A proximity switch based detection system and automotive sampling device

Abstract

The disclosure provides a detection system based on proximity switches and a vehicle sampling device, wherein the detection system comprises a plurality of proximity switches, a power module and a control module; the proximity switch comprises a first power supply end, a second power supply end and a signal output end; the power module comprises a first power supply line and a second power supply line with opposite polarities; the signal output end of the first proximity switch and the first power supply end of the second proximity switch in adjacent proximity switches are connected, the first power supply line is connected with the first power supply end of the first proximity switch in all proximity switches, the second power supply line is connected with the second power supply end of each proximity switch, and the signal input end of the control module is connected with the signal output end of the last proximity switch in all proximity switches. In the detection system based on proximity switches and the vehicle sampling device, the ''and'' logic function of the plurality of proximity switches is realized by using series connection, so that the occupation of multiple channels in the control module and the increase of the preamplifier are avoided.

Description

Technical Field

[0001] This disclosure relates to the field of proximity switch detection technology, and more particularly to a proximity switch-based detection system and automotive sampling equipment. Background Technology

[0002] For field equipment such as coal sampling from vehicles, multiple proximity switches need to be installed for detection. Although each proximity switch has a different function, in some situations where redundancy is required or the object being detected is long and wide, multiple proximity switches with the same purpose need to be installed.

[0003] Furthermore, by using multiple DI channels of the control system and then implementing the AND logic through program settings, or by adding a multi-channel preamplifier, the detection cost is increased and the failure rate is raised, making it difficult to meet the usage requirements. Summary of the Invention

[0004] This disclosure aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, the purpose of this disclosure is to provide a detection system and an automotive sampling device based on a proximity switch.

[0006] To achieve the above objectives, the first aspect of this disclosure provides a detection system based on proximity switches, comprising: a plurality of proximity switches, a power supply module, and a control module; each proximity switch includes: a first power terminal, a second power terminal, and a signal output terminal; when the proximity switch approaches a target object, the first power terminal and the signal output terminal of the proximity switch are turned on or off; the power supply module includes: a first power line and a second power line with opposite polarities; all the proximity switches are connected in series, wherein the signal output terminal of the first proximity switch and the first power terminal of the second proximity switch in adjacent proximity switches are connected, the first power line is connected to the first power terminal of the first proximity switch in all the proximity switches, the second power line is connected to the second power terminal of each proximity switch, and the signal input terminal of the control module is connected to the signal output terminal of the last proximity switch in all the proximity switches.

[0007] Optionally, the proximity switch is a PNP type normally open switch, and the first power line is the positive terminal and the second power line is the negative terminal; wherein, when the proximity switch is close to the target object, the first power terminal and the signal output terminal of the proximity switch are connected, and the signal output terminal of the proximity switch is a high-level signal.

[0008] Optionally, the proximity switch is a PNP type normally closed switch, and the first power supply line is the positive terminal and the second power supply line is the negative terminal; wherein, when the proximity switch is close to the target object, the first power supply terminal and the signal output terminal of the proximity switch are disconnected, and the signal output terminal of the proximity switch is a low-level signal.

[0009] Optionally, the proximity switch is an NPN type normally open switch, and the first power line is the negative terminal and the second power line is the positive terminal; wherein, when the proximity switch is close to the target object, the first power terminal and the signal output terminal of the proximity switch are connected, and the signal output terminal of the proximity switch is a low-level signal.

[0010] Optionally, the proximity switch is an NPN type normally closed switch, and the first power supply line is the negative terminal and the second power supply line is the positive terminal; wherein, when the proximity switch is close to the target object, the first power supply terminal and the signal output terminal of the proximity switch are connected, and the signal output terminal of the proximity switch is a high-level signal.

[0011] Optionally, the detection system further includes: a digital input (DI) module, wherein the signal input terminal of the DI module is connected to the signal output terminal of the last proximity switch among all the proximity switches, and the signal output terminal of the DI module is connected to the signal input terminal of the control module.

[0012] Optionally, the control module includes a programmable logic controller (PLC), wherein the signal input terminal of the PLC is connected to the signal output terminal of the DI module.

[0013] Optionally, the control module includes a distributed control system, wherein the signal input terminal of the distributed control system is connected to the signal output terminal of the DI module.

[0014] A second aspect of this disclosure provides an automotive sampling device, comprising: a proximity switch-based detection system as provided in the first aspect of this disclosure.

