third input end of the main control unit.
Further, the voltage overrun detecting circuit in the present utility model further includes an operational amplifier U7 and a diode D4, wherein the non-inverting input end of the operational amplifier U7 is connected to the Vref2 reference power supply, the inverting input end of the operational amplifier U7 is connected to the first end of the resistor R15, the output end of the operational amplifier U7 is connected to the anode of the diode D4, and the cathode of the diode D4 is connected to the fourth input end of the main control unit.
The working principle and the beneficial effects of the utility model are as follows:
in the utility model, the power supply circuit provides a working power supply for the remote measurement and control terminal, the remote measurement and control terminal can perform data acquisition at intervals of a certain time according to requirements, when the set time is reached, the power supply circuit works, the remote measurement and control terminal performs signal acquisition, an acquisition signal is sent to the main control unit, the main control unit sends the acquired data to the management center through the wireless communication unit, meanwhile, the management center can also send out an instruction signal at any time, the instruction signal is sent to the main control unit through the wireless communication unit, and then the power supply circuit works when the main control unit outputs a control instruction.
Specifically, the working principle of the power supply circuit is as follows: the data communication end (SCL pin and SDA pin) of the timer U1 communicates with the main control unit, the main control unit can enable the timer U1 to output positive pulse signals with a certain pulse width according to set time, when data acquisition is needed, the pulse signals are sent to the clock end (CLK pin) of the trigger U2, at the moment, the input end of the trigger U2 is connected with the positive electrode of the storage battery E1, when the clock end of the trigger U2 receives the pulse signals with rising edges, the trigger U1 outputs high-level signals, the diode D1 is conducted, the switch Q1 is conducted, the control end of the switch Q2 is changed to high level, the switch Q2 is also conducted, the relay K2 is electrically connected with the normal start end of the relay K2, at the moment, the main control unit can receive signals acquired by the sensor, the main control unit sends the acquired signals to the management center through the wireless communication unit, at the moment, the input end of the trigger U2 is still high-level, the level output by the trigger U2 is still high-level, the high-level output by the trigger U2 is still turned on, the high-level is turned off by the main control unit, the relay Q2 is turned off, and the relay Q2 is not turned off at the normal start of the three-level, and the relay Q2 is turned off, and the normal state is turned off. At this time, the remote measurement and control terminal enters a dormant state, the storage battery E1 only supplies power for the main control unit and the timer U1, and the power consumption of the circuit is very small when the data of the sensor is not collected. When the remote measurement and control terminal is in a dormant state, if data acquisition is needed at this time, the main control unit can output a positive pulse signal to the clock end of the trigger U2, and after the data acquisition is finished, the main control unit can output a positive pulse signal again to cut off the connection between the main control unit and the sensor, so that the main control unit and the sensor are prevented from being in a connection state for a long time, the power consumption is reduced, and the working time of the storage battery E1 is prolonged.
According to the utility model, the remote measurement and control terminal can collect the data of the sensor according to the set time, when the data of the sensor is not required to be collected, the remote measurement and control terminal is in a dormant state, and the power supply circuit only supplies power to the main control unit and the timer U1, so that the power loss of the circuit is reduced, the working time of the storage battery E1 is prolonged, and the problem of high power consumption of the remote measurement and control terminal in the prior art is solved.
The utility model will be described in further detail with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a circuit diagram of a power supply circuit according to the present utility model;
FIG. 2 is a circuit diagram of a signal processing circuit according to the present utility model;
FIG. 3 is a circuit diagram of a voltage detection circuit according to the present utility model;
fig. 4 is a circuit diagram of the voltage overrun detecting circuit in the present utility model.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1, this embodiment provides a low-power consumption remote measurement and control terminal, including master control unit, power supply circuit and wireless communication unit, power supply circuit connects master control unit, master control unit is connected with management center communication by means of wireless communication unit, power supply circuit includes battery E1, or gate U3, timer U1, trigger U2, diode D1, resistance R1, switch tube Q2 and relay K2, the first output of master control unit is connected to the first input of or gate U3, the output of timer U1 is connected to the second input of or gate U3, the clock end of trigger U2 is connected to the data communication end of timer U1, the positive pole of battery E1 is connected to the first input of trigger U2, the second input of trigger U2 is connected to the second input of trigger U2, the positive pole of diode D1 is connected to the output of trigger U2, the negative pole of diode D1 is connected to the control end of switch tube Q1 through resistance R1, the positive pole of switch tube Q1 is connected to the second input of switch tube Q2 is connected to the second input of positive pole of trigger 2, the positive pole of battery E2 is connected to the second input of switch tube Q2 is connected to the second input of positive pole of trigger 2, the positive pole of battery Q2 is connected to the second input of switch 2 is connected to the second input of positive pole of trigger 2 is connected to the second input of battery Q2.
