JP2747863B2 - Sensing unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensing unit for detecting a fire or the like from temperature, smoke density and the like.

[0002]

2. Description of the Related Art Conventionally, for detecting a fire or the like, for example, JP-A-3-222097 and JP-A-1-216497.
As disclosed in Japanese Unexamined Patent Application Publication No. H11-133, there is known a sensor that detects a fire or the like from a difference value such as a temperature and a smoke density.

FIG. 7 is a diagram showing an example of the sensor disclosed in the above-mentioned conventional publication. This sensor includes a temperature detection circuit 74 for obtaining an analog detection signal corresponding to a temperature, and a sensor for detecting the analog detection signal. A / for converting to digital data
D conversion circuit 75 and CP for performing predetermined signal processing
U, a signal processing circuit 70 and an A / D conversion circuit 7
A data memory 76 for temporarily storing the digital data output from the signal processing circuit 5 via the signal processing circuit 70, and a program for executing processing in the signal processing circuit 70 and reference data necessary for the program processing. It has a program memory 77, a switching circuit 71 for outputting an alarm signal, a power supply circuit 72 for supplying power to each section, and an initial setting circuit 73 for clearing the data memory 76.

In the sensor having such a configuration, a signal processing circuit 70 is operated in accordance with a program stored in a program memory 77.
Refers to the digital data fetched into the data memory 76 every predetermined time, and compares the value of the latest digital data stored in the data memory 76 by a predetermined time before the latest digital data. The difference value with the value of the digital data stored in is detected, and this difference value is
When the value exceeds the value of the reference data stored in advance in the program memory 77 in correspondence with the predetermined temperature rise rate, the switching circuit outputs an alarm determination signal.
That is, in this conventional sensor, a function as a differential heat sensor is realized by an arithmetic unit (program) built in the sensor, and a fire is detected.

[0005]

By the way, in the above-mentioned conventional sensor, an arithmetic unit (program) is provided in the sensor.
Is built-in, so that it can be used only as a dedicated sensor and lacks versatility. That is, if the fire detection target is temperature,
In correspondence with the temperature detection circuit 74, the signal processing circuit 70
There is no function to detect the temperature difference, and only programs that perform only the temperature difference detection calculation are set. Therefore, using this sensor, other detection targets, such as smoke, are detected. It is not possible. Therefore, when attempting to detect smoke or the like, it is necessary to separately provide a dedicated sensor.

In order to avoid such a problem, a means for detecting smoke or the like is further provided in the sensor, and the signal processing circuit 70 is provided with an arithmetic function for differentially detecting the smoke or the like in correspondence with the means. It is also conceivable to add a program for data processing of smoke or the like. However, in this case, there is a disadvantage that the structure in one sensor is very large and complicated, and one sensor is expensive.

It is also conceivable to provide the arithmetic function for detecting the difference in the receiver. In this case, the sensor can be made smaller, but the processing in the receiver becomes complicated, and a large-capacity storage unit is required.
The disadvantage is that it is not practical.

The present invention provides a highly versatile and versatile sensor applicable to a plurality of detection targets capable of realizing arithmetic functions such as difference detection without complicating the structure in the sensor or the processing in the receiver. It is an object of the present invention to provide a unit.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, a predetermined detection target is detected.
A sensor that functions as a detection unit, and detection data from the sensor.
Functioning as a calculation unit that performs a predetermined calculation on data
The adapter is divided into two parts, and the sensor is connected to the adapter.
It is designed to be detachably attached, and an adapter
Is a program storage means capable of storing a plurality of types of arithmetic programs according to the type of sensor, and when a predetermined sensor is attached, an arithmetic program corresponding to the type of the sensor is stored in the program storage means. Program detection means for selecting from among a plurality of types of operation programs being performed, and when detection data is sent from the sensor, a predetermined operation is performed on the detection data using the selected operation program and output. And a signal processing means for performing the operation. It is characterized by:

[0010]

According to a second aspect of the present invention, there is provided the sensing unit according to the first aspect , further comprising a base for connecting the adapter and the sensor to a receiver. The invention is characterized in that the adapter is detachably attached.

