CN220491204U - Two-wire system multi-wire control and detection circuit and fire alarm controller - Google Patents
Two-wire system multi-wire control and detection circuit and fire alarm controller Download PDFInfo
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- CN220491204U CN220491204U CN202322206781.7U CN202322206781U CN220491204U CN 220491204 U CN220491204 U CN 220491204U CN 202322206781 U CN202322206781 U CN 202322206781U CN 220491204 U CN220491204 U CN 220491204U
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Abstract
The utility model discloses a two-wire multi-wire control and detection circuit and a fire alarm controller, wherein the two-wire multi-wire control and detection circuit comprises a control module which is connected with controlled equipment and is provided with a power supply for driving the controlled equipment to work; the excitation module is connected between the control module and the controlled equipment and used for providing an excitation signal; the detection module is connected between the control module and the controlled equipment and is used for detecting whether the state of a circuit in the two-wire multi-wire control and detection circuit is abnormal after the excitation module provides the excitation signal; the central control detection module is connected with the control module and the detection module and is used for starting the control module when the state of a circuit in the two-wire multi-wire control and detection circuit is normal. Compared with the prior art, the utility model realizes that the external control circuit, the power supply circuit and the detection circuit share the same group of cables, and reduces the construction cost.
Description
Technical Field
The utility model relates to a two-wire fire alarm controller and a fire-fighting linkage controller product, in particular to a two-wire multi-wire control and detection circuit and a fire alarm controller.
Background
The original four-wire fire alarm system needs to output a group of 24V power supplies to the site additionally, the fire alarm controller is connected with front-end equipment through four wires, the complexity is high in the site construction process, and the construction cost and the cable cost are improved.
Along with the development of technology, the related technology of the two-wire system matched bus product is more and more mature, construction is simplified, and construction cost and cable cost are reduced, so that the four-wire system fire alarm system is gradually replaced by the two-wire system fire alarm system, the multi-wire part in the original four-wire system fire alarm system needs four wires to complete the control and detection functions, and in order to meet the functions and reduce construction cost, the design of the two-wire system multi-wire control and detection circuit is necessary.
Disclosure of Invention
Aiming at the problem that the existing fire alarm system needs four wires to complete the control and detection functions in the prior art, the utility model provides a two-wire multi-wire control and detection circuit and a fire alarm controller.
The technical scheme of the utility model is that a two-wire system multi-wire control and detection circuit is provided, comprising:
the control module is connected with the controlled equipment and provided with a power supply for driving the controlled equipment to work;
the excitation module is connected between the control module and the controlled equipment and used for providing an excitation signal;
the detection module is connected between the control module and the controlled equipment and is used for detecting whether the state of a circuit in the two-wire multi-wire control and detection circuit is abnormal after the excitation module provides the excitation signal;
the central control detection module is connected with the control module and the detection module and is used for starting the control module when the state of a circuit in the two-wire multi-wire control and detection circuit is normal.
Further, the method further comprises the following steps:
the strong starting module is connected between the control module and the controlled equipment and provided with a driving resistor and a strong starting circuit, the strong starting circuit is used for strongly starting the controlled equipment when the control module is started, and the driving resistor is used for maintaining the controlled equipment to act when the control module is stable.
Further, the control module includes: transistor Q1, transistor Q2, resistor R3, resistor R4;
the collector of the triode Q2 is sequentially connected with the resistor R2 and the resistor R4 in series and then connected to a 24V power supply, the emitter is grounded, and the base is connected with the resistor R3 in series and then connected to the central control detection module;
the emitter of the triode Q1 is connected to a 24V power supply, the collector is connected to the controlled device, and the base is connected between the resistor R2 and the resistor R4.
Further, the excitation module includes: a resistor R1 and a diode D1;
the positive electrode of the diode D1 is connected to a 12V power supply, the negative electrode of the diode D1 is connected in series with the resistor R1, and then the diode D1 is connected between the control module and the controlled equipment.
