Terminators and fire equipment control devices

Abstract

The present invention is applicable to the field of fire fighting technology, and in particular, relates to a terminator and a fire fighting equipment control device, wherein the terminator includes a switch control circuit, a switch circuit, a first resistive element and a second resistive element to form the terminator, and the terminator is connected to a manual control panel through a positive input terminal and a negative input terminal of an input port by two wires, thereby reducing wiring costs and wire material costs. At the same time, a voltage drive signal input by the manual control panel can control the energization and attraction of a relay of the fire fighting equipment, thereby controlling the fire fighting equipment to be powered on. After the fire fighting equipment is powered on, the second resistive element is short-circuited, and the switch control circuit controls the switch circuit to be turned on according to the size of the voltage drive signal, thereby changing the resistance value of the output input port. The manual control panel can determine the working state of the fire fighting equipment according to the size of the resistance value, thereby achieving the purpose of monitoring the fire fighting equipment, so as to quickly troubleshoot and repair the fire fighting equipment when it is working abnormally, thereby improving safety.

Description

Technical Field

[0001] The present invention belongs to the technical field of fire fighting, and in particular relates to a terminal and a fire fighting equipment control device. Background Art

[0002] With the improvement of the safety of industrial sites, fire-fighting equipment such as smoke exhaust fans and water pumps are usually remotely controlled through the manual control panel in the fire control room. These fire-fighting equipment can be remotely turned on in an emergency, thereby improving the efficiency of firefighting and rescue.

[0003] Traditional manual control panels are usually three-wire control panels connected to fire-fighting equipment via three wires. The three wires include a start output line, a feedback line, and a common line connecting the start output line and the feedback line. Since the distance between the fire control room and consumer equipment is usually far, the wire cost of the three-wire is high. Summary of the invention

[0004] The object of the present invention is to provide a terminator, aiming to solve the problem of high wire cost of three wires connected between a three-wire control panel and fire-fighting equipment.

[0005] A first aspect of an embodiment of the present invention provides a terminator, the terminator comprising a switch circuit, a switch control circuit, a first resistive element and a second resistive element;

[0006] The input end of the switch circuit is connected to the first signal end of the switch control circuit to form the positive input end of the input port and the positive output end of the output port of the terminator, the second end of the switch circuit is connected to the first end of the first resistive element, the second end of the first resistive element is connected to the first end of the second resistive element to form the positive feedback end of the feedback port of the terminator, the second signal end of the switch control circuit and the second end of the second resistive element are both grounded to form the negative input end of the input port of the terminator, the negative output end of the output port and the negative feedback end of the feedback port, and the control end of the switch control circuit is connected to the controlled end of the switch circuit;

[0007] The input port is used to connect to the power supply terminal of the manual control panel to receive the voltage driving signal output by the manual control panel;

[0008] The output port is used to connect to the relay coil of the fire-fighting equipment, and output the voltage drive signal to the relay coil, so as to control the power-on of the fire-fighting equipment through the relay coil;

[0009] The feedback port is used to be connected to the power supply terminal of the fire-fighting equipment and is short-circuited when the fire-fighting equipment is powered on, so as to short-circuit the second resistive element;

[0010] The switch control circuit is used for:

[0011] Detect the voltage of the voltage drive signal, control the switch circuit to turn off when the voltage of the voltage drive signal is greater than or equal to a preset voltage, and control the switch circuit to turn on when the voltage of the voltage drive signal is less than the preset voltage, so as to change the resistance value of the input port according to the voltage of the voltage drive signal, so that the manual control panel determines the working state of the fire-fighting equipment according to the resistance value of the input port.

[0012] In one embodiment, the switch control circuit includes a voltage sampling module and a voltage comparison module, the first sampling end of the voltage sampling module is the first signal end of the switch control circuit, the second sampling end of the voltage sampling module is the second signal end of the switch control circuit, the signal output end of the voltage sampling module is connected to the signal input end of the voltage comparison module, and the signal output end of the voltage comparison module is the control end of the switch control circuit;

[0013] The voltage sampling module is used to detect the voltage of the voltage driving signal and feed it back to the voltage comparison module;

[0014] The voltage comparison module controls the switch circuit to be turned off when the voltage of the voltage driving signal is greater than or equal to the preset voltage, and controls the switch circuit to be turned on when the voltage of the voltage driving signal is less than the preset voltage, so as to change the resistance value of the input port according to the voltage of the voltage driving signal, so that the manual control panel determines the working state of the fire-fighting equipment according to the resistance value of the input port.

