JPH09210936A - Gas sensing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To embody a gas sensing device simply by equipping a compensation temp. sensing means to prepare the compensation temp. data for different types of gas sensors, furnishing a calculating means to prepare the post-compensation temp. variation data upon conducting a temp. compensation for the temp. variation data for each type of sensing gas, and producing alarm command data in compliance with the type of the applicable sensing gas. SOLUTION: A compensation temp. sensing means 11A prepares the compensation temp. data 11a for conducting temp. compensation for different types of gas sensors 12A-12N, while a calculating means 13 makes temp. compensation of the temp. variation data 12a, 12b using the compensation temp. data 11a. Alarm command data 13a according to the type of the sensing gas is prepared when the post-compensation temp. variation data 15a-15n for the temp. variation data 12a or 12b attain the compensation temp. data 11a. This enables temp. compensation using a single means 11A irrespective of the number of gas sensor types, and the device can be constructed simply.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas detection device, and more particularly to a gas detection device capable of notifying a warning that the gas concentration has become abnormal when the gas concentration of a predetermined type of gas exceeds the warning concentration. It relates to a detection device.

[0002]

2. Description of the Related Art Conventionally, as this type of gas detector 9,
For example, there is one as shown in FIG. Such a gas detection device 9 gives an alarm indicating that the gas concentration becomes abnormal when the gas concentration of a predetermined type of gas (for example, carbon monoxide gas, methane gas) exceeds the alarm concentration. Therefore, at least one type of gas sensor (for example, carbon monoxide gas sensor, methane gas sensor) 4 for detecting gas concentration, and compensation for generating a compensation temperature value for executing temperature compensation of each type of gas sensor 4 Temperature detecting means 2
The temperature compensation of the temperature fluctuation value for each detection gas is executed to generate the post-compensation temperature fluctuation value for each temperature fluctuation value, and the temperature fluctuation value after compensation reaches the preset alarm concentration for each detection gas. In this case, the calculation means 3 for generating an alarm command for prompting the generation of an alarm corresponding to each type of detected gas is provided.

At least one type of gas sensor (eg,
Since the output level of the carbon monoxide gas sensor and the methane gas sensor 4 varies depending on the environmental temperature, it is necessary to individually perform temperature compensation according to the type of gas sensor.
Therefore, the individual temperature compensation compensators according to the type of the gas sensor 4 are provided with the compensation temperature value generated by the compensation temperature detecting means 2 individually installed corresponding to the type of the gas sensor 4, for example, depending on the type of gas. It was executed by substituting it into a compensation formula or a compensation graph.

Further, the comparison unit 3A installed in the calculation means 3
Is a temperature variation value after compensation for each temperature variation value by performing temperature compensation of each temperature variation value (voltage input to the negative terminal of the comparison unit 3A, that is, in FIG. 3 by the resistance element R). Generated voltage) and alarm concentration preset for each detection gas (voltage input to the plus terminal of the comparison unit 3A, that is, in FIG. 3, generated by two resistance elements R1 and R2. (There is a comparison of magnitudes), and when a predetermined magnitude relationship is established (that is, when the temperature fluctuation value after compensation reaches the alarm concentration).
I was urging an alarm to be issued.

The alarm generated by the computing means 3 is executed by sounding a buzzer (B in the figure).

[0006]

However, in such a conventional gas detecting device 9, the individual temperature compensation according to the type of the gas sensor 4 (for example, a compensating formula or compensating graph depending on the type of gas is used). There is a problem in that it is necessary to individually provide the compensation temperature detecting means 2 in accordance with the type of the gas sensor 4 in order to execute the above (execution).

Therefore, when the number of types of the gas sensor 4 is increased or decreased, there is a problem that the number of the compensation temperature detecting means 2 needs to be increased or decreased according to the increase or decrease of the gas sensor 4.
The present invention has been made by paying attention to such conventional problems, and a compensation temperature detecting means capable of generating compensation temperature data for executing temperature compensation of each type of gas sensor,
It is possible to perform temperature compensation of the temperature variation value data for each detection gas and generate post-compensation temperature variation value data for each temperature variation value data based on the compensation temperature data, and are stored and held in advance for each detection gas. The number of gas sensor types can be reduced by installing a calculation means that can generate alarm command data to prompt the generation of an alarm according to the type of detected gas when the temperature fluctuation value data after compensation reaches the alarm concentration. A gas detection device capable of temperature compensation of a gas sensor by a single compensation temperature detection means without being affected, that is, it is not necessary to individually provide compensation temperature detection means corresponding to the type of gas sensor, and a gas sensor It is an object of the present invention to provide a gas detection device in which it is not necessary to increase or decrease the number of compensation temperature detection means according to the increase or decrease of the types.

