JP2007132701A - Gas detector calibrating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas detector calibrating device capable of easily performing necessary renewal processing such as gas calibration processing or the like of a portable gas detector. <P>SOLUTION: The gas detector calibrating device renews the suction type portable gas detector having a built-in gas sucking means, and comprises a gas flow channel for introducing gas for renewal processing into the portable gas detector and a recessed part for mounting the gas detector to which the portable gas detector is mounted. The portable gas detector set in an ON state of the power supply is mounted to the recessed part for mounting the gas detector and is connected to the gas flow channel, thereby performing the renewal processing including confirmation test processing of the portable gas detector, gas calibration processing, and charge processing. In the confirmation test processing and gas calibration processing, the gas for renewal processing is introduced into the portable gas detector by the gas sucking means built in the portable gas detector. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a gas detector calibration apparatus, and more specifically, for a suction type portable gas detector, for example, the test process and gas calibration process of a gas sensor and the charging process of a driving battery are included next time. The present invention relates to a gas detector calibration apparatus that performs an update process necessary for using a portable gas detector.

  In general, for example, in underground construction sites, tunnels, and other work sites where dangerous gases such as carbon monoxide gas and hydrogen sulfide gas are contained in the environment atmosphere, oxygen in the environment atmosphere There are many cases where the environmental atmosphere may be dangerous to humans or may be dangerous, such as when the gas concentration is low. When a dangerous gas is contained in the environmental atmosphere, or when the concentration of oxygen gas is low, it becomes necessary to immediately know that the situation is dangerous to humans.

  Currently, at work sites, for example, it has a function of recording gas detector information such as the concentration change of the detection target gas, and a portable gas detector that is carried and used by a person in the work area uses an environmental atmosphere. For example, a gas detection operation for detecting the concentration of oxygen gas, combustible gas, carbon monoxide gas, hydrogen sulfide gas, or the like is performed.

For this type of portable gas detector, after the gas detection operation is completed, for example, after the end of the day's work, the battery charging process and the gas sensor confirmation test process or the gas calibration process performed as necessary will be performed next time. An update process for using the gas detector is performed.
A cradle having a communication function, a charging function, and a gas calibration function has been proposed as a device used when performing an update process for a portable gas detector (see, for example, Patent Document 1).

However, this cradle performs an update process using, for example, a diffusion type portable gas detector that does not incorporate a gas suction means as an object to be processed, and the diffusion type portable gas detector is supplied with an update process gas. In order to supply, there is a problem that an independent dedicated gas suction means must be attached to the cradle, and the operation becomes complicated.
JP 2002-116169 A

An object of the present invention is to provide a gas detector calibration device that can easily perform a required update process such as a gas calibration process for a suction-type portable gas detector having a built-in gas suction means.
Another object of the present invention is to provide a gas detector calibration device that can easily perform a required update process such as a gas calibration process for a diffusion-type portable gas detector that does not incorporate gas suction means. There is.

The gas detector calibration device of the present invention is for renewing a suction type portable gas detector with a built-in gas suction means,
A gas flow path for introducing an update processing gas into the portable gas detector to be processed, and a gas detector mounting recess in which a suction type portable gas detector is mounted;
When the portable gas detector to be processed whose power is turned on is mounted in the recess for mounting the gas detector and connected to the gas flow path,
A confirmation test process in which the selectivity of the type of gas to be detected by the portable gas detector to be processed and the suitability of the gas concentration indication value are confirmed;
Gas calibration processing in which the sensitivity of the portable gas detector to be processed is adjusted,
And an update process consisting of a process for charging the battery for driving the portable gas detector to be processed is performed,
In the confirmation test process and the gas calibration process, the update processing gas is introduced into the portable gas detector to be processed by the gas suction means incorporated in the portable gas detector to be processed.

The gas detector calibration apparatus of the present invention is for updating a diffusion type portable gas detector that does not include a gas suction means,
A gas flow path for introducing the gas for update processing into the portable gas detector to be processed, a gas detector mounting recess in which the portable gas detector to be processed is mounted, and a gas suction means;
When the portable gas detector to be processed whose power is turned on is mounted in the recess for mounting the gas detector and connected to the gas flow path,
A confirmation test process in which the selectivity of the type of gas to be detected by the portable gas detector to be processed and the suitability of the gas concentration indication value are confirmed;
Gas calibration processing in which the sensitivity of the portable gas detector to be processed is adjusted,
And an update process consisting of a process for charging the battery for driving the portable gas detector to be processed is performed,
In the confirmation test process and the gas calibration process, an update process gas is introduced into the target portable gas detector by the gas suction means.

  In the gas detector calibration apparatus according to the present invention, it is preferable that the confirmation test process is performed when the confirmation test process is performed every certain period of time.

  In the gas detector calibration apparatus of the present invention, the gas calibration process is performed when the result of the confirmation test process is poor, and when the result of the confirmation test process is good and the gas calibration process is performed every certain period of time. It is preferable to be carried out when

  According to the gas detector calibration apparatus of the present invention, since the portable gas detector to be processed that is mounted in the recess for mounting the gas detector and is connected to the gas flow path is of the suction type, Since the processing gas can be introduced into the portable gas detector by the gas suction means provided inside the processing portable gas detector, it is not necessary to attach a dedicated gas suction means to the device, and it is easy Gas calibration processing can be performed. In addition, the gas detector calibration apparatus can be configured as having been miniaturized.

  Further, according to the gas detector calibration apparatus of the present invention, even if the portable gas detector to be processed that is mounted in the recess for mounting the gas detector and connected to the gas flow path is a diffusion type, Since the gas for the renewal process can be introduced into the portable gas detector by the gas suction means built in the gas detector calibration device, there is no need to attach a dedicated gas suction means to the device, and the gas can be easily Calibration processing can be performed.

  Hereinafter, the gas detector calibration device of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
FIG. 1 is a gas flow path system diagram showing an outline of an example of the configuration of the gas detector calibration apparatus of the present invention. 2 is a plan view showing an example of the configuration of the gas detector calibration device of the present invention, FIG. 3 is a rear view of the gas detector calibration device of FIG. 2, and FIG. 4 is a diagram of the gas detector calibration device of FIG. It is AA sectional view.

<Gas detector calibration device>
The gas detector calibration apparatus 10 of the present invention is a suction type portable gas detector (hereinafter referred to as “suction type gas detector”) in which a test gas is introduced into the gas detection unit 30C by a gas suction means such as a built-in pump. 30) is the object to be processed, and performs a required update process such as a gas calibration process for the gas sensor constituting the gas detection unit 30C.

The suction type gas detector 30 which is the object to be processed is used for, for example, a gas detection unit 30C having a plurality of gas sensors for detecting different types of gas components and a gas detection operation such as a concentration change of each gas component. It is provided with a recording means (not shown) for recording such gas concentration data and is driven by a driving battery (not shown) made of a rechargeable secondary battery, such as a work site And used by a person.
Inside the suction-type gas detector 30, a gas suction means such as a pump P is inserted in a gas flow path 30B extending from the gas inlet 30A to the gas detector 30C. In addition, a pressure sensor (not shown) for detecting the flow rate of the renewal processing gas flowing through the gas flow path 30B is inserted at a position downstream of the pump P in the gas flow path 30B. A throttle portion (not shown) having a gas discharge amount of 0.4 L / min or more is formed at a position downstream of the pressure sensor.

The gas detector calibration device 10 of the present invention has, for example, a substantially box-shaped housing 17, and a gas detector mounting recess 11 is provided at the top thereof so as to open on the upper surface of the housing 17. Inside, an update processing control means for performing a required update process for the suction type gas detector 30 mounted in the gas detector mounting recess 11 and connected to a gas flow path R described later ( And storage means (not shown) such as a flash memory is provided.
The gas detector mounting recess 11 of the gas detector calibration device 10 has a positioning projection from above in a posture in which the suction type gas detector 30 as the object to be processed is suspended from the gas detector calibration device 10. It has a shape corresponding to the shape of the lower part of the suction type gas detector 30 so as to be stably received by being inserted according to 19.

