CN110646644B - Expansion connector, detection system and detection method - Google Patents
Expansion connector, detection system and detection method Download PDFInfo
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- CN110646644B CN110646644B CN201910951713.9A CN201910951713A CN110646644B CN 110646644 B CN110646644 B CN 110646644B CN 201910951713 A CN201910951713 A CN 201910951713A CN 110646644 B CN110646644 B CN 110646644B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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Abstract
The invention discloses an expansion connector, a detection system and a detection method, and relates to the technical field of detection. The expansion connector includes: the first end part is used for connecting the controller and getting power from the controller and comprises a signal output terminal; and a second end portion for connecting and supplying power to the connected detector and acquiring a detection signal from the detector, including a signal input terminal, wherein a signal output terminal of the first end portion is connected with a signal input terminal of the second end portion; wherein the first end part or the second end part is provided with more than two branch ends. Therefore, the number of independent components adopted in the detection process is reduced, and the deployment complexity in the detection process is reduced.
Description
Technical Field
The invention relates to the technical field of detection, in particular to an expansion connector, a detection system and a detection method.
Background
Various detectors are often used in industrial settings. Each detector is connected to the signal input point by a quick connector connecting line. The number of lines of the quick connector is generally from two lines to five lines.
In the related art, a detector is used to be placed at a detection position to obtain a detection signal, and a controller of a processing system is used to determine a detection result based on the obtained detection signal. When N (N is a positive integer) detection positions need to be detected or when N independent controllers need to acquire detection signals, N quick connector connecting lines and N power supply lines need to be used, and N interfaces of the controllers are used.
Disclosure of Invention
After the inventor analyzes, the related art needs a large number of independent components when being deployed, and the deployment is complex.
The embodiment of the invention aims to solve the technical problem that: how to reduce the deployment complexity in the detection process.
According to a first aspect of some embodiments of the present invention, there is provided an expansion connector comprising: the first end part is used for connecting the controller and getting power from the controller and comprises a signal output terminal; and a second end portion for connecting and supplying power to the connected detector and acquiring a detection signal from the detector, including a signal input terminal, wherein a signal output terminal of the first end portion is connected with a signal input terminal of the second end portion; wherein the first end part or the second end part is provided with more than two branch ends.
In some embodiments, in the case where the first end portion has two or more branch ends, the second end portion includes a signal input terminal and a power supply output terminal; one branch end of the first end portion includes a power input terminal and a signal output terminal, and the other branch ends include signal output terminals, wherein the power input terminal is connected with the power output terminal of the second end portion, and each signal output terminal is connected with the signal input terminal of the second end portion.
In some embodiments, in the case where the first end portion has more than two branch ends, at least one branch end of the first end portion is connected with the second end portion of the other expansion connector so as to be connected with the controller through the other expansion connector.
In some embodiments, in a case where the second end portion has two or more branch ends, each branch end of the second end portion includes a power output terminal and a signal input terminal, wherein each power output terminal is connected with the power input terminal of the first end portion, and each signal input terminal is connected with the signal output terminal of the first end portion.
In some embodiments, in the case where the second end portion has more than two branch ends, at least one branch end of the second end portion is connected with the first end portion of the other extension connector so as to be connected with the detector through the other extension connector.
In some embodiments, the controller is a programmable logic controller, PLC.
According to a second aspect of some embodiments of the present invention there is provided a detection system comprising: any of the aforementioned expansion connectors; a controller connected to a first end of the expansion connector; and a detector connected with the second end of the expansion connector.
According to a third aspect of some embodiments of the present invention, there is provided a detection method, including: the expansion connector obtains electricity through a first end part of the expansion connector, wherein the first end part is connected with the controller and comprises a signal output terminal; the extension connector supplies power to the detector connected with the second end part through the second end part of the extension connector, wherein the second end part comprises a signal input terminal, and a signal output terminal of the first end part is connected with the signal input terminal of the second end part; a signal input terminal of the second end of the extension connector acquires a detection signal of a corresponding detector; the signal output terminal of the first end part of the expansion connector sends the acquired detection signal to the controller; wherein the first end part or the second end part is provided with more than two branch ends.
In some embodiments, in the case where the first end portion has two or more branch ends, the second end portion includes a signal input terminal and a power supply output terminal; one branch end of the first end part comprises a power input terminal and a signal output terminal, and the other branch ends comprise signal output terminals, wherein the power input terminal is connected with the power output terminal of the second end part, and each signal output terminal is connected with the signal input terminal of the second end part; the extension connector takes power through a branch end with a power input terminal in a first end part of the extension connector; the signal output terminal of each branch terminal in the first end portion of the extension connector transmits the acquired detection signal to the corresponding controller.
In some embodiments, in a case where the second end portion has two or more branch ends, each branch end of the second end portion includes a power output terminal and a signal input terminal, wherein each power output terminal is connected with the power input terminal of the first end portion, and each signal input terminal is connected with the signal output terminal of the first end portion; the extension connector supplies power to the detector connected with the branch end through each branch end of the second end part of the extension connector; a signal input terminal of each branch end of the second end part of the extension connector acquires a detection signal of a corresponding detector; the signal output terminal of the first end portion of the extension connector transmits the acquired detection signal to the corresponding controller.
Some embodiments of the above invention have the following advantages or benefits: for a scene with one input and multiple outputs or a scene with multiple inputs and one output, a plurality of quick connectors and connecting wires do not need to be deployed, and only the expansion connector provided by the invention needs to be adopted to connect the controller and the detector. Therefore, the number of independent components adopted in the detection process is reduced, and the deployment complexity in the detection process is reduced.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an expansion connector according to some embodiments of the present invention.
Fig. 2 is a schematic diagram of an expansion connector according to further embodiments of the present invention.
FIG. 3 is a schematic diagram of a scenario in which multiple expansion connectors are used, according to some embodiments of the invention.
Fig. 4 is a schematic diagram of an expansion connector according to further embodiments of the present invention.
FIG. 5 is a schematic diagram of a scenario in which multiple expansion connectors are used according to further embodiments of the present invention.
FIG. 6 is a schematic diagram of a detection system according to some embodiments of the invention.
FIG. 7 is a schematic diagram of a detection system according to further embodiments of the present invention.
FIG. 8 is a flow chart illustrating a detection method according to some embodiments of the invention.
FIG. 9 is a flow chart illustrating a detection method according to further embodiments of the present invention.
FIG. 10 is a flow chart illustrating a detection method according to further embodiments of the present invention.
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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
After further analysis, the inventor finds that in part of scenes, more than two detection positions need to be detected by the same processor, and for the detection results of the detection positions, the processor only needs to give out 'none' or 'any existence'; in other partial scenarios, more than two independent processors need to use detection signals acquired from the same detection location. Aiming at least two scenes, the invention can provide a solution which is easier to deploy and saves the deployed devices.
An embodiment of the present invention provides an expansion connector, including: the first end part is used for connecting the controller and getting power from the controller and comprises a signal output terminal; and a second end portion for connecting and supplying power to the connected detector and acquiring a detection signal from the detector, including a signal input terminal, wherein a signal output terminal of the first end portion is connected with a signal input terminal of the second end portion; wherein the first end part or the second end part is provided with more than two branch ends.
In some embodiments, the detector generates the detection signal when a preset detection result is acquired, and does not generate the detection signal when the preset detection result is not acquired. For example, a detector for detecting whether the door is open may generate a detection signal when the door is open, and a detector for detecting whether there is cargo on the shelf may generate a detection signal when there is no cargo on the shelf.
FIG. 1 is a schematic diagram of an expansion connector according to some embodiments of the present invention. As shown in fig. 1, the expansion connector 10 of this embodiment includes an end portion 110 and an end portion 120, wherein the end portion 110 has a branch end 1110 and a branch end 1120. More branch ends may be provided at the end 110 as desired, and are not described in detail herein.
The branch end 1110 has a signal terminal 1111 therein, the branch end 1120 has a signal terminal 1121 therein, and the end 120 has a signal terminal 1201 therein. The signal terminals 1111 and 1121 are connected to the signal terminal 1201.
In some embodiments, end 110 is a first end and end 120 is a second end. At this time, the expansion connector 10 may be used to connect a plurality of controllers, or a plurality of interfaces for connecting one or more controllers, for example. In some embodiments, the Controller is a Programmable Logic Controller (PLC).
In some embodiments, end 110 is a second end and end 120 is a first end. In this case, the extension connector 10 may be used to connect a plurality of detectors, for example. In some embodiments, the detector may determine whether to generate a detection signal according to the detection result. For example, the detector may generate a first detection result when the detector generates the detection signal and a second detection result when the detector does not generate the detection signal.
Thus, embodiments of the present invention may be applied to a variety of scenarios. In a scenario of one input, multiple outputs, the states of the respective outputs are consistent, e.g., all output detection signals, or none output detection signals; in a scenario of a plurality of inputs and one output, the output is the result of or operation on the plurality of inputs, for example, if any one input has a detection signal, the detection signal is output, and if none of the inputs has a detection signal, the detection signal is not output. For the above-mentioned scenario of one input, multiple outputs or multiple inputs and one output, there is no need to deploy multiple quick connectors and connecting wires, but only the extended connector provided by the above-mentioned embodiment needs to be used to connect the controller and the detector. Therefore, the number of independent components adopted in the detection process is reduced, and the deployment complexity in the detection process is reduced.
An embodiment in which the first end portion of the expansion connector has more than two branch ends is described below with reference to fig. 2 and 3.
Fig. 2 is a schematic diagram of an expansion connector according to further embodiments of the present invention. As shown in fig. 2, the expansion connector 20 of this embodiment includes a first end 210 and a second end 220. The first branch end 2110 of the first end portion 210 includes a power input terminal 2111 and a signal output terminal 2112; the second branch end 2120 includes a signal output terminal 2122 and does not include a power input terminal or includes a power input terminal to which a line is not connected to avoid damage to a power supply. Accordingly, the expansion connector 20 receives power through the first branch terminal 2110. The second end 220 includes a signal input terminal 2202 and a power output terminal 2201. The branch end of the first end portion may be provided in plural as necessary, and is not shown in fig. 2.
The signal input terminal 2202 is connected to the signal output terminal 2112 and the signal output terminal 2122. The power input terminal 2111 of the first branch terminal 2110 is connected to the power output terminal 2201 of the second end portion.
By the embodiment, the detection scene of one input and multiple outputs can be realized, and a plurality of quick connectors and connecting wires are not required to be deployed.
FIG. 3 is a schematic diagram of a scenario in which multiple expansion connectors are used, according to some embodiments of the invention. As shown in fig. 3, there are three separate controllers 34, 35, 36 in this scenario, and it is necessary to acquire the detection signals of the same detector 37 for separate processing. At this time, two expansion connectors may be employed, and the first end portion of each expansion connector includes two branch ends.
The first expansion connector 31 includes a first end portion including a first branch end 3110 and a second branch end 3120 and a second end portion 320; the second expansion connector 33 includes a first end portion including a first branch end 3310 and a second branch end 3320 and a second end portion 340. The second end 320 of the first extension connector 31 is connected to a detector 37 of the detection position to acquire a detection signal; the second branch terminal 3120 is connected to the controller 34 to transmit the acquired detection signal to the controller 34; the first branch terminal 3110 is connected with the second end 340 of the second expansion connector 33 to transmit the acquired detection signal into the second expansion connector 33. The first branch end 3310 and the second branch end 3320 of the second expansion connector 33 are connected to the controllers 36 and 35, respectively, to transmit the acquired detection signals to the controllers 36 and 35, respectively. Therefore, by using the two extension connectors in a combined manner, more than two independent controllers can share the detection result of the same detector, the number of independent parts adopted in the detection process is reduced, and the deployment complexity in the detection process is reduced.