[0008]

Means for achieving the object are as follows. [1] Item It is possible to detect the gas concentration for a predetermined type of gas,
It is provided with at least one type of gas sensor (12A, ..., 12N) capable of generating temperature fluctuation value data (12a, ..., 12n) according to the gas concentration for each of the detection gases, and the gas concentration of the detection gas is A gas detector (10) capable of issuing an alarm indicating that the gas concentration has become abnormal when the concentration exceeds the alarm concentration, and temperature compensation of the gas sensors (12A, ..., 12N) for each type. A gas detection device (10), comprising: a compensation temperature detecting means (11A) capable of generating compensation temperature data (11a) for executing the above.

[2] Item The gas concentration for a predetermined type of gas can be detected,
It is provided with at least one type of gas sensor (12A, ..., 12N) capable of generating temperature fluctuation value data (12a, ..., 12n) according to the gas concentration for each of the detection gases, and the gas concentration of the detection gas is A gas detector (10) capable of issuing an alarm indicating that the gas concentration has become abnormal when the concentration exceeds an alarm concentration, wherein the temperature fluctuation value data (12a, ..., 12n) for each of the detected gases is provided. ) Of the temperature fluctuation value data (12a, ..., 12)
n) temperature data after compensation (15a, ..., 15)
n) can be generated based on the compensation temperature data (11a), and the post-compensation temperature variation value data (1) is added to the alarm concentration previously stored and held for each detection gas.
5a, ..., 15n) has reached, it comprises an arithmetic means (13) capable of generating alarm command data (13a) for prompting the generation of the alarm corresponding to each type of the detected gas. A characteristic gas detection device (10).

[3] Item The gas concentration for a predetermined type of gas can be detected,
It is provided with at least one type of gas sensor (12A, ..., 12N) capable of generating temperature fluctuation value data (12a, ..., 12n) according to the gas concentration for each of the detection gases, and the gas concentration of the detection gas is A gas detector (10) capable of issuing an alarm indicating that the gas concentration has become abnormal when the concentration exceeds the alarm concentration, and temperature compensation of the gas sensors (12A, ..., 12N) for each type. Temperature compensation means (11A) capable of generating compensation temperature data (11a) for executing the temperature compensation and temperature compensation of the temperature fluctuation value data (12a, ... The compensated temperature variation value data (15a, ..., 15n) for each variation value data (12a, ..., 12n) can be generated on the basis of the compensation temperature data (11a), and the compensation temperature variation value data (15a, ... The compensated temperature varies with the alarm concentration stored value held data (15a, ..., 15
When n) is reached, it comprises an arithmetic means (13) capable of generating alarm command data (13a) for prompting the generation of the alarm according to the type of the detected gas. Gas detector (10).

Item [4] A gas detector (10) capable of issuing an alarm indicating that the gas concentration is abnormal when the gas concentration of a predetermined type of gas exceeds the alarm concentration. It is possible to detect the gas concentration for a predetermined type of gas, and temperature variation value data (12a, ..., 12) corresponding to the gas concentration for each of the detected gases.
n), and at least one type of gas sensor (12A, ..., 12N), and compensation temperature data (11a) for executing temperature compensation of each type of gas sensor (12A, ..., 12N). Possible compensation temperature detecting means (11A) and temperature compensation of the temperature variation value data (12a, ..., 12n) for each detection gas are executed to compensate each temperature variation value data (12a, ..., 12n). The post-temperature fluctuation value data (15a, ..., 15n) can be generated based on the compensation temperature data (11a), and the post-compensation temperature fluctuation value is stored in the alarm concentration stored in advance for each detection gas. An arithmetic means (13) capable of generating alarm command data (13a) for prompting the generation of the alarm corresponding to each type of the detected gas when the data (15a, ..., 15n) has arrived, Comprising characterized by comprising [1] section to [3] gas detection apparatus according to claim (10).

