CN216792722U - Multi-line control system - Google Patents
Multi-line control system Download PDFInfo
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- CN216792722U CN216792722U CN202220235676.9U CN202220235676U CN216792722U CN 216792722 U CN216792722 U CN 216792722U CN 202220235676 U CN202220235676 U CN 202220235676U CN 216792722 U CN216792722 U CN 216792722U
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Abstract
A multi-line control system comprises a control device and at least one start-stop feedback device connected with the control device through a bus; the control device comprises a controller and an input display module connected with the controller, wherein the input display module is used for inputting a control instruction for controlling the linkage equipment and displaying the feedback state of the linkage equipment, and the controller is used for sending the control instruction to the corresponding start-stop feedback device and receiving the feedback state of the start-stop feedback device so as to control the display of the input display module; the start-stop feedback device is used for controlling the corresponding linkage equipment according to the control instruction, detecting the feedback state of the linkage equipment and sending the feedback state to the control device, so that the problem of too many control device lines caused by direct connection of the control device and the linkage equipment in the prior art is solved.
Description
Technical Field
The utility model relates to the field of fire alarm, in particular to a multi-line control system.
Background
A multi-line control system in a fire alarm system typically includes a control device and a controlled linkage. The control device is used for starting or stopping the linkage equipment through manual control when the fire alarm host cannot normally work due to some reason and a fire disaster manually confirmed occurs, and confirming whether the linkage equipment is normally started or stopped according to a control instruction. Usually, the control device is arranged in the fire-fighting linkage control cabinet and is far away from the installation position of the linkage equipment. The linkage equipment is fire prevention fire extinguishing apparatus such as fire pump, spray pump, induced-draft fan usually, and a large amount usually sets up in the different regions or the floor of building. Since the linkage devices cannot communicate via the bus, the control device generally needs to be directly connected to each controlled linkage device, which results in more lines to be connected to the control device and increased construction cost.
SUMMERY OF THE UTILITY MODEL
In view of the above, a multi-line control system is needed to solve the problem of excessive lines of the control device caused by the direct connection between the control device and the linkage device in the prior art.
In a first aspect, the present embodiment provides a multiline control system, which includes a control device and at least one start-stop feedback device connected to the control device through a bus; wherein,
the control device comprises a controller and an input display module connected with the controller, the input display module is used for inputting a control instruction for controlling the linkage equipment and displaying the feedback state of the linkage equipment, and the controller is used for sending the control instruction to the corresponding start-stop feedback device and receiving the feedback state of the start-stop feedback device so as to control the display of the input display module;
and the start-stop feedback device is used for controlling the corresponding linkage equipment according to the control instruction, detecting the feedback state of the linkage equipment and sending the feedback state to the control device.
In a further embodiment, the input display module comprises at least one display control circuit corresponding to the start-stop feedback device, and the display control circuit is connected with the controller; the display control circuit comprises a display circuit used for displaying a feedback signal according to the feedback state and an input circuit used for inputting a control signal to generate the control instruction.
In a further embodiment, the input display module further comprises an input driving circuit for driving the control signal and a display driving circuit for driving the feedback signal, the input driving circuit and the display driving circuit being connected to the controller; the input driving circuit is connected with the input circuit, and the display driving circuit is connected with the display circuit.
In a further embodiment, the display driving circuit includes a controllable switch and a first resistor, a control terminal of the controllable switch is connected to the feedback signal input terminal and one terminal of the first resistor, a first terminal of the controllable switch is connected to a power supply terminal and the other terminal of the first resistor, and a second terminal of the controllable switch is connected to the display circuit.
In a further embodiment, the input driving circuit includes a second resistor and a third resistor, one end of the second resistor is connected to the control signal output terminal, the other end of the second resistor is connected to one end of the third resistor and the input circuit, and the other end of the third resistor is connected to a power supply terminal.
In a further embodiment, the display control circuit includes a fourth resistor, the input circuit includes a key, and the display circuit includes an indicator light; one end of the key is connected with the input driving circuit, and the other end of the key is connected with one end of the fourth resistor; the indicating lamp is a light emitting diode, the anode of the light emitting diode is connected with the display driving circuit, and the cathode of the light emitting diode is connected with one end of the fourth resistor; the other end of the fourth resistor is connected with the controller.
In a further embodiment, the control device further comprises a bus communication module connected with the controller, and the bus communication module comprises at least one interface protection circuit for protecting the controller from the influence of bus signal abnormal input.
