Noise monitoring device

Abstract

A noise monitoring device comprises a power supply module, a noise detection module, a temperature sensor, an outer shell, a time delay circuit, an alarm circuit and a detection circuit, the power supply module, the noise detection module, the temperature sensor, the time delay circuit, the alarm circuit and the detection circuit are installed in the outer shell and connected through wires, a magnet plate is fixedly installed on the rear outer side of the outer shell, and the outer shell is installed in the distribution box through attraction of the magnet plate. The outer shell is installed at a proper position in the distribution box through attraction of the magnet, the noise detection module, the time delay circuit, the detection circuit, the temperature sensor and the like can cooperatively detect temperature data and noise data in the distribution box body, and when the temperature data exceeds the standard and the noise exceeds the standard continuously for a certain time, a signal can be output to the alarm circuit, so that the alarm circuit gives an alarm. Therefore, the alarm of the alarm circuit can give out loud alarm sound to prompt a worker to carry out maintenance in time, and stable and reliable work of electrical components and electrical loads in the distribution box is ensured as far as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a noise monitoring device. Background Art

[0002] The organization that supplies power to electrical equipment in the relevant area. Due to various reasons, the distribution box may generate excessive internal noise (such as overload, missing or poor contact of fuses, incomplete power cord insertion, damaged cooling fans, loose coils in the isolation transformer, etc., which can cause the distribution box to emit noise such as buzzing) and excessive temperature rise (such as excessive load or short circuit in electrical equipment, causing internal electrical components to overheat or burn out). These factors can adversely affect the operation of the internal electrical components and the safe and stable operation of the electrical equipment.

[0003] Since the noise data and temperature data of the distribution box are directly related to its safe working conditions, when the noise emitted in the distribution box is relatively loud and the temperature is relatively high due to various reasons, targeted processing can be carried out in the first time, which will undoubtedly play an effective technical support role in the safe and stable operation of the distribution box. However, due to structural limitations, the existing distribution box does not have the function of timely alarming and reminding relevant staff when the internal noise or temperature rise is too high. Relying on relevant staff to manually detect noise and temperature data will not only bring inconvenience to the staff, but also make it impossible for the staff to detect the noise or temperature data in real time, so it is impossible to ensure the stable and reliable operation of the distribution box. In summary, it is particularly necessary to provide a device that can monitor the noise and temperature data inside the distribution box in real time, and can remind relevant management personnel when the data is abnormal. Utility Model Content

[0004] In order to overcome the drawbacks of existing distribution boxes, etc., which are caused by the lack of a suitable noise and temperature monitoring device, as described in the background technology, the utility model provides a noise monitoring device that is mainly used for distribution boxes, etc., and can monitor the temperature data and noise data of various electrical components in the distribution box in real time during application. When the temperature and noise data exceed the threshold, an alarm can be issued in real time to prompt the staff to carry out maintenance in time, thereby ensuring that the electrical components and power loads in the distribution box can work stably and reliably as much as possible.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A noise monitoring device includes a power supply module, a noise detection module, a temperature sensor, and an outer shell, and is characterized in that it also has a delay circuit, an alarm circuit, and a detection circuit; the power supply module, noise detection module, temperature sensor, delay circuit, alarm circuit, and detection circuit are installed in the outer shell, a magnet plate is fixedly installed on the rear outer side of the outer shell, and the outer shell is installed inside the distribution box through the magnet plate; the power output end of the power supply module is electrically connected to the power input end of the noise detection module, temperature sensor, alarm circuit, detection circuit, and delay circuit; the signal input end of the detection circuit is electrically connected to the signal output end of the noise detection module, the signal output end of the detection circuit is electrically connected to the signal input end of the delay circuit, and the signal output end of the delay circuit and the temperature sensor is electrically connected to the signal input end of the alarm circuit.

[0007] Furthermore, the temperature sensor is a snap-type normally open contact temperature switch.

[0008] Furthermore, the detection circuit includes electrically connected resistors and transistors, one end of the first resistor is connected to one end of the second resistor and the base of the first transistor, the collector of the first transistor is connected to the base of the second transistor, and the other end of the second resistor is connected to the emitter of the first transistor.

[0009] Furthermore, the delay circuit includes an electrically connected resistor, a capacitor, and a transistor, one end of the first resistor is connected to one end of the second resistor and the positive electrode of the capacitor, the other end of the second resistor is connected to the base of the first transistor, the collector of the first transistor is connected to the base of the second transistor, and the negative electrode of the capacitor is connected to the emitter of the first transistor.

[0010] Furthermore, the alarm circuit includes an electrically connected resistor, a thyristor, and an alarm, the thyristor cathode is connected to the positive power input end of the alarm, one end of the resistor is connected to the thyristor control electrode, and the thyristor cathode is connected to the positive power input end of the alarm.

[0011] Compared with the existing technology, the present invention has the following advantages: the outer shell is mounted in a suitable position within the distribution box via magnetic attraction. The noise detection module, delay circuit, detection circuit, and temperature sensor can collaboratively detect temperature and noise data within the distribution box. When the temperature data exceeds the standard or the noise exceeds the standard for a continuous period of time, a signal can be output to the alarm circuit. The alarm circuit then emits a loud alarm to prompt staff to conduct timely maintenance, thus ensuring that the electrical components and power loads within the distribution box can operate stably and reliably. In summary, the present invention has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0015] Figure 1 、 2 As shown in the figure, a noise monitoring device includes a power module T1, a noise detection module T2, a temperature sensor W, an outer shell 1, and also has a delay circuit 2, an alarm circuit 3, and a detection circuit 4; the power module T1, noise detection module T2, temperature sensor W, delay circuit 2, alarm circuit 3, and detection circuit 4 are mounted on a circuit board inside the outer shell 1, and a permanent magnet plate 101 is glued to the rear outer side of the outer shell 1. The outer shell 1 is mounted inside a distribution box (not shown) by magnet attraction.

[0016] Figure 1 、 2 As shown in FIG, temperature sensor W is a finished product, a model KSD301 snap-action normally open contact temperature switch. The detection head of noise detection module T2 and the temperature sensing surface of temperature sensor W are located outside the two openings at the front end of outer housing 1. The detection circuit includes resistors R3 and R4, and transistors Q3 and Q4, which are connected via circuit board wiring. One end of the first resistor R3 is connected to one end of the second resistor R4 and the base of the first transistor Q3. The collector of the first transistor Q3 is connected to the base of the second transistor Q4. The other end of the second resistor R4 is connected to the emitter of the first transistor Q3. The delay circuit includes resistors R1 and R2, capacitor C1, and transistors Q1 and Q2, all connected via circuit board wiring. One end of the first resistor R1 is connected to one end of the second resistor R2 and the positive electrode of capacitor C1. The other end of the second resistor R2 is connected to the base of the first transistor Q1, the collector of the first transistor Q1 is connected to the base of the second transistor Q2, and the negative electrode of capacitor C1 is connected to the emitter of the first transistor Q1. The alarm circuit includes resistor R5, a thyristor (SCR) and an alarm device BX, all connected via circuit board wiring. The cathode of the thyristor (SCR) is connected to the positive power input of the alarm device BX. One end of the resistor R5 is connected to the control electrode of the thyristor (SCR) and the cathode of the thyristor (SCR) is connected to the positive power input of the alarm device BX.

[0017] Figure 1 、 2As shown in FIG, power input terminals 1 and 2 of power module T1 are connected to the two poles of the 220V power supply in the distribution box via wires. Power output terminals 3 and 4 of power module T1 are connected to power input terminals 1 and 2 of noise detection module T2, one end of temperature sensor W, the anode of thyristor VS, the negative power input terminal of alarm circuit, the emitter of transistor Q4 and transistor Q3, the emitter of transistor Q2 and the emitter of Q1, respectively, via wires. The other end of resistor R3, the signal input terminal of the detection circuit, is connected to signal output terminal 3 of noise detection module T2 via wires. The collector of transistor Q4 and the emitter of transistor Q3, the signal output terminal of the detection circuit, are connected to the other end of resistor R1, the signal input terminal of the delay circuit, and the negative electrode of capacitor C1, respectively, via wires. The collector of transistor Q2, the signal output terminal of the delay circuit, the other end of temperature sensor W, and the other end of resistor R5, the signal input terminal of the alarm circuit, are connected via wires. Figure 2 Transistors Q1 and Q3 are model 9013 (NPN). The resistance values ​​of resistors R1, R2, R3, R4, and R5 are 1.8M, 470K, 4.7K, 10K, and 10K, respectively. During production, a larger value for resistor R3 increases the voltage divided by it and resistor R4. This allows transistor Q3 to conduct when the noise level in the distribution box is relatively high, thus setting the noise threshold of this new design relatively high. A lower value for resistor R3 reduces the voltage divided by it and resistor R4, thus allowing transistor Q3 to conduct when the noise level in the distribution box is relatively low, thus setting the noise threshold of this new design relatively low. A larger value for resistor R1 increases the charging time of capacitor C1, and vice versa. Capacitor C1 is a 10μF / 25V electrolytic capacitor. Transistors Q2 and Q4 are model 9012 (PNP). The thyristor VS is a plastic-encapsulated single-phase thyristor model MCR100-1. The alarm BX is an active continuous buzzer alarm with a DC operating voltage of 12V. The noise detection module T2 is a finished noise sensor model XM8765. It has two power inputs and a signal output. When a noise signal is detected, the signal output outputs a dynamically changing 0-10V voltage signal. The power supply module T1 is a finished switching power supply module that converts a 220V AC power supply to a 12V DC power supply.

[0018] Figure 1 、 2As shown in FIG, the outer shell 1 of the novel device is mounted in a suitable position within the distribution box by magnet 101. After 220V AC power enters the power input of power module T1, pins 3 and 4 of power module T1 output a stable 12V DC power supply, which is then fed into the power input of noise detection module T2, temperature sensor W, alarm circuit, detection circuit, and delay circuit. When noise detection module T2 is powered and operating, pin 3 does not output a voltage signal if there is no noise within the distribution box. However, when there is noise, pin 3 outputs a voltage signal. The louder the noise within the distribution box, the higher the voltage signal output from pin 3 of noise detection module T2, and vice versa. When the noise data in the distribution box is lower than the threshold value (for example, lower than 45 decibels. When the electrical components in the distribution box are working, a certain amount of noise data will normally be generated, such as the low-frequency noise generated when the transformer is working), the voltage signal output from pin 3 of the noise detection module T2 is divided by resistors R3 and R4 and enters the base of the transistor Q3, which is lower than 0.7V. The transistor Q3 will not be turned on, and the subsequent thyristor VS will not be triggered to turn on. When the noise data in the distribution box is higher than the threshold value (for example, higher than 45 decibels), the voltage signal output from pin 3 of the noise detection module T2 is divided by resistors R3 and R4 and enters the base of the transistor Q3, which is higher than 0.7V. The transistor Q3 will be turned on and the collector outputs a low level, which enters the base of the transistor Q4. The transistor Q4 is turned on and the collector outputs a high level, which is reduced and limited by resistor R1 to charge the capacitor C1. In the initial time period (for example, the time is less than 20 seconds), when the capacitor C1 is not fully charged, the voltage signal output by the transistor Q4 enters the base of the transistor Q1 through the resistors R1 and R2 with a voltage reduction and current limiting, which is lower than 0.7V. The transistors Q1 and Q2 will not be turned on, and the thyristor VS will not be triggered, and the alarm BX will not be energized and sound. After charging for a period of time (for example, the time is greater than 20 seconds), when the capacitor C1 is fully charged, the voltage signal output by the transistor Q4 enters the base of the transistor Q1 through the resistors R1 and R2 with a voltage reduction and current limiting, which is higher than 0.7V. The transistor Q1 is turned on, and the collector outputs a low level and enters the base of the transistor Q2. The transistor Q2 will be turned on, and the collector outputs a high level, which is triggered by the resistor R5 with a voltage reduction and current limiting, and the thyristor VS will be turned on. The alarm BX will then be energized and sound. Through the above, when the noise data in the distribution box exceeds the threshold for a certain period of time, the alarm BX will be powered and sound to remind nearby staff that the noise data or temperature data in the distribution box exceeds the threshold (the 20-second delay is mainly to prevent external noise data from causing false alarms, such as the sound of rain and thunder. Since the capacitor C1 is continuously charged for 20 seconds before the transistor Q1 is turned on, the electricity charged on the capacitor C1 when it was not fully charged last time will be quickly released. Thunder is generally impossible to last for 20 seconds, so the adverse effects of external noise on noise detection are minimized as much as possible).When temperature sensor W is energized and the temperature inside the distribution box is below 35°C (depending on the actual temperature control requirements, select a temperature sensor W with different temperature control options), the internal contacts of temperature sensor W will not close, preventing the thyristor VS from being triggered to conduct. However, when the temperature inside the distribution box exceeds 35°C, the internal contacts of temperature sensor W will close, causing the 12V power supply to trigger the thyristor VS to conduct through resistor R5, activating alarm BX. This ensures that if the temperature inside the distribution box exceeds the threshold for a certain period of time, alarm BX will activate and sound to alert nearby personnel that the temperature or noise inside the distribution box has exceeded the threshold. This alarm allows personnel to promptly conduct maintenance (opening the distribution box allows them to easily determine whether the temperature is too high or the noise is excessive), thus ensuring stable and reliable operation of the electrical components and loads within the distribution box.

