High-frequency-response electric whistle signal unit device

Abstract

The utility model discloses a high-frequency-response electric whistle signal unit device, which comprises a main case, an auxiliary case is inserted into the top end of the main case, one end of the auxiliary case is in threaded connection with a high-frequency loudspeaker, a high-frequency piezoelectric ceramic piece is arranged in the high-frequency loudspeaker, and two ends of the high-frequency piezoelectric ceramic piece are connected with non-polar capacitors. A DDS chip is installed in the auxiliary machine shell, a hot plug connector is arranged below the DDS chip, a circuit board is installed in the main machine shell, and a hot plug interface matched with the hot plug connector is formed in the circuit board. When in use, the high-frequency piezoelectric ceramic piece is connected in parallel with the high-frequency loudspeaker at the signal input end, and the high-frequency piezoelectric ceramic piece and the high-frequency loudspeaker can form a broadband composite sounding structure by utilizing the characteristic of ultrahigh-frequency response of the high-frequency piezoelectric ceramic piece, so that the enhancement of high-frequency overtone components, the improvement of sound penetrating power and the enhancement of signal identification degree are facilitated.

Description

Technical Field

[0001] This utility model relates to the technical field of electric whistle signal unit devices, specifically a high-frequency electric whistle signal unit device. Background Technology

[0002] An electric whistle signal unit is a device that uses electrical signals to drive a sound-generating component to produce a sound signal of a specific frequency. It is mainly used in industrial alarms, ship signals, and safety warnings. It transmits warning information through high-frequency or low-frequency sounds and has the characteristics of fast response speed, controllable volume, and stable signal. However, there are still some shortcomings in the use of current electric whistle signal unit devices.

[0003] Electric whistle signal unit devices often employ low-frequency designs, resulting in insufficient high-frequency response. In noisy environments, they are easily masked by background noise and have low visibility. Furthermore, existing devices of this type are often integrated structures with various modular components assembled inside the housing, making it difficult to achieve flexible maintenance and repair through modular design. Based on this, we propose a novel high-frequency electric whistle signal unit device. Utility Model Content

[0004] The purpose of this invention is to provide a high-frequency electric whistle signal unit device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-frequency electric whistle signal unit device, comprising a main housing, a secondary housing inserted into the top of the main housing, a high-frequency speaker threadedly connected to one end of the secondary housing, a high-frequency piezoelectric ceramic plate installed inside the high-frequency speaker, and non-polarized capacitors connected to both ends of the high-frequency piezoelectric ceramic plate, a DDS chip installed inside the secondary housing, a hot-swappable connector provided below the DDS chip, a circuit board installed inside the main housing, a hot-swappable interface matching the hot-swappable connector provided on the circuit board, a microcontroller, a Class D high-frequency power amplifier, a power conversion circuit and a filter sequentially installed on one side of the circuit board, and a backup battery installed on the other side of the circuit board.

[0006] Preferably, one end of the high-frequency loudspeaker is provided with an external pre-reserved insertion tube, and the interior of the sub-casing is provided with an internal fixed insertion tube that matches the external pre-reserved insertion tube.

[0007] Preferably, the inner wall of the internal fixation cannula is provided with an internal thread layer, and the outer wall of the external reserved cannula is provided with an external thread layer that matches the internal thread layer.

[0008] Preferably, thermally conductive silicone grease is used to fill the space between the circuit board and the backup battery and the main unit casing.

[0009] Preferably, a lower mounting plate is provided at the middle position on both sides of the bottom of the main unit housing. The lower mounting plate is provided with screw holes, which makes it easy to fix the main unit housing in a suitable operating position by screws and improves stability.

[0010] Preferably, mounting side plates are provided on both sides of the top of the main unit housing.

[0011] Preferably, the mounting side plate is provided with a positioning slide groove, and both sides of the sub-housing are provided with positioning slide bars that are slidably connected to the positioning slide groove. Screws are provided between the mounting side plate and the positioning slide bars.