[0015] In one embodiment, the voltage sampling module includes a first resistor, a second resistor and a first capacitor;

[0016] The first end of the first resistor is the first sampling end of the voltage sampling module, the second end of the first resistor, the first end of the second resistor and the first end of the first capacitor are connected together to form a signal output end of the voltage sampling module, and the second end of the second resistor and the second end of the first capacitor are connected to form a second sampling end of the voltage sampling module.

[0017] In one embodiment, the voltage comparison module includes a third resistor and a first electronic switch tube, the first end of the third resistor is connected to the positive input end of the input port, the second end of the third resistor and the input end of the first electronic switch tube are connected together to form the signal output end of the voltage comparison module, the controlled end of the first electronic switch tube is the signal input end of the voltage comparison module, and the output end of the first electronic switch tube is grounded.

[0018] In one embodiment, the switch circuit includes a second electronic switch tube, and the input end, output end and controlled end of the second electronic switch tube are respectively the input end, output end and controlled end of the switch circuit.

[0019] In one embodiment, the first resistive element includes a fourth resistor, and the second resistive element includes a fifth resistor.

[0020] In one embodiment, the terminator further includes an anti-reverse connection circuit, wherein the anti-reverse connection circuit is connected between the input end and the switch circuit;

[0021] The anti-reverse connection circuit is used for unidirectionally outputting the voltage driving signal to the switch circuit.

[0022] In one embodiment, the anti-reverse connection circuit comprises a diode, an anode of the diode is connected to the input end, and a cathode of the diode is connected to the input end of the switch circuit.

[0023] A second aspect of an embodiment of the present invention provides a fire-fighting equipment control device, the fire-fighting equipment control device comprising a power module, a manual control panel and the terminal as described above;

[0024] The output port of the manual control panel is connected to the input port of the terminator, the output port of the terminator is connected to the relay coil of the fire-fighting equipment, the power supply end of the power module is connected to the relay contact of the fire-fighting equipment, and the feedback port of the terminator is connected to the power supply end of the fire-fighting equipment and is short-circuited when the fire-fighting equipment is powered on;

[0025] The power supply module is used to output working power to the relay of the fire-fighting equipment;

[0026] The manual control panel is used to output a first voltage drive signal and a second voltage drive signal to the terminator in a first preset time period and a second preset time period respectively, wherein the voltage of the first voltage drive signal is greater than or equal to the preset voltage, and the voltage of the second voltage drive signal is less than the preset voltage;

[0027] The terminal is used for:

[0028] Outputting the first voltage driving signal and the second voltage driving signal to the relay, and controlling the relay and the fire fighting equipment to be powered on;

[0029] And the resistance value of the input port is changed according to the first voltage driving signal and the second voltage driving signal, so that the manual control panel determines the working state of the fire fighting equipment according to the resistance value of the input port.

[0030] In one embodiment, the manual control panel includes a controller, a sampling circuit and a driving circuit, wherein the controller is electrically connected to the driving circuit and the sampling circuit respectively, and the driving circuit and the sampling circuit are respectively connected to a power supply terminal and a ground terminal of the manual control panel;

[0031] The controller is used to output a control signal to the driving circuit;

[0032] The driving circuit is used to output a first voltage driving signal and a second voltage driving signal to the terminator in a first preset time period and a second preset time period respectively according to the control signal;

[0033] The sampling circuit is used to sample the current at the power supply end and the ground end of the manual control panel, and to feed back the current sampling signal to the controller, so that the controller determines the resistance value of the input port of the terminator and the working status of the fire-fighting equipment according to the current value of the current sampling signal.

