JPH06108990A - Pressure sensor correcting device and air blower control device - Google Patents
Pressure sensor correcting device and air blower control deviceInfo
- Publication number
- JPH06108990A JPH06108990A JP25951292A JP25951292A JPH06108990A JP H06108990 A JPH06108990 A JP H06108990A JP 25951292 A JP25951292 A JP 25951292A JP 25951292 A JP25951292 A JP 25951292A JP H06108990 A JPH06108990 A JP H06108990A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- pressure sensor
- detection
- output
- blower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
- Ventilation (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は差圧センサの出力を補
正する圧力センサ補正装置ならびにそれを用いた送風機
制御装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure sensor correction device for correcting the output of a differential pressure sensor and a blower control device using the pressure sensor correction device.
【０００２】[0002]
【従来の技術】圧力センサを備えた従来の送風機制御装
置は、例えば特開昭６４ー１４５３３号公報や特開平１
ー２２２１３８号公報に示されているようなものがあ
る。これらは基本的には、送風機の機内圧力と機外圧力
の差圧を差圧センサで検出し、この差圧が一定になるよ
うに送風機を制御して定風量を得ようとするものであ
る。2. Description of the Related Art A conventional blower control device equipped with a pressure sensor is disclosed in, for example, Japanese Patent Application Laid-Open No. 64-14533 and Japanese Patent Application Laid-Open No.
There is one such as that shown in Japanese Patent Laid-Open No. 222138. These are basically to detect the differential pressure between the internal pressure of the blower and the external pressure with a differential pressure sensor, and control the blower so that this differential pressure is constant to obtain a constant air volume. .
【０００３】例えば、図６により示した従来装置は、送
風機２０の機内圧力ＰＡと機外圧力ＰＢとの差を検出
し、その差に相当するＤＣ電圧を出力する圧力センサ２
１を備えている。この圧力センサ２１は、送風機２０の
機内圧力導入口２２と機外圧力導入口２３とが接合さ
れ、差圧動作を行なうようになっている。圧力センサ２
１の出力ＤＣ電圧は、マイコンを備えた制御回路２４に
入力される。制御回路２４は圧力センサ２１からの出力
により所定のシーケンス動作を行ない、モータ制御回路
２５を介して送風機２０のモータを制御する。For example, the conventional device shown in FIG. 6 detects a difference between the internal pressure PA and the external pressure PB of the blower 20 and outputs a DC voltage corresponding to the difference.
1 is provided. The pressure sensor 21 is configured such that an in-machine pressure introduction port 22 and an outside-machine pressure introduction port 23 of the blower 20 are joined to perform a differential pressure operation. Pressure sensor 2
The output DC voltage of 1 is input to the control circuit 24 including a microcomputer. The control circuit 24 performs a predetermined sequence operation based on the output from the pressure sensor 21, and controls the motor of the blower 20 via the motor control circuit 25.
【０００４】上記構成の送風機制御装置において、送風
機２０を経由する風の経路内に何らかの異常が生じ、経
路の風の流れＣの圧力損失が上昇すると、機内圧力ＰＡ
と機外圧力ＰＢとの差が増大し、圧力センサ２１の出力
であるＤＣ電圧が増加する。制御回路２４は圧力センサ
２１からの出力により、所定のシーケンス動作を行な
い、機内圧力ＰＡと機外圧力ＰＢとの差が設定された値
になるようにモータ制御回路２５を介して送風機２０の
モータの回転数を制御する。In the blower control device having the above-mentioned configuration, when some abnormality occurs in the path of the wind passing through the blower 20 and the pressure loss of the wind flow C in the path increases, the internal pressure PA
And the external pressure PB increase, and the DC voltage output from the pressure sensor 21 increases. The control circuit 24 performs a predetermined sequence operation based on the output from the pressure sensor 21, and the motor of the blower 20 is controlled via the motor control circuit 25 so that the difference between the internal pressure PA and the external pressure PB becomes a set value. Control the rotation speed of.