[5] Item [2], [3], or [4] The calculating means (13) described in the item [13] is an alarm concentration storage in which the alarm concentration for each gas of a predetermined type is stored in advance. A gas detector (10) comprising a part (13A).

[6] Item A gas detecting device (10), wherein the alarm concentration for each of the predetermined types of gas in the alarm concentration storage unit (13A) according to item [5] can be rewritten at any time.

Item [7] The compensation temperature detecting means (11A) includes a thermistor capable of measuring the gas temperature of each detection gas for generating the compensation temperature data (11a) of each detection gas. The gas detector (10) according to any one of items [4] to [6].

Item [8] Alarm command data (13a) for prompting the generation of the alarm.
The gas detection device (10) according to any one of items [1] to [7], further comprising alarm means (14) capable of issuing the alarm.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 (a) or FIG. 1 (b) is a functional block diagram showing a gas detection device (10) according to an embodiment of the present invention, and FIG. 1 (c) is a gas detection device according to an embodiment of the present invention. FIG. 3 is an electric circuit diagram showing a device (10).

First, the main structure of the gas detector (10) of the embodiment of the invention will be described. The gas detection device (10) of the embodiment of the present invention is capable of detecting the gas concentration for a predetermined type of gas, and when the gas concentration of the detected gas at this time exceeds the alarm concentration, It is possible to give an alarm indicating that the gas concentration has become abnormal. As shown in FIGS. 1 (a) to 1 (c), the compensation temperature detecting means (11A) and the gas sensors (12A, ..., 12N). The calculation means (13) and the alarm means (14) are provided as main parts.

The alarm concentration is individually set based on the type of predetermined gas. The predetermined type of gas mainly means a gas that adversely affects human body such as gas poisoning, and specifically, methane gas, carbon monoxide gas, carbon dioxide gas,
It means gas such as propane gas and city gas.

The alarm in the embodiment of the present invention means that the gas concentration is equal to or higher than the alarm concentration (for example, the concentration at which there is a risk of adversely affecting the human body such as gas poisoning, or 1/4 of the lower explosion limit). , As a result, there is a risk that the human body may be adversely affected by gas poisoning, etc.
It means an alarm indicating that / 4 has been reached (hereinafter referred to as the previous alarm). It should be noted that in the alarm according to the embodiment of the present invention, the concentration of the gas is further increased despite the notification of the previous alarm, and the human body is more seriously adversely affected than the previous alarm concentration level. It is also possible to notify an alarm indicating that there is a danger that the human body will be adversely affected, which is more serious than the previous alarm level, when the concentration becomes higher than the concentration at which the danger occurs.

Next, the configuration of the compensation temperature detecting means (11A) according to the embodiment of the invention will be described. Compensation temperature detecting means (1
1A), as shown in FIGS. 1A to 1C, is capable of generating compensation temperature data (11a) for executing temperature compensation of each type of gas sensor (12A, ..., 12N). , And is connected to a computing means (13).

The compensation temperature detecting means (11A) is shown in FIG.
As shown in (c), the thermistor (T in FIG. 1C) for generating the voltage V1 (that is, determining the compensation temperature).
h) and a resistance element (R in FIG. 1C). Next, the gas sensor (12A,
, 12N) will be described.

At least one type of gas sensor (12A,
, 12N) is capable of detecting the gas concentration for a predetermined type of gas, as shown in FIGS. 1A to 1C, and temperature fluctuation value data corresponding to the gas concentration for each detected gas at this time. (12a, ..., 12n) are respectively connected to the computing means (13).

Specifically, at least one gas sensor (12A) of one kind can be used as shown in FIG. 1A, and a plurality of gas sensors (12A) can be used as shown in FIG. 1B. , ..., 12N) can be used. Gas sensor (12A, ..., 12)
N) specifically means methane gas, carbon monoxide gas,
It means a gas sensor that can detect gases such as carbon dioxide gas, propane gas, and city gas, and can be achieved by means such as a semiconductor gas sensor.

The predetermined type of gas mainly means a gas that has a bad effect on the human body such as gas poisoning.
It means a gas such as methane gas, carbon monoxide gas, carbon dioxide gas, propane gas, city gas. The semiconductor gas sensor is composed of a transformer for transforming a commercial power source, a temperature-sensitive semiconductor made of metal oxide, a heater, a detection electrode, and the like.