[0015] The technical solution provided in this disclosure may include the following beneficial effects:

[0016] Since the first power line is connected to the first power terminal of the first proximity switch among all proximity switches, and the second power line is connected to the second power terminal of each proximity switch, and the signal output terminal of the first proximity switch and the first power terminal of the second proximity switch among adjacent proximity switches are connected, multiple proximity switches are connected in series between the first power line and the signal input terminal of the control module. This series connection realizes the AND logic function of multiple proximity switches, thereby avoiding the occupation of multiple channels in the control module and the increase of preamplifiers, thus reducing detection costs, lowering the failure rate, and meeting the usage requirements.

[0017] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a circuit diagram of a detection system based on a proximity switch according to an embodiment of the present disclosure (the proximity switch is a PNP type normally open switch);

[0020] Figure 2 This is a circuit diagram of a detection system based on a proximity switch according to an embodiment of the present disclosure (the proximity switch is a PNP type normally closed switch);

[0021] Figure 3 This is a circuit diagram of a detection system based on a proximity switch according to an embodiment of the present disclosure (the proximity switch is an NPN type normally open switch);

[0022] Figure 4 This is a circuit diagram of a detection system based on a proximity switch according to an embodiment of the present disclosure (the proximity switch is an NPN type normally closed switch);

[0023] As shown in the figure: 1. Proximity switch, 11. First power supply terminal, 12. Second power supply terminal, 13. Signal output terminal;

[0024] 2. First power cord; 3. Second power cord. Detailed Implementation

[0025] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the figure, this disclosure proposes a detection system based on a proximity switch 1, including: multiple proximity switches 1, a power supply module and a control module (not shown in the figure). The proximity switch 1 includes: a first power supply terminal 11, a second power supply terminal 12 and a signal output terminal 13. When the proximity switch 1 approaches the target object, the first power supply terminal 11 and the signal output terminal 13 of the proximity switch 1 are turned on or off. The power supply module includes: a first power line 2 and a second power line 3 with opposite polarities. All proximity switches 1 are connected in series. The signal output terminal 13 of the first proximity switch 1 and the first power supply terminal 11 of the second proximity switch 1 in adjacent proximity switches 1 are connected. The first power line 2 is connected to the first power supply terminal 11 of the first proximity switch 1 in all proximity switches 1. The second power line 3 is connected to the second power supply terminal 12 of each proximity switch 1. The signal input terminal of the control module is connected to the signal output terminal 13 of the last proximity switch 1 in all proximity switches 1.

[0027] Understandably, since the first power line 2 is connected to the first power terminal 11 of the first proximity switch 1 among all proximity switches 1, and the second power line 3 is connected to the second power terminal 12 of each proximity switch 1, and the signal output terminal 13 of the first proximity switch 1 and the first power terminal 11 of the second proximity switch 1 among adjacent proximity switches 1, multiple proximity switches 1 are connected in series between the first power line 2 and the signal input terminal of the control module. Thus, the "AND" logic function of multiple proximity switches 1 is realized by using series wiring, thereby avoiding the occupation of multiple channels in the control module and the increase of preamplifiers, thereby reducing detection costs, lowering the failure rate, and thus meeting the usage requirements.

[0028] It should be noted that by using the series connection of multiple proximity switches 1, the occupation of multiple channels in the control module is avoided, thereby reducing the computational load of the control module and improving its operating efficiency. At the same time, it also avoids the need for an additional preamplifier, thus saving maintenance work and potential hazards caused by preamplifier failure, signal mistransmission, etc.

[0029] The proximity switch 1 is a sensor that can detect the presence of an object without physical contact. It is widely used in automated control systems. It detects the target object through electromagnetic induction, capacitance change, photoelectric effect, etc., and outputs a switching signal. That is, when the proximity switch 1 is close to the target object, the first power supply terminal 11 and the signal output terminal 13 of the proximity switch 1 are turned on or off, so that the signal output terminal 13 outputs a high-level signal or a low-level signal.

[0030] Among them, proximity switch 1 can be a PNP type normally open switch, a PNP type normally closed switch, an NPN type normally open switch, an NPN type normally closed switch, etc., and there is no restriction on this.

[0031] The power module is used to provide power to the proximity switch 1 so that the proximity switch 1 can output a high-level signal or a low-level signal. The first power line 2 and the second power line 3 of the power module have opposite polarities. Specifically, if the first power line 2 is positive, then the second power line 3 is negative, and vice versa.

[0032] The control module is used to obtain the position information of the target object by using the high-level or low-level signal output by the proximity switch 1. Based on the above series wiring method, the signal input terminal of the control module can only receive the signal when all proximity switches 1 output high-level or low-level signals, that is, the "AND" logic function. The specific type of the control module can be set according to actual needs and there is no restriction on it.

