Switch state indicator

Abstract

The utility model relates to the field of environment temperature control, in particular to a switch state indicator. Comprising a temperature acquisition part, a humidity acquisition part, a data processing part and an output control part, the temperature acquisition part is a temperature collector P1, the humidity acquisition part is a humidity collector P2, the data processing part is a voltage comparator U1: 1 and a voltage comparator U1: 2, and the output control part is a triode Q1 and a relay J1. The pure hardware temperature and humidity control circuit designed by the utility model is simple in circuit, low in cost and easy to realize; the hysteresis voltage comparator has upper and lower limit threshold levels, so that faults such as output jitter and frequent overturning caused by input signal fluctuation can be effectively eliminated, and the anti-interference capability is relatively high.

Description

Technical Field

[0001] The utility model relates to the field of environmental temperature control, and in particular to a switch state indicator. Background Art

[0002] Switch status indicators are widely used in electrical systems and are devices for monitoring the status of electrical equipment. They are widely used in distribution rooms, switchgear stations, and power distribution stations. They monitor the switch status of electrical equipment in real time, enabling timely detection of equipment failures and the implementation of appropriate measures. They also monitor the indoor environment of distribution rooms in real time, maintaining normal temperature and humidity levels, and ensuring a stable and efficient operating environment for electrical equipment.

[0003] When electrical equipment is exposed to excessively high humidity for extended periods, moisture in the air adheres to the surface of the insulation material, reducing the insulation resistance. This significantly increases the likelihood of leakage, potentially leading to insulation breakdown and accidents. Internal losses in electrical equipment generate a certain temperature. If the operating temperature is too high, heat cannot dissipate quickly, causing the equipment to overheat and trip, or even burn out. If the operating temperature is too low, electrical equipment efficiency is affected, preventing potential problems from being addressed promptly.

[0004] However, with the advancement of electrical technology, electrical monitoring equipment has become increasingly integrated, diversified, and functionally sophisticated, but also increasingly expensive. Currently, switch status indicators are mostly controlled by single-chip microcomputers, which control the hardware through software logic processing to achieve ambient temperature regulation, resulting in high costs. Furthermore, the high level of interference in power plants can easily interfere with temperature and humidity data collection, affecting software processing results. Therefore, a technical solution has been proposed to address this issue. Utility Model Content

[0005] The utility model aims to solve the problems of high cost and easy interference in temperature and humidity collection and processing of switch status indicators in the prior art, and proposes a switch status indicator.

[0006] To achieve the above-mentioned purpose, the utility model provides a switch status indicator, which includes a temperature acquisition part, a humidity acquisition part, a data processing part and an output control part. The temperature acquisition part is a temperature collector P1, the humidity acquisition part is a humidity collector P2, the data processing part is a voltage comparator U1:1 and a voltage comparator U1:2, and the output control part is a transistor Q1 and a relay J1.

[0007] The temperature control signal passes through the cathode end of diode D1, the key control signal passes through the cathode end of diode D2, and the humidity control signal passes through the cathode end of diode D3, and can respectively control transistor Q1 through current limiting resistor R17 to drive the opening and closing of the output contact of relay J1.

[0008] The pin of the temperature collector P1 is connected to one end of the resistor R1 and one end of the resistor R2, and the pin of the temperature collector P1 is connected to the power ground; the other end of the resistor R1 is connected to the power supply VCC; the other end of the resistor R2 is connected to one end of the capacitor C1 and one end of the resistor R3; the other end of the resistor C1 is connected to the power ground; the other end of the resistor R3 is connected to one end of the capacitor C2 and one end of the resistor R4 and pin 1 of the comparator U1:1; the other end of the capacitor C2 is connected to pin 2 of the comparator U1:1; the other end of the resistor R4 is connected to pin 2 of the comparator U1:1; pin 3 of the comparator U1:1 is connected to one end of the resistor R8, the other end of the resistor R8 is connected to one end of the resistor R7, and the other end of the resistor R8 is connected to one end of the resistor R6.

[0009] The other end of the resistor R7 is connected to the power supply VCC; the other end of the resistor R6 is connected to the sliding end and the adjustable end of the sliding rheostat RL1, and the fixed end of the sliding rheostat RL1 is connected to the power ground; the pin 2 of the comparator U1:1 is connected to one end of the resistor R5, and is also connected to the anode end of the diode D1 and one end of the resistor R19.

