CN212989524U - Comprehensive security networking management and control terminal - Google Patents
Comprehensive security networking management and control terminal Download PDFInfo
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- CN212989524U CN212989524U CN202021948042.5U CN202021948042U CN212989524U CN 212989524 U CN212989524 U CN 212989524U CN 202021948042 U CN202021948042 U CN 202021948042U CN 212989524 U CN212989524 U CN 212989524U
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Abstract
The application relates to a comprehensive safety networking management and control terminal relates to the data transmission terminal, and it includes the casing and sets up the terminal host computer in the casing, still including being used for doing the monitoring module of electric power parameter monitoring, monitoring module's output electricity is connected in the terminal host computer and it includes current monitoring unit and voltage monitoring unit. The application has the effect of better matching with workers to do safety management.
Description
Technical Field
The application relates to a data transmission terminal, in particular to a comprehensive security networking management and control terminal.
Background
The internet of things refers to ubiquitous terminal equipment and facilities, including sensors with 'internal intelligence', mobile terminals, industrial systems, building control systems, household intelligent facilities, video monitoring systems and the like, and 'external enabling', such as various assets attached with RFID, intelligent objects or animals such as individuals and vehicles carrying wireless terminals or 'intelligent dust', and the like, by means of various wireless and/or wired long-distance and/or short-distance communication networks, modes such as interconnection, application large integration, SaaS operation based on cloud computing (cattle computing) and the like are realized, and under the circumstances of an intranet, a private network and/or the internet, a proper information safety guarantee mechanism is adopted to provide safe, controllable and personalized real-time online monitoring, positioning and tracing, alarm linkage, scheduling command, plan management, remote control, safety precaution and the like, The management and service functions of remote maintenance, online upgrade, statistical forms, decision support, leadership desktop and the like realize the integration of ' management, control and camp ' of ' all things ' with high efficiency, energy conservation, safety and environmental protection '.
Currently, internet of things technology is widely used in a plurality of industries, such as: the field of security technology in smart cities; in the construction process of the internet of things, data transmission and communication between devices are important links, and the inventor considers that the existing data transmission terminal used as intermediate transmission has the following defects:
in the safety management process, need synthesize the electric fire and the video monitoring etc. that acquire each shop, and current data transmission terminal is mostly just to do data transmission for the electric power parameter of the shop etc. that the supplementary judgement electric fire need install or dock other corresponding monitoring systems and just can acquire, leads to the result of use not good relatively, consequently this application provides a new technical scheme.
SUMMERY OF THE UTILITY MODEL
In order to better cooperate with workers to conduct safety management, the application provides a comprehensive safety networking management and control terminal.
The application provides a comprehensive security networking management and control terminal adopts following technical scheme:
the utility model provides a comprehensive type safety networking management and control terminal, includes the casing and sets up the terminal host computer in the casing, still includes the monitoring module that is used for doing the monitoring of electric power parameter, monitoring module's output electricity is connected in the terminal host computer and it includes current monitoring unit and voltage monitoring unit.
Through adopting above-mentioned technical scheme, this application is when doing data transmission, still can directly be through the electric current monitoring unit and the voltage monitoring unit of taking certainly to electric power parameter monitoring is done to appointed store etc. to safety control is done to better cooperation staff.
Preferably, the current monitoring unit comprises four current transformers CT1 respectively arranged on three live wires and one zero wire of the three-phase power;
the output ends of the four current transformers CT1 are respectively called a CT1_ A end, a CT1_ B end, a CT1_ C end and a CT1_ N end;
the CT1_ A end, the CT1_ B end and the CT1_ C end are electrically connected with current sampling circuits respectively, and a plurality of current sampling circuits are simultaneously and electrically connected with the CT1_ N end.
Through adopting above-mentioned technical scheme, this application adopts current transformer CT1 to do the detection to the current on three live wires and the zero line of the three-phase electricity of shop etc to export for current sampling circuit, so that feed back to the terminal host computer and do monitoring work.
