CN218122482U - Interface multiplexing circuit and monitoring equipment - Google Patents
Interface multiplexing circuit and monitoring equipment Download PDFInfo
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- CN218122482U CN218122482U CN202222100483.5U CN202222100483U CN218122482U CN 218122482 U CN218122482 U CN 218122482U CN 202222100483 U CN202222100483 U CN 202222100483U CN 218122482 U CN218122482 U CN 218122482U
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Abstract
The utility model provides an interface multiplexing circuit and supervisory equipment relates to supervisory equipment technical field, and this interface multiplexing circuit includes: the device comprises a tail line interface, a switching circuit and a switching circuit; the controlled port of the switch circuit is used for being connected with the alarm signal output port of the monitoring equipment control circuit board, and the output control port of the switch circuit is connected with the switching control port of the switching circuit; the target switching end of the switching circuit is used for being connected with the target control end of the control circuit board, the output port of the switching circuit is connected with the alarm output port of the tail line interface, and the tail line interface is arranged outside the monitoring equipment; the switching circuit is switched on or switched off according to the signal output by the alarm signal output end; the switching circuit connects the target control end with the alarm output port when the switching circuit is in an off state. The utility model provides a technical scheme can carry out operations such as debugging, problem location of software and hardware functional module to supervisory equipment under the condition of not unpacing apart supervisory equipment, avoids damaging supervisory equipment.
Description
Technical Field
The utility model relates to a supervisory equipment technical field especially relates to an interface multiplexing circuit and supervisory equipment.
Background
Monitoring devices, such as analog cameras, internet Protocol Cameras (IPCs), and the like, play an important role in the fields of security, traffic management, industrial monitoring, and the like.
The later maintenance is an important link in the life cycle of the monitoring equipment, such as diagnosing, debugging and problem positioning the software and hardware functional modules of the monitoring equipment. In the related art, when the software and hardware functional modules of the monitoring device are maintained, the monitoring device needs to be disassembled, and corresponding circuit boards are diagnosed, debugged and the like through external leads, devices and the like, so that the monitoring device is easily damaged.
SUMMERY OF THE UTILITY MODEL
The utility model provides an interface multiplexing circuit and supervisory equipment for need unpack apart supervisory equipment and damage supervisory equipment's defect easily when maintaining supervisory equipment among the solution prior art.
The utility model provides an interface multiplexing circuit, which comprises a tail line interface, a switch circuit and a switching circuit;
the controlled port of the switch circuit is used for being connected with an alarm signal output port of a monitoring equipment control circuit board, and the output control port of the switch circuit is connected with the switching control port of the switching circuit;
the target switching end of the switching circuit is used for being connected with the target control end of the control circuit board, the output port of the switching circuit is connected with the alarm output port of the tail interface, and the tail interface is arranged outside the monitoring equipment;
the switch circuit is switched on or switched off according to the signal output by the alarm signal output port; and the switching circuit is used for communicating the target control end with the alarm output port when the switching circuit is in an off state.
According to the utility model provides a pair of interface multiplexing circuit, the target control end is the reset end, the output port of switching circuit includes first output end, the target switching end includes first switching end, the output port of reporting an emergency and asking for help or increased vigilance includes first warning output end, switching circuit includes first relay;
and a static contact of a normally closed contact of the first relay is connected with the first switching end, a movable contact is connected with a first output end of the switching circuit, the first output end is connected with the first alarm output end, and the monitoring equipment resets when the input of the first switching end is low level.
According to the utility model provides an interface multiplexing circuit, switching circuit includes first switch tube and first resistance;
the first end of the first switch tube is connected with the first controlled end of the controlled port, the second end of the first switch tube is connected with the first output control end of the output control port, the third end of the first switch tube is grounded, the first controlled end is used for being connected with the first alarm signal output end of the alarm signal output port, and the first output control end is connected with the switching control end of the first relay;
the first end of the first switch tube is grounded through the first resistor.
According to the utility model provides an interface multiplexing circuit, the target control end is serial ports debugging end, serial ports debugging end includes serial ports receiving terminal and serial ports sending terminal; the output port of the switching circuit comprises a second output end and a third output end, the target switching end comprises a second switching end and a third switching end, and the alarm output port comprises a third alarm output end and a fourth alarm output end; the second switching end is used for being connected with the serial port receiving end, and the third switching end is used for being connected with the serial port sending end;
the switching circuit is a relay circuit module, a static contact of a first normally closed contact of the relay circuit module is connected with the second switching end, a static contact of a second normally closed contact of the relay circuit module is connected with the third switching end, a first movable contact of the relay circuit module is connected with the second output end, and a second movable contact of the relay circuit module is connected with the third output end;
the second output end is connected with the third alarm output end;
and the third output end is connected with the fourth alarm output end.
