Voltage detection circuit
A voltage detection circuit and voltage technology, applied in the direction of measuring current/voltage, measuring electricity, measuring devices, etc., can solve the problems of non-latching, abnormal power supply, abnormal output voltage of products, etc., achieving low cost, simple circuit implementation, Small size effect
Active Publication Date: 2017-12-15
MORNSUN GUANGZHOU SCI & TECH
View PDF8 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] Now that all kinds of equipment are manufactured, in order to prevent early failure, aging screening will be carried out. For abnormal phenomena that only appear at high temperatures, but will not appear when returning to normal temperature, such problems are Difficult to screen by conventional aging methods
[0003] The existing aging screening method is high temperature aging. Before and after aging, observe whether the input voltage of the product is normal, and the detected abnormality cannot be latched. During the aging process, the product has an abnormal output voltage, and it cannot be screened out.
[0004] Most of the existing voltage detection circuits only detect the output voltage, and do not simultaneously detect the input voltage and eliminate the abnormal output voltage caused by the abnormal input voltage.
Therefore, when the existing voltage detection circuit detects that the output voltage is powered off, it cannot be confirmed whether it is caused by an abnormal product or an abnormal power supply.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
no. 1 example
[0025] figure 1 It shows a functional block diagram, following the connection relationship of the above initial technical solution, the specific timing sequence of the voltage change at each point of the voltage detection circuit in the first embodiment is as follows Figure 4 .
[0026] The present invention has following 5 characteristics:
[0027] 1. When the power supply device does not supply power, the alarm display circuit will not falsely alarm.
[0028] 2. After the power supply device supplies power, there is a power failure again, and the alarm display circuit does not falsely alarm.
[0029] 3. After the normal power supply of the power supply device, the output voltage is cut off due to the abnormal operation of the equipment under test.
[0030] Call the police.
[0031] 4. The power supply device works normally, the backup power supply device does not work, and the whole circuit can work normally.
[0032] 5. After the power supply device is powered off, as...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention provides a voltage detection circuit. The circuit comprises a voltage comparator 1, a controlled switch, a self-locking circuit, an alarm display circuit, an auxiliary power source, a delay circuit, a voltage comparator 2 and a power supply processing circuit. The circuit is capable of simultaneously detecting input and output voltage. When a tested device has no output due to the failure of the power supply of a power supply device or the tested device is de-energized due to the power outage of the power supply device, no alarms are triggered; the power supply device supplies power and goes through power failure, the alarm display circuit does not wrongly give out an alarm; and after the power supply device resumes normal power supply, and then goes through output voltage outage due to the abnormal work of the tested device, the alarm display circuit triggers alarms.
Description
technical field [0001] The invention relates to a voltage detection circuit, in particular to a circuit for simultaneous detection of voltages with DC voltage input and DC voltage output. Background technique [0002] Now that all kinds of equipment are manufactured, in order to prevent early failure, aging screening will be carried out. For abnormal phenomena that only appear at high temperatures, but will not appear when returning to normal temperature, such problems are Difficult to screen through conventional aging methods. [0003] The existing aging screening method is high-temperature aging. Before and after aging, observe whether the input voltage of the product is normal, and the detected abnormality cannot be latched. During the aging process, the product has an abnormal output voltage, and it cannot be screened out. [0004] Most existing voltage detection circuits only detect the output voltage, but do not simultaneously detect the input voltage and eliminate th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165G01R31/00
CPCG01R19/16538G01R19/16576G01R31/003Y04S20/20Y02B70/30
Inventor 郑典清刘改冯刚
Owner MORNSUN GUANGZHOU SCI & TECH