CN111478595B - Terminators and fire equipment control devices - Google Patents
Terminators and fire equipment control devices Download PDFInfo
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- CN111478595B CN111478595B CN202010258082.5A CN202010258082A CN111478595B CN 111478595 B CN111478595 B CN 111478595B CN 202010258082 A CN202010258082 A CN 202010258082A CN 111478595 B CN111478595 B CN 111478595B
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- voltage
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- fire
- driving signal
- fighting equipment
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- 238000005070 sampling Methods 0.000 claims 20
- 239000003990 capacitor Substances 0.000 claims 3
- 238000012544 monitoring process Methods 0.000 abstract 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/44—Conversion of DC power input into DC power output with intermediate conversion into AC by combination of static with dynamic converters; by combination of dynamo-electric with other dynamic or static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention is suitable for the technical field of fire protection, in particular to a terminal and a fire-fighting equipment control device, wherein the terminal comprises a switch control circuit, a switch circuit, a first resistive element and a second resistive element, the terminal 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 cost are reduced, meanwhile, a voltage driving signal input by the manual control panel can carry out electrifying and sucking control on a relay of fire-fighting equipment so as to control the power-on of the fire-fighting equipment, after the power-on of the fire-fighting equipment is finished, 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 so as to change the resistance value of an output input port, the manual control panel can determine the working state of the fire-fighting equipment according to the magnitude of the resistance value, and the aim of monitoring the fire-fighting equipment is fulfilled, so that rapid arranging and checking and repairing can be carried out when the fire-fighting equipment works abnormally, and the safety is improved.
Description
Technical Field
The invention belongs to the technical field of fire protection, and particularly relates to a terminal and a fire-fighting equipment control device.
Background
With the improvement of the safety of industrial sites, fire-fighting equipment such as smoke exhaust fans, water pumps and the like are usually remotely controlled by a manual control panel in a fire-fighting control room, and can be remotely started under emergency conditions, so that the fire-fighting rescue efficiency is improved.
Conventional manual control boards are typically three-wire control boards that are connected to fire-fighting equipment by three wires, including a start output wire, a feedback wire, and a common line connecting the start output wire and the feedback wire, resulting in a high wire cost for the three wires due to the typically large distance between the fire-fighting control room and the consumer equipment.
Disclosure of Invention
The invention aims to provide a terminator which aims to solve the problem that the cost of a three-wire connected between a three-wire control panel and fire-fighting equipment is high.
A first aspect of an embodiment of the present invention provides a terminator including a switching circuit, a switching control circuit, a first resistive element, and a second resistive element;
The input end of the switch circuit is connected with a first signal end of the switch control circuit to form a positive input end of an input port and a positive output end of an output port of the terminal, the second end of the switch circuit is connected with a first end of the first resistive element, the second end of the first resistive element is connected with a first end of the second resistive element to form a positive feedback end of a feedback port of the terminal, 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 terminal, 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 a controlled end of the switch circuit;
The input port is used for being connected with a power 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 the 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 end of the fire-fighting equipment and short-circuited when the fire-fighting equipment is electrified so as to enable the second resistive element to be short-circuited;
The switch control circuit is used for:
Detecting the voltage of the voltage driving signal, controlling the switching circuit to be turned off when the voltage of the voltage driving signal is larger than or equal to a preset voltage, and controlling the switching circuit to be turned 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 includes a voltage sampling module and a voltage comparing module, 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 comparing module, and a signal output end of the voltage comparing 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 back the voltage to the voltage comparison module;
the voltage comparison module is used for controlling the switching circuit to be turned off when the voltage of the voltage driving signal is larger than or equal to a preset voltage, and controlling the switching circuit to be turned 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 is used for determining the working state of the fire-fighting equipment according to the resistance value of the input port.
In one embodiment, the voltage sampling module includes a first resistor, a second resistor, and a first capacitor;
The first end of the first resistor is a 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.
In one embodiment, the voltage comparison module includes a third resistor and a first electronic switching tube, a first end of the third resistor is connected with the positive input end of the input port, a second end of the third resistor and an input end of the first electronic switching tube are commonly connected to form a signal output end of the voltage comparison module, a controlled end of the first electronic switching tube is a signal input end of the voltage comparison module, and an output end of the first electronic switching 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 comprises a fourth resistance and the second resistive element comprises a fifth resistance.
In one embodiment, the terminator further comprises an anti-reverse circuit connected between the input and the switching circuit;
The reverse connection preventing circuit is used for outputting the voltage driving signal to the switch circuit in one direction.
In one embodiment, the anti-reverse connection circuit comprises 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 switching circuit.
A second aspect of an embodiment of the present invention provides a fire-fighting equipment control device comprising a power module, a manual control panel and a terminator as described above;
The output port of the manual control panel is connected with the input port of the terminal, the output port of the terminal is connected with a relay coil of the fire-fighting equipment, the power end of the power module is connected with a relay contact of the fire-fighting equipment, and the feedback port of the terminal is connected with the power end of the fire-fighting equipment and is short-circuited when the fire-fighting equipment is electrified;
The power supply module is used for outputting a working power supply to the relay of the fire-fighting equipment;
The manual control panel is used for outputting a first voltage driving signal and a second voltage driving signal to the terminal device respectively 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 terminator 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 electrified;
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 disc can determine 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 respectively and electrically connected with the driving circuit and the sampling circuit, and the driving circuit and the sampling circuit are respectively connected with a power end and a ground end of the manual control panel;
the controller is used for outputting a control signal to the driving circuit;
the driving circuit is used for 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 respectively according to the control signal;
the sampling circuit is used for sampling the current of the power end and the grounding end of the manual control panel and feeding back a current sampling signal to the controller so that the controller can determine the resistance value of the input port of the terminal and the working state of the fire-fighting equipment according to the current value of the current sampling signal.
According to the invention, the terminal is formed by adopting the switch control circuit, the switch circuit, the first resistive element and the second resistive element, the terminal is connected with the manual control panel through the positive input end and the negative input end of the input port, so that the wiring cost and the wire cost are reduced, meanwhile, the voltage driving signal input by the manual control panel can carry out electrifying and sucking control on the relay of the fire-fighting equipment, the power-on of the fire-fighting equipment is further controlled, the second resistive element is in short circuit after the power-on of the fire-fighting equipment, the switch control circuit correspondingly controls the switch circuit to be conducted according to the magnitude of the voltage driving signal, the resistance value of the output port is further changed, the working state of the fire-fighting equipment can be determined by manually controlling the magnitude of the resistance value according to the magnitude of the resistance value, and the aim of monitoring the fire-fighting equipment is fulfilled, so that rapid check and repair can be carried out when the fire-fighting equipment works abnormally, and the safety is improved.
Drawings
Fig. 1 is a schematic block diagram of a first embodiment of a terminator according to the present invention;
fig. 2 is a schematic block diagram of a second embodiment of the terminal according to the present invention;
FIG. 3 is a schematic circuit diagram of an embodiment of the terminator of the present invention;
FIG. 4 is a schematic block diagram of a fire-fighting equipment control device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of waveforms of a first voltage driving signal and a second voltage driving signal according to the present invention;
Fig. 6 is a schematic block diagram 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 problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
A first aspect of an embodiment of the present invention provides a terminator 100.
As shown in fig. 1, fig. 1 is a schematic block diagram of a first embodiment of the terminator of the present invention, in which, the terminator 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 a 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 a first end of the first resistive element 30, a second end of the first resistive element 30 is connected with a first end of the second resistive element 40 to form a positive feedback end RET+ of a feedback port P3 of the terminator 100, and both the second signal end of the switch control circuit 20 and the second end of the second resistive element 40 are grounded to form a negative input end IN-, a negative output end OUT-of the output port P2 and a negative feedback end RET-of the feedback port P3 of the input port P1 of the terminator 100, and the control end of the switch control circuit 20 is connected with a controlled end of the switch circuit 10;
An input port P1, configured to be connected to a power supply terminal of the manual control panel 200, and receive a voltage driving signal output by the manual control panel 200;
an output port P2 for connecting with a relay coil of the fire fighting device 300, outputting a voltage driving signal to the relay coil, so as to control the fire fighting device 300 to be powered on through the relay coil;
a feedback port P3 for connecting with a power supply terminal of the fire-fighting device 300, and short-circuiting the second resistive element 40 when the fire-fighting device 300 is powered on;
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 protection device 300 according to the resistance value of the input port P1.
