CN211981757U - Terminal device and fire-fighting equipment control device - Google Patents
Terminal device and fire-fighting equipment control device Download PDFInfo
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- CN211981757U CN211981757U CN202020482778.1U CN202020482778U CN211981757U CN 211981757 U CN211981757 U CN 211981757U CN 202020482778 U CN202020482778 U CN 202020482778U CN 211981757 U CN211981757 U CN 211981757U
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Abstract
The utility model is suitable for the fire fighting technical field, in particular to a terminal device and a fire fighting equipment control device, wherein, the terminal device comprises a switch control circuit, a switch circuit, a first resistance element and a second resistance element to form the terminal device, the terminal device is connected with a manual control panel through a positive input end and a negative input end of an input port in two lines, the wiring cost and the wire rod cost are reduced, meanwhile, a voltage driving signal input by the manual control panel can carry out power-on suction control on a relay of the fire fighting equipment, further, the fire fighting equipment is controlled to be powered on, after the fire fighting equipment is powered on, the second resistance element is in short circuit, the switch control circuit controls the switch circuit to be conducted according to the size of the voltage driving signal, further, the resistance value of the output input port is changed, the manual control panel can determine the working state of the fire fighting equipment according to the size of, so as to carry out quick investigation and maintenance when the fire-fighting equipment works abnormally, and improve the safety.
Description
Technical Field
The utility model belongs to the technical field of the fire control, especially, relate to a terminal and fire-fighting equipment controlling means.
Background
Along with the improvement of the safety of industrial places, fire-fighting equipment such as smoke exhaust fans and water pumps are remotely controlled through manual control panels in fire-fighting control rooms, and the fire-fighting equipment can be remotely started in emergency, so that the fire rescue efficiency is improved.
The conventional manual control panel is generally a three-wire control panel connected to the fire fighting equipment through three wires including a start output wire, a feedback wire, and a common wire connecting the start output wire and the feedback wire, which results in a high cost of the wires of the three wires because the fire fighting control room is generally far away from the consumer equipment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a terminator aims at solving the three-way wire rod higher problem of cost of being connected between three-way control panel and the fire-fighting equipment.
The embodiment of the utility model provides a first aspect provides a terminator, and the terminator includes switch circuit, on-off control circuit, first resistive element and second resistive element;
the input end of the switch circuit is connected with the first signal end of the switch control circuit to form a positive input end of the input port and a positive output end of the output port of the terminator, the second end of the switch circuit is connected with the first end of the first resistive element, the second end of the first resistive element is connected with the first end of the second resistive element to form a 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 grounded to form a negative input end of the input port of the terminator, a negative output end of the output port and a negative feedback end of the feedback port, and the control end of the switch control circuit is connected with the controlled end of the switch circuit;
the input port is used for being connected with a power supply end of the manual control panel and receiving a voltage driving signal output by the manual control panel;
the output port is used for being connected with a relay coil of fire fighting equipment and outputting the voltage driving signal to the relay coil so as to control the fire fighting equipment to be electrified through the relay coil;
the feedback port is used for being connected with a power supply end of the fire fighting equipment and is short-circuited when the fire fighting equipment is powered on so as to enable the second resistive element to be short-circuited;
the switch control circuit is configured to:
the voltage of the voltage driving signal is detected, the switch circuit is controlled to be switched off when the voltage of the voltage driving signal is larger than or equal to a preset voltage, the switch circuit is controlled to be switched on when the voltage of the voltage driving signal is smaller than the preset voltage, so that the resistance value of the input port is changed according to the voltage of the voltage driving signal, and the manual control panel determines the working state of the fire fighting equipment according to the resistance value of the input port.
In one embodiment, the switch control circuit comprises a voltage sampling module and a voltage comparison module, wherein a first sampling end of the voltage sampling module is a first signal end of the switch control circuit, a second sampling end of the voltage sampling module is a second signal end of the switch control circuit, a signal output end of the voltage sampling module is connected with a signal input end of the voltage comparison module, and a signal output end of the voltage comparison module is a control end of the switch control circuit;
the voltage sampling module is used for detecting the voltage of the voltage driving signal and feeding the voltage to the voltage comparison module;
the voltage comparison module controls the switch circuit to be switched off when the voltage of the voltage driving signal is greater than or equal to a preset voltage, and controls the switch circuit to be switched 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, and the manual control panel determines the working state of the fire fighting equipment according to the resistance value of the input port.
