Fire prevention and control system

Abstract

The utility model discloses a fire prevention and control system which comprises a power supply module and a control module. The power supply module comprises a power supply control unit, a voltage conversion unit, a voltage output unit, a first switch and a second switch. The first switch is used for controlling connection and disconnection between the storage battery and the voltage conversion unit, and the second switch is used for controlling connection and disconnection between the second input voltage and the voltage conversion unit. The voltage conversion unit is used for converting a first input voltage, a second input voltage or a storage battery voltage into a first power supply voltage and a second power supply voltage, and controlling the connection and disconnection between the first input voltage and the second end of the first switch based on a second control signal. And on-off between the second power supply voltage and the voltage output unit is controlled based on the first control signal. The voltage output unit controls connection and disconnection between the second power supply voltage and the control module based on the third control signal. According to the fire prevention and control system, the stable power supply module is designed, so that the system can still work normally when the main power supply fails.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of alarm system, and specifically relates to a fire prevention and control system. BACKGROUND

[0002] The marine fire prevention and control system is a device for monitoring the fire inside the ship, which can timely discover the fire and provide accurate alarm information, so as to guarantee the life and property safety of the crew.

[0003] The marine fire prevention and control system mainly consists of a fire monitoring part, a control center and an alarm and the like. The fire monitoring part mainly comprises various detectors, which constantly monitor the parameters such as the gas and temperature inside the ship, and automatically triggers the alarm mechanism and timely sends the alarm information to the control center once the abnormal condition is found. The control center is the core part of the whole alarm system, which judges and analyzes the data uploaded by the detectors, and sends the alarm signal and controls other devices to start the fire extinguishing system and other emergency measures when the fire inside the ship is found. The alarm is the output end of the fire prevention and control system, which triggers the alarm to send the sound and light signals and reminds the crew to timely deal with the situation when the control center determines that the fire occurs.

[0004] For the fire prevention and control system, the power supply is the key to the normal operation. However, the power supply of the existing fire prevention and control system still has problems such as standby power failure and insufficient power supply stability, which will be very dangerous when the main power supply is lost.

[0005] The information disclosed in this background section is intended only to increase an understanding of the general background of the present utility model and should not be construed as admitting that the information constitutes prior art with respect to the present utility model in any form. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing a fire prevention and control system, which can provide various standby power supplies.

[0007] In order to achieve the above-mentioned purpose, the technical scheme provided by the utility model in one specific embodiment is as follows:

[0008] A fire prevention and control system comprises a power module and a control module; the power module comprises a power control unit, a voltage conversion unit, a voltage output unit, a first switch and a second switch; a first end of the first switch is connected with a storage battery, a second end of the first switch is connected with the voltage conversion unit, the first switch is used for controlling the on-off between the storage battery and the voltage conversion unit, a first end of the second switch is connected with a second input voltage, a second end of the second switch is connected with the voltage conversion unit, the second switch is used for controlling the on-off between the second input voltage and the voltage conversion unit; the voltage conversion unit is also connected with a first input voltage, the voltage conversion unit is used for converting the first input voltage, the second input voltage or the storage battery voltage into a first power voltage and a second power voltage, the power control unit is connected with the voltage conversion unit to receive the first power voltage and generate a first control signal and a second control signal, the voltage conversion unit controls the on-off between the first input voltage and the second end of the first switch based on the second control signal, the voltage conversion unit is also connected with the voltage output unit to control the on-off between the second power voltage and the voltage output unit based on the first control signal; the power control unit is connected with the voltage output unit to generate a third control signal, the voltage output unit is connected with the control module to control the on-off between the second power voltage and the control module based on the third control signal; the control module comprises a master control unit, a first communication unit and an alarm unit, the master control unit is connected with external equipment through the first communication unit to communicate with the external equipment and obtain alarm information, the alarm unit is connected with the master control unit to alarm based on the control of the master control unit.

[0009] In one or more embodiments of the utility model, the voltage conversion unit comprises a first conversion unit, a second conversion unit and a first switch unit, the first conversion unit is connected with the first input voltage, the second end of the first switch and the second end of the second switch, and the first conversion unit is used for converting the first input voltage, the second input voltage or the storage battery voltage into the first power voltage; the second conversion unit is connected with the first input voltage, the second end of the first switch and the second end of the second switch, and the second conversion unit is used for converting the first input voltage, the second input voltage or the storage battery voltage into the second power voltage, the second conversion unit is connected with the power control unit and the voltage output unit to control the on-off between the second power voltage and the voltage output unit based on the first control signal; the first switch unit is connected with the first input voltage, the second end of the first switch and the power control unit, and the first switch unit is used for controlling the on-off between the first input voltage and the second end of the first switch based on the second control signal.

[0010] In one or more embodiments of the utility model, the second conversion unit includes first conversion subunit, second conversion subunit, third conversion subunit and second switch unit, the input of first conversion subunit is connected with first input voltage, the output of first conversion subunit is used to produce second power voltage, the input of second conversion subunit is connected with the second end of second switch, the output of second conversion subunit is used to produce second power voltage, the input of third conversion subunit is connected with the second end of first switch, the output of third conversion subunit is used to produce second power voltage, second switch unit is connected with the output of first conversion subunit, the output of second conversion subunit, the output of third conversion subunit to receive second power voltage, second switch unit is connected with power control unit and voltage output unit to control the on-off between second power voltage and voltage output unit based on first control signal.