In addition, a gas flow path R through which an update processing gas introduced into the suction gas detector 30 flows is provided inside the housing 17. Specifically, the gas flow path R includes an update processing gas introduction flow path 22A through which the update processing gas is introduced from the gas inlet 22, and an air introduction flow path 26A through which air outside the apparatus is introduced from the air inlet 26. The renewal processing gas introduction flow path 22A and the air introduction flow path 26A are connected to the renewal processing gas introduction flow path 22A and the air introduction flow path 26A by, for example, a three-way electromagnetic valve 24 which is a flow path opening / closing valve. A gas introduction flow path 25 that leads to the tube cord connection port 23A and a gas discharge flow path 28 that extends from the tube cord connection port 23B to the gas outlet 27 and communicates with either one of them.
Then, the suction type gas detector 30 is connected to the gas detector calibration device 10 through the tube cord T from the tube cord connection port 23A related to the gas introduction passage 25 of the gas passage R through the gas cord 30C. In addition, the gas for update processing is introduced into the gas detection section 30C, and the gas for update processing is connected to the tube cord connection port 23B of the gas discharge passage 28 via the tube cord T from the gas detector 30C. It is configured.

The gas for the renewal processing is used according to the detection target gas related to the gas sensor of the gas detection unit 30C of the suction type gas detector 30. Specifically, for example, oxygen gas, high concentration flammable gas, low concentration flammable gas Examples of such gases include hydrogen gas, hydrogen sulfide gas, and carbon monoxide gas.
The flow rate of the renewal processing gas flowing through the gas introduction flow path 25 of the gas flow path R is set to 0.4 L / min or more, for example.

Further, the operation display panel 12 formed in the lower part of the front surface that is visually recognized from the front surface of the housing 17 has a confirmation test processing lamp 12A indicating the operation state of the confirmation test processing of the suction type gas detector 30 and gas calibration processing. A gas calibration processing lamp 12B indicating the operation state is provided, and a display lamp 16A indicating the operation state or result of the update processing of the suction type gas detector 30 set on the front upper portion visually recognized from the front surface of the housing 17. , 16B are provided.
Specifically, the confirmation test processing lamp 12A displayed as “BUMP” distinguishes and displays the state of the confirmation test processing according to the blinking state, and the gas calibration processing lamp 12B displayed as “CAL” displays the gas calibration. The state of processing is distinguished and displayed by the blinking state. In addition, one display lamp 16A displayed as “CAL” displays the result of the confirmation test process and the gas calibration process by distinguishing the lighting state and the color development state, and the other display lamp displayed as “CHARGE”. 16B displays the status of the charging process by distinguishing between the lighting state and the coloring state.

  In the figure, reference numeral 14 denotes a tube cord housing recess for housing the tube cord T, 13A denotes an AC power supply circuit, and 21 denotes a noise filter.

<Update process>
The update process control means performs the update process by recognizing that the suction type gas detector 30 whose power is on is set in the gas detector calibration apparatus 10.
Specifically, a confirmation test process in which the selectivity of the type of gas to be detected by the gas sensor in the gas detection unit 30C and the suitability of the gas concentration indication value are confirmed, and a gas calibration process in which the sensitivity of the gas sensor in the gas detection unit 30C is adjusted. And the update process which consists of a charge process of a drive battery is performed.
In the update process, the confirmation test process and the gas calibration process are performed in this order.
The charging process is configured to be performed prior to the confirmation test process and / or subsequent to the gas calibration process. The charge process is performed prior to the confirmation test process and further subsequent to the gas calibration process. It is also preferable that Thus, the pump P can be reliably operated to reliably introduce the renewal processing gas into the suction type gas detector 30, and the confirmation test process and the gas calibration process can be accurately performed. The next gas detection operation can be performed in a state where the power consumed by the pump P operated in the gas calibration process is recovered.

[Confirmation test processing]
The confirmation test process confirms, for example, whether the gas type selected by each gas sensor in the gas detection unit 30C of the suction type gas detector 30 and the gas concentration indication value of the detection target gas by the gas sensor are appropriate. To be done as needed.
This confirmation test process is performed when the confirmation test process timing is reached every certain period of time. The confirmation test process is performed by pressing the confirmation test switch 12C provided on the operation display panel 12 for 1 second or longer. Is started.
Here, it is preferable that the time limit of the confirmation test process for the suction type gas detector 30 is, for example, 30 days.
The time required for the confirmation test process is, for example, about 3 minutes.

