CN201928004U

CN201928004U - Singlechip-microcomputer-based xeliminator transformer protection circuit

Info

Publication number: CN201928004U
Application number: CN201120012724XU
Authority: CN
Inventors: 张平刚; 蒋欣
Original assignee: Nantong Sanxin Plastics Equipment Technology Co Ltd
Priority date: 2011-01-17
Filing date: 2011-01-17
Publication date: 2011-08-10
Anticipated expiration: 2021-01-17

Abstract

The utility model relates to a singlechip-microcomputer-based xeliminator transformer protection circuit. The singlechip-microcomputer-based xeliminator transformer protection circuit is characterized in that a protection circuit (5) comprises a power supply (6), a signal acquisition circuit (1), a singlechip-microcomputer-based master control circuit (2), a control circuit (3) and a watchdog circuit (4), wherein the signal acquisition circuit (1) and the control circuit (3) are connected with one side of the singlechip-microcomputer-based master control circuit (2); and the other side of the singlechip-microcomputer-based master control circuit (2) is connected with the watchdog circuit (4). The singlechip-microcomputer-based xeliminator transformer protection circuit has the advantages that with the adoption of the singlechip-microcomputer-based master control circuit (2), the singlechip-microcomputer-based xeliminator transformer protection circuit plays a more intelligent role of protecting a transformer, and the watchdog circuit (4) can prevent abnormal situations of dead halt and program fleet of the singlechip microcomputer and reset the singlechip microcomputer in time, so that the singlechip microcomputer is always in a normal working order.

Description

SCM Based Xelminator tranformer protection circuit

Technical field

The utility model relates to a kind of tranformer protection circuit, relates in particular to SCM Based Xelminator tranformer protection circuit.

Background technology

On various takeup type machines such as weaving, plastics, printing and dyeing,, thereby all can cause damage to machinery, electronics and the person owing to the friction of material and cylinder produces a large amount of static.Adopt Xelminator, can produce a large amount of positive and negative charge air mass, static that can the corrective surface, thus avoid influencing the quality of product, the phenomenon such as fiery of avoiding human body to be shocked by electricity or causing because of discharge.Xelminator uses for a long time, when faults such as generation short circuit, electric leakage, owing to can not interrupt the input of transformer timely, cause transformer accelerated ageing or damage, can't effectively eliminate the static of product, progress has influenced the quality of product and has reduced production efficiency of products.Usually the Xelminator transformer circuit does not adopt singlechip technology, along with the exploitation and the further investigation of singlechip technology, adopts singlechip technology to have the accuracy height, and integrated modular degree height such as can control flexibly at advantage.Therefore, need provide a kind of new technical scheme to solve above-mentioned technical problem.

The utility model content

The purpose of this utility model provides a kind of accuracy height, highly sensitive SCM Based Xelminator tranformer protection circuit.

The technical solution adopted in the utility model:

SCM Based Xelminator tranformer protection circuit; protective circuit comprises power supply, signal acquisition circuit, based on single-chip microcomputer governor circuit, control circuit and watchdog circuit; described signal acquisition circuit and control circuit be connected based on single-chip microcomputer governor circuit one side, describedly be connected with watchdog circuit based on single-chip microcomputer governor circuit opposite side.

Described signal acquisition circuit is by triode Q3; triode Q4 and resistance are formed; peripheral circuit is handled to the protective circuit sampling and to sampled signal and is changed d. c. voltage signal into; the end of described d. c. voltage signal input resistance R8; the other end of described resistance R 8 is connected with the emitter of triode Q3; the base stage of described triode Q3 is connected with 2 pin of potentiometer RW1; 1 pin of described potentiometer RW1 is connected with supply power voltage VCC; the 3 pin ground connection of described potentiometer RW1; the collector electrode of triode Q3 is connected with an end of resistance R 10 and resistance R 9; the other end ground connection of described resistance R 9; the other end of described resistance R 10 is connected with the base stage of triode Q4; the collector electrode of described triode Q4 is connected with the end of pull-up resistor R11 and the IO port P1.5 of chip U1 respectively; the grounded emitter of described triode Q4; the other end of described pull-up resistor R11 is connected with the IO port P1.7 of chip U1 by capacitor C 4, and the other end of described pull-up resistor R11 also is connected with the port VCC of supply power voltage VCC and chip U1.

Described watchdog circuit is made up of chip U2 and oscillating circuit, described oscillating circuit is by capacitor C 8, resistance R 13 and resistance R 12 are formed, 9 of described chip U2,10,11 pin respectively with capacitor C 8, resistance R 13, resistance R 12 connects, 12 pin of described chip U2 are connected with capacitor C 4 with the IO port P1.7 of chip U1 respectively, 3 pin of described chip U2 are connected to the base stage of triode Q2 by current-limiting resistance R2, the collector electrode of described triode Q2 is connected to an end of resistance R 5 and capacitor C 3, the other end ground connection of described resistance R 5, the other end connecting resistance R7 of described capacitor C 3 and the end of diode D9, described resistance R 7 other end ground connection, the other end of described diode D9 is received 1 pin of chip U1.