The remote measurement and control terminal is used for receiving data acquired by an external sensor and sending the acquired data to the management center, the power supply circuit provides a working power supply for the remote measurement and control terminal, the remote measurement and control terminal can perform data acquisition once at certain intervals according to requirements, when the set time is reached, the power supply circuit works, the remote measurement and control terminal performs signal acquisition, the acquisition signal is sent to the main control unit, then the main control unit sends the acquired data to the management center through the wireless communication unit, meanwhile, the management center can also send command signals at any time, the command signals are sent to the main control unit through the wireless communication unit, and then the main control unit outputs control commands.
Specifically, the working principle of the power supply circuit is as follows: the data communication end (SCL pin and SDA pin) of the timer U1 communicates with the main control unit, the main control unit can enable the timer U1 to output positive pulse signals with a certain pulse width according to set time, when data acquisition is needed, the pulse signals are sent to the clock end (CLK pin) of the trigger U2, at the moment, the input end of the trigger U2 is connected with the positive electrode of the storage battery E1, when the clock end of the trigger U2 receives the pulse signals with rising edges, the trigger U1 outputs high-level signals, the diode D1 is conducted, the switch Q1 is conducted, the control end of the switch Q2 is changed to high level, the switch Q2 is also conducted, the relay K2 is electrically connected with the normal start end of the relay K2, at the moment, the main control unit can receive signals acquired by the sensor, the main control unit sends the acquired signals to the management center through the wireless communication unit, at the moment, the input end of the trigger U2 is still high-level, the level output by the trigger U2 is still high-level, the high-level output by the trigger U2 is still turned on, the high-level is turned off by the main control unit, the relay Q2 is turned off, and the relay Q2 is not turned off at the normal start of the three-level, and the relay Q2 is turned off, and the normal state is turned off. At this time, the remote measurement and control terminal enters a dormant state, the storage battery E1 only supplies power for the main control unit and the timer U1, and the power consumption of the circuit is very small when the data of the sensor is not collected. When the remote measurement and control terminal is in a dormant state, if data acquisition is needed at this time, the main control unit can output a positive pulse signal to the clock end of the trigger U2, and after the data acquisition is finished, the main control unit can output a positive pulse signal again to cut off the connection between the main control unit and the sensor, so that the main control unit and the sensor are prevented from being in a connection state for a long time, the power consumption is reduced, and the working time of the storage battery E1 is prolonged.
The sensor signal acquisition device is characterized in that the sensor signal acquisition device is arranged in front of the clock end of the trigger U2 or the trigger U3, and when the clock end of the trigger U2 receives any positive pulse signal of the timer U1 or the main control unit, the sensor signal acquisition device can acquire the sensor signal.
In this embodiment, the remote measurement and control terminal can collect the data of the sensor according to the set time, when the data of the sensor is not required to be collected, the remote measurement and control terminal is in a dormant state, at this time, the power supply circuit only supplies power to the main control unit and the timer U1, the power loss of the circuit is reduced, the working time of the storage battery E1 is improved, and meanwhile, the management center can wake up the remote measurement and control terminal at any time during the dormant period.
In this embodiment, a JK flip-flop is used as the flip-flop U2.