In the semiconductor gas sensor, the temperature-sensitive semiconductor is heated to a predetermined temperature by passing an alternating current through the heater, and the resistance value between the heater and the detection electrode changes according to the concentration of the temperature-sensitive semiconductor in a reducing gas atmosphere. Then, a current corresponding to that is passed. Further, at this time, an alternating current flows in the semiconductor gas sensor according to a change in resistance value, and this alternating current is converted into an alternating voltage by a current-voltage conversion resistor to generate a gas sensor (12A, ..., 12N). It is configured.

Such a gas sensor (12A, ..., 12)
By using N), when the gas concentration increases,
The resistance value of the semiconductor gas sensor decreases, and the current flowing through the gas sensor (12A, ..., 12N) increases,
Along with this, the voltage at the connection point between the gas sensor (12A, ..., 12N) and the current-voltage conversion resistor rises. And
When the gas concentration increases beyond the alarm point, the calculation means (1
The voltage applied to 3) becomes higher than the compensation temperature, and the alarm command data (13a) is output from the output of the calculating means (13). As a result, warning means (that is, FIG.
The buzzer B in (c) and (14) start ringing, and it becomes possible to warn of a gas leak or the like.

Next, the calculating means (1
The configuration of 3) will be described. The calculation means (13) is shown in FIG.
As shown in (a) to (c), temperature compensation of the temperature variation value data (12a, ..., 12n) for each detected gas is executed, and the temperature variation value data (12a, ..., 12n) at this time is calculated. , 15n after compensation temperature variation value data can be generated based on the compensation temperature data (11a), the compensation temperature detecting means (11A) and the gas sensors (12A, ..., 15n).
12N) and an alarm means (14).

Further, when the compensated temperature variation value data (15a, ..., 15n) at this time reaches the alarm concentration stored and held in advance for each detected gas at this time, each type of detected gas at this time Compensating temperature detecting means (11A) and gas sensors (12A, ..., 12N) so that alarm command data (13a) for prompting the generation of an alarm according to
And an alarm means (14).

The computing means (13) is capable of collecting data from the controlled object according to a program, executing optimum control of the controlled object based on the collected data, and displaying a control process, an alarm, etc. Specifically, it is a one-chip microprocessor, and specifically, an A / D input unit for collecting data from a control target, various judgments according to a program, and a main part for controlling the control target. The main part is constituted by means such as a microprocessor, a D / A output section for driving the alarm means (14) and the like, and a memory for holding programs and various set values.

Next, the configuration of the alarm concentration storage section (13A) according to the embodiment of the invention will be described. Alarm concentration storage (13
As shown in FIGS. 1 (a) to 1 (c), (A) is installed in the calculating means (13) so that the calculating means (13) can previously store and hold the alarm concentration for each gas of a predetermined type. There is.

The alarm density storage section (13A) means a storage means that can be rewritten at any time, and more specifically, EE.
It can be realized by various storage means such as a semiconductor storage device such as a PROM, a magnetic storage means such as a magnetic disk, and a magneto-optical storage means such as an MO. It should be noted that it is common technical knowledge for a person skilled in the art at this point in time that the reference set value storage unit (13A) can realize the embodiment of the present invention even if it is provided outside the calculation unit (13).

Next, the alarm means (1 according to the embodiment of the invention
The configuration of 4) will be described. The alarm means (14) is shown in FIG.
As shown in (a) to (c), it is connected to the computing means (13) so that the alarm can be generated according to the alarm command data (13a) for prompting the alarm generation.

The specific alarm means (14) is capable of issuing an alarm in accordance with the alarm command data (13a) for prompting the alarm generation. Specifically, FIG. )
As shown in FIG. 7, sounding means such as a buzzer (B in the figure) connected to a driving element (Tr: transistor in the figure), visual confirmation means such as a lamp, a patrol light, an alarm display, etc. Various means using light can be used.

Next, the operation of the embodiment of the invention will be described. FIG. 2 is a flowchart for explaining the operation of the gas detection device (10) according to the embodiment of the present invention. First, the gas detection device (10) of the embodiment of the invention
The main operation of is explained.

The gas detector (1 according to the embodiment of the present invention
0) is capable of detecting the gas concentration for a predetermined type of gas, and when the gas concentration of the detected gas at this time becomes equal to or higher than the alarm concentration, an alarm indicating that the gas concentration at this time becomes abnormal is issued. It is possible. The alarm concentration in the embodiment of the present invention is individually set based on the type of the predetermined gas.

The predetermined type of gas mainly means a gas having an adverse effect on human body such as gas poisoning or an explosive gas, and specifically, methane gas, carbon monoxide gas, carbon dioxide gas, propane gas, city It means a gas like gas. The alarm in the embodiment of the present invention means that the gas concentration is an alarm concentration (for example, a concentration at which there is a risk of adversely affecting the human body such as gas poisoning or a lower limit of explosion).
As described above, it means an alarm (hereinafter referred to as the previous alarm) indicating that there is a risk that the human body is adversely affected by gas poisoning or the like. It should be noted that in the alarm according to the embodiment of the present invention, the concentration of the gas is further increased despite the notification of the previous alarm, and the human body is more seriously adversely affected than the previous alarm concentration level. When the concentration exceeds the danger level, an alarm indicating that there is a danger that the human body will be adversely affected, which is more serious than the previous alarm level, or that the lower explosion limit has been reached Is also possible.

As a result, the gas sensors (12A, ..., 1)
The temperature compensation of the gas sensors (12A, ..., 12N) can be performed by a single compensation temperature detection means without being affected by the number of types of 2N), and the simplicity of the apparatus can be realized. That is, it is not necessary to individually provide the compensation temperature detecting means (11A) corresponding to the types of the gas sensors (12A, ..., 12N), and the simplicity of the device can be realized.

Further, even if the types of the gas sensors (12A, ..., 12N) are increased or decreased, it is not necessary to increase or decrease the number of compensation temperature detecting means according to the increase or decrease, and the simplicity of the apparatus can be realized. More specifically, the electric circuit diagram of FIG. 1C and FIG.
The operation of the gas detector (10) according to the embodiment of the present invention will be described with reference to the flowchart of FIG.

The calculating means (specifically, a one-chip microprocessor) (13) is a gas sensor (FIG. 1C).
Temperature fluctuation value data (Fig. 1 (c))
12a) (that is, V2 in FIG. 1C) is input from the input terminal P3 (step S1).

At this time, temperature fluctuation value data (12a in FIG. 1C) input from the input terminal P3 (that is, FIG.
V2 in (c) is converted into digital data by the A / D input section of the calculating means (13) (step S).
1). Similarly, the calculation means (13) is a gas sensor (see FIG.
Temperature fluctuation value data (Fig. 1) generated by 12B in (c)
12b in (c) (that is, V3 in FIG. 1C) is input from the input terminal P1 (step S1).

At this time, temperature fluctuation value data (12b in FIG. 1C) input from the input terminal P1 (that is, FIG.
V3 in (c) is converted into digital data by the A / D input section of the calculating means (13) (step S).
1). Next, the calculation means (13) calculates the compensation temperature data (11
a) (that is, V1 in FIG. 1C) is input from the input terminal P4 (step S2).

At this time, the compensation temperature data (11a) input from the input terminal P4 is converted into digital data by the A / D input section of the calculating means (13) (step S1). Next, the calculation means (13) uses the compensation temperature data (11a) generated in step S2 to perform step S1.
Temperature compensation of the temperature fluctuation value data (12a, 12b) generated in step S3 is executed (step S3).

Next, the calculation means (13) determines whether or not an alarm should be issued, and the temperature variation value data (that is, FIG.
When the compensated temperature fluctuation value data (15a, ..., 15n) for each V2 or V3 (12a or 12b) in (c) reaches the compensated temperature data (11a), for each type of detection gas at this time The alarm command data (13a) for prompting the generation of the corresponding alarm is generated (step S4).

After that, the timer operation for the predetermined time t is executed (step S5), and after the result of the predetermined time t, the process returns to step S1 and step S2 to continue the gas concentration input process and the temperature input process. Next, the operation of the compensation temperature detecting means (11A) according to the embodiment of the invention will be described.

The compensation temperature detecting means (11A) is shown in FIG.
As shown in (a) to (c), it is possible to generate compensation temperature data (11a) for performing temperature compensation of the gas sensors (12A, ..., 12N) of each type. The compensating temperature detecting means (11A) including a thermistor (Th in FIG. 1C) and a resistance element (R in FIG. 1C) is shown in FIG.
As shown in (c), the voltage V1 (that is, the compensation temperature is determined) is generated.

