CN211979031U - Automatic power-off alarm system of depth finder - Google Patents
Automatic power-off alarm system of depth finder Download PDFInfo
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- CN211979031U CN211979031U CN201922373700.6U CN201922373700U CN211979031U CN 211979031 U CN211979031 U CN 211979031U CN 201922373700 U CN201922373700 U CN 201922373700U CN 211979031 U CN211979031 U CN 211979031U
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Abstract
The utility model discloses a depth finder outage automatic alarm system, the 220V AC power supply power of the depth finder is connected in series with a resistor R1, a resistor R2, a resistor R3 and a resistor R4 through a diode D1 half-wave rectification to carry out voltage division; the base electrode of the triode T1 is connected with the resistor R2 and the resistor R3, the collector electrode of the triode T1 is connected with the grid electrode of the field effect tube T2, the source electrode of the field effect tube T2 is connected with the negative electrode of the battery BT1, the drain electrode of the field effect tube T2 is connected with the positive electrode of the battery BT1 through the buzzer BZ1, the collector electrode of the triode T1 is also connected with the positive electrode of the battery BT1 through the resistor R5, and the emitter electrode of the triode T1 is connected with the negative electrode of the battery BT 1. The resistor R3 is divided into small voltage to control the working states of the triode T1 and the field effect transistor T2, and once the alternating current power supply of the depth finder is powered off or the voltage is too low, the buzzer BZ1 gives out alarm sound, so that the effect of power-off alarm is achieved.
Description
Technical Field
The utility model belongs to the technical field of the electronic circuit, concretely relates to depth finder outage autoalarm system.
Background
The depth sounder is an instrument necessary for ship navigation equipment, the depth of sea water in the process of navigation of a ship must be ensured, depth signals are input into electronic sea maps to be displayed on navigation points one by one, and the depth signals are also connected to a VDR (visual display Rate) to transmit the depth information of every moment to a hard disk to be stored so as to be convenient for inquiry, but once the ship power failure depth sounder of more old ships works, real information cannot be obtained, so the depth sounder must be required to be provided with a power failure alarm device according to the requirement of ship detection, and the working state of the depth sounder can be known in time.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a depth finder outage autoalarm system, can detect the power supply state of depth finder, in case outage or voltage cross lowly can send autoalarm, play safe and effectual effect to the navigation of boats and ships.
The utility model discloses a realize through following technical scheme:
an automatic power-off alarm system of a depth finder comprises a triode T1, a field-effect tube T2, a diode D1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a buzzer BZ1 and a battery BT 1;
the diode D1, the resistor R1, the resistor R2, the resistor R3 and the resistor R4 are sequentially connected in series, and two ends of a circuit after being connected in series are connected to a 220V alternating current power supply of the depth finder;
the base electrode of the triode T1 is connected with the resistor R2 and the resistor R3, the collector electrode of the triode T1 is connected with the grid electrode of the field effect tube T2, the source electrode of the field effect tube T2 is connected with the negative electrode of the battery BT1, the drain electrode of the field effect tube T2 is connected with the positive electrode of the battery BT1 through the buzzer BZ1, the collector electrode of the triode T1 is also connected with the positive electrode of the battery BT1 through the resistor R5, and the emitter electrode of the triode T1 is connected with the negative electrode of the battery BT 1.
In the above technical solution, a capacitor C1 is further connected between the resistor R1 and the resistor R4, and the capacitor C1 is 100 nF.
In the above technical solution, the fet T2 is an N-channel depletion type MOS fet.
In the above technical solution, the resistor R1 is 10M Ω, the resistor R2 is 10M Ω, the resistor R3 is 470K Ω, the resistor R4 is 10M Ω, and the resistor R5 is 10M Ω.
In the technical scheme, the battery BT1 is a storage battery, and the voltage is 9V.
The utility model discloses an advantage and beneficial effect do:
the utility model discloses can detect the power supply state of depth finder, in case outage or voltage cross lowly can send automatic alarm, play safe and effectual effect to the navigation of boats and ships.
Drawings
Fig. 1 is a circuit diagram of the power-off automatic alarm system of the depth finder.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical field person understand the solution of the present invention better, the technical solution of the present invention is further described below with reference to the specific embodiments.
Referring to the attached figure 1, the automatic power-off alarm system of the depth finder comprises a triode T1, a field-effect tube T2, a diode D1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a buzzer BZ1 and a battery BT 1.
The diode D1, the resistor R1, the resistor R2, the resistor R3 and the resistor R4 are sequentially connected in series, and two ends of the circuit after being connected in series are connected to an L line and an N line of a 220V alternating current power supply of the depth finder.
The base electrode of the triode T1 is connected with the resistor R2 and the resistor R3, the collector electrode of the triode T1 is connected with the grid electrode of the field effect tube T2, the source electrode of the field effect tube T2 is connected with the negative electrode of the battery BT1, the drain electrode of the field effect tube T2 is connected with the positive electrode of the battery BT1 through the buzzer BZ1, the collector electrode of the triode T1 is also connected with the positive electrode of the battery BT1 through the resistor R5, and the emitter electrode of the triode T1 is connected with the negative electrode of the battery BT 1.
