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Portable earthquake alarm based on 51 singlechip

A single-chip, alarm technology, applied in the direction of alarms, instruments, etc., can solve the problems of undiscovered equipment introduction, etc., and achieve the effect of easy promotion, novel concept, and improved accuracy

Inactive Publication Date: 2011-04-20
如皋市生产力促进中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, no introduction of equipment similar to this invention has been found in core journals and patent inquiries

Method used

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  • Portable earthquake alarm based on 51 singlechip
  • Portable earthquake alarm based on 51 singlechip
  • Portable earthquake alarm based on 51 singlechip

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Embodiment Construction

[0012] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0013] combine figure 1 , the portable earthquake alarm based on 51 single-chip microcomputers of the present invention includes a data processor U1 and a data comparison unit U2, wherein U1 adopts a STC89C52 single-chip microcomputer, and U2 adopts an LM339N chip.

[0014] combine figure 2 , VCC (pin 40) of the digital microprocessor U1 is the power supply terminal, GND (pin 20) is the ground terminal, and the two pins indirect resistors R1 and R2. XTAL1 (20 feet), XTAL2 (19 feet) are external oscillator pins, connected to the crystal oscillator, and connected in parallel with C2 and C3 capacitors. RESET (pin 10) is connected to the reset signal input end of the CPU. P10 (pin 1) is connected to green light-emitting diode D1 and resistor R7 in series, P11 (pin 2) is connected to red light-emitting diode D2 and resistor R8 in series, P20 (pin 21) is connected t...

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PUM

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Abstract

The invention provides a portable earthquake alarm based on a 51 singlechip, which comprises a 51 singlechip, a LM339N comparator and a buzzer; 5V electromotive force as a single change generated by circuit conduction caused by water wave vibration in earthquake process is inducted by the LM339 N comparator and is inputted to the 51 singlechip, the 51 singlechip receives the potential change and controls the buzzer through the program. In the invention, the 52 singlechip is adopted by the earthquake alarm; the conduction caused by the water wave vibration only provides 5 V potential difference for the device rather than the detection current change so that the requirement on water quality is not high, and even clean water can meet the design demands. The invention can be directly mounted on the water containers such as household fish tanks, facilitates popularization, utilizes the combination of analog circuit and digital circuit, improves the alarm accuracy, also has ingenious design, simple structure and low cost.

Description

technical field [0001] The invention relates to an alarm device, in particular to an earthquake alarm device. Background technique [0002] China is one of the countries with high incidence of earthquakes. At present, in order to make accurate prediction of earthquakes and minimize the damage to people's lives and properties, most of the alarms developed are simple mechanical sensors, which have low precision and take up space. Larger cost is higher, not easy to popularize. How to realize the low-cost alarm that can accurately and real-time implement the alarm to the occurrence of earthquakes has become one of the problems to be solved urgently. At present, no introduction of equipment similar to this invention has been found in core journals and patent inquiries. Contents of the invention [0003] The purpose of the present invention is to provide a portable earthquake alarm based on 51 single-chip microcomputers that can accurately and real-time alarm the occurrence of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B21/10
Inventor 陈潇李冰
Owner 如皋市生产力促进中心