[0034] The present invention adopts a switch control circuit, a switch circuit, a first resistive element and a second resistive element to form a terminator. The terminator is connected to a manual control panel through a positive input terminal and a negative input terminal of an input port by two lines, thereby reducing wiring costs and wire material costs. At the same time, a voltage drive signal input by the manual control panel can control the energization and attraction of a relay of the fire-fighting equipment, thereby controlling the power-on of the fire-fighting equipment. After the fire-fighting equipment is powered on, the second resistive element is short-circuited, and the switch control circuit controls the switch circuit to be turned on according to the size of the voltage drive signal, thereby changing the resistance value of the input and output ports. The manual control panel can determine the working state of the fire-fighting equipment according to the size of the resistance value, thereby achieving the purpose of monitoring the fire-fighting equipment, so as to quickly troubleshoot and repair the fire-fighting equipment when it is working abnormally, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the module structure of the first embodiment of the terminal of the present invention;

[0036] Figure 2 A schematic diagram of the module structure of the second embodiment of the terminal of the present invention;

[0037] Figure 3 A schematic diagram of the circuit structure of an embodiment of a terminator of the present invention;

[0038] Figure 4 A schematic diagram of the module structure of an embodiment of a fire-fighting equipment control device of the present invention;

[0039] Figure 5 Schematic diagram of waveforms of the first voltage driving signal and the second voltage driving signal of the present invention;

[0040] Figure 6It is a schematic diagram of the module structure of an embodiment of a manual control panel in a fire-fighting equipment control device of the present invention. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] A first aspect of an embodiment of the present invention provides a terminal 100 .

[0044] like Figure 1 As shown, Figure 1 Schematic diagram of the module structure of the first embodiment of the terminator of the present invention. In this embodiment, the terminator 100 includes a switch circuit 10, a switch control circuit 20, a first resistive element 30 and a second resistive element 40;

[0045] The input end of the switch circuit 10 is connected to the first signal end of the switch control circuit 20 to form the positive input end IN+ of the input port P1 of the terminator 100 and the positive output end OUT+ of the output port P2. The second end of the switch circuit 10 is connected to the first end of the first resistive element 30. The second end of the first resistive element 30 is connected to the first end of the second resistive element 40 to form the positive feedback end RET+ of the feedback port P3 of the terminator 100. The second signal end of the switch control circuit 20 and the second end of the second resistive element 40 are both grounded to form the negative input end IN- of the input port P1 of the terminator 100, the negative output end OUT- of the output port P2 and the negative feedback end RET- of the feedback port P3. The control end of the switch control circuit 20 is connected to the controlled end of the switch circuit 10.

[0046] The input port P1 is used to connect to the power supply terminal of the manual control panel 200 and receive the voltage driving signal output by the manual control panel 200;

[0047] The output port P2 is used to connect to the relay coil of the fire-fighting device 300 and output the voltage driving signal to the relay coil to control the power-on of the fire-fighting device 300 through the relay coil;

[0048] The feedback port P3 is used to be connected to the power supply terminal of the fire-fighting device 300 and is short-circuited when the fire-fighting device 300 is powered on, so as to short-circuit the second resistive element 40;

[0049] The switch control circuit 20 is used for:

[0050] The voltage of the voltage driving signal is detected, and the switch circuit 10 is controlled to be turned off when the voltage of the voltage driving signal is greater than or equal to the preset voltage, and the switch circuit 10 is controlled to be turned on when the voltage of the voltage driving signal is less than the preset voltage, so as to change the resistance value of the input port P1 according to the voltage of the voltage driving signal, so that the manual control panel 200 determines the working state of the fire-fighting equipment 300 according to the resistance value of the input port P1.

[0051] In this embodiment, the terminator 100 is arranged adjacent to the fire-fighting equipment 300. The terminator 100 can be arranged inside the fire-fighting equipment 300 or separately. The input port P1 of the terminator 100 is connected to the manual control panel 200 in the control room through the positive input terminal IN+ and the negative input terminal IN-. The manual control panel 200 only needs to be connected to the terminator 100 through two connecting wires. One less wire is laid from the control room to the on-site equipment, thereby reducing the wire cost and wiring cost.