As shown in fig. 2, a signal processing circuit is arranged between the normal start end of the relay K2 and the first input end of the main control unit, the signal processing circuit comprises a resistor R8, a resistor R9, an operational amplifier U4, a resistor R10, a resistor R11, a capacitor C3, a capacitor C4 and an operational amplifier U5, the first end of the resistor R8 is connected with the normal start end of the relay K2, the second end of the resistor R8 is connected with the inverting input end of the operational amplifier U4, the non-inverting input end of the operational amplifier U4 is connected with the Vref1 reference power supply through the resistor R9, the output end of the operational amplifier U4 is connected with the inverting input end of the operational amplifier U4 through the resistor R10, the output end of the operational amplifier U4 is connected with the first end of the resistor R11, the second end of the resistor R11 is grounded through the capacitor C3, the non-inverting input end of the operational amplifier U5 is connected with the first end of the resistor R11, the output end of the operational amplifier U5 is connected with the inverting input end of the operational amplifier U5, and the output end of the operational amplifier U5 is connected with the first input end of the main control unit.
In the process of collecting sensor data, the main control unit cannot effectively identify signals output by the sensor because the electric signals output by the sensor are weak, and a signal processing circuit is arranged between the sensor and the main control unit and used for amplifying the electric signals output by the sensor.
Specifically, the signal processing circuit works according to the following principle: the op amp U4 forms an amplifying circuit for amplifying the electrical signal output by the sensor, but the electrical signal output by the external sensor may contain a large number of interference signals, which will affect the accuracy of the data, and for this purpose, the interference signals need to be filtered out. The resistor R11, the capacitor C3, the capacitor C4 and the operational amplifier U5 form a filter circuit for filtering high-frequency clutter signals and noise signals in the signals, and finally, the amplified and filtered signals are sent to the main control unit.
The passive low-pass filter circuit composed of the resistor R12 and the capacitor C5 is further arranged between the operational amplifier U5 and the main control unit, and can filter the electric signal output by the operational amplifier U5 again, so that the accuracy of data is further improved.
As shown in fig. 3, the embodiment further includes a voltage detection circuit, where the voltage detection circuit includes a resistor R4, a switch tube Q3, a resistor R5, a switch tube Q4, a resistor R6, and a resistor R7, where a first end of the resistor R4 is connected to the positive electrode of the battery E1, a second end of the resistor R4 is connected to the control end of the switch tube Q3, a first end of the switch tube Q3 is connected to the control end of the switch tube Q4, a first end of the switch tube Q3 is connected to the first end of the switch tube Q4 through the resistor R5, a second end of the switch tube Q3 is grounded, a first end of the switch tube Q4 is connected to the positive electrode of the battery E1 through the resistor R6, a second end of the resistor R7 is grounded, and a first end of the resistor R7 is connected to the second input end of the main control unit.
When the electric quantity of the storage battery E1 in the remote measurement and control terminal is too low, the remote measurement and control terminal cannot normally collect data of an external sensor, therefore, a voltage detection circuit is added in the embodiment and used for detecting the residual electric quantity condition of the storage battery E1 at fixed time, a main control unit periodically outputs a positive pulse signal according to set detection time, namely when the control end of the switch tube Q3 is at a high level, the switch tube Q3 is conducted, the control end of the switch tube Q4 becomes a low level, the switch tube Q4 is also conducted, at the moment, the anode of the storage battery E1 is grounded after passing through the switch tube Q4, the resistor R6 and the resistor R7 form a voltage division circuit, the voltage on the resistor R7 is taken as sampling voltage and is sent to a main control unit, the main control unit sends an acquisition structure to a management center through a wireless communication unit, and when workers see that the electric quantity of the storage battery E1 is lower than the set value, equipment is replaced timely so as to ensure normal data collection. When detecting the electric quantity of the battery E1, the voltage detection circuit consumes a part of the electric energy of the battery E1, and detects the electric quantity of the battery E1 at intervals to avoid excessive loss of the electric quantity.