According to the utility model provides an interface multiplexing circuit, the relay circuit module is double-pole double-throw relay, and the switch circuit includes second switch tube and second resistance;
the first end of the second switch tube is connected with the second controlled end of the controlled port, the second end of the second switch tube is connected with the second output control end of the output control port, the second output control end is connected with the double-pole switching control end of the double-pole double-throw relay, and the second controlled end is used for being connected with the second alarm signal output end of the alarm signal output port;
the first end of the second switch tube is grounded through the second resistor;
and the third end of the second switch tube is grounded.
According to the utility model provides an interface multiplexing circuit, relay circuit module includes second single-pole double-throw relay and third single-pole double-throw relay, switching circuit includes second switch tube, third switch tube, second resistance and third resistance;
the first end of the second switch tube is connected with the second controlled end of the controlled port and is grounded through the second resistor, the second end of the second switch tube is connected with the second output control end of the output control port, the second output control end is connected with the switching control end of the second single-pole double-throw relay, and the second controlled end is used for being connected with the second alarm signal output end of the alarm signal output port;
the first end of the third switching tube is connected with a third controlled end of the controlled port and is grounded through the third resistor, the second end of the third switching tube is connected with a third output control end of the output control port, the third output control end is connected with a switching control end of the third single-pole double-throw relay, and the third controlled end is used for being connected with a third alarm signal output end of the alarm signal output port;
the third end of the second switching tube and the third end of the third switching tube are grounded respectively;
the second single-pole double-throw relay connects the serial port receiving end with the third alarm output end when the second switching tube is in a turn-off state;
and the third single-pole double-throw relay communicates the serial port sending end with the fourth alarm output end when the third switching tube is in an off state.
According to the utility model provides an interface multiplexing circuit, still include the switch circuit, the power receiving end of switch circuit is connected with the voltage source of control circuit board, the power supply end is connected with the fifth alarm output terminal of warning output port, the control end is connected with the sixth alarm output terminal of warning output port;
the sixth alarm output end is used for being connected with the ground;
and the power supply switching circuit is conducted when the sixth alarm output end is connected with the ground, so that the power supply end supplies power to the outside through the fifth alarm output end.
According to the utility model provides an interface multiplexing circuit, the switch circuit of said power includes the fourth switch tube, the fourth resistance, the first electric capacity and the second electric capacity;
the first end of the fourth switching tube is connected with the power receiving end, the second end of the fourth switching tube is connected with the control end, and the third end of the fourth switching tube is connected with the power supply end;
one end of the fourth resistor is connected with the first end of the fourth switching tube, and the other end of the fourth resistor is connected with the second end of the fourth switching tube;
the power receiving end is grounded through the first capacitor, and the third end of the fourth switching tube is grounded through the second capacitor.
According to the utility model provides a pair of interface multiplex circuit, relay circuit module's first normally open contact's stationary contact with the fifth warning output is connected, relay circuit module's second normally open contact with the sixth warning output is connected.
The utility model also provides a monitoring device, which comprises a shell, an interface multiplexing circuit as any one of the above and a control circuit board arranged in the shell; the interface multiplexing circuit is connected with the control circuit board, and the tail line interface is arranged outside the shell.
The utility model provides an interface multiplexing circuit and supervisory equipment can establish the target control end of required control on the supervisory equipment control circuit board, when maintaining supervisory equipment and the relation of connection between the outside tail wire interface of supervisory equipment through switching circuit to through the intercommunication state of the warning output port of this target control end of switch circuit control and tail wire interface. Therefore, when the maintenance tasks such as diagnosis, debugging, problem location and the like of software and hardware functional modules of the monitoring equipment are carried out, only the alarm output port of the tail line interface is required to be operated, the monitoring equipment does not need to be disassembled, and the possible damage to the monitoring equipment is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is one of the schematic structural diagrams of the interface multiplexing circuit provided by the present invention;
fig. 2 is a second schematic structural diagram of an interface multiplexing circuit provided by the present invention;
fig. 3 is a third schematic structural diagram of an interface multiplexing circuit provided by the present invention;
fig. 4 is a fourth schematic structural diagram of the interface multiplexing circuit provided by the present invention;
fig. 5 is a fifth schematic structural diagram of the interface multiplexing circuit provided by the present invention;
fig. 6 is a sixth schematic structural diagram of the interface multiplexing circuit provided by the present invention;
fig. 7 is a schematic structural diagram of the monitoring device provided by the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that the serial numbers themselves, such as "first", "second", etc., for the components in the present invention are only used for distinguishing the described objects, and do not have any sequence or technical meaning.
