Non-contact low-power-consumption circuit system for intelligent valve positioner
By using a non-contact reed switch and a power consumption limiting circuit, the problems of shortened lifespan and safety hazards caused by contact switches are solved. At the same time, the power supply management of the circuit module is optimized, achieving low power consumption and high safety.
Patent Information
- Application Number
- CN202520279868.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-02-21
AI Technical Summary
Traditional valve positioners use contact switches, which shorten their lifespan and create safety hazards. Furthermore, the unnecessary circuit modules continuously supply power, resulting in wasted energy.
A non-contact reed switch is used to detect changes in the magnetic field and control the circuit switch. A power consumption limiting circuit disconnects the power supply to the circuit module when it is not in use. Combined with a coil drive self-protection circuit, it prevents malfunctions caused by power instability.
It improves the service life and safety of valve positioners, reduces power consumption, and lowers operating costs.
Smart Images
Figure CN223815515U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to intelligent valve control technical field, concretely is a kind of non-contact low-power circuit system for intelligent valve positioner. BACKGROUND
[0002] Valve positioner plays an important role in regulating valve, it can increase the output power of regulating valve, reduce the occurrence of regulating signal transmission lag, speed up the moving speed of valve stem, can improve the linearity of valve, overcome the friction of valve stem and eliminate the influence of unbalance force, to ensure the correct positioning of regulating valve.
[0003] The switch of traditional valve positioner often uses contact switch, the metal part of switch is contacted by artificial external force, and then the switch is closed, so there will be contact wear problem, long time will affect service life, and the electric arc generated by contact switch can cause safety hazard;And in the design and use process of valve positioner, some circuit modules are not needed to be used in the whole working cycle.If the circuit is still connected to power supply at this time, it will lead to power loss and waste of electric energy. SUMMARY
[0004] In order to solve the above technical problems, the utility model provides a kind of non-contact low-power circuit system for intelligent valve positioner, it can remotely control switch, avoid the service life and safety hazard problem caused by switch when contact, and can effectively reduce the power consumption of valve positioner, reduce use cost.
[0005] Its technical scheme is as follows: a kind of non-contact low-power circuit system for intelligent valve positioner, it includes valve positioner module, it is characterized in that, the valve positioner module connects remote control switch circuit and power consumption limiting circuit;
[0006] The remote control switch circuit includes reed switch, and the reed switch detects external magnet signal to close or open circuit;
[0007] The power consumption limiting circuit is provided with switch module to control whether circuit module is powered.
[0008] Further, the remote control switch circuit comprises a reed switch S1 and a reed switch S2, one end of the reed switch S1 is connected with VDD, the other end is connected with one end of a resistor R41 and one end of a resistor R43, the other end of the resistor R43 is grounded, the other end of the resistor R41 is connected with a capacitor C42 and is a first voltage signal output terminal, one end of the reed switch S2 is connected with a power supply VDD, the other end is connected with one end of a resistor R42 and one end of a resistor R44, the other end of the resistor R44 is grounded, the other end of the resistor R42 is connected with a capacitor C43 and is a second voltage signal output terminal, the other end of the capacitor C42 and the other end of the capacitor C43 are both grounded;
[0009] The power consumption limiting circuit comprises a PMOS tube Q3 and an NMOS tube Q4, one end of a resistor R66 and one end of a resistor R67 are connected with the gate end of the PMOS tube Q3, the other end of the resistor R66 is connected with one end of a capacitor C2, the source end of the PMOS tube Q3, and a power supply VDD, the drain end of the PMOS tube Q3 is connected with one end of a capacitor C3 and a power supply VAA, the other end of the capacitor C2 and the other end of the capacitor C3 are both grounded, the other end of the resistor R67 is connected with the drain end of the NMOS tube Q4, the source end of the NMOS tube Q4 is grounded, and one end of a resistor R61 and one end of a resistor R65 are connected with the gate end of the NMOS tube Q4, the other end of the resistor R65 is grounded, and the other end of the resistor R61 is a control port;
[0010] The valve positioner module is further connected with a coil driving self-protection circuit, the coil driving self-protection circuit comprises a power supply monitoring chip U9, the model of which is TLV840CADL29BVR, one end of a capacitor C21 and a power supply VDD+5V are connected with the 2th pin of the power supply monitoring chip U9, one end of a capacitor C31 is connected with the 5th pin of the power supply monitoring chip U9, the 3th pin is grounded, and the 1th pin is connected with the cathode of a diode D4, the other end of the capacitor C21 and the other end of the capacitor C31 are grounded, the anode of the diode D4 is connected with one end of a resistor R37 and the gate end of a MOS tube Q2, the other end of the resistor R37 is connected with the output end of an operational amplifier U8, one end of a resistor R36 and one end of a capacitor C20 are connected with the positive phase input end of the operational amplifier, the inverting input end of the operational amplifier is connected with one end of a resistor R39 and the source end of the MOS tube Q2, one end of a resistor R35, one end of a resistor R38, and one end of a capacitor C30 are connected with the other end of the resistor R36, the other end of the resistor R35 is a current control port, the other end of the resistor R38, the other end of the capacitor C30, the other end of the capacitor C20, and the other end of the resistor R39 are all grounded, the drain end of the MOS tube Q2 is connected with the 1th pin of a coil connection port P4, one end of a capacitor C1, one end of a capacitor C29, one end of a resistor R34, and the VCC port of the operational amplifier U8 are connected with the 2th pin of the coil connection port P4, the other end of the resistor R34 is connected with a power supply VDD+5V, and the other end of the capacitor C29 and the other end of the capacitor C1 are both grounded.
[0011] After the utility model, the valve positioner module connects the remote control switch circuit and the power consumption limiting circuit, when the magnetic field changes by the magnet, the remote control switch circuit can sense the magnetic field change in the space, and then close and open the circuit, and then the control unit senses the circuit change, processes according to the control logic, when sensing that some circuit modules do not need to be used in specific conditions, the high level or low level is input to drive the power supply switch circuit, and then the circuit module is directly disconnected with the power supply, the intelligent valve positioner power consumption is reduced, the service life of the valve positioner module is improved, it is safe and reliable, and the use cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0012] Fig. 1 It is the principle diagram of the utility model;
[0013] Fig. 2 It is the principle diagram of the remote control switch circuit;
[0014] Fig. 3 It is the principle diagram of the power consumption limiting circuit;
[0015] Fig. 4 It is the coil drive self-protection circuit. DETAILED DESCRIPTION
[0016] See Figs. 1 to 4 As shown in the figure, a non-contact low-power circuit system for intelligent valve positioner includes a valve positioner module, the valve positioner module connects the remote control switch circuit, the power consumption limiting circuit and the coil drive self-protection circuit;
[0017] The remote control switch circuit includes a reed switch, the reed switch detects the external magnet signal to close or open the circuit, avoids the life wear problem and safety problem caused by the original contact type button switch;
[0018] The power consumption limiting circuit is provided with a switch module to control whether the circuit module is powered, so as to further reduce the power consumption;
[0019] The coil drive self-protection circuit monitors the power supply state through a voltage monitoring chip, sets the current output to the coil to 0 when the power supply is unstable, prevents the misoperation caused by unstable power supply and large external interference, greatly enhances the safety and anti-interference of the system.
[0020] The remote control switch circuit comprises a reed switch S1 and a reed switch S2. One end of the reed switch S1 is connected to VDD, the other end is connected to one end of a resistor R41 and one end of a resistor R43, the other end of the resistor R43 is grounded, the other end of the resistor R41 is connected to a capacitor C42 and is a first voltage signal output terminal sw_gpio1, one end of the reed switch S2 is connected to the power supply VDD, the other end is connected to one end of a resistor R42 and one end of a resistor R44, the other end of the resistor R44 is grounded, the other end of the resistor R42 is connected to a capacitor C43 and is a second voltage signal output terminal sw_gpio2, and the other end of the capacitor C42 and the other end of the capacitor C43 are both grounded. When there is no magnetic field signal outside, the reed switches S1 / S2 are disconnected, the output voltage of sw_gpio1 / 2 is 0, and the valve positioner module stops working. When a non-contact magnet is close, the reed switches S1 / S2 are closed, the output voltage of sw_gpio1 / 2 is VDD, and the valve positioner module starts working.
