CN208939555U - A kind of Self-recover overvoltage-undervoltage protector - Google Patents

Abstract

The utility model relates to a kind of Self-recover overvoltage-undervoltage protectors, including processing chip, relay drive circuit, voltage collection circuit and current collection circuit, the processing chip to connect respectively with relay drive circuit, voltage collection circuit and current collection circuit.It is more accurate to the detection of circuit electrical parameter by using the double check of voltage signal and current signal, equipment is improved to the accuracy of overload judgement；Using liquid crystal display circuit, the voltage and current signal that real-time display detects digitized of going forward side by side is shown, can satisfy the demand of user's close-ups；Meanwhile increasing remote communicating function, and the remote collection of equipment detection information may be implemented, it is long-range to monitor, it is more intelligent.

Description

A kind of Self-recover overvoltage-undervoltage protector

Technical field

The utility model relates to Electrical Safety field more particularly to a kind of Self-recover overvoltage-undervoltage protectors.

Background technique

Existing product in many operating voltages for obtaining overvoltage/undervoltage using capacitance-resistance voltage reduction circuit, although this scheme at This is low, small in size, but circuit disadvantage is obvious, can not accomplish electrical isolation first, secondly because capacitor is filled for a long time Its performance constantly changes during discharge of electricity, and capacity becomes smaller, and will lead to circuital current and becomes smaller, and then will appear circuit not The phenomenon that work, protector damages；Second is exactly the existing overvoltage-undervoltage protector overwhelming majority in the process for carrying out overcurrent protection In rely primarily on the characteristic of relay itself disjunction carried out to the circuit after overload, this single protection not fully may be used Lean on, still can be there is a phenomenon where overcurrent in practical application and relay damaged does not depart from；To solve the above problems, we are to production Product have carried out following design and improvement.

Utility model content

To solve above-mentioned background technique, the utility model is intended to provide a kind of Self-recover overvoltage-undervoltage guarantor Device is protected,

To solve the above problems, the technical solution of the utility model is as follows:

A kind of Self-recover overvoltage-undervoltage protector, including processing chip, relay drive circuit, voltage collection circuit and electric current Acquisition Circuit, the processing chip is connect with relay drive circuit, voltage collection circuit and current collection circuit respectively, described Relay drive circuit includes the first triode, the second triode, third transistor, the 4th triode, the 5th triode, the 6th The base stage of triode, first resistor, second resistance and relay, first triode connects third transistor through first resistor Collector, the emitter of the first triode connects the emitter of the second triode, and the collector of the first triode is separately connected The collector of 5th triode and 1 end of relay, the collector of the second triode are separately connected the collector of the 6th triode With 2 ends of relay, the emitter of third transistor connects the base stage of the 6th triode, the base stage connection the 4th of the 5th triode The emitter of triode, the emitter of the 5th triode and the emitter ground connection of the 6th triode, the base stage warp of the second triode The base stage of the collector of second resistance the 4th triode of connection, the base stage of third transistor and the 4th triode is separately connected processing Chip, wherein the first triode and the second triode are PNP type triode, third transistor, the 4th triode, the five or three pole Pipe and the 6th triode are NPN type triode.

It further include liquid crystal display circuit in above scheme, the liquid crystal display circuit connection processing chip, for aobvious in real time Show the voltage and current signal of voltage detector and current detector detection.

It further include communicating circuit in above scheme, the communicating circuit connection processing chip, the model of the communicating circuit For ISO3082DWR.

In above scheme, the voltage collection circuit includes first diode, the second diode, first capacitor, the second electricity Hold, third capacitor, 3rd resistor and the 4th resistance, the first capacitor, the second capacitor, third capacitor, the 4th resistance and second Diodes in parallel, first capacitor, the anode of the second capacitor and third capacitor, one end of the 4th resistance and the second diode cathode Be separately connected one end of 3rd resistor, the cathode pole of first capacitor, the second capacitor and third capacitor, the other end of the 4th resistance and The plus earth of second diode, the cathode of the other end connection first diode of the 3rd resistor, first diode is just Pole connection processing chip I/O port.