By installing such compensation temperature detecting means (11A), the gas sensors (12A, ..., 12)
The temperature compensation of the gas sensors (12A, ..., 12N) can be performed by a single compensation temperature detection means without being affected by the number of N) types, and the simplicity of the device can be realized.

In other words, the gas sensor (12A, ..., 12N)
It is not necessary to individually provide the compensation temperature detecting means (11A) according to the type, and the simplicity of the device can be realized. Further, even when the types of the gas sensors (12A, ..., 12N) are increased or decreased, it is not necessary to increase or decrease the number of compensation temperature detecting means according to the increase or decrease, and the simplicity of the device can be realized.

Next, the gas sensor (1
2A, ..., 12N) will be described. At least one type of gas sensor (12A, ..., 12N) is shown in FIG.
As shown in (c), it is possible to detect the gas concentration with respect to a predetermined type of gas, and temperature variation value data (12a, ..., 12n) corresponding to the gas concentration for each detected gas at this time,
Specifically, 12A and 12B in FIG. 1C can be generated.

In the semiconductor gas sensor, the temperature-sensitive semiconductor is heated to a predetermined temperature by passing an alternating current through the heater, and the resistance value between the heater and the detection electrode changes according to the concentration of the temperature-sensitive semiconductor in a reducing gas atmosphere. Then, a current corresponding to that is passed. Further, at this time, an alternating current corresponding to a change in the resistance value flows through the semiconductor gas sensor, and this alternating current is converted into an alternating voltage by the current-voltage conversion resistor to generate the gas sensor (12A, ..., 12N). it can.

Such a gas sensor (12A, ..., 12)
By using N), when the gas concentration increases,
The resistance value of the semiconductor gas sensor decreases, and the current flowing through the gas sensor (12A, ..., 12N) increases,
Along with this, the voltage at the connection point between the gas sensor (12A, ..., 12N) and the current-voltage conversion resistor rises. And
When the gas concentration increases beyond the alarm point, the voltage applied to the calculation means (specifically, the one-chip microprocessor) (13) causes the voltage applied to the compensation temperature (that is, V in FIG. 1C).
The alarm command data (13a) is output from the output of the calculating means (13). As a result, the alarm means (that is, the buzzer B in FIG. 1C) (14) starts ringing to warn of a gas leak or the like.

Such a gas sensor (12A, ..., 12)
By using N), when the gas concentration increases,
The resistance value of the semiconductor gas sensor decreases, and the current flowing through the gas sensor (12A, ..., 12N) increases,
Along with this, the voltage at the connection point between the gas sensor (12A, ..., 12N) and the current-voltage conversion resistor rises. And
When the gas concentration increases beyond the alarm point, the voltage applied to the arithmetic means (specifically, the one-chip microprocessor) (13) causes the compensation temperature (that is, V in FIG.
1)), and the alarm command data (13a) is output from the output of the calculating means (13). As a result, warning means (that is, buzzer B in FIG. 1C) (14)
Will start ringing and will be able to warn of gas leaks.

Next, the calculating means (1
The operation 3) will be described. An arithmetic means (specifically, a one-chip microprocessor) (13) collects data from the controlled object according to a program, executes optimal control of the controlled object based on the collected data, and executes a control process, an alarm, etc. Can be displayed.

The calculation means (13) performs temperature compensation of the temperature variation value data (12a, ..., 12n) and the temperature variation value data at this time (that is, V2, V in FIG. 1C).
3) The compensated temperature variation value data (15a, ..., 15n) for each (12a, ..., 12n) is converted into the compensated temperature data (11a).
Can be generated based on.

Further, when the compensated temperature fluctuation value data (15a, ..., 15n) at this time reaches the alarm concentration stored and held in advance for each detection gas at this time, each type of detection gas at this time It is possible to generate alarm command data (13a) for prompting the generation of an alarm according to the above.

The calculation means (specifically, a one-chip microprocessor) (13) collects data from the controlled object according to a program, executes optimal control of the controlled object based on the collected data, and It is a device that can display an alarm or the like (specifically, a one-chip microprocessor).

Thus, specifically, the A / D input section can collect data from the controlled object, and the microprocessor can execute various judgments according to the program and control the controlled object. The / A output section can drive the alarm means (14) and the like, and the memory means can hold programs and various set values.

