A generator set voltage monitoring device

Abstract

The utility model relates to a kind of power generation voltage monitoring devices of generator set, including voltage drop transformer, schmitt trigger, power conversion module, switch module and alarm module;The input end of the voltage drop transformer is connected the output end of diesel generator set, the output end of the voltage drop transformer is connected the input end of the schmitt trigger, the output end of the schmitt trigger is connected the control end of the switch module;The input end of the power conversion module is connected the output end of the diesel generator set, the output end of the power conversion module is respectively connected the power supply end of the schmitt trigger and one end of the switch module, the other end of the switch module is connected the positive pole of the alarm module, the negative pole of the alarm module is grounded;The utility model can monitor the stability of alternating voltage output by diesel generator set in real time, to improve the operation stability of electrical equipment.

Description

Technical Field

[0001] This utility model relates to the field of diesel generator testing technology, specifically to a generator set voltage monitoring device. Background Technology

[0002] Diesel generator sets are often used for field power generation or in situations where there is no municipal power grid supply to provide temporary power. When used as a temporary power supply device, the stability of the power supply from a diesel generator set is not monitored by any relevant devices; the operating status of the generator set can usually only be reflected by the operation of the electrical equipment. However, existing diesel generator sets are not equipped with power supply voltage stability monitoring devices, leading to unstable operating conditions of the electrical equipment and thus affecting its performance. Utility Model Content

[0003] In order to solve the technical problem that the diesel generator set is not equipped with a power supply voltage stability detection device in the prior art, which leads to unstable operation of electrical equipment and thus affects the working performance of the electrical equipment, this utility model provides a generator set power generation voltage monitoring device.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A generator set voltage monitoring device includes a voltage drop transformer, a Schmitt trigger, a power conversion module, a switching module, and an alarm module; The input terminal of the voltage drop transformer is connected to the output terminal of the diesel generator set, the output terminal of the voltage drop transformer is connected to the input terminal of the Schmitt trigger, and the output terminal of the Schmitt trigger is connected to the control terminal of the switching module. The input terminal of the power conversion module is connected to the output terminal of the diesel generator set. The output terminal of the power conversion module is connected to the power supply terminal of the Schmitt trigger and one end of the switch module. The other end of the switch module is connected to the positive terminal of the alarm module, and the negative terminal of the alarm module is grounded.

[0005] The beneficial effects of this invention are as follows: the AC voltage output from the diesel generator set is stepped down by a voltage-drop transformer to output low-voltage AC power. A Schmitt trigger is used to monitor the voltage fluctuation of the low-voltage AC power. When a fault occurs in the diesel generator set, causing a sudden change in the output voltage, and the amplitude of the change exceeds a preset threshold range, the Schmitt trigger is activated to output a high-level voltage signal. The switching module is turned on under the trigger of the high-level signal, and the alarm module is powered on to issue an alarm signal. It can be seen that this invention can monitor the stability of the AC voltage output from the diesel generator set in real time, thereby improving the operational stability of electrical equipment.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, it also includes a signal amplifier, the input of which is connected to the output of the Schmitt trigger, and the output of which is connected to the control terminal of the switching module.

[0008] The advantage of adopting the above-mentioned further solution is that by setting a signal amplifier, the control and driving capability of the switching module can be improved.

[0009] Furthermore, the signal amplifier includes an operational amplifier, a first resistor, and a second resistor. The non-inverting input of the operational amplifier is connected to the output of the Schmitt trigger, and the inverting input of the operational amplifier is connected to one end of the first resistor and one end of the second resistor, respectively. The other end of the first resistor is grounded, and the other end of the second resistor is connected to the output of the operational amplifier. The output of the operational amplifier is connected to the control terminal of the switching module.

[0010] Furthermore, the switching module includes a third resistor, a transistor, and a fourth resistor. The output terminal of the operational amplifier is connected to one end of the third resistor, the other end of the third resistor is connected to the base of the transistor, the collector of the transistor is connected to the output terminal of the power conversion module, the emitter of the transistor is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the positive terminal of the alarm module.

[0011] Furthermore, the alarm module includes a speaker, the other end of the fourth resistor is connected to the positive terminal of the speaker, and the negative terminal of the speaker is grounded.

[0012] Furthermore, the alarm module also includes a light-emitting diode (LED), with the other end of the fourth resistor connected to the positive terminal of the LED and the negative terminal of the LED grounded.

[0013] Furthermore, the power conversion module includes a transformer, a rectifier bridge, and a first voltage drop chip; the input terminal of the transformer is connected to the output terminal of the diesel generator set, the output terminal of the transformer is connected to the input terminal of the rectifier bridge, the output terminal of the rectifier bridge is connected to the input terminal of the first voltage drop chip, and the output terminal of the first voltage drop chip is connected to the power supply terminal of the Schmitt trigger and one end of the switching module, respectively.

[0014] Furthermore, it also includes a voltage drop module, a microcontroller, and a wireless communication module. The input terminal of the voltage drop module is connected to the output terminal of the power conversion module, and the output terminal of the voltage drop module is connected to the power supply terminal of the microcontroller and the power supply terminal of the wireless communication module, respectively. The signal input terminal of the microcontroller is connected to the output terminal of the Schmitt trigger, and the transceiver terminal of the microcontroller is connected to the transceiver terminal of the wireless communication module.

[0015] The beneficial effect of adopting the above-mentioned further solution is that, through the microcontroller and wireless communication module, the high and low level signals of the Schmitt trigger output terminal can also be sent to an external communication device, so as to monitor the power generation stability of the diesel generator set in real time through the external communication device.

[0016] Furthermore, the voltage drop module includes a second voltage drop chip, the input terminal of which is connected to the output terminal of the power conversion module, and the output terminal of which is connected to the power supply terminal of the microcontroller and the power supply terminal of the wireless communication module, respectively.

[0017] Furthermore, the wireless communication module is a Bluetooth module, a 4G communication module, a 5G communication module, or a GSM communication module. Attached Figure Description

[0018] Figure 1 This is a circuit block diagram of the present invention; Figure 2 This is the circuit diagram for a signal amplifier; Figure 3 This is the circuit diagram for the switching module; Figure 4 This is the circuit diagram for the alarm module; Figure 5 This is the circuit diagram for the power conversion module; Figure 6 This is the circuit diagram for the voltage drop module.

[0019] The attached diagram lists the components represented by each number as follows: 1. Voltage drop transformer, 2. Schmitt trigger, 3. Power conversion module, 4. Signal amplifier, 5. Switching module, 6. Alarm module, 7. Voltage drop module, 8. Microcontroller, 9. Wireless communication module. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] like Figure 1 As shown, this embodiment provides a generator set voltage monitoring device, including a voltage drop transformer 1, a Schmitt trigger 2, a signal amplifier 4, a power conversion module 3, a switch module 5, an alarm module 6, a voltage drop module 7, a microcontroller 8, and a wireless communication module 9. The input terminal of the voltage drop transformer 1 is connected to the output terminal of the diesel generator set, the output terminal of the voltage drop transformer 1 is connected to the input terminal of the Schmitt trigger 2, and the output terminal of the Schmitt trigger 2 is connected to the control terminal of the switch module 5. The input terminal of the power conversion module 3 is connected to the output terminal of the diesel generator set. The output terminal of the power conversion module 3 is connected to the power terminal of the Schmitt trigger 2 and one end of the switch module 5. The other end of the switch module 5 is connected to the positive terminal of the alarm module 6, and the negative terminal of the alarm module 6 is grounded.

[0022] The input terminal of the signal amplifier 4 is connected to the output terminal of the Schmitt trigger 2, and the output terminal of the signal amplifier 4 is connected to the control terminal of the switch module 5. By setting the signal amplifier 4, the control and driving capability of the switch module 5 can be improved.

[0023] The input terminal of the voltage drop module 7 is connected to the output terminal of the power conversion module 3, and the output terminal of the voltage drop module 7 is connected to the power supply terminal of the microcontroller 8 and the power supply terminal of the wireless communication module 9 respectively; the signal input terminal of the microcontroller 8 is connected to the output terminal of the Schmitt trigger 2, and the transceiver terminal of the microcontroller 8 is connected to the transceiver terminal of the wireless communication module 9.

[0024] The microcontroller 8 and wireless communication module 9 can also transmit the high and low level signals at the output of the Schmitt trigger 2 to an external communication device, allowing real-time monitoring of the diesel generator set's power generation stability. The wireless communication module 9 can be a Bluetooth module, a 4G communication module, a 5G communication module, or a GSM communication module.

[0025] This embodiment of the invention steps down the AC voltage output from the diesel generator set through a voltage-drop transformer 1 to output low-voltage AC power. A Schmitt trigger 2 is used to monitor the voltage fluctuation of the low-voltage AC power. When a fault occurs in the diesel generator set, causing a sudden change in the output voltage, and the amplitude of the change exceeds a preset threshold range, the Schmitt trigger 2 is triggered to output a high-level voltage signal. The switching module 5 is turned on under the trigger of the high-level signal, and the alarm module 6 is powered on to issue an alarm signal. It can be seen that this invention can monitor the stability of the AC voltage output from the diesel generator set in real time, thereby improving the operational stability of electrical equipment.

[0026] like Figure 2 As shown, the signal amplifier 4 includes an operational amplifier U1, a first resistor R1, and a second resistor R2. The non-inverting input of the operational amplifier U1 is connected to the output of the Schmitt trigger 2. The inverting input of the operational amplifier U1 is connected to one end of the first resistor R1 and one end of the second resistor R2, respectively. The other end of the first resistor R1 is grounded, and the other end of the second resistor R2 is connected to the output of the operational amplifier U1. The output of the operational amplifier U1 is connected to the control terminal of the switch module 5.

[0027] The amplification formula for signal amplifier 10 is as follows: Vout = Vin1 + R2 / R1, where Vin represents the output voltage of Schmitt trigger 2, Vout represents the output voltage of signal amplifier 10, R1 represents the resistance value of the first resistor R1, and R2 represents the resistance value of the second resistor R2.

[0028] like Figure 3 As shown, the switching module 5 includes a third resistor R3, a transistor Q1, and a fourth resistor R4. The output terminal of the operational amplifier U1 is connected to one end of the third resistor R3, the other end of the third resistor R3 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the output terminal of the power conversion module 3, the emitter of the transistor Q1 is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to the positive terminal of the alarm module 6.

[0029] When the Schmitt trigger 2 outputs a low-level voltage, the switching module 5 composed of transistor Q1 is in the off state; when the comparator 9 outputs a high-level voltage, the switching module 5 composed of transistor Q1 is in the on state, and the alarm module 6 is powered on to issue an alarm message.

[0030] like Figure 4 As shown, the alarm module 6 includes a speaker BL and a light-emitting diode D1. The other end of the fourth resistor R4 is connected to the positive terminal of the speaker BL and the positive terminal of the light-emitting diode D1, respectively. The negative terminal of the speaker BL is grounded, and the negative terminal of the light-emitting diode D1 is also grounded. After the alarm module 6 is powered on, the speaker BL emits an alarm sound, and the light-emitting diode D1 emits a light alarm.

[0031] like Figure 5 As shown, the power conversion module 3 includes a transformer T1, a rectifier bridge U2, and a first voltage drop chip U3; the input terminal of the transformer T1 is connected to the output terminal of the diesel generator set, the output terminal of the transformer T1 is connected to the input terminal of the rectifier bridge U2, the output terminal of the rectifier bridge U2 is connected to the input terminal of the first voltage drop chip U3, and the output terminal of the first voltage drop chip U3 is connected to the power supply terminal of the Schmitt trigger 2 and one end of the switching module 5, respectively.

[0032] The output voltage of the diesel generator set is stepped down to 9V AC by transformer T1, then converted to 9V DC by rectifier bridge U2, and finally converted to 5V DC by the first voltage drop chip U3 (model 7850). The first capacitor C1 and the second capacitor C2 are used to filter the voltage at the input terminal of the first voltage drop chip U3; the third capacitor C3 and the fourth capacitor C4 are used to filter the voltage at the output terminal of the first voltage drop chip U3.

