A mobile generator set

Abstract

The utility model relates to a mobile generator set, including the protection box of inside cavity structure, the cavity of protection box is fixed with diesel generator set, fixedly be equipped with the leakage detection device on the protection box, the utility model discloses through voltage acquisition module gathers the voltage on the protection box, and utilize the comparator to let the voltage of collection and reference voltage compare, if the voltage on the protection box is higher than the preset voltage 36V, the reference voltage of comparator's opposite phase input end is lower than the voltage of the same phase input end, and the comparator output high level voltage, and high level voltage controls switch module to turn on after the amplification of signal amplifier, and after switch module turns on, the alarm module supplies and sends out the alarm signal. Whether the protection box has the electric shock danger is detected thereby.

Description

Technical Field

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

[0002] For ease of transport and relocation, some diesel generator sets are fixed in a casing, making them convenient to move. However, the casing is usually made of conductive metal. Therefore, if the generator set leaks electricity and the casing voltage is not checked, there may be a risk of electric shock to the casing during operation. Utility Model Content

[0003] In order to solve the technical problem that the existing technology does not detect the voltage of the enclosure, which may pose a risk of electric shock to the enclosure during the operation of the generator set, this utility model provides a mobile generator set.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A mobile generator set includes a protective box with an internal cavity structure, a diesel generator set is fixedly installed inside the cavity of the protective box, and a leakage current detection device is fixedly installed on the protective box. The leakage current detection device includes a voltage acquisition module, a comparator, a signal amplifier, a switch module, an alarm module, and a power conversion module. The input terminal of the voltage acquisition module is connected to the protection box, the output terminal of the voltage acquisition module is connected to the non-inverting input terminal of the comparator, the ground terminal of the voltage acquisition module is grounded, and the inverting input terminal of the comparator is connected to a reference voltage. The input terminal of the power conversion module is connected to the voltage output terminal of the diesel generator set, the output terminal of the comparator is connected to the input terminal of the signal amplifier, the output terminal of the signal amplifier is connected to the control terminal of the switch module, one end of the switch module is connected to the output terminal of the power conversion 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: A voltage acquisition module collects the voltage on the protection box, and a comparator compares the collected voltage with a reference voltage. If the voltage on the protection box is higher than the preset voltage of 36V, the reference voltage at the inverting input of the comparator is lower than the voltage at the non-inverting input, causing the comparator to output a high-level voltage. This high-level voltage is amplified by a signal amplifier and then controls the switching module to conduct. Once the switching module is on, the alarm module is powered on and issues an alarm signal. This process detects whether the protection box poses a risk of electric shock.

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

[0007] Furthermore, it also includes a voltage regulation module, the input terminal of which is connected to the output terminal of the power conversion module, the output terminal of which is connected to the inverting input terminal of the comparator, and the ground terminal of which is grounded.

[0008] The advantage of adopting the above-mentioned further solution is that, by setting up a voltage regulating module, the magnitude of the reference voltage can be adjusted as needed to identify different levels of dangerous voltage on the protection box.

[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 comparator. 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 voltage regulation module includes a fifth resistor and a sixth resistor. The sixth resistor is a variable resistor. One end of the fifth resistor is connected to the output terminal of the power conversion module, and the other end of the fifth resistor is connected to one end of the sixth resistor. The other end of the sixth resistor is grounded, and one end of the sixth resistor is connected to the inverting input terminal of the comparator.

[0014] Furthermore, the voltage acquisition module includes a seventh resistor and an eighth resistor. One end of the seventh resistor is connected to the protection box, and the other end of the seventh resistor is connected to one end of the eighth resistor, the other end of the eighth resistor being grounded. One end of the eighth resistor is connected to the non-inverting input terminal of the comparator.

[0015] 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. 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 comparator. The transceiver terminal of the microcontroller is connected to the transceiver terminal of the wireless communication module.

[0016] The beneficial effect of adopting the above-mentioned further solution is that, by setting up a microcontroller and a wireless communication module, a high-level signal can be output when the voltage on the protection box is detected to be too high, and the high-level signal can be transmitted to an external communication terminal through the microcontroller and the wireless communication module so that the detected high-level signal information can be viewed on the external communication terminal.

[0017] Furthermore, the bottom of the protective box is equipped with multiple casters.

[0018] The advantage of adopting the above-mentioned further solution is that the protective box is easy to move by installing casters. Attached Figure Description

[0019] Figure 1 This is the circuit schematic diagram of this utility model; 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 of the voltage regulation module; Figure 6 This is the circuit diagram of the voltage acquisition module; Figure 7 This is a schematic diagram of the structure of this utility model.

[0020] The attached diagram lists the components represented by each number as follows: 1. Protection box; 2. Air inlet window; 3. Diesel generator set; 4. Leakage detection device; 5. Cooling fan; 6. Exhaust window; 7. Casters; 8. Voltage acquisition module; 9. Comparator; 10. Signal amplifier; 11. Switch module; 12. Alarm module; 13. Power conversion module; 14. Voltage drop module; 15. Voltage regulation module; 16. Microcontroller; 17. Wireless communication module. Detailed Implementation

[0021] 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.

