Time relay control circuit

Abstract

The utility model relates to a time relay control circuit, which comprises an anti-interference module, a normally-closed driving module, a normally-open driving module, a normally-closed access module, a normally-open access module, a switch driving module and a voltage-stabilized power supply module. By integrating the anti-interference module, external interference signals are effectively isolated and filtered, the stability of signals received by the timer chip is ensured, the reliability and stability of the whole control circuit are improved, the normally-closed access module and the normally-open access module are each provided with two independent processing circuits, multi-path signal input is supported, and the reliability and stability of the control circuit are improved. In addition, elements such as P-channel field effect transistors and N-channel field effect transistors are adopted, accurate control and processing of signals are achieved, the circuit response speed is increased, the normally-closed driving module and the normally-open driving module utilize elements such as optocouplers and metal film resistors to stably drive contact switches, the switch driving module further enhances the driving capacity, and the circuit reliability is improved. The voltage-stabilized power supply module provides stable working voltage to ensure normal operation of the circuit.

Description

TECHNICAL FIELD

[0001] The utility model relates to time relay technical field especially relates to a time relay control circuit. BACKGROUND

[0002] Time relay is a kind of electrical component widely used in the field of automation control, which can output control signal to drive the action of external circuit after receiving specific input signal and preset time delay. However, in practical application, time relay control circuit often faces various interference factors, such as electromagnetic interference, voltage fluctuation, etc. These factors may affect the accuracy and stability of time relay. Traditional time relay control circuit may lack perfect anti-interference measures, so it is easy to be affected by external interference signal when working in complex electromagnetic environment, thereby producing misoperation or failure. In addition, traditional circuit may have problems such as insufficient signal processing capacity or signal transmission delay when processing multiple input signals, which affects the response speed and reliability of control circuit. SUMMARY

[0003] Therefore, the utility model aims at providing a kind of time relay control circuit with high reliability, high flexibility and easy to maintain.

[0004] In order to realize the above purpose, the utility model adopts a kind of time relay control circuit, including anti-interference module, normally closed drive module, normally open drive module, normally closed access module, normally open access module, switch drive module, voltage stabilizing power module, the input end of anti-interference module receives external control input signal, and the signal after processing is output to the timer chip inside anti-interference module, for driving timer chip to work, normally closed drive module receives control signal from timer chip, and according to control signal, the switch action of normally closed contact is driven, for controlling the on-off of external circuit, switch drive module receives control signal from timer chip, and the signal is amplified and converted, normally open drive module receives amplified conversion signal in switch drive module, and according to amplified conversion signal, the switch action of normally open contact is driven, for controlling the on-off of external circuit, normally closed access module receives normally closed input signal from external circuit, monitors the state of normally closed input signal and feeds back state information to normally closed drive module, normally open access module receives normally open input signal from external circuit, monitors the state of normally open input signal, and feeds back state information to normally open drive module, voltage stabilizing power module is used to provide stable working voltage for the whole control circuit.

[0005] The utility model further sets up as anti -interference module includes photo -coupler, fast recovery rectifier diode, stabilizing voltage diode, metal film resistance, emitting diode, polypropylene film capacitor, capacitor, timer chip, the photo -coupler is used for isolating control signal, fast recovery rectifier diode and stabilizing voltage diode are used for providing voltage protection, metal film resistance and polypropylene film capacitor cooperate and work, are used for limiting current, dividing voltage, filtering to provide stable input signal to timer chip, capacitor is used for further filtering, emitting diode is as state indication, timer chip receives the input signal after anti -interference module processing, and generates timing control signal according to preset condition to drive subsequent circuit action.

[0006] The utility model further sets up as normally closed access module includes first road normally closed access circuit and second road normally closed access circuit, first road normally closed access circuit includes P channel field effect tube, stabilizing voltage diode, polypropylene film capacitor, metal film resistance, pressure sensitive resistance, fast recovery diode, first road normally closed access circuit is used for receiving and processing first road normally closed input signal.

[0007] The utility model further sets up as second road normally closed access circuit includes N channel field effect tube, stabilizing voltage diode, polypropylene film capacitor, metal film resistance, pressure sensitive resistance, fast recovery diode, second road normally closed access circuit is used for providing with first road normally closed access circuit additional normally closed input signal processing channel.