According to a third aspect of the present invention, in the sensing unit according to the second aspect , the adapter is detachably attached to the base, and the sensor is directly detachably attached to the base. It is characterized by having.

[0013]

According to the first aspect of the present invention , the detecting unit and the calculating unit
Is divided into a sensor and an adapter.
It is extremely easy to respond to changes in the detector that is the detector.
It will be easier. In particular, the program storage means of the adapter includes:
When a plurality of types of operation programs are stored and a predetermined sensor is attached to this adapter, an operation program corresponding to the type of the sensor is selected by the program selection means. As a result, it is possible to subject the detection data from the sensor to arithmetic processing such as detection of a difference according to the type of the sensor and output the result.

[0014]

[0015] In the present invention of claim 2, wherein, wherein
Item 1. The sensing unit according to Item 1 , further comprising:
A base for connecting the sensor to the receiver is provided, and the adapter is detachably attached to the base, and the sensor is also directly attached to the base detachably. It is supposed to be. Thus, for example, when an analog sensor is changed to a differential sensor, only an adapter may be added, and when the differential sensor is changed to an analog sensor, the adapter is removed. Just good.

[0016]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an embodiment of the sensing unit according to the present invention. Referring to FIG. 1, the sensing unit 1 includes:
The sensor 2 and the adapter 3 for the sensor 2 are divided, and the sensor 2 has a predetermined detection target (for example, temperature).
, An A / D converter 12 for converting the analog detection signal into digital data, and a transmitter for transmitting digital data from the A / D converter 12 to the outside. 13 are provided. In this case, the sensor 2 can more specifically have a circuit configuration similar to that of a conventionally used analog sensor, for example, as shown in FIG. In the configuration example of FIG. 2, the sensor 2 has a unique address for the receiver 4,
An address comparison unit 50 for comparing the address when the address is sent from the receiver 4 with its own unique address, and a command (fire information collection command, type data command, or control command) from the receiver 4 side. ) Is sent, the command identification unit 51 for identifying the command, and when the command identification unit 51 determines that the command is a type data command, the type data of the sensor 2 is transmitted to the receiver 4. And a control unit 53 that performs control of returning fire information to the receiver 4 and collecting necessary data in response to a command from the receiver 4 side. ing. A transmission unit 54 is provided corresponding to the transmission unit 13 in FIG. 1. The transmission unit 54 has a reception function in addition to the transmission function of the transmission unit 13. I have.

In FIG. 1, the adapter 3 includes a receiving unit 14 for receiving digital data transmitted from the transmitting unit 13 (transmitting unit 54) of the sensor 2, and a receiving unit 14 for performing predetermined signal processing. Signal processing unit 1 composed of CPU etc.
5, a data memory 16 for temporarily storing digital data from the sensor 2 received by the receiving unit 14 via the signal processing unit 15, and an arithmetic program and program processing executed by the signal processing unit 15. A program memory 17 for storing necessary data and the like, a timer 18 for measuring time, and a transmission unit 20 for transmitting a processing result of the signal processing unit 15 to the receiver 4 are provided. More specifically, the program memory 17 stores a plurality of types of calculation programs (for example, a difference detection calculation program for temperature, a difference detection calculation program for smoke, and the like). In order to select one of the types of operation programs, a program selection unit 19 is further provided.

That is, in the present embodiment, when a predetermined detection target is detected, a predetermined calculation is performed based on the detection data, and the processing result is transmitted to the receiver 4, the predetermined detection target is detected. The detection unit for detection and the calculation unit for performing a predetermined calculation are divided, and the calculation unit is provided in the adapter 3 independently of the sensor 2.