In a further embodiment, the interface protection circuit includes a filter FIL1 and thermistors RT1 and RT2, the first end of the filter FIL1 is connected to the first end of the bus signal, the second end of the filter FIL1 is connected to the second end of the bus signal, the third end of the filter FIL1 is connected to one end of the thermistors RT1, the fourth end of the filter FIL1 is connected to one end of the thermistors RT2, the other end of the thermistors RT1 is connected to the first end of the start-stop feedback device, and the other end of the thermistors RT2 is connected to the second end of the start-stop feedback device.
In a further embodiment, the interface protection circuit further includes capacitors C1, C2, C3, C4, C5, C6, C7, diodes D1, D2, D3, D25, D26, D27; one end of each of the capacitors C3 and C4 is connected to the first end of the filter FIL1, the other end of each of the capacitors C3 and C4 is connected to the second end of the filter FIL1, one end of the capacitor C1 is connected to the first end of the filter FIL1, the other end of the capacitor C1 is grounded, one end of the capacitor C6 is connected to the second end of the filter FIL1, the other end of the capacitor C6 is grounded, one end of the capacitor C5 is connected to the third end of the filter FIL1, the other end of the capacitor C5 is connected to the fourth end of the filter FIL1, one end of the capacitor C2 is connected to the fourth end of the filter FIL1, the other end of the capacitor C2 is grounded, one end of the capacitor C7 is connected to the third end of the filter FIL1, and the other end of the capacitor C7 is grounded; one end of the diode D2 is connected with the third end of the filter FIL1, the other end of the diode D2 is connected with the fourth end of the filter FIL1, one end of the diode D3 is connected with the third end of the filter FIL1, and the other end of the diode D3 is grounded; one end of the diode D1 is connected with the fourth end of the filter FIL1, and the other end of the diode D1 is grounded; one end of the diode D26 is connected with the first end of the start-stop feedback device, the other end of the diode D26 is connected with the second end of the start-stop feedback device, one end of the diode D25 is connected with the first end of the start-stop feedback device, and the other end of the diode D25 is grounded; one end of the diode D27 is connected with the second end of the start-stop feedback device, and the other end of the diode D27 is grounded.
In a further embodiment, the start-stop feedback device comprises a main control unit, and a detection module and a switch module which are connected with the main control unit; wherein,
the detection module is connected with the linkage equipment and used for detecting the feedback state of the linkage equipment and sending the feedback state to the main control unit;
the switch module is connected with the linkage equipment and used for starting or stopping the linkage equipment according to the control instruction;
and the main control unit is used for receiving the control instruction, sending the control instruction to the switch module and sending the feedback state to the control device.
The multi-line control system comprises at least one start-stop feedback device, a controller and an input display module, wherein the start-stop feedback device is connected with the control device through a bus, the start-stop feedback device is correspondingly connected with linkage equipment, the control device is provided with the controller and the input display module, a control instruction is input into the input display module and is sent to the start-stop feedback device through the bus, the start-stop feedback device controls the corresponding linkage equipment according to the control instruction, the feedback state of the linkage equipment is detected, the feedback state is sent to the control device through the bus, the feedback state is displayed in the input display module, the control device can control the start or the stop of the linkage equipment without being directly connected with the linkage equipment, the feedback state of the linkage equipment is confirmed, and the problem that the number of lines of the control device is too large due to the fact that the control device is directly connected with the linkage equipment in the prior art is solved.
Drawings
FIG. 1 is a schematic diagram of a multi-wire control system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a connection between a controller and an input display module according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an input display module including a driving circuit and a controller according to an embodiment of the present application;
FIG. 4 is a circuit diagram of an input display module according to an embodiment of the present application;
fig. 5 is a circuit diagram of an interface protection circuit according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only. The terms "first" and "second" are used merely for distinguishing between component names and do not denote any order.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. The embodiments of the present invention are described in detail with reference to the drawings, and for convenience of illustration, the drawings showing the partial structure of the device are not enlarged partially according to the general scale, and the drawings are only examples, which should not limit the scope of the present invention.
The multi-line control system provided by the embodiment of the utility model is further described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a multi-line control system according to an embodiment of the utility model. The multiline control system comprises a control device 11 and at least one start-stop feedback device 12, the number of the start-stop feedback devices 12 shown in fig. 1 being 2. Those skilled in the art will appreciate that the number of start stop feedback devices 12 shown in FIG. 1 is merely illustrative, and that feedback devices 12 may include a greater or lesser number than shown in FIG. 1. The control device 11 and the start-stop feedback device 12 are connected through a bus.
The control device 11 comprises a controller 14 and an input display module 13 connected with the controller 14, the input display module 13 is used for inputting a control instruction for controlling the linkage equipment and displaying a feedback state of the linkage equipment, and the controller 14 is used for sending the control instruction to the corresponding start-stop feedback device 12 and receiving the feedback state of the start-stop feedback device 12 to control the display of the input display module 13; the start-stop feedback device 12 is configured to control the corresponding linkage device according to the control instruction, detect a feedback state of the linkage device, and send the feedback state to the control device 11.
The control device 11 communicates with the start-stop feedback device 12 through a bus, which may be a fire-fighting bus or other bus capable of performing master-slave device communication. The number of the start-stop feedback devices 12 is only required to meet the control requirement of the linkage equipment and the bus communication requirement, and is not limited herein. The start-stop feedback device 12 is correspondingly connected with the linkage devices, generally in a one-to-one correspondence, and one start-stop feedback device 12 may be used to control a plurality of linkage devices.
When the control device 11 needs to activate or deactivate the corresponding linkage device, a control command corresponding to a specific linkage device or devices, typically an on or off command, is input through the input display module 13 and sent to the controller 14. The input display module can perform input by using an input device such as an operation button, a key, a switch, a keyboard, and the like. After receiving the control instruction, the controller 14 communicates with the corresponding start-stop feedback device 12 through the bus, and sends the control instruction to the corresponding start-stop feedback device 12, where the control instruction includes identification information of the linkage device and a command for turning on or off. After receiving the control instruction, the start-stop feedback device 12 controls the corresponding linkage device to be turned on or turned off, and the control mode may be to control a power supply source or a power supply path of the linkage device.
The start-stop feedback device 12 can also detect the feedback state of the linkage equipment, wherein the feedback state can be normal, short circuit or open circuit, and the detection method can be to detect the load voltage of the linkage equipment or the on-off condition of the working circuit of the linkage equipment. After the start-stop feedback device 12 finishes detection, a feedback state is sent to the control device 11 through the bus, the controller 14 sends a corresponding signal to the input display module 13 according to the feedback state, and the input display module 13 displays the feedback state to provide feedback information whether the linkage equipment works normally for a controller. For example, the feedback information may be displayed by an indicator lamp formed of a light emitting diode, or may be displayed by a liquid crystal panel, a display, or the like. In addition, the input display module 13 may also display feedback information corresponding to the control instruction, where the feedback information is obtained by the controller 14 according to the control instruction, rather than according to the feedback state of the linkage device, and the feedback information may directly display the current control instruction corresponding to the linkage device for the control personnel. Such as showing that a linkage is currently active or off.
The control device 11 may also communicate with a control host of the fire protection system, for example, by way of a serial port, and the like, and cooperate with the control host to issue a configuration instruction to the start/stop feedback device 12, for example, to configure whether the start/stop feedback device 12 detects a line, whether to detect feedback, and the like, so as to achieve personalized customization, so as to meet the use requirements of different scenes. In addition, the control device 11 sets the enable/disable input function, when the input function is in the enable state, all the input devices are enabled, and the control instruction can be input through the corresponding input device; when the input function is in the disabled state, all the input devices are disabled, preventing human misoperation during the operation of the control device 11.
The controller 14 may be an operation and control device such as an MCU, a single chip microcomputer, an FPGA, etc., in this embodiment, the single chip microcomputer is used as the controller, and the model is huada L170.
In the multi-line control system provided by the embodiment, the control device 11 is communicated with at least one start-stop feedback device 12 through a bus, and the start-stop feedback device 12 is electrically connected with corresponding linkage equipment. The control device 11 inputs a control instruction through the input display module 13, the start-stop feedback device 12 controls the linkage equipment to be started or shut down according to the control instruction, the feedback state of the linkage equipment is detected, the feedback state is sent to the control device 11 and displayed, the control device 11 can control the linkage equipment to be started or shut down without being directly connected with the linkage equipment, the feedback state of the linkage equipment is confirmed, and the problem that the number of lines of the control device is too large due to the fact that the control device is directly connected with the linkage equipment in the prior art is solved.