[0021] The power consumption limiting circuit comprises a PMOS tube Q3 and an NMOS tube Q4. One end of a resistor R66 and one end of a resistor R67 are connected to the gate of the PMOS tube Q3. The other end of the resistor R66 is connected to one end of a capacitor C2, the source of the PMOS tube Q3 and the power supply VDD. The drain of the PMOS tube Q3 is connected to one end of a capacitor C3 and the power supply VAA. The other end of the capacitor C2 and the other end of the capacitor C3 are both grounded. The other end of the resistor R67 is connected to the drain of the NMOS tube Q4. The source of the NMOS tube Q4 is grounded, and the gate is connected to one end of a resistor R61 and one end of a resistor R65. The other end of the resistor R65 is grounded, and the other end of the resistor R61 is a control port Angle_En. When some circuit modules of the valve positioner module controlled by the power consumption limiting circuit do not need to be used, the control port Angle_En is at a low level. At this time, the NMOS tube Q4 is not conductive, the gate voltage of the PMOS tube Q3 is the same as VDD, the PMOS tube Q3 is not conductive, the power supply VAA cannot be connected to VDD, and the circuit modules to be controlled have no power supply source. When the circuit module needs to be used, the control port Angle_En is at a high level, the NMOS tube Q4 is conductive, the gate voltage of the PMOS tube Q3 is connected to the ground GND, the MOS tube Q3 is conductive, the power supply VAA is connected to VDD, and the circuit modules to be controlled are powered.
[0022] The valve positioner module is also connected with a coil driving self-protection circuit, the coil driving self-protection circuit comprises a power supply monitoring chip U9, the model of which is TLV840CADL29BVR, the 2th pin of the power supply monitoring chip U9 is connected with one end of a capacitor C21 and a power supply VDD+5V, the 5th pin is connected with one end of a capacitor C31, the 3th pin is grounded, the 1th pin is connected with the cathode of a diode D4, the other end of the capacitor C21 and the other end of the capacitor C31 are grounded, the anode of the diode D4 is connected with one end of a resistor R37 and the gate end of a MOS tube Q2, the other end of the resistor R37 is connected with the output end of an operational amplifier U8, the positive input end of the operational amplifier U8 is connected with one end of a resistor R36 and one end of a capacitor C20, the inverting input end of the operational amplifier is connected with one end of a resistor R39 and the source end of the MOS tube Q2, the other end of the resistor R36 is connected with one end of a resistor R35, one end of a resistor R38 and one end of a capacitor C30, the other end of the resistor R35 is a current control port, the other end of the resistor R38, the other end of the capacitor C30, the other end of the capacitor C20 and the other end of the resistor R39 are grounded, the drain end of the MOS tube Q2 is connected with the 1th pin of a coil connection port P4, the 2th pin of the coil connection port P4 is connected with one end of a capacitor C1, one end of a capacitor C29, one end of a resistor R34 and the VCC port of the operational amplifier U8, the other end of the resistor R34 is connected with a power supply VDD+5V, and the other end of the capacitor C29 and the other end of the capacitor C1 are grounded. The voltage monitoring chip U9 is a core component of the protection circuit, and the power supply port (2th pin) thereof is a port for monitoring the stability of the power supply and is connected with the power supply VDD+5V. The OUT port (1th pin) is connected with the output port of the operational amplifier U8 and the output port of the MOS tube through the diode D4. When the external voltage VDD+5V is stable, it is generally considered that it is stable when it is greater than a certain threshold value, the OUT port outputs a high level, and due to the single-phase conduction of the diode D4, the high level does not affect the current of the coil. When the external voltage VDD+5V is unstable, it is generally considered that it is unstable when it is less than a certain threshold value, the OUT port outputs a low level, and due to the one-way conduction of the diode D4, the control voltage of the MOS tube Q2 for controlling the current of the coil is set to 0, so that the current of the coil in the valve positioner module is 0, and the current control port receives the current control signal in the valve positioner module, and the power supply monitoring chip U9 controls the current of the coil together.