In above scheme, the model STC89C51 of the processing chip.

The utility model has the beneficial effects that

1, more accurate to the detection of circuit electrical parameter using the double check of voltage signal and current signal, it improves Accuracy of the equipment to overload judgement；

2, using liquid crystal display circuit, the voltage and current signal that real-time display detects digitized of going forward side by side is shown, can be with Meets the needs of user's close-ups；

3, increase remote communicating function, the remote collection of equipment detection information may be implemented, it is long-range to monitor, more intelligently Change.

Detailed description of the invention

Fig. 1 is the structural block diagram of the Self-recover overvoltage-undervoltage protector of an embodiment of the present invention；

Fig. 2 is voltage collection circuit figure in the utility model；

Fig. 3 is relay drive circuit figure in the utility model；

Primary symbols illustrate in figure: the Q1~Q6: the first~the 6th triode；R1~R4: the first~the 4th resistance；C1~ C3: the first~third capacitor, the D1~D2: the first~the second diode.

Specific embodiment

The technical solution of the utility model is described in further detail with reference to the accompanying drawings and examples.

A kind of Self-recover overvoltage-undervoltage protector, as shown in Figure 1, including processing chip, relay drive circuit, voltage acquisition Circuit, current collection circuit and power circuit, processing chip are adopted with relay drive circuit, voltage collection circuit, electric current respectively Collector is connected with power circuit, and power circuit provides power supply for Self-recover overvoltage-undervoltage protector, and relay drive circuit can be with Realize the control to relay.

As shown in figure 3, relay drive circuit includes the first triode, the second triode, third transistor, the four or three pole Pipe, the 5th triode, the 6th triode, first resistor, second resistance and relay, the base stage of first triode is through first Resistance connects the collector of third transistor, and the emitter of the first triode connects the emitter of the second triode, the one or three pole The collector of pipe is separately connected the collector of the 5th triode and 1 end of relay, and the collector of the second triode is separately connected The collector of 6th triode and 2 ends of relay, the base stage of emitter the 6th triode of connection of third transistor, the five or three The base stage of pole pipe connects the emitter of the 4th triode, the emitter of the 5th triode and the emitter ground connection of the 6th triode, The base stage of second triode connects the collector of the 4th triode, the base stage of third transistor and the 4th triode through second resistance Base stage be separately connected processing chip I/O mouth pin, for indirectly controlling the working condition of relay.Wherein, the one or three pole Pipe and the second triode are PNP type triode, and third transistor, the 4th triode, the 5th triode and the 6th triode are NPN Type triode.

It in one embodiment, further include liquid crystal display circuit, liquid crystal display circuit connection processing chip, real-time display voltage The voltage and current signal of detector and current detector detection, meets voltage, the current signal that user's close-ups detect Value.

It in one embodiment, further include communicating circuit, communicating circuit connection processing chip increases remote communicating function, real The remote collection of existing equipment detection information, long-range to monitor, the model for the communicating circuit chip that the utility model uses ISO3082DWR。

Wherein, as shown in Fig. 2, voltage collection circuit includes first diode, the second diode, first capacitor, the second electricity Hold, third capacitor, 3rd resistor and the 4th resistance, the first capacitor, the second capacitor, third capacitor, the 4th resistance and second Diodes in parallel, first capacitor, the anode of the second capacitor and third capacitor, one end of the 4th resistance and the second diode cathode Be separately connected one end of 3rd resistor, the cathode pole of first capacitor, the second capacitor and third capacitor, the other end of the 4th resistance and The plus earth of second diode, the cathode of the other end connection first diode of the 3rd resistor, first diode is just Pole connection processing chip.Voltage collector gets the voltage on the lesser circuit of voltage by using two electric resistance partial pressures, acquisition Value, to calculate the voltage value of collection point, i.e., carries out voltage measurement by the way of electric resistance partial pressure.