In some embodiments, fig. 2 is a schematic diagram of a connection between a controller and an input display module according to an embodiment of the present application. Referring to fig. 2, the input display module 13 includes at least one display control circuit 131 corresponding to the start/stop feedback device 12, and the display control circuit is connected to the controller 14; the display control circuit 131 includes a display circuit 132 for displaying a feedback signal according to a feedback state and an input circuit 133 for inputting a control signal to generate a control instruction. Those skilled in the art will appreciate that the number of display control circuits 131, display circuits 132, and input circuits 133 shown in fig. 2 is merely illustrative, and that the number of display control circuits 131, display circuits 132, and input circuits 133 may also include a greater or lesser number than shown in fig. 2. The number of the display control circuits 131 is related to the number of the start-stop feedback devices 12, and may be one-to-one, or one display control circuit 131 corresponds to a plurality of start-stop feedback devices 12. The number of the display circuits 132 and the input circuits 133 corresponds to the number of the control signals and the feedback signals.
The controller 14 is connected to the display control circuit 131 to receive a control signal of the input circuit 133 and to send a feedback signal to the display circuit. In the case that the display control circuits 131 correspond to the start-stop feedback devices 12 one-to-one, and the number of the display control circuits is large, the controller 14 needs to use a plurality of ports to receive the control signals and transmit the feedback signals. For example, in the case where the number of the display control circuits 131 is 8, assuming that each display control circuit 131 includes 2 input circuits and 4 display circuits, the controller needs 48 ports for receiving and transmitting signals, which consumes a lot of port resources. In this case, the controller 14 may enable each display control circuit 131 by an enable signal, and realize multiplexing of ports. For example, the controller 14 may use 8 ports to implement enabling of the corresponding display control circuit 131, and then use 6 ports to implement receiving and sending of the control signal and the feedback signal, and use 14 ports in total, thereby greatly saving port resources.
In some embodiments, fig. 3 is a schematic diagram of connection between an input display module including a driving circuit and a controller according to an embodiment of the present disclosure. Referring to fig. 3, the input display module 13 further includes an input driving circuit 135 for driving the control signal and a display driving circuit 134 for driving the feedback signal. Wherein, the input drive circuit 135 and the display drive circuit 134 are connected with the controller 14; the input driving circuit 135 is connected to the input circuit 133, and the display driving circuit 134 is connected to the display circuit 132. Those skilled in the art will appreciate that the number of display driver circuits 134 and input driver circuits 135 shown in fig. 3 is merely illustrative, and that display driver circuits 134 and input driver circuits 135 may also include a greater or lesser number than those shown in fig. 3, wherein the number of display driver circuits 134 corresponds to the number of feedback signals and the number of input driver circuits 135 corresponds to the number of control signals.
When the input circuit 133 inputs or does not input the control signal, the level of the control signal is maintained at a low level or a high level by the input driving circuit 135 and transmitted to the controller 14, and the controller 14 determines whether the control signal corresponding to the linkage device is input according to the level of the control signal. When the controller 14 sends a feedback signal to the display circuit 132, the level of the feedback signal is converted into a voltage for lighting an indicator light or other display device by the display driving circuit 134 to ensure the normal operation of the display circuit.
In the case where the controller 14 enables the plurality of display control circuits 131 by the enable signal, one display drive circuit 134 may be connected to the corresponding display circuit 132 of the plurality of display control circuits 131, and one input drive circuit 135 may be connected to the corresponding input circuit 133 of the plurality of display control circuits 131, so that the plurality of display control circuits 131 share the control signal and the feedback signal.
In some embodiments, fig. 4 is a circuit connection diagram of an input display module according to an embodiment of the present application. Referring to FIG. 4, the display driving circuit 134 includes a controllable switch M1 and a first resistor R26. In this embodiment, the controllable switch M1 is a MOS transistor. A control end of the controllable switch M1 is connected to the feedback signal input end LED _ R2 and one end of the first resistor R26, a first end of the controllable switch M1 is connected to the power supply terminal VCC and the other end of the first resistor R26, and a second end of the controllable switch M1 is connected to the display circuit 132.
The input driving circuit 135 includes a second resistor R24 and a third resistor R25, one end of the second resistor R24 is connected to the control signal output terminal KEY _ R1, the other end of the second resistor R24 is connected to one end of the third resistor R25 and the input circuit 133, and the other end of the third resistor R25 is connected to the power supply terminal VCC.
