Level signal triggering module for use in fire fighting equipment

Abstract

The utility model discloses a kind of level signal triggering module in fire-fighting equipment, including edge detection module, single-chip microcontroller chip and relay control output module, edge detection module is used to detect the edge change of external level signal, and when detecting the falling edge of external level signal, it makes its signal output end open circuit, when detecting the rising edge of external level signal, generating trigger signal;The signal input end of single-chip microcontroller chip is connected with the signal output end of edge detection module, and single-chip microcontroller chip can be controlled according to trigger signal to make relay control output module be in conduction state.The structure of the level signal triggering module is simple, novel, reasonable, can be realized when level signal jumps output an adjustable short pulse trigger signal, and based on the short pulse trigger signal, the start of relay control output module is realized, meets the control requirement of complex control loop, improves the flexibility of electrical circuit design.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a level signal triggering module for use in fire protection equipment. Background Technology

[0002] Existing industrial time relays only have power-on delay and power-off delay functions, and cannot output an adjustable short pulse signal at the moment of power failure, which to some extent limits their application efficiency and flexibility in complex control scenarios.

[0003] In view of the above, this utility model is hereby proposed. Summary of the Invention

[0004] To overcome the above-mentioned defects, this utility model provides a level signal triggering module for fire protection equipment. It has a simple, novel and reasonable structure and can output an adjustable short pulse triggering signal when the level signal changes. Based on the short pulse triggering signal, the relay control output module can be started. It can well meet the control requirements of complex control circuits and improve the flexibility of electrical circuit design.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a level signal triggering module for fire-fighting equipment, including an edge detection module, a microcontroller chip, and a relay control output module. The edge detection module is used to detect edge changes of external level signals, and opens its signal output terminal when a falling edge of the external level signal is detected, and generates a trigger signal when a rising edge of the external level signal is detected. The signal input terminal of the microcontroller chip is connected to the signal output terminal of the edge detection module, and the microcontroller chip can control the relay control output module to be in a conducting state according to the trigger signal.

[0006] As a further improvement of this utility model, a voltage regulator module is also provided, which is used to convert the external power supply into the working voltage and supply power to the edge detection module and the microcontroller chip.

[0007] As a further improvement of this utility model, the edge detection module includes a signal input interface for receiving external level signals and a first transistor. The emitter of the first transistor is grounded and the base is connected to the signal input interface. Two branches are led out from the collector of the first transistor. One of the branches is used as the signal output terminal of the edge detection module, and the other branch is connected to the output terminal of the voltage regulator module.

[0008] As a further improvement of this utility model, a first interface for connecting to the positive terminal of the external power supply, a second interface for connecting to the negative terminal of the external power supply, and a first diode connected to the first interface are also provided; the input terminal of the voltage regulator module is connected to the cathode of the first diode.

[0009] As a further improvement of this utility model, the relay control output module includes a second transistor, a relay, an action indicator light, and a second diode. The emitter of the second transistor is grounded, and the base is connected to the control output terminal of the microcontroller chip. The coil of the relay, the action indicator light, and the second diode are connected in parallel, and one end of the coil of the relay is connected to the collector of the second transistor. The anode of the action indicator light is connected to the cathode of the first diode.

[0010] As a further improvement of this utility model, the microcontroller chip is a PIC12F509 chip, and the CLKIN pin of the microcontroller chip is its signal input terminal, and the C1OUT pin is its control output terminal.

[0011] As a further improvement of this utility model, a power indicator light is also provided, wherein the anode of the power indicator light is connected to the cathode of the first diode, and the cathode of the power indicator light is grounded.

[0012] The beneficial effects of this utility model are: the circuit structure of the level signal triggering module for fire-fighting equipment described in this utility model is simple, novel and reasonable. It can output an adjustable short pulse triggering signal when the level signal changes, and realize the start of the relay control output module based on the short pulse triggering signal, thereby well meeting the control requirements of complex control circuits and improving the flexibility of electrical circuit design. Attached Figure Description

[0013] Figure 1 This is a block diagram illustrating the working principle of the level signal triggering module for fire-fighting equipment described in this utility model.

