Electric switch contact temperature centralized monitor

Abstract

The utility model relates to the technical field of switch contact temperature monitoring, in particular to an electric switch contact temperature centralized monitor, which comprises a central processing unit (CPU), a display unit and an acquisition unit, the CPU comprises a chip U2, a pin 14 of the chip U2 is grounded through a capacitor C4, the pin of the chip U2 is coupled with a resistor R144 through a pin 13, the resistor R144 is grounded after being connected with a diode D7 in parallel, and the chip U2 is connected with the display unit. The chip U2 is coupled with a capacitor C29 through a pin 44, the capacitor C29 is connected with a resistor R5 in parallel and then is grounded, the resistor R5 is coupled with a resistor R144 through a resistor R145 and a capacitor C3, the resistor R145 is coupled with a diode D7 through a capacitor C1, and pins 30, 31 and 32 of the chip U2 are jointly coupled with a channel selection key N2; the temperature of the switch contact of each household is monitored, an alarm prompt is given out when the temperature exceeds the set temperature, an operator on duty needs to stop power supply immediately, power supply can be recovered after reasons are found out and eliminated, and power utilization safety is ensured. The concentration unit can monitor the temperature of 15 paths of safety points at the same time.

Description

Technical Field

[0001] This utility model relates to the field of switch contact monitoring technology, and in particular to a centralized monitor for the temperature of electrical switch contacts. Background Technology

[0002] In large shopping malls, each merchant's electricity is supplied by an independent meter installed in the main power distribution room. However, the electricity usage of each household is more complex, and some users may overload their devices, which can easily lead to fires.

[0003] Therefore, we designed a centralized monitoring device for the temperature of electrical switch contacts. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a centralized monitoring device for the temperature of electrical switch contacts, which solves the technical problem in existing technologies that "in large shopping malls, merchants' electricity is supplied by independent meters installed in the main power distribution room, and the electricity usage of each household is relatively complex, with some users potentially overloading their devices, which could easily lead to fires."

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A centralized monitoring device for the temperature of electrical switch contacts includes a CPU unit, a display unit, and a data acquisition unit.

[0007] The CPU unit includes a chip U2. Pin 14 of chip U2 is grounded through capacitor C4. Pin 13 of chip U2 is coupled to resistor R144. Resistor R144 is connected in parallel with diode D7 and then grounded. Pin 44 of chip U2 is coupled to capacitor C29. Capacitor C29 is connected in parallel with resistor R5 and then grounded. Resistor R5 is coupled to resistor R144 through resistor R145, capacitor C3, and resistor R144. Resistor R145 is coupled to diode D7 through capacitor C1. Pins 30, 31, and 32 of chip U2 are jointly coupled to channel selection key N2. Pins 30, 31, and 32 of chip U2 are coupled to a switch through diodes D3, D4, and D5 respectively and then grounded through capacitor C1. Pin 35 of chip U2 is grounded through resistors R3 and R2 and capacitor C1.

[0008] The acquisition unit includes chips U1 and U4. Pins 2, 6, 7, 8, and 10 of chip U1 are connected to transistors Y6 and Y16 via photodiodes and then grounded via resistors R1 and R13. Pins 2, 5, 6, 7, 8, 10, 11, and 12 of chip U1 are connected to ports P10, P11, P12, P13, P14, P15, P16, and P17 via resistor R16. Pin 5 of chip U1 is grounded via transistor Y1 and resistor R10, and pin 12 of chip U1 is grounded via transistor Y3 and resistor R6.

[0009] As a preferred technical solution of this utility model, the acquisition unit includes a chip U3. Pin 1 of the chip U3 is connected to a transformer via a bridge rectifier circuit composed of diodes. Pins 1 and 3 of the chip U3 are grounded via capacitors. Pins of the chip U3 are coupled to a capacitor C8 via an inductor L1 and a resistor R8. A capacitor C13, an inductor L2, and a capacitor C9 are connected in parallel and then connected in parallel with an inductor L1 and then connected in series with a point capacitor C15.

[0010] As a preferred embodiment of this utility model, pin 1 of chip U4 is grounded via transistor Y2 and resistor R14, and pin 4 of chip U4 is grounded via transistor Y4 and resistor R1.

[0011] As a preferred embodiment of this utility model, pin 5 of chip U4 is grounded via transistor Y3 and resistor R1, and pin 12 of chip U4 is grounded via transistor Y5 and resistor R12.

[0012] As a preferred technical solution of this utility model, pins 2, 3, 6, 7, 8, 9, 10, and 11 of the chip U4 are connected to ports P10, P11, P12, P13, P14, P15, P16, and P17 respectively via resistor R16.

[0013] As a preferred embodiment of this utility model, pins 3, 9, and 11 of the chip U4 are coupled to transistors Y6 and Y16 respectively via photodiodes and then grounded via resistors R1 and R13.

[0014] This utility model provides a centralized monitoring device for the temperature of electrical switch contacts, which has the following advantages:

[0015] This application monitors the temperature of the switch contacts in each household. If the temperature exceeds a set limit, an alarm is triggered, and on-duty personnel should immediately stop power supply. Power can be restored after the cause has been identified and eliminated, ensuring electrical safety. This centralized unit can simultaneously monitor the temperature of 15 safety points. Attached Figure Description

[0016] Figure 1 This is a circuit diagram of the CPU unit in this utility model;

[0017] Figure 2 This is a circuit diagram of the display unit in this utility model;

[0018] Figure 3 This is the circuit diagram of the data acquisition unit in this utility model;

[0019] Figure 4 This is a diagram showing the panel operation and display layout of this utility model. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0022] The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments:

[0023] refer to Figure 1-4 A centralized monitoring device for the temperature of electrical switch contacts includes a CPU unit, a display unit, and a data acquisition unit.

[0024] The CPU unit includes a chip U2. Pin 14 of chip U2 is grounded through capacitor C4. Pin 13 of chip U2 is coupled to resistor R144. Resistor R144 is connected in parallel with diode D7 and then grounded. Pin 44 of chip U2 is coupled to capacitor C29. Capacitor C29 is connected in parallel with resistor R5 and then grounded. Resistor R5 is coupled to resistor R144 through resistor R145, capacitor C3, and resistor R144. Resistor R145 is coupled to diode D7 through capacitor C1. Pins 30, 31, and 32 of chip U2 are jointly coupled to channel selection key N2. Pins 30, 31, and 32 of chip U2 are coupled to a switch through diodes D3, D4, and D5 respectively and then grounded through capacitor C1. Pin 35 of chip U2 is grounded through resistors R3 and R2 and capacitor C1.

[0025] The acquisition unit includes chips U1 and U4. Pins 2, 6, 7, 8, and 10 of chip U1 are coupled to transistors Y6 and Y16 via photodiodes and then grounded via resistors R1 and R13. Pins 2, 5, 6, 7, 8, 10, 11, and 12 of chip U1 are connected to ports P10, P11, P12, P13, P14, P15, P16, and P17 via resistor R16. Pin 5 of chip U1 is grounded via transistor Y1 and resistor R10. Pin 12 of chip U1 is grounded via transistor Y3 and resistor R6. Pin 1 of chip U4 is grounded via transistor... Y2 and resistor R14 are grounded. Pin 4 of chip U4 is grounded via transistor Y4 and resistor R1. Pin 5 of chip U4 is grounded via transistor Y3 and resistor R1. Pin 12 of chip U4 is grounded via transistor Y5 and resistor R12. Pins 2, 3, 6, 7, 8, 9, 10, and 11 of chip U4 are connected to ports P10, P11, P12, P13, P14, P15, P16, and P17 respectively via resistor R16. Pins 3, 9, and 11 of chip U4 are coupled to transistors Y6 and Y16 via photodiodes and then grounded via resistors R1 and R13.

[0026] The acquisition unit includes a chip U3. Pin 1 of the chip U3 is connected to a transformer via a bridge rectifier circuit composed of diodes. Pins 1 and 3 of the chip U3 are grounded via capacitors. Pins of the chip U3 are coupled to a capacitor C8 via an inductor L1 and a resistor R8. A capacitor C8 is coupled to a capacitor C13, an inductor L2, and a capacitor C9 in parallel, which is then connected in parallel with an inductor L1 and in series with a point capacitor C15.

[0027] Specifically,

[0028] 1. Connect the 15 PT100 temperature sensors to terminals T0-T14 respectively;

[0029] 2. Alarm indicator lights H0-H14 corresponding to channel 15;

[0030] 3. Equipped with temperature alarm terminal outputs TA TB TC;

[0031] 4. A temperature alarm sound will be emitted by the buzzer, which can be silenced by the stop button;

[0032] 5. Alarm channel temperature query N3 can be viewed by pressing the up or down buttons;

[0033] 6. Display the actual value of the corresponding alarm temperature, N4;

[0034] 7. Alarm status upload terminal +RS485- to the security monitoring platform.

[0035] Working principle:

[0036] First, alarm temperature setting: Channels are selected using the increase and decrease keys. N3 displays the current channel, and N4 displays the current channel temperature. Press the modify key, and N4 will flash to display the set value. Modify the value using the increase and decrease keys, and then press the confirm key to return. The alarm temperature value for each channel can be modified according to actual needs. Channels that are put into use must be modified.

[0037] Secondly, starting with the Run button will illuminate the Run indicator light HR15;

[0038] Next, the stop button disables the enable function, and indicator light HR15 turns off;

[0039] During operation, the actual temperature of each channel is displayed in turn. N3 displays the channel number, and N4 displays the actual temperature of the corresponding channel.

[0040] When an alarm occurs, the alarm indicator light flashes for the corresponding channel, the buzzer sounds an alarm, and terminals TA, TB, and TC output alarm signals. N3 stops normal rotation display and immediately switches to rotation display of the alarm channel. N4 displays the corresponding actual alarm value.

[0041] The remote transmission terminal RS485 immediately sends the alarm status to the host computer, uploading the corresponding alarm channel and temperature value, and awaits processing;

[0042] This application monitors the temperature of the switch contacts in each household. If the temperature exceeds a set limit, an alarm is triggered, and on-duty personnel should immediately stop power supply. Power can be restored after the cause has been identified and eliminated, ensuring electrical safety. This centralized unit can simultaneously monitor the temperature of 15 safety points.

[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A kind of electric switch contact temperature concentration monitor, including CPU unit, display unit, acquisition unit, CPU unit includes chip U2, the pin 14 of the chip U2 is grounded by capacitor C4, the pin of the chip U2 is coupled with resistance R144 by pin 13, resistance R144 is grounded after being connected with diode D7, the chip U2 is coupled with capacitor C29 via pin 44, capacitor C29 is grounded after being connected with resistance R5, resistance R5 is coupled with resistance R144 via resistance R145, capacitor C3 and resistance R144, resistance R145 is coupled with diode D7 via capacitor C1, the pin 30,31,32 of the chip U2 is coupled with channel selection key N2, the pin 30,31,32 of the chip U2 is coupled with switch via diode D3,D4,D5 respectively and then grounded via capacitor C1, the pin 35 of the chip U2 is grounded via resistance R3,R2,capacitor C1; Acquisition unit includes chip U1,U4, the pin 2,6,7,8,10 of the chip U1 is coupled with triode Y6,Y16 via photosensitive diode and then grounded via resistance R1,R13, the pin 2,5,6,7,8,10,11,12 of the chip U1 is connected with port P10,P11,P12,P13,P14,P15,P16,P17 via resistance R16, the pin 5 of the chip U1 is grounded via triode Y1, resistance R10, the pin 12 of the chip U1 is grounded via triode Y3, resistance R6.

2. A temperature concentrator monitor for electrical switch contacts as defined in claim 1, wherein, Acquisition unit includes chip U3, the pin 1 of the chip U3 is connected with transformer via bridge rectifier circuit composed of diode, the pin 1,3 of the chip U3 is grounded via capacitor respectively, the pin of the chip U3 is coupled with capacitor C8 via inductance L1, resistance R8, capacitor C13, inductance L2, capacitor C9 are connected and then connected with inductance L1 and then connected with point capacitor C15 in series.

3. A temperature concentrator monitor for electrical switch contacts as defined in claim 1, wherein, The pin 1 of the chip U4 is grounded via triode Y2 and resistance R14, the pin 4 of the chip U4 is grounded via triode Y4 and resistance R1.

4. A temperature concentrator monitor for electrical switch contacts as defined in claim 1, wherein, The pin 5 of the chip U4 is grounded via triode Y3 and resistance R1, the pin 12 of the chip U4 is grounded via triode Y5 and resistance R12.

5. A temperature concentrator monitor for electrical switch contacts as defined in claim 1, wherein, The pin 2,3,6,7,8,9,10,11 of the chip U4 is connected with port P10,P11,P12,P13,P14,P15,P16,P17 via resistance R16 respectively.

6. A temperature concentrator monitor for electrical switch contacts as defined in claim 1, wherein, The pin 3,9,11 of the chip U4 is coupled with triode Y6,Y16 via photosensitive diode respectively and then grounded via resistance R1,R13.

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