CN112165069A - Protection circuit, use method thereof and coronary artery analysis system - Google Patents

Protection circuit, use method thereof and coronary artery analysis system Download PDF

Info

Publication number
CN112165069A
CN112165069A CN201911202621.7A CN201911202621A CN112165069A CN 112165069 A CN112165069 A CN 112165069A CN 201911202621 A CN201911202621 A CN 201911202621A CN 112165069 A CN112165069 A CN 112165069A
Authority
CN
China
Prior art keywords
circuit
module
voltage
input
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911202621.7A
Other languages
Chinese (zh)
Inventor
孔祥通
陈艾骎
霍云飞
刘广志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Rainmed Medical Technology Co Ltd
Original Assignee
Suzhou Rainmed Medical Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Rainmed Medical Technology Co Ltd filed Critical Suzhou Rainmed Medical Technology Co Ltd
Priority to CN201911202621.7A priority Critical patent/CN112165069A/en
Priority to PCT/CN2019/122912 priority patent/WO2021103068A1/en
Publication of CN112165069A publication Critical patent/CN112165069A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/02007—Evaluating blood vessel condition, e.g. elasticity, compliance
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Physiology (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Cardiology (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Medical Informatics (AREA)
  • Physics & Mathematics (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The application provides a protection circuit, a using method thereof and a coronary artery analysis system, wherein the protection circuit comprises an input circuit and an output circuit, the output end of the input circuit is connected with the input end of the output circuit, the input end of the input circuit is connected with the output end of a power supply, and the output end of the output circuit is connected with external electric equipment; the input circuit comprises a conduction circuit module and an overvoltage suppression module which are connected in series; the output circuit comprises an undervoltage detection module, an undervoltage protection module and a power supply module which are connected in parallel, and the conduction circuit module is used for supplying power to the power supply module; the overvoltage suppression module is used for disconnecting and conducting the circuit module when high voltage or overvoltage occurs; the undervoltage detection module is used for detecting whether undervoltage condition occurs to the voltage, and a power supply module or an undervoltage protection module is adopted for supplying power to external electric equipment. The problem of cause ageing, damage or unsatisfied consumer requirement of voltage to consumer when appearing excessive pressure or under-voltage phenomenon among the prior art has been solved in this application.

Description

Protection circuit, use method thereof and coronary artery analysis system
Technical Field
The invention relates to the technical field of coronary artery medicine, in particular to a protection circuit, a using method thereof and a coronary artery analysis system.
Background
The power supply of the mobile equipment is often subjected to power supply conversion, abnormal power supply and power supply failure.
Common electrical faults include: 1) the overvoltage surge phenomenon appears at the input end of the input circuit, so that the mobile electric equipment is damaged or the mobile electric equipment is aged and accelerated; 2) the input end of the input circuit has an undervoltage surge phenomenon, which can not meet the power supply requirements of electric equipment and can not reach all specified performance indexes.
In order that the power supply system does not affect the working condition of the mobile equipment electrical system in any power supply state, the application researches a protection circuit.
Disclosure of Invention
The invention provides a protection circuit, a using method thereof and a coronary artery analysis system, which are used for solving the problems that the electric equipment is aged and damaged or the voltage does not meet the requirements of the electric equipment when an overvoltage or undervoltage surge phenomenon occurs in the prior art.
To achieve the above object, in a first aspect, the present application provides a protection circuit comprising: the output end of the input circuit is connected with the input end of the output circuit, the input end of the input circuit is connected with the output end of the power supply, and the output end of the output circuit is connected with external electric equipment;
the input circuit comprises a conduction circuit module and an overvoltage suppression module which are connected in parallel;
the output circuit comprises an undervoltage detection module, an undervoltage protection module and a power supply module which are connected in parallel,
the conduction circuit module is used for supplying power to the power supply module;
the overvoltage suppression module is used for disconnecting the input end of the input circuit to supply power for the conduction circuit module when the input end of the input circuit has peak high voltage or overvoltage surge;
the under-voltage detection module is used for detecting whether the voltage output by the conduction circuit module has an under-voltage surge condition, if the output voltage is a normal electricity utilization voltage, the conduction circuit module is conducted with the power supply module, and the power supply module is used for supplying power to external electricity utilization equipment; if the undervoltage surge phenomenon occurs, the conduction circuit module is connected with the undervoltage protection module, and the undervoltage protection module supplies power for external electric equipment.
Optionally, in the protection circuit, the conduction circuit module is a PMOS transistor.
Optionally, in the protection circuit described above, the PMOS transistor includes: source S, triode Q2And a voltage stabilizing tube D2Resistance R3Resistance R4And a resistance R5；
The input end of the input circuit is connected with one end of the source electrode S;
the triode Q2And a voltage stabilizing tube D2Resistance R5The two ends of the parallel connection are respectively connected with the other end of the source S and the input end of the output circuit;
the input end of the input circuit is connected with the source electrode S through the resistor R in series3The resistor R4And (4) grounding.
Optionally, in the protection circuit described above, the overvoltage suppression module includes: voltage stabilizing tube D1Resistance R1Resistance R2Capacitor C1Triode Q1Resistance R6Triode Q3And a resistance R7；
The voltage stabilizing tube D1Resistance R1In series, the voltage-stabilizing tube D1Is connected to the input circuit input and the R3Between the input ends, said R1The output end of the transformer is grounded;
the resistor R2Is connected to the voltage regulator tube D1And the output end of the resistor R1Between the input terminals of, the said R2And the output end of the triode Q1The base electrode of (1) is connected;
the capacitor C1Is connected to the R2The capacitor C is connected with the triode1The output end of the transformer is grounded;
the triode Q1Collector electrode of (2) is connected with a resistor R in sequence6Triode Q3The base of said triode Q1The emitter of (2) is grounded;
the resistor R7The input end of the resistor R is connected to the conducting circuit module7And the output end of the triode Q3Is connected with the collector of the triode Q3The emitter of (2) is grounded.
Optionally, in the protection circuit described above, the power supply module includes: diode D3Resistance R8And a resistance R9；
The diode D3The input end of the diode D is connected with the output end of the conduction circuit module3The output end of the power supply is connected with the external electric equipment;
the resistor R8And the resistance R9In series, the resistance R8The input end of the switch-on circuit module is connected with the output end of the switch-on circuit module, R9The output terminal of which is grounded.
Optionally, in the protection circuit described above, the under-voltage detection module includes: operational amplifier OP1 and capacitor C2；
The operational amplifier circuit OP1Is connected to the resistor R8And the resistance R9To (c) to (d); the operational amplifier circuit OP1And the output end of the capacitor C2Is connected to the input terminal of the capacitor C2The output terminal of which is grounded.
Optionally, in the protection circuit described above, the under-voltage protection module includes: boost circuit, double-control switch circuit and capacitor C3；
The double-control switch circuit comprises a switch, a first open circuit and a second open circuit, wherein the switch is used for being connected with the first open circuit or the second open circuit to form a closed circuit;
the input end of the booster circuit is connected to the R8And the diode D3Between the input terminals of the first and second capacitors, the output terminal of the boost circuit is connected to the first open circuit and the capacitor C, respectively2The input ends of the two-way valve are connected;
the capacitor C3Is connected to the switch, the capacitor C3The output end of the transformer is grounded;
the end of the second open circuit is connected between the output end of the diode and an external electric device.
Optionally, in the protection circuit, if the voltage at the input end of the input circuit is 24V, the voltage D is measured1、D2Selecting a 24V voltage regulator tube, Q2The output voltage is 24V; the R is1Is 2-3K omega, R2And R6Are all 4-5K omega, R3、R4、R5、R7All are 8-12K omega, and the capacitor C1～C3The capacitance of any capacitor is 0.05-0.3 muF.
In a second aspect, the present application provides a method for using a protection circuit, including:
assembling the protection circuit;
if the voltage input by the input end of the input circuit has the phenomenon of peak high voltage or overvoltage surge, the overvoltage suppression module works, the conduction circuit module does not work, and the power supply module cannot supply power to external electric equipment;
if the voltage input by the input end of the input circuit is normal working voltage, the overvoltage suppression module is not conducted, the conduction circuit module works, and the voltage input by the input end of the input circuit is transmitted to the output circuit through the conduction circuit module;
if the voltage output by the conduction circuit module is normal working voltage, the external electric equipment is powered through the power supply module, the switch is connected with the first open circuit, and the booster circuit is a capacitor C3Charging;
if the undervoltage detection module detects that the voltage output by the conduction circuit module has an undervoltage surge phenomenon, the conduction circuit module is connected with the undervoltage protection module, and the undervoltage protection module supplies power for external electric equipment.
Optionally, in the method for using the protection circuit, if a voltage input by the input terminal of the input circuit has a spike high voltage or an overvoltage surge phenomenon, the overvoltage suppression module is turned on, the conduction circuit module is not turned on, and the power supply module cannot supply power to the external power consumption device includes:
if the voltage input by the input end of the input circuit has the phenomenon of peak high voltage or overvoltage surge, the voltage-stabilizing tube D1Is broken down and conducted, and the voltage reaches the triode Q1The base of said triode Q1Resistance R after conduction3Via a triode Q1Ground, resistance R6The voltage at the input end is a triode Q1A conduction voltage drop between the emitter and the collector, the conduction voltage drop being less than that of the transistor Q3The base turn-on voltage of (1);
triode Q1After conduction, MOS tube Q2The voltage of the grid is consistent with the input end of the input circuit, the conduction condition is not met, the conduction circuit module is not conducted, and the power supply module cannot supply power for external electric equipment.
Optionally, in the method for using the protection circuit, if the under-voltage detection module detects that the voltage output by the conduction circuit module has an under-voltage surge phenomenon, the conduction circuit module is connected to the under-voltage protection module, and the method for supplying power to the external power consumption device by the under-voltage protection module includes:
if the resistance R is9The voltage at both ends is instantaneously reduced, and the operational amplifier circuit OP1Outputting a low level, namely detecting that the voltage output by the conducting circuit module has an under-voltage surge phenomenon by an under-voltage detection module;
connecting the switch to a second open circuit, capacitor C3And supplying power to the external power consumption equipment.
In a third aspect, the present application provides a coronary artery analysis system comprising: workstation and foretell protection circuit, protection circuit with the workstation is connected.
The beneficial effects brought by the scheme provided by the embodiment of the application at least comprise:
the application provides a protection circuit, which comprises an input circuit and an output circuit, wherein the input circuit comprises a conduction circuit module and an overvoltage suppression module which are connected in parallel; the output circuit comprises an undervoltage detection module, an undervoltage protection module and a power supply module which are connected in parallel; if the input end of the input circuit has an overvoltage surge phenomenon, the overvoltage suppression module enables the conduction circuit module to be not conducted, so that the voltage at the input end of the input circuit does not supply power to external electric equipment any more, and the external electric equipment is protected; if the undervoltage detection module monitors that the voltage of the input circuit has an undervoltage surge phenomenon, the undervoltage protection module supplies power to the external electric equipment, and the voltage can meet the power consumption requirement of the external electric equipment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a block diagram of a protection circuit according to the present application;
fig. 2 is a circuit diagram of the input circuit 100 of the present application;
FIG. 3 is a circuit diagram of an output circuit 200 of the present application;
FIG. 4 is a flow chart of a method of using the protection circuit of the present application;
fig. 5 is a flowchart of S200;
fig. 6 is a flowchart of S500;
the following reference numerals are used for the description:
the circuit comprises an input circuit 100, a conducting circuit module 110, an overvoltage suppression module 120, an output circuit 200, an undervoltage detection module 210, an undervoltage protection module 220, a booster circuit 221, a double-control switch circuit 222 and a power supply module 230.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
Common electrical faults include: 1) the overvoltage surge phenomenon appears at the input end of the input circuit, so that the mobile electric equipment is damaged or the mobile electric equipment is aged and accelerated; 2) the input end of the input circuit has an undervoltage surge phenomenon, which can not meet the power supply requirements of electric equipment and can not reach all specified performance indexes.
In order that the power supply system does not affect the working condition of the mobile equipment electrical system in any power supply state, the application researches a protection circuit.
Example 1:
as shown in fig. 1, the present application provides a protection circuit including: the power supply comprises an input circuit 100 and an output circuit 200, wherein an output end A of the input circuit 100 is connected with an input end X of the output circuit 200, an input end O of the input circuit 100 is connected with an output end of a power supply, and an output end Z of the output circuit 200 is connected with external electric equipment; the input circuit 100 includes a conduction circuit module 110 and an overvoltage suppression module 120 connected in series; the output circuit 200 includes an under-voltage detection module 210, an under-voltage protection module 220 and a power supply module 230 connected in parallel, and the conduction circuit module 110 is used for supplying power to the power supply module 230; the overvoltage suppression module 120 is used for preventing the voltage at the input end of the input circuit from supplying power to the external electric equipment when the input end O of the input circuit 100 has peak high voltage or overvoltage surge, so as to protect the external electric equipment; the under-voltage detection module 210 is configured to detect whether an under-voltage surge condition occurs in the voltage output by the conduction circuit module 110, and if the output voltage is a normal power consumption voltage, the conduction circuit module 110 is conducted with the power supply module 230, and power is supplied to an external power consumption device through the power supply module 230; if the under-voltage surge phenomenon occurs, the circuit module 110 is connected with the under-voltage protection module 220, the under-voltage protection module 220 supplies power to the external electric equipment, and the voltage can meet the power consumption requirement of the external electric equipment.
In one embodiment of the present application, the turn-on circuit module 110 is a PMOS transistor.
As shown in fig. 2, in an embodiment of the present application, a PMOS transistor includes: source S, triode Q2And a voltage stabilizing tube D2Resistance R3Resistance R4And a resistance R5(ii) a The input terminal O of the input circuit 100 is connected to one end of the source S; triode Q2And a voltage stabilizing tube D2Resistance R5The two ends of the parallel connection are respectively connected with the other end of the source S and the input end X of the output circuit 200; the input terminal O and the source S of the input circuit 100 are connected in series through a resistor R3Resistance R4And (4) grounding. If the input terminal O of the input circuit 100 is in the normal voltage working condition, the conducting circuit module 110 is in the conducting state, taking the input voltage as 24V _ VIN as an example, since 24V _ VIN is smaller than the voltage regulator tube D1The regulated voltage value of the triode Q1The base of the transistor is low level, the triode Q1Is not conducted; due to the resistance R3And a resistance R4There is voltage consumption, so that the voltage division phenomenon will occur, therefore, the triode Q3Base electrode B of3At a high level, the transistor Q3On, resistance R5And a resistor R7Via a triode Q3The grounding forms a closed loop; resistance R5And a resistor R7Is connected with a triode Q2The voltage of the gate G is lower than the voltage of the source S connected to the input terminal O of the input circuit 100 after being divided by the resistor, so as to satisfy the conduction condition of the PMOS transistor, and the input voltage is input to the input terminal X of the output circuit 200 through the PMOS transistor.
As shown in fig. 2, in one embodiment of the present application, the overvoltage suppression module 120 includes: voltage stabilizing tube D1Resistance R1Resistance R2Capacitor C1Triode Q1Resistance R6Triode Q3And a resistance R7(ii) a Voltage stabilizing tube D1Resistance R1Series voltage-stabilizing tube D1Is connected to input terminals O and R of the input circuit3Between the input terminals, R1The output end of the transformer is grounded; resistance R2Is connected with a voltage regulator tube D1Output terminal and resistor R1Between the input terminals of R2Output terminal of and triode Q1The base electrode of (1) is connected; capacitor C1Is connected to R2A capacitor C connected to the triode1The output end of the transformer is grounded; triode Q1Collector electrode F of1In turn with a resistance R6Triode Q3Base electrode B of3Connected by a triode Q1Emitter electrode E of1Grounding; resistance R7Is connected to the on-circuit module 110, and a resistor R7Output terminal of and triode Q3Collector electrode F of3Connected by a triode Q3Emitter electrode E of3And (4) grounding. If the input end O of the input circuit 100 has the phenomenon of peak voltage or overvoltage surge, the voltage regulator tube D1Is broken down and conducted by avalanche, the voltage of the input end O of the input circuit 100 passes through a voltage regulator tube D1Then, is a triode Q1Base B1Providing a conduction voltage, a triode Q1Resistance R after conduction3Via a triode Q1Ground, resistance R6The voltage at input terminal Y is triode Q1Emitter electrode E of1Collector F1The conduction voltage drop between the two transistors is about 0.3V under the general condition, and 0.3V is smaller than that of the triode Q3Base B3On-state voltage of the transistor Q3Is not conducted, therefore, the MOS transistor Q2The voltage of the gate G of (1) is consistent with the voltage of the input terminal O of the input circuit 100, and the input terminal O of the input circuit 100 cannot pass through the MOS transistor Q without meeting the conduction condition2And into the output circuit 200, thereby protecting the output circuit 200 from over-voltage problems.
The input circuit 100 configured as described above can convert the voltage at the power input terminal into a stable voltage, so as to stably supply power to the external power consumption device.
As shown in fig. 3, in one embodiment of the present application, the power supply module 230 includes: diode D3Resistance R8And a resistance R9(ii) a Diode D3Is connected to the output a of the input circuit 100, and a diode D3The output end of the power supply is connected with external electric equipment; resistance R8And a resistor R9Series connected, resistance R8Input terminal X of1Connected to input X of output circuit 200, R9The output end of the transformer is grounded; the input terminal X of the output circuit 200 is connected to the output terminal a of the input circuit 100.
As shown in fig. 3, in an embodiment of the present application, the brown-out detection module 210 includes: operational amplifier circuit OP1And a capacitor C2(ii) a Operational amplifier circuit OP1Is connected to the resistor R8And a resistor R9The cathode is connected with a constant power supply, such as a 12V constant power supply; operational amplifier circuit OP1Output terminal and capacitor C2Input terminal X of2Connection, capacitance C2The output terminal of which is grounded.
As shown in fig. 3, in an embodiment of the present application, the undervoltage protection module 220 includes: boost circuit 221, double-control switch circuit 222 and capacitor C3(ii) a The dual-control switch circuit 222 comprises a switch A, a first open circuit M0 and a second open circuit M1, wherein the switch A is used for being connected with the first open circuit M0 or the second open circuit M1 to form a closed circuit; the input terminal of the booster circuit 221 is connected to R8Input terminal of and diode D3Between the input terminals of the voltage boosting circuit 221, the output terminal of the voltage boosting circuit 221 is connected with the first open circuit M0 and the capacitor C, respectively2The input ends of the two-way valve are connected; capacitor C3Is connected with a switch A, a capacitor C3The output end of the transformer is grounded; the end of the second open circuit M1 is connected to the diode D3Between the output terminal of (a) and an external consumer.
In one embodiment of the present application, if the voltage at the power input is 24V, D1、D2Selecting 24V stabilivolt, Q2The output voltage is 24V; r1Is 2-3K omega, R2And R6Are all 4-5K omega, R3、R4、R5、R7All are 8-12K omega, and a capacitor C1～C3The capacity of any capacitor is 0.05-0.3 muF; preferably, R1Is 2.2 K.OMEGA.R2And R6Are all 4.7K omega, R3、R4、R5、R7Are all 10K omega, and a capacitor C1～C3The capacitance of any capacitor is 0.1 muF.
Example 2:
as shown in fig. 4, the present application provides a method for using a protection circuit, including:
s100, assembling the protection circuit;
s200, if a spike high voltage or an overvoltage surge occurs in the voltage input by the input terminal O of the input circuit 100, the overvoltage suppression module 120 is turned on, the conduction circuit module 110 is turned off, and the power supply module 230 cannot supply power to the external power device, as shown in fig. 5, including:
s210, if the voltage input by the input end O of the input circuit 100 has the phenomenon of peak high voltage or overvoltage surge, the voltage regulator tube D1Is broken down and conducted, and the voltage reaches the triode Q1Base electrode B of1Triode Q1Resistance R after conduction3Via a triode Q1Ground, resistance R6The voltage at the input end is a triode Q1Emitter E1Collector F1The conduction voltage drop between is less than that of the triode Q3The base turn-on voltage of (1);
s220, a triode Q1After conduction, MOS tube Q2The voltage of the gate G of the input circuit 100 is consistent with the voltage of the input terminal O of the input circuit 100, and does not satisfy the conduction condition, the conduction circuit module 110 is not conducted, and the power supply module 230 cannot supply power to the external electric device;
s300, if the voltage input by the input terminal O of the input circuit 100 is the normal operating voltage, the overvoltage suppressing module 120 is not turned on, the conduction circuit module 110 is turned on, and the voltage input by the input terminal O of the input circuit 100 is transmitted to the output circuit 200 through the conduction circuit module 110;
s400, if the voltage output by the conduction circuit module 110 is the normal working voltage, the voltage is output by the power supply module 230Supplying power to external electric equipment; the switch is connected with the first open circuit, and the booster circuit is a capacitor C3Charging;
s500, if the under-voltage detection module 210 detects that the voltage output by the conduction circuit module 110 has the under-voltage surge phenomenon, the conduction circuit 110 is connected to the under-voltage protection module 220, and the under-voltage protection module 220 supplies power to the external power consumption device, as shown in fig. 6, including:
s510, if the voltage at the two ends of the resistor R9 is reduced instantaneously, the operational amplifier OP1Outputting a low level, that is, the under-voltage detection module 210 detects that the voltage output by the conduction circuit module 110 has an under-voltage surge phenomenon;
s520, connecting the switch A with a second open circuit M1, and connecting the capacitor C3And supplying power to the external power consumption equipment.
The present application provides a coronary artery analysis system comprising: workstation and foretell protection circuit, protection circuit are connected with the workstation.
The above-mentioned embodiments of the present invention, which further illustrate the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned embodiments are only examples of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A protection circuit, comprising: the output end of the input circuit is connected with the input end of the output circuit, the input end of the input circuit is connected with the output end of the power supply, and the output end of the output circuit is connected with external electric equipment;
the input circuit comprises a conduction circuit module and an overvoltage suppression module which are connected in series;
the output circuit comprises an undervoltage detection module, an undervoltage protection module and a power supply module which are connected in parallel,
the conduction circuit module is used for supplying power to the power supply module;
the overvoltage suppression module is used for disconnecting the input end of the input circuit to supply power for the conduction circuit module when the input end of the input circuit has peak high voltage or overvoltage surge;
the under-voltage detection module is used for detecting whether the voltage output by the conduction circuit module has an under-voltage surge condition, if the output voltage is a normal electricity utilization voltage, the conduction circuit module is conducted with the power supply module, and the power supply module is used for supplying power to external electricity utilization equipment; if the undervoltage surge phenomenon occurs, the conduction circuit module is connected with the undervoltage protection module, and the undervoltage protection module supplies power for external electric equipment.
2. The protection circuit of claim 1, wherein the pass circuit module is a PMOS transistor.
3. The protection circuit of claim 2, wherein the PMOS transistor comprises: source S, triode Q2And a voltage stabilizing tube D2Resistance R3Resistance R4And a resistance R5；
The input end of the input circuit is connected with one end of the source electrode S;
the triode Q2And a voltage stabilizing tube D2Resistance R5The two ends of the parallel connection are respectively connected with the other end of the source S and the input end of the output circuit;
the input end of the input circuit is connected with the source electrode S through the resistor R in series3The resistor R4And (4) grounding.
4. The protection circuit of claim 3, wherein the overvoltage suppression module comprises: voltage stabilizing tube D1Resistance R1Resistance R2Capacitor C1Triode Q1Resistance R6Triode Q3And a resistance R7；
The voltage stabilizing tube D1Resistance R1In series, the voltage-stabilizing tube D1Is connected to the input end ofIs connected with the input end of the input circuit and the R3Between the input ends, said R1The output end of the transformer is grounded;
the resistor R2Is connected to the voltage regulator tube D1And the output end of the resistor R1Between the input terminals of, the said R2And the output end of the triode Q1The base electrode of (1) is connected;
the capacitor C1Is connected to the R2The capacitor C is connected with the triode1The output end of the transformer is grounded;
the triode Q1Collector electrode of (2) is connected with a resistor R in sequence6Triode Q3The base of said triode Q1The emitter of (2) is grounded;
the resistor R7The input end of the resistor R is connected to the conducting circuit module7And the output end of the triode Q3Is connected with the collector of the triode Q3The emitter of (2) is grounded.
5. The protection circuit of claim 3, wherein the power supply module comprises: diode D3Resistance R8And a resistance R9；
The diode D3The input end of the diode D is connected with the output end of the conduction circuit module3The output end of the power supply is connected with the external electric equipment;
the resistor R8And the resistance R9In series, the resistance R8The input end of the switch-on circuit module is connected with the output end of the switch-on circuit module, R9The output terminal of which is grounded.
6. The protection circuit of claim 5, wherein the brown-out detection module comprises: operational amplifier circuit OP1And a capacitor C2；
The positive input end of the operational amplifier circuit OP1 is connected with the resistor R8And the resistance R9To (c) to (d); output end of the operational amplifier circuit OP1And the capacitor C2Is connected to the input terminal of the capacitor C2The output terminal of which is grounded.
7. The protection circuit of claim 6, wherein the undervoltage protection module comprises: boost circuit, double-control switch circuit and capacitor C3；
The double-control switch circuit comprises a switch, a first open circuit and a second open circuit, wherein the switch is used for being connected with the first open circuit or the second open circuit to form a closed circuit;
the input end of the booster circuit is connected to the R8And the diode D3Between the input terminals of the first and second capacitors, the output terminal of the boost circuit is connected to the first open circuit and the capacitor C, respectively2The input ends of the two-way valve are connected;
the capacitor C3Is connected to the switch, the capacitor C3The output end of the transformer is grounded;
the end of the second open circuit is connected between the output end of the diode and an external electric device.
8. The protection circuit of claim 7, wherein if the voltage at the input of the input circuit is 24V, then D is1、D2Selecting a 24V voltage regulator tube, Q2The output voltage is 24V; the R is1Is 2-3K omega, R2And R6Are all 4-5K omega, R3、R4、R5、R7All are 8-12K omega, and the capacitor C1～C3The capacitance of any capacitor is 0.05-0.3 muF.
9. A method of using a protection circuit, comprising:
assembling the protection circuit of any one of claims 1 to 8;
if the voltage input by the input end of the input circuit has the phenomenon of peak high voltage or overvoltage surge, the overvoltage suppression module works, the conduction circuit module does not work, and the power supply module cannot supply power to external electric equipment;
if the voltage input by the input end of the input circuit is normal working voltage, the overvoltage suppression module is not conducted, the conduction circuit module works, and the voltage input by the input end of the input circuit is transmitted to the output circuit through the conduction circuit module;
if the voltage output by the conduction circuit module is normal working voltage, power is supplied to external electric equipment through a power supply module;
if the undervoltage detection module detects that the voltage output by the conduction circuit module has an undervoltage surge phenomenon, the conduction circuit module is connected with the undervoltage protection module, and the undervoltage protection module supplies power for external electric equipment.
10. The method for using the protection circuit according to claim 9, wherein if the voltage inputted from the input terminal of the input circuit has a spike high voltage or an overvoltage surge phenomenon, the overvoltage suppression module is turned on, the conduction circuit module is not turned on, and the power supply module cannot supply power to the external electric device comprises:
if the voltage input by the input end of the input circuit has the phenomenon of peak high voltage or overvoltage surge, the voltage-stabilizing tube D1Is broken down and conducted, and the voltage reaches the triode Q1The base of said triode Q1Resistance R after conduction3Via a triode Q1Ground, resistance R6The voltage at the input end is a triode Q1A conduction voltage drop between the emitter and the collector, the conduction voltage drop being less than that of the transistor Q3The base turn-on voltage of (1);
triode Q1After conduction, MOS tube Q2The voltage of the grid is consistent with the input end of the input circuit, the conduction condition is not met, the conduction circuit module is not conducted, and the power supply module cannot supply power for external electric equipment.
11. The method for using the protection circuit according to claim 10, wherein if the under-voltage detection module detects that the voltage outputted by the conducting circuit module has an under-voltage surge phenomenon, the conducting circuit module is connected to the under-voltage protection module, and the method for supplying power to the external power consumption device by the under-voltage protection module includes:
if the resistance R is9The voltage at both ends is instantaneously reduced, and the operational amplifier circuit OP1Outputting a low level, namely detecting that the voltage output by the conducting circuit module has an under-voltage surge phenomenon by an under-voltage detection module;
connecting the switch to a second open circuit, capacitor C3And supplying power to the external power consumption equipment.
12. A coronary artery analysis system, comprising: a workstation and a protection circuit as claimed in any one of claims 1 to 8, the protection circuit being connected to the workstation.
CN201911202621.7A 2019-11-29 2019-11-29 Protection circuit, use method thereof and coronary artery analysis system Pending CN112165069A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201911202621.7A CN112165069A (en) 2019-11-29 2019-11-29 Protection circuit, use method thereof and coronary artery analysis system
PCT/CN2019/122912 WO2021103068A1 (en) 2019-11-29 2019-12-04 Protective circuit and method for use thereof and coronary artery analysis system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911202621.7A CN112165069A (en) 2019-11-29 2019-11-29 Protection circuit, use method thereof and coronary artery analysis system

Publications (1)

Publication Number Publication Date
CN112165069A true CN112165069A (en) 2021-01-01

Family

ID=73859359

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911202621.7A Pending CN112165069A (en) 2019-11-29 2019-11-29 Protection circuit, use method thereof and coronary artery analysis system

Country Status (2)

Country Link
CN (1) CN112165069A (en)
WO (1) WO2021103068A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202004425U (en) * 2010-11-19 2011-10-05 四川九洲电器集团有限责任公司 Protection circuit for realizing precise undervoltage-overvoltage and overcurrent
US10243350B2 (en) * 2015-06-11 2019-03-26 Ze Chen Protection circuit and ground fault circuit interrupter
CN104953568B (en) * 2015-07-17 2017-11-07 江苏雪梅制冷设备有限公司 A kind of fault protecting method of flexible direct current power transmission system
CN106059336B (en) * 2016-08-01 2019-03-22 成都芯源系统有限公司 Integrated circuit for a switching converter circuit and method for providing a supply voltage for an integrated circuit
CN206135387U (en) * 2016-09-30 2017-04-26 杭州鸿雁智能科技有限公司 Undervoltage protection circuit is crossed to self -resuming

Also Published As

Publication number Publication date
WO2021103068A1 (en) 2021-06-03

Similar Documents

Publication Publication Date Title
CN101867168B (en) Power protecting circuit and LED lamp
CN103236787B (en) Capacity discharge method and circuit
CN205453114U (en) Power supply surge inhibitor with prevent joining conversely function
US9667055B2 (en) Over-voltage protection apparatus and method of operating the same
CN103683206B (en) Input over-and under-voltage protection circuit and method with high voltage startup
CN107528298B (en) Protection circuit of electronic load and electronic load
CN101841149A (en) Power source protection circuit and LED lamp
CN105762781A (en) Surge current control circuit and power supply device
CN216086450U (en) Distribution switch circuit who possesses current sampling and voltage sampling
CN211183377U (en) Protection circuit and coronary artery analysis system
CN101523679B (en) Power supply and electronic ballast with auxiliary protection circuit
CN103312166A (en) Power management circuit and electronic device
CN208445268U (en) A kind of PoE and adapter duplicate supply system protection circuit
CN212875375U (en) Low-impedance direct-current undervoltage overvoltage reverse connection protection circuit
CN109613968A (en) Power supply redundant output circuit with short-circuit protection
TW201328118A (en) Uninterruptible power supply system
CN201466716U (en) Surge protection circuit
CN208904649U (en) A kind of power supply overvoltage protection circuit of high pressure barricade
CN112165069A (en) Protection circuit, use method thereof and coronary artery analysis system
CN107645180B (en) A kind of low starting current power-supply circuit for cable monitoring
CN107425599B (en) Surge protection circuit for power supply compensator
US20220320870A1 (en) Direct current power supply system, photovoltaic system, energy storage system, and optical storage system
CN207603205U (en) A kind of overvoltage, current foldback circuit
CN207184070U (en) A kind of low starting current power-supply circuit for cable monitoring
CN108233353A (en) The anti-overvoltage surge cascade module of two-stage

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination