Apparatus of monitoring motor vehicle's electric power and method thereof
First Claim
1. In an apparatus provided in a motor vehicle, the apparatus comprising a monitor and alarm device parallel connected to both a battery to be measured and a starting motor of the motor vehicle;
- wherein the starting motor is taken as a load for forming an outer loop sampling circuit, 1/t second is set as a sampling time interval during discharging, voltage and current curves are formed by connecting a plurality of continuous voltage values each sampled in 1/t second, and a minimum voltage of the voltage curve is compared with a predetermined alarm value for determining a status of the battery to be measured, and an alarm is issued in time if the status of the battery to be measured is abnormal.
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Accused Products
Abstract
An apparatus of monitoring motor vehicle'"'"'s electric power and method thereof are provided. The apparatus is disposed in the motor vehicle and includes a monitor and alarm device parallel connected to both a battery to be measured and a starting motor of the motor vehicle. The starting motor is taken as a load for forming an outer loop sampling circuit, 1/t second is set as a sampling time interval during discharging, voltage and current curves are formed by connecting a plurality of continuous voltage values each sampled in 1/t second, a minimum voltage of the voltage curve is compared with a predetermined alarm value for determining a status of the battery to be measured, and an alarm is issued in time if the status of the battery to be measured is abnormal.
9 Citations
19 Claims
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1. In an apparatus provided in a motor vehicle, the apparatus comprising
a monitor and alarm device parallel connected to both a battery to be measured and a starting motor of the motor vehicle; wherein the starting motor is taken as a load for forming an outer loop sampling circuit, 1/t second is set as a sampling time interval during discharging, voltage and current curves are formed by connecting a plurality of continuous voltage values each sampled in 1/t second, and a minimum voltage of the voltage curve is compared with a predetermined alarm value for determining a status of the battery to be measured, and an alarm is issued in time if the status of the battery to be measured is abnormal.
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2. A method of monitoring the motor vehicle'"'"'s electric power comprising the steps of:
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(a) in an outer loop sampling;
taking a starting motor as a load, and sampling a battery to be measured every 1/t second for obtaining a sampled voltage;
(b) in a data storage;
obtaining a voltage curve by connecting a plurality of continuous voltage values each sampled in every 1/t second;
(c) in a calculation;
calculating a minimum voltage and recording the same,(d) in a comparison;
comparing a recorded minimum voltage with a predetermined alarm value so that if the minimum voltage is higher than the predetermined alarm value, it meaning that the battery to be measured is normal else it meaning that a lowest point of the voltage curve has been reached or passed and the battery to be measured is determined to be abnormal; and
(e) in a result display;
displaying a result of the calculation in the step (c) on a display, and issuing an alarm if the predetermined alarm value is reached in the step (d);
whereby it is of repeatedly performing the steps (a) to (e) for monitoring the battery to be measured for a long time, thereby informing a driver of a power level of the battery prior to starting an engine by noticing whether an alarm has been issued. - View Dependent Claims (3, 4, 5, 6)
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7. An apparatus of monitoring a motor vehicle'"'"'s electric power, the apparatus provided in the motor vehicle, the apparatus comprising a monitor and alarm device parallel connected to a current source to be measured, the monitor and alarm device comprising:
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a stabilization circuit being operative to provide a constant current to a CPU or a MCU and a circuit for operation;
a CPU (central processing unit) or MCU (microprocessor control unit) being operative to control sampling of voltage, data storage, calculation, comparison, and result display;
a voltage sampling circuit commanded by the CPU or the MCU to fetch voltage data from the current source to be measured every 1/t second and to send the fetched voltage data to the CPU or the MCU for processing; and
a display circuit commanded by the CPU or the MCU to show a measurement result on a LCD (liquid crystal display) or any of other displays;
wherein the current source to be measured includes a battery to be measured and a parallel starting motor. - View Dependent Claims (8, 9, 10, 11)
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12. In an apparatus provided in a motor vehicle, the apparatus including a monitor and alarm device parallel connected to both a battery to be measured and a starting motor of the motor vehicle wherein a double loop technique is employed to monitor an available power of a current source to be measured in a long time basis, the starting motor is taken as a load for forming an outer loop sampling circuit, an inner loop sampling circuit is formed by utilizing an internal load of the monitor and alarm device, and alternatively performs different monitoring modes by suitably dividing time into a plurality of time intervals, a method of monitoring the motor vehicle'"'"'s electric power in the outer loop sampling circuit comprising the steps of:
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(a) in an outer loop sampling;
taking the starting motor as the load, and sampling the battery to be measured every 1/t second for obtaining a sampled voltage;
(b) in a data storage;
obtaining the voltage curve by connecting a plurality of continuous voltage values;
(c) in a calculation;
calculating a minimum voltage and recording the same,(d) in a comparison;
comparing the recorded minimum voltage with the predetermined alarm value so that if the minimum voltage is higher than the predetermined alarm value it meaning that the battery to be measured is normal else it meaning that a lowest point of the voltage curve has been reached or passed and the battery to be measured is determined to be abnormal; and
(e) in a result display displaying a result of the calculation in the step (c) on a display, and issuing an alarm if the predetermined alarm value is reached in the step (d);
whereby it is of repeatedly performing the steps (a) to (e) for monitoring the battery to be measured for a long time, thereby informing a driver of a power level of the battery prior to starting an engine by noticing whether an alarm has been issued;
a method of monitoring the motor vehicle'"'"'s electric power in the inner loop sampling circuit comprising the steps of;
(f) in an inner loop sampling;
setting an internal load of the monitor and alarm device as a load, discharging the battery to be measured every T2 second by quickly switching a power transistor for obtaining a sampled voltage, and repeating the discharging N times so as to obtain N sampled voltage values;
(g) in a calculation;
calculating an average voltage and recording the same,(h) in a comparison;
comparing the average voltage obtained in the step (g) with a predetermined alarm value, displaying a result of the comparison in the step (e) on the display, and issuing an alarm if the predetermined alarm value is reached; and
(i) in a time interval of measurement;
measuring an available power of the battery to be measured every T2 second and waiting a predetermined period of time for a next measurement;
whereby it is of monitoring the battery to be measured for a long time by repeating the steps (f) to (i). - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification