CN116243046A - Voltage current signal detecting system - Google Patents

Voltage current signal detecting system Download PDF

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Publication number
CN116243046A
CN116243046A CN202310431613.XA CN202310431613A CN116243046A CN 116243046 A CN116243046 A CN 116243046A CN 202310431613 A CN202310431613 A CN 202310431613A CN 116243046 A CN116243046 A CN 116243046A
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module
voltage
capacitor
resistor
signal
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Inventor
万利剑
翟敏
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Shanghai Zhaofu Precision Electronic Instrument Co ltd
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Shanghai Zhaofu Precision Electronic Instrument Co ltd
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Priority to CN202310431613.XA priority Critical patent/CN116243046A/en
Publication of CN116243046A publication Critical patent/CN116243046A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
    • 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
    • G01R31/26—Testing of individual semiconductor devices
    • G01R31/2607—Circuits therefor
    • G01R31/2632—Circuits therefor for testing diodes
    • G01R31/2635—Testing light-emitting diodes, laser diodes or photodiodes

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

The invention discloses a voltage and current signal detection system, which relates to the detection field, and comprises: the mains supply module is used for supplying 220V alternating current and outputting the 220V alternating current to the step-down rectifying and filtering module; the voltage-reducing rectification filter module is used for converting 220V alternating current into direct current and supplying the direct current to the voltage-stabilizing module; the voltage stabilizing module is used for outputting adjustable stable voltage and supplying the adjustable stable voltage to the time delay module, the signal detection module and the signal indication module; the signal sampling module is used for sampling voltage and current signals and outputting the voltage and current signals to the signal detection module; the beneficial effects of the invention are as follows: the signal indicating module provided by the invention can not only indicate whether the input voltage and the current exceed the threshold value, but also self-check whether the light-emitting diode is normal or not when the power is on, so as to prevent misjudgment caused by the abnormality of the light-emitting diode in the detection process; the signal sampling module can adjust the size of the sampling signal, so that the sampling signal can be conveniently applied in different environments.

