JP3353426B2 - Analog type sensor characteristic tester - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for testing characteristics of an analog sensor.

[0002]

2. Description of the Related Art Conventionally, analog detectors that output an analog voltage corresponding to the detected smoke density or temperature are classified into AN type by the fire alarm certification association in Japan, and have two conventional ON and OFF states. It was positioned as a composite type of a general sensor that outputs a signal indicating a state. For this reason, in the characteristic test of the analog sensor, an operation test and a non-operation test were performed at the concentration or the temperature specified in Table 1 or Table 2.

[0003]

[Table 1]

[0004]

[Table 2]

Therefore, conventionally, even in the case of an analog sensor, an operation test and a non-operation test have been carried out by using a characteristic test device of a general sensor.

[0006]

However, the method of testing the characteristics of the analog sensor has been changed, and the conventional characteristic tester for a general sensor has a problem that the linear rise test of the analog sensor cannot be performed. . In the case of a smoke detector, in the case of a smoke detector, the smoke density is changed, and the A / D conversion of the density measurement value of the extinction type densitometer and the density measurement value of the analog type smoke detector under test is performed. Transmitted as a digital signal to the receiver, taking the density measurement of the dimming densitometer on one axis, plotting the density measurement value of the analog smoke detector for test on the other axis, and plotting it on the other axis. It is said that it is determined whether each measured value of the analog smoke detector is within the range of the upper limit value and the lower limit value obtained by multiplying the density measured value of the darkening type densitometer by a certain constant. Was something. Since the conventional characteristic test apparatus was not provided with a function for plotting and checking characteristics by changing the concentration, it was not possible to carry out a linear rise test with the conventional characteristic test apparatus.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a structure of an analog sensor characteristic test apparatus capable of performing a linear rise test of an analog sensor. Is to provide.

[0008]

In order to achieve the above object, an analog sensor characteristic test apparatus according to claim 1 is provided.
A computer that receives, via a multiplex transmission line, an analog sensor density measurement value output in the form of a digital signal from an analog smoke sensor and captures the density measurement value output by the extinction densitometer; And a plotting means connected to the computer for expressing the measured value of the density of the analog sensor versus the measured value of the density of the extinction densitometer in a diagram.

According to a second aspect of the present invention, there is provided an analog sensor characteristic test apparatus which receives an analog sensor temperature measurement value output in the form of a digital signal from an analog heat sensor via a multiplex transmission line, and receives a thermoelectric signal. A computer that captures thermocouple temperature measurements measured using a pair, and plotting means connected to the computer for plotting the analog sensor temperature measurements versus the thermocouple temperature measurements. It is characterized by the following.

[0010]

The computer according to the first aspect of the present invention can continuously receive the analog sensor concentration measurement value output in the form of a digital signal from the analog smoke detector via the multiplex transmission line 3, and can also receive the analog sensor concentration measurement value. The density measurement value of the extinction rate densitometer output from the extinction rate densitometer 4 can be continuously taken in corresponding to the density measurement value of the sensor. Claim 1
2. The drawing means described is a CRT, a recorder, and the like.
The relationship between the analog sensor density measurement value and the extinction rate densitometer density measurement value can be expressed in the form of a figure by being connected to the computer described above.

According to the second aspect of the present invention, the computer can continuously receive the analog sensor temperature measurement value output in the form of a digital signal from the analog heat sensor via the multiplex transmission line 3 and can receive the analog sensor temperature measurement value. The thermocouple temperature measurement value measured using the thermocouple 5 can be continuously taken in accordance with the temperature sensor temperature measurement value. Claim 2
The drawing means described is a CRT, a recorder, or the like, and wherein
It is connected to the described computer and can represent the relationship between the analog sensor temperature measurement and the thermocouple temperature measurement in the form of a diagram.

[0012]

FIG. 1 shows the configuration of an embodiment of an analog sensor characteristic test apparatus according to the present invention. 1 is a computer and 2 is a CRT which is a drawing means. Computer 1 is a CP
U-based computer, GPIB interface, fire unit interface, I / O
It consists of a board and an interface unit. The GPIB interface is connected to the extinction rate densitometer 4 via a multimeter, and the measured value of the extinction rate densitometer output from the extinction rate densitometer 4 is taken into the computer 1 through the GPIB interface.
Further, the analog smoke detector density measurement value output from each analog smoke detector is taken into the computer 1 through the fire unit interface and the interface unit and the multiplex transmission line 3 connected to the interface unit. The fire unit and each analog-type sensor are connected by two lines, and a voltage corresponding to each test condition is applied to each line by the fire unit. The rotary switch changes the applied voltage in accordance with each test condition.

