Signal transmission structure among multiple devices and control system

Abstract

The utility model discloses a signal transmission structure among multiple devices and a control system, the signal transmission structure comprises a first control device, a second control device and a transmitter device, the first control device of the first device is provided with a first signal end and a second signal end; a second control device of the second equipment is provided with a third signal end and a fourth signal end; the transmitter device comprises a first connecting end and a second connecting end, the first connecting end is connected with the first signal end, the second connecting end is connected with the fourth signal end, and the second signal end is connected with the third signal end; the transmitter device transmits a transmitter signal to the first control device, and the first control device transmits the transmitter signal to the second control device. According to the signal transmission structure among the multiple devices, the measured value of the transmitter can be transmitted to different control devices under the condition that components are not added, the cost of the components is saved, the purchasing time is saved, and fault points possibly occurring in a system are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of signal transmission technology fields between multiple devices, especially a kind of signal transmission structure and control system between multiple devices. BACKGROUND

[0002] Papermaking workshop is composed of various equipment, each single equipment generally will be provided with independent PLC system, for example, control equipment will be provided with DCS, MCS etc. System, and the monitoring value of the detection instrument of single equipment is generally only displayed on the system of its own equipment, but due to the need of workshop process monitoring, the monitoring value of the detection instrument of single equipment needs to be displayed on the system of other control equipment, to achieve the purpose of centralized monitoring or generating history curve;For example, two equipment are provided with DCS system and MCS system respectively, and when transmitter is used as detection instrument, its signal will be connected to MCS system, but the current demand is to connect the transmitter signal to DCS system at the same time, to display on the picture of DCS system and generate history curve using transmitter signal as production monitoring.

[0003] The existing connection method is to use one-to-two signal isolator to divide the current analog signal output by one transmitter into two paths to be respectively given to two different systems, but it needs to increase the use of signal isolator component, and needs to configure power supply to supply power, which will undoubtedly increase production cost, and there is a certain probability of failure. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of signal transmission structure between multiple devices, can transmit the measured value of a transmitter to different equipment respectively without increasing component, is beneficial to save component cost, save procurement time and reduce possible failure point in equipment.

[0005] Another object of the utility model is to provide a kind of control system, wherein the signal transmission structure between multiple devices can transmit the measured value of a transmitter to different equipment respectively without increasing component, is beneficial to save component cost, save procurement time and reduce possible failure point in equipment.

[0006] In order to achieve the above object, the utility model discloses a kind of signal transmission structure between multiple devices, it includes:

[0007] First control device, the first control device is set to first equipment, the first control device is provided with first signal end and second signal end;

[0008] Second control device, the second control device is set to second equipment, the second control device is provided with third signal end and fourth signal end;

[0009] a transmitter device, the transmitter device comprising a first connecting end and a second connecting end, the first connecting end being connected with a first signal end of the first control device, the second connecting end being connected with a fourth signal end of the second control device, the fourth signal end being connected with the third signal end;

[0010] the transmitter device transmits a transmitter signal to the first control device through the first connecting end and the first signal end, the first control device transmits the transmitter signal to the second control device through the second signal end and the third signal end.

[0011] Optionally, the transmitter device comprises a two-wire transmitter, the two-wire transmitter being provided with a first negative end formed as the first connecting end and a first positive end formed as the second connecting end.

[0012] the first device is a DCS control cabinet, and is provided with a DCS passive channel, the DCS passive channel comprising a DCS positive signal end formed as the first signal end and a DCS negative signal end formed as the second signal end.

[0013] the second device is a MCS control cabinet, and is provided with a MCS active channel, the MCS active channel comprising a MCS negative signal end formed as the third signal end and a MCS positive signal end formed as the fourth signal end, the MCS control cabinet providing a power supply signal to the transmitter device through the fourth signal end and the first connecting end.

[0014] Optionally, the transmitter device is a four-wire transmitter, the four-wire transmitter being provided with a second positive end formed as the first connecting end and a second negative end formed as the second connecting end.

[0015] the first device is a MCS control cabinet, and is provided with a MCS passive channel, the MCS passive channel comprising a MCS positive signal end formed as the first signal end and a MCS negative signal end formed as the second signal end.

[0016] the second device is a DCS control cabinet, and is provided with a DCS passive channel, the DCS passive channel comprising a DCS positive signal end formed as the third signal end and a DCS negative signal end formed as the fourth signal end.

[0017] Optionally, the four-wire transmitter is further provided with a positive power supply end and a negative power supply end, the positive power supply end being connected with a fire end of an external power supply, the negative power supply end being connected with a zero end of the external power supply.

[0018] Optionally, the transmitter device is provided with a short-circuit module, the short-circuit module comprises a first short-circuit end and a second short-circuit end, the first short-circuit end is connected with the second signal end, and the second short-circuit end is connected with the third signal end, so that the second signal end is connected with the third signal end through the first short-circuit end and the second short-circuit end.

[0019] Optionally, the transmitter device is provided with a first connecting line and a second connecting line, the first connecting line comprises a first signal line, a second signal line and a first shielding layer wrapping the first signal line and the second signal line, the second connecting line comprises a third signal line, a fourth signal line and a second shielding layer wrapping the third signal line and the fourth signal line, two ends of the first signal line are connected with the first connecting end and the first signal end respectively, two ends of the second signal line are connected with the first short-circuit end and the second signal end respectively, two ends of the third signal line are connected with the second short-circuit end and the third signal end respectively, and two ends of the fourth signal line are connected with the second connecting end and the fourth signal end respectively, the first shielding layer and the second shielding layer are grounded.

[0020] In order to realize the above-mentioned another object, the utility model discloses a control system, it includes: first equipment, second equipment and as preceding multi -equipment signal transmission structure.

[0021] The utility model discloses a transmitter device and first control device and second control device are directly connected to make its current signal flow through each control equipment, first control device is provided with first signal end and second signal end, and second control device is provided with third signal end and fourth signal end, and transmitter device includes first connecting end and second connecting end, and first connecting end is connected with first control device's first signal end, and second connecting end is connected with second control device's fourth signal end, and second signal end is connected with third signal end, and transmitter device transmits transmitter signal to first control device through first connecting end and first signal end, and first control device transmits transmitter signal to second control device through second signal end and third signal end, and then realize under the condition of not increasing component, and the measured value of a transmitter is transmitted to different equipment respectively, be favorable to the component cost of saving, save procurement time and reduce the possible failure point of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the circuit structure diagram of the utility model control system.

[0023] Figure 2 It is the circuit structure diagram of the utility model control system first embodiment.

[0024] Figure 3 It is the circuit structure diagram of the utility model control system second embodiment.

[0025] Figure 4 The circuit structure diagram of the third embodiment of the control system of the utility model.

[0026] Figure 5 The circuit structure diagram of the fourth embodiment of the control system of the utility model. DETAILED DESCRIPTION

[0027] In order to make the technical content, structural features, purposes and effects of the utility model clear, the following will be described in detail in combination with the embodiments and the drawings.

[0028] Please refer to Figures 1 to 5 The utility model discloses a kind of inter-device signal transmission structures, it includes:

[0029] First control device 1, first control device 1 is set to first equipment 10, first control device 1 is provided with first signal end 11 and second signal end 12;

[0030] Second control device 2, second control device 2 is set to second equipment 20, second control device 2 is provided with third signal end 21 and fourth signal end 22;

[0031] Transmitter device 3, transmitter device 3 includes first connecting end 31 and second connecting end 32, first connecting end 31 is connected with the first signal end 11 of first control device 1, second connecting end 32 is connected with the fourth signal end 22 of second control device 2, second signal end 12 is connected with third signal end 21;

[0032] Transmitter device 3 is transmitted transmitter signal to first control device 1 by first connecting end 31 and first signal end 11, and first control device 1 is transmitted transmitter signal to second control device 2 by second signal end 12 and third signal end 21.

[0033] The utility model discloses a transmitter device 3 and first control device 1 and second control device 2 are directly connected to make its current signal flow through each control equipment, first control device 1 is provided with first signal end 11 and second signal end 12, and second control device 2 is provided with third signal end 21 and fourth signal end 22, and transmitter device 3 includes first connecting end 31 and second connecting end 32, first connecting end 31 is connected with first control device 1's first signal end 11, and second connecting end 32 is connected with second control device 2's fourth signal end 22, and second signal end 12 is connected with third signal end 21, and transmitter device 3 transmits transmitter signal to first control device 1 through first connecting end 31 and first signal end 11, and first control device 1 transmits transmitter signal to second control device 2 through second signal end 12 and third signal end 21, and then realizes in the condition of not increasing component, and the measurement of a transmitter is transmitted to different equipment respectively, is favorable to the component cost of saving, saves procurement time and reduces the possible failure point in equipment.

[0034] Reference Figure 1 、 Figure 2 and Figure 4 In the first embodiment and the third embodiment, the transmitter device 3 includes a two-wire transmitter 301, and the two-wire transmitter 301 is provided with a first negative terminal 3011 formed as the first connecting end 31 and a first positive terminal 3012 formed as the second connecting end 32.

[0035] The first device 10 is a DCS control cabinet 100, and is provided with a DCS passive channel, and the DCS passive channel includes a DCS positive signal end 101 formed as the first signal end 11 and a DCS negative signal end 102 formed as the second signal end 12.