IN this embodiment, the terminal 100 is disposed adjacent to the fire-fighting device 300, the terminal 100 may be disposed inside the fire-fighting device 300 or separately disposed, the input port P1 of the terminal 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 is connected to the terminal 100 only through 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 to a relay coil of the fire-fighting device 300, the relay coil is electrically connected to the attraction contact and controls the fire-fighting device 300 to be electrified, the feedback end is connected to a power end of the fire-fighting device 300 and is used for feeding back whether the fire-fighting device 300 is electrified normally, the positive feedback end ret+ and the negative feedback end RET-are in short circuit connection when the fire-fighting device 300 is electrified normally, the positive feedback end ret+ and the negative feedback end RET-are disconnected when the fire-fighting device 300 is not electrified normally, the positive feedback end ret+ can be connected to a first end of the relay contact, the negative feedback end RET-can be connected to a second end of the relay contact, the specific connection position is not limited, the second resistive element 40 is short-circuited when the feedback port P3 is in short circuit operation, the resistance value of the input port P1 is the parallel sum of the resistance value of the relay coil and the resistance value of the first resistive element 30 when the feedback port P3 is not operated, the switch control circuit 20 controls the switch circuit 10 to be the sum of the resistance value of the relay coil and the resistance value of the first resistive element 30 when the voltage driving signal is between the first preset voltage and the second preset voltage.
Assuming that the resistance of the coil is Rx, the resistance of the first resistive element 30 is Ri, the resistance of the second resistive element 40 is Rj, when the feedback terminal is operated, the resistance of the input port P1 is Ri/(ri+rx), and when the feedback terminal is not operated, the resistance of the input port P1 is (ri+rj)/(ri+rj+rx), so that the manual control panel 200 can acquire 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, thereby judging whether the fire protection device 300 is normally powered on, and simultaneously, when the input port P1 is shorted, the resistance of the input port P1 is zero, when the terminal 100 is disconnected from the manual control panel 200, the resistance of the input port P1 is Ri or ri+rj, and when the relay of the terminal 100 is disconnected from the fire protection device 300 is disconnected from the line, and thus, the manual control panel 200 can be connected to the terminal 100 and the fire protection device 300 according to the resistance of the input port P1 and the manual control panel 300 in the on state of the switch circuit 10.
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 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 value of the input port P1 is infinite when the disconnection between the terminator 100 and the manual control panel 200 is failed, and the resistance value of the input port P1 is infinite when the disconnection between the terminator 100 and the fire protection device 300 is connected, therefore, when the fire protection device 300 is driven and controlled, the operating states among the manual control panel 200, the terminator 100 and the fire protection device 300 can be judged 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 is turned on when the voltage driving signal is 9V, and the relays can normally operate at both 24V and 9V, as shown in table 1:
TABLE 1
As can be seen from table 1, when the terminal 100 receives voltage driving signals with different magnitudes, the switch control circuit 20 controls the switch circuit 10 to be correspondingly turned on and off, and then changes the resistance value of the input port P1, and the manual control panel 200 can know the working states of the manual control panel 200, the terminal 100 and the fire-fighting equipment 300 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 a connector, a pin, a male/female, and the like, and the specific structure is selected according to the requirements.
The switch control circuit 20 correspondingly 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 use a control chip, a voltage comparison module 22 or other control modules, and the switch circuit 10 may use a switching device with a controlled on/off capability, such as a switching tube, a relay, etc., as shown in fig. 3, and in one embodiment, the switch circuit 10 includes a second electronic switching tube Q2, where an input end, an output end and a controlled end of the second electronic switching tube Q2 are an input end, an output end and a controlled end of the switch circuit 10, respectively.
The first resistive element 30 and the second resistive element 40 may employ resistive elements such as inductance, resistance, etc., as shown in fig. 3, and in one embodiment, the first resistive element 30 includes a fourth resistance R4 and the second resistive element 40 includes a fifth resistance R5.