【０００５】[0005]
【発明が解決しようとする課題】上記のような送風機制
御装置に使われている圧力センサ２１は、通常図７や図
８に示すように温度変化や経年変化により出力ＤＣ電圧
にドリフト等が発生する不安定なものである。従って、
圧力センサ２１の出力ＤＣ電圧には温度や経年変化に伴
う誤差信号が含まれ、実際の差圧に相当する出力を得る
ことは困難で、送風機２０も圧力センサ２１の誤差を含
んだ検出値に基づいて動作している。上述のドリフトを
例えば、送風機２１を停止させて、この時の機内圧力Ｐ
Ａと機外圧力ＰＢとの差圧が０とすることにより補正す
ることも試みられているものの、送風機２０の停止時に
外風の吹き込みがあったりして差圧０の出力ＤＣ電圧を
得ることは極めて困難である。In the pressure sensor 21 used in the blower control device as described above, a drift or the like is usually generated in the output DC voltage due to temperature change or secular change as shown in FIGS. 7 and 8. It is unstable. Therefore,
The output DC voltage of the pressure sensor 21 includes an error signal due to temperature and aging, and it is difficult to obtain an output corresponding to the actual differential pressure. The blower 20 also detects the detection value including the error of the pressure sensor 21. Is working based. The above-mentioned drift is caused by, for example, stopping the blower 21 and changing the internal pressure P at this time.
Although it has been attempted to correct it by setting the differential pressure between A and the external pressure PB to be 0, it is possible to obtain an output DC voltage with a differential pressure of 0 due to external air blowing when the blower 20 is stopped. Is extremely difficult.
【０００６】この発明はかかる従来の課題を解決するた
めになされたもので、その目的は、圧力センサの温度や
経年変化によるドリフトを確実に補正することができる
圧力センサ補正装置を提供することとともに、この圧力
センサ補正装置により正確な制御動作が可能の送風機制
御装置を提供することである。The present invention has been made in order to solve such a conventional problem, and an object thereof is to provide a pressure sensor correction device capable of surely correcting the drift of the pressure sensor due to the temperature and aging. An object of the present invention is to provide a blower control device capable of performing an accurate control operation by this pressure sensor correction device.
【０００７】[0007]
【課題を解決するための手段】第１の発明に係る圧力セ
ンサ補正装置は、両方の受圧部に加わる圧力の差に相当
する出力ＤＣ電圧又は信号処理によりＤＣ電圧が得られ
る差圧センサに対して、一方の受圧部には検出圧Ａを印
加し、他方の受圧部には切替弁により検出圧Ａ又は検出
圧Ｂのいずれかを切替えて印加できるようにしたもので
ある。A pressure sensor correction device according to a first aspect of the present invention is directed to a differential pressure sensor which is capable of obtaining an output DC voltage corresponding to a pressure difference applied to both pressure receiving portions or a DC voltage obtained by signal processing. Then, the detection pressure A is applied to one pressure receiving portion, and either the detection pressure A or the detection pressure B can be switched and applied to the other pressure receiving portion by the switching valve.
【０００８】第２の発明に係る圧力センサ補正装置は、
特に切替弁の切り替え動作をプランジャやモータを含む
電気駆動装置で行なうようにしたものである。A pressure sensor correction device according to a second invention is
In particular, the switching operation of the switching valve is performed by an electric drive device including a plunger and a motor.
【０００９】第３の発明に係る圧力センサ補正装置は、
両方の受圧部に加わる圧力の差に相当する出力ＤＣ電圧
又は信号処理によりＤＣ電圧が得られる差圧センサに対
して、一方の受圧部には検出圧Ａを印加し、他方の受圧
部には切替弁により検出圧Ａ又は検出圧Ｂのいずれかを
切替えて印加できるようにするとともに、検出圧Ａ同士
を印加した時の差圧センサの出力を誤差信号出力とし
て、検出圧Ａと検出圧Ｂを印加した時の差圧センサの出
力から減算して補正データを得るようにしたものであ
る。A pressure sensor correction device according to a third invention is
For a differential pressure sensor that obtains an output DC voltage corresponding to the difference in pressure applied to both pressure receiving portions or a DC voltage by signal processing, the detection pressure A is applied to one pressure receiving portion and the other pressure receiving portion is applied. Either the detection pressure A or the detection pressure B can be switched and applied by the switching valve, and the output of the differential pressure sensor when the detection pressures A are applied to each other is used as an error signal output to detect the detection pressure A and the detection pressure B. The correction data is obtained by subtracting from the output of the differential pressure sensor when the voltage is applied.