[0036] The second device 20 is an MCS control cabinet 200, and is provided with an MCS active channel, and the MCS active channel includes an MCS negative signal end 201 formed as the third signal end 21 and an MCS positive signal end 202 formed as the fourth signal end 22, and the MCS control cabinet 200 provides a power supply signal to the transmitter device 3 through the fourth signal end 22 and the first connecting end 31.

[0037] Specifically, in the present embodiment, since the two-wire transmitter 301 is adopted as the transmitter and the MCS active channel of the MCS control cabinet 200 provides a 24V power supply signal for the two-wire transmitter 301, the MCS control cabinet 200 outputs a current signal to the two-wire transmitter 301 through the MCS positive signal end 202 to enable the two-wire transmitter 301 to perform detection work, and the two-wire transmitter 301 adjusts the size of the current signal according to the measured data to convert it into a measurement current with a size range of 4mA-20mA and outputs it to the DCS positive signal end 101 of the DCS control cabinet 100 through the first negative end 3011, so that the DCS control cabinet 100 obtains the data measured by the transmitter according to the received measurement current, and then the DCS control cabinet 100 outputs the measurement current to the MCS negative signal end 201 of the MCS control cabinet 200 through the DCS negative signal end 102, so that the MCS control cabinet 200 can also obtain the data measured by the transmitter according to the received measurement current.

[0038] Referring to Figure 1 , Figure 3 and Figure 5 , in the second embodiment and the fourth embodiment, the transmitter device 3 is a four-wire transmitter 302, which is provided with a second positive end 3021 formed as the first connection end 31 and a second negative end 3022 formed as the second connection end 32;

[0039] The first device 10 is the MCS control cabinet 200, which is provided with an MCS passive channel including the MCS positive signal end 202 formed as the first signal end 11 and the MCS negative signal end 201 formed as the second signal end 12;

[0040] The second device 20 is the DCS control cabinet 100, which is provided with a DCS passive channel including the DCS positive signal end 101 formed as the third signal end 21 and the DCS negative signal end 102 formed as the fourth signal end 22.

[0041] Further, the four-wire transmitter 302 is further provided with a positive power supply end 3023 and a negative power supply end 3024, the positive power supply end 3023 is connected with the fire wire end L of an external power supply, and the negative power supply end 3024 is connected with the zero wire end N of the external power supply.

[0042] Specifically, in the present embodiment, since the four-wire transmitter 302 is adopted as the transmitter and is powered by the external power supply through the positive power supply end 3023 and the negative power supply end 3024 to enable the four-wire transmitter 302 to perform detection work, the four-wire transmitter 302 directly outputs a measurement current with a size ranging between 4mA-20mA to the MCS positive signal end 202 of the MCS control cabinet 200 through the second positive end according to the measured data, and the MCS control cabinet 200 obtains the data measured by the transmitter according to the received measurement current, and then the MCS control cabinet 200 outputs the measurement current to the DCS positive signal end 101 of the DCS control cabinet 100 through the MCS negative signal end 201, so that the DCS control cabinet 100 can also obtain the data measured by the transmitter according to the received measurement current.

[0043] According to the above signal transmission wiring structure, the AI channels of the MCS control cabinet 200 and the DCS control cabinet 100 are connected in series by the signal line to form a signal loop, so that the measurement current output by the transmitter device 3 can flow through the MCS control cabinet 200 and the DCS control cabinet 100, thereby realizing that the measurement signal of one transmitter device 3 is connected to two different PLC systems (MCS system and DCS system), which is beneficial to save the one-in-two signal isolator in the existing scheme, while reducing the possible failure points in the equipment, and not limited thereto, according to the principle of the above signal transmission structure, the signal of one transmitter can be connected to more than two PLC systems.

[0044] Referring to Figure 1 , Figure 4 and Figure 5 , in the third embodiment and the fourth embodiment, the transmitter device 3 is provided with a short-circuit module 303, the short-circuit module 303 includes a first short-circuit end 3031 and a second short-circuit end 3032, the first short-circuit end 3031 is connected with the second signal end 12, and the second short-circuit end 3032 is connected with the third signal end 21, so that the second signal end 12 is connected with the third signal end 21 through the first short-circuit end 3031 and the second short-circuit end 3032.

[0045] Specifically, since in actual application, as shown in the third embodiment Figure 3 and the fourth embodiment Figure 4 , the MCS control cabinet 200 and the DCS control cabinet 100 are far apart, one signal line can be drawn from the second signal end 12 of the MCS control cabinet 200 and the third signal end 21 of the DCS control cabinet 100 to the short-circuit module 303 in the transmitter cavity to short-circuit the two signal lines by using the short-circuit module 303, thereby realizing the connection between the second signal end 12 of the first control device 1 and the third signal end 21 of the second control device 2.

