CN210955421U - Alarm linkage control circuit for realizing output signal extraction - Google Patents
Alarm linkage control circuit for realizing output signal extraction Download PDFInfo
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- CN210955421U CN210955421U CN201922254635.5U CN201922254635U CN210955421U CN 210955421 U CN210955421 U CN 210955421U CN 201922254635 U CN201922254635 U CN 201922254635U CN 210955421 U CN210955421 U CN 210955421U
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Abstract
The embodiment of the application provides an alarm linkage control circuit for realizing output signal recovery, which comprises a relay J1, wherein a controlled end of the relay J1 is electrically connected with a control circuit for controlling the on-off of the relay J1, a control end of the relay is electrically connected with a signal control circuit which is controlled by a control signal and realizes linkage output signal control, and a control end of the relay is also electrically connected with a signal recovery circuit for recovering the linkage output signal; the control of the linkage output signal can be realized through the built-in switch element, and the extraction of the linkage output signal can also be realized at the same time.
Description
Technical Field
The utility model belongs to the signal control field especially relates to an alarm linkage control circuit for realizing output signal extraction.
Background
At present, the alarm linkage output system of various alarm devices basically designs corresponding hardware circuits based on relays, and outputs alarm signals to input ports of external devices by using the switching characteristics of the relays, so that the functions of linking the external devices are achieved, and corresponding alarm actions are executed.
When the environment of the alarm device meets the alarm condition, the MCU in the alarm device outputs the relay control signal after processing the alarm signal, but in the existing alarm device, the output signal recovery function can not be realized due to the limitation of the circuit structure. And the existing relay can not realize multi-path linkage and can not realize linkage control of a plurality of household devices.
Disclosure of Invention
In order to solve the shortcoming and the not enough that exist among the prior art, the utility model provides an alarm linkage control circuit for realizing that is used for realizing output signal recovery of alarm linkage can still realize linkage output signal's recovery when realizing linkage output signal control through built-in switching element.
Specifically, the alarm linkage control circuit for realizing output signal extraction that this application embodiment provided includes:
the relay J1 is characterized in that a controlled end of the relay J1 is electrically connected with a control circuit for controlling the on-off of the relay J1, a control end of the relay is electrically connected with a signal control circuit which is controlled by a control signal and realizes linkage output signal control, and a control end of the relay is also electrically connected with a signal recovery circuit for recovering the linkage output signal;
the signal control circuit is provided with a triode Q2 for receiving a control signal and realizing on-off control and a PMOS tube Q1 for realizing linkage output signal control, and the signal control circuit is provided with a slot P1 for connecting peripheral linkage equipment.
Optionally, the control circuit includes:
a power supply end VIN electrically connected to a pin 1 of the relay J1 and a triode Q3 electrically connected to a pin 12 of the relay, wherein a bleeder diode D1 is connected in parallel between the pin 1 and the pin 12 of the relay J1;
the base of the transistor Q3 is also electrically connected to the delay control terminal of the microcontroller via a resistor R6, and the emitter of the transistor Q3 is grounded.
Optionally, the signal control circuit includes:
a PMOS tube Q1, wherein the source electrode of the PMOS tube Q1 is electrically connected with a pin 6 of a relay J1, the grid electrode of the Q1 is electrically connected with a triode Q2, the base electrode of the triode Q2 is electrically connected with the level control end of the microcontroller through a resistor R5, the emitter electrode of the triode Q2 is grounded, a resistor R1 is electrically connected between the grid electrode and the source electrode of the PMOS tube Q1, and the source electrode of the PMOS tube Q1 is grounded through a filter capacitor C2;
the drain of the PMOS transistor Q1 is electrically connected to the socket P1, the pins 7 and 8 of the relay J1 are electrically connected to the socket P1, and the pin 2 in the socket P1 is grounded.
Optionally, the signal extraction circuit includes:
the resistor R3 is electrically connected with the drain electrode of the PMOS tube Q1, and one end of the resistor R3, which is far away from the drain electrode of the PMOS tube Q1, is also connected to the level detection end of the microcontroller through the resistor R4;
a resistor R2 and a capacitor C1 are further arranged between the resistor R3 and the resistor R4, and terminal pins of the resistor R2 and the capacitor C1 far away from the resistor R3 are grounded.