[0052] The output port P2 is connected to the relay coil of the fire-fighting equipment 300. The relay coil is energized to attract the contact and control the power-on of the fire-fighting equipment 300. The feedback end is connected to the power supply end of the fire-fighting equipment 300 and is used to feedback whether the fire-fighting equipment 300 is powered on normally. When the fire-fighting equipment 300 is powered on normally, the positive feedback end RET+ and the negative feedback end RET- are connected and short-circuited. When the fire-fighting equipment 300 is not powered on normally, the positive feedback end RET+ and the negative feedback end RET- are disconnected. The positive feedback end RET+ can be connected to the first end of the relay contact, and the negative feedback end RET- can be connected to the The second end, the specific connection position is not limited. When the feedback port P3 is short-circuited, the second resistive element 40 is short-circuited. When the switch circuit 10 is turned on, the resistance of the input port P1 is the parallel sum of the resistance of the relay coil and the resistance of the first resistive element 30. When the feedback port P3 is not acted, the second resistive element 40 is not short-circuited. When the voltage driving signal is between the first preset voltage and the second preset voltage, the switch control circuit 20 controls the switch circuit 10 to be turned on, and the resistance of the input port P1 is the parallel sum of the resistance of the relay coil and the first resistive element 30 and the second resistive element 40.

[0053] Assuming that the coil resistance is Rx, the first resistive element 30 resistance is Ri, and the second resistive element 40 resistance is Rj, when the feedback end is in action, the input port P1 resistance is Ri*Rx / (Ri+Rx), and when the feedback end is not in action, the input port P1 resistance is (Ri+Rj)*Rx / (Ri+Rj+Rx). Therefore, the manual control panel 200 can obtain the resistance of the input port P1 by outputting a voltage driving signal and sampling the input port P1 current through the sampling circuit 230, and then judge whether the fire fighting equipment 300 is powered on normally. At the same time, when the input port When P1 is short-circuited, the resistance of the input port P1 is zero. When there is a line break between the terminator 100 and the manual control panel 200, the resistance of the input port P1 is infinite. When there is a line break between the terminator 100 and the relay of the fire-fighting equipment 300, the resistance of the input port P1 is Ri or Ri+Rj. Therefore, when the switch circuit 10 is in the on state, the manual control panel 200 can determine the power-on state of the fire-fighting equipment 300, the connection state of the fire-fighting equipment 300 and the terminator 100, and the connection state of the manual control panel 200 and the terminator 100 according to the resistance of the input port P1.

[0054] When the voltage driving signal output by the manual control panel 200 is greater than the first preset voltage, the switch circuit 10 is turned off, and the input port P1 is disconnected from the first resistive element 30 and the second resistive element 40. When the connection between the terminator 100 and the manual control panel 200 is normal, the resistance of the input port P1 is Rx. When the line between the terminator 100 and the manual control panel 200 is disconnected, the resistance of the input port P1 is infinite. When the line between the terminator 100 and the fire-fighting equipment 300 is disconnected, the resistance of the input port P1 is also infinite. Therefore, when driving and controlling the fire-fighting equipment 300, different voltage driving signals can be output to the terminator 100, and the working state between the manual control panel 200, the terminator 100 and the fire-fighting equipment 300 can be judged according to the resistance of the input port P1 of the terminator 100. Assuming that the switch circuit 10 is turned off when the voltage driving signal is 24V and turned on when it is 9V, and the relay can work normally at both 24V and 9V, as shown in Table 1:

[0055]

[0056] Table 1

[0057] According to Table 1, when the terminator 100 receives voltage driving signals of different sizes, the switch control circuit 20 controls the switch circuit 10 to be turned on and off accordingly, thereby changing the resistance value of the input port P1. The manual control panel 200 can know the mutual and individual working states of the manual control panel 200, the terminator 100 and the fire fighting equipment 300 according to the resistance value of the input port P1.

[0058] Among them, the input port P1, the output port P2 and the feedback port P3 can be structures such as connectors, pins, male / female connectors, etc., and the specific structure is selected according to needs.

[0059] The switch control circuit 20 controls the switch circuit 10 to be turned on according to the magnitude of the voltage driving signal of the input port P1. The switch control circuit 20 may adopt a control chip, a voltage comparison module 22 or other control modules, and no specific limitation is made here. The switch circuit 10 may adopt a switch device with controlled on-off capability, such as a switch tube, a relay, etc. Figure 3 As shown, in one embodiment, the switch circuit 10 includes a second electronic switch tube Q2, and the input end, output end and controlled end of the second electronic switch tube Q2 are the input end, output end and controlled end of the switch circuit 10 respectively.

