CN111091999A

CN111091999A - Firing signal circuit of associated safety lock and key

Info

Publication number: CN111091999A
Application number: CN201911288159.7A
Authority: CN
Inventors: 王杰; 杨亮; 张俊; 付寒瑜
Original assignee: Yangzhou Institute Of Marine Electronic Instruments No723 Institute Of China Shipbuilding Industry Corp
Current assignee: Yangzhou Institute Of Marine Electronic Instruments No723 Institute Of China Shipbuilding Industry Corp
Priority date: 2019-12-15
Filing date: 2019-12-15
Publication date: 2020-05-01
Anticipated expiration: 2039-12-15
Also published as: CN111091999B

Abstract

The invention discloses a trigger signal circuit for associating a safety lock with a key, which comprises a trigger signal main circuit and a key control circuit, wherein the trigger signal main circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a first diode, a safety lock, a first contact and a second contact of a relay, and an indicator lamp in the key. The firing signal circuit is composed of simple components, does not need a complex circuit comprising a singlechip and the like, and has the advantages of small volume, low cost and high reliability.

Description

Firing signal circuit of associated safety lock and key

Technical Field

The invention relates to an analog circuit control technology, in particular to a firing signal circuit for associating a safety lock with a key.

Background

The trigger signal circuit in the control module in the early stage is formed by connecting a safety lock and a self-locking key in series, other control circuits are omitted, the safety lock is closed when the key is in a pressed state by mistake, a trigger command is sent out immediately, and a state to be triggered is lacked. The key with self-locking is replaced by the key without self-locking, so that the problems are solved, but multiple firing signals can be sent out by mistake in the actual use process, the expected effect of sending out a single firing signal cannot be achieved, and the reliability of the equipment is low. The trigger signal circuit is embedded with auxiliary circuits such as a single chip microcomputer and a level conversion chip, the key self-locking and jitter elimination functions are achieved through counting and timer delay, single trigger signals can be sent out, complexity and cost of the circuit are increased, and the trigger signal circuit is not suitable for wide-pressure input, complex electromagnetic environments and other occasions.

Disclosure of Invention

The invention aims to provide a trigger signal circuit for associating a safety lock with a key.

The technical solution for realizing the purpose of the invention is as follows: a firing signal circuit for associating a safety lock with a key comprises a firing signal main circuit and a key control circuit, wherein the firing signal main circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a first diode, a safety lock, a first contact and a second contact of a relay, and an indicator light in the key; the positive pole of external power connects the negative pole of first electric capacity and first diode, the power negative pole ground connection, the other end of first electric capacity and the ground connection after the positive pole of first diode links to each other, one end of insurance lock connects the negative pole of first diode, the insurance lock other end is as the A end input of key control circuit, connect the public end of first contact, the normally closed termination first resistance of first contact, first resistance other end ground connection, the normally open end of first contact links to each other with the public end of second contact, the normally closed termination second resistance of second contact, the ground connection of the second resistance other end, the normally open termination third resistance of second contact, another termination key-in pilot lamp of third resistance, the other end ground connection of pilot lamp in the key-in.

Compared with the prior art, the invention has the following remarkable advantages: 1) the analog circuit is adopted to realize the function of firing signals, and the circuit has the characteristics of simplicity, low power consumption and low cost; 2) through the cooperation of the signaling main circuit and the key control circuit, the wide-pressure input and complex electromagnetic environment can be adapted, and the accuracy and the reliability of the equipment control are improved.

Drawings

FIG. 1 is a schematic diagram of a firing signal circuit according to the present invention.

FIG. 2 is a schematic diagram of a key control circuit according to the present invention.

FIG. 3 is a flow chart of the operation of the firing signal of the present invention.

FIG. 4 is a state diagram of the key control circuit according to the present invention.

Detailed Description

The invention is further illustrated by the following examples in conjunction with the accompanying drawings.

With reference to fig. 1, a trigger signal circuit for associating a safety lock with a key comprises a trigger signal main circuit 1 and a key control circuit 2, wherein the trigger signal main circuit 1 comprises a first resistor R101, a second resistor R102, a third resistor R103, a first capacitor C101, a first diode V101, a safety lock SH101, a first contact K201B of a relay K201, a second contact K201C, and an indicator light HL101 in the key; the positive electrode of an external power supply is connected with the cathodes of the first capacitor C101 and the first diode V101, the negative electrode of the power supply is grounded, the other end of the first capacitor C101 is connected with the anode of the first diode V101 and then grounded, one end of the safety lock SH101 is connected with the cathode of the first diode V101, the other end of the safety lock SH101 serves as the input of the A end of the key control circuit and is connected with the common end C of the first contact K201B, the normally closed end nc of the first contact K201B is connected with the first resistor R101, the other end of the first resistor R101 is grounded, the normally open end no of the first contact K201B is connected with the common end C of the second contact K201C, the normally closed end nc of the second contact K201C is connected with the second resistor R102, the other end of the second resistor R102 is grounded, the normally open end no of the second contact K201C is connected with the third resistor R103, the other end of the third resistor R103 is connected with the intra-key indicator lamp HL101, and.