[0022] like Figure 1As shown, this embodiment provides a mobile generator set, including a protective box 1 with an internal cavity structure. A diesel generator set 3 is fixedly installed inside the cavity of the protective box 1, and a leakage detection device 4 is fixedly installed on the protective box 1.

[0023] The leakage current detection device 4 includes a voltage acquisition module 8, a voltage regulation module 15, a comparator 9, a signal amplifier 10, a switch module 11, an alarm module 12, a power conversion module 13, a voltage drop module 14, a microcontroller 16, and a wireless communication module 17. The input terminal of the voltage acquisition module 8 is connected to the protection box 1, the output terminal of the voltage acquisition module 8 is connected to the non-inverting input terminal of the comparator 9, the ground terminal of the voltage acquisition module 8 is grounded, and the inverting input terminal of the comparator 9 is connected to a reference voltage. The input terminal of the power conversion module 13 is connected to the voltage output terminal of the diesel generator set 3, the output terminal of the comparator 9 is connected to the input terminal of the signal amplifier 10, the output terminal of the signal amplifier 10 is connected to the control terminal of the switch module 11, one end of the switch module 11 is connected to the output terminal of the power conversion module 13, the other end of the switch module 11 is connected to the positive terminal of the alarm module 12, and the negative terminal of the alarm module 12 is grounded. The power conversion module 13 is a power supply that converts 110V to 220V AC voltage into 12V DC voltage, and the voltage drop module 14 is a voltage drop chip that converts 12V DC voltage into 5V DC voltage.

[0024] The input terminal of the voltage regulating module 15 is connected to the output terminal of the power conversion module 13, and the output terminal of the voltage regulating module 15 is connected to the inverting input terminal of the comparator 9. The ground terminal of the voltage regulating module 15 is grounded. By setting the voltage regulating module 15, the magnitude of the reference voltage can be adjusted as needed to identify different levels of dangerous voltage on the protection box 1.

[0025] The input terminal of the voltage drop module 14 is connected to the output terminal of the power conversion module 13. The output terminal of the voltage drop module 14 is connected to the power supply terminals of the microcontroller 16 and the wireless communication module 17, respectively. The signal input terminal of the microcontroller 16 is connected to the output terminal of the comparator 9, and the transceiver terminal of the microcontroller 16 is connected to the transceiver terminal of the wireless communication module 17. The wireless communication module 17 can be a 4G communication module, a 5G communication module, a Bluetooth communication module, or a GSM communication module. By configuring the microcontroller 16 and the wireless communication module 17, a high-level signal can be output when an overvoltage is detected on the protection box 1. This high-level signal is then transmitted to an external communication terminal via the microcontroller 16 and the wireless communication module 17, allowing the detected high-level signal information to be viewed on the external communication terminal.

[0026] This embodiment of the invention uses a voltage acquisition module 8 to acquire the voltage on the protection box 1, and a comparator 9 to compare the acquired voltage with a reference voltage. If the voltage on the protection box 1 is higher than the preset voltage of 36V, and the reference voltage at the inverting input terminal of the comparator 9 is lower than the voltage at the non-inverting input terminal, the comparator 9 outputs a high-level voltage. This high-level voltage is amplified by the signal amplifier 10 and then controls the switch module 11 to conduct. After the switch module 11 is conducted, the alarm module 12 is powered on and sends an alarm signal. This detects whether the protection box 1 poses a risk of electric shock.

[0027] like Figure 2 As shown, the signal amplifier 10 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 comparator 9. 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, 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 switching module 11. The amplification formula of the signal amplifier 10 is as follows: Vout = Vin1 + R2 / R1, where Vin represents the output voltage of comparator 9, 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 11 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 13, 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 12.

[0029] When comparator 9 outputs a low-level voltage, the switching module 11 composed of transistor Q1 is in the off state; when comparator 9 outputs a high-level voltage, the switching module 11 composed of transistor Q1 is in the on state, and the alarm module 12 is powered on to issue an alarm message.

[0030] like Figure 4 As shown, the alarm module 12 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. The negative terminals of both the speaker BL and the light-emitting diode D1 are grounded. After the alarm module 12 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 voltage regulation module 15 includes a fifth resistor R5 and a sixth resistor R6. The sixth resistor R6 is a variable resistor. One end of the fifth resistor R5 is connected to the output terminal of the power conversion module 13, and the other end of the fifth resistor R5 is connected to one end of the sixth resistor R6. The other end of the sixth resistor R6 is grounded, and one end of the sixth resistor R6 is connected to the inverting input terminal of the comparator 9.

[0032] By adjusting the resistance value of the sixth resistor R6, the voltage across the sixth resistor R6 can be adjusted, thereby achieving the function of adjusting the reference voltage.