[0033] like Figure 1 As shown, in some embodiments, the proximity switch 1 is a PNP type normally open switch, and the first power line 2 is the positive terminal and the second power line 3 is the negative terminal. When the proximity switch 1 approaches the target object, the first power terminal 11 and the signal output terminal 13 of the proximity switch 1 are connected, and the signal output terminal 13 of the proximity switch 1 is a high-level signal.

[0034] It is understandable that since proximity switch 1 is a PNP type normally open switch, and the first power line 2 is positive and the second power line 3 is negative, when proximity switch 1 approaches the target object, the first power terminal 11 and the signal output terminal 13 of proximity switch 1 are connected, thereby converting the signal output terminal 13 of proximity switch 1 into a high-level signal, so that the control module can use proximity switch 1 to obtain the position information of the target object.

[0035] like Figure 2 As shown, in some embodiments, the proximity switch 1 is a PNP type normally closed switch, and the first power line 2 is the positive terminal and the second power line 3 is the negative terminal. When the proximity switch 1 approaches the target object, the first power terminal 11 and the signal output terminal 13 of the proximity switch 1 are disconnected, and the signal output terminal 13 of the proximity switch 1 is a low-level signal.

[0036] It is understandable that since proximity switch 1 is a PNP type normally closed switch, and the first power line 2 is positive and the second power line 3 is negative, when proximity switch 1 approaches the target object, the first power terminal 11 and the signal output terminal 13 of proximity switch 1 are disconnected, so that the signal output terminal 13 of proximity switch 1 is a low level signal, thereby enabling the control module to obtain the position information of the target object using proximity switch 1.

[0037] like Figure 3As shown, in some embodiments, the proximity switch 1 is an NPN type normally open switch, and the first power line 2 is the negative terminal and the second power line 3 is the positive terminal. When the proximity switch 1 approaches the target object, the first power terminal 11 and the signal output terminal 13 of the proximity switch 1 are connected, and the signal output terminal 13 of the proximity switch 1 is a low-level signal.

[0038] It is understandable that since proximity switch 1 is an NPN type normally open switch, and the first power line 2 is the negative terminal and the second power line 3 is the positive terminal, when proximity switch 1 approaches the target object, the first power terminal 11 and the signal output terminal 13 of proximity switch 1 are connected, so that the signal output terminal 13 of proximity switch 1 is a low level signal, thereby enabling the control module to obtain the position information of the target object using proximity switch 1.

[0039] like Figure 4 As shown, in some embodiments, the proximity switch 1 is an NPN type normally closed switch, and the first power line 2 is the negative terminal and the second power line 3 is the positive terminal. When the proximity switch 1 approaches the target object, the first power terminal 11 and the signal output terminal 13 of the proximity switch 1 are connected, and the signal output terminal 13 of the proximity switch 1 is a high-level signal.

[0040] It is understandable that since proximity switch 1 is an NPN type normally closed switch, and the first power line 2 is the negative terminal and the second power line 3 is the positive terminal, when proximity switch 1 approaches the target object, the first power terminal 11 and the signal output terminal 13 of proximity switch 1 are connected, so that the signal output terminal 13 of proximity switch 1 is a high-level signal, thereby enabling the control module to obtain the position information of the target object using proximity switch 1.

[0041] In some embodiments, the detection system further includes a DI (Digital Input) module, the signal input terminal of the DI module is connected to the signal output terminal 13 of the last proximity switch 1 among all proximity switches 1, and the signal output terminal 13 of the DI module is connected to the signal input terminal of the control module.

[0042] It is understandable that, since the signal input terminal of the DI module is connected to the signal output terminal 13 of the last proximity switch 1 in all proximity switches 1, and the signal output terminal 13 of the DI module is connected to the signal input terminal of the control module, when the signal output terminals 13 of all proximity switches 1 are outputting signals, the DI module can convert the output signal into a digital signal and send it to the control module, thereby ensuring that the control module accurately obtains the position of the target object.

[0043] It should be noted that the DI module is used for conversion and adaptation between the output signal of proximity switch 1 and the input signal of the control module. Based on the series connection of multiple proximity switches 1, only one channel of the DI module is needed. The specific type of DI module can be set according to actual needs and there are no restrictions on it.

[0044] In some embodiments, the control module includes a programmable logic controller (PLC), wherein the signal input terminal of the PLC is connected to the signal output terminal 13 of the DI module.

[0045] It is understandable that, since the signal input terminal of the programmable logic controller is connected to the signal output terminal 13 of the DI module, when all the signal output terminals 13 of the proximity switches 1 are outputting signals, the DI module can convert the output signals into digital signals and send them to the programmable logic controller, thereby ensuring that the programmable logic controller accurately obtains the position of the target object.