The debugging serial port of the monitoring equipment can run through the whole life cycle of the monitoring equipment, including development and debugging, diagnosis, problem positioning, later maintenance and the like, and plays an important role in the whole life cycle of the monitoring equipment. However, the debugging serial port of the monitoring device is designed at the internal circuit board end, and the serial port connector is usually deleted with reduced cost, so that steps of disassembling the machine, taking out the circuit board, welding the serial port, packaging the debugging completed and the like are required when the debugging serial port is used every time, the whole process is complicated, and the monitoring device is easily damaged. In addition, the operation is more inconvenient for the monitoring device installed on the outdoor pole. Besides debugging the serial port, other software and hardware function debugging, such as a reset function and the like, have the problems as long as the dismounting requirements of the monitoring equipment are involved.
Based on this, the utility model provides an interface multiplexing circuit utilizes supervisory equipment's tail-wire to realize the multiplexing of debugging serial ports function, reset function etc.. The interface multiplexing circuit comprises a tail line interface, a switch circuit and a switching circuit; the controlled port of the switch circuit is used for being connected with the alarm signal output port of the monitoring equipment control circuit board, and the output control port of the switch circuit is connected with the switching control port of the switching circuit; the target switching end of the switching circuit is used for being connected with the target control end of the control circuit board, the output port of the switching circuit is connected with the alarm output port of the tail line interface, and the tail line interface is arranged outside the monitoring equipment; the switching circuit is switched on or off according to a signal output by the alarm signal output end, and the switching circuit is used for communicating the target control end with the alarm output end when the switching circuit is in a switching-off state. Therefore, when maintenance tasks such as diagnosis, debugging and the like of software and hardware functional modules of the monitoring equipment are carried out, only the alarm output port of the tail line interface needs to be controlled, and the monitoring equipment does not need to be dismounted.
The interface multiplexing circuit of the present invention is described below with reference to fig. 1 to 6.
Fig. 1 illustrates one of the schematic structural diagrams of the interface multiplexing circuit provided in the embodiment of the present invention, and referring to fig. 1, the interface multiplexing circuit may include a tail interface 10, a switch circuit 20, and a switching circuit 30. The controlled port ALM of the switch circuit 20 is used for being connected with an alarm signal output port of the monitoring device control circuit board, and the output control port CL of the switch circuit 20 is connected with the switching control port a of the switching circuit 30; the target switching end S of the switching circuit 30 is used for being connected with the target control end of the control circuit board, the output port P of the switching circuit 30 is connected with the alarm output port OUT of the tail interface 10, and the tail interface 10 is arranged outside the monitoring device; the switch circuit 20 is switched on or off according to a signal output by the alarm signal output port of the control circuit board; the switching circuit 30 connects the target control terminal of the control circuit board to the alarm output port OUT when the switching circuit 20 is in the off state.
The target control terminal is a terminal aimed at in a software and hardware functional module of a monitoring device control circuit board, wherein the software and hardware functional module needs to carry out target tasks such as debugging, testing and problem positioning, and the target control terminal can comprise a reset terminal or a serial port debugging terminal and the like.
The alarm signal output end of the control circuit board can output an alarm signal, when the alarm signal is output, the switch circuit 20 can be triggered to be switched on, when the alarm signal is not output, the controlled port ALM of the switch circuit 20 is equivalent to no control, and at this time, the switch circuit 20 is in a switch-off state.
When the switch circuit 20 is in an off state, the target switch terminal S of the switch circuit 30 is communicated with the alarm output port OUT, and a target control terminal connected with the target switch terminal S on the control circuit board can be connected to the alarm output port OUT of the tail line interface 10, so that controlling the alarm output port OUT is equivalent to controlling the target control terminal on the control circuit board, and tasks such as diagnosis, debugging, problem location and the like of software and hardware functional modules of the monitoring equipment can be realized without disassembling the machine.
It can be understood that the alarm signal is output from the alarm signal output port only when the alarm condition occurs, and the trigger switch circuit 20 is turned on, and in the normal state, the switch circuit 20 is in the off state, so that in the normal state, the target switch terminal S of the switch circuit 30 and the alarm output port OUT are kept in the connected state.