Optionally, pin 3 and pin 4 of slot P1 are connected to the peripheral linkage device;
the peripheral linkage equipment comprises a gas meter, an exhaust fan, an electromagnetic valve and an intelligent home gateway.
The utility model provides a beneficial effect that technical scheme brought is:
1. the circuit for sampling the linkage signal is additionally arranged in the alarm linkage control circuit, so that the linkage output signal can be monitored in real time, and an alarm is given when the detected voltage value is abnormal.
2. The bleeder diode D1 is added to the control circuit to prevent the counter electromotive force generated by the coil from possibly breaking down the transistor driving the relay coil, thereby ensuring the stability of the switching state of the relay switch.
3. And a switch control circuit is designed for the linkage output signal, so that the controllability of the linkage output signal is realized.
4. The voltage division and filtering processing is carried out on the output voltage signal which needs to be detected, and the reliability of the output level signal is ensured.
5. The control end of the relay J1 is communicated with peripheral linkage equipment through the slot P1, linkage of the relay J1 and the peripheral equipment is achieved, and usability of the control circuit is expanded.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of module connections of an alarm linkage control circuit for realizing output signal extraction according to an embodiment of the present application;
fig. 2 is a schematic circuit structure diagram of an alarm linkage control circuit for realizing output signal extraction according to an embodiment of the present application.
Detailed Description
In order to make the structure and advantages of the present invention clearer, the structure of the present invention will be further described with reference to the accompanying drawings.
Example one
Specifically, the alarm linkage control circuit for realizing the output signal recovery provided in the embodiment of the present application is configured to receive a control signal output by a microcontroller, and control a linkage output signal of a gas meter, an electromagnetic valve, and an exhaust fan according to specific content of the control signal, and specifically, as shown in fig. 1, the circuit structure of the alarm linkage control circuit for realizing the output signal recovery includes the following three modules, that is, a relay control circuit, a linkage output signal control circuit, and a linkage output signal recovery circuit.
The connection relationship of the three modules is that on the basis of the relay J1, a controlled end of the relay J1 is electrically connected with a control circuit for controlling the on-off of the relay J1, a control end of the relay is electrically connected with a signal control circuit which is controlled by a control signal and realizes linkage output signal control, and the control end of the relay is also electrically connected with a signal extraction circuit for extracting the linkage output signal; the signal control circuit is provided with a triode Q2 for receiving a control signal and realizing on-off control and a PMOS tube Q1 for realizing linkage output signal control.
Specifically, the control circuits in the three modules include:
a power supply end VIN electrically connected to a pin 1 of the relay J1 and a triode Q3 electrically connected to a pin 12 of the relay, wherein a bleeder diode D1 is connected in parallel between the pin 1 and the pin 12 of the relay J1;
the base of the transistor Q3 is also electrically connected to the delay control terminal of the microcontroller via a resistor R6, and the emitter of the transistor Q3 is grounded. In the initial state, pins 4 and 5 of the relay J1 are closed, pins 8 and 9 are closed, and no current passes through the coil in the relay J1. When the environment of the alarm device meets the alarm condition, the MCU main control circuit processes the alarm signal and then outputs a Relay J1 control signal (MCU-Relay-CTL) to be at a high level, the triode Q3 is conducted, the power supply voltage VIN passes through a coil winding of the Relay J1 to generate a loop current, and the coil winding generates suction force to enable the on-off state of the Relay J1 to be switched (5 and 6 pins are closed, and 7 and 8 pins are closed). Wherein, the output of the pins 5 and 6 is an active signal which can be used for driving external equipment (such as an electromagnetic valve) to alarm and output in a linkage way; in addition, the output of the pins 7 and 8 is a passive signal which is used for linking equipment such as an exhaust fan, a gas meter and the like to execute an alarm action; after the alarm state is relieved, the control signal of the relay J1 is at a low level, the current of the coil of the relay J1 is quickly released through the release diode D1, so that the internal switch state of the relay J1 is quickly restored to the previous state, and alarm linkage output is not performed. In the control circuit described in this section, the bleeder diode D1 is added to ensure the reliability and stability of the switching state of the relay J1.
Optionally, the signal control circuit in the three modules includes:
a PMOS tube Q1, wherein the source electrode of the PMOS tube Q1 is electrically connected with a pin 6 of a relay J1, the grid electrode of the Q1 is electrically connected with a triode Q2, the base electrode of the triode Q2 is electrically connected with the level control end of the microcontroller through a resistor R5, the emitter electrode of the triode Q2 is grounded, a resistor R1 is electrically connected between the grid electrode and the source electrode of the PMOS tube Q1, and the source electrode of the PMOS tube Q1 is grounded through a filter capacitor C2; the drain of the PMOS transistor Q1 is electrically connected to the socket P1, the pins 7 and 8 of the relay J1 are electrically connected to the socket P1, and the pin 2 in the socket P1 is grounded.
Linkage output signal control circuit: the automatic alarm device mainly comprises a PMOS (P-channel metal oxide semiconductor) tube Q1, a triode Q2, resistors R1 and R5 and a filter capacitor C2, and is used for realizing the controllability of linkage output signals and achieving the controllability of alarm linkage output.
The specific process comprises the following steps: when the linkage signal needs to be output externally, the MCU control signal (MCU-VIN-CTL) is at a high level, the triode Q2 is in saturated conduction, and the conduction condition of the PMOS transistor Q1 is further met, so that external active output is realized, and peripheral equipment is driven to execute an alarm action; when the alarm linkage output is not needed, the MCU control signal (MCU-VIN-CTL) is at a low level, the triode Q2 is in a cut-off state, and the PMOS tube Q1 is not conducted and does not carry out active output to the outside. And a switch control circuit is designed for the linkage output signal, so that the controllability of the linkage output signal is realized.
Optionally, the signal extraction circuit in the three modules includes:
the resistor R3 is electrically connected with the drain electrode of the PMOS tube Q1, and one end of the resistor R3, which is far away from the drain electrode of the PMOS tube Q1, is also connected to the level detection end of the microcontroller through the resistor R4; a resistor R2 and a capacitor C1 are further arranged between the resistor R3 and the resistor R4, and terminal pins of the resistor R2 and the capacitor C1 far away from the resistor R3 are grounded.
Linkage output signal extraction circuit: the voltage detection circuit mainly comprises resistors R2, R3, R4 and a capacitor C1 and is used for achieving the extraction function of linkage output signals, wherein a voltage division circuit is formed by R2 and R3, R4 is a current-limiting resistor, C1 is a filter capacitor and is mainly used for carrying out voltage detection on the linkage output signals, whether the linkage output signals are normal or not is judged according to detected voltage values, corresponding voltage detection is carried out on an ADC (analog to digital converter) port of an MCU (micro control unit), and when the detected voltage values are abnormal, an alarm is given. And the recovery is carried out on the linkage output signal, so that the real-time monitoring on the state of the linkage output signal is realized, and the stability of a linkage output system is improved. The voltage division, filtering and current limiting processing are carried out on the output voltage signal to be detected, so that the reliability and stability of the output level signal are ensured.
Based on the structural description of the three modules, the specific structure of the alarm linkage control circuit for realizing the output signal extraction provided by the embodiment is shown in fig. 2.
Optionally, pin 3 and pin 4 of slot P1 are connected to the peripheral linkage device;
the peripheral linkage equipment comprises a gas meter, an exhaust fan, an electromagnetic valve and an intelligent home gateway.
In implementation, the alarm linkage control circuit provided in this embodiment may implement expansion of peripheral functions through the spare pins 3 and 4 of the slot P1, in addition to the signal monitoring and signal recovery functions provided in the foregoing. As can be seen from the connection between the relay J1 and the slot P1 in fig. 2, the relay J1 can directly control the peripheral linkage device connected to the slot P1.
