JP2751756B2 - Pressure sensor correction device and blower control device - Google Patents
Pressure sensor correction device and blower control deviceInfo
- Publication number
- JP2751756B2 JP2751756B2 JP4259512A JP25951292A JP2751756B2 JP 2751756 B2 JP2751756 B2 JP 2751756B2 JP 4259512 A JP4259512 A JP 4259512A JP 25951292 A JP25951292 A JP 25951292A JP 2751756 B2 JP2751756 B2 JP 2751756B2
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- Japan
- Prior art keywords
- pressure
- detection
- pressure sensor
- voltage
- output
- 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.)
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Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
- Ventilation (AREA)
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 same.
【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 having a pressure sensor is disclosed in, for example, Japanese Patent Application Laid-Open No.
-222138. Basically, these are to detect the differential pressure between the internal pressure and the external pressure of the blower with a differential pressure sensor, and to control the blower so that the differential pressure becomes 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 internal pressure introduction port 22 and an external 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 a control circuit 24 having 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-described structure, if any abnormality occurs in the wind path passing through the blower 20 and the pressure loss of the wind flow C in the path increases, the in-machine pressure PA
And the external pressure PB increases, 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 controls the motor of the blower 20 via the motor control circuit 25 so that the difference between the internal pressure PA and the external pressure PB becomes a set value. To control the number of revolutions.
【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。The pressure sensor 21 used in the above-described blower control device usually generates a drift or the like in the output DC voltage due to a temperature change or an aging change as shown in FIGS. To be 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. Working based on. The above-mentioned drift is caused, for example, by stopping the blower 21 and setting the internal pressure P at this time.
Although an attempt has been made to compensate by setting the differential pressure between A and the external pressure PB to 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。SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object thereof is to provide a pressure sensor correction device capable of surely correcting drift due to temperature and aging of a pressure sensor. Another object of the present invention is to provide a blower control device capable of performing an accurate control operation using the 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出来るようにし、前記両
方の受圧部に検出圧Ａを印加したとき差圧０状態にな
り、このときの差圧センサの出力ＤＣ電圧がセンサ出力
の誤差出力信号電圧となるものである。According to a first aspect of the present invention, there is provided a pressure sensor correcting device for an output DC voltage corresponding to a difference between pressures applied to both pressure receiving portions or a differential pressure sensor which can obtain a DC voltage by signal processing. Te, on one of the pressure receiving portion by applying a detection voltage a, the other of the pressure receiving portion to be able to apply to switch the one of the detection pressure a or detected pressure B by the switching valve, wherein both
When the detection pressure A is applied to the pressure receiving part, the differential pressure becomes zero.
The output DC voltage of the differential pressure sensor at this time is
Is the error output signal voltage .
【０００８】第２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
又は処理信号により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。[0008] A pressure sensor correction device according to a second aspect of the present invention comprises:
Output DC voltage corresponding to the difference between the pressures applied to both pressure receiving parts
Or for a differential pressure sensor that can obtain a DC voltage by a processing signal.
Then, the detection pressure A is applied to one pressure receiving portion, and the other pressure receiving portion is applied.
In the part, either the detection pressure A or the detection pressure B is provided by the switching valve.
It is possible to switch and apply, and the detection pressures A
The output of the differential pressure sensor when
Output of the differential pressure sensor when the detection pressure A and the detection pressure B are applied.
The correction data is obtained by subtracting from the force .
【０００９】第３の発明に係る送風機制御装置は、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
処理信号により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サンサの出力電圧を、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もので
ある。A third fan control device according to the invention, both
Output DC voltage corresponding to the difference in pressure applied to the pressure receiving part of
For a differential pressure sensor that can obtain a DC voltage by a processing signal
The external pressure of the blower is set as the detected pressure A at one pressure receiving part.