According to the invention, the terminal 100 is formed by adopting the switch control circuit 20, the switch circuit 10, the first resistive element 30 and the second resistive element 40, the terminal 100 is connected with the manual control panel 200 through the positive input end IN+ and the negative input end IN-of the input port P1, so that the wiring cost and the wire cost are reduced, meanwhile, the voltage driving signal input by the manual control panel 200 can carry out the power-on attraction control on the relay of the fire protection device 300, the fire protection device 300 is further controlled to be electrified, after the fire protection device 300 is electrified, the second resistive element 40 is IN short circuit, the switch control circuit 20 is correspondingly controlled to be conducted by the switch circuit 10 according to the magnitude of the voltage driving signal, the resistance value of the output input port P1 is further changed, the manual control panel 200 can determine the working state of the fire protection device 300 according to the magnitude of the resistance value, the aim of monitoring the fire protection device 300 is fulfilled, and the fire protection device 300 is rapidly arranged and inspected when the fire protection device 300 works abnormally, and the safety is improved.
As shown in fig. 2, in one embodiment, the switch control circuit 20 includes a voltage sampling module 21 and a voltage comparing 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 with a signal input end of the voltage comparing module 22, and a signal output end of the voltage comparing module 22 is a control end of the switch control circuit 20;
the voltage sampling module 21 is configured to detect a voltage of the voltage driving signal and feed back the voltage to the voltage comparing 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 a 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 enable the manual control panel 200 to determine the working state of the fire protection device 300 according to the resistance value of the input port P1.
In this embodiment, the voltage sampling module 21 may be implemented by adopting a voltage transformer, a resistor divider circuit, and other structures, the voltage comparing module 22 may be implemented by adopting a comparator and a triode circuit, the voltage comparing module 22 controls the switch circuit 10 to be turned 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 be turned on when the voltage of the voltage driving signal is less than the preset voltage, and the resistance value of the input port P1 also changes correspondingly when the switch is turned off or turned on, and the manual control panel 200 can 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;
The first end of the first resistor R1 is a 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 commonly connected 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 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 Q1 are commonly connected to form a signal output end of the voltage comparison module 22, the controlled end of the first electronic switch Q1 is a signal input end of the voltage comparison module 22, and the output end of the first electronic switch Q1 is grounded.
In this embodiment, the first resistor R1 and the second resistor R2 form a resistor divider circuit, which is configured to provide a switching voltage to the first electronic switching tube Q1, the first electronic switching tube Q1 is correspondingly turned on or turned off according to the magnitude of the switching voltage, and then outputs a high-low level to the switching circuit 10, assuming that the current voltage driving signal is greater than a preset voltage, the first electronic switching tube Q1 is turned on, the first electronic switching tube Q1 outputs a low level to the second electronic switching tube Q2, the second electronic switching tube Q2 is turned off, the resistance of the input port P1 is the resistance of the relay coil of the fire-fighting equipment 300, and the resistance of the first resistor R1 and the second resistor R2 can be set in a matching manner according to the magnitude of the preset voltage, so as to meet the requirements of the switching circuit 10 on and off.
In one embodiment, the first electronic switching transistor Q1 and the second electronic switching transistor Q2 are NPN transistors.
IN one embodiment, the positive input terminal in+ and the negative input terminal IN-of the input port P1 are further connected IN parallel with a second capacitor C2 for filtering the voltage driving signal.
As shown in fig. 2, in one embodiment, the terminator 100 further includes an anti-reverse circuit 50, the anti-reverse circuit 50 being connected between the input terminal and the switching circuit 10;
The anti-reverse circuit 50 is configured to output the voltage driving signal to the switch circuit 10 in one direction, and when the polarity of the voltage driving signal input by the input port P1 is opposite, the voltage driving signal cannot be output 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 polarity change, wherein the anti-reverse circuit 50 may adopt a structure of a switch tube, a diode D1, etc., as shown in fig. 3, in one embodiment, the anti-reverse circuit 50 includes the 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.