Preferably, the current sampling circuit comprises a third voltage follower U3, and the terminal CT1_ a, the terminal CT1_ B or the terminal CT1_ C are electrically connected to the input terminal of the third voltage follower U3;
the CT1_ N terminal is also electrically connected to the input terminal of the third voltage follower U3;
the output end of the third voltage follower U3 is connected in series with a fifth resistor R5, the other end of the fifth resistor R5 is electrically connected with a third capacitor C3, and a lead is pulled out from the connection point of the fifth resistor R5 and the third capacitor C3 to serve as an output end AD I.
By adopting the technical scheme, the voltage follower circuit is a derivative product of the in-phase amplifying circuit and is the in-phase amplifying circuit with the amplification factor of 1; the ideal in-phase amplifying circuit has infinite input impedance and infinite output impedance, when the input impedance is very high, the circuit is equivalent to an open circuit for a preceding circuit, when the output impedance is very low, the circuit is equivalent to a constant voltage source for a subsequent circuit, namely, the output voltage is not influenced by the impedance of the subsequent circuit, and the circuit is equivalent to an open circuit for the preceding circuit and the output voltage is not influenced by the impedance of the subsequent circuit, even if the circuits are not influenced by each other, the sampling effect of the application is relatively better; the fifth resistor R5 and the third capacitor C3 form a filter circuit, and the filter circuit can filter noise waves of the signal output by the third voltage follower U1, so that the sampling effect is improved.
Preferably, an RC parallel circuit is connected in series to an input end of the third voltage follower U3;
the terminal CT1_ A, the terminal CT1_ B or the terminal CT1_ C are electrically connected to a connection point of the RC parallel circuit and the third voltage follower U3, and the terminal CT1_ N is electrically connected to the other end of the RC parallel circuit.
By adopting the technical scheme, the RC parallel circuit can be used for filtering the output of the current transformer CT 1.
Preferably, the RC parallel circuit is further connected in parallel with a transient diode D.
By adopting the technical scheme, the circuit has relatively higher safety, because the transient diode D is a high-efficiency protective device in a diode form; when two poles of the circuit are impacted by reverse transient high energy, the circuit can change the high impedance between the two poles into low impedance at the speed of 10 to the order of minus 12 seconds, absorb the surge power of thousands of watts and clamp the voltage between the two poles at a preset value, thereby effectively protecting precise components in the circuit from being damaged by various surge pulses.
Preferably, positive power terminals of the two third voltage followers U3 are electrically connected with a fourth capacitor C4, and a connection point of the third voltage follower U3 and the fourth capacitor C4 is connected with a power supply; and the other end of the RC parallel circuit of the third voltage follower U3 connected with the fourth capacitor C4 is electrically connected with a reference voltage circuit.
By adopting the technical scheme, the reference voltage circuit can be used for providing the reference voltage, so that the sampling stability is improved; the fourth capacitor C2 can be used as a decoupling capacitor, and the influence of unstable phenomena of the power supply on the circuit can be reduced; because the structures of the three current sampling circuits are distinguished, the reference voltage circuit and one way of the fourth capacitor C4 are provided at the same time, and the monitoring effect is relatively optimal; the monitoring effect of the circuit connected with the fourth capacitor C2 is second; the reference voltage circuit and the fourth capacitor C4 have no monitoring effect; the three monitoring effects can be compared with each other, and the assistant working personnel can judge the influence of circuit interference.
Preferably, the voltage monitoring unit includes a transforming circuit and a voltage sampling circuit, the transforming circuit includes three groups of single-phase transforming circuits respectively connected to three live wires, the single-phase transforming circuit includes a voltage transformer T, two ends of a primary side of the voltage transformer T are respectively connected in series with a first resistor R1, and the other ends of the two first resistors R1 are respectively connected to one live wire and a zero line of the three-phase power; and the input end of the voltage sampling circuit is connected to two ends of the secondary side of the voltage transformer T.
By adopting the technical scheme, the three-phase power of a specified store can be directly connected through the single-phase voltage transformation circuit, and each live wire of the three-phase power is subjected to voltage monitoring through the sampling circuit; meanwhile, due to the existence of the first resistor R1, voltage division and current limitation can be performed, and the probability of damage of the voltage transformer is reduced.