Is applied to the other pressure-receiving portion by the detection valve A or
If one of the detection pressures B can be switched and applied
In both cases, the detected pressure B is taken as the pressure inside the blower, and the detected pressure
The output voltage of the differential pressure sensor when two
From the output voltage of the differential pressure sensor when A and detection pressure B are applied
The air volume of the blower will be constant based on the reduced correction data
Thus, the rotation speed of the blower motor is controlled .
【００１０】第４の発明に係る送風機制御装置は、補正
動作により得られた誤差出力信号電圧を制御回路にメモ
リし、適当な時間毎に更新させるようにしたものであ
る。[0010] The fourth blower control device according to the invention, the correction
Write the error output signal voltage obtained by the operation to the control circuit.
And updated at appropriate time intervals .
【００１１】第５の発明に係る送風機制御装置は、圧力
補正センサを動作後所定時間経過後マイコンによる補正
計測を行うようにしたものである。[0011] The fifth blower control device according to the invention, the pressure
Correction by microcomputer after a predetermined time has elapsed after operation of the correction sensor
The measurement is performed .
【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, a state of zero differential pressure is forcibly created, and the detection pressures A and B are applied. The error included in the output of the differential pressure sensor at the time of the above is known, and it becomes possible to correct the temperature of the differential pressure sensor and 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 invention, in particular, the switching operation of the switching valve is facilitated, and the correction operation is easily controlled.
【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, the drift of the differential pressure sensor due to temperature and aging can be corrected together, and the output of the genuine 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 present invention, accurate blower control can be realized based on the detection of a genuine 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。According to the fifth aspect of the present invention, accurate blower control can be realized at low cost based on the genuine differential pressure detection between the inside and outside of the machine.
【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。Embodiment 1 FIG. 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, a blower 1 detects a pressure difference between two pressure receiving sections 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 connected to an external pressure inlet 5 of the blower 1 and the other pressure receiving portion 3 connected to a pressure inlet 7 of a pressure sensor correction device 6. Is to be performed. The output DC voltage of the differential pressure sensor 4 is input to a control circuit 8 having a microcomputer, and the control circuit 8 performs a predetermined sequence operation based on an output from the differential pressure sensor 4, To 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 correcting device 6 comprises two pressure introducing portions 1 connected to a pressure introducing port 7 joined to the differential pressure sensor 4.
0, 11, a switching valve 12 and a driving device 13. One pressure introduction unit 10 has one end opened at a position close to the external pressure introduction port 5 so as to obtain the same pressure as the external pressure introduction port 5, and the other pressure introduction unit 11 has the blower 1.
One end is opened in the casing of the blower 1 in order to obtain the in-machine pressure. The switching valve 12 is operated by an electric driving device 13 including a plunger, a solenoid, a motor, and the like, and can switch between one of the pressure introduction portions 10 and 11 and the pressure introduction port 7 connected 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 control device having the above configuration, when the operation of the blower 1 is started, 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 driving device 13 to make the pressure introduction port 7 and the pressure introduction section 10 conductive, and to make the pressure introduction port 7 and the pressure introduction section 11 non-conductive. 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 these external pressures PB1 and PB2 are the same, a state of zero differential pressure is created in the differential pressure sensor 4. The output DC voltage of the differential pressure sensor 4 at this time becomes an offset output voltage of the sensor output, that is, an 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 in FIG. 2A, and when the characteristic changes as shown in FIG.
The output DC voltage at the time of H2O becomes V1, which is △
Vd is the signal voltage offset due to aging.
Next, when the ambient temperature of the differential pressure sensor 4 rises, the characteristic shown in (c) is obtained by adding a drift corresponding to the temperature rise, and V2 to which ΔVT1 for this temperature drift is added is 0 mmH2O of the differential pressure sensor 4 , The output DC voltage. Therefore, an output DC voltage corresponding to the differential pressure is generated in the differential pressure sensor 4 with this V2 as a base point at the time of 0 mmH2O. That is, the differential pressure sensor 4 is
, It is possible to measure the temperature and the drift due to aging 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。The measurement of the error output signal voltage by the correction indicates that the external pressures PB1 and PB2 are the same even when the external wind D is contained in the wind flow C in the wind path passing through the blower 1. Accuracy is not lost because the pressure is 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 the completion of the correcting operation, the switching valve 12 of the pressure sensor correcting device 6 is operated to make the pressure introducing port 7 and the pressure introducing section 11 conductive, and to make the pressure introducing port 7 and the pressure introducing section 10 non-conductive. 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 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 to obtain a predetermined air volume. The correction operation is performed every elapse of an appropriate time, 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。Embodiment 2 FIG. The above-mentioned drift caused by the temperature and aging of the differential pressure sensor 4 can be easily corrected using a microcomputer. FIG. 3 is a flowchart showing the software of the microcomputer incorporated in the control circuit 8,
FIG. 4 is an explanatory diagram of a sequence related 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。3 and 4, a description will be given of a control method in which the microcomputer performs the correction. First, when the control is started, the pressure sensor correction device 6 is operated to apply the pressure to the pressure receiving portions 2 and 3 of the differential pressure sensor 4. External pressures PB1 and PB2 are applied, and the output DC voltage of the differential pressure sensor 4 at this time is corrected to an initial value of 0 mmH2O. That is, immediately after the start, the correction time Ts of 0 mmH2O is set, and during the time Ts, the switching valve 12 of the pressure sensor correction device 6 is set so that the external pressures PB1 and PB2 are applied to the differential pressure sensor 4. 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 time.
【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。After the elapse of the time Ts, the switching valve 12 of the pressure sensor correction device 6 is set so that the external pressure PB and the internal pressure PA are applied to the differential pressure sensor 4.
A value obtained by subtracting the stored error output signal voltage from the output DC voltage is calculated, and the blower 1 is controlled via the motor control circuit 9 based on this value to obtain a predetermined air volume. When the operation of the blower 1 elapses the Ton time, the process again enters the Ts sequence of reading the error output signal voltage.
【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 it is determined whether or not the Ts time has elapsed since the start, if the Ts time has not elapsed, the blower 1 is stopped and a correction operation of 0 mmH2O is performed. You. If the data is not the initial correction data, the process returns to the initial Ts sequence. If the data is the initial correction data, it is determined in the next step whether or not there is a difference between the measured data and the set value. If there is no difference, the process returns to the initial Ts sequence. If there is a difference, the process proceeds to an alarm 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。As for the Ts time of the 0 mmH2O correction operation, 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 has been operated as shown in FIG. Corrected data is obtained. That is, during the time period Ts2, rotation by the inertia of the blower 1 and chattering of the differential pressure sensor 4 are 0 mm.
There are inconvenient factors in the correction of H2O, and by measuring after elapse of Ts2 time, these inconvenient factors can be eliminated.
【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替により差圧セン
サの両方の受圧部に同一の検出圧Ａを印加して差圧０状
態を作り、その時の誤差を誤差出力電圧とするので正確
な補正値が得られる。As is clear from the above description of the embodiment, according to the first aspect of the invention, the same detection pressure A is applied to both the pressure receiving portions of the differential pressure sensor by switching the switching valve, and the differential pressure becomes zero. Condition
Condition, and the error at that time is used as the error output voltage.
Correction values can be obtained .
【００３０】第２の発明によれば、差圧センサの温度や
経年変化に伴う誤差分を一緒に補正でき、真正な差圧セ
ンサの出力がえられる。According to the second aspect, the temperature of the differential pressure sensor is
Errors due to aging can be corrected together, and a genuine differential pressure
The sensor output is obtained .
【００３１】第３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できる。According to the third invention, a genuine differential pressure between the inside and outside of the machine is provided.
It is possible to control the blower with high accuracy based on the detection .