[0012] Preferably, the main housing, the secondary housing, and the high-frequency speaker are all provided with a high-frequency insulating sealant layer to avoid interference caused by electromagnetic shielding.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) The high-frequency electric whistle signal unit device optimizes its performance by installing high-frequency piezoelectric ceramic plates, etc. On the one hand, by using a DDS chip to replace the signal generation module in the traditional electric whistle, it can replace the common low-frequency analog signal generation function with wideband signal generation, and can accurately output high-frequency sine waves, square waves, etc., which can meet the high-frequency warning needs in complex environments. Then, the signal is filtered by a filter to remove noise and ensure the purity of the output signal. Next, a Class D high-frequency power amplifier that replaces the traditional power amplifier components supports signal amplification above 20kHz without attenuation, avoiding the cutoff loss of high-frequency signals by low-frequency power amplifiers. Finally, the processed signal drives the high-frequency speaker, which enables the device to achieve a better high-frequency response function and effectively solves the problems of insufficient high-frequency response, easy masking by background noise and low recognition caused by the low-frequency design of traditional electric whistles. On the other hand, by connecting a high-frequency piezoelectric ceramic plate in parallel with the high-frequency speaker at the signal input end, the ultra-high frequency response characteristics of the high-frequency piezoelectric ceramic plate can be used to form a wideband composite sound generation structure with the high-frequency speaker, which is conducive to enhancing the high-frequency overtone components, improving the sound penetration and strengthening the signal recognition.

[0015] (2) The high-frequency electric whistle signal unit device is equipped with a sub-casing, which allows the device to be used in a modular assembly structure consisting of a main casing and a sub-casing that integrate different components. The sub-casing, which integrates a DDS chip and a high-frequency speaker, is connected to the main casing, which has a built-in circuit board, by means of hot-swappable connectors and hot-swappable interfaces. The easily damaged high-frequency components, namely the sub-casing that integrates a DDS chip and a high-frequency speaker, can be independently disassembled and replaced. When the high-frequency components are removed, the main casing does not need to be powered off. This allows the device to be used outdoors and can be replaced at any time by carrying multiple high-frequency components, thereby improving the stability of the device during operation.

[0016] (3) The high-frequency electric whistle signal unit device optimizes its structure by setting positioning slide bars, etc. On the one hand, the user can use the sliding connection structure formed by the positioning slide bars and positioning grooves, along with the locking and fixing effect of screws, to position and assemble the sub-casing between the two mounting side plates on the top of the main casing. On the other hand, the user can use the threaded connection between the inner fixed tube and the outer reserved tube to disassemble and install the high-frequency speaker and the sub-casing, thus achieving the advantages of a split design and easy maintenance. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the rear view of the disassembled sub-casing of this utility model;

[0019] Figure 3 This is a partial cross-sectional view of the high-frequency loudspeaker of this utility model.

[0020] Figure 4 This is a top view sectional structural diagram of the present invention;

[0021] Figure 5 This is a front view cross-sectional structural diagram of the auxiliary housing of this utility model.

[0022] In the diagram: 1. Sub-casing; 2. Main casing; 3. High-frequency speaker; 4. Mounting side panel; 5. Positioning slide bar; 6. Hot-swappable connector; 7. External pre-installed tube; 8. High-frequency piezoelectric ceramic plate; 9. Non-polar capacitor; 10. Backup battery; 11. Microcontroller; 12. Class D high-frequency power amplifier; 13. Lower mounting plate; 14. Positioning slide bar; 15. Power conversion circuit; 16. Circuit board; 17. Hot-swappable interface; 18. Filter; 19. DDS chip; 20. Internal fixed tube. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Please see Figure 1-5 An embodiment of this utility model is provided: a high-frequency electric whistle signal unit device, including a main housing 2, a secondary housing 1 inserted into the top of the main housing 2, a high-frequency speaker 3 threadedly connected to one end of the secondary housing 1, a high-frequency piezoelectric ceramic sheet 8 installed inside the high-frequency speaker 3, and non-polarized capacitors 9 connected to both ends of the high-frequency piezoelectric ceramic sheet 8.

[0025] The DDS chip 19 is installed inside the secondary housing 1, and a hot-swappable connector 6 is provided below the DDS chip 19. The circuit board 16 is installed inside the main housing 2, and a hot-swappable interface 17 matching the hot-swappable connector 6 is provided on the circuit board 16.