[0011] In one or more embodiments of the utility model, the voltage conversion unit further includes third switch unit, the power control unit is further used to produce fourth control signal, the third switch unit is connected with power control unit, the second end of first switch and first conversion unit to control the on-off between the second end of first switch and first conversion unit based on fourth control signal.

[0012] In one or more embodiments of the utility model, the power module further includes second communication unit, the second communication unit is connected with power control unit and external equipment to control the communication between power control unit and external equipment.

[0013] In one or more embodiments of the utility model, the power module further includes sampling unit, the sampling unit is connected with voltage conversion unit and power control unit, and the sampling unit is used to sample second power voltage to produce sampling signal and deliver sampling signal to power control unit.

[0014] In one or more embodiments of the utility model, the power module further includes acousto-optic unit, the acousto-optic unit is connected with power control unit to carry out acousto-optic alarm based on the control of power control unit.

[0015] In one or more embodiments of the utility model, the control module further includes storage unit, the storage unit is connected with main control unit to store data.

[0016] In one or more embodiments of the utility model, the control module further includes key input unit, the key input unit is connected with main control unit to produce input signal based on key state.

[0017] In one or more embodiments of the utility model, the control module further includes a relay unit, the relay unit is connected with the master control unit and external fire extinguishing equipment, the relay unit generates fire extinguishing signal for controlling the external fire extinguishing equipment to extinguish fire based on the control of the master control unit.

[0018] Compared with the prior art, the fire prevention and control system of the utility model designs stable power module, provides the functions of main power supply, emergency power supply and standby power supply through first input voltage, second input voltage and battery respectively, ensures that the system can still work normally when the main power supply fails. The first input voltage can charge the battery by controlling the battery and the first input voltage to be connected through the power control unit, so that the battery can be charged in non-emergency state to ensure sufficient power. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0020] Figure 1 It is the structural diagram of fire prevention and control system in an embodiment of the utility model.

[0021] Figure 2 It is the circuit principle diagram of voltage conversion unit and sampling unit in an embodiment of the utility model.

[0022] Figure 3 It is the circuit principle diagram of voltage output unit in an embodiment of the utility model.

[0023] Figure 4 It is the circuit principle diagram of power control unit in an embodiment of the utility model.

[0024] Figure 5 It is the circuit principle diagram of sound and light unit in an embodiment of the utility model.

[0025] Figure 6 It is the circuit principle diagram of second communication unit in an embodiment of the utility model.

[0026] Figure 7 It is the circuit principle diagram of power supply circuit in an embodiment of the utility model.

[0027] Figure 8 It is the circuit principle diagram of key input unit in an embodiment of the utility model.

[0028] Figure 9The circuit principle drawing of the main control unit in an embodiment of the utility model.

[0029] Figure 10 The circuit principle drawing of the storage unit in an embodiment of the utility model.

[0030] Figure 11 The circuit principle drawing of the first communication unit in an embodiment of the utility model.

[0031] Figure 12 The circuit principle drawing of the liquid crystal display unit in an embodiment of the utility model.

[0032] Figure 13 The circuit principle drawing of the LED unit in an embodiment of the utility model.

[0033] Figure 14 The circuit principle drawing of the voice unit in an embodiment of the utility model.

[0034] Figure 15 The circuit principle drawing of the relay unit in an embodiment of the utility model. DETAILED DESCRIPTION

[0035] In order to make the personnel in the art better understand the technical scheme in the utility model, the technical scheme in the embodiment of the utility model will be described clearly and completely in the following with reference to the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, but not all the embodiments. Based on the embodiment in the utility model, all the other embodiments obtained by the person skilled in the art without making the creative labor should belong to the protection scope of the utility model.

[0036] The "coupling" or "connection" or "connection" in the specification includes both direct connection and indirect connection. The indirect connection is the connection through the intermediate medium, such as the connection through the electrically conductive medium, which can have parasitic inductance or parasitic capacitance; the indirect connection can also include the connection through other active devices or passive devices on the basis of achieving the same or similar functional purposes, such as the connection through the circuit or components such as switches, follower circuits, etc. In addition, in the specification, for example, the words "first", "second" and the like are mainly used to distinguish one technical feature from another technical feature, and do not necessarily require or imply that there is a certain actual relationship, quantity or order between the technical features.

[0037] In the detailed description of the specification, reference is made to the accompanying drawings, which form a part of the specification, in which like numerals refer to like parts throughout the several views, and in which by way of illustration, example embodiments that can be implemented can be shown. It is to be understood that other embodiments can be utilized, and structural or logical changes can be made, without departing from the scope of the present disclosure. Therefore, the following detailed description is not to be taken in a limiting sense.

[0038] Various operations can be described as multiple discrete actions or operations in a manner that is most helpful in understanding the claimed subject matter. However, the order of description should not be construed as to imply that these operations are necessarily order-dependent. Specifically, these operations can not be performed in the order of presentation. Operations described can be performed in a different order than the described embodiment. Various additional operations can be performed and / or described operations can be omitted in additional embodiments.

[0039] For purposes of the present disclosure, the phrase "A and / or B" means (A), (B), or (A and B). For purposes of the present disclosure, the phrase "A, B, and / or C" means (A), (B), (C), (A and B), (A and C), (B and C), or (A, B and C).