The utility model is realized by the detection to sampled point to electric in circuit by the way that sampled point is arranged in detection circuit Pressure is measured in real time with current signal, the threshold value of relevant voltage current signal is set in processing chip, when the electricity detected Judge that current and voltage signals for normal condition, are sentenced when the value of detection is not in threshold range when piezoelectricity flow valuve is in threshold range Disconnected current and voltage signals are abnormality, and the voltage and current for normal condition is as a result, be series at line by handling chip controls Relay closure in road, guarantees that entire route is in normal operation, system normal power supply；When occurring abnormal voltage in route When current signal, processing chip controls relay is disconnected, and ensures that abnormal voltage and current signal is cut off in this way, to guarantee Route will not be run under abnormal conditions again.The utility model is different from the alarm mode of traditional Self-recover overvoltage-undervoltage protector, adopts With the collected voltage and current value of liquid crystal display circuit real-time display, user is facilitated closely to detect voltage and current signal in real time Size carries out the judgement of external on-off with standby user under special circumstances.Meanwhile to meet the long-range monitoring voltage electric current letter of user Number demand can carry out long-range data transmission by adding communicating circuit, realize long-range monitoring.

Elaborate many details in the above description in order to fully understand the utility model.But above description It is only the preferred embodiment of the utility model, the utility model can be come with being much different from other way described herein Implement, therefore the utility model is not limited by specific implementation disclosed above.Any those skilled in the art exist simultaneously It does not depart under technical solutions of the utility model ambit, it is all practical new to this using the methods and technical content of the disclosure above Type technical solution makes many possible changes and modifications or equivalent example modified to equivalent change.It is all without departing from this The content of utility model technical solution any is simply repaired according to the technical essence of the utility model is made to the above embodiment Change, equivalent variations and modification, in the range of still falling within technical solutions of the utility model protection.

Claims (5)

1. a kind of Self-recover overvoltage-undervoltage protector, it is characterised in that: including handling chip, relay drive circuit, voltage acquisition Circuit, current collection circuit and power circuit, the processing chip respectively with relay drive circuit, voltage collection circuit, electricity Stream Acquisition Circuit is connected with power circuit, and the relay drive circuit includes the first triode, the second triode, the three or three pole Pipe, the 4th triode, the 5th triode, the 6th triode, first resistor, second resistance and relay, first triode Collector of the base stage through first resistor connection third transistor, the emitter of the first triode connects the transmitting of the second triode Pole, the collector of the first triode are separately connected the collector of the 5th triode and 1 end of relay, the current collection of the second triode Pole is separately connected the collector of the 6th triode and 2 ends of relay, and the emitter of third transistor connects the 6th triode Base stage, the base stage of the 5th triode connect the emitter of the 4th triode, the emitter of the 5th triode and the 6th triode Emitter ground connection, the base stage of the second triode connect the collector of the 4th triode, the base stage of third transistor through second resistance The base stage of connection and the 4th triode is separately connected the I/O pin of processing chip, wherein the first triode and the second triode are PNP type triode, third transistor, the 4th triode, the 5th triode and the 6th triode are NPN type triode.

2. Self-recover overvoltage-undervoltage protector according to claim 1, it is characterised in that: it further include liquid crystal display circuit, institute State liquid crystal display circuit connection processing chip, the voltage and current letter detected for real-time display voltage detector and current detector Number.

3. Self-recover overvoltage-undervoltage protector according to claim 1, it is characterised in that: it further include communicating circuit, it is described logical It interrogates circuit connection and handles chip, the model ISO3082DWR of the communicating circuit.

4. Self-recover overvoltage-undervoltage protector according to claim 1, it is characterised in that: the voltage collection circuit includes the One diode, the second diode, first capacitor, the second capacitor, third capacitor, 3rd resistor and the 4th resistance, first electricity Appearance, the second capacitor, third capacitor, the 4th resistance and the second diodes in parallel, first capacitor, the second capacitor and third capacitor are just The cathode of pole, one end of the 4th resistance and the second diode is separately connected one end of 3rd resistor, first capacitor, the second capacitor and The other end of the plus earth of the cathode of third capacitor, the other end of the 4th resistance and the second diode, the 3rd resistor connects Connect the cathode of first diode, anode connection processing chip I/O port of first diode.

5. Self-recover overvoltage-undervoltage protector according to claim 1, it is characterised in that: the model of the processing chip STC89C51。