The interface multiplexing circuit provided in this embodiment may establish a connection relationship between a target control end on a control circuit board of the monitoring device and an external tail interface of the monitoring device through the switching circuit, and control a connection state between the target control end and an alarm output port of the tail interface through the switching circuit. Therefore, when tasks such as diagnosis, debugging and problem positioning of software and hardware function modules of the monitoring equipment are carried out, only the alarm output port of the tail line interface needs to be operated, the monitoring equipment does not need to be disassembled, and possible damage to the monitoring equipment is avoided.
Based on the interface multiplexing circuit of the corresponding embodiment in fig. 1, take this interface multiplexing circuit to realize the reset function as an example, namely take the target control end as the reset end as an example, fig. 2 exemplarily shows a second schematic structural diagram of the interface multiplexing circuit provided by the present invention.
Referring to fig. 2 in conjunction with fig. 1, the output port P of the switching circuit 30 includes a first output port P1, the target switching terminal S includes a first switching terminal RST, the alarm output port OUT includes a first alarm output terminal OUT1, the switching circuit 30 includes a first relay K1, and the first relay K1 may be, for example, a single-pole double-throw relay, and in this exemplary embodiment, the first relay K1 is exemplified as a first single-pole double-throw relay K1; a fixed contact f1 of a normally closed contact of the first single-pole double-throw relay K1 is connected with a first switching end RST, a movable contact d1 is connected with a first output end P1 of a switching circuit 30, and the first output end P1 is connected with a first alarm output end out 1; when the input of the first switching terminal RST is at a low level, the monitoring device may be reset, and then the monitoring device may be reset only by inputting a low level to the first alarm output terminal out1, for example, the first alarm output terminal out1 may be connected to ground for resetting. The power supply terminal VDD is used to supply power to the first single-pole double-throw relay K1.
Illustratively, the switch circuit 20 may include a first switch tube Q1 and a first resistor R1, a first end b1 of the first switch tube Q1 is connected to a first controlled end ALM1 of the controlled port ALM, a second end c1 is connected to a first output control end CL1 of the output control port CL, a third end e1 is grounded, the first controlled end ALM1 is configured to be connected to a first alarm signal output end of the alarm signal output port, and the first output control end CL1 is connected to a switching control end of the first single-pole double-throw relay K1; the first end b1 of the first switch tube Q1 is grounded through a first resistor R1.
According to the interface multiplexing circuit shown in fig. 2, when the first controlled terminal ALM1 is in a normal state, that is, when there is no control, the first switching tube Q1 is turned off, and the first single-pole double-throw relay K1 is controlled to be turned off, so that the contact piece of the first single-pole double-throw relay K1 contacts with the stationary contact f1 of the normally closed contact, and at this time, the first switching terminal RST can be connected to the first output terminal P1, so that the reset terminal on the monitoring device control circuit board is connected to the first alarm output terminal out 1. When the first controlled end ALM1 receives the alarm signal, the first controlled end ALM1 is at a high level, at this time, the first switching tube Q1 is turned on, the coil of the first single-pole double-throw relay K1 is energized to generate a magnetic force, so that the contact piece is switched from the stationary contact f1 of the normally closed contact to the stationary contact g1 of the normally open contact, and the alarm signal is output through the second alarm output end out2 of the tail line interface 10.
Like this, when needs use reset function, under first single-pole double throw relay K1 normally closed state, only need with first warning output end out1 ground connection, for example with the ground connection of tail wire interface 10, can draw down control circuit board's reset end, trigger control circuit board resets, need not to tear open the lid to supervisory equipment and can realize supervisory equipment resets, and easy operation, and avoided tearing open the lid and probably advance steam and lead to supervisory equipment window fog scheduling problem to and the damage that probably leads to the fact supervisory equipment among the dismouting process.
Based on the interface multiplexing circuit that fig. 1 corresponds the embodiment to this interface multiplexing circuit realizes the serial port debugging function as an example, uses the target control end to be the serial port debugging end promptly as an example, and fig. 3 exemplarily shows the utility model provides a third of the structural schematic diagram of interface multiplexing circuit. The serial port debugging end comprises a serial port receiving end and a serial port sending end.
Referring to fig. 3 in conjunction with fig. 1, the output port P of the switching circuit 30 includes a second output terminal P2 and a third output terminal P3, the target switch terminal S may include a second switch terminal RXD and a third switch terminal TXD, and the alarm output port OUT includes a third alarm output terminal OUT3 and a fourth alarm output terminal OUT4. The second switching terminal RXD is used for being connected with a serial port receiving terminal of the monitoring equipment control circuit board, and the third switching terminal TXD is used for being connected with a serial port sending terminal of the monitoring equipment control circuit board.