【００１０】第４の発明に係る送風機制御装置は、第３
の発明にかかる圧力センサ補正装置により送風機の風量
が一定になるように送風機モータの回転数を制御するよ
うにしたものである。A blower control device according to a fourth aspect of the present invention is the third aspect.
The pressure sensor correction device according to the invention controls the number of revolutions of the blower motor so that the air volume of the blower becomes constant.
【００１１】第５の発明に係る送風機制御装置は、特に
切替弁の切り替えや補正データの演算及び出力をマイコ
ンにより制御するようにしたものである。The blower controller according to the fifth aspect of the present invention is such that the microcomputer controls the switching of the switching valve and the calculation and output of the correction data.
【００１２】[0012]
【作用】第１の発明においては、切替弁の切り替えによ
り両方の受圧部に同一の検出圧Ａを印加することがで
き、差圧０の状態を強制的に作り出し、検出圧Ａ，Ｂを
印加したときの差圧センサの出力に含まれる誤差分がわ
かり差圧センサの温度や経年変化によるドリフト等の補
正が可能になる。In the first aspect of the present invention, the same detection pressure A can be applied to both pressure receiving parts by switching the switching valve, and the state of differential pressure 0 is forcibly created and the detection pressures A and B are applied. The error included in the output of the differential pressure sensor at this time can be understood, and it becomes possible to correct the temperature of the differential pressure sensor and the drift due to aging.
【００１３】第２の発明においては特に、切替弁の切り
替え動作が容易になり補正動作の制御がし易くなる。In the second aspect of the invention, in particular, the switching operation of the switching valve is facilitated and the correction operation is facilitated.
【００１４】第３の発明においては、差圧センサの温度
や経年変化に伴うドリフトを一緒に補正でき、真正な差
圧センサの出力が得られる。According to the third aspect of the present invention, the temperature of the differential pressure sensor and the drift due to aging can be corrected together, and a true output of the differential pressure sensor can be obtained.
【００１５】第４の発明においては、真正な機内外の差
圧検出に基づく正確な送風機の制御が実現できる。According to the fourth aspect of the invention, accurate control of the blower can be realized based on the genuine detection of the differential pressure between the inside and outside of the machine.
【００１６】第５の発明においては、低コストで真正な
機内外の差圧検出に基づく正確な送風機の制御が実現で
きる。In the fifth aspect of the present invention, it is possible to realize accurate control of the blower based on the genuine detection of the differential pressure between the inside and outside of the machine at low cost.
【００１７】[0017]
実施例１．図１はこの発明の実施例を示す送風機制御装
置の構成図、図２は差圧センサの出力特性の補正方式を
示す説明図である。Example 1. FIG. 1 is a configuration diagram of a blower control device showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing a method of correcting output characteristics of a differential pressure sensor.
【００１８】図１において、送風機１には、二つの受圧
部２，３の圧力差を検出し、その差圧に相当する出力Ｄ
Ｃ電圧を出力する差圧センサ４を備えている。この差圧
センサ４にはその一方の受圧部２に送風機１の機外圧力
導入口５が接合され、他方の受圧部３に圧力センサ補正
装置６の圧力導入口７が接合され、差圧動作を行なうよ
うになっている。差圧センサ４の出圧ＤＣ電圧は、マイ
コンを備えた制御回路８に入力され、制御回路８は差圧
センサ４からの出力により所定のシーケンス動作を行な
い、モータ制御回路９を介して送風機１のモータを制御
する。In FIG. 1, the blower 1 detects a pressure difference between two pressure receiving portions 2 and 3 and outputs an output D corresponding to the pressure difference.
A differential pressure sensor 4 that outputs a C voltage is provided. The differential pressure sensor 4 has one pressure receiving portion 2 joined to the external pressure introduction port 5 of the blower 1, and the other pressure receiving portion 3 joined to the pressure introduction port 7 of the pressure sensor correction device 6 to perform a differential pressure operation. Is designed to do. The output DC voltage of the differential pressure sensor 4 is input to a control circuit 8 equipped with a microcomputer, the control circuit 8 performs a predetermined sequence operation based on the output from the differential pressure sensor 4, and the blower 1 via the motor control circuit 9. Control the motor.