[0008] The utility model further sets up as normally open access module includes first road normally open access circuit and second circuit normally open access circuit of identical circuit constitution, first road normally open access circuit includes N channel field effect tube, stabilizing voltage diode, polypropylene film capacitor, metal film resistance, pressure sensitive resistance, fast recovery diode, normally open access module is used for receiving and processing normally open input signal.

[0009] The utility model further sets up as normally closed drive module includes first road normally closed drive circuit and second road normally closed drive circuit of identical circuit constitution, first road normally closed drive circuit includes photo -coupler, metal film resistance, polypropylene film capacitor, emitting diode, normally closed drive module is used for receiving the control signal of timer chip, and carries out switching action through control signal drive corresponding normally closed contact.

[0010] The utility model further sets up as switch drive module includes metal film resistance, NPN type bipolar transistor, switch drive module is used for receiving the control signal of timer chip, and according to control signal transmission normally open drive module.

[0011] The utility model further sets up as the normally open drive module includes the first way normally open drive circuit and the second way normally open drive circuit of the circuit composition, the first way normally open drive circuit includes photoelectric coupler, polypropylene film capacitor, metal film resistance, emitting diode, the normally open drive module is used for receiving the control signal of switch drive module, and carries out switch action through the control signal drive corresponding normally open contact.

[0012] The utility model further sets up as the voltage stabilizing module includes fast recovery diode, metal film resistance, voltage stabilizing diode, emitting diode, voltage stabilizing module receives AC power input, provides stable working voltage for whole control circuit through rectification and voltage stabilizing processing.

[0013] The utility model further sets up as the timer chip's model is NE555.

[0014] Compared with the prior art, the utility model has the advantages that through the integrated anti-interference module, external interference signals are effectively isolated and filtered, the timer chip receives stable signals, the reliability and stability of the overall control circuit are improved, the normally closed access module and the normally open access module are both designed with two independent processing circuits, support multiple signal inputs, enhance the flexibility and application range of the circuit, and use P-channel and N-channel field effect tubes and other elements to realize accurate control and processing of signals, speed up the circuit response speed, the normally closed drive module and the normally open drive module use photoelectric coupler, metal film resistance and other elements to stably drive the contact switch, the switch drive module further enhances the driving capacity, the voltage stabilizing module provides stable working voltage to ensure normal operation of the circuit, the emitting diode in the voltage stabilizing module directly indicates the power state, and monitoring and maintenance are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the circuit principle block diagram of the utility model embodiment.

[0016] Figure 2 It is the anti-interference module circuit principle diagram of the utility model embodiment.

[0017] Figure 3 It is the normally closed access module circuit principle diagram of the utility model embodiment.

[0018] Figure 4 It is the normally open access module circuit principle diagram of the utility model embodiment.

[0019] Figure 5 It is the normally closed drive module circuit principle diagram of the utility model embodiment.

[0020] Figure 6 It is the switch drive module circuit principle diagram of the utility model embodiment.

[0021] Figure 7The normal-open driving module circuit principle diagram is an embodiment of the utility model.

[0022] Figure 8 The voltage stabilizing power module circuit principle diagram is an embodiment of the utility model. DETAILED DESCRIPTION

[0023] As Figures 1-8 shown, the embodiment of the utility model provides a time relay control circuit, including anti -interference module, normally closed drive module, normally open drive module, normally closed access module, normally open access module, switch drive module, voltage stabilizing power module, the input end of anti -interference module receives the control input signal of outside, and the signal after processing is output to the timer chip in the inside of anti -interference module, to drive timer chip work, normally closed drive module receives the control signal from timer chip, and according to control signal drive normally closed contactor's switch action, to control the on-off of external circuit, switch drive module receives the control signal from timer chip, and the signal is amplified and converted, normally open drive module receives the amplified conversion signal in switch drive module, and according to amplified conversion signal drive normally open contactor's switch action, to control the on-off of external circuit, normally closed access module receives the normally closed input signal from external circuit, monitors normally closed input signal's state and gives normally closed drive module with state information feedback, normally open access module receives the normally open input signal from external circuit, monitors normally open input signal's state, and gives normally open drive module with state information feedback, voltage stabilizing power module provides stable working voltage for entire control circuit.

