An embedded marine alarm control circuit

Abstract

The utility model relates to the technical field of marine electronic equipment, concretely is a kind of embedded marine alarm control circuit, including light control trigger circuit, the output end of light control trigger circuit and the trigger end electric connection of integrated circuit IC, the oscillation output end of integrated circuit IC and the input end electric connection of acousto-optic drive circuit, light control trigger circuit and acousto-optic drive circuit are electrically connected with power supply circuit;Acousto-optic drive circuit includes bulb Lx2, the first end of bulb Lx2 and the emitter electrode electric connection of triode VT2, the second end of bulb Lx2 and the first end electric connection of resistance R4, the second end of resistance R4 is grounded;In the utility model, acousto-optic drive circuit adopts bulb Lx2 and resistance R4 series branch, and the branch formed by resistance R3 is parallelly connected with the design of loudspeaker BL, make light, sound signal independent output and do not interfere with each other, avoid single component failure to cause alarm failure, adapt the high reliability demand of marine navigation.

Description

Technical Field

[0001] This utility model relates to an embedded marine alarm control circuit, belonging to the field of marine electronic equipment technology. Background Technology

[0002] The embedded marine alarm control circuit is based on the HL-169B dedicated alarm sound chip, with 8050 / 9015 forming a complementary push-pull output stage, VTI terminal for external TTL triggering or shutdown, and SV terminal for piezoelectric ceramic plate voltage sampling. It has all the elements required by classification societies, such as 24V marine power input, reverse power protection, overvoltage clamping, temperature compensation, adjustable volume, and oscillator self-test, and can be directly installed into marine fire, fault, and general alarm terminals. Marine alarms are exposed to rough seas and salt spray corrosion for extended periods, which can cause the horn diaphragm to age and deform, and the voice coil to lose more power, resulting in reduced sound output efficiency. In low-temperature navigation scenarios, frost can easily condense between the horn voice coil and the diaphragm, creating physical obstruction and further weakening the diaphragm's vibration amplitude. The combined effect of these factors causes the actual sound pressure of the horn to be lower than the marine alarm standard. Even if components such as transistor VT2 and resistor R3 in the sound and light drive circuit are driven normally, the horn cannot output a sufficient warning volume. Therefore, it is urgent to improve the control circuit of the embedded marine alarm to solve the above-mentioned problems. Utility Model Content

[0003] The purpose of this utility model is to provide an embedded marine alarm control circuit. The sound and light drive circuit is the core output module of the embedded marine alarm. It adopts a series branch of bulb Lx2 and resistor R4, and a parallel design with the branch formed by the speaker BL through resistor R3. This design allows the light and sound signals to be output independently and without interference, avoiding alarm failure due to the failure of a single component, and meeting the high reliability requirements of ship navigation.

[0004] To achieve the above objectives, the main technical solutions adopted by this utility model include: An embedded marine alarm control circuit includes a light-controlled trigger circuit, the output terminal of which is electrically connected to the trigger terminal of an integrated circuit IC, the oscillation output terminal of which is electrically connected to the input terminal of an acoustic-optical drive circuit, and both the light-controlled trigger circuit and the acoustic-optical drive circuit are electrically connected to a power supply circuit. The sound and light driving circuit includes a bulb Lx2, the first end of the bulb Lx2 is electrically connected to the emitter of the transistor VT2, the second end of the bulb Lx2 is electrically connected to the first end of the resistor R4, and the second end of the resistor R4 is grounded; The base of transistor VT2 is electrically connected to the oscillation output terminal of integrated circuit IC, and the collector of transistor VT2 is electrically connected to speaker BL and resistor R3.

[0005] Preferably, the light-controlled trigger circuit includes a phototransistor VTL, resistors R1 and R2, capacitor C1, transistor VT1, and potentiometer RP. The collector of the phototransistor VTL is electrically connected to the first end of resistor R1 and one end of potentiometer RP, and the emitter of the phototransistor VTL is grounded.