By providing such a calculating means (13), the gas sensor (12A, ..., 12N) can be operated by a single compensation temperature detecting means without being influenced by the number of kinds of the gas sensor (12A, ..., 12N). Temperature compensation of
The simplicity of the device can be realized. That is, the gas sensor (12
It is not necessary to individually provide the compensation temperature detecting means (11A) corresponding to the types of A, ..., 12N), and the simplicity of the device can be realized.

Further, even when the types of the gas sensors (12A, ..., 12N) are increased or decreased, it is not necessary to increase or decrease the number of compensation temperature detecting means according to the increase or decrease, and the simplicity of the apparatus can be realized. Next, the operation of the alarm concentration storage unit (13A) according to the embodiment of the invention will be described.

The alarm concentration storage section (13A) has a calculation means (specifically, a one-chip microprocessor) (1
In 3), the alarm concentration for each predetermined type of gas can be stored and held in advance. The alarm concentration storage section (13A) is rewritable at any time, and is specifically realized by various storage means such as a semiconductor storage device such as an EEPROM, a magnetic storage means such as a magnetic disk, a magnetic optical storage means such as an MO. can do.

By installing such an alarm concentration storage unit (13A), the gas sensors (12A, ..., 12N)
The temperature of the gas sensors (12A, ..., 12N) can be compensated by a single compensation temperature detecting means without being affected by the number of types of the above, and the simplicity of the device can be realized.

That is, the gas sensor (12A, ..., 12N)
It is not necessary to individually provide the compensation temperature detecting means (11A) according to the type, and the simplicity of the device can be realized. Further, even when the types of the gas sensors (12A, ..., 12N) are increased or decreased, it is not necessary to increase or decrease the number of compensation temperature detecting means according to the increase or decrease, and the simplicity of the device can be realized.

Next, the alarm means (1 according to the embodiment of the invention
The operation 4) will be described. The alarm means (14) can generate an alarm according to the alarm command data (13a) for prompting the alarm to be generated. The specific alarm means (14) is capable of issuing an alarm in accordance with the alarm command data (13a) for prompting the alarm to be generated, and is specifically shown in FIG. 1 (c). As described above, sounding means such as a buzzer (B in the figure) connected to a driving element (Tr: transistor in the figure), visual confirmation means such as a lamp, a patrol light, an alarm display, etc. Various means used can be used.

Specifically, as shown in FIG. 1C, a sounding means such as a buzzer (B in the drawing) connected to a driving element (Tr: a transistor in the drawing), a lamp, a patrol light, an alarm display, or the like. Various means using an alarm sound (including sound) or light such as visual recognition means can be used.

As described above, according to the gas detector (10) of the embodiment of the present invention, the gas sensor (1
2A, ..., 12N) is not affected by the number of types of gas sensors (12A, ..., 12) by a single compensation temperature detecting means.
The temperature compensation of N) is possible, and the simplicity of the device can be realized.

In other words, the gas sensor (12A, ..., 12N)
It is not necessary to individually provide the compensation temperature detecting means (11A) according to the type, and the simplicity of the device can be realized. Further, even when the types of the gas sensors (12A, ..., 12N) are increased or decreased, it is not necessary to increase or decrease the number of compensation temperature detecting means according to the increase or decrease, and the simplicity of the device can be realized.

[0066]

According to the gas detector of the present invention,
Compensation temperature detection means capable of generating compensation temperature data for performing temperature compensation of each type of gas sensor, and temperature compensation of temperature variation value data for each detected gas to perform post-compensation temperature for each temperature variation value data. The fluctuation value data can be generated based on the compensation temperature data, and when the temperature fluctuation value data after compensation reaches the alarm concentration stored and held in advance for each detected gas, an alarm corresponding to each kind of detected gas is generated. By equipping a calculation means capable of generating alarm command data for prompting the generation, the temperature of the gas sensor can be compensated by a single compensation temperature detection means without being affected by the number of types of gas sensors, and the device is simple. Can be realized.

In other words, it is not necessary to individually provide compensation temperature detecting means corresponding to the type of gas sensor, and even when the type of gas sensor is increased or decreased, the number of compensation temperature detecting means is increased or decreased according to the increase or decrease. It becomes unnecessary and the simplicity of the device can be realized.