Preferably, the voltage sampling circuit comprises a first voltage follower U1, two secondary sides of the voltage transformer T are respectively connected to an input end of a first voltage follower U1, an output end of the first voltage follower U1 is connected in series with a second resistor R2, the other end of the second resistor R2 is electrically connected with a first capacitor C1, and the other end of the first capacitor C1 is grounded; and a lead is pulled out from the connection point of the second resistor R2 and the first capacitor C1 to serve as a voltage detection output terminal AD V.
Through adopting above-mentioned technical scheme, when doing the voltage monitoring, the isolation effect of the same usable voltage follower of this application makes each other do not influence between preceding, the back stage circuit to the sampling effect of this application is better relatively.
Preferably, the input end of the first voltage follower U1 is connected in series with an RC parallel circuit, and two ends of the secondary side of the voltage transformer T are respectively electrically connected to two ends of the RC parallel circuit; and the negative output of the secondary side of the voltage transformer T and the connection point of the RC parallel circuit are electrically connected with a reference voltage circuit.
By adopting the technical scheme, the RC parallel circuit can be utilized to filter the output signal of the voltage transformer T; meanwhile, when the current monitoring of the three-phase power is carried out, the output of the reference voltage circuit can be used as a reference, and the stability of the current sampling circuit is improved.
Preferably, the reference voltage circuit comprises a second voltage follower U2, the input end of the second voltage follower U2 is electrically connected with a third resistor R3, and the other end of the third resistor R3 is electrically connected with a power supply; the connection point of the third resistor R3 and the second voltage follower U2 is electrically connected with a fourth resistor R4, and the other end of the fourth resistor R4 is grounded.
By adopting the technical scheme, the isolation effect of the voltage follower can be utilized, so that the use of the reference circuit is not interfered by the equivalent internal resistance change of the next-stage circuit.
In summary, the present application includes at least one of the following beneficial technical effects: the terminal host computer electricity is connected with can be directly to the three-phase electricity of stores etc. do voltage monitoring's voltage monitoring unit, and still the electricity is connected with can be directly to the three-phase electricity of stores etc. do current monitoring's current monitoring unit to the cooperation staff that this application can be better does safety control.
Drawings
FIG. 1 is a schematic diagram of the overall structure of one embodiment of the present application;
FIG. 2 is a schematic circuit diagram of a current monitoring unit according to an embodiment of the present application;
FIG. 3 is a circuit schematic of a voltage transformation circuit according to an embodiment of the present application;
FIG. 4 is a circuit schematic of a voltage sampling circuit according to an embodiment of the present application.
Description of reference numerals: 1. a housing; 2. a current monitoring unit; 21. a current monitoring unit; 3. a voltage transformation circuit; 4. a voltage transformation circuit; 5. and a current monitoring unit.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a comprehensive security networking management and control terminal. Referring to fig. 1, integrated type safety networking management and control terminal includes casing 1 and sets up the terminal host computer in casing 1, and casing 1 is hollow cuboid structure, and the terminal host computer is the integrated circuit structure, and its integrated board passes through the bolt fastening in casing 1.
The terminal host at least comprises a control unit, a wireless communication unit (such as a GPRS module) connected with the control unit, an upper communication interface, a lower communication interface (such as RS-485) and a power interface; the terminal host is a main body for realizing the communication transmission function of the conventional data transmission terminal, and specifically, takes the control unit as an example: the control unit includes at least a microcontroller (e.g., STM32F072 VB) and a memory.
In order to better cooperate with safety management work, the system also comprises a monitoring module for monitoring the electric power parameters, wherein the output end of the monitoring module is electrically connected with the terminal host; the monitoring module comprises a current monitoring unit 2 and a voltage monitoring unit.
Referring to fig. 2, the current monitoring unit 2 includes four current transformers CT1, the four current transformers CT1 respectively correspond to three live wires and one zero wire, and lead wires are drawn out from an output side of the current transformer CT1 as output ends, which are respectively called a CT1_ a end, a CT1_ B end, a CT1_ C end and a CT1_ N end;
the CT1_ A end, the CT1_ B end and the CT1_ C end are respectively electrically connected with a current sampling circuit 21; the three current sampling circuits 21 are simultaneously electrically connected to the CT1 — N terminal.
