JP2001250179A - Gas alarm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas alarm in which its battery rest capacity in accurately grasped and the battery is effectively usable. SOLUTION: The gas alarm which is driven by a battery to detect object gas and perform alarming operation based upon the density of the detected gas is provided with a timer part 4 which measures the detection time of the detected gas and the alarming operation time, a storage part 5 which stores the battery rest capacity, an arithmetic part 6 which calculates the current battery rest capacity from the battery use capacity per detecting operation time of the detected gas, the battery use capacity per alarming operation time, and the mentioned alarming operation time, and a battery rest capacity display part 7 which displays the battery rest capacity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas alarm device for detecting a gas to be detected and performing an alarm operation based on the concentration of the detected gas by driving a battery.

[0002]

2. Description of the Related Art In recent years, with the development of gas detection elements and their low power drive, the use of battery-driven gas detectors has come to be used. In addition, among gas detectors of this type that are used for applications in which a serious failure is expected to occur when the battery runs out, it is conceivable to display the remaining battery capacity (remaining amount). I have. On this occasion,
The remaining battery level may be displayed as the remaining battery level by subtracting the energizing usage time actually used by the gas detector from the battery available time assumed at the time of battery replacement. It is considered. However, among gas detectors of this type, those that enable alarm operation use significantly different amounts of power between normal gas detection operation and alarm operation. It cannot be judged by the usage time.

[0003]

In other words, according to the above-mentioned prior art, it is not possible to accurately determine the time for replacing the battery of the gas alarm device, and the battery runs out during use of the device. In order to avoid the problem, the battery has to be replaced when there is enough time before the battery runs out.Therefore, there is a problem that the battery cannot be used effectively. Is desired.

Accordingly, an object of the present invention is to provide a gas alarm which can accurately grasp the remaining battery level and can be used effectively in view of the above-mentioned drawbacks.

[0005]

According to the present invention, there is provided a gas alarm device for detecting a gas to be detected and performing an alarm operation based on the concentration of the detected gas by driving a battery according to the present invention. A timer unit for measuring the detection operation time and the alarm operation time of the detection gas is provided, a storage unit for storing the remaining battery level is provided, and the battery usage capacity per the detection operation time of the gas to be detected and the alarm operation time per the alarm operation time are provided. Battery operating capacity, and, based on the detection operation time of the gas to be detected and the alarm operation time, provided a calculation unit for obtaining the current battery remaining amount, and a battery remaining amount display unit for displaying the battery remaining amount is provided. is there.

[Effects] That is, since a timer section for measuring the detection operation time and the alarm operation time of the detected gas is provided, the detection operation time for detecting the detection gas and the alarm operation for issuing an alarm are provided. Time can be measured. Also,
A storage unit for storing a remaining battery level (R1) is provided, and a battery usage capacity (A) per detection operation time of the detected gas;
Battery usage capacity per alarm operation time (B), and
If a calculation unit for obtaining a new remaining battery capacity is provided based on the detection operation time (ta) of the detected gas and the alarm operation time (tb), the used amount of the battery becomes the used capacity and the used time. Since R2 can be obtained as a product, for example, R2 can be obtained as the current remaining battery level by obtaining R2 = R1−A · ta−B · tb. If the storage unit stores the initial battery remaining amount, the detection operation time and the alarm operation time may be given as the total operation time from the time of battery replacement, and the storage unit may store the current battery remaining amount. If the amount is stored, the detection operation time and the alarm operation time may be an update time for storing the current remaining battery level in the storage unit,
When the update operation is made different between the detection operation and the alarm operation, various modes can be adopted, such as setting them separately. The current remaining battery level obtained in this way can be displayed on the gas alarm by the battery remaining capacity display section, and it is possible to notify the user of the time to replace the battery. Therefore, the remaining battery level can be determined based on the amount of electric power used instead of simply determining the remaining time of the gas alarm device as in the conventional technology. It becomes more accurate, and the user can accurately judge when to replace the battery. Therefore, in order to avoid the problem of running out of batteries during use of the device, the batteries must be replaced when there is enough time before the batteries run out, and the above-mentioned case that the batteries cannot be used effectively cannot be used. It's hard to derive the problem.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a gas alarm device of the present invention includes a sensor unit 1 in which a gas detection element is incorporated in a gas detection circuit, and a detection target gas in a detection target gas which receives an output signal from the sensor unit 1. And a detection operation unit 2 that knows the concentration of the target gas. The output signal detected by the detection operation unit 2 determines that the concentration of the gas to be detected in the detection target gas has reached the alarm concentration that requires an alarm. In this case, an alarm unit 3 is provided to generate an alarm sound or the like in the event that the detected gas is present in the surroundings at an alarm concentration or higher.

Further, the detection operation section 2 and the alarm section 3
Is provided with a timer unit 4 for measuring the operation time, and based on the battery remaining amount information from the storage unit 5 for storing the battery remaining amount and the operating time information from the timer unit 4, An arithmetic unit 6 for calculating the remaining amount is provided. further,
A battery remaining amount display unit 7 is provided, and the calculation result by the calculation unit 6 is displayed in real time.

Hereinafter, an example of a procedure for calculating the remaining battery charge of the arithmetic unit 6 in the gas alarm device of the present invention will be described with reference to a flowchart.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG.
The current battery level is calculated for each battery. # 1 First, the current remaining battery level is displayed, and the operation state of the alarm unit 3 is checked every time (k). # 2 When the alarm unit is operating, an alarm flag indicating that the alarm unit 3 has been operated is set, and the duration of the alarm sound is integrated. # 3 If the alarm is not activated, check for the presence of an alarm flag. If there is no alarm flag, (Battery used capacity per detection operation time of the gas to be detected (A)) × k is subtracted from the displayed remaining battery level, and the current remaining battery level is set to # 1. Return. (Decrease in battery remaining amount due to detection operation) If there is an alarm flag, the remaining battery in the display of (Battery usage per alarm operation time (B)) x (duration of alarm sound integrated in # 2) Subtract from the quantity. Thereafter, the duration of the alarm sound is cleared, the alarm flag is reset, and the process returns to # 1 as the current remaining battery level. (Subtraction of battery remaining amount by alarm operation) As a result, the current battery remaining amount is updated in the storage unit, the amount of used electricity is accurately reflected on the battery remaining amount, and the time for battery replacement is changed. Can now be determined accurately.

[Brief description of the drawings]

FIG. 1 is a block diagram of an alarm device according to the present invention.

FIG. 2 is a flowchart showing a calculation process of a calculation unit used in the alarm device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sensor part 2 Detection operation part 3 Alarm part 4 Timer part 5 Storage part 6 Calculation part 7 Battery remaining amount display part

Claims (1)

[Claims] 1. A gas alarm device for detecting a detected gas and performing an alarm operation based on the concentration of the detected gas by driving a battery, wherein the timer measures a detection operation time and an alarm operation time of the detected gas. A storage unit for storing a remaining battery capacity, a battery usage capacity per detection operation time of the detected gas, a battery usage capacity per alarm operation time, and a detection operation time of the detection gas And a calculating unit for calculating a current remaining battery capacity based on the alarm operation time, and a battery remaining capacity display unit for displaying the remaining battery capacity is provided.