[0014] Figure 2 This is a schematic diagram of the circuit principle of the level signal triggering module used in fire-fighting equipment according to the present invention.

[0015] Referring to the accompanying drawings, the following explanations are provided:

[0016] 1. Edge detection module; 10. Signal output terminal; 2. Microcontroller chip; 3. Relay control output module; 4. Voltage regulator module. Detailed Implementation

[0017] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Example

[0019] Please see the appendix Figure 1 and 2 As shown, this embodiment provides a level signal triggering module for fire-fighting equipment, including an edge detection module 1, a microcontroller chip 2, and a relay control output module 3. The edge detection module 1 detects edge changes in an external level signal, and opens its signal output terminal 10 when a falling edge of the external level signal is detected, and generates a trigger signal when a rising edge of the external level signal is detected. The signal input terminal of the microcontroller chip 2 is connected to the signal output terminal 10 of the edge detection module 1, and the microcontroller chip 2 can control the relay control output module 3 to be in a conducting state according to the trigger signal. It is understood that the level signal triggering module of this embodiment can output an adjustable short pulse trigger signal when the level signal changes, and start the relay control output module based on the short pulse trigger signal, thereby well meeting the control requirements of complex control loops and improving the flexibility of electrical circuit design.

[0020] The following provides a detailed description of the specific circuit structure and working principle of the level signal triggering module used in fire-fighting equipment as described in this embodiment.

[0021] Please continue to refer to the appendix. Figure 1 and 2 As shown, the level signal triggering module provided in this embodiment is further provided with a voltage regulator module 4, which is used to convert the external power supply into the working voltage and supply power to the edge detection module 1 and the microcontroller chip 2.

[0022] For further details, please refer to the appendix. Figure 2 As shown, the voltage regulator module 4 adopts a traditional voltage regulator circuit structure, which mainly includes a 78L05 linear regulator U1, a first capacitor C2, a second capacitor C3, and a ninth resistor R9. The first capacitor C2 and the second capacitor C3 act as filters, ensuring a stable voltage output; the ninth resistor R9 acts as a voltage divider, ensuring the voltage in the circuit remains within a safe range. Additionally, from the attached... Figure 2 It can be seen that after the external power supply is processed by the voltage regulator module 4, it can provide a 5V operating voltage to the edge detection module 1 and the microcontroller chip 2.

[0023] For further details, please refer to the appendix. Figure 2As shown, to enable the voltage regulator module 4 to connect to an external power supply, the level signal triggering module in this embodiment also includes a first interface J1 for connecting to the positive terminal of the external power supply, a second interface J2 for connecting to the negative terminal of the external power supply, and a first diode D1 connected to the first interface J1. The first diode D1 serves to prevent reverse connection, and its cathode is connected to the input terminal of the voltage regulator module 4. Further considering the circuit structure of the voltage regulator module 4, the cathode of the first diode D1 is connected to the input terminal (pin 3) of the linear regulator U1.

[0024] For further details, please refer to the appendix. Figure 2 As shown, the level signal triggering module in this embodiment also includes a power indicator D4 (using an LED). The anode of the power indicator D4 is connected to the cathode of the first diode D1, and the cathode of the power indicator D4 is grounded after being connected in series with a fifth resistor R5. It can be understood that when the first interface J1 and the second interface J2 are connected to an external power source, the level signal triggering module in this embodiment enters the working state, and the power indicator D4 illuminates to indicate this.

[0025] Please continue to refer to the appendix. Figure 1 and 2 As shown, in the level signal triggering module provided in this embodiment, the circuit structure of the edge detection module 1 preferably includes a signal input interface J3 for receiving external level signals and a first transistor Q1. The emitter of the first transistor Q1 is grounded, the base of the first transistor Q1 is connected to the signal input interface J3, and two branches are led out from the collector of the first transistor Q1. One of the branches is used as the signal output terminal 10 of the edge detection module 1, and the other branch is connected to the output terminal of the voltage regulator module 4. Understandably, when the external level signal received by the signal input interface J3 changes from high level to low level, the first transistor Q1 is in the cutoff state. That is, at this time, the signal output terminal 10 of the first transistor Q1 is open and cannot output a signal. Correspondingly, the signal input terminal of the microcontroller chip 2 also cannot receive a signal. However, when the external level signal received by the signal input interface J3 changes from low level to high level, the first transistor Q1 is in the saturated conduction state. Correspondingly, its signal output terminal 10 can output a trigger signal, and the signal input terminal of the microcontroller chip 2 can receive the trigger signal.

