CN215116727U - Power failure alarm circuit and power consumption equipment - Google Patents
Power failure alarm circuit and power consumption equipment Download PDFInfo
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- CN215116727U CN215116727U CN202121476231.1U CN202121476231U CN215116727U CN 215116727 U CN215116727 U CN 215116727U CN 202121476231 U CN202121476231 U CN 202121476231U CN 215116727 U CN215116727 U CN 215116727U
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Abstract
The utility model provides a fall electric alarm circuit and consumer when first power supply normally supplies power, the triode switches on just the switch unit ends, so that power supply does rechargeable battery with the alarm unit power supply. When the first power supply is abnormally powered down, the triode is cut off, the switch unit is conducted, the rechargeable battery supplies power for the alarm unit, and the alarm unit gives an alarm. Through the connection of the triode, the rechargeable battery, the switch unit and the alarm unit, the power failure alarm protection of the medical instrument is realized through a simple hardware circuit, and through the difference of voltage signals of the rechargeable battery and the power supply, the control of whether the alarm unit alarms or not is realized without occupying single chip resources.
Description
Technical Field
The utility model relates to a circuit control field particularly, relates to a fall electric alarm circuit and consumer.
Background
Most of the existing power failure alarm schemes for medical instruments use a super capacitor or a lithium ion battery as power supply, and through matching circuits such as a boost chip and a logic chip, an alarm system can be triggered when the power supply of the system fails. However, the following problems generally exist in the current schemes: (1) the battery charging needs to adopt a special battery charging management chip; (2) the battery can supply power to the rear stage after voltage conversion; (3) the cost is generally higher; (4) the alarm trigger needs to occupy the resources of the single chip microcomputer.
Therefore, a power failure alarm scheme which is pure in hardware, low in cost, simple and reliable is needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the utility model is to provide a fall electric alarm circuit and consumer, can provide a pure hardware, low-cost, simple reliable fall electric alarm scheme, concrete scheme is as follows:
in a first aspect, an embodiment of the present disclosure provides a power failure alarm circuit, where the power failure alarm circuit includes a triode, a rechargeable battery, a switch unit, and an alarm unit;
the collector of the triode and the power supply end of the alarm unit are both used for being connected with a first power supply, the emitter of the triode is connected with the anode of the rechargeable battery, and the anode of the rechargeable battery is electrically connected with the power supply end of the alarm unit through the switch unit;
when the first power supply supplies power, the triode is conducted and the switch unit is cut off, so that the power supply supplies power to the rechargeable battery and the alarm unit;
when the first power supply is powered off, the triode is cut off, the switch unit is switched on, the rechargeable battery supplies power for the alarm unit, and the alarm unit gives an alarm.
According to a specific embodiment of the present disclosure, the switch unit is configured to be connected to a second power supply, the switch unit includes a first field effect transistor and a second field effect transistor, and the first field effect transistor and the second field effect transistor are both P-channel field effect transistors;
the drain electrode of the first field effect transistor is connected with the drain electrode of the second field effect transistor;
the source electrode of the first field effect transistor is connected with the anode of the rechargeable battery, and the source electrode of the second field effect transistor is connected with the power supply end of the alarm unit;
and the grids of the first field effect transistor and the second field effect transistor are both used for being connected with the second power supply.
According to a specific embodiment of the present disclosure, the alarm unit includes a microprocessor, a voice unit, and a speaker;
the source electrode of the second field effect transistor is connected with the power supply end of the microprocessor, and the source electrode of the second field effect transistor is also connected with the power supply end of the voice unit;
the control end of the microprocessor is connected with the control end of the voice unit;
the output end of the voice unit is connected with the loudspeaker.
According to a specific embodiment of the present disclosure, the voice unit further includes a voice chip and a plug-in cache unit;
the power supply ends of the voice chip and the plug-in cache unit are connected with the source electrode of the second field effect transistor;
the voice chip is connected with the plug-in cache unit through a serial peripheral interface;
the output end of the voice chip is connected with the loudspeaker.
According to a specific embodiment of the present disclosure, the circuit further comprises a diode;
the anode of the diode is used for being connected with the first power supply;
and the cathode of the diode is used for connecting the power supply end of the alarm unit.