[0060] The first resistive element 30 and the second resistive element 40 may be resistive elements such as inductors and resistors. Figure 3 As shown, in one embodiment, the first resistive element 30 includes a fourth resistor R4, and the second resistive element 40 includes a fifth resistor R5.

[0061] The present invention adopts a switch control circuit 20, a switch circuit 10, a first resistive element 30 and a second resistive element 40 to form a terminator 100. The terminator 100 is connected to a manual control panel 200 through a positive input terminal IN+ and a negative input terminal IN- of an input port P1 by two lines, thereby reducing the wiring cost and the wire material cost. At the same time, the voltage drive signal input by the manual control panel 200 can control the energization and attraction of the relay of the fire-fighting equipment 300, thereby controlling the power-on of the fire-fighting equipment 300. After the fire-fighting equipment 300 is powered on, the second resistive element 40 is short-circuited, and the switch control circuit 20 controls the switch circuit 10 to be turned on according to the size of the voltage drive signal, thereby changing the resistance value of the input and output port P1. The manual control panel 200 can determine the working state of the fire-fighting equipment 300 according to the size of the resistance value, thereby achieving the purpose of monitoring the fire-fighting equipment 300, so as to quickly troubleshoot and repair the fire-fighting equipment 300 when it works abnormally, thereby improving safety.

[0062] like Figure 2 As shown, in one embodiment, the switch control circuit 20 includes a voltage sampling module 21 and a voltage comparison module 22, the first sampling end of the voltage sampling module 21 is the first signal end of the switch control circuit 20, the second sampling end of the voltage sampling module 21 is the second signal end of the switch control circuit 20, the signal output end of the voltage sampling module 21 is connected to the signal input end of the voltage comparison module 22, and the signal output end of the voltage comparison module 22 is the control end of the switch control circuit 20;

[0063] The voltage sampling module 21 is used to detect the voltage of the voltage driving signal and feed it back to the voltage comparison module 22;

[0064] The voltage comparison module 22 controls the switch circuit 10 to be turned off when the voltage of the voltage driving signal is greater than or equal to the preset voltage, and controls the switch circuit 10 to be turned on when the voltage of the voltage driving signal is less than the preset voltage, so as to change the resistance value of the input port P1 according to the voltage of the voltage driving signal, so that the manual control panel 200 determines the working state of the fire-fighting equipment 300 according to the resistance value of the input port P1.

[0065] In this embodiment, the voltage sampling module 21 can be implemented by using structures such as a voltage transformer and a resistor voltage divider circuit. The voltage comparison module 22 can be implemented by using a comparator and a transistor circuit. The voltage comparison module 22 controls the switch circuit 10 to turn off when it determines that the current voltage driving signal is greater than or equal to the preset voltage, and controls the switch circuit 10 to turn on when the voltage of the voltage driving signal is less than the preset voltage. When switching from on to off or from off to on, the resistance value of the input port P1 also changes accordingly. The manual control panel 200 can determine the working status of the fire-fighting equipment 300 according to the resistance value of the input port P1.

[0066] like Figure 3 As shown, in one embodiment, the voltage sampling module 21 includes a first resistor R1, a second resistor R2 and a first capacitor C1;

[0067] The first end of the first resistor R1 is the first sampling end of the voltage sampling module 21, the second end of the first resistor R1, the first end of the second resistor R2 and the first end of the first capacitor C1 are connected together to form a signal output end of the voltage sampling module 21, the second end of the second resistor R2 and the second end of the first capacitor C1 are connected to form a second sampling end of the voltage sampling module 21. In one embodiment, the voltage comparison module 22 includes a third resistor R3 and a first electronic switch tube Q1, the first end of the third resistor R3 is connected to the positive input end IN+ of the input port P1, the second end of the third resistor R3 and the input end of the first electronic switch tube Q1 are connected together to form a signal output end of the voltage comparison module 22, the controlled end of the first electronic switch tube Q1 is the signal input end of the voltage comparison module 22, and the output end of the first electronic switch tube Q1 is grounded.