[0019] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0020] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A noise monitoring device, comprising a power module, a noise detection module, a temperature sensor, and an outer shell, characterized in that: It also has a delay circuit, an alarm circuit, and a detection circuit; the power module, noise detection module, temperature sensor, delay circuit, alarm circuit, and detection circuit are installed in the outer shell, and a magnet plate is fixedly installed on the rear outer side of the outer shell, and the outer shell is installed inside the distribution box through the magnet plate; the power output end of the power module and the power input end of the noise detection module, temperature sensor, alarm circuit, detection circuit, and delay circuit are electrically connected; the signal input end of the detection circuit is electrically connected to the signal output end of the noise detection module, the signal output end of the detection circuit is electrically connected to the signal input end of the delay circuit, and the signal output end of the delay circuit and the temperature sensor is electrically connected to the signal input end of the alarm circuit.

2. A noise monitoring device according to claim 1, characterized in that: The temperature sensor is a snap-type normally open contact temperature switch.

3. A noise monitoring device according to claim 1, characterized in that: The detection circuit includes an electrically connected resistor and a transistor, wherein one end of the first resistor is connected to one end of the second resistor and the base of the first transistor, the collector of the first transistor is connected to the base of the second transistor, and the other end of the second resistor is connected to the emitter of the first transistor.

4. A noise monitoring device according to claim 1, characterized in that: The delay circuit includes an electrically connected resistor, a capacitor, and a transistor. One end of the first resistor is connected to one end of the second resistor and the positive electrode of the capacitor. The other end of the second resistor is connected to the base of the first transistor. The collector of the first transistor is connected to the base of the second transistor. The negative electrode of the capacitor is connected to the emitter of the first transistor.

5. The noise monitoring device according to claim 1, characterized in that: The alarm circuit includes an electrically connected resistor, a thyristor, and an alarm. The thyristor cathode is connected to the positive power input end of the alarm. One end of the resistor is connected to the thyristor control electrode. The thyristor cathode is connected to the positive power input end of the alarm.

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