As shown in fig. 4, the second aspect of the embodiment of the present invention provides a fire-fighting equipment 300 control device, where the fire-fighting equipment 300 control device includes a power module 400, a manual control panel 200 and a terminal 100, and the specific structure of the terminal 100 refers to the foregoing embodiment, and since the fire-fighting equipment 300 control device adopts all the technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are not described in detail herein. The output port P2 of the manual control panel 200 is connected with the input port P1 of the terminal 100, the output port P2 of the terminal 100 is connected with the relay coil of the fire-fighting device 300, the power end of the power module 400 is connected with the relay contact of the fire-fighting device 300, and the feedback port P3 of the terminal 100 is connected with the power end of the fire-fighting device 300 and is short-circuited when the fire-fighting device 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 for sequentially outputting a first voltage driving signal and a second voltage driving signal to the terminal 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 a preset voltage, and the voltage of the second voltage driving signal is less than the preset voltage;
A terminator 100 for:
Outputting the first voltage driving signal and the second voltage driving signal to the relay, and controlling the relay and the fire apparatus 300 to be powered on;
and changing the 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 the operation state of the fire fighting device 300 according to the resistance value of the input port P1.
In this embodiment, the power module 400 provides a relay working power source, which may be a dc power source or an ac power source, and according to the driving mode of the fire-fighting device 300, the manual control panel 200 outputs a voltage driving signal to make the fire-fighting device 300 relay power on and off, and the terminal 100 controls the switch circuit 10 to switch on when receiving a first preset voltage signal and controls the switch circuit 10 to switch on when receiving a second preset voltage signal, where the first preset voltage signal and the second preset voltage signal may be set correspondingly, and in one embodiment, the voltage of the first preset voltage signal is 24V, and the voltage of the second preset voltage signal is 9V, as shown in fig. 5, and according to the characteristics of the relay, after the relay acts, the relay is lower than the rated voltage for a short time, and the relay still maintains the power on state. When the manual control panel 200 outputs 24V, the switching circuit 10 is turned off, the fourth resistor R4 and the fifth resistor R5 are in an inactive state, and when the manual control panel outputs 9V for a short time, the fourth resistor R4 and the fifth resistor R5 are in an active state and are fed back to the input port P1 to change the resistance value 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 protection device 300 according to the resistance value of the input port P1.
As shown in fig. 6, in one embodiment, the manual control board 200 includes a controller 210, a sampling circuit 230 and a driving circuit 220, wherein the controller 210 is electrically connected with the driving circuit 220 and the sampling circuit 230, and the driving circuit 220 and the sampling circuit 230 are connected with a power end and a ground end of the manual control board 200, respectively;
A controller 210 for outputting a control signal to the driving circuit 220;
A driving circuit 220 for sequentially outputting 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 according to the control signal, respectively;
The sampling circuit 230 is configured to sample a current of the power source 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 terminator 100 and an operating state of the fire protection device 300 according to the current value of the current sampling signal.
In this embodiment, the controller 210 may adopt a MCU, CPU, DSP structural processor, 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 the resistance value of the input port P1 of the terminal 100 may be calculated according to the voltage driving signal and the current sampling signal output by the driving circuit 220, so as to determine the current working states of the terminal 100 and the fire-fighting equipment 300, and the connection working states with the manual control panel 200, and the controller 210 may also feed back the working states of each module to the terminal equipment of the fire-fighting control room, and the terminal equipment 6 may be a computing device such as a desktop computer, a notebook computer, a palm computer, and a cloud server.
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., and the specific structure is selected according to design requirements.
