CN114136163B - Explosion-proof authentication device - Google Patents
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- CN114136163B CN114136163B CN202111073254.2A CN202111073254A CN114136163B CN 114136163 B CN114136163 B CN 114136163B CN 202111073254 A CN202111073254 A CN 202111073254A CN 114136163 B CN114136163 B CN 114136163B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
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- F42D1/05—Electric circuits for blasting
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Abstract
The embodiment of the invention discloses an explosion-proof authentication device. The explosion-proof authentication device includes: the device comprises a power supply module, a filtering module, an explosion-proof authentication circuit and a device wiring terminal; the power supply module is electrically connected with the filtering module, and the filtering module is electrically connected with the explosion-proof authentication circuit; the anti-explosion authentication circuit is used for forming a corresponding anti-explosion authentication loop according to the type of the equipment accessed by the equipment wiring terminal; the device types include at least a first type of device, a second type of device, and a third type of device. Therefore, the anti-explosion authentication device provided by the invention can form a corresponding anti-explosion authentication circuit according to the type of the accessed equipment, and can realize anti-explosion authentication on various types of equipment. And the power supply module is arranged to supply power to the accessed equipment when the equipment is not externally powered.
Description
Technical Field
The embodiment of the invention relates to the technical field of explosion-proof authentication, in particular to an explosion-proof authentication device.
Background
Some industrial control systems are required to be explosion-proof, and such field explosion-proof equipment needs to transmit signals to the control system to realize signal conversion or control of the field devices. In order to meet the explosion-proof requirement and ensure the stability and reliability of the system, the middle part of the system is required to be connected with a safety grating for signal conversion, and the conventional safety grating is divided into AI, AO, DI, DO product types, so that four explosion-proof authentications exist correspondingly.
However, the existing anti-explosion authentication method designs an authentication circuit for one product type separately, which results in that each product type needs to be designed with separate authentication, the design work is complex, the design period is long, and the corresponding cost is high.
Disclosure of Invention
The invention provides an explosion-proof authentication device, which is used for realizing explosion-proof authentication on safety grids of various signal transmission types, simplifying the authentication design period and complexity and reducing the authentication cost.
The embodiment of the invention provides an explosion-proof authentication device, which comprises: the device comprises a power supply module, a filtering module, an explosion-proof authentication circuit and a device wiring terminal; the power supply module is electrically connected with the filtering module and is used for providing power when the equipment accessed by the equipment wiring terminal has no external power supply; the filtering module is electrically connected with the explosion-proof authentication circuit and is used for filtering the power inlet wire output by the power supply module and outputting the power inlet wire to the explosion-proof authentication circuit; the anti-explosion authentication circuit is used for forming a corresponding anti-explosion authentication loop according to the type of the equipment to which the equipment wiring terminal is connected; the device types at least comprise a first type device, a second type device and a third type device.
Optionally, the explosion-proof authentication circuit comprises an anti-reflection module, a first voltage division module, a second voltage division module, a third voltage division module, a first explosion-proof module, a second explosion-proof module and a third explosion-proof module; the anti-reflection module is electrically connected with the filtering module, the first voltage division module and the first explosion-proof module; the first voltage dividing module is electrically connected with a first end of the equipment wiring terminal, the first explosion-proof module is electrically connected with the second explosion-proof module and the second voltage dividing module, and the second voltage dividing module is electrically connected with a second end of the equipment wiring terminal; the second explosion-proof module is electrically connected with the filtering module and the third voltage dividing module; the third voltage dividing module is electrically connected with the fourth end of the equipment wiring terminal; and the third explosion-proof module is respectively and electrically connected with the filtering module and a third end of the equipment wiring terminal.
Optionally, when the first end and the fourth end of the equipment wiring terminal are connected to the first type of equipment, the first voltage dividing module, the equipment wiring terminal, the third voltage dividing module, the second explosion-proof module and the first explosion-proof module form a first explosion-proof authentication loop;
when the first end and the third end of the equipment wiring terminal are connected to the second type of equipment, the first voltage division module, the first explosion-proof module, the second explosion-proof module, the filtering module, the third explosion-proof module and the equipment wiring terminal form a second explosion-proof authentication loop;
when the second end and the fourth end of the equipment wiring terminal are connected to the third type of equipment, the second explosion-proof module, the second voltage dividing module, the equipment wiring terminal and the third voltage dividing module form a third explosion-proof authentication loop.
Optionally, the anti-reflection module is a first diode, an anode of the first diode is electrically connected with the filtering module, and a cathode of the first diode is electrically connected with the first voltage division module and the first explosion-proof module respectively.
Optionally, the first explosion-proof module at least comprises a first voltage stabilizing tube; the second explosion-proof module at least comprises a second voltage stabilizing tube, the anode of the first voltage stabilizing tube is respectively and electrically connected with the cathode of the second voltage stabilizing tube and the second voltage dividing module, the cathode of the first voltage stabilizing tube is respectively and electrically connected with the anti-reflection module and the first voltage dividing module, and the anode of the second voltage stabilizing tube is respectively and electrically connected with the filtering module and the third voltage dividing module; the third explosion-proof module at least comprises a second diode, a third diode and a fourth diode which are connected in series, wherein the anode of the second diode is electrically connected with the filtering module, the cathode of the second diode is electrically connected with the anode of the third diode, the cathode of the third diode is electrically connected with the anode of the fourth diode, and the cathode of the fourth diode is electrically connected with the third end of the equipment wiring terminal.