【００３２】第４の発明によれば、適当な時間毎にセン
サの補正値が更新されるので、常に最新のデータによる
精度の高い送風機の制御ができる。[0032] According to the fourth aspect , the sensor is transmitted at appropriate time intervals.
The correction value is updated, so always use the latest data.
Highly accurate blower control is possible .
【００３３】第５の発明によれば、圧力サンサ補正装置
を動作後、所定時間経過後にマイコンによる補正計測を
おこなうので、安定した補正データが得られ正確な送風
機の制御が出来る。According to the fifth invention, a pressure sensor correction device
After the specified time has elapsed, the correction measurement by the microcomputer is performed.
So that stable correction data can be obtained and accurate ventilation
Can control the machine .
【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 output characteristics 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 related 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 output characteristics 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 over time.
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 REFERENCE SIGNS LIST 1 blower 2 pressure receiving part 3 pressure receiving part 4 differential pressure sensor 5 external pressure inlet 6 pressure sensor correction device 7 pressure inlet 8 control circuit 9 motor control circuit 10 pressure inlet 11 pressure inlet 12 switching valve 13 drive
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出来るようにし、前記両方
の受圧部に検出圧Ａを印加したとき差圧０状態になり、
このときの差圧センサの出力ＤＣ電圧がセンサ出力の誤
差出力信号電圧となることを特徴とする圧力センサ補正
装置。An output DC voltage corresponding to a difference between pressures applied to both pressure receiving portions or a differential pressure sensor which obtains a DC voltage by signal processing, a detection pressure A is applied to one pressure receiving portion, and the other is applied. the pressure receiving portion to be able to apply to switch the one of the detection pressure a or detected pressure B by the switching valve, wherein both
When the detection pressure A is applied to the pressure receiving portion, the differential pressure becomes zero,
The output DC voltage of the differential pressure sensor at this time is
A pressure sensor correction device, which is a differential output signal voltage .
る出力ＤＣ電圧又は処理信号により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。2. The method according to claim 1, wherein the pressure difference corresponds to a difference between pressures applied to both pressure receiving portions.
Output DC voltage or DC voltage is obtained by processing signal
Apply detection pressure A to one pressure receiving part for differential pressure sensor
The other pressure-receiving part detects the detection pressure A or the detection pressure by the switching valve.
It is possible to switch any of B to apply
Output of the differential pressure sensor when the detection pressures A are applied to each other
When the detection pressure A and the detection pressure B are applied as the difference signal output
To obtain correction data by subtracting from the output of the differential pressure sensor
A pressure sensor correction device, characterized in that:
る出力ＤＣ電圧又は処理信号により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サンサの出
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。3. A pressure difference corresponding to a difference between pressures applied to both pressure receiving portions.
Output DC voltage or DC voltage is obtained by processing signal
For the differential pressure sensor, the detection pressure A is
Apply the external pressure of the blower, and set the other pressure
By switching either the detection pressure A or the detection pressure B
And the detected pressure B is adjusted in the air blower.
Pressure, and the differential pressure sensor when the detection pressures A are applied
When the detection voltage A and the detection pressure B are applied,
Air blower based on the correction data subtracted from the
Control the number of rotations of the blower motor so that the amount is constant
A blower control device, characterized in that:
圧を制御回路にメモリし、適当な時間毎に更新させるこ
とを特徴とする請求項３に記載の送風機制御装置。4. An error output signal obtained by a correction operation.
The pressure is stored in the control circuit and updated at appropriate intervals.
The blower control device according to claim 3, wherein:
マイコンによる補正計測を行うことを特徴とする請求項
３に記載の送風機制御装置。5. After a predetermined time has elapsed after operating the pressure correction sensor.
Wherein the correction measurement is performed by a microcomputer.
4. The blower control device according to 3 .
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 JPH06108990A (en) | 1994-04-19 |
| JP2751756B2 true 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) |
Families Citing this family (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 |
Family Cites Families (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06108990A (en) | 1994-04-19 |
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