FIG. 3 is a front view of the sensing unit 1. In FIG. 3, the sensor 2 and the adapter 3 are shown separated. FIG. 4A is a top view of the sensor 2, and FIG. 4B is a bottom view of the adapter 3. Referring to FIG. 3, the sensor 2 is detachably attached to a base 5 via an adapter 3. Detector 2
Is provided with an engagement projection 30 on the upper surface. Also,
The adapter 3 is provided with an engagement projection 31 on the upper surface and a groove 32 for receiving the engagement projection 30 of the sensor 2 on the bottom surface. The base 5 has an engagement protrusion 31 of the adapter 3 or an engagement protrusion 30 of the sensor 2.
A groove 33 for receiving the hole is formed. Detector 2
4A is provided on a predetermined circumference C as shown in FIG. 4 (a).
As shown in FIG. 4B, the groove 32 of the adapter 3 is also formed on the circumference C 'having the same diameter. Although not shown, the engagement projection 31 of the adapter 3 and the groove 33 of the base 5 are also provided on the circumference of the same diameter in the same arrangement. In such a configuration, the sensor 2 can be attached to the base 5 via the adapter 3, or the sensor 2 can be directly attached without the adapter 3. Detector 2
Can be attached to the adapter 3 by inserting the engagement projection 30 of the sensor 2 into the groove 32 of the adapter 3 and then turning the sensor 2 in the direction of arrow A as shown in FIG. . Conversely, if the sensor 2 is turned in the direction of arrow B,
The sensor 2 can be removed from the adapter 3. The attachment and detachment of the adapter 3 to and from the base 5 and the attachment and detachment of the sensor 2 to and from the base 5 can be performed in the same manner.

When the sensor 2 is attached to the adapter 3 as described above, the sensor 2 and the adapter 3 are electrically connected, and similarly, the adapter 3 or the sensor 2
Is attached to the base 5, the adapter 3 or the sensor 2 and the base 5 are electrically connected. That is,
As shown in FIG. 5A, when the sensor 2 is attached to the base 5 via the adapter 3, the sensor 2
Is electrically connected to the base 5 via the base 5 and is connected to the receiver 4 via the base 5. 5B, when the sensor 2 is directly attached to the base 5, the sensor 2 is connected to the receiver 4 via the base 5.

FIG. 6 shows a receiver 4 of the sensing unit of the present embodiment.
FIG. 6 is a diagram illustrating an example of connection to the server. In this example, the receiver 4
From the transmission line LN to the n sensing units D _{1 to} D _n
Are connected, of which m sensing units D ₁
To D _m it is adapted to that sensor 2 as shown is attached to the base 5 via the adapter 3 in FIG. 5 (a), other sensing units _{D m} + 1 ~D _n is 5 ( As shown in b), the sensor 2 is directly attached to the base 5.

Referring again to FIG. 6, the receiver 4 includes a processor 41 for controlling the whole, and each of the sensing units D ₁ to D ₁ .
A transmission unit 42 for transmitting information between the D _n, a storage unit 43 for storing predetermined data, an operation unit 44, and a display unit 45.

Next, the operation of the sensing unit having such a configuration will be described. It is assumed that a conventionally known analog sensor as shown in FIG. 2 is used as the sensor 2. It is also assumed that the program memory 17 of the adapter 3 previously stores, for example, a difference detection calculation program, that is, a difference detection calculation program for temperature, a difference detection calculation program for smoke, and the like. Now, when the sensing unit is configured as a normal analog sensor having only a function of detecting a predetermined detection target (for example, temperature or smoke), as shown in FIG. Attach directly to 5. In this case, like the sensing units D _{m + 1 to} D _n shown in FIG. 6, they are connected to the receiver 4 via the transmission line LN. When the sensing unit is configured in this manner, the sensing unit functions as a normal analog sensor. When a predetermined detection target, for example, a temperature is detected, the detection signal is directly sent to the receiver 4, and the detection signal is transmitted to the receiver 4. Performs a predetermined process.

On the other hand, when it is desired to configure the sensing unit as a differential sensor, the sensor 2 is attached to the base 5 via the adapter 3 as shown in FIG. In this case, the sensing units D _{1 to} D shown in FIG.
_{As shown by m} , it is connected to the receiver 4 via the transmission line LN. When attaching the sensor 2 to the adapter 3, the user can operate the program selection unit 19 of the adapter 3, specifically, a switch, to select a difference detection calculation program according to the type of the sensor 2. For example, if the sensor 2 used is an analog sensor for detecting temperature,
A program for detecting a difference for temperature can be selected by the program selector 19. When the sensor 2 used is an analog sensor for smoke detection, a smoke difference detection calculation program can be selected in the same manner. Thus, the differential heat detector sensing unit D _1, also the sensing unit D ₂ can be configured to that the differential type smoke sensor.