[0024] As Figure 2As shown, the anti-interference module includes an optocoupler U2, a fast recovery rectifier diode D2, a Zener diode WD1, metal film resistors R6-R7, metal film resistors R9-R11, an LED2, a polypropylene film capacitor C1, a polypropylene film capacitor C3, a capacitor C4, and a timer chip U1 (model NE555). The positive terminal of the optocoupler U2 is connected to the positive terminal of the Zener diode WD1. The negative terminal of the Zener diode WD1 is connected to the negative terminal of the fast recovery rectifier diode D2 and one end of the metal film resistor R6. The positive terminal of the fast recovery rectifier diode D2 is connected to the control signal input terminal. The other end of the metal film resistor R6 is connected to the positive terminal of the LED2. The negative terminal of the optocoupler U2 is connected to one end of the metal film resistor R7. The other end of the metal film resistor R7 and the negative terminal of the LED2 are both grounded. The light-receiving end of the optocoupler U2... The collector of the optocoupler is connected to a +12V power supply. The emitter of the light-receiving end of the optocoupler U2 is connected to one end of the metal film resistor R9 and one end of the metal film resistor R11. The other end of the metal film resistor R9 is connected to one end of the metal film resistor R10. The other end of the metal film resistor R10 is grounded. The second pin of the timer chip U1 is connected to the other end of the metal film resistor R11, the positive terminal of the polypropylene film capacitor C1, and one end of the polypropylene film capacitor C3. The negative terminal of the polypropylene film capacitor C1 and the other end of the polypropylene film capacitor C3 are both grounded. The fifth pin of the timer chip U1 is connected to one end of the capacitor C4. The other end of the capacitor C4 is grounded. The eighth and fourth pins of the timer chip U1 are both connected to a +12V power supply. The anti-interference module does not respond to signals below 45V. The resistance values ​​of the metal film resistors R9 and R10 are selected according to the delay requirements.

[0025] like Figure 3 As shown, the normally closed input module includes a first normally closed input circuit and a second normally closed input circuit. The first normally closed input circuit includes a P-channel MOSFET T1, a Zener diode WD3, a polypropylene film capacitor C9, a metal film resistor R28, a metal film resistor R36, a varistor RV1, and a fast recovery diode D7. The gate of the P-channel MOSFET T1 is connected to the first normally closed input point and the positive terminal of the Zener diode WD3. The drain of the P-channel MOSFET T1, the negative terminal of the Zener diode WD3, one end of the polypropylene film capacitor C9, one end of the metal film resistor R36, and one end of the varistor RV1 are all connected to the first normally closed positive power supply input terminal. The source of the P-channel MOSFET T1 is connected to the other end of the varistor RV1, one end of the fast recovery diode D7, and the first normally closed negative power supply input terminal. The other end of the fast recovery diode D7 is grounded. The other end of the polypropylene film capacitor C9 is connected to one end of the metal film resistor R28. The other ends of the metal film resistors R28 and R36 are both grounded.

[0026] The second normally closed access circuit includes an N-channel MOSFET T2, a Zener diode WD4, a polypropylene film capacitor C10, a metal film resistor R29, a metal film resistor R37, a varistor RV2, a fast recovery diode D8, and a fast recovery diode D4. The gate of the N-channel MOSFET T2 is connected to the second normally closed access point, the positive terminal of the Zener diode WD4, the drain of the N-channel MOSFET T2, the negative terminal of the Zener diode WD4, one end of the polypropylene film capacitor C10, one end of the metal film resistor R37, and the voltage regulator RV2. One end of the varistor RV2 is connected to the second normally closed positive power supply input terminal. The source of the N-channel MOSFET T2 is connected to one end of the fast recovery diode D4. The other end of the fast recovery diode D4 is connected to the other end of the varistor RV2, one end of the fast recovery diode D8, and the second normally closed negative power supply input terminal, respectively. The other end of the fast recovery diode D8 is grounded. The other end of the polypropylene film capacitor C10 is connected to one end of the metal film resistor R29. The other ends of the metal film resistor R29 and the other ends of the metal film resistor R37 are both grounded.