[0023] The remote control switch circuit in the utility model utilizes magnetic field induction to complete signal transmission without contact, reduces abrasion and improves safety. In the past, the main chip of the circuit module is usually in a dormant state when not in use, which not only causes power consumption of the chip, but also supplies power to the auxiliary circuit. The power consumption limiting circuit can realize the on-off of a certain circuit module in the entire circuit and reduce the power consumption of the intelligent valve positioner. In the coil driving self-protection circuit, when the external power supply is unstable or the interference is large, the coil driving self-protection circuit can detect the instability and set the coil output current to 0 to prevent misoperation.
Claims
1. A contactless low power circuitry for smart valve positioner comprising a valve positioner module characterized by, The valve positioner module connects a remote control switch circuit and a power consumption limiting circuit; The remote control switch circuit includes a reed switch, which detects an external magnet signal to close or open the circuit; The power consumption limiting circuit is provided with a switch module to control whether the circuit module is powered.
2. A non-contact low power circuitry for smart valve positioner according to claim 1, wherein, The remote control switch circuit includes a reed switch S1 and a reed switch S2, one end of the reed switch S1 is connected to VDD, the other end is connected to one end of a resistor R41 and one end of a resistor R43, the other end of the resistor R43 is grounded, the other end of the resistor R41 is connected to a capacitor C42 and is a first voltage signal output end, one end of the reed switch S2 is connected to a power supply VDD, the other end is connected to one end of a resistor R42 and one end of a resistor R44, the other end of the resistor R44 is grounded, the other end of the resistor R42 is connected to a capacitor C43 and is a second voltage signal output end, the other end of the capacitor C42 and the other end of the capacitor C43 are both grounded.
3. A non-contact low power circuitry for smart valve positioner according to claim 1, wherein, The power consumption limiting circuit includes a PMOS tube Q3 and an NMOS tube Q4, one end of a resistor R66 and one end of a resistor R67 are connected to the gate end of the PMOS tube Q3, the other end of the resistor R66 is connected to one end of a capacitor C2, the source end of the PMOS tube Q3, and a power supply VDD, the drain end of the PMOS tube Q3 is connected to one end of a capacitor C3 and a power supply VAA, the other end of the capacitor C2 and the other end of the capacitor C3 are both grounded, the other end of the resistor R67 is connected to the drain end of the NMOS tube Q4, the source end of the NMOS tube Q4 is grounded, and one end of a resistor R61 and one end of a resistor R65 are connected to the gate end of the NMOS tube Q4, the other end of the resistor R65 is grounded, and the other end of the resistor R61 is a control port.
4. A non-contact low power circuitry for smart valve positioner according to claim 1, wherein, The valve positioner module is also connected with coil drive self-protection circuit, the coil drive self-protection circuit includes power supply monitoring chip U9, model is TLV840CADL29BVR, the 2 feet of power supply monitoring chip U9 are connected with the one end of capacitor C21 and power supply VDD+5V, the 5 feet are connected with the one end of capacitor C31, the 3 feet are grounded, the 1 feet are connected with the cathode of diode D4, the other end of capacitor C21 and the other end of capacitor C31 are grounded, the anode of diode D4 is connected with the one end of resistance R37 and the grid end of MOS tube Q2, the other end of resistance R37 is connected with the output end of operational amplifier U8, the positive phase input end of operational amplifier is connected with the one end of resistance R36 and the one end of capacitor C20, the inverting input end of operational amplifier is connected with the one end of resistance R39 and the source end of MOS tube Q2, the other end of resistance R36 is connected with the one end of resistance R35, the one end of resistance R38, the one end of capacitor C30, the other end of resistance R35 is current control port, the other end of resistance R38, the other end of capacitor C30, the other end of capacitor C20, the other end of resistance R39 are all grounded, the drain end of MOS tube Q2 is connected with the 1 feet of coil connection port P4, the 2 feet of coil connection port P4 is connected with the one end of capacitor C1, the one end of capacitor C29, the one end of resistance R34, the VCC port of operational amplifier U8, the other end of resistance R34 is connected with power supply VDD+5V, the other end of capacitor C29 and the other end of capacitor C1 are all grounded.