Optionally, the first explosion-proof module further includes a third voltage regulator tube, the second explosion-proof module further includes a fourth voltage regulator tube, an anode of the third voltage regulator tube is electrically connected with a cathode of the fourth voltage regulator tube and the second voltage dividing module respectively, a cathode of the third voltage regulator tube is electrically connected with the anti-reflection module and the first voltage dividing module respectively, and an anode of the fourth voltage regulator tube is electrically connected with the filtering module and the third voltage dividing module respectively.
Optionally, the first voltage dividing module includes at least a first resistor and a second resistor connected in series; the second voltage dividing module at least comprises a third resistor and a fourth resistor which are connected in series; the third voltage dividing module at least comprises a fifth resistor and a sixth resistor which are connected in series.
Optionally, the first type device is an AI, AO and DO passive type security gate; the second type of equipment is an AI active type safety grid; the third type of equipment is a DI passive type safety grid.
Optionally, the power supply module includes a transformer, a fifth diode, a sixth diode, a first energy storage unit and a second energy storage unit, a first end of the transformer is electrically connected with an anode of the fifth diode and a cathode of the sixth diode respectively, a cathode of the fifth diode is electrically connected with a first end of the first energy storage unit, a second end of the first energy storage unit is electrically connected with a second end of the transformer and a first end of the second energy storage unit respectively, and a second end of the second energy storage unit is electrically connected with an anode of the sixth diode and a ground end respectively.
Optionally, the filtering module includes a common-mode inductor, a first capacitor, a second capacitor, a first inductor and a second inductor, where a first end and a second end of the common-mode inductor are electrically connected to the power supply module, a third end of the common-mode inductor is electrically connected to the first end of the first capacitor and the first end of the first inductor, a fourth end of the common-mode inductor is electrically connected to the second end of the first capacitor and the first end of the second inductor, and a second end of the first inductor and the second end of the second inductor are electrically connected to the explosion-proof authentication circuit, and the second capacitor is connected between the second end of the first inductor and the second end of the second inductor; the first capacitor, the second capacitor, the first inductor and the second inductor form a pi-type filter network.
The invention provides an explosion-proof authentication device, which comprises: the device comprises a power supply module, a filtering module, an explosion-proof authentication circuit and a device wiring terminal; the power supply module is electrically connected with the filtering module and is used for providing power when the equipment accessed by the equipment wiring terminal has no external power supply; the filtering module is electrically connected with the explosion-proof authentication circuit and is used for filtering the power inlet wire output by the power supply module and outputting the power inlet wire to the explosion-proof authentication circuit; the anti-explosion authentication circuit is used for forming a corresponding anti-explosion authentication loop according to the type of the equipment accessed by the equipment wiring terminal; the device types at least comprise a first type device, a second type device and a third type device. Therefore, the anti-explosion authentication device provided by the invention can form a corresponding anti-explosion authentication circuit according to the type of the accessed equipment, and can realize anti-explosion authentication on various types of equipment. And the power supply module is arranged to supply power to the accessed equipment when the equipment is not externally powered.
Drawings
Fig. 1 is a block diagram of an explosion-proof authentication apparatus in a first embodiment of the present invention;
fig. 2 is a block diagram of an explosion-proof authentication apparatus in a second embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of an explosion-proof authentication device according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first explosion-proof authentication loop in a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second explosion-proof authentication circuit in the second embodiment of the present invention;
fig. 6 is a schematic structural diagram of a third explosion-proof authentication circuit in the second embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a block diagram of an explosion-proof authentication device according to a first embodiment of the present invention. Referring to fig. 1, the explosion proof authentication apparatus includes: the device comprises a power supply module 10, a filtering module 20, an explosion-proof authentication circuit 30 and a device wiring terminal 40; the power supply module 10 is electrically connected with the filtering module 20 and is used for providing power when the equipment connected with the equipment wiring terminal 40 has no external power supply; the filtering module 20 is electrically connected with the explosion-proof authentication circuit 30, and is used for filtering the power inlet wire output by the power supply module 10 and outputting the filtered power inlet wire to the explosion-proof authentication circuit 30; the explosion-proof authentication circuit 30 is used for forming a corresponding explosion-proof authentication loop according to the type of the equipment to which the equipment wiring terminal 40 is connected; the device types at least comprise a first type device, a second type device and a third type device.
The power supply module 10 may be used to provide power to a passive device when the device to which the device connection terminal 40 is connected is a passive device. The filtering module 20 is configured to perform filtering processing on the voltage output by the power supply module 10, and then provide a stable and reliable voltage to the explosion-proof authentication circuit 30 and the passive device with a power supply voltage.
The first type of device and the third type of device can be passive type devices, and the second type of device can be active type devices. The signal transmission types of the first type device, the second type device and the third type device are different, for example, the first type device can be an analog input and passive type device, an analog output passive type device, a digital input and passive type device and the like; the second type of device may be an analog input and active type device; the third class of devices may be digital output and passive devices.