Illustratively, the switching circuit 30 may be a relay circuit module, such as may be a double pole double throw relay or two single pole double throw relays. A fixed contact f2 of a first normally closed contact of the relay circuit module 30 is connected with a second switching end RXD, a fixed contact f3 of a second normally closed contact is connected with a third switching end TXD, a first movable contact d2 is connected with a second output end P2, and a second movable contact d3 is connected with a third output end P3; the second output terminal P2 may be connected to the third alarm output terminal out3 through a tail; the third output terminal P3 may be connected to the fourth alarm output terminal out4 through a tail.
In this way, when the switch circuit 20 is in the off state, the fixed contact f2 of the first normally closed contact and the fixed contact f3 of the second normally closed contact of the relay circuit module 30 are connected, so as to connect the serial port receiving end connected to the second switching end RXD and the serial port transmitting end connected to the third switching end TXD on the control circuit board to the third alarm output end out3 and the fourth alarm output end out4 of the tail line interface 10, respectively. When serial port debugging is carried out, only the third alarm output end out3 and the fourth alarm output end out4 are needed to be operated, and the serial port debugging function can be realized under the condition of not disassembling the machine.
Based on the interface multiplexing circuit of the corresponding embodiment in fig. 3, in an example embodiment, the relay circuit module 30 is taken as a double-pole double-throw relay as an example, fig. 4 exemplarily shows the fourth schematic structural diagram of the interface multiplexing circuit provided by the present invention, and as shown in fig. 4, the switch circuit 20 may include a second switch tube Q2 and a second resistor R2. A first end b2 of the second switching tube Q2 is connected with a second controlled end ALM2 of the controlled port ALM, a second end c2 is connected with a second output control end CL2 of the output control port CL, the second output control end CL2 is connected with a double-pole switching control end A2 of the double-pole double-throw relay 30, and the second controlled end ALM2 is used for being connected with a second alarm signal output end of the alarm signal output port; the first end b2 of the second switch tube Q2 is grounded through a second resistor R2; the third terminal e2 of the second switch tube Q2 is grounded.
According to the interface multiplexing circuit shown in fig. 4, in a normal state, the second controlled terminal ALM2 is not controlled, the second switch tube Q2 is turned off, the double-contact blade of the double-pole double-throw relay 30 is in contact with the fixed contact f2 of the first normally closed contact and the fixed contact f3 of the second normally closed contact, at this time, the second switching terminal RXD and the third switching terminal TXD are respectively communicated with the third alarm output terminal out3 and the fourth alarm output terminal out4 of the tail line interface 10, so that the serial port debugging function can be realized by controlling the third alarm output terminal out3 and the fourth alarm output terminal out4, the monitoring device does not need to be dismounted, powered on a circuit board, soldered connectors, reassembled, and other tedious operations, the serial port debugging function is simple to realize, and damage to the monitoring device possibly caused in the process of dismounting and mounting the monitoring device is avoided.
If the second controlled end ALM2 has received the alarm signal, second controlled end ALM2 becomes the high level from no control state, second switch tube Q2 switches on this moment, power end VDD supplies power to double-pole double-throw relay 30, double-pole double-throw relay 30's double contact piece can be from the stationary contact f2 of first normally closed contact and the stationary contact f3 contact switching to the stationary contact g2 of first normally open contact and the stationary contact g3 of second normally open contact, output alarm signal through tail wire interface 10, do not influence the alarm function, be equivalent to can realize the multiplexing of serial ports debugging function on the basis of original alarm function through tail wire interface 10.
Based on the interface multiplexing circuit of the corresponding embodiment in fig. 3, in an example embodiment, fig. 5 exemplarily shows the fifth of the structure schematic diagram of the interface multiplexing circuit provided by the present invention, as shown in fig. 5, the interface multiplexing circuit is described by taking the example that the relay circuit module 30 includes the second single-pole double-throw relay K2 and the third single-pole double-throw relay K3, and the switch circuit 20 may include the second switch tube Q2, the third switch tube Q3, the second resistor R2 and the third resistor R3.