According to a specific embodiment of the present disclosure, the circuit further includes a first resistor;
and the collector of the triode is used for being connected with the first power supply through the first resistor.
According to a specific embodiment of the present disclosure, the circuit further includes a voltage regulating branch, where the voltage regulating branch includes a second resistor and a third resistor;
the base electrode of the triode is used for being connected with the first power supply through a second resistor;
the base electrode of the triode is grounded through a third resistor.
According to a specific embodiment of the present disclosure, the second resistor and the third resistor are both adjustable resistors.
According to a specific embodiment of the present disclosure, the circuit further includes a fourth resistor;
and the grid electrode of the first field effect transistor and the grid electrode of the second field effect transistor are grounded through the fourth resistor.
In a second aspect, an embodiment of the present disclosure further provides an electric device, including the power failure alarm circuit in the first aspect.
The utility model provides a pair of fall electric alarm circuit and consumer's beneficial effect is when first power supply is normal to be supplied power, the triode switches on just the switch unit ends, so that power supply does rechargeable battery with the alarm unit power supply. When the first power supply is abnormally powered down, the triode is cut off, the switch unit is conducted, the rechargeable battery supplies power for the alarm unit, and the alarm unit gives an alarm. Through the connection of the triode, the rechargeable battery, the switch unit and the alarm unit, the power failure alarm protection of the medical instrument is realized through a simple hardware circuit, and through the difference of voltage signals of the rechargeable battery and the power supply, the control of whether the alarm unit alarms or not is realized without occupying single chip resources.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic block diagram of a power down alarm circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit connection diagram of a power down alarm circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit connection diagram of an alarm unit of a power down alarm circuit provided by an embodiment of the present invention.
Icon: power-down alarm circuit-100; a triode-110; a rechargeable battery-120; a switching unit-130; an alarm unit-140;
a microprocessor-141; a voice chip-142; a plug-in cache unit-143; a horn-144;
a first power supply-210; a second power supply-220.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and for simplicity of description, and do not indicate or imply that the equipment or components that are referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The global medical device industry is growing rapidly and is growing as the mainstay of the world's economy. According to the industry association, the worldwide market for medical devices reaches $ 3500 billion in 2009, and can keep the annual growth rate of more than 7 percent continuously increasing. Meanwhile, the international trade amount of medical equipment products is increased at a speed of 25% every year, the sales profit rate reaches 15-25%, and the added value of the products is high, so that the medical equipment products become one of the industrial categories which have the fastest economic development and the most active trade in the world nowadays.
Consumer electronics and many other industries are increasingly concerned about the mobility of products, and medical device manufacturers are no exception, so that the trend improves the performance of on-site rescue equipment, monitoring equipment and fixed medical equipment, and further promotes the development of the healthcare industry. However, in addition to portability, there is a need to be able to manufacture highly reliable instruments, as people's lives tend to be at the forefront. The problems facing end users and patients are much more severe if the portable cardiac monitor or infusion pump stops functioning due to a depleted battery. Patient mobility is also becoming increasingly important. Portable medical devices must actually be portable in the full sense to provide optimal service to patients. The demand for smaller, more lightweight medical devices has therefore increased dramatically, which has stimulated interest in higher energy density, smaller lithium batteries for medical devices. The lithium battery has potential advantages due to the characteristics of small volume, light weight, high energy, long cycle life, good durability, high voltage and good heat resistance.
According to the relevant standards, infusion pumps must trigger an audible alarm signal when the power supply is accidentally disconnected or the power supply network fails, and the time required for this alarm is at least 3 minutes. Therefore, in the process, a stable power supply and a simple and practical alarm triggering control circuit are needed. Of course, the power failure alarm circuit provided by the embodiment is not only applied to medical instruments, but also applied to electric equipment with other power failure alarm requirements.