As shown in fig. 4, the embodiment further includes a voltage overrun detecting circuit, where the voltage overrun detecting circuit includes a resistor R13, a resistor R14, a resistor R15, an operational amplifier U6 and a diode D3, a first end of the resistor R13 is connected to the positive electrode of the storage battery E1, a second end of the resistor R13 is connected to the first end of the resistor R15 through the resistor R14, a second end of the resistor R15 is grounded, a non-inverting input end of the operational amplifier U6 is connected to the second end of the resistor R13, an inverting input end of the operational amplifier U6 is connected to the Vref2 reference power supply, an output end of the operational amplifier U6 is connected to the anode of the diode D3, and a cathode of the diode D3 is connected to the third input end of the main control unit.
The remote measurement and control terminal is a special computer measurement and control unit with a modularized structure, which is designed aiming at longer communication distance and severe industrial field environment, and because the working environment is complex, the output voltage of the storage battery E1 can be unstable in the working process, when the output voltage of the storage battery E1 suddenly becomes very high, the current in a circuit can be increased, so that components in the circuit are burnt, and therefore, the voltage overrun detection circuit is added in the embodiment.
The positive electrode of the storage battery E1 and the voltage between the positive electrode and the ground through a resistor R13, a resistor R14 and a resistor R15, the resistor R13, the resistor R14 and the resistor R15 form a voltage dividing circuit, the operational amplifier U6 forms a comparison circuit, the voltages on the resistor R14 and the resistor R15 are taken as sampling voltages to be added to the non-inverting input end of the operational amplifier U6, the inverting input end of the operational amplifier U6 is a reference voltage, when the sampling voltage of the non-inverting input end of the operational amplifier U6 is higher than the reference voltage of the inverting input end of the operational amplifier U6, the operational amplifier U6 outputs a high-level signal, the high-level signal is sent to the main control unit after being sent to the main control unit through a diode D3, and when the main control unit receives the high-level signal, the output voltage of the storage battery E1 exceeds a normal voltage. The signal is simultaneously sent to the management center for the staff to take corresponding measures.
As shown in fig. 4, the voltage overrun detecting circuit in this embodiment further includes an operational amplifier U7 and a diode D4, the non-inverting input end of the operational amplifier U7 is connected to the Vref2 reference power supply, the inverting input end of the operational amplifier U7 is connected to the first end of the resistor R15, the output end of the operational amplifier U7 is connected to the anode of the diode D4, and the cathode of the diode D4 is connected to the fourth input end of the main control unit.
When the voltage output by the storage battery E1 becomes very low, the remote measurement and control terminal cannot work normally, therefore, the operational amplifier U7 forms an undervoltage detection circuit, the voltage on the resistor R15 is taken as the sampling voltage to be added to the inverting input end of the operational amplifier U7, the non-inverting input end of the operational amplifier U7 is taken as the reference voltage, when the output voltage of the storage battery E1 is lower than a set value, the voltage of the inverting input end of the operational amplifier U7 is lower than the voltage of the non-inverting input end of the operational amplifier U7, the operational amplifier U7 outputs a high-level signal to the main control unit, when the main control unit receives the high-level signal output by the operational amplifier U7, the undervoltage condition of the storage battery E1 is indicated, and the management center is informed of the undervoltage condition.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (5)
1. The low-power-consumption remote measurement and control terminal is characterized by comprising a main control unit, a power supply circuit and a wireless communication unit, wherein the power supply circuit is connected with the main control unit, the main control unit is in communication connection with a management center by means of the wireless communication unit, the power supply circuit comprises a storage battery E1, an OR gate U3, a timer U1, a trigger U2, a diode D1, a resistor R1, a switching tube Q1, a resistor R2, a switching tube Q2 and a relay K2,
the first input end of the OR gate U3 is connected with the first output end of the main control unit, the second input end of the OR gate U3 is connected with the output end of the timer U1, the data communication end of the timer U1 is connected with the main control unit, the output end of the OR gate U3 is connected with the clock end of the trigger U2, the first input end of the trigger U2 is connected with the positive electrode of the storage battery E1, the first input end of the trigger U2 is connected with the second input end of the trigger U2, the output end of the trigger U2 is connected with the positive electrode of the diode D1,
the cathode of the diode D1 is connected with the control end of the switch tube Q1 through the resistor R1, the first end of the switch tube Q1 is connected with the anode of the storage battery E1, the cathode of the storage battery E1 is grounded, the second end of the switch tube Q1 is connected with the control end of the switch tube Q2 through the resistor R2, the first end of the switch tube Q2 is connected with the first input end of the relay K2, the second input end of the relay K2 is connected with the anode of the storage battery E1, the common end of the relay K2 is used for being connected with a sensor acquisition signal, the normally open end of the relay K2 is connected with the first input end of the main control unit, and the second end of the switch tube Q2 is grounded.