According to the arrangement, the current transformer CT1 senses the current of each circuit of three-phase power and supplies the current to the current sampling circuit 21 at the lower stage.
Referring to fig. 2, the current sampling circuit 21 includes a third voltage follower U3.
The CT1_ A end, the CT1_ B end or the CT1_ C end are electrically connected to the input end of the third voltage follower U3; the CT1_ N terminal is also electrically connected to the input terminal of the third voltage follower U3; alternatively, the CT1_ A terminal, the CT1_ B terminal and the CT1_ C terminal are respectively connected to the CT1_ N terminal; the input terminals of the three third voltage followers U3 are electrically connected to the three connection points generated above, respectively.
The output end of the third voltage follower U3 is connected in series with a fifth resistor R5, the other end of the fifth resistor R5 is electrically connected with a third capacitor C3, and a lead is drawn out from the connection point of the fifth resistor R5 and the third capacitor C3 to serve as an output end AD I.
The third voltage follower U3 is provided because the voltage follower circuit is a derivative of the in-phase amplifier circuit and is an in-phase amplifier circuit with an amplification factor of 1; the input impedance of an ideal in-phase amplifying circuit is infinite, and the output impedance is infinitesimal; when the input impedance is very high, the circuit is equivalent to an open circuit for a front-stage circuit, and when the output impedance is very low, the circuit is equivalent to a constant voltage source for a rear-stage circuit, namely the output voltage is not influenced by the impedance of the rear-stage circuit; a circuit which is equivalent to an open circuit to the preceding stage circuit and the output voltage is not influenced by the impedance of the following stage certainly has an isolation function, even if the preceding stage circuit and the following stage circuit are not influenced by each other, so that the current sampling circuit 21 can improve the current monitoring effect of the present application.
The fifth resistor R3 and the third resistor C3 form a filter circuit, which can filter the output of the third voltage follower U3 and improve the quality of the output signal.
Referring to fig. 2, the input terminal of the third voltage follower U3 is connected in series with an RC parallel circuit, and the RC parallel circuit is connected in series with a loop of the CT1_ a terminal, the CT1_ B terminal or the CT1_ C terminal and the CT1_ N terminal, which can filter the output signal of the current transformer CT 1.
Further, the RC parallel circuit is connected with a transient diode D in parallel.
Because the transient diode D is a high performance protection device in the form of a diode; when two poles of the current monitoring unit are impacted by reverse transient high energy, the current monitoring unit can change the high impedance between the two poles into low impedance at the speed of 10 to the order of minus 12 seconds, absorb surge power of thousands of watts and clamp the voltage between the two poles at a preset value, thereby effectively protecting precise components in a loop from being damaged by various surge pulses, and therefore, the current monitoring unit has relatively higher safety and is more difficult to damage.
The positive power end of the third voltage follower U3 connected with the terminal CT1_ A and the terminal CT1_ B is electrically connected with a fourth capacitor C4, and the connection point of the third voltage follower U3 and the fourth capacitor C4 is connected with a power supply.
And the other end of the RC parallel circuit of the third voltage follower U3 connected with the end CT1_ A is also electrically connected with a reference voltage circuit 5.
The reference voltage circuit can provide reference voltage, and the sampling stability of the circuit is improved; the fourth capacitor C2 can be used as a decoupling capacitor, and the influence of the unstable phenomenon of the power supply on the circuit can be weakened, so that one way of the reference voltage circuit and the fourth capacitor C4 is provided at the same time, and the monitoring effect is relatively optimal; the monitoring effect of the circuit connected with the fourth capacitor C2 is second; the reference voltage circuit and the fourth capacitor C4 have no monitoring effect; the monitoring effect of three live wires can be compared with each other this moment, and supplementary staff judges the influence of circuit interference.
Referring to fig. 3 and 4, further, the present application can also be directly used for voltage monitoring of three-phase power in stores and the like, and the voltage monitoring unit includes a voltage transformation circuit 3 and a voltage sampling circuit 4.