Referring to fig. 1, the present embodiment provides a power failure warning circuit 100, as shown in fig. 1, the power failure warning circuit 100 includes a transistor 110, a rechargeable battery 120, a switch unit 130, and an alarm unit 140;
the collector of the triode 110 and the power supply end of the alarm unit 140 are both used for connecting a first power supply 210, the emitter of the triode 110 is connected with the positive electrode of the rechargeable battery 120, and the positive electrode of the rechargeable battery 120 is electrically connected with the power supply end of the alarm unit 140 through the switch unit 130;
when the first power supply 210 supplies power, the transistor 110 is turned on and the switching unit 130 is turned off, so that the power supply supplies power to the rechargeable battery 120 and the alarm unit 140;
when the first power supply 210 is powered off, the triode 110 is turned off, the switch unit 130 is turned on, the rechargeable battery 120 supplies power to the alarm unit 140, and the alarm unit 140 gives an alarm.
As shown in fig. 2, the rechargeable battery 120 is a battery J1, and the positive electrode of the battery J1 is connected to the emitter of the transistor 110. The rechargeable battery 120 may be a super capacitor or a lithium battery, and preferably, the rechargeable battery 120 is a lithium battery, and the transistor 110 is a transistor Q1.
The first power supply 210 is connected to the battery J1 through the transistor 110, so that when the first power supply 210 is in a normal power mode, the first power supply 210 charges the battery J1 through the transistor 110, and the first power supply 210 is VCC 1.
According to a specific embodiment of the present disclosure, the circuit further includes a first resistor R1;
the collector of the transistor 110 is connected to the first power supply 210 through the first resistor R1.
The first resistor R1 can be used as an overcurrent protection resistor for overcurrent protection when the first power supply 210 charges the battery.
Specifically, the circuit further comprises a voltage regulating branch, wherein the voltage regulating branch comprises a second resistor R2 and a third resistor R3, and the second resistor R2 and the third resistor R3 are both adjustable resistors;
the base of the triode 110 is used for being connected with the first power supply 210 through a second resistor R2;
the base of the transistor 110 is also connected to ground through a third resistor R3.
By adjusting the sizes of the second resistor R2 and the third resistor R3, the charging voltage input to the battery can be controlled, and the over-current and over-voltage protection can be realized by matching with the triode 110.
For example, the maximum charging voltage of the battery and the Vbe voltage of the triode 110 need to be guaranteed to be 0.7V, the Vbe is divided to be 4.9V through the second resistor R2 and the third resistor R3 to supply power, Vbe-Vbat is greater than or equal to 0.7V, so that the maximum voltage of the battery is guaranteed not to exceed 4.2V, if the Vbat exceeds 4.2V, the triode 110Vbe cannot meet the conducting condition of 0.7V, and the triode 110 is cut off to achieve battery overcharge protection.
Specifically, the circuit further comprises a diode D1;
the anode of the diode D1 is used for connecting the first power supply 210;
the cathode of the diode D1 is used for connecting the power supply terminal of the alarm unit 140.
The first power supply 210 is connected to the alarm unit 140 through the diode D1, and supplies power to the alarm unit 140 when the first power supply 210 is in a normal power mode. And because of the diode D1, when the first power supply is powered off and the alarm unit 140 is powered by the battery J1, the current does not remain in a branch of the first power supply 210, so as to ensure the power supply effect of the battery J1 on the alarm unit 140.
The battery J1 is connected to the power supply terminal of the alarm unit 140 through the switching unit 130, thereby isolating the charging circuit of the battery J1 from the alarm circuit through the switching unit 130. That is, the charging part of the circuit is isolated from the power supply circuit of the alarm part by the switching unit 130, so that the first power supply 210 charges the battery J1, and the power supply to the alarm unit 140 by the first power supply 210 is performed separately, so that the first power supply 210 does not charge the battery J1 again in the reverse direction when supplying power to the alarm unit 140.
As shown in fig. 2, the switching unit 130 is configured to be connected to the second power supply 220, the switching unit 130 includes a first fet MOS1 and a second fet MOS2, and the first fet MOS1 and the second fet MOS2 are both P-channel fets;
the drain electrode of the first field effect transistor MOS1 is connected with the drain electrode of the second field effect transistor MOS 2;
the source of the first field effect transistor MOS1 is connected with the positive electrode of the rechargeable battery 120, and the source of the second field effect transistor MOS2 is connected with the power supply terminal of the alarm unit 140;
the gates of the first fet MOS1 and the second fet MOS2 are both used for connecting the second power supply 220.