[0068] In this embodiment, the first resistor R1 and the second resistor R2 form a resistor voltage divider circuit, which is used to provide a switching voltage to the first electronic switch tube Q1. The first electronic switch tube Q1 is turned on or off according to the size of the switching voltage, and then outputs high and low levels to the switch circuit 10. Assuming that the current voltage driving signal is greater than the preset voltage, the first electronic switch tube Q1 is turned on, the first electronic switch tube Q1 outputs a low level to the second electronic switch tube Q2, and the second electronic switch tube Q2 is turned off. The resistance value of the input port P1 is the resistance value of the relay coil of the fire-fighting equipment 300. When the voltage driving signal is less than the preset voltage, the first electronic switch tube Q1 is turned off, and the second electronic switch tube Q2 is turned on. The resistance value of the input port P1 is the resistance value of the relay coil of the fire-fighting equipment 300 and the corresponding total resistance value of the fourth resistor R4 and the fifth resistor R5. The resistance values ​​of the first resistor R1 and the second resistor R2 can be matched and set according to the preset voltage size to meet the on and off requirements of the switch circuit 10.

[0069] In one embodiment, the first electronic switch tube Q1 and the second electronic switch tube Q2 are both NPN transistors.

[0070] In one embodiment, a second capacitor C2 is connected in parallel across the positive input terminal IN+ and the negative input terminal IN- of the input port P1 to filter the voltage driving signal.

[0071] like Figure 2 As shown, in one embodiment, the terminator 100 further includes an anti-reverse connection circuit 50, and the anti-reverse connection circuit 50 is connected between the input end and the switch circuit 10;

[0072] The anti-reverse connection circuit 50 is used for unidirectionally outputting a voltage driving signal to the switch circuit 10. When the polarity of the voltage driving signal inputted to the input port P1 is opposite, it cannot be outputted to the switch circuit 10, so as to avoid the problem that the switch circuit 10 and the switch control circuit 20 are damaged due to the change of polarity. The anti-reverse connection circuit 50 can adopt a switch tube, a diode D1 and the like, such as Figure 3 As shown, in one embodiment, the reverse connection protection circuit 50 includes a diode D1 , an anode of the diode D1 is connected to the input terminal, and a cathode of the diode D1 is connected to the input terminal of the switch circuit 10 .

[0073] like Figure 4As shown, the second aspect of the embodiment of the present invention provides a control device for fire-fighting equipment 300, which includes a power module 400, a manual control panel 200 and a terminal 100. The specific structure of the terminal 100 refers to the above embodiment. Since the control device for fire-fighting equipment 300 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the output port P2 of the manual control panel 200 is connected to the input port P1 of the terminal 100, the output port P2 of the terminal 100 is connected to the relay coil of the fire-fighting equipment 300, the power end of the power module 400 is connected to the relay contact of the fire-fighting equipment 300, and the feedback port P3 of the terminal 100 is connected to the power end of the fire-fighting equipment 300 and is short-circuited when the fire-fighting equipment 300 is powered on;

[0074] A power module 400, used to output working power to the relay of the fire fighting equipment 300;

[0075] The manual control panel 200 is used to output a first voltage driving signal and a second voltage driving signal to the terminator 100 in a first preset time period and a second preset time period respectively, wherein the voltage of the first voltage driving signal is greater than or equal to the preset voltage, and the voltage of the second voltage driving signal is less than the preset voltage;

[0076] The terminator 100 is used for:

[0077] Outputting the first voltage driving signal and the second voltage driving signal to the relay, and controlling the relay and the fire fighting equipment 300 to be powered on;

[0078] And the resistance value of the input port P1 is changed according to the first voltage driving signal and the second voltage driving signal, so that the manual control panel 200 determines the working state of the fire fighting equipment 300 according to the resistance value of the input port P1.

[0079] In this embodiment, the power module 400 provides a relay working power supply, which can be a DC power supply or an AC power supply. According to the corresponding selection of the driving mode of the fire-fighting equipment 300, the manual control panel 200 outputs a voltage driving signal to make the relay of the fire-fighting equipment 300 powered on and attracted. The terminator 100 controls the switch circuit 10 to turn off when receiving the first preset voltage signal, and controls the switch circuit 10 to turn on when receiving the second preset voltage signal. The first preset voltage signal and the second preset voltage signal can be set accordingly. In one embodiment, the voltage of the first preset voltage signal is 24V, and the voltage of the second preset voltage signal is 9V. Figure 5As shown, according to the characteristics of the relay, after the relay is actuated, the voltage is lower than the rated voltage for a short time, and the relay remains in the energized state. When the manual control panel 200 outputs 24V, the switch circuit 10 is turned off, and the fourth resistor R4 and the fifth resistor R5 are in a non-operating state. When 9V is output for a short time, the fourth resistor R4 and the fifth resistor R5 are in an operating state, and are fed back to the input port P1 to change the resistance value of the input port P1. The manual control panel 200 can determine the mutual and individual working states of the manual control panel 200, the terminator 100, and the fire fighting equipment 300 according to the resistance value of the input port P1.