[0006] Preferably, the second end of the resistor R1 is electrically connected to the power supply circuit, the other end of the potentiometer RP is electrically connected to the first end of the resistor R2, and the second end of the resistor R2 is electrically connected to the base of the transistor VT1.

[0007] Preferably, the emitter of the transistor VT1 is electrically connected to the power supply circuit, the collector of the transistor VT1 is electrically connected to the first terminal of the capacitor C1 and the trigger terminal of the integrated circuit IC, and the second terminal of the capacitor C1 is grounded.

[0008] Preferably, the phototransistor VTL is a 3DU11 type phototransistor, the transistor VT1 is a 9015 type PNP transistor, the resistor R1 has a resistance of 100kΩ, the resistor R2 has a resistance of 10kΩ, and the capacitor C1 has a capacitance of 0.1μF.

[0009] Preferably, the branch formed by the bulb Lx2 and the resistor R4 connected in series, and the branch formed by the speaker BL and the resistor R3, are connected in parallel between the collector and emitter of the transistor VT2.

[0010] Preferably, the connection between the base of the transistor VT2 and the oscillation output terminal of the integrated circuit IC is independent of the connection between the light-controlled trigger circuit and the trigger terminal of the integrated circuit IC.

[0011] This utility model has at least the following beneficial effects: 1. The sound and light drive circuit, as the core output module of the embedded marine alarm, adopts a series branch of bulb Lx2 and resistor R4, and a parallel design with the branch formed by the speaker BL through resistor R3. This design allows the light and sound signals to be output independently and without interference, avoiding alarm failure due to the failure of a single component. It is suitable for the high reliability requirements of ship navigation. The transistor VT2 serves as the core driver, with a fast switching response. It can accurately amplify the pulse signal output by the integrated circuit, realize strict synchronization between light flashing and sound alarm, and form a sound and light linkage effect with strong penetration. It can still effectively transmit warning information in low visibility environments such as fog and rain. 2. The current-limiting protection design of resistors R3 and R4 can prevent the horn and bulb from being damaged by overcurrent due to voltage fluctuations in the ship's power grid. Combined with the selection of vibration-resistant components, it can adapt to the harsh environment of shipboard turbulence and drastic temperature and humidity changes. At the same time, the low power consumption characteristics are suitable for shipboard battery power supply scenarios, and the power consumption is balanced between standby and working states, ensuring reliable operation for a long time. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a circuit diagram of the embedded marine alarm control circuit of this utility model.

[0013] In the diagram, 1 is the light-controlled trigger circuit; 2 is the sound and light drive circuit. Detailed Implementation

[0014] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0015] like Figure 1 As shown, this embodiment provides an embedded marine alarm control circuit, including a light-controlled trigger circuit 1. The output terminal of the light-controlled trigger circuit 1 is electrically connected to the trigger terminal of an integrated circuit IC. The oscillation output terminal of the integrated circuit IC is electrically connected to the input terminal of a sound and light driving circuit 2. Both the light-controlled trigger circuit 1 and the sound and light driving circuit 2 are electrically connected to a power supply circuit. The sound and light driving circuit 2 includes a bulb Lx2. The first terminal of the bulb Lx2 is electrically connected to the emitter of a transistor VT2, and the second terminal of the bulb Lx2 is electrically connected to the first terminal of a resistor R4, which is grounded. The base of the transistor VT2 is electrically connected to the oscillation output terminal of the integrated circuit IC, and the collector of the transistor VT2 is electrically connected to a speaker BL and a resistor R3. The light-controlled trigger circuit 1 receives external light signals, which are then relayed through the integrated circuit IC to control the sound and light driving circuit 2. This allows for automatic response to changes in the external light environment without manual intervention, improving the circuit's intelligence and convenience. By sharing power and interacting with signals, the circuit works collaboratively, simplifying the circuit structure and reducing the overall size and cost.