【００１９】圧力センサ補正装置６は、差圧センサ４に
接合する圧力導入口７に連絡する二つの圧力導入部１
０，１１と、切替弁１２及び駆動装置１３とから構成さ
れている。一方の圧力導入部１０は、上記機外圧力導入
口５と同じ圧力を得るべく、機外圧力導入口５の近接位
置に一端が開口され、他方の圧力導入部１１は送風機１
の機内圧力を得るべく送風機１のケーシング内に一端が
開口されている。切替弁１２はプランジャ，ソレノイ
ド，モータ等により構成された電気式の駆動装置１３に
より動作され、いずれか一方の圧力導入部１０，１１と
差圧センサ４に接合する圧力導入口７とを切り替え可能
に連絡する。The pressure sensor correction device 6 includes two pressure introducing portions 1 which communicate with a pressure introducing port 7 joined to the differential pressure sensor 4.
0, 11, a switching valve 12 and a drive device 13. In order to obtain the same pressure as the external pressure introduction port 5, one pressure introduction part 10 has one end opened at a position close to the external pressure introduction port 5, and the other pressure introduction part 11 has the blower 1
One end is opened in the casing of the blower 1 to obtain the in-machine pressure. The switching valve 12 is operated by an electric drive device 13 composed of a plunger, a solenoid, a motor, etc., and can switch between any one of the pressure introducing portions 10 and 11 and the pressure introducing port 7 joined to the differential pressure sensor 4. Contact.
【００２０】上記の構成の送風機制御装置において、送
風機１の運転を開始する時、まず送風機１を停止させた
ままの状態で差圧センサ４の補正を行なう。即ち、圧力
センサ補正装置６の切替弁１２を駆動装置１３により動
かし、圧力導入口７と圧力導入部１０とを導通し、圧力
導入口７と圧力導入部１１とを非導通にする。これによ
り差圧センサ４の受圧部２には機外圧力ＰＢ１が、受圧
部３には機外圧力ＰＢ２がそれぞれ印加される。これら
の機外圧力ＰＢ１とＰＢ２は同圧であるので、差圧セン
サ４には差圧０の状態が作り出されることになる。この
時の差圧センサ４の出力ＤＣ電圧がセンサ出力のオフセ
ット出力電圧、即ち誤差出力信号電圧となる。In the blower controller having the above structure, when the blower 1 is started to operate, first, the differential pressure sensor 4 is corrected while the blower 1 is stopped. That is, the switching valve 12 of the pressure sensor correction device 6 is moved by the drive device 13 so that the pressure introduction port 7 and the pressure introduction part 10 are electrically connected and the pressure introduction port 7 and the pressure introduction part 11 are electrically disconnected. As a result, the external pressure PB1 is applied to the pressure receiving portion 2 of the differential pressure sensor 4, and the external pressure PB2 is applied to the pressure receiving portion 3. Since the external pressures PB1 and PB2 are the same, the differential pressure sensor 4 creates a state where the differential pressure is zero. The output DC voltage of the differential pressure sensor 4 at this time becomes the offset output voltage of the sensor output, that is, the error output signal voltage.
【００２１】図２において、差圧センサ４の初期のセン
サ特性が（ア）で示す直線であり、経年変化で（イ）に
示すように特性が変化したとき、差圧センサ４が０ｍｍ
Ｈ２Ｏ時の出力ＤＣ電圧はＶ１となり、初期に対して△
Ｖｄが経年変化による信号電圧のオフセット分となる。
次に、差圧センサ４の周囲温度が上昇すると、温度上昇
分のドリフトを加えた（ウ）に示す特性となり、この温
度ドリフト分の△ＶＴ１が加算されたＶ２が差圧センサ
４の０ｍｍＨ２Ｏ時の補正分出力ＤＣ電圧となる。従っ
て、このＶ２を０ｍｍＨ２Ｏ時の基点として差圧センサ
４に差圧分の出力ＤＣ電圧が発生することになる。つま
り、上述した圧力センサ補正装置６により差圧センサ４
の補正を行なうことにより、温度と経年変化に伴うドリ
フト分を一緒に計測することができる。In FIG. 2, the initial sensor characteristic of the differential pressure sensor 4 is a straight line shown by (A), and when the characteristic changes as shown in (A) with the lapse of time, the differential pressure sensor 4 becomes 0 mm.
The output DC voltage during H2O is V1, which is
Vd is the offset of the signal voltage due to aging.
Next, when the ambient temperature of the differential pressure sensor 4 rises, the characteristic shown in (c) is added with the drift of the temperature rise, and V2 to which ΔVT1 of this temperature drift is added is 0 mmH2O of the differential pressure sensor 4. The corrected DC output voltage becomes. Therefore, an output DC voltage corresponding to the differential pressure is generated in the differential pressure sensor 4 by using this V2 as a base point at the time of 0 mmH2O. That is, the differential pressure sensor 4 is corrected by the pressure sensor correction device 6 described above.
By performing the correction of, it is possible to measure the temperature and the drift component due to the secular change together.
【００２２】補正による誤差出力信号電圧の測定は、送
風機１を経由する風の経路の内の風の流れＣに外風Ｄが
入っている状態であっても、機外圧力ＰＢ１とＰＢ２は
同一条件で同圧となるので正確さは失われない。補正動
作により得られた誤差出力信号電圧は制御回路８にメモ
リされる。When the error output signal voltage is measured by the correction, the external pressures PB1 and PB2 are the same even when the external wind D is included in the wind flow C in the wind path passing through the blower 1. Accuracy will not be lost because the pressure will be the same under the conditions. The error output signal voltage obtained by the correction operation is stored in the control circuit 8.
【００２３】補正動作の終了後は、圧力センサ補正装置
６の切替弁１２を動かして、圧力導入口７と圧力導入部
１１とを導通し、圧力導入口７と圧力導入部１０とを非
導通にする。これにより差圧センサ４の受圧部２には機
外圧力ＰＢが、受圧部３には機内圧力ＰＡがそれぞれ印
加される。この状態で差圧センサ４の出力ＤＣ電圧から
補正により得られ記憶されている誤差出力信号電圧分を
減算した値が送風機１のモータの制御に使われ、送風機
１の運転をモニタするもとになる。制御回路８はモータ
制御回路９を介して送風機１を所定の風量を得るべく制
御動作することになる。補正動作は適当な時間の経過毎
に実施し、その時誤差出力信号電圧に記憶されている過
去誤差出力信号電圧を更新させていくことになる。After completion of the correction operation, the switching valve 12 of the pressure sensor correction device 6 is moved so that the pressure introduction port 7 and the pressure introduction part 11 are electrically connected and the pressure introduction port 7 and the pressure introduction part 10 are not electrically connected. To As a result, the external pressure PB is applied to the pressure receiving portion 2 of the differential pressure sensor 4, and the internal pressure PA is applied to the pressure receiving portion 3. In this state, the value obtained by subtracting the stored error output signal voltage value obtained by the correction from the output DC voltage of the differential pressure sensor 4 is used for controlling the motor of the blower 1, and the operation of the blower 1 is monitored. Become. The control circuit 8 controls the blower 1 via the motor control circuit 9 so as to obtain a predetermined air volume. The correction operation is performed every time an appropriate time elapses, and the past error output signal voltage stored in the error output signal voltage at that time is updated.
【００２４】実施例２．差圧センサ４の温度及び経年変
化に伴う上述したドリフトの補正は、マイコンを用いて
容易に行なうことができる。図３は制御回路８に組込ん
だマイコンのソフトウェアを示したフローチャートで、
図４は補正動作のタイミングにかかるシーケンスの説明
図である。Example 2. The above-mentioned drift correction due to the temperature and aging of the differential pressure sensor 4 can be easily corrected using a microcomputer. FIG. 3 is a flow chart showing the software of the microcomputer incorporated in the control circuit 8,
FIG. 4 is an explanatory diagram of a sequence relating to the timing of the correction operation.
【００２５】図３及び図４によりマイコンで補正を行な
う制御方式を説明すると、始めに制御を開始する時に圧
力センサ補正装置６を動作させて、差圧センサ４の両受
圧部２，３に機外圧力ＰＢ１，ＰＢ２を印加させ、この
時の差圧センサ４の出力ＤＣ電圧を初期０ｍｍＨ２Ｏ補
正とする。即ち、スタートして直後に０ｍｍＨ２Ｏの補
正時間Ｔｓをセットし、Ｔｓ時間の間圧力センサ補正装
置６の切替弁１２を機外圧力ＰＢ１，ＰＢ２が差圧セン
サ４にかかるようにする。この間送風機１は停止されて
おり、マイコンはこの間に差圧センサ４の出力である誤
差出力信号電圧の値をメモリする。The control system for performing the correction by the microcomputer will be described with reference to FIGS. 3 and 4. When the control is first started, the pressure sensor correction device 6 is operated so that both pressure receiving portions 2 and 3 of the differential pressure sensor 4 are operated. External pressures PB1 and PB2 are applied, and the output DC voltage of the differential pressure sensor 4 at this time is initially corrected to 0 mmH2O. That is, immediately after the start, the correction time Ts of 0 mmH2O is set, and the switching valve 12 of the pressure sensor correction device 6 is made to apply the external pressures PB1 and PB2 to the differential pressure sensor 4 during the time Ts. During this time, the blower 1 is stopped, and the microcomputer stores the value of the error output signal voltage which is the output of the differential pressure sensor 4 during this period.