[0033] like Figure 6 As shown, the voltage acquisition module 8 includes a seventh resistor R7 and an eighth resistor R8. One end of the seventh resistor R7 is connected to the protection box 1, and the other end of the seventh resistor R7 is connected to one end of the eighth resistor R8. The other end of the eighth resistor R8 is grounded. One end of the eighth resistor R8 is connected to the non-inverting input terminal of the comparator 9.

[0034] The voltage across the protection box 1 is divided using the seventh resistor R7 and the eighth resistor R8. The voltage across the eighth resistor R8 is then connected to the non-inverting input of the comparator 9. Specifically, the voltage across the seventh resistor R7 can be set to 11 times the resistance of the eighth resistor R8. Then, the voltage U1 across the eighth resistor R8 is: U1 = Ub1 / 12, where Ub is the voltage across the protection box 1.

[0035] like Figure 7 As shown, in some embodiments, the protective box 1 has an air inlet vent 2 at its left end and an exhaust vent 6 at its right end. A cooling fan 5 is also fixed inside the cavity of the protective box 1, located at the exhaust vent 6. The cooling fan 5 facilitates rapid exchange of hot air inside the cavity of the protective box 1 with the outside air, thereby improving the heat dissipation efficiency of the air inside the cavity of the protective box 1. The bottom of the protective box 1 is equipped with multiple casters 7. There are two sets of casters 7, each set with two casters 7, located at the left and right ends of the protective box 1 respectively; the two casters 7 in each set are located on both sides of the protective box 1; the two casters 7 in the right-end set can be configured as swivel casters for easy turning. Each set of two casters 7 facilitates the movement of the protective box 1. Both the air inlet vent 2 and the exhaust vent 6 are equipped with louvers.

[0036] 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 mobile generator set, characterized in that: The protective box (1) has an internal cavity structure. A diesel generator set (3) is fixedly installed inside the cavity of the protective box (1). A leakage detection device (4) is fixedly installed on the protective box (1). The leakage current detection device (4) includes a voltage acquisition module (8), a comparator (9), a signal amplifier (10), a switch module (11), an alarm module (12), and a power conversion module (13). The input terminal of the voltage acquisition module (8) is connected to the protection box (1), the output terminal of the voltage acquisition module (8) is connected to the non-inverting input terminal of the comparator (9), the ground terminal of the voltage acquisition module (8) is grounded, and the inverting input terminal of the comparator (9) is connected to the reference voltage. The input terminal of the power conversion module (13) is connected to the voltage output terminal of the diesel generator set (3), the output terminal of the comparator (9) is connected to the input terminal of the signal amplifier (10), the output terminal of the signal amplifier (10) is connected to the control terminal of the switch module (11), one end of the switch module (11) is connected to the output terminal of the power conversion module (13), the other end of the switch module (11) is connected to the positive terminal of the alarm module (12), and the negative terminal of the alarm module (12) is grounded.

2. The mobile generator set according to claim 1, characterized in that: It also includes a voltage regulating module (15), the input terminal of which is connected to the output terminal of the power conversion module (13), the output terminal of which is connected to the inverting input terminal of the comparator (9), and the ground terminal of which is grounded.

3. The mobile generator set according to claim 2, characterized in that: The signal amplifier (10) 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 comparator (9). 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 (11).

4. The mobile generator set according to claim 3, characterized in that: The switching module (11) 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 (13), 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 (12).

5. The mobile generator set according to claim 4, characterized in that: The alarm module (12) 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 mobile generator set according to claim 5, characterized in that: The alarm module (12) 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 mobile generator set according to claim 2, characterized in that: The voltage regulation module (15) includes a fifth resistor (R5) and a sixth resistor (R6). The sixth resistor (R6) is a variable resistor. One end of the fifth resistor (R5) is connected to the output terminal of the power conversion module (13), and the other end of the fifth resistor (R5) is connected to one end of the sixth resistor (R6). The other end of the sixth resistor (R6) is grounded, and one end of the sixth resistor (R6) is connected to the inverting input terminal of the comparator (9).

8. The mobile generator set according to claim 1, characterized in that: The voltage acquisition module (8) includes a seventh resistor (R7) and an eighth resistor (R8). One end of the seventh resistor (R7) is connected to the protection box (1), and the other end of the seventh resistor (R7) is connected to one end of the eighth resistor (R8). The other end of the eighth resistor (R8) is grounded. One end of the eighth resistor (R8) is connected to the non-inverting input of the comparator (9).

9. The mobile generator set according to claim 1, characterized in that: It also includes a voltage drop module (14), a microcontroller (16) and a wireless communication module (17). The input terminal of the voltage drop module (14) is connected to the output terminal of the power conversion module (13). The output terminal of the voltage drop module (14) is connected to the power supply terminal of the microcontroller (16) and the power supply terminal of the wireless communication module (17). The signal input terminal of the microcontroller (16) is connected to the output terminal of the comparator (9). The transceiver terminal of the microcontroller (16) is connected to the transceiver terminal of the wireless communication module (17).

10. The mobile generator set according to claim 1, characterized in that: The bottom of the protective box (1) is equipped with multiple casters (7).

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