Description

Voltage current signal detecting system
Technical Field
The invention relates to the field of detection, in particular to a voltage and current signal detection system.
Background
Voltage and current measurement techniques are widely used, and in many systems, it is necessary to detect the magnitude of the input and output current and voltage. Such as current-voltage protection/current-voltage monitoring devices, linear/switch-mode power supplies, etc.
The existing voltage and current detection equipment lacks a starting detection mechanism, when the equipment is used, if a detection circuit is abnormal, the equipment is unclear to a user, and the equipment is faulty, even damaged in serious cases, and needs improvement.
Disclosure of Invention
The present invention is directed to a voltage and current signal detection system, which solves the above-mentioned problems of the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a voltage current signal detection system comprising:
the mains supply module is used for supplying 220V alternating current and outputting the 220V alternating current to the step-down rectifying and filtering module;
the voltage-reducing rectification filter module is used for converting 220V alternating current into direct current and supplying the direct current to the voltage-stabilizing module;
the voltage stabilizing module is used for outputting adjustable stable voltage and supplying the adjustable stable voltage to the time delay module, the signal detection module and the signal indication module;
the signal sampling module is used for sampling voltage and current signals and outputting the voltage and current signals to the signal detection module;
the signal detection module is used for detecting whether the voltage and current signals exceed a threshold value or not, and outputting different voltage signals to the signal indication module according to whether the voltage and current signals exceed the threshold value or not;
the delay module is used for delaying the starting signal detection module after the circuit is electrified;
the signal indication module is used for self-checking whether a luminous fault exists when the circuit is powered on; receiving an input voltage signal of the signal detection module, and indicating the voltage and current signal conditions by light emission;
the power supply module is connected with the buck rectification filter module, the buck rectification filter module is connected with the voltage stabilizing module, the voltage stabilizing module is connected with the delay module, the signal detection module and the signal indication module, the signal sampling module is connected with the signal detection module, the delay module is connected with the signal detection module, and the signal detection module is connected with the signal indication module;
the signal indication module comprises a resistor R5, a resistor R6, a diode D3, a resistor R8 and a diode D2, wherein one end of the resistor R5 is connected with the voltage stabilizing module, the other end of the resistor R5 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with the anode of the diode D3, the cathode of the diode D3 is connected with one end of the resistor R8 and the signal detection module, the other end of the resistor R8 is connected with the anode of the diode D2, and the cathode of the diode D2 is grounded.
As still further aspects of the invention: the step-down rectifying and filtering module comprises a transformer W, a rectifier T, a capacitor C1, a capacitor C2 and an inductor L1, wherein the input end of the transformer W is connected with a mains supply module, one end of the output end of the transformer W is connected with the first end of the rectifier T, the other end of the output end of the transformer W is connected with the third end of the rectifier T, the second end of the rectifier T is grounded, the fourth end of the rectifier T is connected with one end of the capacitor C1 and one end of the inductor L1, the other end of the capacitor C1 is grounded, the other end of the inductor L1 is connected with one end of the capacitor C2 and a voltage stabilizing module, and the other end of the capacitor C2 is grounded.
As still further aspects of the invention: the voltage stabilizing module comprises a switch S1, a capacitor C3, a voltage stabilizer U1, a resistor R1, a potentiometer RP1 and a capacitor C4, wherein the input end of the voltage stabilizer U1 is connected with one end of the capacitor C3 and one end of the switch S1, the other end of the switch S1 is connected with a voltage reduction rectifying and filtering module, the other end of the capacitor C3 is grounded, the grounding end of the voltage stabilizer U1 is connected with one end of the resistor R1 and one end of the potentiometer RP1, the other end of the potentiometer RP1 is grounded, the output end of the voltage stabilizer U1 is connected with the other end of the resistor R1, one end of the capacitor C4, a delay module, a signal detection module and a signal indication module, and the other end of the capacitor C4 is grounded.
As still further aspects of the invention: the delay module comprises a MOS tube V1, a resistor R4 and a capacitor C9, wherein the D electrode of the MOS tube V1 is connected with one end of the resistor R4 and the voltage stabilizing module, the S electrode of the MOS tube V1 is connected with the signal detection module, the G electrode of the MOS tube V1 is connected with one end of the resistor R4 and one end of the capacitor C9, and the other end of the capacitor C9 is grounded.
As still further aspects of the invention: the signal sampling module comprises a capacitor C5, a resistor R2, a potentiometer RP2 and a capacitor C6, wherein one end of the resistor R2 is connected with one end of the capacitor C5, a voltage or current signal VIN, the other end of the capacitor C5 is grounded, the other end of the resistor R2 is grounded, the potentiometer RP2 is grounded, the sliding end of the potentiometer RP2 is connected with one end of the capacitor C6 and the signal detection module, and the other end of the capacitor C6 is grounded.
As still further aspects of the invention: the signal detection module comprises a resistor R3, a capacitor C7, a capacitor C8, a timer U2 and a resistor R7, wherein the model number of the timer U2 is 555, one end of the resistor R3 is connected with a No. 4 pin of the timer U2, a voltage stabilizing module, the other end of the resistor R3 is connected with one end of the capacitor C7 and a No. 6 pin of the timer U2, the other end of the capacitor C7 is grounded, a No. 5 pin of the timer U2 is grounded through the capacitor C8, a No. 1 pin of the timer U2 is grounded, a No. 8 pin of the timer U2 is connected with a delay module, a No. 3 pin of the timer U2 is connected with one end of the resistor R7, and the other end of the resistor R7 is connected with the signal indication module.
As still further aspects of the invention: the diodes D2 and D3 are light emitting diodes.
Compared with the prior art, the invention has the beneficial effects that: the signal indicating module provided by the invention can not only indicate whether the input voltage and the current exceed the threshold value, but also self-check whether the light-emitting diode is normal or not when the power is on, so as to prevent misjudgment caused by the abnormality of the light-emitting diode in the detection process; the signal sampling module can adjust the size of the sampling signal, so that the sampling signal can be conveniently applied in different environments.
Drawings
Fig. 1 is a schematic diagram of a voltage-current signal detection system.
Fig. 2 is a circuit diagram of a first portion of a voltage-current signal detection system.
Fig. 3 is a circuit diagram of a second part of a voltage-current signal detection system.
Fig. 4 is a pin diagram of a 555 timer.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.
Referring to fig. 1 and 3, a voltage-current signal detection system includes:
the mains supply module is used for supplying 220V alternating current and outputting the 220V alternating current to the step-down rectifying and filtering module;
the voltage-reducing rectification filter module is used for converting 220V alternating current into direct current and supplying the direct current to the voltage-stabilizing module;
the voltage stabilizing module is used for outputting adjustable stable voltage and supplying the adjustable stable voltage to the time delay module, the signal detection module and the signal indication module;
the signal sampling module is used for sampling voltage and current signals and outputting the voltage and current signals to the signal detection module;
the signal detection module is used for detecting whether the voltage and current signals exceed a threshold value or not, and outputting different voltage signals to the signal indication module according to whether the voltage and current signals exceed the threshold value or not;
the delay module is used for delaying the starting signal detection module after the circuit is electrified;
the signal indication module is used for self-checking whether a luminous fault exists when the circuit is powered on; receiving an input voltage signal of the signal detection module, and indicating the voltage and current signal conditions by light emission;
the power supply module is connected with the buck rectification filter module, the buck rectification filter module is connected with the voltage stabilizing module, the voltage stabilizing module is connected with the delay module, the signal detection module and the signal indication module, the signal sampling module is connected with the signal detection module, the delay module is connected with the signal detection module, and the signal detection module is connected with the signal indication module;
the signal indication module comprises a resistor R5, a resistor R6, a diode D3, a resistor R8 and a diode D2, wherein one end of the resistor R5 is connected with the voltage stabilizing module, the other end of the resistor R5 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with the anode of the diode D3, the cathode of the diode D3 is connected with one end of the resistor R8 and the signal detection module, the other end of the resistor R8 is connected with the anode of the diode D2, and the cathode of the diode D2 is grounded.
In particular embodiments: the mains supply module outputs 220V alternating current to the buck rectifying and filtering module by introducing a live wire and a zero wire.
In this embodiment: referring to fig. 2, the buck rectifying and filtering module includes a transformer W, a rectifier T, a capacitor C1, a capacitor C2, and an inductor L1, wherein an input end of the transformer W is connected to the mains supply module, one end of an output end of the transformer W is connected to a first end of the rectifier T, the other end of the output end of the transformer W is connected to a third end of the rectifier T, a second end of the rectifier T is grounded, a fourth end of the rectifier T is connected to one end of the capacitor C1 and one end of the inductor L1, the other end of the capacitor C1 is grounded, the other end of the inductor L1 is connected to one end of the capacitor C2 and the voltage stabilizing module, and the other end of the capacitor C2 is grounded.
The transformer W completes the step-down processing of alternating current, the rectifier T completes the alternating current-direct current conversion, and a filter circuit formed by the capacitor C1, the capacitor C2 and the inductor L1 carries out the filter processing on the generated direct current.
In this embodiment: referring to fig. 2, the voltage stabilizing module includes a switch S1, a capacitor C3, a voltage stabilizer U1, a resistor R1, a potentiometer RP1, and a capacitor C4, wherein an input end of the voltage stabilizer U1 is connected to one end of the capacitor C3 and one end of the switch S1, the other end of the switch S1 is connected to a buck rectifying and filtering module, the other end of the capacitor C3 is grounded, a ground end of the voltage stabilizer U1 is connected to one end of the resistor R1 and one end of the potentiometer RP1, the other end of the potentiometer RP1 is grounded, an output end of the voltage stabilizer U1 is connected to the other end of the resistor R1, one end of the capacitor C4, a delay module, a signal detection module, and a signal indication module, and the other end of the capacitor C4 is grounded.