When the second power supply 220 supplies a voltage to the gate of the first fet MOS1 and the gate of the second fet MOS2, the first fet MOS1 and the second fet MOS2 are turned off. When the gate of the first fet MOS1 and the gate of the second fet MOS2 are grounded, the first fet MOS1 and the second fet MOS2 are turned on, and the second power supply 220 is VCC 2.
In an actual use process, the first power supply 210 and the second power supply 220 may be power supplies for supplying power to a product, the product is divided into a dual-processor operating mode, the second power supply 220 is a normal power supply for ensuring that a main processor is kept dormant and operating, and the first power supply 210 is a power supply with a control switch.
That is, when the product is in a normal power supply state, the first power supply 210 and the second power supply 220 are both in a normal power supply state, and supply power to the battery and the alarm unit 140. And the second power supply 220 is connected to the gate of the first fet MOS1 and the gate of the second fet MOS2, so that the first fet MOS1 and the second fet MOS2 are in the off state, and the current of the rechargeable battery 120 cannot be input to the alarm unit 140 through the circuit. And the first power supply 210 cannot charge the rechargeable battery 120 again in the reverse direction.
When the product is in a normal power-off state, the first power supply 210 stops supplying power, and the second power supply 220 keeps normally powered, so that the first fet MOS1 and the second fet MOS2 keep an off state, and the battery discharge loss caused by the presence of a load is not caused.
When the product is in an abnormal power-off state, that is, when the system is powered off, the first power supply 210 and the second power supply 220 are powered off at the same time, the gate of the first fet MOS1 and the gate of the second fet MOS2 are both grounded through the fourth resistor R4, so that the first fet MOS1 and the second fet MOS2 are turned on, and the power supply terminal of the alarm unit 140 receives the charging signal of the battery J1, thereby giving an alarm.
As shown in fig. 3, the alarm unit 140 includes a microprocessor 141, a voice unit, and a speaker 144;
the source of the second field effect transistor MOS2 is connected with the power supply terminal of the microprocessor 141, and the source of the second field effect transistor MOS2 is also connected with the power supply terminal of the voice unit;
the control end of the microprocessor 141 is connected with the control end of the voice unit;
the output of the speech unit is connected to the speaker 144.
When the product is in the normal operation mode, the microprocessor 141 of the alarm unit 140 receives the power supply signal of the first power supply 210 and operates normally.
When the product is in a power-down mode, the microprocessor 141 of the alarm unit 140 receives a power supply signal sent by the rechargeable battery 120, and the microprocessor 141 sends an alarm address instruction to the voice unit according to the difference of the received power supply signal while ensuring the normal operation of the microprocessor 141. And the voice unit gives an alarm according to the alarm address instruction.
According to a specific embodiment of the present disclosure, the voice unit further includes a voice chip 142 and a plug-in cache unit 143;
the power supply ends of the voice chip 142 and the plug-in cache unit 143 are both connected with the source electrode of the second field effect transistor MOS 2;
the voice chip 142 is connected with the plug-in cache unit 143 through a serial peripheral interface;
the output end of the voice chip 142 is connected with the speaker 144.
After the system is powered off, the first power supply 210 and the second power supply 220 do not exist, and the battery J1 discharges electricity to the alarm unit 140 through the switch unit 130 to respectively supply electricity to the microprocessor 141, the voice chip 142 and the plug-in cache unit 143. After the voice chip 142 receives the alarm address instruction sent by the microprocessor 141, the voice chip 142 communicates with the plug-in cache unit 143 through an SPI serial peripheral interface, and extracts an alarm voice file corresponding to the alarm address instruction from the plug-in cache unit 143. After the voice chip 142 extracts the corresponding alarm voice file, DAC outputs the alarm content to control the speaker 144 to play, so as to realize alarm when the product has power failure problem.
In addition, the embodiment of the present disclosure further provides an electric device, which includes the power failure alarm circuit 100 described in the above embodiment.