[0046] In some embodiments, the control module includes a distributed control system (DCS), wherein the signal input terminal of the distributed control system is connected to the signal output terminal 13 of the DI module.

[0047] Understandably, since the signal input terminal of the distributed control system is connected to the signal output terminal 13 of the DI module, when all the signal output terminals 13 of the proximity switches 1 are outputting signals, the DI module can convert the output signals into digital signals and send them to the distributed control system, thereby ensuring that the distributed control system accurately obtains the position of the target object.

[0048] This disclosure also proposes an automotive sampling device, including: a detection system based on proximity switch 1 as described in this disclosure.

[0049] Understandably, since the first power line 2 is connected to the first power terminal 11 of the first proximity switch 1 among all proximity switches 1, and the second power line 3 is connected to the second power terminal 12 of each proximity switch 1, and the signal output terminal 13 of the first proximity switch 1 and the first power terminal 11 of the second proximity switch 1 among adjacent proximity switches 1, multiple proximity switches 1 are connected in series between the first power line 2 and the signal input terminal of the control module. Thus, the "AND" logic function of multiple proximity switches 1 is realized by using series wiring, thereby avoiding the occupation of multiple channels in the control module and the increase of preamplifiers, thereby reducing detection costs, lowering the failure rate, and thus meeting the usage requirements.

[0050] It should be noted that the vehicle sampling equipment is a device used for coal sampling and preparation. It is mainly used in thermal power plants, coal terminals and other units for sampling coal transported by truck. The vehicle sampling equipment can continuously complete the processes of sampling, sample preparation and reduction.

[0051] Among them, the vehicle sampling equipment uses multiple proximity switches 1 to accurately obtain the vehicle's location, thereby achieving accurate sampling.

[0052] In the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0053] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A detection system based on a proximity switch, characterized in that, include: Multiple proximity switches, power supply modules, and control modules; The proximity switch includes a first power supply terminal, a second power supply terminal, and a signal output terminal. When the proximity switch approaches the target object, the first power supply terminal and the signal output terminal of the proximity switch are turned on or off. The power module includes: a first power line and a second power line with opposite polarities; All the proximity switches are connected in series, wherein the signal output terminal of the first proximity switch and the first power supply terminal of the second proximity switch are connected in adjacent proximity switches, the first power supply line is connected to the first power supply terminal of the first proximity switch in all the proximity switches, the second power supply line is connected to the second power supply terminal of each proximity switch, and the signal input terminal of the control module is connected to the signal output terminal of the last proximity switch in all the proximity switches.

2. The detection system based on a proximity switch according to claim 1, characterized in that, The proximity switch is a PNP type normally open switch, and the first power line is the positive terminal and the second power line is the negative terminal; Specifically, when the proximity switch approaches the target object, the first power supply terminal and the signal output terminal of the proximity switch are connected, and the signal output terminal of the proximity switch is a high-level signal.

3. The detection system based on a proximity switch according to claim 1, characterized in that, The proximity switch is a PNP type normally closed switch, and the first power line is the positive terminal and the second power line is the negative terminal; Specifically, when the proximity switch approaches the target object, the first power supply terminal and the signal output terminal of the proximity switch are disconnected, and the signal output terminal of the proximity switch is a low-level signal.

4. The detection system based on a proximity switch according to claim 1, characterized in that, The proximity switch is an NPN normally open switch, and the first power line is the negative terminal and the second power line is the positive terminal; Specifically, when the proximity switch approaches the target object, the first power supply terminal and the signal output terminal of the proximity switch are connected, and the signal output terminal of the proximity switch is a low-level signal.

5. The detection system based on a proximity switch according to claim 1, characterized in that, The proximity switch is an NPN type normally closed switch, and the first power line is the negative terminal and the second power line is the positive terminal; Specifically, when the proximity switch approaches the target object, the first power supply terminal and the signal output terminal of the proximity switch are connected, and the signal output terminal of the proximity switch is a high-level signal.

6. The detection system based on a proximity switch according to claim 1, characterized in that, The detection system also includes: The digital input (DI) module has its signal input terminal connected to the signal output terminal of the last proximity switch among all the proximity switches, and its signal output terminal connected to the signal input terminal of the control module.

7. The detection system based on a proximity switch according to claim 6, characterized in that, The control module includes: A programmable logic controller (PLC) is provided, wherein the signal input terminal of the PLC is connected to the signal output terminal of the DI module.

8. The detection system based on a proximity switch according to claim 6, characterized in that, The control module includes: A distributed control system, wherein the signal input terminal of the distributed control system is connected to the signal output terminal of the DI module.

9. A vehicle sampling device, characterized in that, include: The proximity switch-based detection system as described in any one of claims 1-8.

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