In one embodiment, the voltage sampling module comprises a first resistor, a second resistor and a first capacitor;
the first end of first resistance is the first sampling end of voltage sampling module, the second end of first resistance the first end of second resistance with the first end of first electric capacity connects the constitution altogether the signal output part of voltage sampling module, the second end of second resistance with the second end of first electric capacity is connected the constitution the second sampling end of voltage sampling module.
In one embodiment, the voltage comparison module includes a third resistor and a first electronic switch tube, a first end of the third resistor is connected to the positive input end of the input port, a second end of the third resistor and the input end of the first electronic switch tube are connected in common to form a signal output end of the voltage comparison module, a controlled end of the first electronic switch tube is a signal input end of the voltage comparison module, and an output end of the first electronic switch tube is grounded.
In one embodiment, the switching circuit includes a second electronic switching tube, and the input terminal, the output terminal, and the controlled terminal of the second electronic switching tube are the input terminal, the output terminal, and the controlled terminal of the switching circuit, respectively.
In one embodiment, the first resistive element includes a fourth resistance and the second resistive element includes a fifth resistance.
In one embodiment, the termination further comprises an anti-reverse connection circuit connected between the input terminal and the switching circuit;
and the reverse connection preventing circuit is used for outputting the voltage driving signal to the switch circuit in a single direction.
In one embodiment, the reverse connection prevention circuit includes a diode, an anode of the diode is connected with the input terminal, and a cathode of the diode is connected with the input terminal of the switch circuit.
A second aspect of the embodiments of the present invention provides a fire fighting equipment control device, which includes a power module, a manual control panel, and the terminal device;
the output port of the manual control panel is connected with the input port of the terminal device, the output port of the terminal device is connected with a relay coil of the fire fighting equipment, the power supply end of the power supply module is connected with a relay contact of the fire fighting equipment, and the feedback port of the terminal device is connected with 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 for outputting a working power supply to a relay of the fire fighting equipment;
the manual control panel is used for respectively outputting 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 in sequence, 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;
the terminal device 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 changing the resistance value of the input port 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.
In one embodiment, the manual control panel comprises a controller, a sampling circuit and a driving circuit, wherein the controller is electrically connected with the driving circuit and the sampling circuit respectively, and the driving circuit and the sampling circuit are connected with a power supply end and a grounding end of the manual control panel respectively;
the controller is used for outputting a control signal to the driving circuit;
the driving circuit is used for respectively outputting 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 in sequence according to the control signal;
the sampling circuit is used for sampling current of the power supply end and the grounding end of the manual control panel and feeding back a current sampling signal to the controller, so that the controller determines the resistance value of the input port of the terminator and the working state of the fire fighting equipment according to the current value of the current sampling signal.
The utility model adopts the switch control circuit, the switch circuit, the first resistance element and the second resistance element to form the terminal device, the terminal device is connected with the manual control panel by two lines through the positive input end and the negative input end of the input port, the wiring cost and the wire rod cost are reduced, meanwhile, the voltage driving signal input by the manual control panel can carry out power-on actuation control on the relay of the fire fighting equipment so as to control the fire fighting equipment to be powered on, after the fire fighting equipment is powered on, the second resistive element is in short circuit, the switch control circuit correspondingly controls the switch circuit to be conducted according to the magnitude of the voltage driving signal, and then change the resistance value of output and input port, the operating condition of fire control equipment can be confirmed according to the size of resistance value to manual control panel, realizes the purpose to the control of fire control equipment to carry out quick investigation maintenance when fire control equipment work is unusual, improve the security.
Drawings
Fig. 1 is a schematic diagram of a module structure of a first embodiment of the termination of the present invention;
fig. 2 is a schematic diagram of a module structure of a second embodiment of the termination of the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of the termination of the present invention;
FIG. 4 is a schematic diagram of a module structure of an embodiment of the fire fighting equipment control device of the present invention;
fig. 5 is a schematic waveform diagram of the first voltage driving signal and the second voltage driving signal according to the present invention;
fig. 6 is a schematic diagram of a module structure of an embodiment of a manual control panel in the fire fighting equipment control device of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
A first aspect of the embodiments of the present invention provides a terminal 100.
As shown in fig. 1, fig. 1 is a schematic block diagram of a terminal device according to a first embodiment of the present invention, in this embodiment, a terminal device 100 includes a switch circuit 10, a switch control circuit 20, a first resistive element 30, and a second resistive element 40;
the input end of the switch circuit 10 is connected with the first signal end of the switch control circuit 20 to form a positive input end IN + of an input port P1 and a positive output end OUT + of an output port P2 of the terminator 100, the second end of the switch circuit 10 is connected with the first end of the first resistive element 30, the second end of the first resistive element 30 is connected with the first end of the second resistive element 40 to form a positive feedback end RET + of a 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 a negative input end IN of an input port P1, a negative output end OUT-of an output port P2 and a negative feedback end RET of a feedback port P3 of the terminator 100, and the control end of the switch control circuit 20 is connected with the controlled end of the switch circuit 10;
an input port P1 for connecting with the power supply terminal of the manual control panel 200 and receiving the voltage driving signal outputted from the manual control panel 200;
an output port P2 for connecting with the relay coil of the fire fighting equipment 300 and outputting a voltage driving signal to the relay coil to control the fire fighting equipment 300 to be powered on through the relay coil;
a feedback port P3 for connection to a power supply terminal of the fire fighting apparatus 300, and short-circuited when the fire fighting apparatus 300 is powered on to short-circuit the second resistive element 40;
the switch control circuit 20 is configured to:
the voltage of the voltage driving signal is detected, the switching circuit 10 is controlled to be turned off when the voltage of the voltage driving signal is greater than or equal to a preset voltage, and the switching circuit 10 is controlled to be turned on when the voltage of the voltage driving signal is less than the preset voltage, so that the resistance value of the input port P1 is changed according to the voltage of the voltage driving signal, and 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.
IN this embodiment, the terminal device 100 is disposed adjacent to the fire fighting equipment 300, the terminal device 100 may be disposed inside the fire fighting equipment 300 or disposed separately, the input port P1 of the terminal device 100 is connected to the manual control panel 200 IN the control room through the positive input port IN + and the negative input port IN-, the manual control panel 200 is connected to the terminal device 100 through only two connection lines, and one less line is routed from the control room to the field device, thereby reducing the line cost and the wiring cost.
The output port P2 is connected with a relay coil of the fire fighting equipment 300, the relay coil is electrified to attract a contact and control the fire fighting equipment 300 to be electrified, the feedback end is connected with a power supply end of the fire fighting equipment 300 and is used for feeding back whether the fire fighting equipment 300 is normally electrified, the positive feedback end RET + and the negative feedback end RET-are communicated and short-circuited when the fire fighting equipment 300 is normally electrified, the positive feedback end RET + is disconnected with the negative feedback end RET-when the fire fighting equipment 300 is not normally electrified, the positive feedback end RET + can be connected with a first end of the relay contact, the negative feedback end RET-is connected with a second end of the relay contact, 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 switched on, the resistance value of the input port P1 is the parallel sum of the resistance value of the relay, second resistive element 40 is not shorted, and when the voltage drive signal is between the first preset voltage and the second preset voltage, switch control circuit 20 controls switch circuit 10 to be turned on, and the resistance value of input port P1 is the parallel sum of the resistance value of the relay coil and first resistive element 30 and second resistive element 40.