[0016] The light-controlled trigger circuit 1 includes a phototransistor VTL, resistors R1 and R2, capacitor C1, transistor VT1, and potentiometer RP. The collector of the phototransistor VTL is electrically connected to the first end of resistor R1 and one end of potentiometer RP. The emitter of the phototransistor VTL is grounded. A 3DU11 type phototransistor VTL is used, which has high sensitivity and good linearity to light signals and can accurately sense changes in external light intensity. Combined with the switching characteristics of the 9015 type PNP transistor VT1, it can convert weak light signals into stable electrical trigger signals, ensuring that the circuit can be reliably triggered in different light environments.

[0017] The second end of resistor R1 is electrically connected to the power supply circuit. The other end of potentiometer RP is electrically connected to the first end of resistor R2. The second end of resistor R2 is electrically connected to the base of transistor VT1. The emitter of transistor VT1 is electrically connected to the power supply circuit. The collector of transistor VT1 is electrically connected to the first end of capacitor C1 and the trigger terminal of integrated circuit IC. The second end of capacitor C1 is grounded. The phototransistor VTL is a 3DU11 type phototransistor, and transistor VT1 is a 9015 type PNP transistor. The resistance of resistor R1 is 100kΩ, the resistance of resistor R2 is 10kΩ, and the capacitance of capacitor C1 is 0.1μF. This limits the operating current of the phototransistor and eliminates noise interference through filtering by capacitor C1, making the signal input to the trigger terminal of integrated circuit IC more stable and reducing false triggering.

[0018] Furthermore, such as Figure 1 As shown, the branch formed by the bulb Lx2 and resistor R4 connected in series, and the branch formed by the speaker BL and resistor R3, are connected in parallel between the collector and emitter of transistor VT2. The connection between the base of transistor VT2 and the oscillation output terminal of integrated circuit IC is independent of the connection between the light-controlled trigger circuit 1 and the trigger terminal of integrated circuit IC, so that the light signal and the sound signal can work synchronously based on the same driving signal to achieve the effect of "sound and light linkage". At the same time, the independent circuit design of the two branches avoids mutual interference of the working current of the light and sound components, ensuring output stability. Resistors R3 and R4 provide current limiting protection for the speaker BL and bulb Lx2, respectively, to prevent the components from being damaged by overcurrent and extend the service life of the circuit. The connection between the light-controlled trigger circuit 1 and the trigger terminal of the integrated circuit IC, and the connection between the sound and light drive circuit 2 and the oscillation output terminal of the integrated circuit IC, are independent parallel paths, which avoids crosstalk between the trigger signal and the drive signal. At the same time, the setting of capacitors C1 and C3 further suppresses power supply noise and signal noise, and improves the anti-interference ability and working reliability of the circuit.

[0019] Workflow: Upon closing the power switch SA, the marine 4.5V DC power supply is transmitted to the entire circuit via the line. The filter capacitor C3 in the power circuit filters the input voltage, eliminating potential noise interference from the ship's electrical grid and providing a stable DC voltage to each module. The light-controlled trigger circuit 1, integrated circuit IC, and sound-and-light drive circuit 2 are all powered on and enter standby mode. At this time, the phototransistor VTL of the light-controlled trigger circuit 1 monitors the ambient light intensity around the ship in real time. The integrated circuit IC is not triggered, and the bulb Lx2 and speaker BL of the sound-and-light drive circuit 2 are in the off state. When abnormal light signals appear around the ship, the light intensity received by the phototransistor VTL exceeds a preset threshold. After being illuminated, the on-resistance of VTL decreases, and its collector potential drops. After being divided by resistor R1, the voltage signal output by potentiometer RP is transmitted to resistor R2. This signal triggers transistor VT1 to conduct, and its collector potential jumps from low to high. The high-level signal from the collector of transistor VT1 is filtered by capacitor C1 and then input to the trigger terminal of integrated circuit IC, activating IC operation. Once triggered, IC outputs a preset alarm audio signal at its oscillation output terminal. This signal is a pulsed electrical signal with a frequency matching the alarm tone rhythm. The audio signal is input to the sound and light driving circuit. The base of transistor VT2 controls its alternating conduction and cutoff. Current flows from the positive terminal of the power supply through the collector of VT2 → resistor R3 → speaker BL → ground, causing speaker BL to emit an alarm sound synchronized with the audio signal. Simultaneously, current flows through the emitter of VT2 → bulb Lx2 → resistor R4 → ground, causing bulb Lx2 to flash synchronously. Both speaker BL and bulb Lx2 stop working, creating an alternating sound and light pulse alarm effect, which meets the high recognition requirements of ship alarm signals. The series branch of bulb Lx2 and resistor R4, and the series branch of speaker BL and resistor R3, form a parallel relationship between the collector and emitter of VT2, ensuring that the sound and light signals are output independently and do not interfere with each other, avoiding alarm failure due to the failure of a single component. When the abnormal light signal disappears, the phototransistor VTL returns to the cutoff state, the transistor VT1 is cut off, the trigger signal of the integrated circuit IC is interrupted, and the output drive signal stops after about 1-2 seconds. The audible and visual alarm stops automatically, and the circuit returns to the standby state, waiting for the next trigger.