An embodiment in which the second end portion of the expansion connector has more than two branch ends is described below with reference to fig. 4 and 5.
Fig. 4 is a schematic diagram of an expansion connector according to further embodiments of the present invention. As shown in fig. 4, the expansion connector 40 of this embodiment includes a first end 410 and a second end 420. The first end portion 410 includes a power input terminal 4101 and a signal output terminal 4102; the first branch end 4210 of the second end portion 420 includes a power output terminal 4211 and a signal input terminal 4212, and the second branch end 4220 includes a power output terminal 4221 and a signal input terminal 4222.
In the above embodiments, the power supply terminals may include a power supply positive terminal and a power supply negative terminal. The branch end of the second end portion may be provided in plural as necessary, and is not shown in fig. 4.
With the above-described embodiments, a detection requirement to distinguish whether the detection signals of the plurality of positions are "none" or "any number is present" is achieved. And, a plurality of quick connectors and connecting wires do not need to be deployed.
Embodiments of the present invention may also provide a detection system. In the detection system, an expansion connector, a controller and a detector are included. The controller is connected with the first end part of the expansion connector; the detector is connected to the second end of the expansion connector.
An embodiment of the detection system of the present invention is described below with reference to fig. 5 and 6.
FIG. 5 is a schematic diagram of a detection system according to some embodiments of the invention. In fig. 5, the detection system 50 includes an expansion connector 51, a controller 521, a controller 522, and a detector 53. The expansion connector 51 includes a first end portion and a second end portion 512, wherein the first end portion includes a first branch end 5111 and a second branch end 5112. The controller 521 is connected to the first branch end 5111, the controller 522 is connected to the second branch end 5112, and the detector 53 is connected to the second end 512.
FIG. 6 is a schematic diagram of a detection system according to further embodiments of the present invention. In fig. 6, the detection system 60 includes an expansion connector 61, a controller 62, a detector 631, and a detector 632. The expansion connector 61 includes a first end 611 and a second end, wherein the second end includes a first branch end 6121 and a second branch end 6122. The controller 62 is connected to the first end 611, the detector 631 is connected to the first branch end 6121, and the detector 632 is connected to the second branch end 6122.
FIG. 7 is a schematic diagram of a scenario in which multiple expansion connectors are used according to further embodiments of the present invention. As shown in fig. 7, there is a controller 75 in the scene that needs to acquire the detection signals of the detectors 76, 77 and 78 at three different detection positions and distinguish whether the signals at these three positions are "none" or "any one". At this time, two extension connectors may be employed, and the second end portion of each extension connector includes two branch ends.
The first expansion connector 71 includes a first end 710 and a second end, wherein the second end of the first expansion connector 71 includes a first branch end 7210 and a second branch end 7220; the second expansion connector 73 includes a first end 730 and a second end, wherein the second end of the second expansion connector 73 includes a first branch end 7410 and a second branch end 7420. First branch end 7210 is connected to detector 76, second branch end 7410 is connected to detector 77, and second branch end 7420 is connected to detector 78. The second branch end 7220 of the first expansion connector 71 is connected to the first end 730 of the second expansion connector 73 so that the first expansion connector 71 obtains a parallel result of the detection results of the respective branch ends of the first expansion connector 71 through the second branch end 7220. Then, the first end 710 of the first expansion connector 71 obtains the parallel connection result of the detection results of the first branch end 7210 and the second branch end 7220, and sends the parallel connection result to the controller 75 for processing. Therefore, by combining and using the two expansion connectors, the number of independent parts adopted in the detection process can be reduced and the deployment complexity in the detection process can be reduced when the detection requirements are to distinguish between 'none' and 'any number of existing'.
In the drawings of the above-described embodiments of the present invention, the shape of the expansion connector is merely exemplary, and does not limit the present invention in any way. For example, the expansion connector may employ an integrally formed housing; or quick connectors can be used as the first end part, the second end part and the branch end, and connecting wires are used for connecting the end parts and the branch end.
An embodiment of the detection method of the present invention is described below with reference to fig. 8. The expansion connector used in this embodiment may be any of the expansion connectors described above.
FIG. 8 is a flow chart illustrating a detection method according to some embodiments of the invention. As shown in fig. 8, the detection method of this embodiment includes steps S802 to S808.
In step S802, the expansion connector takes power through a first end portion of the expansion connector, wherein the first end portion is connected to the controller and includes a signal output terminal.
In step S804, the extension connector supplies power to the detector connected to the second end portion through the second end portion of the extension connector, wherein the second end portion includes a signal input terminal, and the signal output terminal of the first end portion is connected to the signal input terminal of the second end portion.
In step S806, the signal input terminal of the second end portion of the extension connector acquires the detection signal of the corresponding detector.
In step S808, the signal output terminal of the first end portion of the extension connector transmits the acquired detection signal to the controller.
With the method of the above embodiment, for a scenario of one input and multiple outputs, or for a scenario of multiple inputs and one output, there is no need to deploy multiple quick connectors and connecting wires, but only the expansion connector provided by the above embodiment needs to be used to connect the controller and the detector. Therefore, the number of independent components adopted in the detection process is reduced, and the deployment complexity in the detection process is reduced.
FIG. 9 is a flow chart illustrating a detection method according to further embodiments of the present invention. In this embodiment, the first end portion has more than two branch ends. The second end portion comprises a signal input terminal and a power output terminal; one branch end of the first end portion includes a power input terminal and a signal output terminal, and the other branch end includes a signal output terminal. The power input terminals are connected to the power output terminals of the second end portion, and each of the signal output terminals is connected to the signal input terminal of the second end portion. The structure of the expansion connector used in this embodiment can refer to the embodiment of fig. 2, for example. As shown in fig. 9, the detection method of this embodiment includes steps S902 to S908.
In step S902, the extension connector takes power through a branch terminal having a power input terminal in a first end portion of the extension connector.
In step S904, the extension connector supplies power to the detector connected to the second end portion through the second end portion of the extension connector.
In step S906, the signal input terminal of the second end portion of the extension connector acquires the detection signal of the corresponding detector.
In step S908, the signal output terminal of each branch terminal in the first end portion of the extension connector transmits the acquired detection signal to the corresponding controller. And if the branch end does not acquire the signal, the branch end does not transmit the signal.
Therefore, when the detector acquires the detection signal, the detection signal can be sent to the plurality of controllers through the expansion connector for processing, and the detection method of one input and a plurality of outputs is realized. And, a plurality of quick connectors and connecting wires do not need to be deployed.
FIG. 10 is a flow chart illustrating a detection method according to further embodiments of the present invention. In this embodiment, the second end portion has two or more branch ends, each of which includes a power supply output terminal and a signal input terminal. Each power output terminal is connected to the power input terminal of the first end portion, and each signal input terminal is connected to the signal output terminal of the first end portion. The structure of the expansion connector used in this embodiment can refer to the embodiment of fig. 4, for example. As shown in fig. 10, the detection method of this embodiment includes steps S1002 to S1010.
In step S1002, the expansion connector takes power through a first end of the expansion connector.
In step S1004, the extension connector supplies power to the detector to which the branch terminal is connected through each branch terminal of the second end portion of the extension connector.
In step S1006, the signal input terminal of each branch end of the second end portion of the extension connector acquires a detection signal of the corresponding detector.
The signal output terminal of the first end portion of the extension connector transmits the acquired detection signal to the corresponding controller.
If the corresponding detector does not generate a detection signal, the corresponding branch end cannot acquire the detection signal and does not transmit the detection signal.
In step S1008, when the signal input terminal of any one of the branch terminals of the second end portion of the extension connector acquires the detection signal, the signal output terminal of the first end portion of the extension connector transmits the acquired detection signal to the corresponding controller.
In step S1010, when the detection signal is not acquired by the signal input terminals of all the branch terminals of the second end portion of the extension connector, the detection signal is not output by the signal output terminal of the first end portion of the extension connector.
