CN113451992B - MR glasses power supply protection circuit - Google Patents
MR glasses power supply protection circuit Download PDFInfo
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- CN113451992B CN113451992B CN202111023806.9A CN202111023806A CN113451992B CN 113451992 B CN113451992 B CN 113451992B CN 202111023806 A CN202111023806 A CN 202111023806A CN 113451992 B CN113451992 B CN 113451992B
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- 239000011521 glass Substances 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims description 71
- 230000002457 bidirectional effect Effects 0.000 claims description 21
- 230000000630 rising effect Effects 0.000 description 6
- 230000002401 inhibitory effect Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- 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
- H02H3/08—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 current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- 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
- H02H3/02—Details
- H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
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Abstract
The invention discloses a MR glasses power supply protection circuit, which effectively solves the problems of the MR glasses power supply protection circuit in the prior art, the current detection circuit of the invention filters the current signal detected by a current sensor U1 through a filter and then transmits the current signal to an output device, the output device calculates the current signal and then generates a difference signal, the current signal and the difference signal are transmitted to a control processing circuit, the control processing circuit compares the current signal transmitted by the current detection circuit, the high level output by comparison accelerates the current signal and then opens a relay, therefore, the protection of the circuit is started, the situation that the power supply is damaged due to the influence of the current change when the amplitude of the current signal instantaneously changes beyond a threshold value due to the influence of the power supply is avoided, and a new effective protection mode for the power supply of the MR glasses is provided.
Description
Technical Field
The invention relates to the field of MR (magnetic resonance) glasses protection, in particular to a MR glasses power supply protection circuit.
Background
At present, circuit safety is not designed in most products in electronic consumer products, once a circuit fails, although some conventional protection circuits such as fuses, voltage-sensitive circuits and the like exist, when the circuit fails, energy which can be released can still burn out protection circuit devices, such as common fuse burning and voltage-sensitive resistor breakdown burning, when the circuit fails, the circuit board is locally burnt out seriously, a large amount of smoke and taste are generated, and discomfort is brought to a user in experience. The protection method for the conventional electric appliances can meet the protection of a CPU, a power supply IC and the like, but for the head-mounted equipment such as MR, VR and the like, the requirements on safety are stricter due to the fact that the head-mounted equipment is in contact with a human body and is arranged on the head, and the head-mounted equipment such as MR, VR and the like is not suitable for the head-mounted equipment such as MR, VR and the like because the head-mounted equipment is required to be installed again after a fuse is arranged on the head and the use experience is not high.
In the prior art, CN109659924B also discloses a protection circuit and AR/VR headset, but this prior art document cannot accurately distinguish the occurrence of surge current or short-circuit fault, and the occurrence of surge current or short-circuit fault will cut off the power supply, which affects the use of AR/VR glasses.
The present invention therefore provides a new solution to this problem.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an MR glasses power supply protection circuit, which effectively solves the problems of the MR glasses protection circuit in the prior art.
The technical scheme includes that the protection circuit comprises a current detection circuit and a control processing circuit, the current detection circuit filters a current signal detected by a current sensor U1 through a filter and then transmits the current signal to an output device, the output device calculates the current signal to generate a difference signal and transmits the current signal and the difference signal to the control processing circuit, the control processing circuit compares the current signal transmitted by the current detection circuit, and the comparison output high level accelerates the current signal and then turns on a relay.
Further, the current detection circuit comprises a current sensor U1, a filter and an output device.
Furthermore, the filter comprises a resistor R1, one end of the resistor R1 is connected to the pin 2 of the current sensor U1 and one end of the capacitor C1, the other end of the resistor R1 is connected to one end of the capacitor C2 and the non-inverting end of the operational amplifier U2A, the inverting end of the operational amplifier U2A is connected to one end of the resistor R3 and one end of the resistor R4, the output end of the operational amplifier U2A is connected to the other end of the resistor R4, the other end of the resistor R3 is connected to the other end of the capacitor C2, the other end of the capacitor C1 and the pin 3 of the current sensor U1, and connected to ground, and the pin 1 of the current sensor U1 is connected to the positive power source VCC.
Further, the output device includes a capacitor C3, one end of the capacitor C3 is connected to an output end of an operational amplifier U2A in the filter, the other end of the capacitor C3 is connected to one end of a resistor R6, an anode of a diode D1 and a base of a triode Q1, a collector of the triode Q1 is connected to the other end of the resistor R6, a drain of the MOS Q6 and a pin 1 of a current sensor U1 in the filter and is connected to a positive power VCC, an emitter of the triode Q1 is connected to an emitter of the triode Q2, one end of a resistor R8, one end of a bidirectional regulator D3 and one end of a resistor R11, the other end of the bidirectional regulator D9 is connected to one end of a resistor R15, the other end of the resistor R15 is connected to one end of a capacitor C5, the other end of the resistor R8 is connected to one end of a ground resistor R9, a non-inverting end of an operational amplifier U4A, and an inverting end of an inverting amplifier R17, One end of a capacitor C8, the other end of a resistor R11, and an output end of an operational amplifier U4A are respectively connected with the other end of the resistor R17 and one end of a resistor R14, the other end of the resistor R14 is connected with a gate of a MOS transistor Q6, a source of the MOS transistor Q6 is respectively connected with one end of the resistor R18 and an anode of a diode D7, a cathode of the diode D7 is respectively connected with one end of a diac D8 and one end of the capacitor C9, the other end of the capacitor C9 is respectively connected with the other end of the resistor R18, the other end of the capacitor C5, a collector of a triode Q2, the other end of the resistor R7, the other end of the capacitor C8, and the other end of a capacitor C2 in the filter, and are connected in parallel to the ground.
Further, the control processing circuit comprises an operational amplifier U5A, a non-inverting terminal of the operational amplifier U5A is connected to a cathode of a thyristor Q5, an anode of the thyristor Q5 is connected to one end of a resistor R8 and an anode of a thyristor Q4 in the current detection circuit, a control electrode of the thyristor Q5 is connected to the other end of a diac D8 in the current detection circuit, an inverting terminal of the operational amplifier U5A is connected to an adjustable terminal of a resistor R13, an upper terminal of the resistor R13, one terminal of a resistor R12 and one terminal of a bidirectional regulator D4, the other terminal of the resistor R12 is connected to one end of a resistor R10 and the other terminal of a resistor R6 in the current detection circuit, an output terminal of the operational amplifier U5A is connected to an anode of a diode D5 and the other terminal of a bidirectional regulator D4, a cathode of a diode D5 is connected to one end of a resistor R16, and the other terminal of the resistor R16 is connected to one end of a capacitor C6, One end of a bidirectional trigger diode D6, the other end of the bidirectional trigger diode D6 is connected with a control electrode of a thyristor Q4, the cathode of the thyristor Q4 is respectively connected with one end of a resistor R2 and one end of a capacitor C7, the other end of a capacitor C7 is respectively connected with the other end of a resistor R2 and the base of a triode Q3, the collector of the triode Q3 is respectively connected with the other end of the relay and the other end of the resistor R10, the emitter of the triode Q3 is connected with one end of the resistor R19, the other end of the resistor R19 is respectively connected with the lower end of the resistor R13, the other end of the capacitor C6 and the other end of the capacitor C5 in the current detection circuit and is connected with the ground in parallel.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
(1) the current sensor U1 is arranged to detect the current signal of the circuit during operation, the filter is used to filter the current signal, the interference signal carried in the current signal, such as the interference signal generated by the power supply during power supply, is filtered out, the influence of the interference signal on the accuracy of the current signal is avoided, the accuracy of the current signal is improved, the output device is used for calculating the current signal to generate a difference signal, detecting and analyzing whether the current signal of the circuit is in a rising state or not to form the effect of monitoring the change of the current signal, the control processing circuit is conducted by using the difference signal, whether the current signal causes the short circuit of the circuit is analyzed by using the control processing circuit, when the circuit is analyzed to be about to generate short circuit, the relay is switched on by using the current signal in an accelerating way, so that the power supply is protected, and the accuracy of current signal detection is further ensured;
(2) the output device and the control processing circuit respectively carry out calculation processing and comparison processing on the current signals, so that the situation that the amplitude of the current signals instantaneously changes beyond a threshold value due to the influence of a power supply source to cause the power supply source to be damaged due to the influence of current change is avoided, and a new effective protection mode for the power supply source of the MR glasses is provided.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical and other features and advantages of the invention will be apparent from the following detailed description of the embodiments, which proceeds with reference to fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The utility model provides a MR glasses power supply protection circuit, uses on MR glasses's power supply's output, protection circuit includes current detection circuit, control processing circuit, power supply means MR glasses's battery, mostly is the lithium cell.
The current detection circuit comprises a current sensor U1, a filter and an output device, the current detection circuit detects a current signal of the circuit in operation by using a current sensor U1, the current sensor U1 adopts a Hall current sensor for detection, the Hall current sensor is the prior art and is not described in detail herein, the detected current signal carries out pi-type filtering by using a resistor R1, a capacitor C1 and a capacitor C2 in the filter, interference signals carried in the current signal such as interference signals generated when a power supply supplies power are filtered, the influence of the interference signals on the accuracy of the current signal is avoided, the current signal is compensated and amplified by using an operational amplifier U2A, the current signal is recovered to the amplitude value when the filtering is not carried out, the current signal is transmitted to the output device, the current signal is transmitted to a triode Q1 and a triode Q2 by using the capacitor C3, and the response capability of the current signal is improved, the diode D1 and the diode D2 are used for inhibiting the current signals from generating crossover distortion, the bidirectional voltage regulator tube D3 is used for inhibiting the generation of a surge phenomenon, the phenomenon that the amplitude of the current signals exceeds a threshold value due to the influence of a power supply is avoided, further the fuse is fused is avoided, the resistor R15 and the capacitor C5 are used for discharging the amplitude of partial current signals causing the surge phenomenon to the ground, the safety of the MR glasses in use is ensured, the operation of the operational amplifier U4A on the current signals is avoided being influenced, meanwhile, the resistor R11 and the capacitor C8 are used for delaying the current signals and storing the current signals on the inverting terminal of the operational amplifier U4A (the current signals are delayed until the next current signal is transmitted to the non-inverting terminal of the operational amplifier U4A), the operational amplifier U4A outputs the difference value of the current signals at the moment and the current signals at the previous moment, and amplifies the difference value signals through the MOS tube Q6, when the amplified difference signal can not conduct the diode D7, it indicates that the amplitude of the current signal is not in a rising state, and the circuit has no risk of short circuit, and when the amplified difference signal conducts the diode D7, it indicates that the amplitude of the current signal is rising, the amplified difference signal is transmitted to the diac D8 through the capacitor C9 and the diode D7, and the diac D8 transmits the amplified difference signal to the control processing circuit, and transmits the current signal to the control processing circuit.
The filter comprises a resistor R1, one end of a resistor R1 is connected with a pin 2 of a current sensor U1 and one end of a capacitor C1, the other end of the resistor R1 is connected with one end of a capacitor C2 and the same-phase end of an operational amplifier U2A, the inverting end of the operational amplifier U2A is connected with one end of the resistor R3 and one end of a resistor R4, the output end of the operational amplifier U2A is connected with the other end of the resistor R4, the other end of the resistor R3 is connected with the other end of the capacitor C2, the other end of the capacitor C1 and a pin 3 of the current sensor U1 respectively and connected with the ground, and a pin 1 of the current sensor U1 is connected with a positive power supply VCC.
The output device comprises a capacitor C3, one end of a capacitor C3 is connected with the output end of an operational amplifier U2A in the filter, the other end of the capacitor C3 is respectively connected with one end of a resistor R6, the anode of a diode D1 and the base of a triode Q1, the collector of the triode Q1 is respectively connected with the other end of the resistor R6, the drain of a MOS tube Q6 and the 1 pin of a current sensor U1 in the filter and is connected with a positive power supply VCC, the emitter of the triode Q1 is respectively connected with the emitter of the triode Q2, one end of a resistor R8, one end of a bidirectional regulator D3 and one end of a resistor R11, the other end of the bidirectional regulator D3 is connected with one end of the resistor R15, the other end of the resistor R15 is connected with one end of a capacitor C5, the other end of a resistor R8 is respectively connected with one end of a ground resistor R9 and the same phase end of an operational amplifier U4A, the opposite phase end of an operational U4A is respectively connected with one end of the resistor R17 and one end of the amplifier C8, The other end of the resistor R11 and the output end of the operational amplifier U4A are respectively connected with the other end of the resistor R17 and one end of the resistor R14, the other end of the resistor R14 is connected with the gate of the MOS transistor Q6, the source of the MOS transistor Q6 is respectively connected with one end of the resistor R18 and the anode of the diode D7, the cathode of the diode D7 is respectively connected with one end of the diac D8 and one end of the capacitor C9, the other end of the capacitor C9 is respectively connected with the other end of the resistor R18, the other end of the capacitor C5, the collector of the triode Q2, the other end of the resistor R7, the other end of the capacitor C8 and the other end of the capacitor C2 in the filter are connected in parallel to the ground.
The control processing circuit utilizes the amplified difference signal transmitted by the bidirectional trigger diode D8 to conduct the thyristor Q5, the current signal is received by the thyristor Q5 and the thyristor Q4 respectively, the thyristor Q5 transmits the current signal transmitted by the current detection circuit to the operational amplifier U5A, the operational amplifier U5A compares the current signal with a standard signal provided by voltage division of a resistor R12 and a resistor R13, the standard signal is a current threshold value, the bidirectional voltage stabilizing tube D4 is used for accelerating conversion of a comparison result, when the comparison result output by the operational amplifier U5A does not conduct the diode D5, the current of the circuit in operation is in a safe state although the current is increased, the circuit is a circuit for ensuring normal operation of the MR glasses, and when the comparison result output by the operational amplifier U5A conducts the diode D5, the current of the circuit in operation is not in a safe state, the short circuit phenomenon easily occurs, at the moment, the diode D5 conducts the thyristor Q4 through the resistor R16, the capacitor C6 and the bidirectional trigger diode D6, the thyristor Q4 conducts a current signal through the resistor R2 and the capacitor C7 to accelerate the conduction of the triode Q3, the triode Q3 conducts the relay quickly, the relay immediately breaks the connection between the circuit and the power supply to form the protection of the power supply, and the relay restores the connection between the power supply and the circuit when the working current of the circuit restores to be normal.
The control processing circuit comprises an operational amplifier U5A, wherein the in-phase end of the operational amplifier U5A is connected with the cathode of a thyristor Q5, the anode of the thyristor Q5 is respectively connected with one end of a resistor R8 in a current detection circuit and the anode of a thyristor Q4, the control electrode of the thyristor Q5 is connected with the other end of a bidirectional trigger diode D8 in the current detection circuit, the inverting end of the operational amplifier U5A is respectively connected with the adjustable end of a resistor R13, the upper end of the resistor R13, one end of a resistor R12 and one end of a bidirectional voltage-stabilizing tube D4, the other end of the resistor R12 is respectively connected with one end of a resistor R10 and the other end of a resistor R6 in the current detection circuit and a positive power supply VCC, the output end of the operational amplifier U5A is respectively connected with the anode of a diode D5 and the other end of the bidirectional voltage-stabilizing tube D4, the cathode of a diode D5 is connected with one end of a resistor R16, the other end of the resistor R16 is respectively connected with one end of a capacitor C6 and one end of the bidirectional trigger diode D6, the other end of the diac D6 is connected with a control electrode of a thyristor Q4, the cathode of the thyristor Q4 is respectively connected with one end of a resistor R2 and one end of a capacitor C7, the other end of the capacitor C7 is respectively connected with the other end of a resistor R2 and the base of a triode Q3, the collector of the triode Q3 is respectively connected with the other ends of a relay and a resistor R10, the emitter of the triode Q3 is connected with one end of a resistor R19, the other end of the resistor R19 is respectively connected with the lower end of a resistor R13, the other end of the capacitor C6 and the other end of a capacitor C5 in the current detection circuit and is connected with the ground in parallel.
When the invention is used in concrete, the current detection circuit comprises a current sensor U1, a filter and an output device, the current detection circuit carries out pi-type filtering on a detected current signal by using a resistor R1, a capacitor C1 and a capacitor C2 in the filter, interference signals carried in the current signal such as interference signals generated when a power supply supplies power are filtered, an operational amplifier U2A is used for compensating and amplifying the current signal, the current signal is transmitted to the output device, the current signal is transmitted to a triode Q1 and a triode Q2 by using a capacitor C3, the diode D1 and the diode D2 are used for inhibiting the cross-over distortion generated by the current signal, the bidirectional voltage regulator D3 is used for inhibiting the generation of a surge phenomenon, the safety of the MR glasses in use is ensured, and the current signal is delayed by using the resistor R11 and the capacitor C8 and stored on the inverting terminal of the operational amplifier U4A, the operational amplifier U4A outputs the difference between the current signal at this time and the current signal at the previous time, amplifies the difference signal through the MOS tube Q6, when the amplified difference signal turns on the diode D7, indicating that the amplitude of the current signal is rising, transmits the amplified difference signal to the diac D8 through the capacitor C9 and the diode D7, the diac D8 transmits the amplified difference signal to the control processing circuit, and transmits the current signal to the control processing circuit, the control processing circuit turns on the thyristor Q5 through the diac D8, the current signals are received through the thyristors Q5 and Q4, respectively, the thyristor Q5 transmits the current signal transmitted by the current detection circuit to the operational amplifier U5A, the operational amplifier U5A divides the current signal into a standard signal provided by the resistor R12 and the resistor R13, the bidirectional voltage regulator tube D4 is used to accelerate the conversion of the comparison result, when the comparison result output by the operational amplifier U5A does not turn on the diode D5, it indicates that the current of the circuit during operation is in a safe state although it is rising, and when the comparison result output by the operational amplifier U5A turns on the diode D5, it indicates that the current of the circuit during operation is not in a safe state, and a short circuit easily occurs, at this time, the diode D5 turns on the thyristor Q4 through the resistor R16, the capacitor C6, and the bidirectional trigger diode D6, the thyristor Q4 turns on the current signal through the resistor R2 and the capacitor C7 to accelerate the conduction of the triode Q3, the triode Q3 turns on the relay quickly, and the relay turns off the connection between the circuit and the power supply, so as to form the protection of the power supply.
The current sensor U1 is arranged to detect the current signal of the circuit during operation, the filter is used to filter the current signal, the interference signal carried in the current signal is filtered, such as the interference signal generated by the power supply when supplying power, the interference signal is prevented from influencing the accuracy of the current signal, the accuracy of the current signal is improved, the output device is used to calculate the current signal to generate a difference signal, whether the current signal of the circuit is in a rising state is detected and analyzed to form the effect of monitoring the change of the current signal, the difference signal is used to conduct the control processing circuit, the control processing circuit is used to analyze whether the current signal has the phenomenon of causing the short circuit of the circuit, when the short circuit of the circuit is analyzed, the current signal is used to conduct the relay in an accelerating way, the protection of the power supply is formed, and the accuracy of the current signal is further ensured, the output device and the control processing circuit respectively carry out calculation processing and comparison processing on the current signals, so that the problem that the amplitude of the current signals is instantaneously changed due to the influence of the power supply and exceeds a threshold value, the power supply is damaged due to the influence of the current change is avoided, and an effective protection mode for the power supply of the MR glasses is provided.
Claims (2)
1. The MR glasses power supply protection circuit is characterized by comprising a current detection circuit and a control processing circuit, wherein the current detection circuit filters a current signal detected by a current sensor U1 through a filter and then transmits the current signal to an output device, the output device calculates the current signal to generate a difference signal and transmits the current signal and the difference signal to the control processing circuit, the control processing circuit compares the current signal transmitted by the current detection circuit, and the comparison of the output high level accelerates the current signal and then turns on a relay;
the current detection circuit comprises a current sensor U1, a filter and an output device;
the filter comprises a resistor R1, one end of a resistor R1 is connected with a pin 2 of a current sensor U1 and one end of a capacitor C1, the other end of the resistor R1 is connected with one end of a capacitor C2 and the same-phase end of an operational amplifier U2A, the inverting end of the operational amplifier U2A is connected with one end of the resistor R3 and one end of a resistor R4, the output end of the operational amplifier U2A is connected with the other end of the resistor R4, the other end of the resistor R3 is connected with the other end of the capacitor C2, the other end of the capacitor C1 and a pin 3 of the current sensor U1 respectively and connected with the ground, and a pin 1 of the current sensor U1 is connected with a positive power supply VCC;
the output device comprises a capacitor C3, one end of a capacitor C3 is connected with the output end of an operational amplifier U2A in the filter, the other end of the capacitor C3 is respectively connected with one end of a resistor R6, the anode of a diode D1 and the base of a triode Q1, the collector of the triode Q1 is respectively connected with the other end of a resistor R6, the drain of a MOS tube Q6 and the pin 1 of a current sensor U1 in the filter and is connected with a positive power VCC, the emitter of the triode Q1 is respectively connected with the emitter of a triode Q2, one end of a resistor R8, one end of a bidirectional voltage regulator D3 and one end of a resistor R11, the base of the triode Q2 is respectively connected with one end of a resistor R7 and the cathode of a diode D2, the anode of a diode D2 is connected with the cathode of a diode D1, the other end of a bidirectional voltage regulator D3 is connected with one end of a resistor R15, the other end of a resistor R15 is connected with one end of a capacitor C5, and the other end of a resistor R8 is respectively connected with the ground resistor R9, The inverting terminal of the operational amplifier U4A, the inverting terminal of the operational amplifier U4A are connected to one end of a resistor R17, one end of a capacitor C8, and the other end of a resistor R11, the output terminal of the operational amplifier U4A is connected to the other end of a resistor R17 and one end of a resistor R14, the other end of the resistor R14 is connected to the gate of a MOS transistor Q6, the source of the MOS transistor Q6 is connected to one end of a resistor R18 and the anode of a diode D7, the cathode of the diode D7 is connected to one end of a diac D8 and one end of a capacitor C9, the other end of the capacitor C9 is connected to the other end of the resistor R18, the other end of the capacitor C5, the collector of a triode Q2, the other end of the resistor R7, the other end of the capacitor C8, and the other end of the capacitor C2 in the filter, and connected to ground.
2. The MR glasses power supply protection circuit according to claim 1, wherein the control processing circuit comprises an operational amplifier U5A, the non-inverting terminal of the operational amplifier U5A is connected to the cathode of a thyristor Q5, the anode of the thyristor Q5 is connected to one end of a resistor R8 in the current detection circuit and the anode of a thyristor Q4 respectively, the control terminal of the thyristor Q5 is connected to the other end of a diac D8 in the current detection circuit, the inverting terminal of the operational amplifier U5A is connected to the adjustable terminal of a resistor R13, the upper end of the resistor R13, one end of a resistor R12 and one end of a diac D4 respectively, the other end of the resistor R12 is connected to one end of a resistor R10 and the other end of a resistor R6 in the current detection circuit and connected to a positive polarity power source VCC respectively, the output terminal of the operational amplifier U5A is connected to the positive terminal of a diode D5 and the other end of a diac D4 respectively, and the negative terminal of a diode D67 5 is connected to one end of a resistor R16, the other end of the resistor R16 is connected with one end of a capacitor C6 and one end of a diac D6 respectively, the other end of the diac D6 is connected with a control electrode of a thyristor Q4, the cathode of the thyristor Q4 is connected with one end of a resistor R2 and one end of a capacitor C7 respectively, the other end of the capacitor C7 is connected with the other end of a resistor R2 and the base of a triode Q3 respectively, the collector of the triode Q3 is connected with the other end of the relay and the resistor R10 respectively, the emitter of the triode Q3 is connected with one end of the resistor R19, the other end of the resistor R19 is connected with the lower end of a resistor R13, the other end of the capacitor C6 and the other end of a capacitor C5 in the current detection circuit in parallel connection and grounding.
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| CN202111023806.9A CN113451992B (en) | 2021-09-02 | 2021-09-02 | MR glasses power supply protection circuit |
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|---|---|---|---|
| CN202111023806.9A CN113451992B (en) | 2021-09-02 | 2021-09-02 | MR glasses power supply protection circuit |
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| CN113451992A CN113451992A (en) | 2021-09-28 |
| CN113451992B true CN113451992B (en) | 2021-11-16 |
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| CN113775532B (en) * | 2021-11-11 | 2022-02-22 | 济南英华自动化技术有限公司 | Distributed cable channel on-line monitoring system |
| CN113783578B (en) * | 2021-11-11 | 2022-02-18 | 江西影创信息产业有限公司 | Communication module of MR glasses under complicated electromagnetic environment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499736A (en) * | 2013-10-22 | 2014-01-08 | 重庆长安汽车股份有限公司 | Over-current detection circuit and over-current protection circuit |
| JP2016085107A (en) * | 2014-10-24 | 2016-05-19 | ローム株式会社 | Overcurrent detection circuit and usb power supply device using the same, electronic equipment, and overcurrent detection method |
| CN106026010A (en) * | 2016-07-20 | 2016-10-12 | 合肥联信电源有限公司 | Over-current protection system for emergency power supply |
| CN207939195U (en) * | 2018-03-21 | 2018-10-02 | 中能东道集团有限公司 | New energy car battery charging short-circuit protection |
| CN113267219A (en) * | 2021-05-28 | 2021-08-17 | 兰州职业技术学院 | Intelligent network-connected automobile lithium battery detection device |
-
2021
- 2021-09-02 CN CN202111023806.9A patent/CN113451992B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499736A (en) * | 2013-10-22 | 2014-01-08 | 重庆长安汽车股份有限公司 | Over-current detection circuit and over-current protection circuit |
| JP2016085107A (en) * | 2014-10-24 | 2016-05-19 | ローム株式会社 | Overcurrent detection circuit and usb power supply device using the same, electronic equipment, and overcurrent detection method |
| CN106026010A (en) * | 2016-07-20 | 2016-10-12 | 合肥联信电源有限公司 | Over-current protection system for emergency power supply |
| CN207939195U (en) * | 2018-03-21 | 2018-10-02 | 中能东道集团有限公司 | New energy car battery charging short-circuit protection |
| CN113267219A (en) * | 2021-05-28 | 2021-08-17 | 兰州职业技术学院 | Intelligent network-connected automobile lithium battery detection device |
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| CN113451992A (en) | 2021-09-28 |
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