Further, a capacitor C1 is connected between the resistor R1 and the resistor R4 (i.e., one end of the capacitor C1 is connected between the resistor R1 and the resistor R2, and the other end of the capacitor C1 is connected between the resistor R3 and the resistor R4).
Further, the fet T2 is an N-channel depletion type MOS fet.
Further, the resistor R1 is 10M Ω, the resistor R2 is 10M Ω, the resistor R3 is 470K Ω, the resistor R4 is 10M Ω, the resistor R5 is 10M Ω, and the capacitor C1 is 100 nF.
Further, battery BT1 is a battery, and the voltage is 9V.
The working principle of the system is as follows:
the 220V alternating current power supply of the depth finder is subjected to half-wave rectification by a diode D1 and is connected with a resistor R1, a resistor R2, a resistor R3 and a resistor R4 in series to divide voltage, a small voltage is obtained on a resistor R3 to control the working states of a triode T1 and a field-effect tube T2, and once the alternating current power supply of the depth finder is powered off or the voltage is too low, a buzzer BZ1 gives an alarm sound, so that the effect of power-off alarm is achieved.
Specifically, since the diode D1 performs a half-wave rectification function, a pulse dc signal is sent to the transistor T1, under the normal condition of the 220V ac voltage, the power supply of the resistor R3 can keep the transistor T1 on, and the fet T2 is in an off state, once the 220V ac voltage is cut off or is lower than 50V, the voltage drop of the resistor R3 is lower than the voltage value required for the transistor T1 to be on, at this time, the transistor T1 is off (i.e., the connection between the collector and the emitter of the transistor T1 corresponds to the off state of the switch), and the gate voltage of the fet T2 is raised enough to turn on the fet T2, so that the loop of the buzzer BZ1 is turned on (i.e., the loop of the BZ1, the T2, and the BT1 is turned on), and.
The invention has been described above by way of example, and it should be noted that any simple variants, modifications or other equivalent substitutions by a person skilled in the art without spending creative effort may fall within the scope of protection of the present invention without departing from the core of the present invention.
Claims (6)
1. The utility model provides a depth finder outage autoalarm system which characterized in that: the device comprises a triode T1, a field effect transistor T2, a diode D1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a buzzer BZ1 and a battery BT 1;
the diode D1, the resistor R1, the resistor R2, the resistor R3 and the resistor R4 are sequentially connected in series, and two ends of a circuit after being connected in series are connected to a 220V alternating current power supply of the depth finder;
the base electrode of the triode T1 is connected with the resistor R2 and the resistor R3, the collector electrode of the triode T1 is connected with the grid electrode of the field effect tube T2, the source electrode of the field effect tube T2 is connected with the negative electrode of the battery BT1, the drain electrode of the field effect tube T2 is connected with the positive electrode of the battery BT1 through the buzzer BZ1, the collector electrode of the triode T1 is also connected with the positive electrode of the battery BT1 through the resistor R5, and the emitter electrode of the triode T1 is connected with the negative electrode of the battery BT 1.
2. The depth finder power-off automatic alarm system of claim 1, wherein: a capacitor C1 is also connected between the resistor R1 and the resistor R4.
3. The depth finder power-off automatic alarm system of claim 1, wherein: the field effect transistor T2 is an N-channel depletion type MOS field effect transistor.
4. The depth finder power-off automatic alarm system of claim 1, wherein: the resistance R1 is 10M Ω, the resistance R2 is 10M Ω, the resistance R3 is 470K Ω, the resistance R4 is 10M Ω, and the resistance R5 is 10M Ω.
5. The depth finder power-off automatic alarm system of claim 2, wherein: the capacitance C1 is 100 nF.
6. The depth finder power-off automatic alarm system of claim 2, wherein: battery BT1 is a battery and has a voltage of 9V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922373700.6U CN211979031U (en) | 2019-12-25 | 2019-12-25 | Automatic power-off alarm system of depth finder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922373700.6U CN211979031U (en) | 2019-12-25 | 2019-12-25 | Automatic power-off alarm system of depth finder |
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| Publication Number | Publication Date |
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| CN211979031U true CN211979031U (en) | 2020-11-20 |
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| CN201922373700.6U Active CN211979031U (en) | 2019-12-25 | 2019-12-25 | Automatic power-off alarm system of depth finder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345138A (en) * | 2021-05-20 | 2021-09-03 | 浙江科技学院 | Electronic information control safety anti-theft door |
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2019
- 2019-12-25 CN CN201922373700.6U patent/CN211979031U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345138A (en) * | 2021-05-20 | 2021-09-03 | 浙江科技学院 | Electronic information control safety anti-theft door |
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