2. The low-power-consumption remote measurement and control terminal according to claim 1, wherein a signal processing circuit is arranged between a normal open end of the relay K2 and a first input end of the main control unit, the signal processing circuit comprises a resistor R8, a resistor R9, an operational amplifier U4, a resistor R10, a resistor R11, a capacitor C3, a capacitor C4 and an operational amplifier U5, the first end of the resistor R8 is connected with the normal open end of the relay K2, a second end of the resistor R8 is connected with an inverting input end of the operational amplifier U4, a non-inverting input end of the operational amplifier U4 is connected with a Vref1 reference power supply through the resistor R9, an output end of the operational amplifier U4 is connected with a first end of the resistor R11, a second end of the resistor R11 is grounded through the capacitor C3, a second end of the resistor R11 is connected with an inverting input end of the operational amplifier U5, a non-inverting input end of the operational amplifier U4 is connected with an inverting input end of the operational amplifier U5 through the resistor R10, and an output end of the operational amplifier U5 is connected with the inverting input end of the operational amplifier U5.
3. The low-power-consumption remote measurement and control terminal according to claim 1, further comprising a voltage detection circuit, wherein the voltage detection circuit comprises a resistor R4, a switch tube Q3, a resistor R5, a switch tube Q4, a resistor R6 and a resistor R7, a first end of the resistor R4 is connected with the positive electrode of the storage battery E1, a second end of the resistor R4 is connected with the control end of the switch tube Q3, a first end of the switch tube Q3 is connected with the control end of the switch tube Q4, a first end of the switch tube Q3 is connected with the first end of the switch tube Q4 through the resistor R5, a second end of the switch tube Q3 is grounded, a first end of the switch tube Q4 is connected with the positive electrode of the storage battery E1, a second end of the switch tube Q4 is connected with the first end of the resistor R7 through the resistor R6, a second end of the resistor R7 is grounded, and a first end of the resistor R7 is connected with the second input end of the main control unit.
4. The low-power-consumption remote measurement and control terminal according to claim 1, further comprising a voltage overrun detection circuit, wherein the voltage overrun detection circuit comprises a resistor R13, a resistor R14, a resistor R15, an operational amplifier U6 and a diode D3, a first end of the resistor R13 is connected with the positive electrode of the storage battery E1, a second end of the resistor R13 is connected with the first end of the resistor R15 through the resistor R14, a second end of the resistor R15 is grounded, a non-inverting input end of the operational amplifier U6 is connected with the second end of the resistor R13, an inverting input end of the operational amplifier U6 is connected with a Vref2 reference power supply, an output end of the operational amplifier U6 is connected with the anode of the diode D3, and a cathode of the diode D3 is connected with a third input end of the main control unit.
5. The low-power consumption remote measurement and control terminal according to claim 4, wherein the voltage overrun detection circuit further comprises an operational amplifier U7 and a diode D4, wherein the non-inverting input end of the operational amplifier U7 is connected with a Vref2 reference power supply, the inverting input end of the operational amplifier U7 is connected with the first end of the resistor R15, the output end of the operational amplifier U7 is connected with the anode of the diode D4, and the cathode of the diode D4 is connected with the fourth input end of the main control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321547544.0U CN220171415U (en) | 2023-06-16 | 2023-06-16 | Low-power-consumption remote measurement and control terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321547544.0U CN220171415U (en) | 2023-06-16 | 2023-06-16 | Low-power-consumption remote measurement and control terminal |
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