[0027] like Figure 4 As shown, the normally open access module includes a first normally open access circuit and a second normally open access circuit with identical circuit configurations. Taking the first normally open access circuit as an example, the first normally open access circuit includes an N-channel MOSFET T3, a Zener diode WD5, a polypropylene film capacitor C11, a metal film resistor R30, a metal film resistor R38, a varistor RV3, a fast recovery diode D9, and a fast recovery diode D5. The gate of the N-channel MOSFET T3 is connected to the first normally open access point and the positive terminal of the Zener diode WD5, respectively. The drain of the N-channel MOSFET T3 and the negative terminal of the Zener diode WD5 are also connected. One end of the polypropylene film capacitor C11, one end of the metal film resistor R38, and one end of the varistor RV3 are all connected to the first normally open positive power supply input terminal. The source of the N-channel field-effect transistor T3 is connected to one end of the fast recovery diode D5. The other end of the fast recovery diode D5 is connected to the other end of the varistor RV3, one end of the fast recovery diode D9, and the first normally open negative power supply input terminal, respectively. The other end of the fast recovery diode D9 is grounded. The other end of the polypropylene film capacitor C11 is connected to one end of the metal film resistor R30. The other ends of the metal film resistor R30 and the other ends of the metal film resistor R38 are both grounded.

[0028] like Figure 5As shown, the normally closed drive module includes a first normally closed drive circuit and a second normally closed drive circuit with identical circuit configurations. Taking the first normally closed drive circuit as an example, the first normally closed drive circuit includes an optocoupler U3, metal film resistors R12-R14, a polypropylene film capacitor C8, a metal film resistor R24, and a light-emitting diode LED3. The positive terminal of the light-emitting end of the optocoupler U3 is connected to the third pin U1-3 of the timer chip U1 and one end of the polypropylene film capacitor C8. The negative terminal of the light-emitting end of the optocoupler U3 is connected to one end of the metal film resistor R14. The other end of 14 and the other end of polypropylene film capacitor C8 are both grounded. The collector of the light-receiving end of optocoupler U3 is connected to one end of metal film resistor R13. The other end of metal film resistor R13 is connected to one end of metal film resistor R12 and one end of metal film resistor R24. The other end of metal film resistor R12 is connected to the gate of P-channel field-effect transistor T1 in the normally closed access module. The other end of metal film resistor R24 ​​is connected to the first normally closed access point. The emitter of the light-receiving end of optocoupler U3 is connected to the positive terminal of light-emitting diode LED3. The negative terminal of light-emitting diode LED3 is grounded.

[0029] like Figure 6 As shown, the switch drive module includes metal film resistors R18-R19 and an NPN bipolar transistor T5. The base of the NPN bipolar transistor T5 is connected to one end of the metal film resistor R19, and the other end of the metal film resistor R19 is connected to the third pin U1-3 of the timer chip U1. The collector of the NPN bipolar transistor T5 is connected to one end of the metal film resistor R18, and the other end of the metal film resistor R18 is connected to the DC power supply voltage +110V. The emitter of the NPN bipolar transistor T5 is grounded.

[0030] like Figure 7 As shown, the normally open drive module includes a first normally open drive circuit and a second normally open drive circuit with identical circuit configurations. Taking the first normally open drive circuit as an example, the first normally open drive circuit includes an optocoupler U5, a polypropylene film capacitor C6, metal film resistors R20-R21, metal film resistor R26, and a light-emitting diode LED5. The positive terminal of the light-emitting end of the optocoupler U5 is connected to the collector of the NPN bipolar transistor T5 in the switch drive module, one end of the polypropylene film capacitor C6, and the other end of the polypropylene film capacitor C6. The negative terminals of the light-emitting terminals of optocoupler U5 are all grounded. The collector of the light-receiving terminal of optocoupler U5 is connected to one end of metal film resistor R21. The other end of metal film resistor R21 is connected to one end of metal film resistor R20 and one end of metal film resistor R26 respectively. The other end of metal film resistor R20 is connected to the gate of N-channel field-effect transistor T3 in the normally open access module. The other end of metal film resistor R26 is connected to the first normally open access point. The emitter of the light-receiving terminal of optocoupler U5 is connected to the positive terminal of light-emitting diode LED5. The negative terminal of light-emitting diode LED5 is grounded.