Fig. 4 also includes 4 display control circuits 131, and each display control circuit 131 includes 1 display circuit 132 and 1 input circuit 133. It is to be understood that the number of the display control circuits 131, the display circuits 132, and the input circuits 133 shown in fig. 4 is merely illustrative, and a greater or lesser number than that shown in fig. 4 may be included. Each display control circuit 131 includes a fourth resistor R1, the input circuit 133 includes a key K1, and the display circuit 132 includes an indicator light D1; one end of the key K1 is connected with the input drive circuit 135, and the other end is connected with one end of the fourth resistor R1; the indicator light in this embodiment is a light emitting diode D1, the anode of the light emitting diode D1 is connected to the display driving circuit 134, and the cathode of the light emitting diode D1 is connected to one end of the fourth resistor R1; the other end of the fourth resistor R1 is connected to an enable signal terminal LED & KEY _ C of the controller 14.
The enable signal is active low, and the controller 14 controls the enable signal corresponding to each display control circuit 131 to be active low in turn. When the enable signal of one of the display control circuits 131 is low, the enable signals of the other display control circuits 131 are high. The low level is maintained for a period of time to enable the control signal and the feedback signal corresponding to the display control circuit 131. The interval enable time of the display control circuit 131 is typically in the order of milliseconds or microseconds.
When the enable signal of the display control circuit 131 is at low level, if the corresponding start-stop feedback device 12 has feedback information to display, the controller 14 sends a corresponding feedback signal LED _ R2, and the signal is active at low level. The controllable switch M1 is a P-channel MOS transistor, the voltage difference Vgs between the gate and the source of the P-channel MOS transistor reaches the on condition, the M1 is turned on, the display driving circuit 134 outputs a high-level signal, the voltage of the anode of the light emitting diode D1 is VCC, the cathode of the light emitting diode D1 is connected to the low-level LED & KEY _ C through the current limiting resistor R1, and the light emitting diode D1 emits light due to the forward voltage difference between the two ends. When no feedback signal is input, the voltage of the feedback signal input end LED _ R2 is substantially the same as the voltage of the power supply end VCC, the voltage difference Vgs between the gate and the source of the controllable switch M1 is small, the controllable switch M1 is turned off, and the display driving circuit 134 does not output. The VCC voltage may be + 3.3V.
When the enable signal of the display control circuit 131 is at a low level, if the KEY K1 in the input circuit is pressed at this time, the first terminal and the second terminal of the KEY K1 are turned on, and the control signal KEY _ R1 is at a low level and is sent to the controller 14 through the first resistor R24; the controller 14 determines the corresponding display control circuit 131 and the corresponding control command through the control signal KEY _ R1 and the enable signal LED & KEY _ C. When there is no input, the control signal KEY _ R1 gets a high level through a path with the first resistor R24, the second resistor R25, and the power source terminal VCC, and is transmitted to the controller 14.
When the enable signal of the display control circuit 131 is at a high level, even if the corresponding feedback signal is at a low level at this time to turn on the controllable switch M1, the indicator cannot be turned on because there is no voltage difference between the two ends of the light emitting diode D1. Similarly, when the KEY K1 is pressed to turn on, the control signal KEY _ R1 is asserted to be high.
In some embodiments, the control device 11 further comprises a bus communication module connected to the controller 14, the bus communication module comprising at least one interface protection circuit for protecting the controller 14 from abnormal input of bus signals.
The control device 11 communicates with the start/stop feedback device 12 through a bus, and a bus signal is affected by various factors such as a wiring error, a short circuit, and electromagnetic interference, so that an abnormally high voltage or current may occur, and if the bus signal is not protected, the controller 14 may be damaged. Interface protection circuits typically protect the main devices from abnormal voltage or current surges through current limiting and voltage clamping designs. The number of interface protection circuits is related to the number of start-stop feedback devices 12, and typically the number of interface protection circuits is equal to the number of start-stop feedback devices 12 controlled by the control device 11.