[0026] In use, the device is configured as a modular assembly structure consisting of a main housing 2 and a secondary housing 1 that integrate different components. The secondary housing 1, which integrates a DDS chip 19 and a high-frequency speaker 3, is connected to the main housing 2, which has a built-in circuit board 16, via a hot-swappable connector 6 and a hot-swappable interface 17. The easily damaged high-frequency components, namely the secondary housing 1 which integrates the DDS chip 19 and the high-frequency speaker 3, can be independently disassembled and replaced. When the high-frequency components are removed, the main housing 2 does not need to be powered off. This allows the device to be used outdoors and can be replaced at any time by carrying multiple high-frequency components, thereby improving the stability of the device during operation.

[0027] A microcontroller 11, a Class D high-frequency power amplifier 12, a power conversion circuit 15 and a filter 18 are sequentially mounted on one side of the circuit board 16, and a spare battery 10 is mounted on the other side of the circuit board 16.

[0028] In use, by using the DDS chip 19 to replace the signal generation module in the traditional electric horn, the common low-frequency analog signal generation function can be replaced by wideband signal generation. It can accurately output high-frequency sine waves, square waves, etc., which can meet the high-frequency warning needs in complex environments. Then, the signal is filtered by the filter 18 to remove noise and ensure the purity of the output signal. Next, the Class D high-frequency power amplifier 12, which replaces the traditional power amplifier components, supports attenuation-free amplification of signals above 20kHz, avoiding the cutoff loss of high-frequency signals by the low-frequency power amplifier. Finally, the processed signal drives the high-frequency speaker 3. This enables the device to achieve a better high-frequency response function and effectively solves the problems of insufficient high-frequency response, easy masking by background noise in noisy environments, and low recognition caused by the low-frequency design of traditional electric horns.

[0029] One end of the high-frequency loudspeaker 3 is provided with an external reserved insertion tube 7, and the interior of the sub-housing housing 1 is provided with an internal fixed insertion tube 20 that matches the external reserved insertion tube 7;

[0030] The inner wall of the internal fixation cannula 20 is provided with an internal thread layer, and the outer wall of the external reserved cannula 7 is provided with an external thread layer that matches the internal thread layer.

[0031] Thermal grease is filled between the circuit board 16 and the backup battery 10 and the main unit casing 2.

[0032] When in use, the device can be connected to an external power source, and the power conversion circuit 15 converts the external power source into the voltage required by each module. Alternatively, the backup battery 10 can be used as an energy storage element to facilitate flexible power supply, which enhances the practicality of the device.

[0033] The bottom of the main unit housing 2 is provided with a lower mounting plate 13 at the middle position on both sides. The lower mounting plate 13 is provided with screw holes, which makes it easy to pass screws to fix the main unit housing 2 in a suitable operating position and improves stability.

[0034] Mounting side plates 4 are provided on both sides of the top of the main unit casing 2;

[0035] The mounting side plate 4 is provided with a positioning slide groove 14, and both sides of the auxiliary housing 1 are provided with positioning slide bars 5 that are slidably connected to the positioning slide groove 14. Screws are provided between the mounting side plate 4 and the positioning slide bars 5.

[0036] In use, the user can use the sliding connection structure formed by the positioning slide bar 5 and the positioning slide groove 14, along with the locking and fixing effect of the screws, to position and assemble the auxiliary housing 1 between the two mounting side plates 4 on the top of the main housing 2. This makes the device achieve the advantages of a split design and facilitate maintenance.

[0037] The main housing 2, the secondary housing 1, and the high-frequency speaker 3 are all equipped with a high-frequency insulating sealant layer to prevent interference caused by electromagnetic shielding.

[0038] In this embodiment, the device is configured as a modular assembly structure consisting of a main housing 2 and a sub-housing housing 1 integrating different components. The sub-housing housing 1, which integrates the DDS chip 19 and the high-frequency speaker 3, is connected to the main housing 2, which contains the circuit board 16, via a hot-swappable connector 6 and a hot-swappable interface 17. The easily damaged high-frequency components, namely the sub-housing housing 1 integrating the DDS chip 19 and the high-frequency speaker 3, can be independently disassembled and replaced. When the high-frequency components are removed, the main housing 2 does not need to be powered off. This allows the device to be used outdoors, with multiple high-frequency components that can be easily replaced, improving the stability of the device during operation. Specifically, by using the DDS chip 19 to replace the signal generation module in a traditional electric whistle, the common low-frequency analog signal generation function can be replaced by wideband signal generation, accurately outputting high-frequency sine waves, square waves, etc., facilitating... To meet the high-frequency warning requirements in complex environments, the signal is filtered by filter 18 to remove noise and ensure a pure output signal. Then, a Class D high-frequency power amplifier 12, which replaces the traditional power amplifier components, supports attenuation-free amplification of signals above 20kHz, avoiding the cutoff loss of high-frequency signals by the low-frequency power amplifier. Finally, the processed signal drives the high-frequency speaker 3, which enables the device to achieve a better high-frequency response function. This effectively solves the problems of insufficient high-frequency response, easy masking by background noise in noisy environments, and low recognition caused by the low-frequency design of traditional electric whistles. At the same time, by connecting a high-frequency piezoelectric ceramic plate 8 in parallel with the high-frequency speaker 3 at the signal input end, the ultra-high frequency response characteristics of the high-frequency piezoelectric ceramic plate 8 can form a wide-band composite sound structure with the high-frequency speaker 3, which is conducive to enhancing high-frequency overtone components, improving sound penetration, and strengthening signal recognition.

Claims

1. A high-frequency electric whistle signal unit device, characterized in that, The system includes a main housing (2), a secondary housing (1) is inserted into the top of the main housing (2), a high-frequency speaker (3) is threaded to one end of the secondary housing (1), a high-frequency piezoelectric ceramic plate (8) is installed inside the high-frequency speaker (3), and a non-polar capacitor (9) is connected to both ends of the high-frequency piezoelectric ceramic plate (8). A DDS chip (19) is installed inside the secondary housing (1), and a hot-swappable connector (6) is provided below the DDS chip (19). A circuit board (16) is installed inside the main housing (2), and a hot-swappable interface (17) matching the hot-swappable connector (6) is provided on the circuit board (16). A microcontroller (11), a Class D high-frequency power amplifier (12), a power conversion circuit (15) and a filter (18) are installed in sequence on one side of the circuit board (16), and a spare battery (10) is installed on the other side of the circuit board (16).

2. The high-frequency electric whistle signal unit device according to claim 1, characterized in that: One end of the high-frequency loudspeaker (3) is provided with an external reserved insertion tube (7), and the interior of the sub-casing (1) is provided with an internal fixed insertion tube (20) that matches the external reserved insertion tube (7).

3. The high-frequency electric whistle signal unit device according to claim 2, characterized in that: The inner wall of the internal fixation cannula (20) is provided with an internal thread layer, and the outer wall of the external reserved cannula (7) is provided with an external thread layer that matches the internal thread layer.

4. The high-frequency electric whistle signal unit device according to claim 1, characterized in that: The circuit board (16) and the backup battery (10) are both filled with thermally conductive silicone grease between themselves and the main housing (2).

5. The high-frequency electric whistle signal unit device according to claim 1, characterized in that: The bottom of the main housing (2) is provided with a lower mounting plate (13) at the middle position on both sides, and the lower mounting plate (13) is provided with a screw hole.

6. The high-frequency electric whistle signal unit device according to claim 1, characterized in that: The main housing (2) has mounting side plates (4) on both sides of the top.

7. The high-frequency electric whistle signal unit device according to claim 6, characterized in that: The mounting side plate (4) is provided with a positioning slide groove (14), and both sides of the auxiliary housing (1) are provided with positioning slide bars (5) that are slidably connected to the positioning slide groove (14). Screws are provided between the mounting side plate (4) and the positioning slide bars (5).

8. The high-frequency electric whistle signal unit device according to claim 1, characterized in that: The main housing (2), the secondary housing (1), and the high-frequency speaker (3) are all provided with a high-frequency insulating sealant layer.

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