The transformation circuit 3 comprises three groups of single-phase transformation circuits which are respectively connected to three live wires, each single-phase transformation circuit comprises a voltage transformer T, two ends of a primary side of each voltage transformer T are respectively connected with a first resistor R1 in series, the other end of one first resistor R1 is electrically connected to one live wire, and the other end of the other first resistor R1 is electrically connected to a zero wire. The input end of the voltage sampling circuit 4 is connected to two ends of the secondary side of the voltage transformer T.
When the voltage sampling device is used, the voltage monitoring unit reduces the voltage on a live wire through the voltage transformer T so as to facilitate subsequent voltage sampling.
Referring to fig. 3, a fuse F is connected in series between the first resistor R1 and the live wire of the three-phase power, and the fuse F can protect the lower circuit and prevent the lower circuit structure from being damaged by excessive current.
Furthermore, a voltage dependent resistor V is also arranged, and the voltage dependent resistor V is simultaneously connected with the first resistor R1 and the primary side of the electric transformer T in parallel. The voltage dependent resistor V can respond to transient voltage, absorb overlarge transient energy and further protect a lower-level circuit structure.
Referring to fig. 4, the voltage sampling circuit includes a first voltage follower U1, an RC parallel circuit is connected in series to an input terminal of the first voltage follower U1;
two ends of the secondary side of the voltage transformer T are OUT _ L (positive) and OUT _ N (negative) respectively; the OUT _ L is electrically connected with the connection point of the RC parallel circuit and the first voltage follower U1, and the OUT _ N is electrically connected with the other end of the RC parallel circuit;
the output end of the first voltage follower U1 is connected in series with a second resistor R2, the other end of the second resistor R2 is electrically connected with a first capacitor C1, and the other end of the first capacitor C1 is grounded; and a lead is pulled out from the connection point of the second resistor R2 and the first capacitor C1 to serve as a voltage detection output end AD V, and the voltage detection output end AD V is electrically connected to a control unit of the terminal host machine and used for feedback.
The first voltage follower U1 is provided to avoid the influence between the front and rear stage circuits and improve the sampling effect.
The second resistor R2 and the first capacitor C1 form a filter circuit, and the filter circuit can filter noise waves of the signal output by the first voltage follower U1, so that the sampling effect is improved; and the RC parallel circuit is used for filtering the output of the voltage transformer T.
Referring to fig. 4, the negative output of the secondary side of the voltage transformer T, i.e. the connection point of (OUT _ N) and the RC parallel circuit, is further electrically connected with a reference voltage circuit 5 for reference, so as to improve the stability of sampling.
The reference voltage circuit 5 comprises a second voltage follower U2, the input end of the second voltage follower U2 is electrically connected with a third resistor R3, and the other end of the third resistor R3 is electrically connected with a power supply; the connection point of the third resistor R3 and the second voltage follower U2 is electrically connected with a fourth resistor R4, and the other end of the fourth resistor R4 is grounded.
Therefore, the voltage follower is selected to form the reference voltage circuit 5, and the use of the reference circuit is not interfered by the equivalent internal resistance change of the next stage circuit by utilizing the isolation effect of the voltage follower.
Referring to fig. 4, a positive power terminal of the second voltage follower U2 is electrically connected with a second capacitor C2, and a connection point of the second capacitor C2 and the second voltage follower U2 is used for connecting a power supply. The second capacitor C2 may act as a decoupling capacitor to reduce the effect of power supply instability on the circuit.
To sum up, this application accessible voltage monitoring unit is direct to be voltage monitoring to the three-phase electricity in stores etc. and is direct to be current monitoring to the three-phase electricity in stores etc. through current monitoring unit to its cooperation staff that can be better is safety control.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a comprehensive security networking management and control terminal, includes casing (1) and sets up the terminal host computer in casing (1), its characterized in that: the power parameter monitoring system further comprises a monitoring module used for monitoring power parameters, wherein the output end of the monitoring module is electrically connected to the terminal host and comprises a current monitoring unit (2) and a voltage monitoring unit.
2. The integrated security networking management and control terminal of claim 1, wherein: the current monitoring unit (2) comprises four current transformers CT1 which are respectively arranged on three live wires and one zero wire of three-phase power;
the output ends of the four current transformers CT1 are respectively called a CT1_ A end, a CT1_ B end, a CT1_ C end and a CT1_ N end;
the CT1_ A end, the CT1_ B end and the CT1_ C end are respectively electrically connected with a current sampling circuit (21), and a plurality of current sampling circuits (21) are simultaneously and electrically connected with the CT1_ N end.