In some embodiments, fig. 5 is a circuit connection diagram of an interface protection circuit of an embodiment of the present application. Referring to fig. 5, the interface protection circuit includes a filter FIL1, thermistors RT1, RT2, capacitors C1, C2, C3, C4, C5, C6, C7, diodes D1, D2, D3, D25, D26, and D27; the first end of filter FIL1 connects the first end BUS _1_ N of BUS signal, and BUS signal second end BUS _1_ P is connected to filter FIL1 second end, and thermistor RT1 one end is connected to filter FIL1 third end, and thermistor RT2 one end is connected to filter FIL1 fourth end, and the first end BUS _ N of BUS output is connected to the thermistor RT1 other end, and BUS output second end BUS _ P is connected to the thermistor RT2 other end.
One ends of capacitors C3 and C4 are connected with a first end of a filter FIL1, the other ends of capacitors C3 and C4 are connected with a second end of a filter FIL1, one end of a capacitor C1 is connected with a first end of a filter FIL1, the other end of the capacitor C1 is grounded, one end of a capacitor C6 is connected with a second end of a filter FIL1, the other end of a capacitor C6 is grounded, one end of a capacitor C5 is connected with a third end of the filter FIL1, the other end of a capacitor C5 is connected with a fourth end of the filter FIL1, one end of a capacitor C2 is connected with a fourth end of the filter FIL1, the other end of the capacitor C2 is grounded, one end of a capacitor C7 is connected with a third end of the filter FIL1, and the other end of a capacitor C7 is grounded; one end of a diode D2 is connected with the third end of the filter FIL1, the other end of a diode D2 is connected with the fourth end of the filter FIL1, one end of a diode D3 is connected with the third end of the filter FIL1, and the other end of the diode D3 is grounded; one end of the diode D1 is connected with the fourth end of the filter FIL1, and the other end of the diode D1 is grounded; one end of a diode D26 is connected with a first BUS output end BUS _ N, the other end of a diode D26 is connected with a second BUS start output end BUS _ P, one end of a diode D25 is connected with the first BUS output end BUS _ N, and the other end of a diode D25 is grounded; one end of the diode D27 is connected to the second BUS output terminal BUS _ P, and the other end of the diode D27 is grounded.
The filter FIL1 in the interface protection circuit is an EMI filter and is combined with the capacitors C1-C7 to play a role in inhibiting high-frequency interference. Diodes D1, D2, D3, D25, D26 and D27 are TVS transient suppression diodes and play a role in preventing surge. When the bus is abnormally short-circuited and the current of the thermistors RT1 and RT2 is increased, the thermistors RT1 and RT2 increase the resistance and play a role in current limiting protection.
In some embodiments, the start-stop feedback device 12 includes a main control unit, and a detection module and a switch module connected to the main control unit; the detection module is connected with the linkage equipment and used for detecting the feedback state of the linkage equipment and sending the feedback state to the main control unit; the switch module is connected with the linkage equipment and used for starting or stopping the linkage equipment according to the control instruction; the main control unit is used for receiving the control instruction, sending the control instruction to the switch module, and sending the feedback state to the control device 11.
The start-stop feedback device 12 is directly and electrically connected with the linkage equipment, the switch module is connected with a power supply circuit of the linkage equipment, and the power supply circuit of the linkage equipment is controlled to be switched on or switched off through a switch device such as a relay and a controllable switch according to a control instruction. The detection module is usually connected in series with a load circuit of the linkage device, determines whether the linkage device has a fault such as a short circuit or an open circuit through the change of the current in the load circuit, and sends the feedback information of normal or fault to the control device 11 through the bus.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The multi-line control system is characterized by comprising a control device and at least one start-stop feedback device connected with the control device through a bus; wherein,
the control device comprises a controller and an input display module connected with the controller, the input display module is used for inputting a control instruction for controlling the linkage equipment and displaying the feedback state of the linkage equipment, and the controller is used for sending the control instruction to the corresponding start-stop feedback device and receiving the feedback state of the start-stop feedback device so as to control the display of the input display module;
and the start-stop feedback device is used for controlling the corresponding linkage equipment according to the control instruction, detecting the feedback state of the linkage equipment and sending the feedback state to the control device.
2. The multi-wire control system according to claim 1, wherein the input display module comprises at least one display control circuit corresponding to the start/stop feedback device, and the display control circuit is connected to the controller; the display control circuit comprises a display circuit used for displaying a feedback signal according to the feedback state and an input circuit used for inputting a control signal to generate the control instruction.
3. The multi-wire control system of claim 2, wherein the input display module further comprises an input drive circuit for driving the control signal and a display drive circuit for driving the feedback signal, the input drive circuit and the display drive circuit being connected to the controller; the input driving circuit is connected with the input circuit, and the display driving circuit is connected with the display circuit.