【００２６】Ｔｓ時間が経過すると、圧力センサ補正装
置６の切替弁１２を機外圧力ＰＢ，と機内圧力ＰＡが差
圧センサ４にかかるようにし、この状態の差圧センサ４
の出力ＤＣ電圧から記憶されている誤差出力信号電圧を
減算した値が算出され、この値に基づいたモータ制御回
路９を介して送風機１が所定の風量を得るべく制御され
る。送風機１の運転がＴｏｎ時間経過すると、再び誤差
出力信号電圧の読み込みのＴｓシーケンスに入る。When the time Ts has elapsed, the switching valve 12 of the pressure sensor correction device 6 is made to apply the external pressure PB and the internal pressure PA to the differential pressure sensor 4, and the differential pressure sensor 4 in this state.
A value obtained by subtracting the stored error output signal voltage from the output DC voltage is calculated, and the blower 1 is controlled to obtain a predetermined air volume via the motor control circuit 9 based on this value. When the operation of the blower 1 elapses Ton time, the Ts sequence for reading the error output signal voltage starts again.
【００２７】スタートしてＴｓ時間が経過したかどうか
の判断で、Ｔｓ時間が経過していなければ、送風機１を
停止して０ｍｍＨ２Ｏの補正動作を行ない、次のステッ
プで初期補正データかどうか判断される。初期補正デー
タでなければ始めのＴｓシーケンスに戻り、初期補正デ
ータであれば、次のステップで計測データとの間に設定
値以上の差があるかどうかが判断される。差がなければ
始めのＴｓシーケンスに戻り、差があればアラーム動作
等の警報動作のステップに進む。When the time Ts has elapsed after the start, if the time Ts has not elapsed, the blower 1 is stopped and the correction operation of 0 mmH2O is performed. In the next step, it is determined whether it is the initial correction data. It If it is not the initial correction data, the process returns to the first Ts sequence, and if it is the initial correction data, it is judged in the next step whether or not there is a difference of at least the set value with the measurement data. If there is no difference, the process returns to the first Ts sequence, and if there is a difference, the process proceeds to a warning operation step such as an alarm operation.
【００２８】なお、０ｍｍＨ２Ｏの補正動作のＴｓ時間
については、図５に示すように圧力センサ補正装置６を
動作させた後ある時間Ｔｓ２を経過してからマイコンに
よる補正計測を行なうようにするほうが安定した補正デ
ータが得られる。即ち、Ｔｓ２時間の間は、送風機１の
慣性による回転や差圧センサ４のチャタリング等０ｍｍ
Ｈ２Ｏの補正には不都合な要因があり、Ｔｓ２時間を経
過してから計測することによりこれらの不都合な要因を
排除することができる。Regarding the Ts time of the correction operation of 0 mmH2O, it is more stable to perform the correction measurement by the microcomputer after a certain time Ts2 has elapsed after the pressure sensor correction device 6 was operated as shown in FIG. The corrected data obtained is obtained. That is, during Ts2 hours, the rotation due to the inertia of the blower 1 and the chattering of the differential pressure sensor 4 are 0 mm.
There are inconvenient factors in the correction of H2O, and these inconvenient factors can be eliminated by measuring after Ts2 time has elapsed.