[0080] like Figure 6 As shown, in one embodiment, the manual control panel 200 includes a controller 210, a sampling circuit 230 and a driving circuit 220, the controller 210 is electrically connected to the driving circuit 220 and the sampling circuit 230 respectively, and the driving circuit 220 and the sampling circuit 230 are respectively connected to the power supply terminal and the ground terminal of the manual control panel 200;

[0081] The controller 210 is used to output a control signal to the driving circuit 220;

[0082] The driving circuit 220 is used to output a first voltage driving signal and a second voltage driving signal to the terminator 100 in a first preset time period and a second preset time period respectively according to the control signal;

[0083] The sampling circuit 230 is used to sample the current at the power supply end and the ground end of the manual control panel 200, and feed back the current sampling signal to the controller 210, so that the controller 210 determines the resistance value of the input port P1 of the terminator 100 and the working status of the fire fighting equipment 300 according to the current value of the current sampling signal.

[0084] In this embodiment, the controller 210 can adopt a structural processor such as MCU, CPU, DSP, etc. The controller 210 outputs a control signal to the drive circuit 220, and at the same time receives a current sampling signal fed back by the sampling circuit 230. The resistance value of the input port P1 of the terminal 100 can be calculated according to the voltage drive signal and the current sampling signal output by the drive circuit 220, and then the current working status of the terminal 100 and the fire-fighting equipment 300 can be determined, and the connection working status between the manual control panel 200 can be determined. The controller 210 can also feed back the working status of each module to the terminal device in the fire control room. The terminal device 6 can be a computing device such as a desktop computer, a notebook, a handheld computer, and a cloud server.

[0085] The driving circuit 220 may adopt structures such as a buck-boost circuit, a switching power supply chip, etc., and the sampling circuit 230 may adopt structures such as a current transformer, a current sampling module, etc. The specific structure is selected according to design requirements.

[0086] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A terminal, characterized in that: It includes a switch circuit, a switch control circuit, a first resistive element and a second resistive element; The input end of the switch circuit is connected to the first signal end of the switch control circuit to form the positive input end of the input port and the positive output end of the output port of the terminator, the second end of the switch circuit is connected to the first end of the first resistive element, the second end of the first resistive element is connected to the first end of the second resistive element to form the positive feedback end of the feedback port of the terminator, the second signal end of the switch control circuit and the second end of the second resistive element are both grounded to form the negative input end of the input port of the terminator, the negative output end of the output port and the negative feedback end of the feedback port, and the control end of the switch control circuit is connected to the controlled end of the switch circuit; The input port is used to connect to the power supply terminal of the manual control panel to receive the voltage driving signal output by the manual control panel; The output port is used to connect to the relay coil of the fire-fighting equipment, and output the voltage drive signal to the relay coil, so as to control the power-on of the fire-fighting equipment through the relay coil; The feedback port is used to be connected to the power supply terminal of the fire-fighting equipment and is short-circuited when the fire-fighting equipment is powered on, so as to short-circuit the second resistive element; The switch control circuit is used for: Detect the voltage of the voltage drive signal, control the switch circuit to turn off when the voltage of the voltage drive signal is greater than or equal to a preset voltage, and control the switch circuit to turn on when the voltage of the voltage drive signal is less than the preset voltage, so as to change the resistance value of the input port according to the voltage of the voltage drive signal, so that the manual control panel determines the working state of the fire-fighting equipment according to the resistance value of the input port.