The first end b2 of the second switch tube Q2 is connected to the second controlled end ALM2 of the controlled port ALM and grounded through the second resistor R2, the second end c2 is connected to the second output control end CL2 of the output control port CL, the second output control end CL2 is connected to the switching control end A2 of the second single-pole double-throw relay K2, and the second controlled end ALM2 is used for being connected to the second alarm signal output end of the alarm signal output port. A first end b3 of the third switching tube Q3 is connected with a third controlled end ALM3 of the controlled port ALM and is grounded through a third resistor R3, a second end c3 is connected with a third output control end CL3 of the output control port CL, the third output control end CL3 is connected with a switching control end A3 of a third single-pole double-throw relay K3, and the third controlled end ALM3 is used for being connected with a third alarm signal output end of the alarm signal output port; the third terminal e2 of the second switching tube Q2 and the third terminal e3 of the third switching tube Q3 are grounded, respectively. The second single-pole double-throw relay K2 can connect the serial port receiving end with the third alarm output end out3 when the second switching tube Q2 is in an off state; the third single-pole double-throw relay K3 may communicate the serial port transmitting terminal with the fourth alarm output terminal out4 when the third switching tube Q3 is in an off state.
According to the interface multiplexing circuit shown in fig. 5, in a normal state, the second controlled terminal ALM2 and the third controlled terminal ALM3 are not controlled, the second switching tube Q2 and the third switching tube Q3 are turned off, then the contact pieces of the second single-pole double-throw relay K2 and the third single-pole double-throw relay K3 are respectively contacted with the stationary contact f2 of the respective first normally closed contact and the stationary contact f3 of the second normally closed contact, at this time, the second switching terminal RXD and the third switching terminal TXD are respectively communicated with the third alarm output terminal out3 and the fourth alarm output terminal out4 of the tail line interface 10, and the serial port debugging function can be realized only by controlling the third alarm output terminal out3 and the fourth alarm output terminal out4.
If the second controlled end ALM2 receives the alarm signal, the second controlled end ALM2 changes from the uncontrolled state to the high level, at this time, the second switching tube Q2 is turned on, the power supply end VDD supplies power to the second single-pole double-throw relay K2, the contact piece of the second single-pole double-throw relay K2 is switched from the stationary contact f2 of the first normally closed contact to the stationary contact g2 of the first normally open contact, and the alarm signal of the second controlled end ALM2 is output through the third alarm output end out3 and the fifth alarm output end out5 of the tail line interface 10. Similarly, if the alarm signal is received by the third controlled terminal ALM3, the alarm signal can be output through the fourth alarm output terminal out4 and the sixth alarm output terminal out6 of the tail line interface 10. Thus, the tail interface 10 can be utilized to realize the multiplexing of the serial port debugging function on the basis of the original two paths of alarm functions.
Based on the interface multiplexing circuit of the corresponding embodiment in fig. 5, in an example embodiment, the interface multiplexing circuit may further include a power switch circuit, and the power switch circuit may provide power required for serial port debugging through the tail interface 10, without providing a separate power supply externally.
Specifically, fig. 6 exemplarily shows six structural schematic diagrams of the interface multiplexing circuit provided by the present invention, referring to fig. 6 in combination with fig. 1, the power receiving terminal E of the power switch circuit 40 is connected to the voltage source VDD of the control circuit board, the control terminal G is connected to the sixth alarm output terminal OUT6 of the alarm output port OUT, and the power supplying terminal D is connected to the fifth alarm output terminal OUT5 of the alarm output port OUT; the sixth alarm output terminal out6 is used for connecting with the ground; the power switching circuit 40 is turned on when the sixth alarm output terminal out6 is connected to the ground so that the power supply terminal D supplies power to the outside through the fifth alarm output terminal out 5.
For example, the power switching circuit 40 may include a fourth switching tube Q4, a fourth resistor R4, a first capacitor C1 and a second capacitor C2. The first end c4 of the fourth switching tube Q4 is connected to the receiving end E, the second end b4 is connected to the control end G, and the third end E4 is connected to the power supply end D. One end of the fourth resistor R4 is connected to the first end c4 of the fourth switching tube Q4, and the other end is connected to the second end b4 of the fourth switching tube Q4; the receiving end E is grounded through a first capacitor C1, and the third end E4 of the fourth switching tube Q4 is grounded through a second capacitor C2.
The exemplary fourth switch Q4 may be a metal-oxide semiconductor field effect transistor (MOS), and accordingly, the first terminal c4, the second terminal b4 and the third terminal e4 are a source, a gate and a drain of the MOS.
Further, in the interface multiplexing circuit shown in fig. 6, the fixed contact g2 of the first normally open contact of the relay circuit module 30 may be connected to the fifth alarm output terminal out5 through a tail, and the fixed contact g3 of the second normally open contact of the relay circuit module 30 may be connected to the sixth alarm output terminal out6 through a tail.