Specifically, the explosion-proof authentication circuit 30 may form a corresponding explosion-proof authentication loop according to the type of the device to which the device connection terminal 40 is connected, for example, assuming that the first type of device is analog output and passive type device, the power supply module 10 outputs a power supply voltage to the explosion-proof authentication circuit 30 after filtering the power supply voltage by the filtering module 20, and the explosion-proof authentication circuit 30 may form a corresponding explosion-proof authentication loop according to the first type of device to implement explosion-proof authentication on the first type of device; for example, assuming that the second type of device is an analog input and an active type of device, since the second type of device is an active type of device, an external power source device can provide power for the second type of device, and thus, an external power source flows into the explosion-proof authentication circuit 30 through the device connection terminal 40, and the explosion-proof authentication circuit 30 can form a corresponding explosion-proof authentication loop according to the second type of device, so as to realize explosion-proof authentication on the second type of device; for example, assuming that the third type of equipment is digital input and passive equipment, the power supply module 10 outputs a power supply voltage to the explosion-proof authentication circuit 30 after filtering by the filtering module 20, and the explosion-proof authentication circuit 30 can form a corresponding explosion-proof authentication loop according to the third type of equipment to realize explosion-proof authentication on the third type of equipment. Therefore, the first type of equipment, the second type of equipment and the third type of equipment can be subjected to explosion-proof authentication through the explosion-proof authentication device, and compared with the prior art that an independent explosion-proof authentication method is designed for different types of equipment, the complexity of the explosion-proof authentication design is simplified, the design period is shortened, and the design cost is reduced.
According to the technical scheme of the embodiment, the anti-explosion authentication device comprises: the device comprises a power supply module, a filtering module, an explosion-proof authentication circuit and a device wiring terminal; the power supply module is electrically connected with the filtering module and is used for providing power when the equipment accessed by the equipment wiring terminal has no external power supply; the filtering module is electrically connected with the explosion-proof authentication circuit and is used for filtering the power inlet wire output by the power supply module and outputting the power inlet wire to the explosion-proof authentication circuit; the anti-explosion authentication circuit is used for forming a corresponding anti-explosion authentication loop according to the type of the equipment accessed by the equipment wiring terminal; the device types at least comprise a first type device, a second type device and a third type device. Therefore, the anti-explosion authentication device provided by the invention can form a corresponding anti-explosion authentication circuit according to the type of the accessed equipment, and can realize anti-explosion authentication on various types of equipment. And the power supply module is arranged to supply power to the accessed equipment when the equipment is not externally powered.
Example two
Fig. 2 is a block diagram of an explosion-proof authentication apparatus according to a second embodiment of the present invention, fig. 3 is a schematic circuit diagram of an explosion-proof authentication apparatus according to a second embodiment of the present invention, fig. 4 is a schematic diagram of a first explosion-proof authentication circuit according to a second embodiment of the present invention, fig. 5 is a schematic diagram of a second explosion-proof authentication circuit according to a second embodiment of the present invention, and fig. 6 is a schematic diagram of a third explosion-proof authentication circuit according to a second embodiment of the present invention. Optionally, referring to fig. 2, the explosion-proof authentication circuit 30 includes an anti-module 31, a first voltage division module 32, a second voltage division module 33, a third voltage division module 34, a first explosion-proof module 35, a second explosion-proof module 36, and a third explosion-proof module 37; wherein the anti-reflection module 31 is electrically connected with the filtering module 20, the first voltage division module 32 and the first explosion-proof module 35; the first voltage dividing module 32 is electrically connected with the first end A1 of the equipment wiring terminal 40, the first explosion-proof module 35 is electrically connected with the second explosion-proof module 36 and the second voltage dividing module 33, and the second voltage dividing module 33 is electrically connected with the second end A2 of the equipment wiring terminal 40; the second explosion-proof module 36 is electrically connected with the filtering module 20 and the third voltage dividing module 34; the third voltage dividing module 34 is electrically connected with the fourth end A4 of the equipment wiring terminal 40; the third explosion-proof module 37 is electrically connected to the third terminal A3 of the filter module 20 and the device connection terminal 40, respectively.
The anti-reflection module 30 is configured to provide the voltage output by the power supply module 10 to a passive device when the passive device is connected to the first end A1 of the device connection terminal 40, so as to provide power to the passive device.
Optionally, with continued reference to fig. 2, when the first end A1 and the fourth end A4 of the device connection terminal 40 access the first type of device, the first voltage dividing module 32, the device connection terminal 40, the third voltage dividing module 34, the second explosion-proof module 36 and the first explosion-proof module 35 form a first explosion-proof authentication loop;
when the first end A1 and the third end A3 of the equipment wiring terminal 40 are connected to the second type of equipment, the first voltage division module 32, the first explosion-proof module 35, the second explosion-proof module 36, the filtering module 20, the third explosion-proof module 37 and the equipment wiring terminal 40 form a second explosion-proof authentication loop;
when the second end A2 and the fourth end A4 of the device connection terminal 40 are connected to the third type of device, the second explosion-proof module 36, the second voltage dividing module 33, the device connection terminal 40 and the third voltage dividing module 34 form a third explosion-proof authentication loop.