Rated voltage DC24V or wide voltage DC 19V-30V is input into the firing signal main circuit 1, the capacitor C101 and the voltage stabilizing diode V101 play a role in filtering and stabilizing voltage, when the safety lock SH101 is opened, the end A cannot be electrified, and no firing signal is sent out; after the safety lock SH101 is closed, the key control circuit 2 is powered.

With reference to fig. 2, the key control circuit 2 includes a key SH201 without self-locking, a fourth resistor R201, a fifth resistor R202, a sixth resistor R203, a seventh resistor R204, an eighth resistor R205, a ninth resistor R206, a tenth resistor R207, an eleventh resistor R208, a second diode V201, a third diode V202, a fourth diode V203, a fifth diode V204, a sixth diode V205, a seventh diode V206, a first triode Q201, a second triode Q202, a third triode Q203, a coil K201A of a relay K201, a second capacitor C201, and a third capacitor C202, wherein an a terminal of the key control circuit is connected to a collector of the third triode Q203, the seventh resistor R204, and the eighth resistor R205; the collector of the first triode Q201 is connected with the other end of the seventh resistor R204, the cathode of the fourth diode V203, the fourth resistor R201 and the fifth resistor R202, the other end of the fifth resistor R202 is connected with the cathode of the second diode V201, the emitter of the first triode Q201 is grounded, the base of the first triode Q201 is connected with the sixth resistor R203, the other end of the sixth resistor R203 is connected with the anode of the third diode V202, one end of the button SH201 is connected with the anode of the second diode V201 and the other end of the fourth resistor R201 and then connected with the ground through the second capacitor C201, the other end of the button SH201 is connected with the cathode of the third diode V202, the tenth resistor R207 and the anode of the sixth diode V205, the cathode of the sixth diode V205 is connected with the cathode of the seventh diode V206, and the anode of the seventh diode V206 is connected with the other end of the tenth resistor R207; the base electrode of the second triode Q202 is connected with the anode electrode of the fourth diode V203, the emitting electrode of the second triode Q202 is grounded, and the collector electrode of the second triode Q202 is connected with the other end of the eighth resistor R205 and the ninth resistor R206; the base of the third triode Q203 is connected with the other end of the ninth resistor R206 and the second capacitor C202, the emitter of the third triode Q203 is connected with the eleventh resistor R208, the anode of the seventh diode V206, the cathode of the fifth diode V204 and the coil K201A, and the other ends of the second capacitor C202, the eleventh resistor R208, the fifth diode V204 and the coil K201A are grounded.

The triggering signal work flow formed by the non-self-locking button SH201 and the safety lock SH101 in the button control circuit 2 is shown in fig. 3, when there is no command to be triggered, the safety lock SH101 is always in an open state, after there is a command to be triggered, the safety lock SH101 is closed immediately, after there is a command to be triggered, the triggering button SH201 is pressed once, the triggering signal level is sent out, the button command lamp HL101 is lightened, then triggering is released, after the command to be triggered is executed, the triggering button SH201 is pressed once, the triggering signal level is cut off, the button command lamp HL101 is extinguished, and when there is a command to be directly released, the safety lock SH101 is directly disconnected.

Fig. 4 shows a state diagram after the key control circuit (2) is powered after the safety lock SH101 is closed. In fig. 4(a), before the button SH201 is not pressed, the transistor Q202 is powered, the voltage across the capacitor C201 is DC24V, the relay K201 is not powered, the DC24V discharges through the resistor R101, and no firing signal is sent; in fig. 4(B), at the time when the button SH201 is pressed, the resistor R201 and the capacitor C201 eliminate the jitter of the button, the zener diode V202 has a regulated voltage value of 3.3V lower than the voltage on the capacitor C201, so that the transistor Q201 is turned on, the transistor Q202 is turned off, the transistor Q203 is turned on, the two ends of the relay coil K201A are at a high level close to DC24V, the normally open contacts of K201B and K201C are closed, the B end in the firing signal main circuit (1) is at DC24V, the button indicator lamp HL101 is turned on, the firing signal level of DC24V is sent out, and meanwhile, the voltage on the capacitor C201 is clamped to about 6V through the discharge loop of the diode V205, the 5.1V zener diode V206 and the resistor R208; in fig. 4(C), after the button SH201 is pressed, the voltage stabilizing value of the zener diode V202 is lower than the voltage of the resistor R207, so that the transistors Q201 and Q203 continue to be turned on, the self-locking retention function is realized, and the stable firing signal level of the DC24V is sent out, and meanwhile, through the loop formed by the diode V201, the resistor R202 and the transistor Q201, the level on the capacitor C201 is discharged from 6V to less than 1V; in fig. 4(d), at the moment when the button SH201 is pressed again, the voltage across the capacitor C201 is clamped to a low level by the loops of the resistors R201, R204, R207, and R208, and is smaller than the regulated voltage value of the zener diode V202, so that the diode V202 is not turned on, the transistors Q201 and Q203 are turned off, the transistor Q202 is turned on, the two ends of the relay coil K201A are not powered, the normally open contacts K201B and K201C are opened, the trigger signal level is cut off, and the button command lamp HL101 is turned off; after the button SH201 is pressed, the initial state in fig. 4(a) is returned again.