According to the interface multiplexing circuit shown in fig. 6, when the second controlled terminal ALM2 is not controlled, the second switching tube Q2 is turned off, the power supply terminal VDD does not supply power to the second single-pole double-throw relay K2, the second single-pole double-throw relay K2 is turned off and is in a normally closed state, and at this time, the second output terminal P2 on the second single-pole double-throw relay K2 is connected with the stationary contact f2 of the first normally closed contact, so that the serial port receiving terminal connected with the second switching terminal RXD on the control circuit board is connected with the third alarm output terminal out 3; similarly, when the third controlled end ALM3 is not controlled, the third switching tube Q3 is turned off, and the third single-pole double-throw relay K3 is in a normally closed state, so that the serial port transmitting end connected with the third switching end TXD on the control circuit board is communicated with the fourth alarm output end out4. For the fourth switching tube Q4, when the second end b4 is at a low level, the fourth switching tube is turned on, and when the second end b4 is at a high level, the fourth switching tube is turned off, so that if power needs to be supplied, the sixth alarm output end out6 only needs to be connected to ground, for example, to the ground end of the tail line interface 10, and power can be supplied to the outside through the fifth alarm output end out 5.
Based on this, when using the serial port debugging function, serial port receiving terminal and serial port transmitting terminal on the control circuit board can communicate respectively to the outside tail wire interface 10 of supervisory equipment casing, realize external connection through tail wire interface 10, can realize the serial port debugging under the prerequisite of not taking apart supervisory equipment.
The utility model provides an interface multiplexing circuit, can utilize the normally closed state of relay, with the end that resets on the supervisory equipment control circuit board, target control end such as serial ports debugging end communicates to the tail wire interface, the function of tail wire has been expanded, when resetting, functions such as serial ports debugging, only need to operate corresponding terminal on the outside tail wire interface of supervisory equipment casing can, need not to tear open the machine to supervisory equipment, get the circuit board, the welding connector, loaded down with trivial details operations such as repacking, function such as reset and serial ports debugging realize simply, the maintenance cost is saved, and the damage that probably causes supervisory equipment in the dismouting supervisory equipment process has been avoided.
Fig. 7 illustrates a schematic structural diagram of the monitoring device provided by the present invention, and referring to fig. 7, the monitoring device 70 may include a housing 71, an interface multiplexing circuit 72, and a control circuit board 73 disposed in the housing 71. The interface multiplexing circuit 72 may be any one of the interface multiplexing circuits provided in the above embodiments, the interface multiplexing circuit 72 is connected to the control circuit board 73, and a tail interface of the interface multiplexing circuit 72 is disposed outside the housing 71, for example, may be embedded in an outer surface of the housing 71, or may be suspended from the outside through a tail.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. An interface multiplexing circuit is characterized by comprising a tail line interface, a switch circuit and a switching circuit;
the controlled port of the switch circuit is used for being connected with the alarm signal output port of the monitoring equipment control circuit board, and the output control port of the switch circuit is connected with the switching control port of the switching circuit;
the target switching end of the switching circuit is used for being connected with the target control end of the control circuit board, the output port of the switching circuit is connected with the alarm output port of the tail interface, and the tail interface is arranged outside the monitoring equipment;
the switch circuit is switched on or switched off according to the signal output by the alarm signal output port; and the switching circuit is used for communicating the target control end with the alarm output port when the switching circuit is in an off state.
2. The interface multiplexing circuit of claim 1 wherein the target control terminal is a reset terminal, the output port of the switching circuit comprises a first output terminal, the target switching terminal comprises a first switching terminal, the alarm output port comprises a first alarm output terminal, and the switching circuit comprises a first relay;
and a static contact of a normally closed contact of the first relay is connected with the first switching end, a movable contact is connected with a first output end of the switching circuit, the first output end is connected with the first alarm output end, and the monitoring equipment resets when the input of the first switching end is low level.
3. The interface multiplexing circuit of claim 2 wherein the switching circuit comprises a first switching tube and a first resistor;
the first end of the first switch tube is connected with the first controlled end of the controlled port, the second end of the first switch tube is connected with the first output control end of the output control port, the third end of the first switch tube is grounded, the first controlled end is used for being connected with the first alarm signal output end of the alarm signal output port, and the first output control end is connected with the switching control end of the first relay;
the first end of the first switch tube is grounded through the first resistor.