When the first end A1 and the fourth end A4 of the device connection terminal 40 are connected to the first type device, the voltage output by the power supply module 10 is filtered by the filtering module 20 and then output to the anti-reverse module 31 to be conducted, and after the anti-reverse module 31 is conducted, the first voltage division module 32, the device connection terminal 40, the third voltage division module 34, the second explosion-proof module 36 and the first explosion-proof module 35 form a first explosion-proof authentication loop. In the first explosion proof authentication circuit, the explosion proof authentication parameters of the first type of equipment are related to the first voltage division module 32, the third voltage division module 34, the second explosion proof module 36 and the first explosion proof module 35. The explosion-proof authentication parameters of the first type of equipment comprise voltage authentication parameters and current authentication parameters. Wherein the voltage authentication parameter is related to the sum of the series voltages of the second explosion-proof module 36 and the first explosion-proof module 35, and the current authentication parameter is related to the sum of the series voltages of the second explosion-proof module 36 and the first explosion-proof module 35 and the sum of the series resistances of the first voltage dividing module 32 and the third voltage dividing module 34.
When the first end A1 and the third end A3 of the device connection terminal 40 are connected to the second type device, the second type device is an active device, and an external power source supplies power to the second type device, and a voltage provided by the external power source flows into the first voltage division module 32 through the first end A1 of the device connection terminal 40, so that the first voltage division module 32, the first explosion-proof module 35, the second explosion-proof module 36, the filtering module 20, the third explosion-proof module 37 and the device connection terminal 40 form a second explosion-proof authentication loop. In the second explosion proof authentication circuit, the explosion proof authentication parameters of the second type of equipment are related to the first voltage division module 32, the first explosion proof module 35, the second explosion proof module 36, and the third explosion proof module 37. The second type of explosion-proof authentication parameter is a voltage authentication parameter, and the voltage authentication parameter is related to the sum of series voltages of the first explosion-proof module 35, the second explosion-proof module 36, and the third explosion-proof module 37. Furthermore, since the power of the second type of device is provided by an external power source, there is no need to authenticate the current parameter.
When the second end A2 and the fourth end A4 of the device connection terminal 40 are connected to the third type device, the voltage output by the power supply module 10 is filtered by the filtering module 20 and then output to the anti-reverse module 31 to be conducted, and after the anti-reverse module 31 is conducted, the second voltage dividing module 33, the device connection terminal 40, the third voltage dividing module 34 and the second explosion-proof module 36 form a third explosion-proof authentication loop. In the third explosion proof authentication circuit, the explosion proof authentication parameters of the third class of devices are related to the second voltage dividing module 33, the third voltage dividing module 34, and the second explosion proof module 36. The explosion-proof authentication parameters of the third type of equipment comprise voltage authentication parameters and current authentication parameters. Wherein the voltage authentication parameter is related to the voltage of the second explosion-proof module 36, and the current authentication parameter is related to the sum of the voltage of the second explosion-proof module 36 and the series resistance of the second voltage dividing module 33 and the third voltage dividing module 34.
Optionally, the first type of device is an AI, AO and D0 passive type security gate; the second type of equipment is an AI active type safety grid; the third type of device is a DI passive type security barrier.
The AI passive type safety grating and the AI active type safety grating are of analog input type, the AO passive type safety grating is of analog output type, and the D0 passive type safety grating is of digital output type; the signal type of the DI passive type safety barrier is a digital quantity input type.
Exemplary, wherein the AI passive type may be the present An Biansong machine; the AI active type can be an intrinsic safety current source; the AO passive type can be the present stabilizer valve; the DO passive type can be an intrinsic safety electromagnetic valve; the DI passive type may be an intrinsic safety proximity switch.
Alternatively, referring to fig. 2 and 3, the anti-reflection module 31 is a first diode D1, an anode of the first diode D1 is electrically connected to the filtering module 20, and a cathode of the first diode D1 is electrically connected to the first voltage division module 32 and the first explosion-proof module 35, respectively.
The first diode D1 is an anti-reflection diode.
Optionally, with continued reference to fig. 2 and 3, the first explosion-proof module 35 includes at least a first voltage regulator tube ZD1; the second explosion-proof module 36 at least comprises a second voltage stabilizing tube ZD2, the anode of the first voltage stabilizing tube ZD1 is respectively and electrically connected with the cathode of the second voltage stabilizing tube ZD2 and the second voltage dividing module 33, the cathode of the first voltage stabilizing tube ZD1 is respectively and electrically connected with the anti-reverse module 31 and the first voltage dividing module 32, and the anode of the second voltage stabilizing tube ZD2 is respectively and electrically connected with the filtering module 20 and the third voltage dividing module 34; the third explosion-proof module 37 includes at least a second diode D2, a third diode D3, and a fourth diode D4 connected in series, an anode of the second diode D2 is electrically connected to the filter module 20, a cathode of the second diode D2 is electrically connected to an anode of the third diode D3, a cathode of the third diode D3 is electrically connected to an anode of the fourth diode D4, and a cathode of the fourth diode D4 is electrically connected to a third end of the device connection terminal 40.
Optionally, with continued reference to fig. 2 and 3, the first explosion-proof module 35 further includes a third voltage regulator ZD3, the second explosion-proof module 36 further includes a fourth voltage regulator ZD4, an anode of the third voltage regulator ZD3 is electrically connected with a cathode of the fourth voltage regulator ZD4 and the second voltage dividing module 33, respectively, a cathode of the third voltage regulator ZD3 is electrically connected with the anti-reflection module 31 and the first voltage dividing module 32, respectively, and an anode of the fourth voltage regulator ZD4 is electrically connected with the filtering module 20 and the third voltage dividing module 34, respectively.
The third voltage regulator tube ZD3 is used as a redundant design of the first voltage regulator tube ZD1, and its structure and function are the same as those of the first voltage regulator tube ZD 1. The fourth regulator tube ZD4 is used as a redundant design of the second regulator tube ZD2, and its structure and function are the same as those of the second regulator tube ZD 2.
Optionally, with continued reference to fig. 2 and 3, the first voltage divider module 32 includes at least a first resistor R1 and a second resistor R2 connected in series; the second voltage dividing module 33 includes at least a third resistor R3 and a fourth resistor R4 connected in series; the third voltage dividing module 34 includes at least a fifth resistor R5 and a sixth resistor R6 connected in series.
The first end of the first resistor R1 is electrically connected with the cathode of the first diode D1, the cathode of the first voltage stabilizing tube ZD1 and the cathode of the third voltage stabilizing tube ZD3, the second end of the first resistor R1 is electrically connected with the first end of the second resistor R2, and the second end of the second resistor R2 is electrically connected with the first end A1 of the equipment wiring terminal 40; the first end of the third resistor R3 is electrically connected with the anode of the first voltage stabilizing tube ZD1, the cathode of the second voltage stabilizing tube ZD2, the anode of the third voltage stabilizing tube ZD3 and the cathode of the fourth voltage stabilizing tube ZD4, the second end of the third resistor R3 is electrically connected with the first end of the fourth resistor R4, and the second end of the fourth resistor R4 is electrically connected with the second end A2 of the equipment wiring terminal 40; the first end of the fifth resistor R5 is electrically connected to the filter module 20, the anode of the second voltage stabilizing tube ZD2, and the anode of the fourth voltage stabilizing tube ZD4, the second end of the fifth resistor R5 is electrically connected to the first end of the sixth resistor R6, and the second end of the sixth resistor R6 is electrically connected to the fourth end A4 of the device connection terminal 40.
Alternatively, referring to fig. 3, the power supply module 10 includes a transformer B1, a fifth diode D5, a sixth diode D6, a first energy storage unit 11 and a second energy storage unit 12, wherein a first end of the transformer B1 is electrically connected to an anode of the fifth diode D5 and a cathode of the sixth diode D6, respectively, a cathode of the fifth diode D5 is electrically connected to a first end of the first energy storage unit 11, a second end of the first energy storage unit 11 is electrically connected to a second end of the transformer B1 and a first end of the second energy storage unit 12, respectively, and a second end of the second energy storage unit 12 is electrically connected to an anode of the sixth diode D6 and a ground GND, respectively.
When the first end of the transformer B1 is positive and the second end is negative, the first end of the transformer B1, the fifth diode D5, the first energy storage unit 11 and the second end of the transformer B1 form a first charging loop, and the transformer B1 charges the first energy storage unit 11; when the first end of the transformer B1 is negative and the second end is positive, the first end of the transformer B1, the sixth diode D6, the second energy storage unit 12 and the second end of the transformer B1 form a second charging loop, and the transformer B1 charges the second energy storage unit 12, so that the power supply terminal VCC obtains a voltage 2 times. Thus, the power module 10 may also be referred to as a two-time voltage module for providing power to a passive device when the device terminals are connected to the passive device.
Wherein the first energy storage unit 11 comprises at least two capacitive elements connected in parallel, a third capacitance C3 and a fourth capacitance C4 as shown in fig. 3; the second energy storage unit 12 comprises at least two capacitive elements connected in parallel, such as a fifth capacitor C5 and a sixth capacitor C6 shown in fig. 3. The number of capacitive elements connected in parallel between the first energy storage unit 11 and the second energy storage unit 12 may be set according to practical situations, and is not specifically limited herein.
Optionally, with continued reference to fig. 3, the filtering module 20 includes a common-mode inductor L0, a first capacitor C1, a second capacitor C2, a first inductor L1 and a second inductor L2, where a first end and a second end of the common-mode inductor L0 are electrically connected to the power supply module 10, a third end of the common-mode inductor L0 is electrically connected to the first end of the first capacitor C1 and the first end of the first inductor L1, a fourth end of the common-mode inductor L0 is electrically connected to the second end of the first capacitor C1 and the first end of the second inductor L2, a second end of the first inductor L1 and the second end of the second inductor L2 are electrically connected to the explosion-proof authentication circuit 30, and the second capacitor C2 is connected between the second end of the first inductor L1 and the second end of the second inductor L2; the first capacitor C1, the second capacitor C2, the first inductor L1 and the second inductor L2 form a pi-type filter network.
The common mode inductor L0 is used for filtering common mode interference in the circuit. The first capacitor C1, the second capacitor C2, the first inductor L1 and the second inductor L2 form a pi-type filter network for providing a more stable and reliable supply voltage for the subsequent explosion-proof authentication circuit 30 and the device.
In addition, referring to fig. 3, the filtering module 20 further includes a fuse F0, and the fuse F0 is connected between the power supply terminal VCC and the first terminal of the common-mode inductance L0 for preventing overcurrent and protecting a circuit.