The foregoing embodiments are merely illustrative of the technical solutions of the present invention, and not restrictive, and 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 modifications may still be made to the technical solutions described in the foregoing embodiments or equivalent substitutions of some technical features thereof, and that such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A terminator, comprising a switching circuit, a switching control circuit, a first resistive element, and a second resistive element;
The input end of the switch circuit is connected with a first signal end of the switch control circuit to form a positive input end of an input port and a positive output end of an output port of the terminal, the second end of the switch circuit is connected with a first end of the first resistive element, the second end of the first resistive element is connected with a first end of the second resistive element to form a positive feedback end of a feedback port of the terminal, 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 terminal, 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 a controlled end of the switch circuit;
The input port is used for being connected with a power 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 the 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 end of the fire-fighting equipment and short-circuited when the fire-fighting equipment is electrified so as to enable the second resistive element to be short-circuited;
The switch control circuit is used for:
Detecting the voltage of the voltage driving signal, controlling the switching circuit to be turned off when the voltage of the voltage driving signal is larger than or equal to a preset voltage, and controlling the switching circuit to be turned 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 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 back the voltage to the voltage comparison module;
the voltage comparison module is used for controlling the switching circuit to be turned off when the voltage of the voltage driving signal is larger than or equal to a preset voltage, and controlling the switching circuit to be turned 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 is used for determining the working state of the fire-fighting equipment according to the resistance value of the input port.
3. The terminator of claim 2, wherein the voltage sampling module comprises a first resistor, a second resistor, and a first capacitor;
The first end of the first resistor is a 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 of claim 2, wherein the voltage comparison module comprises a third resistor and a first electronic switching tube, a first end of the third resistor is connected with the positive input end of the input port, a second end of the third resistor and the input end of the first electronic switching tube are commonly connected to form a signal output end of the voltage comparison module, a controlled end of the first electronic switching tube is a signal input end of the voltage comparison module, and an output end of the first electronic switching tube is grounded.
5. The terminator of claim 1, wherein the switching circuit comprises a second electronic switching tube having input, output and controlled ends that are the input, output and controlled ends of the switching circuit, respectively.
6. The terminator of claim 1, wherein the first resistive element comprises a fourth resistance and the second resistive element comprises a fifth resistance.
7. The terminator of claim 1, further comprising an anti-reverse circuit connected between the input and the switching circuit;
The reverse connection preventing circuit is used for outputting the voltage driving signal to the switch circuit in one direction.
8. The terminator of claim 7, wherein the anti-reverse circuit comprises a diode, an anode of the diode being connected to the input terminal, a cathode of the diode being connected to the input terminal of the switching circuit.
9. A fire-fighting equipment control device, characterized by comprising a power module, a manual control panel and the terminal device according to any one of claims 1-8;
The output port of the manual control panel is connected with the input port of the terminal, the output port of the terminal is connected with a relay coil of the fire-fighting equipment, the power end of the power module is connected with a relay contact of the fire-fighting equipment, and the feedback port of the terminal is connected with the power end of the fire-fighting equipment and is short-circuited when the fire-fighting equipment is electrified;
The power supply module is used for outputting a working power supply to the relay of the fire-fighting equipment;
The manual control panel is used for outputting a first voltage driving signal and a second voltage driving signal to the terminal device respectively 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 terminator 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 electrified;
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 disc can determine 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 comprises a controller, a sampling circuit and a driving circuit, 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 end and a ground 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 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 respectively according to the control signal;
the sampling circuit is used for sampling the current of the power end and the grounding end of the manual control panel and feeding back a current sampling signal to the controller so that the controller can determine the resistance value of the input port of the terminal and the working state of the fire-fighting equipment according to the current value of the current sampling signal.
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| CN111948570B (en) * | 2020-08-14 | 2023-06-02 | 厦门熵基科技有限公司 | Access control auxiliary input control system and line detection method |
| CN112037726A (en) * | 2020-09-09 | 2020-12-04 | 珠海格力电器股份有限公司 | Display screen drive control method, device and system and household appliance |
| CN112350712B (en) * | 2020-10-12 | 2024-07-23 | 深圳市嘉润原新显科技有限公司 | Blind-plug circuit, multi-interface electronic equipment and power supply system |
| CN114002976B (en) * | 2021-10-20 | 2023-08-11 | 许继集团有限公司 | Control detection circuit and detection method |
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| CN106803666B (en) * | 2015-11-26 | 2019-04-19 | 比亚迪股份有限公司 | Switching Power Supply control device and Switching Power Supply |
| CN106877277B (en) * | 2015-12-14 | 2019-07-23 | 北京宝沃汽车有限公司 | A kind of control relay circuit, vehicle control electronics and vehicle |
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