Further, the detection module includes: resistor R8, resistor R9, capacitor C2;
one end of the resistor R8 is connected between the control module and the controlled equipment, the other end of the resistor R9 is connected in series and then grounded, and the capacitor C2 is connected in parallel with two ends of the resistor R9;
the detection module is also provided with a detection pin connected with the central control detection module, and the detection pin is also connected between the resistor R8 and the resistor R9.
Further, before the control module is started, the detection module is used for detecting the state of a circuit in the two-wire multi-wire control and detection circuit;
when the voltage detected by the detection pin is lower than a first threshold voltage, the state of a circuit in the two-wire multi-wire control and detection circuit is a short circuit state;
when the voltage detected by the detection pin is higher than a second threshold voltage, the state of the circuit in the two-wire multi-wire control and detection circuit is an open-circuit state.
After the control module is started, the detection module is used for detecting whether the controlled equipment normally accesses to work.
Further, the strong starting module comprises a resistor R7 serving as the driving resistor, a resistor R5, a resistor R6, a triode Q3 and a capacitor C1 which form the strong starting circuit;
the resistor R7 is connected in series between the control module and the controlled device, one end of the capacitor C1 is connected between the control module and the resistor R7, and the other end of the capacitor C1 is connected between the resistor R7 and the controlled device after being sequentially connected with the resistor R5 and the resistor R6;
the collector of the triode Q3 is connected between the capacitor C1 and the resistor R7, the emitter is connected between the resistor R6 and the resistor R7, and the base is connected between the resistor R5 and the resistor R6.
Further, the strong starting time of the strong starting module is 20ms, and the strong starting time is regulated through the driving resistor and parameters of components in the strong starting circuit;
wherein, the resistance value of the resistor R5 is 4.7KΩ, the resistance value of the resistor R6 is 100KΩ, the resistance value of the resistor R7 is 200Ω, and the capacitance value of the capacitor C1 is 4.7uF.
Further, when the central control detection module sends out a high-level signal, the control module is started;
when the central control detection module sends out a low level, the control module is closed.
The utility model also provides a fire alarm controller which is provided with the two-wire multi-wire control and detection circuit.
Compared with the prior art, the utility model has at least the following beneficial effects:
the utility model is provided with the control module, the forced starting module, the excitation module, the detection module and the central control detection module, and the control, power supply and detection circuits share the same group of cables, so that the construction cost and the material cost of the cables are reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a two-wire multi-wire control and detection circuit of the present utility model;
fig. 2 is a block diagram of a two-wire multi-wire control and detection circuit according to the present utility model.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. Thus, reference throughout this specification to one feature will be used in order to describe one embodiment of the utility model, not to imply that each embodiment of the utility model must be in the proper motion. Furthermore, it should be noted that the present specification describes a number of features. Although certain features may be combined together to illustrate a possible system design, such features may be used in other combinations not explicitly described. Thus, unless otherwise indicated, the illustrated combinations are not intended to be limiting.
The principles and structures of the present utility model are described in detail below with reference to the drawings and the examples.
The four-wire fire alarm system is gradually replaced by the two-wire fire alarm system, and the control and detection functions are completed by four wires in the multi-wire part of the original four-wire fire alarm system.
Specifically, the two-wire system multi-wire control and detection circuit provided by the utility model comprises:
the control module is connected with the controlled equipment and provided with a power supply for driving the controlled equipment to work;
the excitation module is connected between the control module and the controlled equipment and is used for providing an excitation signal;
the detection module is connected between the control module and the controlled equipment and is used for detecting whether the state of a circuit in the two-wire multi-wire control and detection circuit is abnormal after the excitation module provides an excitation signal;
the central control detection module is connected with the control module and the detection module and is used for starting the control module when the state of a circuit in the two-wire multi-wire control and detection circuit is normal.
Here, the control module has a power supply (or is connected to a power supply), which can act as a power supply cable;
the central control detection module can adjust the work of the control module according to the state of the detection circuit of the detection module, and is matched with the control module to serve as a control cable together;
the excitation module and the detection module can cooperate so as to detect the state of the line, which can act as a detection cable.
Therefore, the control, power supply and detection circuits share the same group of cables, and the construction cost and the material cost of the cables are reduced.
In addition, the two-wire multi-wire control and detection circuit provided by the utility model further comprises:
the strong starting module is connected between the control module and the controlled equipment and provided with a driving resistor and a strong starting circuit, wherein the strong starting circuit is used for strongly starting the controlled equipment when the control module is started, and the driving resistor is used for maintaining the controlled equipment to act when the control module is stable.
Through setting up of the strong start module, can force to start about 20ms when the power on initial stage, the voltage is lower, and strong start module can also self-closing strong start action simultaneously, after 20ms time, keep controlled equipment work through the drive resistor.
Referring to fig. 2, which is a connection block diagram of the two-wire multi-wire control and detection circuit of the present utility model, it is obvious from fig. 2 that the present utility model is composed of a central control detection module, a control module, a forced starting module, a maintenance driving resistor (i.e. a driving resistor which is a part of the forced starting module), an excitation module, a detection module, etc., and the working principle thereof is as follows:
before the control module is started and supplies power, the excitation module provides an excitation signal with an excitation voltage of about 12V, at the moment, the detection module works to start judging the state of a circuit in the two-wire multi-wire control and detection circuit, when the state is detected to be in a normal state, the control module is controlled to start through the central control detection module, the control module supplies power to the controlled equipment after being started, and when the control module is started, the forced starting module firstly performs forced starting on the controlled equipment, and after about 20ms, the forced starting module is switched to the driving resistor to maintain the controlled equipment to keep acting.
Referring to fig. 1, a control module according to the present utility model includes: transistor Q1, transistor Q2, resistor R3, resistor R4;
the collector of the triode Q2 is sequentially connected with a resistor R2 and a resistor R4 in series and then connected to a 24V power supply, the emitter is grounded, and the base is connected with a resistor R3 in series and then connected to a central control detection module;
the emitter of the triode Q1 is connected to a 24V power supply, the collector is connected to a controlled device, and the base is connected between a resistor R2 and a resistor R4.
In fig. 1, the P1 interface is an output port of the central control detection module, and the FC1 interface is an input port of the controlled device. The working principle of the control module is that power is supplied through a 24V power supply, when the central control detection module outputs a high level, the triode Q2 is conducted, so that a path of the power supply, the resistor R2, the resistor R4 and the triode Q2 is electrified, the base electrode of the triode Q1 is electrified, the triode Q1 is conducted, and the 24V power supply can supply power to controlled equipment through the collector electrode of the triode Q1 after the power supply is conducted, so that a power supply procedure is completed.
Referring to fig. 1, the excitation module according to the present utility model includes: a resistor R1 and a diode D1;
the positive electrode of the diode D1 is connected to a 12V power supply, and the negative electrode of the diode D1 is connected between the control module and controlled equipment after being connected with the resistor R1 in series.
Here, the power supply in the excitation module is 12V, and due to the reverse characteristic of the diode D1, the control module can normally output 24V voltage, and then stop outputting the voltage, and meanwhile, the analog value can be read by detecting the driving resistor R7, so as to determine whether the output can be normally started.
Referring to fig. 1, the detection module includes: resistor R8, resistor R9, capacitor C2;
one end of the resistor R8 is connected between the control module and the controlled equipment, the other end of the resistor R8 is connected in series with the resistor R9 and then grounded, and the capacitor C2 is connected in parallel with the two ends of the resistor R9;
the detection module is also provided with a detection pin connected with the central control detection module, and the detection pin is also connected between the resistor R8 and the resistor R9.
The ADC-CHK pin in fig. 1 is a detection pin, and is capable of performing ADC conversion, converting an analog electrical signal into a digital signal, and transmitting the digital signal to the central control detection module, and determining whether the circuit is abnormal according to the voltage.
The specific detection logic is as follows:
before the control module is started, the states of the lines in the two-wire multi-line control and detection circuit comprise a normal state, an open-circuit state and a short-circuit state;
when the voltage detected by the detection pin is lower than the first threshold voltage, the state of the circuit in the two-wire multi-wire control and detection circuit is a short circuit state;
when the voltage detected by the detection pin is higher than the second threshold voltage, the state of the circuit in the two-wire multi-wire control and detection circuit is an open circuit state.
After the control module is started, the detection module is used for detecting whether the controlled equipment is normally connected to work.
In practical application, if the circuit is in a short circuit state, the corresponding first threshold voltage can be set to a smaller value, and the distribution setting can be performed according to the 12V voltage provided by the excitation module and the resistance value of each resistor in the circuit;
similarly, if the circuit is in an open state, the second threshold voltage may be designed to be a larger value, where the specific value needs to be set according to the practical application of the circuit.
After the control module is started, the excitation module stops outputting voltage due to the reverse characteristic of the diode D1, the 24V power supply supplies power to the controlled equipment, and the voltage detected by the detection module is the voltage on the power supply line of the controlled equipment and can be used for judging whether the controlled equipment is normally connected to work.
After setting, the detection pin can judge whether the voltage is lower than a first threshold voltage or higher than a second threshold voltage through detecting the voltage, so as to determine the abnormal state of the circuit or whether the controlled equipment is normally connected to work, and the detection pin is sent to the central control detection module according to the corresponding judgment result, so that whether to execute starting is judged.
In other embodiments of the present utility model, the current may be collected to determine whether the line is in a short-circuit state, a disconnection state, or a normal state, and the working principle is similar to that of the voltage collection method, which is not described herein.
Referring to fig. 2, the strong start module includes a resistor R7 serving as a driving resistor, a resistor R5, a resistor R6, a triode Q3, and a capacitor C1 forming a strong start circuit;
the resistor R7 is connected in series between the control module and the controlled device, one end of the capacitor C1 is connected between the control module and the resistor R7, the other end of the capacitor C1 is sequentially connected with the resistor R5 and the resistor R6 and then connected between the resistor R7 and the controlled device;
the triode Q3 has a collector connected between the capacitor C1 and the resistor R7, an emitter connected between the resistor R6 and the resistor R7, and a base connected between the resistor R5 and the resistor R6.
The working principle is that a certain capacitor is stored through the capacitor C1, when the control module is started, the capacitor C1 can discharge so that the triode Q3 is conducted, and a 24V power supply in the control module can supply power to controlled equipment through the triode Q1 and the triode Q3 at the moment, so that the aim of strong starting is fulfilled. After the capacitor C1 is completely discharged, the triode Q3 is cut off, and the 24V power supply supplies power to the controlled equipment through the triode Q1 and the resistor R7, so that the aim of maintaining the action of the controlled equipment is fulfilled.
The strong starting time is set to be 20ms according to the discharging time of the capacitor C1, and the strong starting time is regulated by the driving resistor and parameters of components in a strong starting circuit;
wherein, the resistance of the resistor R5 is 4.7KΩ, the resistance of the resistor R6 is 100KΩ, the resistance of the resistor R7 is 200Ω, and the capacitance of the capacitor C1 is 4.7uF.
In other embodiments of the present utility model, in order to adjust the time of the strong start, the resistance values of the resistor R5, the resistor R6, the resistor R7, and the capacitance value of the capacitor C1 may be adjusted, and the specific values thereof are not limited, so as to adapt to the use requirement of the controlled device.
The utility model also provides a fire alarm controller which is provided with the two-wire multi-wire control and detection circuit.
Compared with the prior art, the control module, the forced starting module, the excitation module, the detection module and the central control detection module are arranged, the control, power supply and detection circuits share the same group of cables, and the construction cost and the material cost of the cables are reduced.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. A two-wire multi-wire control and detection circuit, comprising:
the control module is connected with the controlled equipment and provided with a power supply for driving the controlled equipment to work;
the excitation module is connected between the control module and the controlled equipment and used for providing an excitation signal;
the detection module is connected between the control module and the controlled equipment and is used for detecting whether the state of a circuit in the two-wire multi-wire control and detection circuit is abnormal after the excitation module provides the excitation signal;
the central control detection module is connected with the control module and the detection module and is used for starting the control module when the state of a circuit in the two-wire multi-wire control and detection circuit is normal.
2. The two-wire multi-wire control and detection circuit of claim 1, further comprising:
the strong starting module is connected between the control module and the controlled equipment and provided with a driving resistor and a strong starting circuit, the strong starting circuit is used for strongly starting the controlled equipment when the control module is started, and the driving resistor is used for maintaining the controlled equipment to act when the control module is stable.
3. The two-wire multi-wire control and detection circuit of claim 1, wherein the control module comprises: transistor Q1, transistor Q2, resistor R3, resistor R4;
the collector of the triode Q2 is sequentially connected with the resistor R2 and the resistor R4 in series and then connected to a 24V power supply, the emitter is grounded, and the base is connected with the resistor R3 in series and then connected to the central control detection module;
the emitter of the triode Q1 is connected to a 24V power supply, the collector is connected to the controlled device, and the base is connected between the resistor R2 and the resistor R4.
4. The two-wire multi-wire control and detection circuit of claim 1, wherein the excitation module comprises: a resistor R1 and a diode D1;
the positive electrode of the diode D1 is connected to a 12V power supply, the negative electrode of the diode D1 is connected in series with the resistor R1, and then the diode D1 is connected between the control module and the controlled equipment.
5. The two-wire multi-wire control and detection circuit of claim 1, wherein the detection module comprises: resistor R8, resistor R9, capacitor C2;
one end of the resistor R8 is connected between the control module and the controlled equipment, the other end of the resistor R9 is connected in series and then grounded, and the capacitor C2 is connected in parallel with two ends of the resistor R9;
the detection module is also provided with a detection pin connected with the central control detection module, and the detection pin is also connected between the resistor R8 and the resistor R9.
6. The two-wire multi-wire control and detection circuit of claim 5, wherein the detection module is configured to detect a state of a wire in the two-wire multi-wire control and detection circuit prior to the control module being activated;
and when the voltage detected by the detection pin is lower than a first threshold voltage, the two wires
The state of the circuit in the multi-wire control and detection circuit is a short circuit state;
when the voltage detected by the detection pin is higher than a second threshold voltage, the state of the circuit in the two-wire multi-wire control and detection circuit is an open-circuit state;
after the control module is started, the detection module is used for detecting whether the controlled equipment normally accesses to work.
7. The two-wire multi-wire control and detection circuit according to claim 2, wherein the strong start module comprises a resistor R7 serving as the driving resistor, and a resistor R5, a resistor R6, a triode Q3 and a capacitor C1 which form the strong start circuit;
the resistor R7 is connected in series between the control module and the controlled device, one end of the capacitor C1 is connected between the control module and the resistor R7, and the other end of the capacitor C1 is connected between the resistor R7 and the controlled device after being sequentially connected with the resistor R5 and the resistor R6;
the collector of the triode Q3 is connected between the capacitor C1 and the resistor R7, the emitter is connected between the resistor R6 and the resistor R7, and the base is connected between the resistor R5 and the resistor R6.
8. The two-wire multi-wire control and detection circuit of claim 7, wherein the strong start time of the strong start module is 20ms, and the strong start time is adjusted by the driving resistor and component parameters in the strong start circuit;
wherein, the resistance of the resistor R5 is 4.7KΩ, the resistance of the resistor R6 is 100KΩ, the resistance of the resistor R7 is 200 Ω, and the capacitance of the capacitor C1 is 4.7uF.
9. The two-wire multi-wire control and detection circuit of claim 1 wherein the control module is enabled when the central control detection module issues a high level signal;
when the central control detection module sends out a low level, the control module is closed.
10. A fire alarm controller having a two-wire multi-wire control and detection circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322206781.7U CN220491204U (en) | 2023-08-16 | 2023-08-16 | Two-wire system multi-wire control and detection circuit and fire alarm controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322206781.7U CN220491204U (en) | 2023-08-16 | 2023-08-16 | Two-wire system multi-wire control and detection circuit and fire alarm controller |
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| Publication Number | Publication Date |
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| CN220491204U true CN220491204U (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322206781.7U Active CN220491204U (en) | 2023-08-16 | 2023-08-16 | Two-wire system multi-wire control and detection circuit and fire alarm controller |
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| Country | Link |
|---|---|
| CN (1) | CN220491204U (en) |
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- 2023-08-16 CN CN202322206781.7U patent/CN220491204U/en active Active
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