2. The terminal according to claim 1, characterized in that: The switch control circuit comprises a voltage sampling module and a voltage comparison module, wherein the first sampling terminal of the voltage sampling module is the first signal terminal of the switch control circuit, the second sampling terminal of the voltage sampling module is the second signal terminal of the switch control circuit, the signal output terminal of the voltage sampling module is connected to the signal input terminal of the voltage comparison module, and the signal output terminal of the voltage comparison module is the control terminal of the switch control circuit; The voltage sampling module is used to detect the voltage of the voltage driving signal and feed it back to the voltage comparison module; The voltage comparison module controls the switch circuit to be turned off when the voltage of the voltage driving signal is greater than or equal to the preset voltage, and controls the switch circuit to be turned on when the voltage of the voltage driving signal is less than the preset voltage, so as to change the resistance value of the input port according to the voltage of the voltage driving signal, so that the manual control panel determines the working state of the fire-fighting equipment according to the resistance value of the input port.

3. The terminal according to claim 2, characterized in that: The voltage sampling module includes a first resistor, a second resistor and a first capacitor; The first end of the first resistor is the first sampling end of the voltage sampling module, the second end of the first resistor, the first end of the second resistor and the first end of the first capacitor are connected together to form a signal output end of the voltage sampling module, and the second end of the second resistor and the second end of the first capacitor are connected to form a second sampling end of the voltage sampling module.

4. The terminal according to claim 2, characterized in that: The voltage comparison module includes a third resistor and a first electronic switch tube. The first end of the third resistor is connected to the positive input end of the input port, and the second end of the third resistor is connected to the input end of the first electronic switch tube to form a signal output end of the voltage comparison module. The controlled end of the first electronic switch tube is the signal input end of the voltage comparison module, and the output end of the first electronic switch tube is grounded.

5. The terminal according to claim 1, characterized in that: The switch circuit comprises a second electronic switch tube, the input end, the output end and the controlled end of the second electronic switch tube are respectively the input end, the output end and the controlled end of the switch circuit.

6. The terminal according to claim 1, characterized in that: The first resistive element includes a fourth resistor, and the second resistive element includes a fifth resistor.

7. The terminal according to claim 1, characterized in that: The terminator further comprises an anti-reverse connection circuit, wherein the anti-reverse connection circuit is connected between the input end and the switch circuit; The anti-reverse connection circuit is used for unidirectionally outputting the voltage driving signal to the switch circuit.

8. The terminal according to claim 7, characterized in that: The anti-reverse connection circuit comprises a diode, an anode of the diode is connected to the input end, and a cathode of the diode is connected to the input end of the switch circuit.

9. A fire fighting equipment control device, characterized in that: It comprises a power module, a manual control panel and a terminator as claimed in any one of claims 1 to 8; The output port of the manual control panel is connected to the input port of the terminator, the output port of the terminator is connected to the relay coil of the fire-fighting equipment, the power supply end of the power module is connected to the relay contact of the fire-fighting equipment, and the feedback port of the terminator is connected to the power supply end of the fire-fighting equipment and is short-circuited when the fire-fighting equipment is powered on; The power supply module is used to output working power to the relay of the fire-fighting equipment; The manual control panel is used to output a first voltage drive signal and a second voltage drive signal to the terminator in a first preset time period and a second preset time period respectively, wherein the voltage of the first voltage drive signal is greater than or equal to the preset voltage, and the voltage of the second voltage drive signal is less than the preset voltage; The terminal is used for: Outputting the first voltage driving signal and the second voltage driving signal to the relay, and controlling the relay and the fire fighting equipment to be powered on; And the resistance value of the input port is changed according to the first voltage driving signal and the second voltage driving signal, so that the manual control panel determines the working state of the fire fighting equipment according to the resistance value of the input port.

10. The fire fighting equipment control device according to claim 9, characterized in that: The manual control panel includes a controller, a sampling circuit and a driving circuit, wherein the controller is electrically connected to the driving circuit and the sampling circuit respectively, and the driving circuit and the sampling circuit are respectively connected to a power supply terminal and a ground terminal of the manual control panel; The controller is used to output a control signal to the driving circuit; The driving circuit is used to output a first voltage driving signal and a second voltage driving signal to the terminator in a first preset time period and a second preset time period respectively according to the control signal; The sampling circuit is used to sample the current at the power supply end and the ground end of the manual control panel, and to feed back the current sampling signal to the controller, so that the controller determines the resistance value of the input port of the terminator and the working status of the fire-fighting equipment according to the current value of the current sampling signal.

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