Thus, a detection requirement of distinguishing whether the detection signals of the plurality of detectors are "none at all" or "any number at all" is achieved. And, a plurality of quick connectors and connecting wires do not need to be deployed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. An expansion connector comprising:
the first end part is used for connecting the controller and getting power from the controller and comprises a signal output terminal; and
a second end portion for connecting and supplying power to the connected detector and acquiring a detection signal from the detector, including a signal input terminal, wherein a signal output terminal of the first end portion is connected with a signal input terminal of the second end portion;
wherein the first end or the second end has more than two branch ends;
wherein, in the case where the first end portion has two or more branch ends,
the second end portion comprises a signal input terminal and a power output terminal;
one branch end of the first end part comprises a power input terminal and a signal output terminal, and the other branch ends comprise signal output terminals, wherein the power input terminal is connected with the power output terminal of the second end part, and each signal output terminal is connected with the signal input terminal of the second end part.
2. The expansion connector of claim 1, wherein, in the case where the first end portion has two or more branch ends,
at least one branch end of the first end part is connected with the second end part of other expansion connectors so as to be connected with the controller through the other expansion connectors.
3. The extension connector of claim 1, wherein, in the case where the second end portion has two or more branch ends,
each branch end of the second end portion includes a power output terminal and a signal input terminal, wherein each power output terminal is connected with the power input terminal of the first end portion, and each signal input terminal is connected with the signal output terminal of the first end portion.
4. The expansion connector according to claim 1 or 3, wherein in the case where the second end portion has two or more branch ends,
at least one branch end of the second end portion is connected with the first end portion of the other extension connector so as to be connected with the detector through the other extension connector.
5. The extension connector of claim 1, wherein the controller is a Programmable Logic Controller (PLC).
6. A detection system, comprising:
an expansion connector as claimed in any one of claims 1 to 5;
a controller connected to a first end of the expansion connector; and
a detector connected with the second end of the expansion connector.
7. A method of detection, comprising:
the expansion connector obtains electricity through a first end part of the expansion connector, wherein the first end part is connected with the controller and comprises a signal output terminal;
the extension connector supplies power to the detector connected with the second end part through the second end part of the extension connector, wherein the second end part comprises a signal input terminal, and a signal output terminal of the first end part is connected with the signal input terminal of the second end part;
a signal input terminal of the second end of the extension connector acquires a detection signal of a corresponding detector;
the signal output terminal of the first end part of the expansion connector sends the acquired detection signal to the controller;
wherein the first end or the second end has more than two branch ends;
wherein, in the case where the first end portion has two or more branch ends, the second end portion includes a signal input terminal and a power output terminal; one branch end of the first end part comprises a power input terminal and a signal output terminal, and the other branch ends comprise signal output terminals, wherein the power input terminal is connected with the power output terminal of the second end part, and each signal output terminal is connected with the signal input terminal of the second end part.
8. The detection method according to claim 7,
the extension connector takes power through a branch end with a power input terminal in a first end part of the extension connector;
the signal output terminal of each branch end in the first end portion of the extension connector transmits the acquired detection signal to the corresponding controller.
9. The detection method according to claim 7, wherein in a case where the second end portion has two or more branch ends, each branch end of the second end portion includes a power supply output terminal and a signal input terminal, wherein each power supply output terminal is connected with the power supply input terminal of the first end portion, and each signal input terminal is connected with the signal output terminal of the first end portion;
the extension connector supplies power to the detector connected with the branch end through each branch end of the second end part of the extension connector;
a signal input terminal of each branch end of the second end part of the extension connector acquires a detection signal of a corresponding detector;
under the condition that a signal input terminal of any branch end of a second end part of the extension connector acquires a detection signal, a signal output terminal of a first end part of the extension connector sends the acquired detection signal to a corresponding controller;
when the signal input terminals of all the branch terminals of the second end portion of the extension connector do not acquire the detection signal, the signal output terminal of the first end portion of the extension connector does not output the detection signal.
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