[0040] Various components, devices, etc. can be referred to herein in the singular or plural throughout the discussion, e.g., "MOS transistor", "transistor", "switch", etc. This is simply for ease of discussion and any element referred to in the singular can include a plurality of such elements in accordance with the teachings herein.

[0041] The specification describes using the phrases "in one embodiment" or "in other embodiments" or "in some embodiments", which can each refer to one or more of the same or different embodiments. Furthermore, the terms "comprising", "including", "having" and the like, as used with respect to embodiments of the present disclosure, are synonymous.

[0042] As Figure 1 The fire prevention and control system in an embodiment of the present application comprises a power module 10 and a control module 20.

[0043] The power module 10 comprises a power control unit 11, a voltage conversion unit 12, a voltage output unit 13, a second communication unit 14, a sampling unit 15, an audible and light unit 16, a first switch S1 and a second switch S2.

[0044] The first end of the first switch S1 is connected with the battery BD, the second end of the first switch S1 is connected with the voltage conversion unit 12, and the first switch S1 is used to control the on-off between the battery BD and the voltage conversion unit 12. The first end of the second switch S2 is connected with the second input voltage YJ, the second end of the second switch S2 is connected with the voltage conversion unit 12, and the second switch S2 is used to control the on-off between the second input voltage YJ and the voltage conversion unit 12.

[0045] The voltage conversion unit 12 is also connected with the first input voltage MA, and the voltage conversion unit 12 is used to convert the first input voltage MA, the second input voltage YJ or the battery voltage into the first power voltage VCC and the second power voltage.

[0046] The power control unit 11 is connected with the voltage conversion unit 12 to receive the first power voltage VCC and generate the first control signal CON1 and the second control signal CON2. The voltage conversion unit 12 controls the on-off between the first input voltage MA and the second end of the first switch S1 based on the second control signal CON2, and the voltage conversion unit 12 is also connected with the voltage output unit 13 to control the on-off between the second power voltage and the voltage output unit 13 based on the first control signal CON1.

[0047] The power control unit 11 is connected with the voltage output unit 13 to generate the third control signal CON3, and the voltage output unit 13 is connected with the control module 20 to control the on-off between the second power voltage and the control module 20 based on the third control signal CON3.

[0048] The second communication unit 14 is connected with the power control unit 11 and the external device to control the communication between the power control unit 11 and the external device.

[0049] The sampling unit 15 is connected with the voltage conversion unit 12 and the power control unit 11, and the sampling unit 15 is used to sample the second power voltage to generate the sampling signal AD1 and transmit the sampling signal AD1 to the power control unit 11.

[0050] The sound and light unit 16 is connected with the power control unit 11 to perform sound and light alarm based on the control of the power control unit 11.

[0051] In an embodiment, the first input voltage MA is the main power voltage, the second input voltage YJ is the emergency voltage, the battery BD provides the standby voltage, and by controlling the first switch S1 and the second switch S2, only the first input voltage MA can be used for power supply under normal circumstances, and when the first input voltage MA fails, the second input voltage YJ or the battery BD is connected for power supply. The first power voltage VCC can be the working voltage required by other units on the power module except the voltage conversion unit 12, and the second power voltage can be the working voltage required by the control module.

[0052] As Figure 2 shown, the voltage conversion unit 12 includes a first conversion unit 121, a second conversion unit and a first switch unit 122.

[0053] The first conversion unit 121 is connected with the power control unit 11, the first input voltage MA, the second end of the first switch S1 and the second end of the second switch S2, and is configured to convert the first input voltage MA, the second input voltage YJ or the battery voltage into the first power voltage VCC.

[0054] The second conversion unit is connected with the first input voltage MA, the second end of the first switch S1 and the second end of the second switch S2, and is configured to convert the first input voltage MA, the second input voltage YJ or the battery voltage into the second power voltage (24V voltage), and is further connected with the power control unit 11 and the voltage output unit 13 to control the on-off between the second power voltage and the voltage output unit 13 based on the first control signal CON1.

[0055] The first switch unit 122 is connected with the first input voltage MA, the second end of the first switch S1 and the power control unit 11, and is configured to control the on-off between the first power voltage VCC and the second end of the first switch S1 based on the second control signal CON2. When the first switch S1 is closed, the first switch unit 122 is further controlled to be closed, so that the battery BD can be charged by the first input voltage MA.

[0056] In an embodiment, the voltage conversion unit 12 further includes a third switch unit 123, and the power control unit 11 is further configured to generate a fourth control signal CON4. The third switch unit 123 is connected with the power control unit 11, the second end of the first switch S1 and the first conversion unit 121 to control the on-off between the second end of the first switch S1 and the first conversion unit 121 based on the fourth control signal CON4.

[0057] The third switch unit 123 includes a MOS tube Q8, a resistor R32 and a resistor R36. The source of the MOS tube Q8, the first end of the resistor R32 are connected with the second end of the first switch S1, the gate of the MOS tube Q8, the second end of the resistor R32 and the first end of the resistor R36 are connected with the power control unit 11 to receive the fourth control signal CON4, and the drain of the MOS tube Q8 is connected with the first conversion unit 121.