The switch S1 is a circuit main switch, and the circuit starts to work after being pressed down; the voltage stabilizer U1 is a conventional three-terminal voltage stabilizer, the voltage between the ground terminal and the output terminal is constant, and the magnitude of the output voltage VCC is changed by adjusting the resistance value of the potentiometer RP 1.
In this embodiment: referring to fig. 3, the delay module includes a MOS tube V1, a resistor R4, a capacitor C9, where a D pole of the MOS tube V1 is connected to one end of the resistor R4, and a voltage stabilizing module, an S pole of the MOS tube V1 is connected to the signal detecting module, a G pole of the MOS tube V1 is connected to one end of the resistor R4, one end of the capacitor C9, and the other end of the capacitor C9 is grounded.
After the circuit is electrified, the voltage on the capacitor C9 is 0, the capacitor C9 is required to be charged through the resistor R4, when the charging reaches a certain degree, the MOS tube V1 is conducted, the voltage supplies power for the No. 8 pin of the timer U2 through the MOS tube V1, and the timer U2 starts to work.
In this embodiment: referring to fig. 3, the signal sampling module includes a capacitor C5, a resistor R2, a potentiometer RP2, and a capacitor C6, wherein one end of the resistor R2 is connected to one end of the capacitor C5, a voltage or current signal VIN, the other end of the capacitor C5 is grounded, the other end of the resistor R2 provides the potentiometer RP2 to be grounded, a sliding end of the potentiometer RP2 is connected to one end of the capacitor C6, and the other end of the capacitor C6 is grounded.
The voltage or current signal VIN is grounded through the resistor R2 and the potentiometer RP2, the lower half part of the sliding end of the potentiometer RP2 is a sampling part, and the sampling signal is output to the signal detection module. The magnitude of the sampling signal can be changed by adjusting the sliding end position of the potentiometer RP 2.
In this embodiment: referring to fig. 3 and fig. 4, the signal detection module includes a resistor R3, a capacitor C7, a capacitor C8, a timer U2, and a resistor R7, where the model of the timer U2 is 555, one end of the resistor R3 is connected to a pin 4 of the timer U2, a voltage stabilizing module, the other end of the resistor R3 is connected to one end of the capacitor C7, a pin 6 of the timer U2, the other end of the capacitor C7 is grounded, a pin 5 of the timer U2 is grounded through the capacitor C8, a pin 1 of the timer U2 is grounded, a pin 8 of the timer U2 is connected to a delay module, a pin 3 of the timer U2 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to the signal indication module.
When at least one of the pins 2 and 6 of the 555 timer is at a low level, the pin 3 outputs a high level, otherwise, the pin 3 outputs a high level; when the sampling signal is lower than the rated voltage of the zener diode D1, the pin 2 of the timer U2 is at a low level, and the pin 6 of the timer U2 is at a high level constantly (before the timer U2 does not work at the beginning, the capacitor C7 is charged completely and becomes at a high level); the pin 3 of the timer U2 outputs a high level; when the sampling signal is higher than the rated voltage of the zener diode D1, pin 3 of the timer U2 outputs a low level.
In this embodiment: referring to fig. 3, the diodes D2 and D3 are light emitting diodes.
When the circuit is powered on, the signal indication module works, at the moment, the circuit loop is a resistor R5-resistor R6-diode D3-resistor R8-diode D2-ground, and both the light emitting diodes D2 and D3 emit light; after the timer U2 starts to work, the pin 3 outputs a high level, the voltage drop between the resistor R6 and the resistor R7 is smaller, the diode D3 does not emit light, the current flows to be the resistor R7-the resistor R8-the diode D2, and only the diode D2 emits light; when the pin 3 of the timer U2 outputs a low level, the voltage at the resistor R7 is lower than the voltage at the resistor R8, and the current flows to be the resistor R5-the resistor R6-the diode D3-the resistor R7. When the power is on, if the light emitting diode is in fault, a user can directly observe fault information, so that the fault condition is clear in advance, and the follow-up erroneous judgment is avoided.
The working principle of the invention is as follows: the mains supply module supplies 220V alternating current and outputs the 220V alternating current to the step-down rectifying and filtering module; the voltage-reducing rectification filter module converts 220V alternating current into direct current and supplies the direct current to the voltage-stabilizing module; the voltage stabilizing module outputs adjustable stable voltage and supplies the adjustable stable voltage to the time delay module, the signal detection module and the signal indication module; the signal sampling module samples voltage and current signals and outputs the voltage and current signals to the signal detection module; the signal detection module detects whether the voltage and current signals exceed a threshold value, and outputs different voltage signals to the signal indication module according to whether the voltage and current signals exceed the threshold value; the delay module delays to start the signal detection module after the circuit is electrified; the signal indication module circuit is powered on to self-check whether a luminous fault exists or not; and receiving an input voltage signal of the signal detection module, and emitting light to indicate voltage and current signal conditions.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (7)