[0031] likeFigure 8 As shown, the voltage stabilizing power module comprises a fast recovery rectifier diode D1, metal film resistors R1-R3, a voltage stabilizing diode WD2, and a light emitting diode LED1. The positive pole of the fast recovery rectifier diode D1 is connected to an AC power input end, the negative pole of the fast recovery rectifier diode D1 is connected to a rectified output node, the rectified output node is connected to one end of the metal film resistor R1, one end of the metal film resistor R2, and one end of the metal film resistor R3, respectively, the other end of the metal film resistor R1 is connected to the positive pole of the light emitting diode LED1, the other end of the metal film resistor R2 is connected to the negative pole of the voltage stabilizing diode WD2, a 12V reference voltage is connected to the other end of the metal film resistor R3 and the negative pole of the voltage stabilizing diode WD2, the positive pole of the voltage stabilizing diode WD2 and the negative pole of the light emitting diode LED1 are both grounded, and the rectified output node is +110V.

[0032] Of course, in addition to the above embodiments, the utility model can have other various embodiments, without departing from the content of the utility model technical scheme, those skilled in the art can make various corresponding changes and deformation according to the utility model, and these changes or deformation and the technical scheme in the patent are equivalent, then these corresponding changes and deformation should belong to the protection scope of the claims attached to the utility model, and the utility model creation conforms to the actual research and development ability and resource conditions of the applicant.

Claims

1. A time relay control circuit, characterized by: The anti-interference module, the normally closed drive module, the normally open drive module, the normally closed access module, the normally open access module, the switch drive module, and the voltage stabilizing power supply module are connected in series.

2. The time relay control circuit according to claim 1, characterized in that: The anti-interference module comprises an optical coupler, a fast recovery rectifier diode, a voltage stabilizing diode, a metal film resistor, a light emitting diode, a polypropylene film capacitor, a capacitor, and a timer chip.

3. The time relay control circuit according to claim 1 or 2, characterized in that: The first normally closed access circuit comprises a P-channel field effect transistor, a voltage stabilizing diode, a polypropylene film capacitor, a metal film resistor, a piezoresistor, and a fast recovery diode.

4. The time relay control circuit according to claim 3, characterized in that: The second normally closed access circuit comprises an N-channel field effect transistor, a voltage stabilizing diode, a polypropylene film capacitor, a metal film resistor, a piezoresistor, and a fast recovery diode.

5. The time relay control circuit according to claim 3, characterized in that: The first normally open access circuit comprises an N-channel field effect transistor, a voltage stabilizing diode, a polypropylene film capacitor, a metal film resistor, a piezoresistor, and a fast recovery diode. The second normally open access circuit comprises an N-channel field effect transistor, a voltage stabilizing diode, a polypropylene film capacitor, a metal film resistor, a piezoresistor, and a fast recovery diode.

6. The time relay control circuit according to claim 3, characterized in that: The constant-closed drive module includes first and second constant-closed drive circuits with consistent circuit configurations, the first constant-closed drive circuit includes an optocoupler, a metal film resistor, a polypropylene film capacitor and a light emitting diode, the constant-closed drive module is used for receiving a control signal of the timer chip and driving corresponding constant-closed contacts to perform switching actions through the control signal.

7. The time relay control circuit according to claim 5, characterized in that: The switch drive module includes a metal film resistor and an NPN bipolar transistor, the switch drive module is used for receiving a control signal of the timer chip and transmitting the control signal to the constant-open drive module.

8. The time relay control circuit according to claim 7, characterized in that: The constant-open drive module includes first and second constant-open drive circuits with consistent circuit configurations, the first constant-open drive circuit includes an optocoupler, a polypropylene film capacitor, a metal film resistor and a light emitting diode, the constant-open drive module is used for receiving a control signal of the switch drive module and driving corresponding constant-open contacts to perform switching actions through the control signal.

9. The time relay control circuit of claim 1, wherein: The voltage stabilizing power module includes a fast recovery rectifier diode, a metal film resistor, a voltage stabilizing diode and a light emitting diode, the voltage stabilizing power module receives an alternating current power input, rectifies and stabilizes the alternating current power input to provide a stable working voltage for the entire control circuit.

10. The time relay control circuit of claim 1, wherein: The timer chip is NE555.

Images