[0020] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0021] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0022] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An embedded marine alarm control circuit, comprising a light-controlled trigger circuit (1), characterized in that, It also includes an acoustic-optical driving circuit (2), the output terminal of the light-controlled trigger circuit (1) is electrically connected to the trigger terminal of the integrated circuit IC, the oscillation output terminal of the integrated circuit IC is electrically connected to the input terminal of the acoustic-optical driving circuit (2), and both the light-controlled trigger circuit (1) and the acoustic-optical driving circuit (2) are electrically connected to the power supply circuit. The sound and light driving circuit (2) includes a bulb Lx2, the first end of the bulb Lx2 is electrically connected to the emitter of the transistor VT2, the second end of the bulb Lx2 is electrically connected to the first end of the resistor R4, and the second end of the resistor R4 is grounded; The base of transistor VT2 is electrically connected to the oscillation output terminal of integrated circuit IC, and the collector of transistor VT2 is electrically connected to speaker BL and resistor R3.

2. The embedded marine alarm control circuit according to claim 1, characterized in that: The light-controlled trigger circuit (1) includes a phototransistor VTL, resistors R1 and R2, capacitor C1, transistor VT1 and potentiometer RP. The collector of the phototransistor VTL is electrically connected to the first end of resistor R1 and one end of potentiometer RP, and the emitter of the phototransistor VTL is grounded.

3. The embedded marine alarm control circuit according to claim 2, characterized in that: The second end of the resistor R1 is electrically connected to the power supply circuit, the other end of the potentiometer RP is electrically connected to the first end of the resistor R2, and the second end of the resistor R2 is electrically connected to the base of the transistor VT1.

4. The embedded marine alarm control circuit according to claim 1, characterized in that: The emitter of the transistor VT1 is electrically connected to the power supply circuit, the collector of the transistor VT1 is electrically connected to the first terminal of the capacitor C1 and the trigger terminal of the integrated circuit IC, and the second terminal of the capacitor C1 is grounded.

5. The embedded marine alarm control circuit according to claim 2, characterized in that: The phototransistor VTL is a 3DU11 type phototransistor, the transistor VT1 is a 9015 type PNP transistor, the resistor R1 has a resistance of 100kΩ, the resistor R2 has a resistance of 10kΩ, and the capacitor C1 has a capacitance of 0.1μF.

6. The embedded marine alarm control circuit according to claim 1, characterized in that: The branch formed by the bulb Lx2 and resistor R4 connected in series, and the branch formed by the speaker BL and resistor R3, are connected in parallel between the collector and emitter of transistor VT2.

7. The embedded marine alarm control circuit according to claim 1, characterized in that: The connection between the base of the transistor VT2 and the oscillation output terminal of the integrated circuit IC is independent of the connection between the light-controlled trigger circuit (1) and the trigger terminal of the integrated circuit IC.

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