3. The integrated security networking management and control terminal of claim 2, wherein: the current sampling circuit (21) comprises a third voltage follower U3, and the CT1_ A end, the CT1_ B end or the CT1_ C end is electrically connected to the input end of the third voltage follower U3;
the CT1_ N terminal is also electrically connected to the input terminal of the third voltage follower U3;
the output end of the third voltage follower U3 is connected in series with a fifth resistor R5, the other end of the fifth resistor R5 is electrically connected with a third capacitor C3, and a lead is pulled out from the connection point of the fifth resistor R5 and the third capacitor C3 to serve as an output end AD I.
4. The integrated security networking management and control terminal of claim 3, wherein: the input end of the third voltage follower U3 is connected in series with an RC parallel circuit;
the terminal CT1_ A, the terminal CT1_ B or the terminal CT1_ C are electrically connected to a connection point of the RC parallel circuit and the third voltage follower U3, and the terminal CT1_ N is electrically connected to the other end of the RC parallel circuit.
5. The integrated security networking management and control terminal of claim 4, wherein: the RC parallel circuit is also connected with a transient diode D in parallel.
6. The integrated security networking management and control terminal of claim 3, wherein: the positive power ends of the two third voltage followers U3 are electrically connected with a fourth capacitor C4, and the connection point of the third voltage follower U3 and the fourth capacitor C4 is connected with a power supply; and the other end of the RC parallel circuit of the third voltage follower U3 connected with the fourth capacitor C4 is electrically connected with a reference voltage circuit (5).
7. The integrated security networking management and control terminal of claim 6, wherein: the voltage monitoring unit comprises a transformation circuit (3) and a voltage sampling circuit (4), the transformation circuit (3) comprises three groups of single-phase transformation circuits (3) which are respectively connected with three live wires, the single-phase transformation circuit (3) comprises a voltage transformer T, two ends of a primary side of the voltage transformer T are respectively connected in series with a first resistor R1, and the other ends of the two first resistors R1 are respectively connected with one live wire and a zero line of three-phase power; and the input end of the voltage sampling circuit (4) is connected to two ends of the secondary side of the voltage transformer T.
8. The integrated security networking management and control terminal of claim 7, wherein: the voltage sampling circuit (4) comprises a first voltage follower U1, two secondary sides of the voltage transformer T are respectively connected to the input end of the first voltage follower U1, the output end of the first voltage follower U1 is connected in series with a second resistor R2, the other end of the second resistor R2 is electrically connected with a first capacitor C1, and the other end of the first capacitor C1 is grounded; and a lead is pulled out from the connection point of the second resistor R2 and the first capacitor C1 to serve as a voltage detection output terminal AD V.
9. The integrated security networking management and control terminal of claim 8, wherein: the input end of the first voltage follower U1 is connected in series with an RC parallel circuit (31), and two secondary sides of the voltage transformer T are respectively and electrically connected to two ends of the RC parallel circuit (31); and a connection point of a negative output of the secondary side of the voltage transformer T and the RC parallel circuit is electrically connected with a reference voltage circuit (5).
10. The integrated security networking management and control terminal of claim 9, wherein: the reference voltage circuit comprises a second voltage follower U2, the input end of the second voltage follower U2 is electrically connected with a third resistor R3, and the other end of the third resistor R3 is electrically connected with a power supply; the connection point of the third resistor R3 and the second voltage follower U2 is electrically connected with a fourth resistor R4, and the other end of the fourth resistor R4 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021948042.5U CN212989524U (en) | 2020-09-08 | 2020-09-08 | Comprehensive security networking management and control terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021948042.5U CN212989524U (en) | 2020-09-08 | 2020-09-08 | Comprehensive security networking management and control terminal |
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| CN212989524U true CN212989524U (en) | 2021-04-16 |
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| CN202021948042.5U Active CN212989524U (en) | 2020-09-08 | 2020-09-08 | Comprehensive security networking management and control terminal |
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