Optionally, referring to fig. 3, the explosion-proof authentication circuit 30 further includes a third inductor L3, a fourth inductor L4, a seventh capacitor C7, a transistor T1, a seventh resistor R7, and an eighth resistor R8. The third inductor L3 is electrically connected to the second end of the second resistor R2 and the first end A1 of the device connection terminal 40; the fourth inductor L4 is electrically connected to the second end of the sixth resistor R6 and the fourth end A4 of the device terminal 40, respectively; the first end of the seventh capacitor C7 is electrically connected to the second end of the second resistor R2 and the first end of the third inductor L3, respectively, and the second end of the seventh capacitor C7 is electrically connected to the second end of the sixth resistor R6 and the first end of the fourth inductor L4, respectively. The first end of the transistor T1 is electrically connected to the first end of the second capacitor C2 of the filter module 20 through the seventh resistor R7, the second end of the transistor T1 is electrically connected to the first end of the fifth resistor R5, the third end of the transistor T1 is electrically connected to the second end of the second capacitor C2, and the transistor T1 is used for adjusting the current of the circuit so as to ensure the accuracy of the current of the circuit. An eighth resistor R8 is connected between the second terminal and the third terminal of the transistor T1 for current limiting.
The transistor T1 may be a MOS transistor or a triode. Further, the transistor can be an NPN type MOS transistor or triode.
Further, referring to fig. 3, the explosion-proof authentication circuit 30 further includes three voltage stabilizing tubes connected in reverse series, a first voltage stabilizing tube TVS1 connected in reverse series, a second voltage stabilizing tube TVS2 connected in reverse series, and a third voltage stabilizing tube TVS3 connected in reverse series as shown in the figure, for use as surge protection.
For example, referring to fig. 4, the implementation procedure of the first explosion-proof authentication loop S1 is: for example, when the first end A1 and the fourth end A4 of the device connection terminal 40 are connected to a first type device, such as the AI passive resistor An Biansong, the power supply end VCC of the power supply module 10 outputs the power supply voltage to the first diode D1 after the filtering function of the filtering module 20, so that the first diode D1 is turned on, after the first diode D1 is turned on, the power supply voltage flows into the first end A1 of the device connection terminal 40 through the first resistor R1, the second resistor R2, the third inductor L3 to supply power to the resistor An Biansong, and then flows back to the filtering module 20 through the fourth end A4, the fourth resistor L4, the fifth resistor R5, the sixth resistor R6, and the transistor T1 of the device connection terminal 40, so that the first resistor R1, the second resistor R2, the third inductor L3, the device connection terminal 40, the fourth resistor L4, the fifth resistor R5, the sixth resistor R6, the first voltage regulator ZD1 and the second voltage regulator ZD2 form a first explosion-proof authentication loop. According to the first explosion-proof authentication loop, the authentication parameters of the An Biansong device are voltage authentication parameters and current authentication parameters. The voltage authentication parameter is the sum of the series voltages of the first voltage stabilizing tube ZD1 and the second voltage stabilizing tube ZD2, and the current authentication parameter is determined by the ratio of the sum of the series voltages of the first voltage stabilizing tube ZD1 and the second voltage stabilizing tube ZD2 to the sum of the series resistances of the first resistor R1, the second resistor R2, the fifth resistor R5 and the sixth resistor R6.
In addition, the third voltage regulator tube ZD3 and the fourth voltage regulator tube ZD4 are used as redundancy designs of the first voltage regulator tube ZD1 and the second voltage regulator tube ZD2, the first resistor R1, the second resistor R2, the third inductor L3, the equipment connecting terminal 40, the fourth inductor L4, the fifth resistor R5, the sixth resistor R6, the third voltage regulator tube ZD3 and the fourth voltage regulator tube ZD4 can also form an authentication loop which is the same as the first explosion-proof authentication loop S1, and on one hand, the first voltage regulator tube ZD1 and the second voltage regulator tube ZD2 can be replaced to carry out explosion-proof authentication on the first equipment when the first voltage regulator tube ZD1 and the second voltage regulator tube ZD2 are damaged, and on the other hand, the second voltage regulator tube ZD2 can be used for mutual inspection so as to find problems timely.
The first explosion-proof authentication circuit S1 may be used to authenticate AI-passive, DI-passive, or AI-passive devices. In addition, parameters of components such as the first resistor R1, the second resistor R2, the third inductor L3, the fourth inductor L4, the fifth resistor R5, the sixth resistor R6, the first voltage regulator ZD1, the second voltage regulator ZD2, and the like may be set according to actual situations, and are not specifically limited herein.
For example, referring to fig. 5, the implementation procedure of the second explosion-proof authentication loop S2 is: for example, when the first end A1 and the third end A3 of the device connection terminal 40 are connected to a second type device, such as an AI active type intrinsic safety current source, because the active type intrinsic safety current source is provided by an external device, a voltage provided by the external device flows in through the first end A1 of the device connection terminal 40 and flows into the third inductor L3, the second resistor R2, the first resistor R1, the first zener diode ZD1, the second zener diode ZD2, the transistor T1, the filter module 20, and flows back from the second diode D2, the third diode D3, and the fourth diode D4 to the fourth end A4 of the device connection terminal 40, thereby forming a second explosion-proof authentication loop S2 by the third inductor L3, the second resistor R2, the first resistor R1, the first zener diode ZD1, the second zener diode ZD2, the second diode D2, the third diode D3, the fourth diode D4, and the device connection terminal 40. According to the second explosion-proof authentication loop S2, the authentication parameter of the intrinsic safety current source is a voltage authentication parameter. The voltage authentication parameter is the sum of the series voltages of the first voltage stabilizing tube ZD1 and the second voltage stabilizing tube ZD 2. Furthermore, since the power of the second type of device is provided by an external power source, there is no need to authenticate the current parameter.
In addition, the third voltage regulator ZD3 and the fourth voltage regulator ZD4 are used as redundancy designs of the first voltage regulator ZD1 and the second voltage regulator ZD2, the third inductor L3, the second resistor R2, the first resistor R1, the third voltage regulator ZD3, the fourth voltage regulator ZD4, the second diode D2, the third diode D3, the fourth diode D4 and the device connection terminal 40 can also form an authentication loop which is the same as the second explosion-proof authentication loop S2, and can be used for replacing the first voltage regulator ZD1 and the second voltage regulator ZD2 to carry out explosion-proof authentication on the second type of devices when the first voltage regulator ZD1 and the second voltage regulator ZD2 are damaged, and can be used for mutual inspection so as to find problems in time.
The second explosion-proof authentication circuit S2 may be used to authenticate an AI-active device. In addition, parameters of components such as the third inductor L3, the second resistor R2, the first resistor R1, the first voltage regulator ZD1, the second voltage regulator ZD2, the second diode D2, the third diode D3, and the fourth diode D4 may be set according to actual situations, and are not limited herein specifically.
For example, referring to fig. 6, the implementation procedure of the third explosion-proof authentication loop S3 is: for example, when the second end A2 and the fourth end A4 of the device connection terminal 40 are connected to a third type of device, such as an intrinsic safety proximity switch, the power supply voltage output by the power supply end VCC of the power supply module 10 is filtered by the filtering module 20 and then output to the first diode D1, so that the first diode D1 is turned on, after the first diode D1 is turned on, the power supply voltage flows into the second end A2 of the device connection terminal 40 through the first voltage regulator ZD1, the third resistor R3 and the fourth resistor R4, and then supplies power to the intrinsic safety proximity switch, and then flows back to the filtering module 20 through the fourth end A4, the fourth resistor L4, the fifth resistor R5, the sixth resistor R6 and the transistor T1 of the device connection terminal 40, thereby forming a third explosion-proof authentication loop S3 by the third resistor R3, the fourth resistor R4, the device connection terminal 40, and the second voltage regulator ZD 2. According to the third explosion-proof authentication loop S3, the authentication parameters of the intrinsic safety proximity switch are voltage authentication parameters and current authentication parameters. The voltage authentication parameter is the voltage of the second voltage stabilizing tube ZD2, and the current authentication parameter is determined by the ratio of the voltage of the second voltage stabilizing tube ZD2 to the sum of the series resistances of the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6.
In addition, the third voltage stabilizing tube ZD3 and the fourth voltage stabilizing tube ZD4 are used as redundancy designs of the first voltage stabilizing tube ZD1 and the second voltage stabilizing tube ZD2, the third resistor R3, the fourth resistor R4, the equipment connecting terminal 40, the fourth inductor L4, the fifth resistor R5, the sixth resistor R6 and the fourth voltage stabilizing tube ZD4 can also form an authentication loop which is the same as the third explosion-proof authentication loop S3, and the authentication loop can be used for replacing the first voltage stabilizing tube ZD1 and the second voltage stabilizing tube ZD2 to carry out explosion-proof authentication on a third type of equipment when the first voltage stabilizing tube ZD1 and the second voltage stabilizing tube ZD2 are damaged, and can be used for mutual inspection so as to find problems in time.
The third explosion-proof authentication circuit S3 may be used to authenticate a DI passive type device. In addition, parameters of components such as the third resistor R3, the fourth resistor R4, the fourth inductor L4, the fifth resistor R5, the sixth resistor R6, the second regulator tube ZD2, and the like may be set according to actual situations, and are not specifically limited herein.
Therefore, the first type of equipment, the second type of equipment and the third type of equipment can be subjected to explosion-proof authentication through the explosion-proof authentication device, and compared with the prior art that an independent explosion-proof authentication method is designed for different types of equipment, the complexity of the explosion-proof authentication design is simplified, the design period is shortened, and the design cost is reduced.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (9)
1. An explosion proof authentication device, comprising: the device comprises a power supply module, a filtering module, an explosion-proof authentication circuit and a device wiring terminal; the power supply module is electrically connected with the filtering module and is used for providing power when the equipment accessed by the equipment wiring terminal has no external power supply; the filtering module is electrically connected with the explosion-proof authentication circuit and is used for filtering the power inlet wire output by the power supply module and outputting the power inlet wire to the explosion-proof authentication circuit; the anti-explosion authentication circuit is used for forming a corresponding anti-explosion authentication loop according to the type of the equipment to which the equipment wiring terminal is connected; the device types at least comprise a first type device, a second type device and a third type device;
the explosion-proof authentication circuit comprises an anti-reflection module, a first voltage division module, a second voltage division module, a third voltage division module, a first explosion-proof module, a second explosion-proof module and a third explosion-proof module; the anti-reflection module is electrically connected with the filtering module, the first voltage division module and the first explosion-proof module; the first voltage dividing module is electrically connected with a first end of the equipment wiring terminal, the first explosion-proof module is electrically connected with the second explosion-proof module and the second voltage dividing module, and the second voltage dividing module is electrically connected with a second end of the equipment wiring terminal; the second explosion-proof module is electrically connected with the filtering module and the third voltage dividing module; the third voltage dividing module is electrically connected with the fourth end of the equipment wiring terminal; and the third explosion-proof module is respectively and electrically connected with the filtering module and a third end of the equipment wiring terminal.