Assuming that the coil resistance is Rx, the first resistive element 30 resistance is Ri, the second resistive element 40 resistance is Rj, when the feedback terminal operates, the input port P1 resistance is Ri Rx/(Ri + Rx), when the feedback terminal does not operate, the input port P1 resistance is (Ri + Rj) × Rx/(Ri + Rj + Rx), therefore, the manual control panel 200 can know the resistance of the input port P1 by outputting a voltage driving signal and sampling the current of the input port P1 through the sampling circuit 230, and then determine whether the fire fighting equipment 300 is normally powered on, meanwhile, when the input port P1 is short-circuited, the resistance of the input port P1 is zero, when the terminator 100 and the manual control panel 200 have a broken line fault, the resistance of the input port P1 is infinite, when the terminator 100 and the fire fighting equipment 300 have a broken line fault, the resistance of the input port P1 is Ri or Ri + Rj, therefore, in the on state of the switch circuit 10, the manual control panel 200 can determine the power-on state of the fire fighting device 300, the connection state of the fire fighting device 300 with the terminal device 100, and the connection state of the manual control panel 200 with the terminal device 100 according to the resistance value of the input port P1.
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, at this time, the input port P1 is cut off 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 value of the input port P1 is Rx, when the disconnection fault occurs between the terminator 100 and the manual control panel 200, the resistance value of the input port P1 is infinite, and when the disconnection connection between the terminator 100 and the fire fighting equipment 300 is established, the resistance value of the input port P1 is also infinite, therefore, when the fire fighting equipment 300 is drive-controlled, by outputting voltage driving signals of different magnitudes to the terminator 100, and judging the operating states between the manual control panel 200, the terminator 100 and the fire fighting equipment 300 according to the resistance value 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 the voltage driving signal is 9, and the relay can normally work at 24V and 9V, as shown in Table 1:
TABLE 1
As can be seen from table 1, when the terminator 100 receives voltage driving signals of different magnitudes, the switch control circuit 20 controls the switch circuit 10 to be correspondingly turned on and off, and then the resistance value of the input port P1 is changed, and the manual control panel 200 can know the working states of the manual control panel 200, the terminator 100 and the fire fighting equipment 300, and the working states of the manual control panel 200, the terminator 100 and the fire fighting equipment 300, respectively, according to the resistance value of the input port P1.
The input port P1, the output port P2, and the feedback port P3 may be connectors, pins, male/female connectors, and the specific structure is selected according to the requirement.
The switch control circuit 20 controls the switch circuit 10 to be turned on according to the magnitude of the voltage driving signal at the input port P1, the switch control circuit 20 may employ a control chip, a voltage comparison module 22 or other control modules, and the switch circuit 10 may employ a switching device with controlled on/off capability, such as a switch tube, a relay, etc., as shown in fig. 3, in an embodiment, the switch circuit 10 includes a second electronic switch tube Q2, and the input terminal, the output terminal and the controlled terminal of the second electronic switch tube Q2 are the input terminal, the output terminal and the controlled terminal of the switch circuit 10, respectively.
First resistive element 30 and second resistive element 40 may be implemented using resistive elements such as inductors, resistors, etc., and as shown in FIG. 3, in one embodiment, first resistive element 30 includes a fourth resistor R4 and second resistive element 40 includes a fifth resistor R5.
The utility model discloses an adopt switch control circuit 20, switch circuit 10, first resistive element 30 and second resistive element 40 constitution terminator 100, terminator 100 carries out two-line connection through positive input end IN + and negative input end IN-of input port P1 with manual control panel 200, wiring cost and wire rod cost are reduced, simultaneously, the voltage drive signal that manual control panel 200 was input can carry out circular telegram actuation control to the relay of fire-fighting equipment 300, and then control fire-fighting equipment 300 and go up, after fire-fighting equipment 300 goes up, second resistive element 40 short circuit, switch control circuit 20 corresponds control switch circuit 10 according to the size of voltage drive signal and switches on, and then change the resistance value of output input port P1, manual control panel 200 can confirm the operating condition of fire-fighting equipment 300 according to the size of resistance value, realize the purpose to the control of fire-fighting equipment 300, so as to carry out quick troubleshooting and maintenance when the fire fighting equipment 300 works abnormally, and improve the safety.
As shown in fig. 2, in an embodiment, the switch control circuit 20 includes a voltage sampling module 21 and a voltage comparison module 22, a first sampling end of the voltage sampling module 21 is a first signal end of the switch control circuit 20, a second sampling end of the voltage sampling module 21 is a second signal end of the switch control circuit 20, a signal output end of the voltage sampling module 21 is connected to a signal input end of the voltage comparison module 22, and a signal output end of the voltage comparison module 22 is a control end of the switch control circuit 20;
the voltage sampling module 21 is used for detecting the voltage of the voltage driving signal and feeding the voltage to the voltage comparison module 22;
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, and 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.
In this embodiment, the voltage sampling module 21 may adopt a voltage transformer, a resistor divider circuit, and the like, the voltage comparison module 22 may adopt a comparator, a triode circuit, the voltage comparison module 22 controls the switch circuit 10 to turn off when determining 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, the switch-on is switched to turn-off or turn-off is switched to turn-on, the resistance value of the input port P1 also changes correspondingly, and the manual control panel 200 may determine the working state of the fire fighting equipment 300 according to the resistance value of the input port P1.
As shown in fig. 3, in one embodiment, the voltage sampling module 21 includes a first resistor R1, a second resistor R2, and a first capacitor C1;
IN an embodiment, the voltage comparison module 22 includes a third resistor R3 and a first electronic switch tube Q1, a first end of the third resistor R3 is connected to the positive input end IN + of the input port P1, a second end of the third resistor R3 and the input end of the first electronic switch tube Q1 are connected to form the 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.
In this embodiment, the first resistor R1 and the second resistor R2 form a resistor divider circuit for providing a switching voltage to the first electronic switch Q1, the first electronic switch Q1 is turned on or off according to the magnitude of the switching voltage, and further outputs a high level and a low level to the switch circuit 10, assuming that the current voltage driving signal is greater than the preset voltage, the first electronic switch Q1 is turned on, the first electronic switch Q1 outputs a low level to the second electronic switch Q2, the second electronic switch 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 Q1 is turned off, the second electronic switch 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 values 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 set according to the magnitude of the preset voltage, to meet the turn-on and turn-off requirements of the switching circuit 10.
In one embodiment, the first electronic switch Q1 and the second electronic switch Q2 are NPN transistors.
IN one embodiment, a second capacitor C2 is connected IN parallel to the positive input terminal IN + and the negative input terminal IN-of the input port P1 for filtering the voltage driving signal.
As shown in fig. 2, in one embodiment, the terminal 100 further includes an anti-reverse connection circuit 50, the anti-reverse connection circuit 50 being connected between the input terminal and the switching circuit 10;
the reverse connection preventing circuit 50 is configured to output a voltage driving signal to the switch circuit 10 in a unidirectional manner, and when the voltage driving signal input through the input port P1 has a reverse polarity, the voltage driving signal cannot be output to the switch circuit 10, so as to avoid a problem that the switch circuit 10 and the switch control circuit 20 are damaged due to a polarity change, where the reverse connection preventing circuit 50 may adopt a switch tube, a diode D1, and the like, as shown in fig. 3, in an embodiment, the reverse connection preventing circuit 50 includes a diode D1, an anode of the diode D1 is connected to the input end, and a cathode of the diode D1 is connected to the input end of the switch circuit 10.
As shown in fig. 4, the second aspect of the embodiment of the present invention provides a control device for fire fighting equipment 300, the control device for fire fighting equipment 300 includes a power module 400, a manual control panel 200 and a terminal device 100, the specific structure of the terminal device 100 refers to the above embodiments, and since the control device for fire fighting equipment 300 adopts all technical solutions of all the above embodiments, all beneficial effects brought by the technical solutions of the above embodiments are at least achieved, and are not repeated herein. Wherein, the output port P2 of the manual control panel 200 is connected with the input port P1 of the terminal device 100, the output port P2 of the terminal device 100 is connected with the relay coil of the fire fighting equipment 300, the power supply terminal of the power module 400 is connected with the relay contact of the fire fighting equipment 300, the feedback port P3 of the terminal device 100 is connected with the power supply terminal of the fire fighting equipment 300 and is short-circuited when the fire fighting equipment 300 is powered on;
a power module 400 for outputting a working power to a relay of the fire fighting device 300;
a manual control panel 200, configured 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, where a voltage of the first voltage driving signal is greater than or equal to a preset voltage, and a voltage of the second voltage driving signal is less than the preset voltage;
a termination 100 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 300 to be powered on;
and changing a resistance value of the input port P1 according to the first voltage driving signal and the second voltage driving signal so that the manual control panel 200 determines an operation state of the fire fighting apparatus 300 according to the resistance value of the input port P1.
In this embodiment, the power module 400 provides a working power source of the relay, which may be a dc power source or an ac power source, and is correspondingly selected according to a driving mode of the fire fighting equipment 300, the manual control panel 200 outputs a voltage driving signal to power on and pull on the relay of the fire fighting equipment 300, the terminal device 100 controls the switch circuit 10 to be turned off when receiving a first preset voltage signal, and controls the switch circuit 10 to be turned on when receiving a second preset voltage signal, where the first preset voltage signal and the second preset voltage signal may be correspondingly set, in one embodiment, the voltage of the first preset voltage signal is 24V, the voltage of the second preset voltage signal is 9V, as shown in fig. 5, according to a characteristic of the relay, after the relay operates, the short time is lower than a rated voltage, and the relay still maintains a pull-in state. When the manual control panel 200 outputs 24V, the switch circuit 10 is turned off, the fourth resistor R4 and the fifth resistor R5 are in an off state, when 9V is output for a short time, the fourth resistor R4 and the fifth resistor R5 are in an on state and feed back to the input port P1 to change the resistance of the input port P1, and the manual control panel 200 can determine the mutual and individual operating states of the manual control panel 200, the terminator 100 and the fire fighting equipment 300 according to the resistance of the input port P1.
As shown in fig. 6, 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 connected to a power terminal and a ground terminal of the manual control panel 200, respectively;
a controller 210 for outputting a control signal to the driving circuit 220;
the driving circuit 220 is configured 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 in sequence according to the control signal;
the sampling circuit 230 is configured to sample current of the power terminal and the ground terminal of the manual control panel 200, and feed back a current sampling signal to the controller 210, so that the controller 210 determines a resistance value of the input port P1 of the terminal 100 and an operating state of the fire fighting device 300 according to a current value of the current sampling signal.
In this embodiment, the controller 210 may adopt a structural processor such as an MCU, a CPU, a DSP, etc., the controller 210 outputs a control signal to the driving circuit 220, and receives a current sampling signal fed back by the sampling circuit 230, and may calculate a resistance value of the input port P1 of the terminal 100 according to a voltage driving signal and a current sampling signal output by the driving circuit 220, so as to determine respective working states of the terminal 100 and the fire fighting equipment 300, and a connection working state between the terminal and the manual control panel 200, the controller 210 may also feed back a working state of each module to a terminal of the fire fighting control room, and the terminal 6 may be a computing device such as a desktop computer, a notebook, a palm computer, a cloud server, etc.
The driving circuit 220 can adopt a buck-boost circuit, a switching power supply chip and other structures, the sampling circuit 230 can adopt a current transformer, a current sampling module and other structures, and the specific structure is selected according to design requirements.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A terminator is characterized by comprising 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 with the first signal end of the switch control circuit to form a positive input end of the input port and a positive output end of the output port of the terminator, the second end of the switch circuit is connected with the first end of the first resistive element, the second end of the first resistive element is connected with the first end of the second resistive element to form a 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 grounded to form a negative input end of the input port of the terminator, a negative output end of the output port and a negative feedback end of the feedback port, and the control end of the switch control circuit is connected with the controlled end of the switch circuit;
the input port is used for being connected with a power supply end of the manual control panel and receiving a voltage driving signal output by the manual control panel;
the output port is used for being connected with a relay coil of fire fighting equipment and outputting the voltage driving signal to the relay coil so as to control the fire fighting equipment to be electrified through the relay coil;
the feedback port is used for being connected with a power supply end of the fire fighting equipment and is short-circuited when the fire fighting equipment is powered on so as to enable the second resistive element to be short-circuited;
the switch control circuit is configured to:
the voltage of the voltage driving signal is detected, the switch circuit is controlled to be switched off when the voltage of the voltage driving signal is larger than or equal to a preset voltage, the switch circuit is controlled to be switched on when the voltage of the voltage driving signal is smaller than the preset voltage, so that the resistance value of the input port is changed according to the voltage of the voltage driving signal, and the manual control panel determines the working state of the fire fighting equipment according to the resistance value of the input port.