4. The interface multiplexing circuit of claim 1, wherein the target control terminal is a serial port debug terminal, and the serial port debug terminal comprises a serial port receiving terminal and a serial port transmitting terminal; the output port of the switching circuit comprises a second output end and a third output end, the target switching end comprises a second switching end and a third switching end, and the alarm output port comprises a third alarm output end and a fourth alarm output end; the second switching end is used for being connected with the serial port receiving end, and the third switching end is used for being connected with the serial port sending end;
the switching circuit is a relay circuit module, a static contact of a first normally closed contact of the relay circuit module is connected with the second switching end, a static contact of a second normally closed contact of the relay circuit module is connected with the third switching end, a first movable contact of the relay circuit module is connected with the second output end, and a second movable contact of the relay circuit module is connected with the third output end;
the second output end is connected with the third alarm output end;
and the third output end is connected with the fourth alarm output end.
5. The interface multiplexing circuit of claim 4 wherein the relay circuit module is a double pole double throw relay and the switching circuit comprises a second switching tube and a second resistor;
the first end of the second switch tube is connected with the second controlled end of the controlled port, the second end of the second switch tube is connected with the second output control end of the output control port, the second output control end is connected with the double-pole switching control end of the double-pole double-throw relay, and the second controlled end is used for being connected with the second alarm signal output end of the alarm signal output port;
the first end of the second switch tube is grounded through the second resistor;
and the third end of the second switch tube is grounded.
6. The interface multiplexing circuit of claim 4 wherein the relay circuit module comprises a second single pole double throw relay and a third single pole double throw relay, the switching circuit comprising a second switching tube, a third switching tube, a second resistor and a third resistor;
the first end of the second switch tube is connected with the second controlled end of the controlled port and is grounded through the second resistor, the second end of the second switch tube is connected with the second output control end of the output control port, the second output control end is connected with the switching control end of the second single-pole double-throw relay, and the second controlled end is used for being connected with the second alarm signal output end of the alarm signal output port;
the first end of the third switching tube is connected with a third controlled end of the controlled port and is grounded through the third resistor, the second end of the third switching tube is connected with a third output control end of the output control port, the third output control end is connected with a switching control end of the third single-pole double-throw relay, and the third controlled end is used for being connected with a third alarm signal output end of the alarm signal output port;
the third end of the second switching tube and the third end of the third switching tube are grounded respectively;
the second single-pole double-throw relay connects the serial port receiving end with the third alarm output end when the second switching tube is in an off state;
and the third single-pole double-throw relay communicates the serial port sending end with the fourth alarm output end when the third switching tube is in an off state.
7. The interface multiplexing circuit of any one of claims 4 to 6, further comprising a power switch circuit, wherein a power receiving terminal of the power switch circuit is connected to a voltage source of the control circuit board, a power supplying terminal of the power switch circuit is connected to a fifth alarm output terminal of the alarm output port, and a control terminal of the power switch circuit is connected to a sixth alarm output terminal of the alarm output port;
the sixth alarm output end is used for being connected with the ground;
and the power supply switching circuit is conducted when the sixth alarm output end is connected with the ground, so that the power supply end supplies power to the outside through the fifth alarm output end.
8. The interface multiplexing circuit of claim 7, wherein the power switch circuit comprises a fourth switch tube, a fourth resistor, a first capacitor, and a second capacitor;
the first end of the fourth switching tube is connected with the power receiving end, the second end of the fourth switching tube is connected with the control end, and the third end of the fourth switching tube is connected with the power supply end;
one end of the fourth resistor is connected with the first end of the fourth switching tube, and the other end of the fourth resistor is connected with the second end of the fourth switching tube;
the power receiving end is grounded through the first capacitor, and the third end of the fourth switching tube is grounded through the second capacitor.
9. The interface multiplexing circuit of claim 8 wherein a stationary contact of the first normally open contact of the relay circuit module is connected to the fifth alarm output and a stationary contact of the second normally open contact of the relay circuit module is connected to the sixth alarm output.
10. A monitoring device comprising a housing, an interface multiplexing circuit according to any one of claims 1 to 9, and a control circuit board disposed within the housing; the interface multiplexing circuit is connected with the control circuit board, and the tail wire interface is arranged outside the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222100483.5U CN218122482U (en) | 2022-08-10 | 2022-08-10 | Interface multiplexing circuit and monitoring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222100483.5U CN218122482U (en) | 2022-08-10 | 2022-08-10 | Interface multiplexing circuit and monitoring equipment |
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| Publication Number | Publication Date |
|---|---|
| CN218122482U true CN218122482U (en) | 2022-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222100483.5U Active CN218122482U (en) | 2022-08-10 | 2022-08-10 | Interface multiplexing circuit and monitoring equipment |
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| Country | Link |
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| CN (1) | CN218122482U (en) |
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