[Gas calibration processing]
The gas calibration process is performed, for example, to adjust variations in sensitivity of the gas sensor in the suction type gas detector 30 or to compensate for variations in sensitivity characteristics of the gas sensor over time. Done as needed.
This gas calibration process is executed when the gas calibration process timing is reached every certain period of time, and the gas calibration switch 12D provided on the operation display panel 12 is continuously pressed for 1 second or more to thereby perform the gas calibration process. Processing begins. However, if the result of the confirmation test process performed prior to the gas calibration process is poor, the gas calibration process is automatically performed by the update process control means regardless of whether or not the gas calibration process time is reached. To begin.
Here, the time limit of the gas calibration process for the suction type gas detector 30 is set as appropriate, for example, 90 days.
The time required for the gas calibration process is, for example, about 3 minutes.

  Here, the case where the result of the confirmation test process is good means that the selectivity of the suction type gas detector 30 is maintained and the concentration indication value is appropriate, specifically Is, for example, a case where the difference between the detected concentration indication values with respect to the actual concentration of the detection target gas related to each gas sensor of the gas detection unit 30C is within a range of ± 10 to 30% or less. If the difference between the detected indication values of density is outside this range, the result of the confirmation test process is judged to be defective.

[Charging process]
In the charging process, the charging input terminal (not shown) of the suction type gas detector 30 is electrically connected to the charging output terminal 18 provided in the bottom of the gas detector mounting recess 11 of the gas detector calibration device 10. And that the power supply of the suction type gas detector 30 is in the off state is recognized by the update processing control means.
The time required for the charging process of the suction type gas detector 30 is, for example, about 2 hours.

In the gas detector calibration apparatus 10 described above, as shown in FIG. 5, the renewal process of the suction type gas detector 30 is performed.
First, after the gas detection operation is completed, the operator turns on the power switch 13 of the gas detector calibration device 10 to turn off the power of the suction type gas detector 30, and the gas detector mounting recess of the gas detector calibration device 10 is turned off. The charging process is started by the update process control means by being mounted at the place 11.
Then, after an appropriate time has elapsed, the operator manually turns on the power of the suction type gas detector 30 and the tube cords T and T gas the gas detection unit 30C of the suction type gas detector 30. By connecting to the flow path R, it is recognized by the update processing control means that the suction type gas detector 30 is set in the gas detector calibration device 10, and further, it is in the confirmation test processing timing for every certain period of time. In this case, the confirmation test process is started by continuously pressing the confirmation test switch 12C provided on the operation display panel 12 for one second or more.

Specifically, air or renewal processing gas is introduced into the gas detector 30C of the suction type gas detector 30 through the gas introduction channel 25 of the gas channel R by the pump P of the suction type gas detector 30. The confirmation test process is performed as follows.
That is, for example, the three-way electromagnetic valve 24 of the gas flow path R is switched to the air side, and air is introduced from the outside of the apparatus through the air inlet flow path 26A to the gas detection unit 30C for 45 seconds, for example. Then, zero calibration is performed in which the gas concentration instruction value at this time is zero. Subsequently, the three-way solenoid valve 24 is switched to the gas side, and the update processing gas is supplied from the gas source (not shown) from the gas inlet 22 through the update processing gas introduction flow path 22A to the gas detection unit 30C for 90 seconds, for example. Thus, the selectivity of the type of gas to be detected and the suitability of the gas concentration indication value are confirmed for each of the gas sensors in the gas detection unit 30C.

Next, when it is at the gas calibration processing timing at every elapse of a certain period, the gas calibration processing is started by pressing the gas calibration switch 12D provided on the operation display panel 12 for one second or more.
On the other hand, if the result of the confirmation test process is poor, a gas calibration process, which will be described later, is automatically performed for the suction type gas detector 30.

That is, for example, the three-way electromagnetic valve 24 of the gas flow path R is switched to the air side, and air is introduced from the outside of the apparatus through the air inlet flow path 26A to the gas detection unit 30C for 45 seconds, for example. Then, zero calibration is performed in which the gas concentration instruction value at this time is zero. Subsequently, the three-way solenoid valve 24 is switched to the gas side, and the update processing gas is introduced into the gas detection unit 30C from the gas inlet 22 via the update processing gas introduction flow path 22A, for example, for 90 seconds. Thus, in each of the gas sensors in the gas detection unit 30C of the suction type gas detector 30, the sensitivity variation is adjusted and the sensitivity characteristic variation with time is compensated.
The gas discharged from the gas detector 30C is finally discharged to the outside from the gas detector calibration device 10 via the gas discharge channel 28 and the gas outlet 27.