[0025] Thus, when configured as a sensing unit D _1, for example, differential heat detector, the sensor 2 of the sensing unit D _1, the ambient temperature is detected analog, which A / D conversion After being converted into digital data by the unit 12, it is given as temperature detection data to the adapter 3 via the transmission unit 13. In the adapter 3, the temperature detection data sent from the sensor 2 is received by the receiving unit 14, and is received by the signal processing unit 1.
5 and stored in the data memory 16. Signal processing unit 1
5 refers to the temperature detection data taken into the data memory 16 at predetermined time intervals measured by the timer 18 in accordance with the temperature difference detection calculation program selected by the program selection unit 19, and updates the latest temperature detection data. And a difference value between the value of the temperature detection data and the value of the temperature detection data stored a predetermined time before this value. Then, when the difference value exceeds a predetermined value, the adapter 3 outputs a notification determination signal from the transmission unit 20 to the receiver 4. Thus, the receiver 4 can know that a fire occurs in a place that is located in the sensing unit D _1.

Further, even if the sensing unit D ₂ formed, for example, as a differential type smoke sensor, in the same manner, the sensor 2 of the sensing unit D _2, and detects the ambient smoke, smoke it Provided to adapter 3 as detection data, adapter 3
Then, this is stored in the data memory 16, and the difference value of the smoke detection data at predetermined time intervals is detected according to the smoke difference detection calculation program selected by the program selection unit 19, and when the difference value exceeds the predetermined value, An alarm determination signal is output to the receiver 4. Thereby, in the receiver 4,
Fire can know of the occurrence at a location are placed in the sensing unit D _2.

By the way, in this embodiment, since the detecting section and the calculating section are divided and the calculating section is configured as the adapter 3 separately from the analog sensor 2, various changes can be made easily. . For example, the sensing unit D ₁ which is used as Sadoshikinetsu sensor, when changing the Sadoshikikemuri sensor may without replacing the entire sensing unit D _1, for detecting temperature that is currently installed Is removed from the adapter 3 and an analog sensor for smoke detection is attached to the adapter 3 in place of this, and the program for selecting a difference 19 is operated by operating the program selection unit 19 of the adapter 3 to switch to the one for smoke. Just good. Moreover, even when changing the sensing unit D ₂ which is used as Sadoshikikemuri sensor differentially heat detector, similarly, it may without replacing the entire smoke currently installed detector The analog sensor for smoke detection is detached from the adapter 3, the analog sensor for smoke detection is attached to the adapter 3 instead, and the difference detection calculation program is switched to the one for temperature by operating the program selection unit 19 of the adapter 3. Just good. That is, since the adapter 3 incorporates a plurality of difference detection calculation programs, it is not necessary to replace the adapter 3 itself.
You just need to replace it.

Further, the sensing unit is used as a differential sensor, such as D _1, if you want to change to a normal analog sensor simply need only remove the adapter 3 in the sensing unit D _1, the sensing There is no need to replace the entire unit with another sensor. Also, a sensing unit used as an analog sensor, for example, D _{m + 1}
Is changed to a differential sensor, the adapter 3 is connected between the sensor 2 and the base 5 of the sensing unit D _{m + 1.}
Need only be added, and there is no need to replace the sensor with another sensor. Also, when implementing the various aspects described above, the receiver 4 need not have any associated processing function, and the processing in the receiver 4 does not need to be complicated.

As described above, the sensing unit of this embodiment is
The versatility and flexibility are extremely high, and various modes can be easily realized without requiring a dedicated sensor. Also,
Despite its high versatility, it can be kept compact as a whole and has an inexpensive structure. In other words, although the adapter 3 has a plurality of built-in arithmetic means, the sensor 2 need not have a plurality of detection means for a plurality of objects (for example, temperature and smoke). As the device 2, a device having only a detection means for one object (for example, temperature or smoke) can be used, so that the device can be kept small and the cost can be kept low. . In addition, a conventionally known analog sensor can be used as the sensor 2, and when a conventionally known analog sensor is used, when realizing the various aspects as described above, Essentially, only the adapter 3 needs to be newly prepared.