[0046] Further, the transmitter device 3 is provided with a first connecting line 33 and a second connecting line 34, the first connecting line 33 comprising a first signal line 331, a second signal line 332 and a first shielding layer 333 wrapping the first signal line 331 and the second signal line 332, the second connecting line 34 comprising a third signal line 341, a fourth signal line 342 and a second shielding layer 343 wrapping the third signal line 341 and the fourth signal line 342, two ends of the first signal line 331 being connected with the first connecting end 31 and the first signal end 11 respectively, two ends of the second signal line 332 being connected with the first short-circuit end 3031 and the second signal end 12 respectively, two ends of the third signal line 341 being connected with the second short-circuit end 3032 and the third signal end 21 respectively, two ends of the fourth signal line 342 being connected with the second connecting end 33 and the fourth signal end 22 respectively, and the first shielding layer 333 and the second shielding layer 343 being grounded.

[0047] The above multi-device signal transmission structure is suitable for the case that field process devices are provided with transmitters for measuring data including motor current, flow, concentration, temperature, pressure, liquid level, vacuum, differential pressure and the like, but the data measured by the transmitters need to be displayed on multiple different PLC systems.

[0048] Please refer to Figures 1 to 5 The utility model discloses a control system, it includes: first equipment 10, second equipment 20 and as aforementioned multi-device signal transmission structure.

[0049] The above disclosed is only the preferred embodiment of the utility model, of course can not with this to limit the utility model right scope, therefore the equivalent change of the utility model application patent scope, still belongs to the utility model the scope covered.

Claims

1. A multi-device signal transmission structure, characterized by, The utility model relates to a kind of signal transmission method and device, including: First control device, the first control device is set to first equipment, the first control device is provided with first signal end and second signal end; Second control device, the second control device is set to second equipment, the second control device is provided with third signal end and fourth signal end; Transmitter device, the transmitter device includes first connection end and second connection end, the first connection end is connected with the first signal end of the first control device, the second connection end is connected with the fourth signal end of the second control device, and the second signal end is connected with the third signal end; The transmitter device transmits transmitter signal to the first control device by the first connection end and the first signal end, and the first control device transmits transmitter signal to the second control device by the second signal end and the third signal end.

2. The multi-device signal transmission structure of claim 1, wherein, The transmitter device includes two-wire transmitter, which is provided with a first negative terminal formed as the first connection end and a first positive terminal formed as the second connection end; The first equipment is DCS control cabinet, and is provided with DCS passive channel, and the DCS passive channel includes DCS positive signal end formed as the first signal end and DCS negative signal end formed as the second signal end; The second equipment is MCS control cabinet, and is provided with MCS active channel, and the MCS active channel includes MCS negative signal end formed as the third signal end and MCS positive signal end formed as the fourth signal end, and the MCS control cabinet provides power supply signal to the transmitter device through the fourth signal end and the first connection end.

3. The multi-device signal transmission structure of claim 1, wherein, The transmitter device is four-wire transmitter, which is provided with a second positive terminal formed as the first connection end and a second negative terminal formed as the second connection end; The first equipment is MCS control cabinet, and is provided with MCS passive channel, and the MCS passive channel includes MCS positive signal end formed as the first signal end and MCS negative signal end formed as the second signal end; The second equipment is DCS control cabinet, and is provided with DCS passive channel, and the DCS passive channel includes DCS positive signal end formed as the third signal end and DCS negative signal end formed as the fourth signal end.

4. The multi-device signal transmission structure of claim 3, wherein, The four-wire transmitter is also provided with a positive power supply terminal and a negative power supply terminal, the positive power supply terminal is connected with the firewire end of external power supply, and the negative power supply terminal is connected with the zero line end of external power supply.

5. The multi-device signal transmission structure of claim 1, wherein, The transmitter device is provided with a short-circuit module, the short-circuit module includes first short-circuit terminal and second short-circuit terminal, the first short-circuit terminal is connected with the second signal end, and the second short-circuit terminal is connected with the third signal end, so that the second signal end is connected with the third signal end through the first short-circuit terminal and the second short-circuit terminal.

6. The multi-device signal transmission structure of claim 5, wherein, The transmitter device is provided with a first connecting line and a second connecting line, the first connecting line comprises a first signal line, a second signal line and a first shielding layer wrapping the first signal line and the second signal line, the second connecting line comprises a third signal line, a fourth signal line and a second shielding layer wrapping the third signal line and the fourth signal line, two ends of the first signal line are connected with the first connecting end and the first signal end respectively, two ends of the second signal line are connected with the first shorting end and the second signal end respectively, two ends of the third signal line are connected with the second shorting end and the third signal end respectively, two ends of the fourth signal line are connected with the second connecting end and the fourth signal end respectively, the first shielding layer and the second shielding layer are grounded.

7. A control system characterized by, Comprise: A first device, a second device and a signal transmission structure between multiple devices as claimed in any one of claims 1 to 6.

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