Each analog type sensor is attached to the back side of a lid of a sensor input port provided in the test tank, and is inserted into the test tank by closing the lid. A switch for sending a start signal is attached to the lid, and the switch is connected to a terminal of the start trigger 1 or the start trigger 2. The terminals of the start trigger 1 and the start trigger 2 are connected to a start trigger generation circuit. When the lid is closed, the switch is turned on, and the start trigger signal is sent to the computer 1 by the start trigger generation circuit to perform a test. Is started.

Further, the apparatus for testing the characteristics of an analog sensor shown in this embodiment is provided with a panel meter and a thermocouple 5, so that a linear rise test of the analog heat sensor can be performed. . When performing an analog heat sensor test, each analog heat sensor is connected to the fire unit interface and the interface unit and the multiplex transmission line 3 connected to the interface unit, as in the case of the analog smoke sensor. Output analog thermosensor temperature measurement value to computer 1
It is taken in. The thermocouple temperature measured using the thermocouple 5 is input to the computer 1 from the panel meter.

FIG. 2 shows an example of a drawing in the case where a straight rise test is performed using an analog smoke detector. The horizontal axis of the graph shown in the figure represents the density measurement value of the extinction densitometer, which is the reference value, and the vertical axis represents the analog smoke detector density measurement value. In the drawing example shown in the figure, the measured values of two analog smoke detectors are simultaneously displayed on one screen. Above the horizontal axis, the line number, the sensor address, and the analog smoke sensor density measurement value are displayed. As shown in the figure, the analog-type sensor characteristic test apparatus of the present invention uses an analog-type smoke detector density measurement value on a graph, and an upper limit specification value and a lower limit specification value obtained by multiplying a constant by the density measurement value of the extinction concentration meter. Is displayed, so that the characteristics of the analog smoke detector can be determined and analyzed in real time.

FIG. 3 shows an example of plotting when a linear ascending test is performed using an analog heat sensor. The horizontal axis of the graph shown in the figure represents a thermocouple temperature measurement value as a reference value, and the vertical axis represents an analog heat sensor temperature measurement value. As shown in the figure, the analog sensor characteristic test apparatus of the present invention displays an analog heat sensor temperature measurement value and an upper limit specification value and a lower limit specification value obtained by multiplying a thermocouple temperature measurement value by a constant. With this configuration, the characteristics of the analog heat sensor can be determined and analyzed in real time, as in the case of the analog smoke detector.

[0017]

As described above, according to the analog sensor characteristic test apparatus of the present invention, the measured value of the analog sensor can be displayed on the graph together with the reference value, so that the analog sensor can be displayed. A straight rise test of the vessel can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of an analog sensor characteristic test apparatus according to the present invention.

FIG. 2 shows a smoke detector sensitivity test apparatus according to the present invention.
It is the diagram which plotted the characteristic of the analog type smoke detector.

FIG. 3 shows a smoke detector sensitivity test apparatus according to the present invention.
It is the diagram which plotted the characteristic of the analog heat sensor.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 computer 2 CRT (plotting means) 3 multiplex transmission line 4 extinction densitometer 5 thermocouple

Continuation of the front page (51) Int.Cl. ⁷ identification code FI G08B 17/00 G08B 17/00 D (58) Field of investigation (Int.Cl. ⁷ , DB name) G01D 21/02 G01D 18/00 G01K 1 / 02 G01K 7/02 G01N 21/59 G08B 17/00

Claims (3)

(57) [Claims] 1. An extinction densitometer output from an extinction densitometer while receiving, via a multiplex transmission line, an analog detector density measurement value output in the form of a digital signal from an analog smoke detector. An analog sensor comprising: a computer for capturing a value; and plotting means connected to the computer for plotting the analog sensor density measurement value versus the extinction densitometer density measurement value in a diagram. Equipment characteristic test equipment. 2. An analog sensor temperature measurement value output in digital signal form from an analog heat sensor is received via a multiplex transmission line, and a thermocouple temperature measurement value measured using a thermocouple is taken in. An analog sensor characteristic test apparatus, comprising: a computer; and a plotting means connected to the computer for expressing the analog sensor temperature measurement value versus the thermocouple temperature measurement value in a diagram. 3. An extinction densitometer output from the extinction densitometer which receives an analog sensor density measurement value output in a digital signal form from the analog smoke detector via a multiplex transmission line. A computer that receives the analog sensor temperature measurement value output in the form of a digital signal from the analog heat sensor via a multiplex transmission line, and captures the thermocouple temperature measurement value measured using a thermocouple; A plotting means connected to the computer for graphically expressing the analog sensor concentration measurement value versus the extinction densitometer concentration measurement value or the analog sensor temperature measurement value versus the thermocouple temperature measurement value An analog sensor characteristic test apparatus comprising: