CN109975645B - Optical isolation wide voltage range electric leakage monitoring alarm module - Google Patents
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- CN109975645B CN109975645B CN201910264560.0A CN201910264560A CN109975645B CN 109975645 B CN109975645 B CN 109975645B CN 201910264560 A CN201910264560 A CN 201910264560A CN 109975645 B CN109975645 B CN 109975645B
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Abstract
The invention discloses an optical isolation wide voltage range leakage monitoring alarm module which comprises a leakage monitoring module, a resistance acquisition bridge module and an alarm signal output module, wherein the leakage monitoring module comprises a first input end P4, a second input end P5 and a neon bulb LED1, the leakage monitoring module is used for connecting a shell of a detected device, the resistance acquisition bridge module and the leakage monitoring module are arranged oppositely, the resistance acquisition bridge module comprises a resistor R1, a resistor R2, an amplifier U1A, a first power supply V1, a photosensitive resistor RG1 and a resistor R8 and is used for detecting the illumination intensity of the neon bulb LED1 so as to acquire the change of the photosensitive resistor RG1, the alarm signal output module is connected with the resistance acquisition bridge module, and the alarm signal output module comprises a triode Q1, a second power supply V2, a relay K1 and a voice alarm and is used for outputting leakage alarm signals to realize leakage testing of a chassis shell.
Description
Technical Field
The invention relates to the technical field of electric leakage measurement and control, in particular to an optical isolation wide voltage range electric leakage monitoring and alarming module.
Background
The leakage detection alarm module is mainly divided into current detection and voltage detection according to the detection principle. The current detection principle module generally uses a current mutual inductor or a hall element to detect a flowing current to judge whether the current leaks, and belongs to isolated detection, but a path through which a leakage current flows needs to be determined before detection, so that the current detection principle module is not suitable for detecting whether the chassis shell leaks. The voltage detection principle is divided into two modes of voltage transformation and voltage division isolation, a voltage transformation module generally converts high voltage into low voltage for detection through a transformer or a voltage transformer, the method is high in cost, the voltage division isolation is generally realized through voltage division by a resistor and isolation by an optical coupler, the voltage range detected by the method is greatly influenced by the optical coupler parameters, the detection voltage range is narrow, the actual case shell leakage or induced leakage voltage range can exist from dozens of volts to kilovolt, and safety accidents are easy to happen.
Disclosure of Invention
The invention aims to provide an optical isolation wide-voltage-range leakage monitoring alarm module, and aims to solve the problems of complex circuit, high cost and narrow detection range of the leakage monitoring alarm module.
In order to achieve the purpose, the invention provides an optical isolation wide voltage range leakage monitoring and alarming module, which comprises a leakage monitoring module, a resistance acquisition bridge module and an alarming signal output module, wherein the leakage monitoring module is used for connecting a shell of a detected device, the resistance acquisition bridge module is arranged opposite to the leakage monitoring module, and the alarming signal output module is connected with the resistance acquisition bridge module and used for outputting a leakage alarming signal;
the leakage monitoring module comprises a first input end P4, a second input end P5 and a neon bulb LED1, wherein the first input end P4 is used for being connected with a zero line of a chassis, the second input end P5 is used for being connected with a shell of the chassis, the anode of the neon bulb LED1 is connected with the first input end P4, and the cathode of the neon bulb LED1 is connected with the second input end P5;
the resistance acquisition bridge module comprises a resistor R1, a resistor R2, an amplifier U1A, a first power supply V1, a photoresistor RG1 and a resistor R8, wherein a first end of the resistor R1, a first end of the resistor R2 and an eighth end of the amplifier U1A are connected with the first power supply V1, the photoresistor RG1 is arranged opposite to the neon bulb LED1, a first end of the photoresistor RG1 is connected with a second end of the resistor R1 and a second end of the amplifier U1A, a first end of the resistor R8 is connected with a second end of the resistor R2, and a second end of the photoresistor RG1, a second end of the resistor R8 and a fourth end of the amplifier U1A are all connected with a ground end;
alarm signal output module includes triode Q1, second power V2, relay K1, audible alarm, triode Q1's base with amplifier U1A's first end is connected, triode Q1's collecting electrode relay K1's positive pole and negative pole with second power V2 connects, relay K1's output P1 connects audible alarm.
Wherein, the leakage monitoring module still includes resistance R3, resistance R4, resistance R9 and resistance R10, resistance R3's first end with first input end P4 is connected, resistance R4's first end with resistance R3's second end is connected, resistance R4's second end with neon bulb LED 1's positive pole is connected, resistance R9's first end is connected with second input end P5, resistance R10's first end is connected with resistance R9's second end, resistance R10's second end with neon bulb LED 1's negative pole is connected.
The leakage monitoring module further comprises a resistor R7, a first end of the resistor R7 is connected with a second end of the resistor R4 and the anode of the neon bulb LED1, and a second end of the resistor R10 is connected with the cathode of the neon bulb LED1.
The leakage monitoring module further comprises an adjustable resistor R6, and the adjustable resistor R6 is connected with the resistor R7 in parallel.
The alarm signal output module further comprises a resistor R5, wherein the first end of the resistor R5 is connected with the first end of the amplifier U1A, and the second end of the resistor R5 is connected with the base electrode of the triode Q1.
The alarm signal output module further comprises a resistor R11, a first end of the resistor R11 is connected with a second end of the resistor R5 and the base of the triode Q1, and a second end of the resistor R11 is connected with the ground end.
The alarm signal output module further comprises a diode D1, the anode of the diode D1 is connected with the collector of the triode Q1 and the cathode of the relay K1, and the cathode of the diode D1 is connected with the second power supply V2 and the anode of the relay K1.
The alarm signal output module further comprises an internet of things collector, and the internet of things collector is connected with the output end P3 of the relay K1.
According to the optical isolation wide voltage range leakage monitoring alarm module, the leakage monitoring module comprises the first input end P4, the second input end P5 and the neon bulb LED1, the leakage monitoring module is used for being connected with a shell of a device to be detected, the resistance acquisition bridge module is arranged opposite to the leakage monitoring module, the resistance acquisition bridge module comprises the resistor R1, the resistor R2, the amplifier U1A, the first power supply V1, the photoresistor RG1 and the resistor R8 and is used for detecting the illumination intensity of the neon bulb LED1 so as to acquire the change of the photoresistor RG1, the alarm signal output module is connected with the resistance acquisition bridge module, and the alarm signal output module comprises the triode Q1, the second power supply V2, the relay K1 and the voice alarm and is used for outputting a leakage alarm signal so as to realize leakage testing of a chassis shell.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow diagram of an optical isolation wide voltage range leakage monitoring alarm module of the present invention;
FIG. 2 is a schematic circuit diagram of an optical isolation wide voltage range leakage monitoring alarm module of the present invention;
in the figure: 100-leakage monitoring module, 200-resistance acquisition bridge module and 300-alarm signal output module.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 2, the invention provides an optical isolation wide voltage range leakage monitoring and alarming module, which includes a leakage monitoring module 100, a resistance collection bridge module 200 and an alarm signal output module 300, wherein the leakage monitoring module 100 is used for connecting a housing of a device to be detected, the resistance collection bridge module 200 is arranged opposite to the leakage monitoring module 100, and the alarm signal output module 300 is connected with the resistance collection bridge module 200 and is used for outputting a leakage alarm signal;
the leakage monitoring module 100 comprises a first input end P4, a second input end P5 and a neon bulb LED1, wherein the first input end P4 is used for connecting a zero line of a chassis, the second input end P5 is used for connecting a shell of the chassis, an anode of the neon bulb LED1 is connected with the first input end P4, and a cathode of the neon bulb LED1 is connected with the second input end P5;
the resistance acquisition bridge module 200 comprises a resistor R1, a resistor R2, an amplifier U1A, a first power supply V1, a photoresistor RG1 and a resistor R8, wherein a first end of the resistor R1, a first end of the resistor R2 and an eighth end of the amplifier U1A are connected to the first power supply V1, the photoresistor RG1 is arranged opposite to the neon bulb LED1, a first end of the photoresistor RG1 is connected to a second end of the resistor R1 and a second end of the amplifier U1A, a first end of the resistor R8 is connected to a second end of the resistor R2, and a second end of the photoresistor RG1, a second end of the resistor R8 and a fourth end of the amplifier U1A are all connected to a ground terminal;
alarm signal output module 300 includes triode Q1, second power V2, relay K1, audible alarm, triode Q1's base with amplifier U1A's first end is connected, triode Q1's collecting electrode relay K1's positive pole and negative pole with second power V2 connects, relay K1's output P1 connects audible alarm.
In this embodiment, neon bulb LED1 is a bulb tube of colorless inert gas, and can generate orange glow with strong projection force under the excitation of an electric field, the operating current is 0.015 to 10mA, and the glow is generated when the withstand voltage is 60V-1500v,60v, and the first input end P4 is connected with the zero line of the chassis, the second input end P5 is connected with the chassis shell, and when the chassis shell is electrified, a loop is formed, and current passes through neon bulb LED1. The current flowing through the neon LED1 is about 0.064mA when the input terminal has an ac voltage of 60V, and about 1.607mA when the input terminal has an ac voltage of 1500V, which range enables the neon LED1 to glow. The photoresistor RG1 is based on an internal photoelectric effect, namely, current carriers generated by illumination all participate in conduction and do drift motion under the action of an external electric field, electrons rush to the anode of a power supply, and holes rush to the cathode of the power supply, so that the resistance value of the photoresistor RG1 is rapidly reduced, the higher the illumination is, the lower the resistance value is, and the resistance value is rapidly reduced along with the increase of illumination intensity. The neon bulb LED lighting lamp is characterized in that the photosensitive resistor RG1 and the neon bulb LED1 are arranged oppositely, the resistance value of the photosensitive resistor RG1 is larger than or equal to 3M omega under a dark condition, when the neon bulb LED1 shines, the distance between the neon bulb LED1 and the photosensitive resistor RG1 is adjusted, the resistance value of the photosensitive resistor is 25-50K omega, and the neon bulb LED1 and the photosensitive resistor RG1 are reliably isolated, so that safety is ensured. The resistor R1, the resistor R2, the resistor R8 and the amplifier U1A form a resistor acquisition bridge, the resistor acquisition bridge is an instrument for measuring various resistance values by using a comparison method, the amplifier U1A is a double operational amplifier, and two independent operational amplifiers with high gain and internal frequency compensation are arranged inside the amplifier U1A. By collecting the change of the photoresistor, the output voltage of the amplifier U1A changes, the triode Q1, the relay K1 and the voice alarm are driven by the relay to output, and the relay K1 is an electric control device and is an electric appliance which enables controlled quantity to generate preset step change in an electric output circuit when the change of input quantity meets the specified requirement. The relay K1 is driven to be attracted or disconnected through the output voltage change of the amplifier U1A, so that the alarm effect is achieved. The first power supply V1 provides kinetic energy for the resistance collection bridge module 200, and the second power supply V2 provides kinetic energy for the alarm signal output module 300. The triode Q1 is a semiconductor device for controlling current, and functions to amplify a weak signal into an electrical signal with a large amplitude value, and also functions as a contactless switch. When electricity is detected, the amplifier U1A outputs 12V to enable the triode Q1 to be conducted, so that the relay K1 is driven to suck the output end P1 to perform alarm processing; when no electricity is detected, the amplifier U1A outputs 0V, the triode Q1 is not conducted, and the relay K1 is disconnected. The optical isolation wide voltage range leakage monitoring alarm module is simpler in circuit implementation, low in cost, more flexible in detection loop and wide in detection range, can greatly reduce the leakage detection alarm implementation cost, improves economic benefits, and can realize detection and alarm no matter outdoor commercial power or high voltage of a factory.
According to the optical isolation wide voltage range leakage monitoring alarm module, the leakage monitoring module 100 comprises the first input end P4, the second input end P5 and the neon bulb LED1, the leakage monitoring module 100 is used for connecting a shell of a device to be detected, the resistance collection bridge module 200 is arranged opposite to the leakage monitoring module 100, the resistance collection bridge module 200 comprises the resistor R1, the resistor R2, the amplifier U1A, the first power supply V1, the photoresistor RG1 and the resistor R8 and is used for detecting the illumination intensity of the neon bulb LED1 so as to collect the change of the photoresistor RG1, the alarm signal output module 300 is connected with the resistance collection bridge module 200, the alarm signal output module 300 comprises the triode Q1, the second power supply V2, the relay K1 and the voice alarm and is used for outputting a leakage alarm signal, so that a leakage test on a chassis shell is realized, the circuit structure is simple, the cost is low, and the detection range is wide.
Further, leakage monitoring module 100 still includes resistance R3, resistance R4, resistance R9 and resistance R10, resistance R3's first end with first input end P4 is connected, resistance R4's first end with resistance R3's second end is connected, resistance R4's second end with neon bulb LED 1's positive pole is connected, resistance R9's first end is connected with second input end P5, resistance R10's first end is connected with resistance R9's second end, resistance R10's second end with neon bulb LED 1's negative pole is connected. In this embodiment, the resistor R3, the resistor R4, the resistor R9, and the resistor R10 are current limiting resistors and also function as a rectifier.
Further, the leakage monitoring module 100 further includes a resistor R7, a first end of the resistor R7 is connected to the second end of the resistor R4 and the anode of the neon bulb LED1, and a second end of the resistor R10 is connected to the second end of the resistor R1 and the cathode of the neon bulb LED1. In the present embodiment, the resistor R7 is connected in parallel with the neon bulb LED1 for shunting, thereby preventing the neon bulb LED1 from being burned out due to an excessive circuit current.
Further, the leakage monitoring module 100 further includes an adjustable resistor R6, and the adjustable resistor R6 is connected in parallel with the resistor R7. In this embodiment, the adjustable resistor R6 is a resistor with an adjustable resistance value to meet the circuit requirement, and is used to adjust the resistance value according to the circuit current magnitude to adjust the resistance value, so as to shunt and protect the neon bulb LED1 and the resistor R7.
Further, the alarm signal output module 300 further includes a resistor R5, a first end of the resistor R5 is connected to the first end of the amplifier U1A, and a second end is connected to the base of the triode Q1. In this embodiment, the resistor R5 is used for limiting current, so as to prevent the amplifier U1A from being damaged due to excessive current of the circuit.
Further, the alarm signal output module 300 further includes a resistor R11, a first end of the resistor R11 is connected to the second end of the resistor R5 and the base of the transistor Q1, and a second end of the resistor R11 is connected to the ground. In this embodiment, the resistor R11 is used for shunting, and when the circuit current is too large, the resistor is directly connected to the ground, so that the triode Q1 is prevented from being burned out, and the service life of components is prolonged.
Further, the alarm signal output module 300 further includes a diode D1, the anode of the diode D1 is connected to the collector of the triode Q1 and the cathode of the relay K1, and the cathode of the diode D1 is connected to the anode of the second power supply V2 and the relay K1. In this embodiment, the diode D1 allows current to pass only in a single direction, and blocks current in the reverse direction. After the triode Q1 is turned on, the current can only flow from the anode of the diode D1 to the cathode of the diode D1 and then to the anode of the relay K1 to the cathode of the relay K1, so as to form a loop, and the second power supply V2 can only flow to the anode of the relay K1, so as to provide kinetic energy for the alarm signal output module 300.
Further, the alarm signal output module 300 further includes an internet of things collector, and the internet of things collector is connected with the output end P3 of the relay K1. In this embodiment, when the indoor electric leakage of computer lab results in the shell electrified, alarm signal output module 300 output closure signal arouses voice alarm, simultaneously data are uploaded to the monitoring center to the thing networking collector and the personnel of noticing are handled in time, effectively avoid the occurence of failure.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An optical isolation leakage monitoring alarm module with wide voltage range is characterized in that,
the leakage detection device comprises a leakage monitoring module, a resistance acquisition bridge module and an alarm signal output module, wherein the leakage monitoring module is used for connecting a shell of a detected device, the resistance acquisition bridge module is arranged opposite to the leakage monitoring module, and the alarm signal output module is connected with the resistance acquisition bridge module and used for outputting a leakage alarm signal;
the leakage monitoring module comprises a first input end P4, a second input end P5 and a neon bulb LED1, wherein the first input end P4 is used for being connected with a zero line of a chassis, the second input end P5 is used for being connected with a shell of the chassis, the anode of the neon bulb LED1 is connected with the first input end P4, and the cathode of the neon bulb LED1 is connected with the second input end P5;
the resistance acquisition bridge module comprises a resistor R1, a resistor R2, an amplifier U1A, a first power supply V1, a photoresistor RG1 and a resistor R8, wherein a first end of the resistor R1, a first end of the resistor R2 and an eighth end of the amplifier U1A are connected with the first power supply V1, the photoresistor RG1 is arranged opposite to the neon bulb LED1, a first end of the photoresistor RG1 is connected with a second end of the resistor R1 and a second end of the amplifier U1A, a first end of the resistor R8 is connected with a second end of the resistor R2, and a second end of the photoresistor RG1, a second end of the resistor R8 and a fourth end of the amplifier U1A are all connected with a ground end;
alarm signal output module includes triode Q1, second power V2, relay K1, audible alarm, triode Q1's base with amplifier U1A's first end is connected, triode Q1's collecting electrode relay K1's positive pole and negative pole with second power V2 connects, relay K1's output P1 connects audible alarm.
2. The optical isolation wide voltage range leakage monitor alarm module of claim 1,
the electric leakage monitoring module still includes resistance R3, resistance R4, resistance R9 and resistance R10, resistance R3's first end with first input end P4 is connected, resistance R4's first end with resistance R3's second end is connected, resistance R4's second end with neon bulb LED 1's positive pole is connected, resistance R9's first end is connected with second input end P5, resistance R10's first end is connected with resistance R9's second end, resistance R10's second end with neon bulb LED 1's negative pole is connected.
3. The optically isolated wide voltage range leakage monitor alarm module of claim 2,
the leakage monitoring module further comprises a resistor R7, a first end of the resistor R7 is connected with a second end of the resistor R4 and the anode of the neon bulb LED1, and a second end of the resistor R10 is connected with the cathode of the neon bulb LED1.
4. The optical isolation wide voltage range leakage monitor alarm module of claim 3,
the leakage monitoring module further comprises an adjustable resistor R6, and the adjustable resistor R6 is connected with the resistor R7 in parallel.
5. The optical isolation wide voltage range leakage monitor alarm module of claim 1,
the alarm signal output module further comprises a resistor R5, wherein the first end of the resistor R5 is connected with the first end of the amplifier U1A, and the second end of the resistor R5 is connected with the base electrode of the triode Q1.
6. The optical isolation wide voltage range leakage monitor alarm module of claim 5,
the alarm signal output module further comprises a resistor R11, the first end of the resistor R11 is connected with the second end of the resistor R5 and the base of the triode Q1, and the second end of the resistor R11 is connected with the ground end.
7. The optically isolated wide voltage range leakage monitor alarm module of claim 1,
the alarm signal output module further comprises a diode D1, the anode of the diode D1 is connected with the collector of the triode Q1 and the cathode of the relay K1, and the cathode of the diode D1 is connected with the anode of the second power supply V2 and the anode of the relay K1.
8. The optical isolation wide voltage range leakage monitor alarm module of claim 1,
alarm signal output module still includes the thing networking collector, the thing networking collector with relay K1's output P3 is connected.
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