2. The terminator of claim 1, wherein the switch control circuit comprises a voltage sampling module and a voltage comparison module, a first sampling terminal of the voltage sampling module is a first signal terminal of the switch control circuit, a second sampling terminal of the voltage sampling module is a second signal terminal of the switch control circuit, a signal output terminal of the voltage sampling module is connected with a signal input terminal of the voltage comparison module, and a signal output terminal of the voltage comparison module is a control terminal of the switch control circuit;
the voltage sampling module is used for detecting the voltage of the voltage driving signal and feeding the voltage to the voltage comparison module;
the voltage comparison module controls the switch circuit to be switched off when the voltage of the voltage driving signal is greater than or equal to a preset voltage, and controls the switch circuit to be switched 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, and the manual control panel determines the working state of the fire fighting equipment according to the resistance value of the input port.
3. A terminator according to claim 2, in which the voltage sampling module comprises a first resistor, a second resistor and a first capacitor;
the first end of first resistance is the first sampling end of voltage sampling module, the second end of first resistance the first end of second resistance with the first end of first electric capacity connects the constitution altogether the signal output part of voltage sampling module, the second end of second resistance with the second end of first electric capacity is connected the constitution the second sampling end of voltage sampling module.
4. The terminator of claim 2, wherein the voltage comparison module includes a third resistor and a first electronic switch tube, a first end of the third resistor is connected to the positive input terminal of the input port, a second end of the third resistor and the input terminal of the first electronic switch tube are connected in common to form a signal output terminal of the voltage comparison module, the controlled terminal of the first electronic switch tube is the signal input terminal of the voltage comparison module, and the output terminal of the first electronic switch tube is grounded.
5. The terminator of claim 1, wherein the switching circuit includes a second electronic switching tube, and the input, output and controlled terminals of the second electronic switching tube are the input, output and controlled terminals of the switching circuit, respectively.
6. The termination of claim 1, wherein the first resistive element comprises a fourth resistor and the second resistive element comprises a fifth resistor.
7. A terminator according to claim 1, wherein the terminator further comprises an anti-reverse circuit connected between the input terminal and the switching circuit;
and the reverse connection preventing circuit is used for outputting the voltage driving signal to the switch circuit in a single direction.
8. A terminator in accordance with claim 7, wherein the anti-reverse connection circuit comprises a diode, the anode of the diode being connected to the input terminal and the cathode of the diode being connected to the input terminal of the switching circuit.
9. A fire fighting equipment control device comprising a power supply module, a manual control panel and a terminal device according to any one of claims 1 to 8;
the output port of the manual control panel is connected with the input port of the terminal device, the output port of the terminal device is connected with a relay coil of the fire fighting equipment, the power supply end of the power supply module is connected with a relay contact of the fire fighting equipment, and the feedback port of the terminal device is connected with 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 for outputting a working power supply to a relay of the fire fighting equipment;
the manual control panel is used for respectively outputting 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 in sequence, 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;
the terminal device 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 changing the resistance value of the input port 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 apparatus control device of claim 9, wherein the manual control panel includes a controller, a sampling circuit and a driving circuit, the controller is electrically connected to the driving circuit and the sampling circuit, respectively, and the driving circuit and the sampling circuit are connected to a power terminal and a ground terminal of the manual control panel, respectively;
the controller is used for outputting a control signal to the driving circuit;
the driving circuit is used for respectively outputting 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 in sequence according to the control signal;
the sampling circuit is used for sampling current of the power supply end and the grounding end of the manual control panel and feeding back a current sampling signal to the controller, so that the controller determines the resistance value of the input port of the terminator and the working state of the fire fighting equipment according to the current value of the current sampling signal.
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| CN202020482778.1U CN211981757U (en) | 2020-04-03 | 2020-04-03 | Terminal device and fire-fighting equipment control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111478595A (en) * | 2020-04-03 | 2020-07-31 | 秦皇岛泰和安科技有限公司 | Terminal device and fire-fighting equipment control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111478595A (en) * | 2020-04-03 | 2020-07-31 | 秦皇岛泰和安科技有限公司 | Terminal device and fire-fighting equipment control device |
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