4. The multi-wire control system according to claim 3, wherein the display driving circuit comprises a controllable switch and a first resistor, wherein a control terminal of the controllable switch is connected to the feedback signal input terminal and one terminal of the first resistor, a first terminal of the controllable switch is connected to a power supply terminal and the other terminal of the first resistor, and a second terminal of the controllable switch is connected to the display circuit.
5. The multi-wire control system according to claim 3, wherein the input driving circuit comprises a second resistor and a third resistor, one end of the second resistor is connected to the control signal output terminal, the other end of the second resistor is connected to one end of the third resistor and the input circuit, and the other end of the third resistor is connected to a power supply terminal.
6. The multi-wire control system of claim 3, wherein the display control circuit comprises a fourth resistor, the input circuit comprises a key, and the display circuit comprises an indicator light; one end of the key is connected with the input driving circuit, and the other end of the key is connected with one end of the fourth resistor; the indicating lamp is a light emitting diode, the anode of the light emitting diode is connected with the display driving circuit, and the cathode of the light emitting diode is connected with one end of the fourth resistor; the other end of the fourth resistor is connected with the controller.
7. The multi-wire control system of claim 1, wherein the control device further comprises a bus communication module coupled to the controller, the bus communication module including at least one interface protection circuit for protecting the controller from bus signal anomaly inputs.
8. The multi-wire control system according to claim 7, wherein the interface protection circuit comprises a filter FIL1 and thermistors RT1 and RT2, a first end of the filter FIL1 is connected with a first end of the bus signal, a second end of the filter FIL1 is connected with a second end of the bus signal, a third end of the filter FIL1 is connected with one end of the thermistors RT1, a fourth end of the filter FIL1 is connected with one end of the thermistors RT2, the other end of the thermistors RT1 is connected with a first end of the start-stop feedback device, and the other end of the thermistors RT2 is connected with a second end of the start-stop feedback device.
9. The multi-wire control system of claim 8, wherein the interface protection circuit further comprises capacitors C1, C2, C3, C4, C5, C6, C7, diodes D1, D2, D3, D25, D26, D27; one end of each of the capacitors C3 and C4 is connected to the first end of the filter FIL1, the other end of each of the capacitors C3 and C4 is connected to the second end of the filter FIL1, one end of the capacitor C1 is connected to the first end of the filter FIL1, the other end of the capacitor C1 is grounded, one end of the capacitor C6 is connected to the second end of the filter FIL1, the other end of the capacitor C6 is grounded, one end of the capacitor C5 is connected to the third end of the filter FIL1, the other end of the capacitor C5 is connected to the fourth end of the filter FIL1, one end of the capacitor C2 is connected to the fourth end of the filter FIL1, the other end of the capacitor C2 is grounded, one end of the capacitor C7 is connected to the third end of the filter FIL1, and the other end of the capacitor C7 is grounded; one end of the diode D2 is connected with the third end of the filter FIL1, the other end of the diode D2 is connected with the fourth end of the filter FIL1, one end of the diode D3 is connected with the third end of the filter FIL1, and the other end of the diode D3 is grounded; one end of the diode D1 is connected with the fourth end of the filter FIL1, and the other end of the diode D1 is grounded; one end of the diode D26 is connected with the first end of the start-stop feedback device, the other end of the diode D26 is connected with the second end of the start-stop feedback device, one end of the diode D25 is connected with the first end of the start-stop feedback device, and the other end of the diode D25 is grounded; one end of the diode D27 is connected with the second end of the start-stop feedback device, and the other end of the diode D27 is grounded.
10. The multi-wire control system according to any one of claims 1 to 9, wherein the start/stop feedback device comprises a main control unit, and a detection module and a switch module connected with the main control unit; wherein,
the detection module is connected with the linkage equipment and used for detecting the feedback state of the linkage equipment and sending the feedback state to the main control unit;
the switch module is connected with the linkage equipment and used for starting or stopping the linkage equipment according to the control instruction;
and the main control unit is used for receiving the control instruction, sending the control instruction to the switch module and sending the feedback state to the control device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220235676.9U CN216792722U (en) | 2022-01-26 | 2022-01-26 | Multi-line control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220235676.9U CN216792722U (en) | 2022-01-26 | 2022-01-26 | Multi-line control system |
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