2. The explosion proof authentication apparatus of claim 1, wherein the first voltage dividing module, the device wiring terminal, the third voltage dividing module, the second explosion proof module, and the first explosion proof module form a first explosion proof authentication loop when the first and fourth ends of the device wiring terminal are connected to the first type of device;
when the first end and the third end of the equipment wiring terminal are connected to the second type of equipment, the first voltage division module, the first explosion-proof module, the second explosion-proof module, the filtering module, the third explosion-proof module and the equipment wiring terminal form a second explosion-proof authentication loop;
when the second end and the fourth end of the equipment wiring terminal are connected to the third type of equipment, the second explosion-proof module, the second voltage dividing module, the equipment wiring terminal and the third voltage dividing module form a third explosion-proof authentication loop.
3. The explosion-proof authentication apparatus according to claim 1, wherein the anti-reflection module is a first diode, an anode of the first diode is electrically connected to the filter module, and a cathode of the first diode is electrically connected to the first voltage division module and the first explosion-proof module, respectively.
4. The explosion proof authentication apparatus of claim 1, wherein the first explosion proof module comprises at least a first voltage regulator tube; the second explosion-proof module at least comprises a second voltage stabilizing tube, the anode of the first voltage stabilizing tube is respectively and electrically connected with the cathode of the second voltage stabilizing tube and the second voltage dividing module, the cathode of the first voltage stabilizing tube is respectively and electrically connected with the anti-reflection module and the first voltage dividing module, and the anode of the second voltage stabilizing tube is respectively and electrically connected with the filtering module and the third voltage dividing module; the third explosion-proof module at least comprises a second diode, a third diode and a fourth diode which are connected in series, wherein the anode of the second diode is electrically connected with the filtering module, the cathode of the second diode is electrically connected with the anode of the third diode, the cathode of the third diode is electrically connected with the anode of the fourth diode, and the cathode of the fourth diode is electrically connected with the third end of the equipment wiring terminal.
5. The explosion-proof authentication apparatus according to claim 4, wherein the first explosion-proof module further comprises a third voltage regulator, the second explosion-proof module further comprises a fourth voltage regulator, an anode of the third voltage regulator is electrically connected with a cathode of the fourth voltage regulator and the second voltage dividing module, respectively, a cathode of the third voltage regulator is electrically connected with the anti-reflection module and the first voltage dividing module, respectively, and an anode of the fourth voltage regulator is electrically connected with the filter module and the third voltage dividing module, respectively.
6. The explosion proof authentication apparatus of claim 1, wherein the first voltage dividing module comprises at least a first resistor and a second resistor connected in series; the second voltage dividing module at least comprises a third resistor and a fourth resistor which are connected in series; the third voltage dividing module at least comprises a fifth resistor and a sixth resistor which are connected in series.
7. The explosion proof authentication apparatus of claim 1, wherein the first type of device is a security barrier of AI, AO and DO passive type; the second type of equipment is an AI active type safety grid; the third type of equipment is a DI passive type safety grid.
8. The explosion-proof authentication apparatus according to claim 1, wherein the power supply module comprises a transformer, a fifth diode, a sixth diode, a first energy storage unit and a second energy storage unit, wherein a first end of the transformer is electrically connected with an anode of the fifth diode and a cathode of the sixth diode, respectively, a cathode of the fifth diode is electrically connected with a first end of the first energy storage unit, a second end of the first energy storage unit is electrically connected with a second end of the transformer and a first end of the second energy storage unit, respectively, and a second end of the second energy storage unit is electrically connected with an anode of the sixth diode and a ground terminal, respectively.
9. The explosion-proof authentication apparatus according to claim 1, wherein the filter module comprises a common-mode inductor, a first capacitor, a second capacitor, a first inductor and a second inductor, the first and second ends of the common-mode inductor are electrically connected to the power supply module, the third end of the common-mode inductor is electrically connected to the first end of the first capacitor and the first end of the first inductor, the fourth end of the common-mode inductor is electrically connected to the second end of the first capacitor and the first end of the second inductor, the second end of the first inductor and the second end of the second inductor are electrically connected to the explosion-proof authentication circuit, and the second capacitor is connected between the second end of the first inductor and the second end of the second inductor; the first capacitor, the second capacitor, the first inductor and the second inductor form a pi-type filter network.
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| CN103916012B (en) * | 2014-04-01 | 2016-09-28 | 江苏杰瑞科技集团有限责任公司 | A kind of essential safety source conversion equipment |
| CN106505843B (en) * | 2016-12-12 | 2018-12-25 | 北京小米移动软件有限公司 | The intrinsically safe circuit of Switching Power Supply |
| CN108111001A (en) * | 2017-12-27 | 2018-06-01 | 恒安科技（中山）有限公司 | A kind of intrinsically safe power supply |
| CN211043987U (en) * | 2019-12-31 | 2020-07-17 | 上海辰竹仪表有限公司 | Industrial explosion-proof safety interface and system based on L oRaWAN technology |
| CN214757014U (en) * | 2021-02-05 | 2021-11-16 | 华荣科技股份有限公司 | Explosion-proof constant-current intrinsic safety power supply device |
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