[Brief description of drawings]

FIG. 1 (a) or FIG. 1 (b) is a functional block diagram showing a gas detector according to an embodiment of the present invention, and FIG. 1 (c) is a gas according to an embodiment of the present invention. It is an electric circuit diagram which shows a detection device.

FIG. 2 is a flowchart for explaining the operation of the gas detection device according to the embodiment of the present invention.

FIG. 3 is an electric circuit diagram showing a conventional gas detection device.

[Explanation of symbols]

 10 Gas Detector 11A Compensation Temperature Detection Means (Thermistor) 11a Compensation Temperature Data 12A, ..., 12N Gas Sensors 12a, ... 15n Temperature fluctuation value data after compensation

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 28, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

Claims (8)

[Claims] 1. At least one type of gas sensor capable of detecting a gas concentration for a predetermined type of gas and capable of generating temperature variation value data according to the gas concentration for each of the detected gases. A gas detection device capable of issuing an alarm indicating that the gas concentration has become abnormal when the gas concentration of the gas becomes equal to or higher than the alarm concentration, for performing temperature compensation of the gas sensor for each type. A gas detection device comprising: a compensation temperature detecting means capable of generating compensation temperature data. 2. A gas sensor comprising at least one gas sensor capable of detecting a gas concentration for a predetermined type of gas and capable of generating temperature fluctuation value data according to the gas concentration for each of the detected gases. A gas detection device capable of issuing an alarm indicating that the gas concentration has become abnormal when the gas concentration of the gas exceeds an alarm concentration, wherein temperature compensation of the temperature fluctuation value data for each of the detected gases is performed. It is possible to execute and generate post-compensation temperature variation value data for each temperature variation value data based on the compensation temperature data, and the post-compensation temperature variation for the alarm concentration previously stored and held for each detection gas. A gas detecting device, comprising: an arithmetic unit capable of generating alarm command data for prompting the generation of the alarm corresponding to each type of the detected gas when the value data is reached. 3. A gas sensor comprising at least one type of gas sensor capable of detecting a gas concentration for a predetermined type of gas and capable of generating temperature fluctuation value data according to the gas concentration for each of the detected gases. A gas detection device capable of issuing an alarm indicating that the gas concentration has become abnormal when the gas concentration of the gas becomes equal to or higher than the alarm concentration, for performing temperature compensation of the gas sensor for each type. Compensation temperature detecting means capable of generating compensation temperature data, and performing temperature compensation of the temperature variation value data for each of the detected gases to generate post-compensation temperature variation value data for each temperature variation value data based on the compensation temperature data. Of the detected gas when the temperature fluctuation value data after compensation reaches the alarm concentration that is stored and held in advance for each detected gas. Gas detection device for the generation capable calculating means alarm instruction data for prompting the generation of, characterized in that it comprises a. 4. A gas detection device capable of issuing an alarm indicating that the gas concentration has become abnormal when the gas concentration of the predetermined type gas exceeds an alarm concentration, wherein At least one type of gas sensor capable of detecting the gas concentration and capable of generating temperature variation value data according to the gas concentration for each of the detected gases, and compensation for executing temperature compensation of the gas sensor of each type Compensation temperature detection means capable of generating temperature data, temperature compensation of the temperature variation value data for each detection gas is performed, and post-compensation temperature variation value data for each temperature variation value data is based on the compensation temperature data. It can be generated, and when the alarm concentration stored in advance for each detection gas reaches the alarm concentration data after compensation, the alarm corresponding to each type of the detection gas is generated. Gas detector according to claim 1 to 3, characterized in that it comprises a calculating means capable of generating an alarm instruction data for prompting the raw. 5. The gas detection device according to claim 2, 3 or 4, further comprising: a compensation temperature generation unit in which alarm concentrations for each gas of a predetermined type are stored and held in advance. apparatus. 6. The gas detection device according to claim 5, wherein the alarm concentration for each of the predetermined types of gas in the compensation temperature generation unit can be rewritten at any time. 7. The compensation temperature detecting means comprises a thermistor capable of measuring the gas temperature of each detection gas for generating the compensation temperature data of each detection gas. The gas detection device according to claim 4. 8. The gas detection device according to claim 1, further comprising an alarm unit capable of generating the alarm in response to alarm command data for prompting the alarm to be generated.