[0026] For further details, please refer to the appendix. Figure 2As shown, the edge detection module 1 structure also includes a second resistor R2, a third resistor R3, and a fourth resistor R4. The second resistor R2 is connected between the collector of the first transistor Q1 and the output terminal of the voltage regulator module 4, serving as a voltage divider and current limiter. The third resistor R3 is connected between the signal input interface J3 and the base of the first transistor Q1. The fourth resistor R4 is connected between the base and emitter of the first transistor Q1. The third resistor R3 and the fourth resistor R4 work together to prevent short circuits.

[0027] Please continue to refer to the appendix. Figure 1 and 2 As shown, in the level signal triggering module provided in this embodiment, the microcontroller chip 2 is preferably a PIC12F509 chip. The PIC12F509 chip is a common 8-bit flash memory microcontroller chip on the market, which has core processing functions (8-bit CPU, Harvard bus structure), storage functions (flash program memory, data memory), input / output functions, clock and oscillation functions, interrupt functions, timer functions, etc. As it is a well-known technology, it will not be described in detail here.

[0028] Further from the appendix Figure 2 It can be seen that: the VDD pin (i.e., pin 1) of the microcontroller chip 2 is connected to the output terminal of the voltage regulator module 4; the CLKIN pin (i.e., pin 2) is the signal input terminal of the microcontroller chip 2, used to communicate with the signal output terminal 10 of the first transistor Q1; and the C1OUT pin (i.e., pin 5) is the control output terminal of the microcontroller chip 2, used to connect to the input terminal of the relay control output module 3. In addition, the J5 interface in the microcontroller chip 2 is the programming interface of the microcontroller, used to read the signal from the encoder K1.

[0029] Please continue to refer to the appendix. Figure 1 and 2As shown, in the level signal triggering module provided in this embodiment, the circuit structure of the relay control output module 3 preferably includes a second transistor Q2, a relay J4, an action indicator D2 (using an LED), and a second diode D3. The emitter of the second transistor Q2 is grounded, and the base of the second transistor Q2 is connected to the control output terminal of the microcontroller chip 2 (i.e., the C1OUT pin mentioned above). The coil KT1A of the relay J4, the action indicator D2, and the second diode D3 are connected in parallel. One end of the coil KT1A of the relay J4 is connected to the collector of the second transistor Q2, and the anode of the action indicator D2 is connected to the cathode of the first diode D1. Understandably, when the signal input terminal of the microcontroller chip 2 receives the trigger signal, the microcontroller chip 2 performs internal program calculations and outputs a control signal through its control output terminal. After the relay control output module 3 receives the control signal, the second transistor Q2 is turned on, and correspondingly, the relay control output module 3 is energized as a whole. That is, at that time, the contacts of the relay J4 close and conduct, and the action indicator D2 lights up.

[0030] Furthermore, since the microcontroller chip 2 integrates a timer function, the microcontroller chip 2 can control the relay J4 to disconnect and recover after a set time of contact closure and conduction by setting a timer.

[0031] For further details, please refer to the appendix. Figure 2 As shown, the relay control output module 3 also includes a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8. The sixth resistor R6 is connected between the action indicator D2 and the second diode D3, serving to limit current and divide voltage. One end of the seventh resistor R7 and the eighth resistor R8 are connected in parallel to the base of the second transistor Q2. The other end of the seventh resistor R7 is connected to the control output terminal of the microcontroller chip 2, and the other end of the eighth resistor R8 is connected to the emitter of the second transistor Q2. The seventh resistor R7 and the eighth resistor R8 work together to prevent short circuits.

[0032] Through the detailed description of the specific circuit structure of the level signal triggering module described in this embodiment, its working principle can be understood as follows:

[0033] S1: When the first interface J1 and the second interface J2 are connected to an external power source, the level signal trigger module enters the working state, and the power indicator D4 lights up; at this time, if:

[0034] ① When the external level signal received by the signal input interface J3 changes from high level to low level, the first transistor Q1 is in the cut-off state, and the signal input terminal of the microcontroller chip 2 cannot receive a signal.

[0035] ② When the external level signal received by the signal input interface J3 changes from low level to high level, the first transistor Q1 is in a saturated conduction state, and its signal output terminal 10 outputs a trigger signal.

[0036] S2: After receiving the trigger signal at the signal input terminal of the microcontroller chip 2, the microcontroller chip 2 performs internal program calculations and outputs control signals through its control output terminal.

[0037] After receiving the control signal, the second transistor Q2 is turned on, and the relay control output module 3 is energized. At that time, the contacts of the relay J4 close and conduct, and the action indicator D2 lights up.

[0038] S3: The microcontroller chip 2 controls the relay J4 to disconnect and restore after a set time of contact closure and conduction by setting a timer.

[0039] In summary, the circuit structure of the level signal trigger module of this utility model is simple, novel, and reasonable. It can output an adjustable short pulse trigger signal when the level signal changes, and realize the start of the relay control output module based on the short pulse trigger signal. It can well meet the control requirements of complex control circuits and improve the flexibility of electrical circuit design.

[0040] Finally, it should be noted that the prefixes "first," "second," etc., in the component names in this specification (such as first transistor, second transistor, etc.) are only for clarity of description and are not intended to limit the scope of this utility model patent.

[0041] Many specific details have been set forth in the above description to provide a full understanding of this utility model. However, the above description is only a preferred embodiment of this utility model, and this utility model can be implemented in many other ways different from those described herein. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A level signal triggering module for use in fire-fighting equipment, characterized in that: The system includes an edge detection module (1), a microcontroller chip (2), and a relay control output module (3). The edge detection module (1) is used to detect edge changes of external level signals and to open its signal output terminal (10) when a falling edge of the external level signal is detected, and to generate a trigger signal when a rising edge of the external level signal is detected. The signal input terminal of the microcontroller chip (2) is connected to the signal output terminal (10) of the edge detection module (1), and the microcontroller chip (2) can control the relay control output module (3) to be in the conducting state according to the trigger signal.

2. The level signal triggering module for fire-fighting equipment according to claim 1, characterized in that: It also includes a voltage regulator module (4), which converts the external power supply into a working voltage and supplies power to the edge detection module (1) and the microcontroller chip (2).

3. The level signal triggering module for fire-fighting equipment according to claim 2, characterized in that: The edge detection module (1) includes a signal input interface for receiving external level signals and a first transistor. The emitter of the first transistor is grounded and the base is connected to the signal input interface. Two branches are led out from the collector of the first transistor. One of the branches is used as the signal output terminal (10) of the edge detection module (1), and the other branch is connected to the output terminal of the voltage regulator module (4).

4. The level signal triggering module for fire-fighting equipment according to claim 2, characterized in that: It also includes a first interface for connecting to the positive terminal of the external power supply, a second interface for connecting to the negative terminal of the external power supply, and a first diode connected to the first interface; the input terminal of the voltage regulator module (4) is connected to the cathode of the first diode.

5. The level signal triggering module for fire-fighting equipment according to claim 4, characterized in that: The relay control output module (3) includes a second transistor, a relay, an action indicator light, and a second diode. The emitter of the second transistor is grounded, and the base is connected to the control output terminal of the microcontroller chip (2). The coil of the relay, the action indicator light, and the second diode are connected in parallel. One end of the coil of the relay is connected to the collector of the second transistor, and the anode of the action indicator light is connected to the cathode of the first diode.

6. The level signal triggering module for fire-fighting equipment according to claim 1, characterized in that: The microcontroller chip (2) is a PIC12F509 chip. The CLKIN pin of the microcontroller chip (2) is its signal input terminal, and the C1OUT pin is its control output terminal.

7. The level signal triggering module for fire-fighting equipment according to claim 4, characterized in that: It is also equipped with a power indicator light, the anode of which is connected to the cathode of the first diode, and the cathode of which is grounded.

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