For example, when the exhaust fan is connected through the slot P1, if the current voltage value is judged to be abnormal through signal sampling and alarm is required, the exhaust fan can be communicated with the gas meter alarm loop to realize light alarm, the exhaust fan loop is communicated to exhaust to prevent gas poisoning, the electromagnetic valve loop is communicated to cut off a gas pipeline, the intelligent home gateway is communicated to realize subsequent linkage control of the internet of things, and the like, and other linkage devices are not described in detail herein.
The sequence numbers in the above embodiments are merely for description, and do not represent the sequence of the assembly or the use of the components.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. A warning linkage control circuit for realizing output signal extraction, its characterized in that, the circuit includes:
the relay J1 is characterized in that a controlled end of the relay J1 is electrically connected with a control circuit for controlling the on-off of the relay J1, a control end of the relay is electrically connected with a signal control circuit which is controlled by a control signal and realizes linkage output signal control, and a control end of the relay is also electrically connected with a signal recovery circuit for recovering the linkage output signal;
the signal control circuit is provided with a triode Q2 for receiving a control signal and realizing on-off control and a PMOS tube Q1 for realizing linkage output signal control, and the signal control circuit is provided with a slot P1 for connecting peripheral linkage equipment.
2. The alarm linkage control circuit for achieving output signal extraction according to claim 1, wherein the control circuit comprises:
a power supply end VIN electrically connected with a pin 1 of the relay J1 and a triode Q3 electrically connected with a pin 12 of the relay, wherein a bleeder diode D1 is connected in parallel between the pin 1 and the pin 12 of the relay J1;
the base of the transistor Q3 is also electrically connected to the delay control terminal of the microcontroller via a resistor R6, and the emitter of the transistor Q3 is grounded.
3. The alarm linkage control circuit for realizing output signal extraction according to claim 1, wherein the signal control circuit comprises:
a PMOS tube Q1, wherein the source electrode of the PMOS tube Q1 is electrically connected with a pin 6 of a relay J1, the grid electrode of the Q1 is electrically connected with a triode Q2, the base electrode of the triode Q2 is electrically connected with the level control end of the microcontroller through a resistor R5, the emitter electrode of the triode Q2 is grounded, a resistor R1 is electrically connected between the grid electrode and the source electrode of the PMOS tube Q1, and the source electrode of the PMOS tube Q1 is grounded through a filter capacitor C2;
the drain of the PMOS transistor Q1 is electrically connected to the socket P1, the pins 7 and 8 of the relay J1 are electrically connected to the socket P1, and the pin 2 in the socket P1 is grounded.
4. The alarm linkage control circuit for achieving output signal extraction according to claim 1, wherein the signal extraction circuit comprises:
the resistor R3 is electrically connected with the drain electrode of the PMOS tube Q1, and one end of the resistor R3, which is far away from the drain electrode of the PMOS tube Q1, is also connected to the level detection end of the microcontroller through the resistor R4;
a resistor R2 and a capacitor C1 are further arranged between the resistor R3 and the resistor R4, and terminal pins of the resistor R2 and the capacitor C1 far away from the resistor R3 are grounded.
5. The alarm linkage control circuit for realizing output signal extraction according to any one of claims 1 to 4, wherein a pin 3 and a pin 4 of a slot P1 are connected with peripheral linkage equipment;
the peripheral linkage equipment comprises one or more of a gas meter, an exhaust fan and an electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922254635.5U CN210955421U (en) | 2019-12-16 | 2019-12-16 | Alarm linkage control circuit for realizing output signal extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922254635.5U CN210955421U (en) | 2019-12-16 | 2019-12-16 | Alarm linkage control circuit for realizing output signal extraction |
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| Publication Number | Publication Date |
|---|---|
| CN210955421U true CN210955421U (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922254635.5U Active CN210955421U (en) | 2019-12-16 | 2019-12-16 | Alarm linkage control circuit for realizing output signal extraction |
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| Country | Link |
|---|---|
| CN (1) | CN210955421U (en) |
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- 2019-12-16 CN CN201922254635.5U patent/CN210955421U/en active Active
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