[0033] like Figure 6 As shown, the voltage drop module 7 includes a second voltage drop chip U4. The input terminal of the second voltage drop chip U4 is connected to the output terminal of the power conversion module 3, and the output terminal of the second voltage drop chip U4 is connected to the power supply terminal of the microcontroller 8 and the power supply terminal of the wireless communication module 9, respectively. The second voltage drop chip U4 is an LM1117-3.3V voltage drop chip.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the concept and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A generator set voltage monitoring device, characterized in that: It includes a voltage drop transformer (1), a Schmitt trigger (2), a power conversion module (3), a switching module (5), and an alarm module (6); The input terminal of the voltage drop transformer (1) is connected to the output terminal of the diesel generator set, the output terminal of the voltage drop transformer (1) is connected to the input terminal of the Schmitt trigger (2), and the output terminal of the Schmitt trigger (2) is connected to the control terminal of the switch module (5). The input terminal of the power conversion module (3) is connected to the output terminal of the diesel generator set. The output terminal of the power conversion module (3) is connected to the power terminal of the Schmitt trigger (2) and one end of the switch module (5). The other end of the switch module (5) is connected to the positive terminal of the alarm module (6). The negative terminal of the alarm module (6) is grounded.

2. The generator voltage monitoring device according to claim 1, characterized in that: It also includes a signal amplifier (4), the input of which is connected to the output of the Schmitt trigger (2), and the output of which is connected to the control terminal of the switch module (5).

3. The generator voltage monitoring device according to claim 2, characterized in that: The signal amplifier (4) includes an operational amplifier (U1), a first resistor (R1), and a second resistor (R2). The non-inverting input of the operational amplifier (U1) is connected to the output of the Schmitt trigger (2). The inverting input of the operational amplifier (U1) is connected to one end of the first resistor (R1) and one end of the second resistor (R2). The other end of the first resistor (R1) is grounded. The other end of the second resistor (R2) is connected to the output of the operational amplifier (U1). The output of the operational amplifier (U1) is connected to the control terminal of the switching module (5).

4. The generator voltage monitoring device according to claim 3, characterized in that: The switching module (5) includes a third resistor (R3), a transistor (Q1), and a fourth resistor (R4). The output terminal of the operational amplifier (U1) is connected to one end of the third resistor (R3), the other end of the third resistor (R3) is connected to the base of the transistor (Q1), the collector of the transistor (Q1) is connected to the output terminal of the power conversion module (3), the emitter of the transistor (Q1) is connected to one end of the fourth resistor (R4), and the other end of the fourth resistor (R4) is connected to the positive terminal of the alarm module (6).

5. The generator voltage monitoring device according to claim 4, characterized in that: The alarm module (6) includes a speaker (BL), the other end of the fourth resistor (R4) is connected to the positive terminal of the speaker (BL), and the negative terminal of the speaker (BL) is grounded.

6. The generator voltage monitoring device according to claim 5, characterized in that: The alarm module (6) also includes a light-emitting diode (D1), the other end of the fourth resistor (R4) is connected to the positive terminal of the light-emitting diode (D1), and the negative terminal of the light-emitting diode (D1) is grounded.

7. The generator voltage monitoring device according to claim 1, characterized in that: The power conversion module (3) includes a transformer (T1), a rectifier bridge (U2), and a first voltage drop chip (U3). The input terminal of the transformer (T1) is connected to the output terminal of the diesel generator set, the output terminal of the transformer (T1) is connected to the input terminal of the rectifier bridge (U2), the output terminal of the rectifier bridge (U2) is connected to the input terminal of the first voltage drop chip (U3), and the output terminal of the first voltage drop chip (U3) is connected to the power supply terminal of the Schmitt trigger (2) and one end of the switching module (5).

8. The generator voltage monitoring device according to claim 1, characterized in that: It also includes a voltage drop module (7), a microcontroller (8) and a wireless communication module (9). The input terminal of the voltage drop module (7) is connected to the output terminal of the power conversion module (3). The output terminal of the voltage drop module (7) is connected to the power supply terminal of the microcontroller (8) and the power supply terminal of the wireless communication module (9). The signal input terminal of the microcontroller (8) is connected to the output terminal of the Schmitt trigger (2). The transceiver terminal of the microcontroller (8) is connected to the transceiver terminal of the wireless communication module (9).

9. The generator voltage monitoring device according to claim 8, characterized in that: The voltage drop module (7) includes a second voltage drop chip (U4). The input terminal of the second voltage drop chip (U4) is connected to the output terminal of the power conversion module (3). The output terminal of the second voltage drop chip (U4) is connected to the power supply terminal of the microcontroller (8) and the power supply terminal of the wireless communication module (9).

10. The generator voltage monitoring device according to claim 8, characterized in that: The wireless communication module (9) is a Bluetooth module, a 4G communication module, a 5G communication module, or a GSM communication module.

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