【００２９】[0029]
【発明の効果】以上実施例による説明からも明らかなよ
うに、第１の発明によれば切替弁の切り替えにより差圧
センサの両方の受圧部に同一の検出圧Ａを印加すること
ができ、差圧０の状態を強制的に作り出し、検出圧Ａ，
Ｂを印加したときの差圧センサの出力に含まれる誤差分
が測定でき、差圧センサの温度や経年変化に伴うドリフ
ト等の補正が可能になる。As is apparent from the above description of the embodiment, according to the first invention, the same detection pressure A can be applied to both pressure receiving portions of the differential pressure sensor by switching the switching valve. The pressure difference 0 is forcibly created and the detected pressure A,
It is possible to measure the error included in the output of the differential pressure sensor when B is applied, and it is possible to correct the temperature of the differential pressure sensor and the drift associated with aging.
【００３０】第２の発明によれば、特に切替弁の切り替
え動作が容易になり補正動作の制御がし易くなる。According to the second aspect of the invention, the switching operation of the switching valve is particularly facilitated, and the correction operation is easily controlled.
【００３１】第３の発明によれば、差圧センサの温度や
経年変化に伴うドリフトを一緒に補正でき、真正な差圧
センサの出力が得られる。According to the third aspect of the present invention, the temperature of the differential pressure sensor and the drift due to aging can be corrected together, and a true output of the differential pressure sensor can be obtained.
【００３２】第４の発明によれば、真正な機内外の差圧
検出に基ずく正確度の高い送風機の制御が実現する。According to the fourth aspect of the invention, highly accurate control of the blower is realized based on the genuine detection of the differential pressure between the inside and outside of the machine.
【００３３】第５の発明によれば、低コストで真正な機
内外の差圧検出に基づく正確度の高い送風機の制御が実
現する。According to the fifth aspect of the invention, it is possible to realize a highly accurate control of the blower based on the genuine detection of the differential pressure between the inside and outside of the machine at low cost.
【図１】この発明の実施例を示す送風機制御装置の構成
図である。FIG. 1 is a configuration diagram of a blower control device showing an embodiment of the present invention.
【図２】同じく実施例の差圧センサの出力特性の補正方
式を示す説明図である。FIG. 2 is an explanatory diagram showing a method of correcting the output characteristic of the differential pressure sensor of the embodiment.
【図３】制御回路に組込んだマイコンのソフトウェアを
示したフローチャートである。FIG. 3 is a flowchart showing software of a microcomputer incorporated in a control circuit.
【図４】補正動作のタイミングにかかるシーケンスの説
明図である。FIG. 4 is an explanatory diagram of a sequence related to a timing of a correction operation.
【図５】補正動作のタイミングにかかるシーケンスの説
明図である。FIG. 5 is an explanatory diagram of a sequence relating to a timing of a correction operation.
【図６】従来の送風機制御装置の構成図である。FIG. 6 is a configuration diagram of a conventional blower control device.
【図７】圧力センサの温度変化による出力特性を示す説
明図である。FIG. 7 is an explanatory diagram showing an output characteristic of a pressure sensor due to a temperature change.
【図８】圧力センサの経年変化による出力特性を示した
説明図である。FIG. 8 is an explanatory diagram showing output characteristics of the pressure sensor due to secular change.
１ 送風機 ２ 受圧部 ３ 受圧部 ４ 差圧センサ ５ 機外圧力導入口 ６ 圧力センサ補正装置 ７ 圧力導入口 ８ 制御回路 ９ モータ制御回路 １０ 圧力導入部 １１ 圧力導入部 １２ 切替弁 １３ 駆動装置 DESCRIPTION OF SYMBOLS 1 Blower 2 Pressure receiving part 3 Pressure receiving part 4 Differential pressure sensor 5 External pressure introducing port 6 Pressure sensor correction device 7 Pressure introducing port 8 Control circuit 9 Motor control circuit 10 Pressure introducing part 11 Pressure introducing part 12 Switching valve 13 Driving device
Claims (5)
る出力ＤＣ電圧又は信号処理によりＤＣ電圧が得られる
差圧センサに対して、一方の受圧部には検出圧Ａを印加
し、他方の受圧部には切替弁により検出圧Ａ又は検出圧
Ｂのいずれかを切替えて印加できるようにしたことを特
徴とする圧力センサ補正装置。1. A detection pressure A is applied to one pressure receiving portion of a differential pressure sensor in which an output DC voltage corresponding to a pressure difference applied to both pressure receiving portions or a DC voltage is obtained by signal processing, and the other is applied. The pressure sensor correction device is characterized in that either the detection pressure A or the detection pressure B can be switched and applied to the pressure receiving portion by a switching valve.