Describedly comprise chip U1 and oscillating circuit based on the single-chip microcomputer governor circuit, described oscillating circuit comprises crystal oscillator Y1, capacitor C 1 and capacitor C 2, described crystal oscillator Y1 two ends connect capacitor C 1 and capacitor C 2, described capacitor C 1 and capacitor C 2 series connection, 4,5 bipods of described chip U1 connect the two ends of crystal oscillator Y1, the 10 pin ground connection of described chip U1.

Described control circuit is connected with the IO port P1.3 of chip U1.

Described triode Q3 is PNP triode Q3.

Described triode Q4 is NPN triode Q4.

Described power supply is supply power voltage VCC.

Advantage of the present utility model: adopt the effect that has the protection transformer based on the single-chip microcomputer governor circuit, the watchdog circuit circuit can prevent the abnormal conditions of single chip microcomputer halt and program fleet, is in time resetted, and makes single-chip microcomputer be in normal operation all the time.

Description of drawings

Fig. 1 is a structured flowchart of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

Wherein, 1, signal acquisition circuit, 2, based on the single-chip microcomputer governor circuit, 3, control circuit, 4, watchdog circuit, 5, protective circuit, 6, power supply.

Embodiment

As illustrated in fig. 1 and 2; SCM Based Xelminator tranformer protection circuit of the present utility model; protective circuit 5 comprises power supply 6, signal acquisition circuit 1, based on single-chip microcomputer governor circuit 2, control circuit 3 and watchdog circuit 4; signal acquisition circuit 1 and control circuit 3 be connected based on single-chip microcomputer governor circuit 2 one sides; be connected with watchdog circuit 4 based on single-chip microcomputer governor circuit 2 opposite sides, power supply 6 is supply power voltage VCC.

Signal acquisition circuit 1 is by PNP triode Q3; NPN triode Q4 and resistance are formed; PNP triode Q3 is as voltage comparator; NPN triode Q4 forms not circuit; peripheral circuit is handled to the protective circuit sampling and to sampled signal and is changed d. c. voltage signal into; the end of d. c. voltage signal input resistance R8; the other end of resistance R 8 is connected with the emitter of PNP triode Q3; the base stage of PNP triode Q3 is connected with 2 pin of potentiometer RW1; 1 pin of potentiometer RW1 is connected with supply power voltage VCC; the 3 pin ground connection of potentiometer RW1; can adjust the reference voltage value that is added in PNP triode Q3 base stage by adjusting potentiometer RW1; the collector electrode of PNP triode Q3 is connected with an end of resistance R 10 and resistance R 9; the other end ground connection of resistance R 9; this moment, resistance R 9 was as the load resistance of PNP triode Q3 and the biasing resistor of NPN triode Q4; the other end of resistance R 10 is connected with the base stage of NPN triode Q4; the collector electrode of triode Q4 is connected with the end of pull-up resistor R11 and the IO port P1.5 of chip U1 respectively; the grounded emitter of NPN triode Q4; the other end of pull-up resistor R11 is connected with the IO port P1.7 of chip U1 by capacitor C 4, and the other end of pull-up resistor R11 also is connected with the port VCC of supply power voltage VCC and chip U1.When sampled voltage during greater than reference voltage 0.7V; PNP triode Q3 conducting; voltage adds to by resistance R 10 on the base stage of NPN triode Q4, NPN triode Q4 conducting, and this moment, the P1.5 port of chip U1 was a low level; otherwise PNP triode Q3 ends; the voltage that adds to resistance R 10 is low, and triode Q4 ends, and this moment, the P1.5 port of chip U1 was a high level; give single-chip microcomputer with high or low level signal, judge whether to reach protective condition by single-chip microcomputer.

Watchdog circuit 4 is made up of chip U2 and oscillating circuit, described oscillating circuit is by capacitor C 8, resistance R 13 and resistance R 12 are formed, 9 of chip U2,10,11 pin respectively with capacitor C 8, resistance R 13, resistance R 12 connects, 12 pin of chip U2 are connected with capacitor C 4 with the IO port P1.7 of chip U1 respectively, 3 pin of chip U2 are connected to the base stage of triode Q2 by current-limiting resistance R2, the collector electrode of triode Q2 is connected to an end of resistance R 5 and capacitor C 3, the other end ground connection of resistance R 5, the other end connecting resistance R7 of capacitor C 3 and the end of diode D9, resistance R 7 other end ground connection, the other end of diode D9 is received 1 pin of chip U1.Chip U1 power-on reset signal is the high level in continuous two cycles, when protective circuit powers on, capacitor C 3 can be passed through the power-on reset signal of diode D9 to the high level of 1 pin generation of chip U1 by momentary charge, and this moment, 3 pin of chip U2 were low level, triode Q2 conducting; In the protective circuit normal work period, chip U1 can reset to chip U2 in certain period of time by P1.7, makes the port Q14 of chip U2 be in low level state all the time; When the state of chip U1 deadlock or program fleet takes place when, program stops chip U2 is resetted, 3 pin of chip U2 can be exported high level adds to triode Q2 by resistance R 2 base stage over time, triode Q2 ends, capacitor C 3 begins charging, have 1 pin that one section high level signal is given chip U1 this moment, and single-chip microcomputer is resetted.

Comprise chip U1 and oscillating circuit based on single-chip microcomputer governor circuit 2, oscillating circuit comprises crystal oscillator Y1, capacitor C 1 and capacitor C 2, and crystal oscillator Y1 two ends connect capacitor C 1 and capacitor C 2, capacitor C 1 and capacitor C 2 series connection, 4,5 bipods of chip U1 connect the two ends of crystal oscillator Y1, the 10 pin ground connection of chip U1.The port P1.7 of chip U1 is a low level when power-up initializing, can individual reset signal be arranged to chip U2; 17 pin of U1 are collector electrodes that port P1.5 connects NPN triode Q4; pass through the term of execution of program sampled signal analysis in a period of time and the combination of Xelminator transformer self character; whether decision takes safeguard measure; the IO port P1.3 of chip U1 is connected with control circuit 3; circuit quit work when port P1.3 was low level; circuit operate as normal during for high level; circuit is output high level or low level by the data analysis of the port P1.5 of chip U1 is decided port P1.3, reaches the effect of control circuit switch.

Claims

1. SCM Based Xelminator tranformer protection circuit; it is characterized in that: protective circuit (5) comprises power supply (6), signal acquisition circuit (1), based on single-chip microcomputer governor circuit (2), control circuit (3) and watchdog circuit (4); described signal acquisition circuit (1) and control circuit (3) be connected based on single-chip microcomputer governor circuit (2) one sides, describedly be connected with watchdog circuit (4) based on single-chip microcomputer governor circuit (2) opposite side.

2. SCM Based Xelminator tranformer protection circuit according to claim 1; it is characterized in that: described signal acquisition circuit (1) is by triode (Q3); triode (Q4) and resistance are formed; peripheral circuit is handled to the protective circuit sampling and to sampled signal and is changed d. c. voltage signal into; one end of described d. c. voltage signal input resistance (R8); the other end of described resistance (R8) is connected with the emitter of triode (Q3); the base stage of described triode (Q3) is connected with 2 pin of potentiometer (RW1); 1 pin of described potentiometer (RW1) is connected with supply power voltage (VCC); 3 pin ground connection of described potentiometer (RW1); the collector electrode of triode (Q3) is connected with the end of resistance (R10) with resistance (R9); the other end ground connection of described resistance (R9); the other end of described resistance (R10) is connected with the base stage of triode (Q4); the collector electrode of described triode (Q4) is connected with an end of pull-up resistor (R11) and the IO port P1.5 of chip (U1) respectively; the grounded emitter of described triode (Q4); the other end of described pull-up resistor (R11) is connected with the IO port P1.7 of chip (U1) by electric capacity (C4), and the other end of described pull-up resistor (R11) also is connected with the port VCC of supply power voltage (VCC) with chip (U1).

3. SCM Based Xelminator tranformer protection circuit according to claim 1; it is characterized in that: described watchdog circuit (4) is made up of chip (U2) and oscillating circuit; described oscillating circuit is by electric capacity (C8); resistance (R13) and resistance (R12) are formed; 9 of described chip (U2); 10; 11 pin respectively with electric capacity (C8); resistance (R13); resistance (R12) connects; 12 pin of described chip (U2) are connected with electric capacity (C4) with the IO port P1.7 of chip (U1) respectively; 3 pin of described chip (U2) are connected to the base stage of triode (Q2) by current-limiting resistance (R2); the collector electrode of described triode (Q2) is connected to an end of resistance (R5) and electric capacity (C3); the other end ground connection of described resistance (R5); the other end connecting resistance (R7) of described electric capacity (C3) and an end of diode (D9); described resistance (R7) other end ground connection, the other end of described diode (D9) is received 1 pin of chip (U1).

4. SCM Based Xelminator tranformer protection circuit according to claim 1; it is characterized in that: describedly comprise chip (U1) and oscillating circuit based on single-chip microcomputer governor circuit (2); described oscillating circuit comprises crystal oscillator (Y1), electric capacity (C1) and electric capacity (C2); described crystal oscillator (Y1) two ends connect electric capacity (C1) and electric capacity (C2); described electric capacity (C1) and electric capacity (C2) series connection; 4,5 bipods of described chip (U1) connect the two ends of crystal oscillator (Y1), 10 pin ground connection of described chip (U1).

5. SCM Based Xelminator tranformer protection circuit according to claim 1 is characterized in that: described control circuit (3) is connected with the IO port P1.3 of chip (U1).

6. SCM Based Xelminator tranformer protection circuit according to claim 2 is characterized in that: described triode (Q3) is a PNP triode (Q3).

7. SCM Based Xelminator tranformer protection circuit according to claim 2 is characterized in that: described triode (Q4) is a NPN triode (Q4).

8. SCM Based Xelminator tranformer protection circuit according to claim 1 is characterized in that: described power supply (6) is a supply power voltage (VCC).