  Further, after a predetermined time, for example, 10 minutes has passed since the suction type gas detector 30 has been in the non-operating state, the power source of the suction type gas detector 30 is automatically turned off by the update processing control means. The charging process for the suction type gas detector 30 is continued.

During the required renewal process for the suction gas detector 30 as described above or after the end of the renewal process, the state or result of the renewal process of the suction gas detector 30 is confirmed by the confirmation test processing lamp 12A, the gas calibration process. The display is distinguished according to the lighting state of the lamp 12B, the lighting state of the display lamps 16A and 16B, and the coloring state.
Specifically, for example, during the confirmation test process, the confirmation test process lamp 12A is blinking green and one of the display lamps 16A is blinking yellow. After the confirmation test process is completed, the confirmation test process is performed. When the lamp 12A is lit in green and the result of the confirmation test process is good, one of the display lamps 16A is lit in green, and when the result of the confirmation test process is bad, The display lamp 16A is lit red.
Further, during the gas calibration process, the gas calibration process lamp 12B is in a green blinking state and one display lamp 16A is in a yellow blinking state. After the gas calibration process is completed, the gas calibration process lamp 12B is in a green lighting state. At the same time, when the result of the gas calibration process is good, one of the display lamps 16A is lit in green, and when the result of the gas calibration process is bad, that is, the gas detection unit of the suction type gas detector 30. When the 30C gas sensor is deteriorated so as to deviate from the gas calibration possible range, one of the display lamps 16A is turned on in red.
In the above, when both the confirmation test process and the gas calibration process are performed, only when both of them are good, one of the display lamps 16A is lit in green, and when either one is defective, The one display lamp 16A is lit red.
Further, during the confirmation test process and the gas calibration process other than the charging process, the other display lamp 16B is in a green blinking state. Further, during the charging process, the other display lamp 16B is blinking yellow, and after the charging process is finished, the other display lamp 16B is lit in green.

According to the gas detector calibration apparatus 10 as described above, the portable gas detector mounted in the gas detector mounting recess 11 and connected to the gas flow path R is a suction type. As a result, the renewal processing gas can be introduced into the suction type gas detector 30 by the pump P provided in the suction type gas detector 30, so that an operation of attaching a dedicated gas suction means to the apparatus is required. Gas calibration processing can be easily performed without necessity.
Further, there is no need to incorporate a dedicated gas suction means inside the gas detector calibration device, and the gas detector calibration device can be configured as having been reduced in size.

<Second Embodiment>
6 is a gas flow path system diagram showing an outline of another example of the configuration of the gas detector calibration apparatus of the present invention, and FIG. 7 is a schematic sectional view showing an outline of a cross section of the gas detector calibration apparatus of FIG. is there.

  The gas detector calibration apparatus 10 of this example has a diffusion type portable gas detector (hereinafter referred to as “diffusion type gas”) in which the gas to be detected is supplied to the gas detection unit 30C by diffusion without incorporating a gas suction means. It is also referred to as a “detector”.) The basic structure is the same as that described above except that 31 is an object to be processed, and gas suction means for sucking the renewal processing gas is provided therein. This is the same as the gas detector calibration device 10 in the first embodiment.

  Inside the gas detector calibration device 10, a gas suction means such as a pump 32 is inserted in a gas introduction flow path 25 extending from the three-way solenoid valve 24 to the diffusion gas detector 31. Further, a pressure sensor S for detecting the flow rate of the renewal processing gas flowing through the gas introduction channel 25 is inserted at a position downstream of the pump 32 in the gas introduction channel 25, and this pressure A throttle portion Q is formed at a position downstream of the sensor S so that the gas discharge amount is, for example, 0.4 L / min or more.