[0058] As Figure 2As shown, the first conversion unit 121 comprises a power supply chip U3 and its peripheral circuit. The pin 1 of the power supply chip U3 is connected with the first input voltage MA, the second end of the second switch S2 and the drain of the MOS tube Q8, and the power supply chip U3 is used to convert the first input voltage MA, the second input voltage YJ or the battery voltage into the first power supply voltage VCC and output the first power supply voltage VCC through its pin 3. A diode is further connected between the pin 1 of the power supply chip U3 and the first input voltage MA, the second end of the second switch S2 and the drain of the MOS tube Q8 respectively to prevent the current from flowing back.

[0059] As shown in FIG. 1, the power supply control unit 11 comprises a microprocessor U1 and its peripheral circuit. Figure 2 As shown, the second conversion unit comprises a first conversion sub-unit, a second conversion sub-unit, a third conversion sub-unit and a second switch unit 124.

[0060] The input end of the first conversion sub-unit is connected with the first input voltage MA, and the output end of the first conversion sub-unit is used to generate the second power supply voltage. The input end of the second conversion sub-unit is connected with the second end of the second switch S2, and the output end of the second conversion sub-unit is used to generate the second power supply voltage. The input end of the third conversion sub-unit is connected with the second end of the first switch S1, and the output end of the third conversion sub-unit is used to generate the second power supply voltage.

[0061] The second switch unit 124 is connected with the output end of the first conversion sub-unit, the output end of the second conversion sub-unit and the output end of the third conversion sub-unit to receive the second power supply voltage, and the second switch unit 124 is connected with the power supply control unit 11 and the voltage output unit 13 to control the on-off between the second power supply voltage and the voltage output unit 13 based on the first control signal CON1.

[0062] In an embodiment, the second switch unit 124 is connected with the voltage output unit 13 through the sampling unit 15, and the second switch unit 124 controls the on-off between the second power supply voltage and the sampling unit 15 based on the first control signal CON1, and further controls the on-off between the second power supply voltage and the voltage output unit 13. In other embodiments, the second switch unit 124 can also be directly connected with the voltage output unit 13.

[0063] The first conversion sub-unit comprises a rectifier chip D2, and the model of the rectifier chip D2 is preferably SBT30L45CT. The pin 1 and the pin 3 of the rectifier chip D2 are connected with the first input voltage MA, and the rectifier chip D2 is used to convert the first input voltage MA into the second power supply voltage and output through its pin 2.

[0064] The second conversion subunit comprises a rectifier chip D3, preferably SBT30L45CT, the pin 1 and pin 3 of which are connected to the second end of the second switch S2, and the rectifier chip D3 is used to convert the second input voltage YJ into a second power voltage and output through its own pin.

[0065] The third conversion subunit comprises a rectifier chip D4, preferably SBT30L45CT, the pin 1 and pin 3 of which are connected to the second end of the first switch S1, and the rectifier chip D4 is used to convert the battery voltage into a second power voltage and output through its own pin 2.

[0066] The second switch unit 124 comprises a MOS tube Q12, a resistor R25 and a resistor R26. The source of the MOS tube Q12, the first end of the resistor R25 and the pin 2 of the rectifier chip D2, the pin 2 of the rectifier chip D3 and the pin 2 of the rectifier chip D4 are connected, the gate of the MOS tube Q12 and the second end of the resistor R25 are connected to the first end of the resistor R26, the second end of the resistor R26 is connected to the power control unit 11 to receive the first control signal CON1, and the drain of the MOS tube Q12 is connected to the sampling unit 15.

[0067] As shown in Figure 2 , the first switch unit 122 comprises a MOS tube Q6, a resistor R20, a resistor R23 and a protection circuit.

[0068] The source of the MOS tube Q6 and the first end of the resistor R20 are connected to the first input voltage MA, the gate of the MOS tube Q6 and the second end of the resistor R20 are connected to the first end of the resistor R23, the second end of the resistor R23 is connected to the power control unit 11 to receive the second control signal CON2, and the drain of the MOS tube Q6 is connected to the second end of the first switch S1 through the protection circuit. The protection circuit comprises a resistor R18, a resistor R21, a diode V5 and a diode V6.

[0069] As shown in Figure 2 , the sampling unit 15 comprises a coupling inductor L1, a grounding resistor R27, a grounding resistor R29, a grounding resistor R30, a protection circuit and a follow-up circuit, wherein the protection circuit comprises a filter capacitor C12, a diode V9 and a self-resetting fuse V8.

[0070] Pin 1 of the coupling inductor L1 is connected to ground voltage through grounding resistors R27, R29, and R30. Pin 1 of the coupling inductor L1 is also connected to the follower circuit to generate the initial sampling signal ADC. Pin 3 of the coupling inductor L1 is connected to the drain of the MOSFET Q12. Pin 4 of the coupling inductor L1 is connected to the voltage output unit 13 to output the second power supply voltage. Pin 2 of the coupling inductor L1 is connected to the reference voltage (ground voltage) of the second power supply voltage. The filter capacitor C12, diode V9, and resettable fuse V8 are connected in parallel between pin 2 and pin 1 of the coupling inductor L1.

[0071] There is an inductance between pin 3 and pin 4 of the coupled inductor L1, and another inductance between pin 1 and pin 2 of the coupled inductor L1. The two inductors are coupled together.

[0072] When the second power supply voltage fluctuates, the coupling inductor L1 can sense this fluctuation and output it through the sampling initial signal ADC.