According to the invention, through the key control circuit, the self-locking maintaining function and the shake eliminating function without the self-locking key are realized, on one hand, the problem that the safety lock is closed and the key fails to send out the firing signal in time by mistake is avoided, on the other hand, the problem that the safety lock is closed and the key is pressed down and then sends out multiple firing signals by mistake is avoided, and the accurate sending out of a single firing signal is ensured.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A trigger signal circuit for associating a safety lock with a key is characterized by comprising a trigger signal main circuit (1) and a key control circuit (2), wherein the trigger signal main circuit (1) comprises a first resistor (R101), a second resistor (R102), a third resistor (R103), a first capacitor (C101), a first diode (V101), a safety lock (SH 101), a first contact (K201B) of a relay (K201), a second contact (K201C) and an indicator light (HL 101) in the key; the positive electrode of an external power supply is connected with the cathode of the first capacitor (C101) and the cathode of the first diode (V101), the negative electrode of the power supply is grounded, the other end of the first capacitor (C101) is connected with the anode of the first diode (V101) and then grounded, one end of the safety lock (SH 101) is connected with the cathode of the first diode (V101), the other end of the safety lock (SH 101) is used as the A end input of the key control circuit and is connected with the common end of the first contact (K201B), the normally closed end of the first contact (K201B) is connected with the first resistor (R101), the other end of the first resistor (R101) is grounded, the normally open end of the first contact (K201B) is connected with the common end of the second contact (K201C), the normally closed end of the second contact (K201C) is connected with the second resistor (R102), the other end of the second resistor (R102) is grounded, the normally open end of the second contact (K201C) is connected with the third resistor (R103), the other end of the key internal indicator lamp (HL 101) is grounded, and the other end of the.

2. The trigger signal circuit for associating a safety lock with a key of claim 1, the button control circuit (2) comprises a button (SH 201), a fourth resistor (R201), a fifth resistor (R202), a sixth resistor (R203), a seventh resistor (R204), an eighth resistor (R205), a ninth resistor (R206), a tenth resistor (R207), an eleventh resistor (R208), a second diode (V201), a third diode (V202), a fourth diode (V203), a fifth diode (V204), a sixth diode (V205), a seventh diode (V206), a first triode (Q201), a second triode (Q202), a third triode (Q203), a coil (K201A) of a relay (K201), a second capacitor (C201) and a third capacitor (C202), wherein the A end of the button control circuit is connected with the collector of the third triode (Q203), the seventh resistor (R204) and the eighth resistor (R205); the collector of the first triode (Q201) is connected with the other end of the seventh resistor (R204), the cathode of the fourth diode (V203), the fourth resistor (R201) and the fifth resistor (R202), the other end of the fifth resistor (R202) is connected with the cathode of the second diode (V201), the emitter of the first triode (Q201) is grounded, the base of the first triode (Q201) is connected with the sixth resistor (R203), the other end of the sixth resistor (R203) is connected with the anode of the third diode (V202), one end of the button (SH 201) is connected with the anode of the second diode (V201) and the other end of the fourth resistor (R201) and then connected with the ground through the second capacitor (C201), the other end of the button (SH 201) is connected with the cathode of the third diode (V202), the tenth resistor (R207) and the anode of the sixth diode (V205), the cathode of the sixth diode (V205) is connected with the cathode of the seventh diode (V206), and the anode of the seventh diode (V206) is connected with the other end of the tenth resistor (R207); the base electrode of the second triode (Q202) is connected with the anode of the fourth diode (V203), the emitter electrode of the second triode (Q202) is grounded, and the collector electrode of the second triode (Q202) is connected with the other end of the eighth resistor (R205) and the ninth resistor (R206); the base of the third triode (Q203) is connected with the other end of the ninth resistor (R206) and the second capacitor (C202), the emitter of the third triode (Q203) is connected with the eleventh resistor (R208), the anode of the seventh diode (V206), the cathode of the fifth diode (V204) and the coil K201A, and the other ends of the second capacitor (C202), the eleventh resistor (R208), the fifth diode (V204) and the coil (K201A) are grounded.

3. The associated safety lock and key firing signal circuit of claim 1 or 2, wherein the rated input voltage of the external power source is DC24V, and the voltage fluctuation range is DC 19V-30V.