行なう構成の請求項１に記載の圧力センサ補正装置。2. The pressure sensor correction device according to claim 1, wherein the switching operation of the switching valve is performed by an electric drive device.
る出力ＤＣ電圧又は信号処理によりＤＣ電圧が得られる
差圧センサに対して、一方の受圧部には検出圧Ａを印加
し、他方の受圧部には切替弁により検出圧Ａ又は検出圧
Ｂのいずれかを切替えて印加できるようにするととも
に、検出圧Ａ同士を印加した時の差圧センサの出力を誤
差信号出力として、検出圧Ａと検出圧Ｂを印加した時の
差圧センサの出力から減算して補正データを得るように
したことを特徴とする圧力センサ補正装置。3. A differential pressure sensor in which an output DC voltage corresponding to a difference between pressures applied to both pressure receiving portions or a DC voltage is obtained by signal processing, a detection pressure A is applied to one pressure receiving portion, and the other is applied. The detection valve A can be switched between the detection pressure A and the detection pressure B by applying a switching valve, and the output of the differential pressure sensor when the detection pressures A are applied as an error signal output. A pressure sensor correction device, wherein correction data is obtained by subtracting A and a detection pressure B from an output of a differential pressure sensor when applied.
る出力ＤＣ電圧又は信号処理によりＤＣ電圧が得られる
差圧センサに対して、一方の受圧部には検出圧Ａとして
送風機の機外圧力を印加し、他方の受圧部には切替弁に
より検出圧Ａ又は検出圧Ｂのいずれかを切替えて印加で
きるようにするとともに、検出圧Ｂを上記送風機の機内
圧力とし、検出圧Ａ同士を印加した時の差圧センサの出
力電圧を、検出圧Ａと検出圧Ｂを印加した時の差圧セン
サの出力電圧から減じた補正データに基づき送風機の風
量が一定になるように送風機モータの回転数を制御する
ようにしたことを特徴とする送風機制御装置。4. A differential pressure sensor that obtains an output DC voltage corresponding to a difference in pressure applied to both pressure receiving portions or a DC voltage by signal processing, whereas one pressure receiving portion has a detection pressure A as an outside of the blower. A pressure is applied, and either the detection pressure A or the detection pressure B can be switched and applied to the other pressure receiving portion by a switching valve, and the detection pressure B is set as the internal pressure of the blower, and the detection pressures A are Rotation of the blower motor so that the air volume of the blower becomes constant based on the correction data that the output voltage of the differential pressure sensor when applied is subtracted from the output voltage of the differential pressure sensor when the detection pressure A and the detection pressure B are applied. A blower control device characterized in that the number is controlled.
び出力をマイコンにより行なうようにしたことを特徴と
する請求項３に記載の送風機制御装置。5. The blower controller according to claim 3, wherein switching of the switching valve and calculation and output of correction data are performed by a microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4259512A JP2751756B2 (en) | 1992-09-29 | 1992-09-29 | Pressure sensor correction device and blower control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4259512A JP2751756B2 (en) | 1992-09-29 | 1992-09-29 | Pressure sensor correction device and blower control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06108990A true JPH06108990A (en) | 1994-04-19 |
| JP2751756B2 JP2751756B2 (en) | 1998-05-18 |
Family
ID=17335138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4259512A Expired - Fee Related JP2751756B2 (en) | 1992-09-29 | 1992-09-29 | Pressure sensor correction device and blower control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2751756B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101298208B1 (en) * | 2011-10-18 | 2013-08-22 | 대우조선해양 주식회사 | System for detecting the driving state of blower |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01222138A (en) * | 1988-03-01 | 1989-09-05 | Matsushita Seiko Co Ltd | Air flow control device for blower |
| JPH0450743A (en) * | 1990-06-19 | 1992-02-19 | Toshiba Corp | Differential pressure transmitter |
-
1992
- 1992-09-29 JP JP4259512A patent/JP2751756B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01222138A (en) * | 1988-03-01 | 1989-09-05 | Matsushita Seiko Co Ltd | Air flow control device for blower |
| JPH0450743A (en) * | 1990-06-19 | 1992-02-19 | Toshiba Corp | Differential pressure transmitter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101298208B1 (en) * | 2011-10-18 | 2013-08-22 | 대우조선해양 주식회사 | System for detecting the driving state of blower |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2751756B2 (en) | 1998-05-18 |
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