[0073] The follower circuit includes amplifier U2A, resistors R12, R9, R5, and R6, as well as filter capacitors C6 to C8 and Zener diode V2.

[0074] The first end of resistor R12 is connected to pin 1 of coupled inductor L1 to receive the initial sampling signal ADC. The second end of resistor R12 is connected to the first input terminal of amplifier U2A. The output terminal of amplifier U2A is connected to the first ends of resistor R5 and resistor R9. The second ends of resistor R5 and the first ends of resistor R6 are connected to the second input terminal of amplifier U2A. The second end of resistor R6 is connected to ground voltage. The second end of resistor R9 is connected to power control unit 11 to generate sampling signal AD1.

[0075] like Figure 3 As shown, the voltage output unit 13 includes a MOSFET Q9, resistors R41 and R42, and an inductor L3. The source of the MOSFET Q9 and the first terminal of resistor R41 are connected to pin 4 of the coupling inductor L1. The gate of the MOSFET Q9 and the second terminal of resistor R41 are connected to the first terminal of resistor R42. The second terminal of resistor R42 is connected to the power control unit 11 to receive the third control signal CON3. The drain of the MOSFET Q9 is connected to the control module 20.

[0076] like Figure 4 As shown, the power control unit 11 includes a power chip U1.

[0077] In one embodiment, the power control unit 11 further includes a comparison circuit 111. The comparison circuit 111 is used to compare the ground voltage of the control module 20 with a reference voltage to generate a comparison signal OVER. The power chip U1 is also connected to the comparison circuit 111 to receive the comparison signal OVER.

[0078] The ground voltage of the control module 20 and the ground voltage of the power module 10 are theoretically the same, but there can be a voltage difference in practice. In the figure, the ground voltage on the power module 10 is marked as GND for convenience of distinction, and the ground voltage on the control module 20 is marked as G. For other units, the unit devices on the power module 10 are connected to the ground voltage on the power module 10, and the unit devices on the control module 20 are connected to the ground voltage on the control module 20.

[0079] The comparison circuit 111 includes a comparator U4B, a resistor R43, a resistor R47, a resistor R44, a resistor R48, a capacitor C19, and an inductor L5. The first end of the resistor R43 is connected to the first power supply voltage VCC, the second end of the resistor R43 and the first end of the resistor R47 are connected to the first input end of the comparator U4B, the second end of the resistor R47 is connected to the ground voltage of the power module 10, and the resistor R43 and the resistor R47 divide the first power supply voltage VCC to form a reference voltage.

[0080] The second input end of the comparator U4B is connected to the ground voltage of the power module 10 through the capacitor C19, connected to the ground voltage of the power module 10 through the resistor R48, and connected to the ground voltage of the control module 20 through the inductor L5. The output end of the comparator U4B is connected to the first end of the resistor R44 to generate a comparison signal OVER, and the second end of the resistor R44 is connected to the first power supply voltage VCC.

[0081] In an embodiment, when the ground voltage of the control module 20 is greater than the reference voltage, the comparison circuit 111 generates a high-level comparison signal OVER, and vice versa.

[0082] In an embodiment, the power control unit 11 further includes a first power supply sampling circuit 112, a second power supply sampling circuit 113, and a third power supply sampling circuit 114.

[0083] The first power supply sampling circuit 112 is connected to the first input voltage MA to sample the first input voltage MA and generate a first voltage sampling signal M-POW. The first power supply sampling circuit 112 includes a resistor R19, a resistor R22, a resistor R24, and a capacitor C11. The first end of the resistor R19 is connected to the first input voltage MA, the second end of the resistor R19, the first end of the resistor R22, and the first end of the resistor R24 are connected, the second end of the resistor R24 and the first end of the capacitor C11 are connected to the ground voltage, and the second end of the resistor R22 and the second end of the capacitor C11 generate the first voltage sampling signal M-POW.

[0084] The second power sampling circuit 113 is connected to the second terminal of the second switch S2 to sample the second input voltage YJ and generate a second voltage sampling signal YJ-POW. The third power sampling circuit 114 is connected to the drain of the MOSFET Q8 to sample the battery voltage BD and generate a third voltage sampling signal B-POW. The specific structure and working principle of the second power sampling circuit 113 and the third power sampling circuit 114 are similar to those of the first power sampling circuit 112, and will not be described again here.

[0085] like Figure 4 As shown, the power control unit 11 includes a power chip U1. The power chip U1 is preferably an STC15W4K32S4. Pin 1 of the power chip U1 is connected to the first power sampling circuit 112 to receive the first voltage sampling signal M-POW; pin 5 of the power chip U1 is connected to the second power sampling circuit 113 to receive the second voltage sampling signal YJ-POW; and pin 4 of the power chip U1 is connected to the third power sampling circuit 114 to receive the third voltage sampling signal B-POW.

[0086] Pin 2 of power chip U1 is connected to the output of comparator U4B in comparator circuit 111 to receive the comparison signal OVER. Pin 8 of power chip U1 is connected to the second terminal of resistor R9 in sampling unit 15 to receive the sampling signal AD1.

[0087] Pin 3 of the power chip U1 is connected to the second end of resistor R26 in the second switching unit 124 to generate the first control signal CON1.

[0088] Pin 6 of the power chip U1 is connected to the second end of resistor R23 in the first switching unit 122 to generate the second control signal CON2.

[0089] Pin 26 of the power chip U1 is connected to the second end of resistor R42 in voltage output unit 13 to generate a third control signal CON3.

[0090] Pin 25 of the power chip U1 is connected to the second end of resistor R36 in the third switching unit 123 to generate the fourth control signal CON4.

[0091] Pins 30 to 32 of the power chip U1 are connected to the second communication unit 14 to communicate with external devices through the second communication unit 14.

[0092] Pin 11 of the power chip U1 is connected to the acoustic-optical unit 16 to generate a first light-emitting signal for controlling the acoustic-optical unit 16 to emit light. Pin 7 of the power chip U1 is connected to the acoustic-optical unit 16 to generate a first sound-emitting signal for controlling the acoustic-optical unit 16 to emit sound.

[0093] like Figure 5As shown, the audio-visual unit 16 includes a light-emitting diode (LED) D1, a speaker B1, and its peripheral circuitry. The anode of LED D1 is connected to the first power supply voltage VCC, and the cathode of LED D1 is connected to pin 11 of the power chip U1 via a current-limiting resistor R15 to emit light based on a first light-emitting signal. The first terminal of speaker B1 is connected to the first power supply voltage VCC, and the second terminal of speaker B1 is connected to ground via a transistor Q1. The base of transistor Q1 is connected to pin 7 of the power chip U1 to control speaker B1 to emit sound based on a first sound-emitting signal.

[0094] like Figure 6 As shown, the second communication unit 14 includes a communication chip U5 and its peripheral circuitry. Pins 1 to 4 of the communication chip U5 are connected to pins 30 to 32 of the power chip U1, respectively. The communication chip U5 is connected to external devices through the peripheral circuitry to enable 485 protocol communication between the power chip U1 and the external devices.

[0095] like Figure 1 As shown, the control module 20 includes a main control unit 21, a first communication unit 22, an alarm unit 23, a storage unit 24, a key input unit 25, and a relay unit 26.

[0096] The main control unit 21 is connected to external devices through the first communication unit 22 to communicate with external devices and obtain alarm information. The alarm unit 23 is connected to the main control unit 21 to perform alarm based on the control of the main control unit 21.

[0097] The relay unit 26 is connected to the main control unit 21 and the external fire extinguishing equipment. The relay unit 26 generates a fire extinguishing signal based on the control of the main control unit 21 to control the external fire extinguishing equipment to extinguish the fire.

[0098] Storage unit 24 is connected to main control unit 21 to store data. Key input unit 25 is connected to main control unit 21 to generate input signals based on key states.

[0099] like Figure 7 As shown, in one embodiment, the control module 20 further includes a power supply circuit. The power supply circuit is connected to the voltage output unit 13 in the power supply module 10 to receive a second power supply voltage (24V) and convert the second power supply voltage into the operating voltage required by other units in the control module 20. The power supply circuit includes a power chip U14, a power chip U13, and their peripheral circuits. The power chip U14 is used to convert the second power supply voltage into a chip power supply voltage VCC2, and the power chip U13 is used to convert the chip power supply voltage VCC2 into a 3.3V operating voltage.

[0100] like Figure 8As shown, the key input unit 25 includes a plurality of key switches (SW1-SW6), a plurality of voltage dividing resistors (R40-R45) and a voltage stabilizing filter circuit. The voltage stabilizing filter circuit includes a resistor R69, a resistor R68 and a capacitor C38.

[0101] The plurality of voltage dividing resistors are connected in series between the chip power supply voltage VCC2 and the ground voltage, and the voltage dividing resistors form a plurality of voltage dividing nodes by dividing the chip power supply voltage VCC2 and the ground voltage. One end of each key switch is connected to a corresponding voltage dividing node, and the other end of each key switch is connected to the main control unit 21 through the voltage stabilizing filter circuit to generate an input signal.

[0102] In one embodiment, the key input unit 25 is provided with two key input units, which are respectively used to generate the input signal KEYC1 and the input signal KEYC2.

[0103] As shown, Figure 9 the main control unit 21 includes a main control chip U19. The model of the main control chip U19 is preferably IAP15W4K61S4.

[0104] The pin 16 and the pin 17 of the main control chip U19 are respectively connected to one key input unit 25 to receive the input signal KEYC1 and the input signal KEYC2.

[0105] The pins 2-4, the pins 37-40, the pins 45-56 and the pins 59-63 of the main control chip U19 are connected to the storage unit 24 to transmit data to the storage unit 24.

[0106] The pins 32-33, the pins 34-36 of the main control chip U19 are connected to the first communication unit 22.

[0107] The pins 9-15, the pin 29 and the pin 11 of the main control chip U19 are connected to the alarm unit 23.

[0108] The pins 27-28 of the main control chip U19 are connected to the relay unit 26.

[0109] As shown, Figure 10 the storage unit 24 includes a storage chip U17. The model of the storage chip U17 is preferably IS61C1024AL, and a plurality of pins of the storage chip U17 are connected to the main control chip U19 to receive data to be stored.

[0110] As shown, Figure 11 the first communication unit 22 includes a USB unit and a 485 unit.

[0111] The USB unit comprises a USB chip U16 and its peripheral circuit, the pin 5 and the pin 6 of the USB chip U16 are connected with the pin 32-33 of the main control chip U19, and the USB chip U16 is used for controlling the USB communication between the main control chip U19 and the external device.