1. A voltage current signal detection system, characterized by:
the voltage-current signal detection system includes:
the mains supply module is used for supplying 220V alternating current and outputting the 220V alternating current to the step-down rectifying and filtering module;
the voltage-reducing rectification filter module is used for converting 220V alternating current into direct current and supplying the direct current to the voltage-stabilizing module;
the voltage stabilizing module is used for outputting adjustable stable voltage and supplying the adjustable stable voltage to the time delay module, the signal detection module and the signal indication module;
the signal sampling module is used for sampling voltage and current signals and outputting the voltage and current signals to the signal detection module;
the signal detection module is used for detecting whether the voltage and current signals exceed a threshold value or not, and outputting different voltage signals to the signal indication module according to whether the voltage and current signals exceed the threshold value or not;
the delay module is used for delaying the starting signal detection module after the circuit is electrified;
the signal indication module is used for self-checking whether a luminous fault exists when the circuit is powered on; receiving an input voltage signal of the signal detection module, and indicating the voltage and current signal conditions by light emission;
the power supply module is connected with the buck rectification filter module, the buck rectification filter module is connected with the voltage stabilizing module, the voltage stabilizing module is connected with the delay module, the signal detection module and the signal indication module, the signal sampling module is connected with the signal detection module, the delay module is connected with the signal detection module, and the signal detection module is connected with the signal indication module;
the signal indication module comprises a resistor R5, a resistor R6, a diode D3, a resistor R8 and a diode D2, wherein one end of the resistor R5 is connected with the voltage stabilizing module, the other end of the resistor R5 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with the anode of the diode D3, the cathode of the diode D3 is connected with one end of the resistor R8 and the signal detection module, the other end of the resistor R8 is connected with the anode of the diode D2, and the cathode of the diode D2 is grounded.
2. The voltage-current signal detection system according to claim 1, wherein the step-down rectifying and filtering module comprises a transformer W, a rectifier T, a capacitor C1, a capacitor C2, and an inductor L1, an input end of the transformer W is connected to the mains power module, an output end of the transformer W is connected to a first end of the rectifier T, an output end of the transformer W is connected to a third end of the rectifier T, a second end of the rectifier T is grounded, a fourth end of the rectifier T is connected to one end of the capacitor C1 and one end of the inductor L1, another end of the capacitor C1 is grounded, another end of the inductor L1 is connected to one end of the capacitor C2 and the voltage stabilizing module, and another end of the capacitor C2 is grounded.
3. The voltage-current signal detection system according to claim 1, wherein the voltage stabilizing module comprises a switch S1, a capacitor C3, a voltage stabilizer U1, a resistor R1, a voltage stabilizer RP1, and a capacitor C4, wherein an input end of the voltage stabilizer U1 is connected to one end of the capacitor C3 and one end of the switch S1, the other end of the switch S1 is connected to the buck rectifying and filtering module, the other end of the capacitor C3 is grounded, a ground end of the voltage stabilizer U1 is connected to one end of the resistor R1 and one end of the voltage stabilizer RP1, the other end of the voltage stabilizer RP1 is grounded, an output end of the voltage stabilizer U1 is connected to the other end of the resistor R1, one end of the capacitor C4, a delay module, a signal detection module, and a signal indication module, and the other end of the capacitor C4 is grounded.
4. The voltage-current signal detection system according to claim 1, wherein the delay module comprises a MOS tube V1, a resistor R4 and a capacitor C9, wherein a D pole of the MOS tube V1 is connected to one end of the resistor R4 and the voltage stabilizing module, an S pole of the MOS tube V1 is connected to the signal detection module, a G pole of the MOS tube V1 is connected to one end of the resistor R4 and one end of the capacitor C9, and the other end of the capacitor C9 is grounded.
5. The voltage-current signal detection system according to claim 1, wherein the signal sampling module comprises a capacitor C5, a resistor R2, a potentiometer RP2, and a capacitor C6, one end of the resistor R2 is connected to one end of the capacitor C5, the voltage or current signal VIN, the other end of the capacitor C5 is grounded, the other end of the resistor R2 provides the potentiometer RP2 to be grounded, the sliding end of the potentiometer RP2 is connected to one end of the capacitor C6, and the other end of the capacitor C6 is grounded.
6. The voltage-current signal detection system according to claim 4, wherein the signal detection module comprises a resistor R3, a capacitor C7, a capacitor C8, a timer U2 and a resistor R7, the timer U2 is 555 timer, one end of the resistor R3 is connected with a pin 4 of the timer U2, the voltage stabilizing module, the other end of the resistor R3 is connected with one end of the capacitor C7 and a pin 6 of the timer U2, the other end of the capacitor C7 is grounded, a pin 5 of the timer U2 is grounded through the capacitor C8, a pin 1 of the timer U2 is grounded, a pin 8 of the timer U2 is connected with the delay module, a pin 3 of the timer U2 is connected with one end of the resistor R7, and the other end of the resistor R7 is connected with the signal indication module.
7. The system of claim 1, wherein the diodes D2 and D3 are light emitting diodes.
CN202310431613.XA 2023-04-21 2023-04-21 Voltage current signal detecting system Pending CN116243046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310431613.XA CN116243046A (en) 2023-04-21 2023-04-21 Voltage current signal detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310431613.XA CN116243046A (en) 2023-04-21 2023-04-21 Voltage current signal detecting system

Publications (1)

Publication Number Publication Date
CN116243046A true CN116243046A (en) 2023-06-09

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