  In the gas detector calibration apparatus 10 described above, the diffusion gas detector 31 is supplied with air or an update processing gas via the gas introduction flow path 25 of the gas flow path R by the pump 32 built in the gas detector calibration apparatus 10. The diffusion gas detector 31 is updated by being introduced into the gas detector 30C.

  According to the above gas detector calibration device, even if the portable gas detector to be processed which is mounted in the gas detector mounting recess 11 and connected to the gas flow path R is a diffusion type, Since the gas for renewal processing can be introduced into the diffusion gas detector 31 by the gas suction means built in the gas detector calibration device 10, there is no need to attach a dedicated gas suction means to the device, and it can be easily performed. Gas calibration processing can be performed.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment, A various change can be added.

It is a gas flow-path system figure which shows the outline in an example of a structure of the gas detector calibration apparatus of this invention. It is a top view which shows an example of a structure of the gas detector calibration apparatus of this invention. It is a rear view of the gas detector calibration apparatus of FIG. It is the sectional view on the AA line of the gas detector calibration apparatus of FIG. It is a flowchart which shows the procedure of the update process which concerns on the gas detector calibration apparatus of this invention. It is a gas flow-path system figure which shows the outline in another example of the structure of the gas detector calibration apparatus of this invention. It is a schematic sectional drawing which shows the outline of the cross section of the gas detector calibration apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Gas detector calibration apparatus 11 Gas detector mounting recess 12A Confirmation test processing lamp 12B Gas calibration processing lamp 12C Confirmation test switch 12D Gas calibration switch 12 Operation display panel 13 Power switch 13A AC power supply circuit 14 Recess 16A for tube code accommodation One indicator lamp 16B The other indicator lamp 17 Housing 18 Charging output terminal 19 Positioning protrusion 21 Noise filter 22 Gas inlet 22A Gas inlet flow passage 23A, 23B for renewal processing Tube cord connection port 24 Three-way solenoid valve 25 Gas inlet flow Passage 26 Air inlet 26A Air inlet passage 27 Gas outlet 28 Gas outlet passage 30 Suction gas detector 30A Gas inlet 30B Gas passage 30C Gas detector 31 Diffusion gas detector 32 Pump

Claims (4)

A gas detector calibration device for renewing a suction type portable gas detector with a built-in gas suction means,
A gas flow path for introducing an update processing gas into the portable gas detector to be processed, and a gas detector mounting recess in which the portable gas detector to be processed is mounted;
When the portable gas detector to be processed whose power is turned on is mounted in the recess for mounting the gas detector and connected to the gas flow path,
A confirmation test process in which the selectivity of the type of gas to be detected by the portable gas detector to be processed and the suitability of the gas concentration indication value are confirmed;
Gas calibration processing in which the sensitivity of the portable gas detector to be processed is adjusted,
And an update process consisting of a process for charging the battery for driving the portable gas detector to be processed is performed,
In the verification test process and the gas calibration process, the gas detection means is characterized in that the gas for update processing is introduced into the portable gas detector to be processed by the gas suction means incorporated in the portable gas detector to be processed. Calibration equipment. A gas detector calibration device for updating a diffusion portable gas detector that does not include a gas suction means,
A gas flow path for introducing the gas for update processing into the portable gas detector to be processed, a gas detector mounting recess in which the portable gas detector to be processed is mounted, and a gas suction means;
When the portable gas detector to be processed whose power is turned on is mounted in the recess for mounting the gas detector and connected to the gas flow path,
A confirmation test process in which the selectivity of the type of gas to be detected by the portable gas detector to be processed and the suitability of the gas concentration indication value are confirmed;
Gas calibration processing in which the sensitivity of the portable gas detector to be processed is adjusted,
And an update process consisting of a process for charging the battery for driving the portable gas detector to be processed is performed,
In the verification test process and the gas calibration process, the gas detector calibration apparatus is characterized in that the gas for update processing is introduced into the portable gas detector to be processed by the gas suction means.   The gas detector calibration apparatus according to claim 1 or 2, wherein the confirmation test process is performed when a confirmation test process is performed every time a predetermined period of time elapses. The gas calibration process is to be performed when the result of the confirmation test process is poor, and when the result of the confirmation test process is good and the gas calibration process is performed every certain period of time. The gas detector calibration device according to claim 3, wherein the gas detector is calibrated.

Images