In summary, the embodiment of the present disclosure provides a power failure alarm circuit 100 and an electric device, which can perform overcurrent and overvoltage protection on battery charging through a simple triode, and can replace a battery charging management chip; when the battery is charged, the existence of the field effect tube can ensure that the battery is completely isolated from the power supply of a rear-stage load; under the normal power off state, the battery does not have the current loss caused by no isolation, so that the adverse effect of over-discharge is avoided; when the system is powered off, the alarm system can be triggered by pure hardware under the condition of not needing single-chip microcomputer control; the battery is protected by overcurrent, overcharge and overdischarge, so that the service life of the battery is greatly prolonged; the devices used by the circuit are all discrete devices, and compared with the existing scheme, the circuit has the advantages of being simple in cost, stable and reliable in implementation and capable of giving out power failure alarm for protecting the battery better.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A power failure alarm circuit is characterized by comprising a triode, a rechargeable battery, a switch unit and an alarm unit;
the collector of the triode and the power supply end of the alarm unit are both used for being connected with a first power supply, the emitter of the triode is connected with the anode of the rechargeable battery, and the anode of the rechargeable battery is electrically connected with the power supply end of the alarm unit through the switch unit;
when the first power supply supplies power, the triode is conducted and the switch unit is cut off, so that the power supply supplies power to the rechargeable battery and the alarm unit;
when the first power supply is powered off, the triode is cut off, the switch unit is switched on, the rechargeable battery supplies power for the alarm unit, and the alarm unit gives an alarm.
2. The circuit of claim 1, wherein the switch unit is configured to be connected to a second power supply, and the switch unit includes a first fet and a second fet, and both the first fet and the second fet are P-channel fets;
the drain electrode of the first field effect transistor is connected with the drain electrode of the second field effect transistor;
the source electrode of the first field effect transistor is connected with the anode of the rechargeable battery, and the source electrode of the second field effect transistor is connected with the power supply end of the alarm unit;
and the grids of the first field effect transistor and the second field effect transistor are both used for being connected with the second power supply.
3. The circuit of claim 2, wherein the alarm unit comprises a microprocessor, a voice unit, and a speaker;
the source electrode of the second field effect transistor is connected with the power supply end of the microprocessor, and the source electrode of the second field effect transistor is also connected with the power supply end of the voice unit;
the control end of the microprocessor is connected with the control end of the voice unit;
the output end of the voice unit is connected with the loudspeaker.
4. The circuit of claim 3, wherein the voice unit further comprises a voice chip and a plug-in cache unit;
the power supply ends of the voice chip and the plug-in cache unit are connected with the source electrode of the second field effect transistor;
the voice chip is connected with the plug-in cache unit through a serial peripheral interface;
the output end of the voice chip is connected with the loudspeaker.
5. The circuit of claim 2, further comprising a diode;
the anode of the diode is used for being connected with the first power supply;
and the cathode of the diode is used for connecting the power supply end of the alarm unit.
6. The circuit of claim 1, further comprising a first resistor;
and the collector of the triode is used for being connected with the first power supply through the first resistor.
7. The circuit of claim 1, further comprising a voltage regulation branch comprising a second resistor and a third resistor;
the base electrode of the triode is used for being connected with the first power supply through a second resistor;
the base electrode of the triode is grounded through a third resistor.
8. The circuit of claim 7, wherein the second resistor and the third resistor are both adjustable resistors.
9. The circuit of claim 2, further comprising a fourth resistor;
and the grid electrode of the first field effect transistor and the grid electrode of the second field effect transistor are grounded through the fourth resistor.
10. An electric consumer comprising the power down warning circuit of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121476231.1U CN215116727U (en) | 2021-06-30 | 2021-06-30 | Power failure alarm circuit and power consumption equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121476231.1U CN215116727U (en) | 2021-06-30 | 2021-06-30 | Power failure alarm circuit and power consumption equipment |
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| Publication Number | Publication Date |
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| CN215116727U true CN215116727U (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121476231.1U Active CN215116727U (en) | 2021-06-30 | 2021-06-30 | Power failure alarm circuit and power consumption equipment |
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| CN (1) | CN215116727U (en) |
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- 2021-06-30 CN CN202121476231.1U patent/CN215116727U/en active Active
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Denomination of utility model: A power failure alarm circuit and electric equipment Effective date of registration: 20221028 Granted publication date: 20211210 Pledgee: Hunan Xiangjiang Zhongying Investment Management Co.,Ltd. Pledgor: HUNAN BEYOND MEDICAL TECHNOLOGY CO.,LTD. Registration number: Y2022980020185 |