[0112] The 485 unit comprises a 485 communication chip U11 and its peripheral circuit, the pin 1-pin 4 of the 485 communication chip U11 are connected with the pin 34-36 of the main control chip U19, and the 485 communication chip U11 is used for controlling the 485 protocol communication between the main control chip U19 and the external device.

[0113] As shown in Figures 12 to 14 , the alarm unit 23 comprises a liquid crystal display unit, an LED unit and a voice unit.

[0114] As shown in Figure 12 , the liquid crystal display unit comprises a liquid crystal display (not shown in the figure) and a buffer chip U15. The pin 3, the pin 6, the pin 11 and the pin 8 of the buffer chip U15 are connected with the pin 9-pin 15 of the main control chip U19, and the main control chip U19 is connected with the liquid crystal display through the buffer chip U15 to control the liquid crystal display to display, thereby displaying the alarm content.

[0115] As shown in Figure 13 , the LED unit comprises an LED chip U21 and multiple groups of light emitting diodes. The pin 19 of the LED chip U21 is connected with the pin 11 of the main control chip U19, and the LED chip U21 outputs multiple LED control signals from the pin 1-pin 11, the pin 29-pin 32 based on the control of the main control chip U19. The anode of the light emitting diode is connected with the chip power supply voltage VCC2, and the cathode of the light emitting diode is connected with the pin 1-pin 11, the pin 29-pin 32 of the LED chip U21 through a current-limiting resistor to emit light based on the control of the LED control signal.

[0116] As shown in Figure 14 , the voice unit comprises a voice chip U20 and a sound (not shown in the figure). The pin 3 of the voice chip U20 is connected with the pin 29 of the main control chip U19 through a current-limiting resistor, the pin 4 and the pin 5 of the voice chip U20 are connected with the sound, and the main control chip U19 controls the sound to issue an alarm through the voice chip U20.

[0117] As shown in Figure 15 , the relay unit 26 comprises a relay control chip U31, a signal conversion chip U33 and multiple relays.

[0118] The pin 13 and the pin 14 of the relay control chip U31 are connected with the pin 27 and the pin 28 of the main control chip U19 respectively, and the relay control chip U31 outputs multiple relay control signals through the pin 1 to the pin 6 based on the control of the main control chip U19. The pin 2 to the pin 7 of the signal conversion chip U33 are connected with the pin 1 to the pin 6 of the relay control chip U31 respectively, and the signal conversion chip U33 is used for converting the relay control signals into corresponding relay trigger signals and outputting through the pin 10 to the pin 15.

[0119] The first end of the coil in the relay is connected with the power supply voltage, and the second end is connected with a corresponding one of the pin 10 to the pin 15 of the signal conversion chip U33 respectively, so as to receive the corresponding relay trigger signal. The switch in the relay is connected with the external fire extinguishing equipment, and generates a fire extinguishing signal for controlling the external fire extinguishing equipment to extinguish the fire based on the state of the switch.

[0120] In actual use, the fire prevention and control system in the application can be powered by the first input voltage MA, that is, the main power supply voltage, and can also be powered by the second input voltage YJ (emergency power) and the battery BD (backup power). The staff can actively control whether to connect the second input voltage YJ and the battery BD to the power supply circuit through the first switch S1 and the second switch S2.

[0121] When the first switch S1 is closed and the battery BD is connected to the circuit, the first input voltage MA can also be connected with the battery BD through the first switch unit 122, so as to charge the battery BD. When charging, the third switch unit 123 can also disconnect the connection between the battery BD and the first conversion unit 121, so as to avoid the battery BD discharging the first conversion unit 121 at the same time, causing energy waste and slow charging.

[0122] The sampling unit 15 is arranged to sample the second power supply voltage, and the power supply control unit 11 can also control the second switch unit 124 to adjust the size of the second power supply voltage, issue an abnormal state alarm or take other measures according to the instantaneous change of the second power supply voltage.

[0123] The voltage output unit 13 is arranged, so that the power supply control unit 11 can control the time when the second power supply voltage supplies power to the control module 20. For example, the second switch unit 124 can be controlled to be turned on to supply power to the control module 20 after the power supply control unit 11 completes initialization, so as to avoid the power-on overshoot caused by multiple modules being powered on and initialized at the same time.

[0124] By setting the comparison unit, the first power supply sampling circuit 112, the second power supply sampling circuit 113 and the third power supply sampling circuit 114, the power supply control unit 11 can also obtain whether the ground voltage of the control module 20 exceeds the threshold value, and which power supply is currently powered, the power supply control unit 11 can send these information to the outside through external communication, so that the outside knows the current power supply state, and also can inform the staff through the sound and light unit 16, so that the staff can understand the power supply state in time.

[0125] In addition, the power supply control unit 11 can also adjust the size of the second power supply voltage output to the control module 20 by controlling the voltage output unit 13 based on the ground voltage condition of the control module 20.

[0126] By setting the second communication unit 14, the power supply control unit 11 can send the power supply situation to the outside, and also can be set and controlled by external equipment, such as controlling the power supply control unit 11 to generate the first control signal CON1, the second control signal CON2, the third control signal CON3, the fourth control signal CON4, and modifying the control logic.

[0127] In the control module 20, the main control unit 21 is connected with the external device through the first communication unit 22 to communicate with the external device and obtain the alarm information, and the external device can be various sensors, which senses the fire through the sensor and sends the corresponding signal to the main control unit 21, and controls each unit through the main control unit 21.

[0128] By setting the key input unit 25, the staff can input instructions, configure data, modify parameters, set modules and the like to the main control unit 21.

[0129] By setting the alarm unit 23, the staff can obtain the alarm information through various ways.

[0130] By setting the relay unit 26, the main control unit 21 can actively control the fire extinguishing equipment (such as water mist) according to the fire situation, without the need for manual operation by the staff, which improves the fire response speed.

[0131] For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0132] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A fire prevention and control system, characterized by, The power supply module and the control module are connected through the voltage output unit; The power supply module comprises a power supply control unit, a voltage conversion unit, a voltage output unit, a first switch and a second switch; The first end of the first switch is connected with the battery, the second end of the first switch is connected with the voltage conversion unit, the first switch is used for controlling the on-off between the battery and the voltage conversion unit, the first end of the second switch is connected with the second input voltage, the second end of the second switch is connected with the voltage conversion unit, and the second switch is used for controlling the on-off between the second input voltage and the voltage conversion unit; The voltage conversion unit is also connected with the first input voltage, and the voltage conversion unit is used for converting the first input voltage, the second input voltage or the battery voltage into the first power supply voltage and the second power supply voltage, the power supply control unit is connected with the voltage conversion unit to receive the first power supply voltage and generate the first control signal and the second control signal, the voltage conversion unit controls the on-off between the first input voltage and the second end of the first switch based on the second control signal, and the voltage conversion unit is also connected with the voltage output unit to control the on-off between the second power supply voltage and the voltage output unit based on the first control signal; The power supply control unit is connected with the voltage output unit to generate the third control signal, and the voltage output unit is connected with the control module to control the on-off between the second power supply voltage and the control module based on the third control signal; The control module comprises a master control unit, a first communication unit and an alarm unit, the master control unit is connected with the external device through the first communication unit to communicate with the external device and obtain the alarm information, and the alarm unit is connected with the master control unit to alarm based on the control of the master control unit.

2. The fire prevention system of claim 1, wherein, The voltage conversion unit comprises a first conversion unit, a second conversion unit and a first switch unit, the first conversion unit is connected with the first input voltage, the second end of the first switch and the second end of the second switch, and the first conversion unit is used for converting the first input voltage, the second input voltage or the battery voltage into the first power supply voltage; The second conversion unit is connected with the first input voltage, the second end of the first switch and the second end of the second switch, the second conversion unit is used for converting the first input voltage, the second input voltage or the battery voltage into the second power supply voltage, and the second conversion unit is connected with the power supply control unit and the voltage output unit to control the on-off between the second power supply voltage and the voltage output unit based on the first control signal; The first switch unit is connected with the first input voltage, the second end of the first switch and the power supply control unit, and the first switch unit is used for controlling the on-off between the first input voltage and the second end of the first switch based on the second control signal.

3. The fire prevention system of claim 2, wherein, The second conversion unit comprises a first conversion subunit, a second conversion subunit, a third conversion subunit and a second switch unit; The input end of the first conversion sub-unit is connected with the first input voltage, and the output end of the first conversion sub-unit is used to generate the second power voltage; the input end of the second conversion sub-unit is connected with the second end of the second switch, and the output end of the second conversion sub-unit is used to generate the second power voltage; the input end of the third conversion sub-unit is connected with the second end of the first switch, and the output end of the third conversion sub-unit is used to generate the second power voltage. The second switch unit is connected with the output ends of the first conversion sub-unit, the second conversion sub-unit and the third conversion sub-unit to receive the second power voltage, and the second switch unit is connected with the power control unit and the voltage output unit to control the on-off between the second power voltage and the voltage output unit based on the first control signal.

4. The fire prevention system of claim 2, wherein, The voltage conversion unit further comprises a third switch unit, and the power control unit is further used to generate a fourth control signal; the third switch unit is connected with the power control unit, the second end of the first switch and the first conversion unit to control the on-off between the second end of the first switch and the first conversion unit based on the fourth control signal.

5. The fire prevention system of claim 1, wherein, The power module further comprises a second communication unit, which is connected with the power control unit and an external device to control the communication between the power control unit and the external device.

6. The fire prevention system of claim 1, wherein, The power module further comprises a sampling unit, which is connected with the voltage conversion unit and the power control unit; the sampling unit is used to sample the second power voltage to generate a sampling signal and transmit the sampling signal to the power control unit.

7. The fire prevention system of claim 1, wherein The power module further comprises an audible and visual unit, which is connected with the power control unit to perform audible and visual alarm based on the control of the power control unit.

8. The fire prevention system of claim 1, wherein, The control module further comprises a storage unit, which is connected with the main control unit to store data.

9. The fire prevention system of claim 1, wherein, The control module further comprises a key input unit, which is connected with the main control unit to generate an input signal based on the key state.

10. The fire prevention system of claim 1, wherein, The control module further comprises a relay unit, which is connected with the main control unit and an external fire extinguishing device; the relay unit generates a fire extinguishing signal based on the control of the main control unit to control the external fire extinguishing device to extinguish fire.

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