[0010] The other end of the resistor R19 is connected to the anode end of the indicator light LED1, and the cathode end of the indicator light LED1 is connected to the power ground.

[0011] The temperature signal collected by the temperature collector P1 is processed by the voltage comparator U1:1 and the control signal outputted can drive the indicator LED1 through the resistor R19.

[0012] The pin of the humidity collector P2 is connected to one end of the resistor R9 and one end of the resistor R10, and the pin of the temperature collector P2 is connected to the power ground; the other end of the resistor R9 is connected to the power supply VCC; the other end of the resistor R10 is connected to one end of the capacitor C3, and the other end of the resistor R10 is connected to one end of the resistor R11; the other end of the resistor C3 is connected to the power ground; the other end of the resistor R11 is connected to one end of the capacitor C4, and the other end of the resistor R11 is connected to one end of the resistor R12 and pin 1 of the comparator U1:2; the other end of the capacitor C4 is connected to pin 2 of the comparator U1:2; the other end of the resistor R12 is connected to pin 2 of the comparator U1:2; pin 3 of the comparator U1:2 is connected to one end of the resistor R16, the other end of the resistor R16 is connected to one end of the resistor R15, and the other end of the resistor R16 is connected to one end of the resistor R14.

[0013] The other end of the resistor R15 is connected to the power supply VCC; the other end of the resistor R14 is connected to the sliding end and the adjustable end of the sliding rheostat RL2, and the fixed end of the sliding rheostat RL2 is connected to the power ground; the pin 2 of the comparator U1:2 is connected to one end of the resistor R13, and the pin 2 of the comparator U1:2 is connected to the anode end of the diode D3 and one end of the resistor R20.

[0014] The other end of the resistor R20 is connected to the anode end of the indicator light LED2, and the cathode end of the indicator light LED2 is connected to the power ground.

[0015] The humidity is collected and the control signal outputted by the voltage comparator is processed and can drive the indicator LED2 through the resistor R20.

[0016] The cathode end of the diode D1, the cathode end of the diode D2, and the cathode end of the diode D3 are connected together to one end of the resistor R17; the other end of the R17 is connected to one end of the resistor R18 and the base end of the transistor Q1; the other end of the resistor R18 is connected to the power ground; the emitter end of the transistor Q1 is connected to the power ground, the collector of the transistor Q1 is connected to the pin of the relay J1, and the collector of the transistor Q1 is connected to the anode end of the diode D4;

[0017] The cathode end of the diode D4 is connected to the power supply VCC; the pin of the relay J1 is connected to the power supply VCC;

[0018] A pin of the relay J1 is connected to a pin of the heater control terminal P3 , and a pin of the relay J1 is connected to a pin of the heater control terminal P3 .

[0019] This application adopts the above technical solution, which has the following beneficial effects:

[0020] The pure hardware temperature and humidity control circuit designed by the utility model has a simple circuit, low cost and is easy to implement;

[0021] By utilizing the upper and lower threshold levels of the hysteresis voltage comparator, faults such as output jitter and frequent flipping caused by input signal fluctuations can be effectively eliminated, and it has strong anti-interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the circuit principle diagram of the temperature and humidity control of the utility model;

[0023] Figure 2 This is a block diagram of the working principle of the temperature and humidity control system of this utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0025] like Figure 1 and Figure 2 As shown, this embodiment describes a switch status indicator comprising a temperature acquisition section, a humidity acquisition section, a data processing section, and an output control section. The output control section can be independently controlled by the temperature acquisition section, the humidity acquisition section, and a button. The temperature acquisition section comprises a temperature collector P1, the humidity acquisition section comprises a humidity collector P2, the data processing section comprises voltage comparators U1:1 and U1:2, and the output control section comprises transistor Q1 and relay J1.

[0026] The temperature acquisition and control part:

[0027] like Figure 1 As shown, the reference voltage V1ref is calculated by the sliding rheostat RL1, the resistor R6, and the resistor R7, and the reference voltage is transmitted to the pin 3 2 of the comparator U1:1 through the resistor R8;

[0028] The reference voltage V1ref is calculated as follows:

[0029]

[0030] The temperature collector P1 is a temperature sensor. Pin 1 of the temperature collector P1 transmits the temperature signal voltage through resistor R2, capacitor C1, and resistor R3 to pin 1-3 of the voltage comparator U1:1. The output signal is fed back to pin 1-3 of the voltage comparator U1:1 through pin 2-1 of the voltage comparator U1:1, forming a positive feedback circuit. When the ambient temperature is in the rising stage, when the collected temperature signal voltage is greater than the upper temperature threshold V1TH+, pin 2-1 of the voltage comparator U1:1 outputs a high level. When the collected temperature signal voltage is less than the lower temperature threshold V1TH-, pin 2-1 of the voltage comparator U1:1 outputs a high or low level.

[0031] The calculation formula for the upper temperature threshold V1TH+ is as follows:

[0032]

[0033] The temperature lower threshold VTH is calculated as follows:

[0034]

[0035] The temperature signal collected by temperature collector P1 is processed by voltage comparator U1:1, and the output control signal drives indicator LED1 through resistor R19. If the control signal output level is high, indicator LED1 lights up; if the control signal output level is low, indicator LED1 goes out.

[0036] The temperature signal collected by the specific temperature collector P1 is processed by the voltage comparator U1:1 and the output control signal can drive the output control circuit through the diode D1. Figure 2 As shown, if the control signal output level is high, the output control circuit is enabled, and if the control signal output level is low, the output control circuit is disabled. The output of the output control circuit can be controlled according to the upper and lower temperature thresholds to control the high and low levels of the output control circuit and thus control the heater control terminal P3.

[0037] Pin 1 of the temperature collector P1 is connected to one end of the resistor R1 and one end of the resistor R2, and pin 2 of the temperature collector P1 is connected to the power ground; the other end of the resistor R1 is connected to the power supply VCC; the other end of the resistor R2 is connected to one end of the capacitor C1 and one end of the resistor R3; the other end of the resistor C1 is connected to the power ground; the other end of the resistor R3 is connected to one end of the capacitor C2 and one end of the resistor R4 and pin 3 of the comparator U1:1; the other end of the capacitor C2 is connected to pin 1 of the comparator U1:1; the other end of the resistor R4 is connected to pin 1 of the comparator U1:1; Pin 3 (2) of comparator U1:1 is connected to one end of resistor R8, the other end of which is connected to one end of resistor R7, and the other end of which is connected to one end of resistor R6; the other end of resistor R7 is connected to power supply VCC; the other end of resistor R6 is connected to the sliding end and adjustable end of sliding rheostat RL1, and the fixed end of sliding rheostat RL1 is connected to power supply ground; Pin 2 (1) of comparator U1:1 is connected to one end of resistor R5, and is also connected to the anode end of diode D1 and one end of resistor R19. The other end of resistor R19 is connected to the anode end of indicator light LED1, and the cathode end of indicator light LED1 is connected to power supply ground. Pin 4 (4) of comparator U1:1 is connected to power supply VCC, and pin 5 (8) is connected to power supply GND.

[0038] Button control:

[0039] Button S1 can drive the output control circuit through diode D2. Figure 2 As shown, if the control signal output level is high, the output control circuit is valid, and if the control signal output level is low, the output control circuit is invalid. Specifically, one end of the button S1 is connected to the power supply VCC, and the other end of the button S1 is connected to the anode end of the diode D2.

[0040] Described humidity acquisition control part:

[0041] like Figure 1 As shown, the reference voltage V2ref is calculated by the sliding rheostat RL2, the resistor R14, and the resistor R15, and the reference voltage is transmitted to the pin 3 6 of the comparator U1:2 through the resistor R16;

[0042] The reference voltage V2ref is calculated as follows:

[0043]

[0044] The humidity collector P2 is a humidity sensor. Pin 1 of the humidity collector P2 transmits the humidity signal voltage through resistor R10, capacitor C3, and resistor R11 to pin 1-5 of the voltage comparator U1:2; the output signal is fed back to pin 1-5 of the voltage comparator U1:2 through pin 2-7 of the voltage comparator U1:2, forming a positive feedback circuit; when the ambient humidity is in the rising stage, when the collected humidity signal voltage is greater than the humidity upper limit threshold V2TH+, pin 2-7 of the voltage comparator U1:2 outputs a high level; when the collected humidity signal voltage is less than the humidity lower limit threshold V2TH-, pin 2-7 of the voltage comparator U1:2 outputs a low level;

[0045] The calculation formula for the humidity upper threshold V2TH+ is as follows:

[0046]

[0047] The calculation formula for the humidity lower threshold VTH is as follows:

[0048]

[0049] The humidity is collected and processed by the voltage comparator. The control signal output can drive the indicator LED2 through the resistor R20. If the control signal output level is high, the indicator LED2 will light up. If the control signal output level is low, the indicator LED2 will go out.

[0050] The humidity signal collected by the humidity collector P2 is processed by the voltage comparator and the control signal output can be driven by the diode D3 to output the control circuit. Figure 2 As shown, if the control signal output level is high, the output control circuit is enabled, and if the control signal output level is low, the output control circuit is disabled. The output of the output control circuit can be controlled according to the upper and lower humidity thresholds to control the high and low levels of the output control circuit and thus control the heater control terminal P3.

[0051] Specifically, pin 1 of the humidity collector P2 is connected to one end of the resistor R9 and one end of the resistor R10, and pin 2 of the temperature collector P2 is connected to the power ground; the other end of the resistor R9 is connected to the power supply VCC; the other end of the resistor R10 is connected to one end of the capacitor C3, and the other end of the resistor R10 is connected to one end of the resistor R11; the other end of the resistor C3 is connected to the power ground; the other end of the resistor R11 is connected to one end of the capacitor C4, and the other end of the resistor R11 is connected to one end of the resistor R12 and pin 5 of the comparator U1:2; the other end of the capacitor C4 is connected to pin 27 of the comparator U1:2; the other end of the resistor R12 is connected to pin 27 of the comparator U1:2 ; Pin three 6 of the comparator U1:2 is connected to one end of the resistor R16, the other end of the resistor R16 is connected to one end of the resistor R15, and the other end of the resistor R16 is connected to one end of the resistor R14; the other end of the resistor R15 is connected to the power supply VCC; the other end of the resistor R14 is connected to the sliding end and the adjustable end of the sliding rheostat RL2, and the fixed end of the sliding rheostat RL2 is connected to the power ground; Pin two 7 of the comparator U1:2 is connected to one end of the resistor R13, and pin two 7 of the comparator U1:2 is connected to the anode end of the diode D3 and one end of the resistor R20, the other end of the resistor R20 is connected to the anode end of the indicator light LED2, and the cathode end of the indicator light LED2 is connected to the power ground.

[0052] The output control part:

[0053] like Figure 1 As shown, the temperature control signal passes through the cathode end of the diode D1, the key control signal passes through the cathode end of the diode D2, and the humidity control signal passes through the cathode end of the diode D3, which can respectively control the transistor Q1 through the current limiting resistor R17 to drive the opening and closing of the output contact of the relay J1, and then drive the controller P3.

[0054] Specifically, the cathode end of the diode D1, the cathode end of the diode D2, and the cathode end of the diode D3 are connected together to one end of the resistor R17; the other end of the R17 is connected to one end of the resistor R18 and to the base end of the transistor Q1; the other end of the resistor R18 is connected to the power ground; the emitter end of the transistor Q1 is connected to the power ground, the collector of the transistor Q1 is connected to pin 1 of the relay J1, and the collector of the transistor Q1 is connected to the anode end of the diode D4; the cathode end of the diode D4 is connected to the power supply VCC; pin 4 of the relay J1 is connected to the power supply VCC, pin 2 of the relay J1 is connected to pin 2 of the heater control terminal P3, and pin 5 of the relay J1 is connected to pin 1 of the heater control terminal P3.

[0055] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A switch status indicator, characterized in that: It includes a temperature acquisition part, a humidity acquisition part, a data processing part and an output control part. The temperature acquisition part is a temperature collector P1, the humidity acquisition part is a humidity collector P2, the data processing part is a voltage comparator U1:1 and a voltage comparator U1:2, and the output control part is a transistor Q1 and a relay J1. The temperature control signal passes through the cathode end of diode D1, the key control signal passes through the cathode end of diode D2, and the humidity control signal passes through the cathode end of diode D3, and can respectively control transistor Q1 through current limiting resistor R17 to drive the opening and closing of the output contact of relay J1.

2. The switch status indicator according to claim 1, characterized in that: The pin of the temperature collector P1 is connected to one end of the resistor R1 and one end of the resistor R2, and the pin of the temperature collector P1 is connected to the power ground; the other end of the resistor R1 is connected to the power supply VCC; the other end of the resistor R2 is connected to one end of the capacitor C1 and one end of the resistor R3; the other end of the capacitor C1 is connected to the power ground; the other end of the resistor R3 is connected to one end of the capacitor C2 and one end of the resistor R4 and pin 1 of the comparator U1:1; the other end of the capacitor C2 is connected to pin 2 of the comparator U1:1; the other end of the resistor R4 is connected to pin 2 of the comparator U1:1; pin 3 of the comparator U1:1 is connected to one end of the resistor R8, the other end of the resistor R8 is connected to one end of the resistor R7, and the other end of the resistor R8 is connected to one end of the resistor R6.

3. The switch status indicator according to claim 2, characterized in that: The other end of the resistor R7 is connected to the power supply VCC; the other end of the resistor R6 is connected to the sliding end and the adjustable end of the sliding rheostat RL1, and the fixed end of the sliding rheostat RL1 is connected to the power ground; the pin 2 of the comparator U1:1 is connected to one end of the resistor R5, and is also connected to the anode end of the diode D1 and one end of the resistor R19.

4. The switch status indicator according to claim 3, characterized in that: The other end of the resistor R19 is connected to the anode end of the indicator light LED1, and the cathode end of the indicator light LED1 is connected to the power ground.

5. The switch status indicator according to claim 4, characterized in that: The temperature signal collected by the temperature collector P1 is processed by the voltage comparator U1:1 and the control signal outputted can drive the indicator LED1 through the resistor R19.

6. The switch status indicator according to claim 5, characterized in that: The pin of the humidity collector P2 is connected to one end of the resistor R9 and one end of the resistor R10, and the pin of the temperature collector P2 is connected to the power ground; the other end of the resistor R9 is connected to the power supply VCC; the other end of the resistor R10 is connected to one end of the capacitor C3, and the other end of the resistor R10 is connected to one end of the resistor R11; the other end of the capacitor C3 is connected to the power ground; the other end of the resistor R11 is connected to one end of the capacitor C4, and the other end of the resistor R11 is connected to one end of the resistor R12 and pin 1 of the comparator U1:2; the other end of the capacitor C4 is connected to pin 2 of the comparator U1:2; the other end of the resistor R12 is connected to pin 2 of the comparator U1:2; pin 3 of the comparator U1:2 is connected to one end of the resistor R16, the other end of the resistor R16 is connected to one end of the resistor R15, and the other end of the resistor R16 is connected to one end of the resistor R14.

7. The switch status indicator according to claim 6, characterized in that: The other end of the resistor R15 is connected to the power supply VCC; the other end of the resistor R14 is connected to the sliding end and the adjustable end of the sliding rheostat RL2, and the fixed end of the sliding rheostat RL2 is connected to the power ground; the pin 2 of the comparator U1:2 is connected to one end of the resistor R13, and the pin 2 of the comparator U1:2 is connected to the anode end of the diode D3 and one end of the resistor R20.

8. The switch status indicator according to claim 7, characterized in that: The other end of the resistor R20 is connected to the anode end of the indicator light LED2, and the cathode end of the indicator light LED2 is connected to the power ground.

9. The switch status indicator according to claim 8, characterized in that: The humidity is collected and the control signal outputted by the voltage comparator is processed and can drive the indicator LED2 through the resistor R20.

10. The switch status indicator according to claim 9, characterized in that: The cathode end of the diode D1, the cathode end of the diode D2, and the cathode end of the diode D3 are connected together to one end of the resistor R17; the other end of the R17 is connected to one end of the resistor R18 and the base end of the transistor Q1; the other end of the resistor R18 is connected to the power ground; the emitter end of the transistor Q1 is connected to the power ground, the collector of the transistor Q1 is connected to the pin of the relay J1, and the collector of the transistor Q1 is connected to the anode end of the diode D4; The cathode end of the diode D4 is connected to the power supply VCC; the pin of the relay J1 is connected to the power supply VCC; A pin of the relay J1 is connected to a pin of the heater control terminal P3 , and a pin of the relay J1 is connected to a pin of the heater control terminal P3 .

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