In FIG. 1, the adapter 3 is provided with a receiving unit 14 and a transmitting unit 20 separately. In this case, the adapter 3 performs predetermined processing on the data from the sensor 2. In this case, the receiving unit 14 and the transmitting unit 20 are combined into one unit, for example, as a transmitting unit, and the transmitting unit is provided with a bidirectional transmitting / receiving function. Is also good. That is, the adapter 3 may have a function of performing predetermined processing on data from the sensor 2 and transmitting the data to the receiver 4, and a function of transmitting information from the receiver 4 to the sensor 2.

In the above embodiment, the adapter 3
Although the description has been made on the assumption that the calculation of the difference detection is performed, the calculation other than the difference detection can be performed by storing the calculation program other than the difference detection in the program memory 17.

[0032]

As described above, according to the first aspect of the present invention, the detecting unit and the calculating unit include the sensor and the adapter.
Since each is divided as
It is extremely easy to respond to changes in the device,
Increase flexibility and versatility when realizing arithmetic functions
be able to. In particular, when a predetermined sensor is attached to the adapter , the adapter can perform an arithmetic process according to the type of the sensor on the detection data from the sensor and output the data. Even when the arithmetic function is realized, the structure in the sensor or the processing in the receiver does not have to be complicated, and the versatility and flexibility of the sensor can be improved.

[0033]

According to the second and third aspects of the present invention,
The sensing unit according to claim 1 , further comprising a base for connecting the adapter and the sensor to the receiver, wherein the adapter is detachably attached to the base. Since the base is configured such that the sensor can also be directly attached to and detached from the base, for example, when an analog sensor is changed to a differential sensor, it is only necessary to add an adapter. When changing a differential sensor to an analog sensor, just remove the adapter.
Various modes can be realized by simply coping with the addition or removal of the adapter, and the flexibility and versatility can be extremely enhanced.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of an embodiment of a sensing unit according to the present invention.

FIG. 2 is a diagram illustrating a configuration example of an analog sensor.

FIG. 3 is a front view of an embodiment of the sensing unit according to the present invention.

4A is a top view of the sensor shown in FIG. 3, and FIG. 4B is a bottom view of the adapter shown in FIG.

5A is a diagram illustrating a state where the sensor is attached to a base via an adapter, and FIG. 5B is a diagram illustrating a state where the sensor is directly attached to the base.

FIG. 6 is a diagram illustrating a connection example of a sensing unit to a receiver.

FIG. 7 is a configuration diagram of a conventional sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sensing unit 2 Detector 3 Adapter 4 Receiver 5 Base 11 Detector 12 A / D converter 13 Transmitter 14 Receiver 15 Signal processor 16 Data memory 17 Program memory 18 Timer 19 Program selector 30 and 31 Engagement projection 32, 33 groove 41 processor 42 transmission unit 43 storage unit 44 operation unit 45 display unit

Claims (3)

(57) [Claims] 1. A detection section for detecting a predetermined detection target.
For a functioning sensor and detection data from the sensor
An adapter that functions as an operation unit that performs a predetermined operation is separated.
The sensor is detachable from the adapter.
The adapter can be attached freely.
Is a program storage means capable of storing a plurality of types of arithmetic programs according to the type of the sensor, and when a predetermined sensor is attached, an arithmetic program corresponding to the type of the sensor is stored in the program storage means. A program selecting means for selecting from a plurality of types of stored operation programs; and when detection data is sent from the sensor, a predetermined operation is performed on the detection data using the selected operation program. subjected, the sensing unit, characterized in that it has a signal processing unit for outputting. 2. The sensing unit according to claim 1 , wherein
Further, a base for connecting the adapter and the sensor to a receiver is provided, and the adapter is detachably attached to the base. 3. The sensing unit according to claim 2 , wherein
The sensing unit, wherein the adapter is detachably attached to the base, and the sensor is detachably attached directly to the base.