CN2231413Y - Pressure transmitting controller - Google Patents
Pressure transmitting controller Download PDFInfo
- Publication number
- CN2231413Y CN2231413Y CN 95222644 CN95222644U CN2231413Y CN 2231413 Y CN2231413 Y CN 2231413Y CN 95222644 CN95222644 CN 95222644 CN 95222644 U CN95222644 U CN 95222644U CN 2231413 Y CN2231413 Y CN 2231413Y
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- CN
- China
- Prior art keywords
- pressure
- amplifier
- reference voltage
- hysteresis loop
- relay
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a measuring device, particularly a pressure transmitting controller combined with the functions of pressure measurement and display, pressure signal transmission and field control. The pressure transmitting controller can be used for replacing a mechanical pressure gauge with a spring or a pressure gauge with electrical contacts. The pressure transmitting controller comprises a pressure sensor, a sensing signal amplifier connected by a voltage amplifier and hysteresis comparators, a V/I converter for transmitting pressure signal, an A/D converter, a display and relay controllers. A plurality of hysteresis comparators and relay controllers can be arranged, the output characteristics of relays are the same, and the relays are all provided with relay contacts with comparative hysteresis characteristics and independently adjustable high limiting value and low limiting value.
Description
The utility model relates to a kind of measurement mechanism, relates to a kind of pressure survey control device or rather.
In pressure survey, the signal is far passed and the control system in industries such as electric power, oil, chemical industry, metallurgy and machinery, a large amount of at present tensimeters that use the spring mechanical pressure gauge or electric contact is arranged, show force value and do control on the spot, with pressure unit pressure signal is transformed to current signal or voltage signal teletransmission to central control room again.Owing in application, be not to use the integral type instrument, thereby wiring is many, failure rate is high, poor reliability, uses also extremely inconvenient.
To be that design is a kind of integrate pressure survey demonstration, pressure signal and become and send and the pressure inverting controller of three kinds of functions of field control the purpose of this utility model, and the tensimeter that can directly replace original use is used.
Pressure inverting controller of the present utility model by pressure transducer, sensor amplifier, finish pressure signal and become voltage current transducer, A/D conversion and display and the relay-operated controller send and constitute, is characterized in that:
Reference voltage circuit and hysteresis loop comparator that described sensor amplifier produces upper limit reference voltage value and lower limit reference voltage value by voltage amplifier, respectively connect and compose, the described pressure transducer of voltage amplifier input termination, voltage amplifier output terminal and reference voltage circuit output terminal connect the hysteresis loop comparator input end respectively, the control end of the described relay-operated controller of hysteresis loop comparator output termination.
Described hysteresis loop comparator comprises first, second integrated operational amplifier and the trigger that is made of the cross connection of two Sheffer stroke gate head and the tail, the in-phase input end of first, second integrated operational amplifier connects the upper and lower limit reference voltage value output terminal of described reference voltage circuit respectively, the inverting input of first, second integrated operational amplifier also connects described voltage amplifier output terminal, and the output terminal of first, second integrated operational amplifier connects an input end of two Sheffer stroke gates respectively.
Described pressure transducer is the foil resistance strain pressure transducer.
Described relay-operated controller is provided with the 2-10 road, described hysteresis loop comparator, the corresponding setting of reference voltage circuit with relay-operated controller, and the pressure signal input end of each hysteresis loop comparator is attempted by on the output terminal of described voltage amplifier.
Pressure inverting controller of the present utility model adopts all electronic structure, the instrument of difference in functionality, the gauge head structure of instrument being combined into one after optimizing circuit design will be finished originally, obtain on-the-spot pressure signal by pressure transducer, pressure signal amplifier by the band hysteresis loop comparator, make controller have the hysteretic characteristic that upper and lower limit all can be adjusted separately, the user can set the scope of being controlled easily as required, come the duty of pilot relay, reach the purpose of control field apparatus, device then.Designed voltage current transducer send electric current with the change that pressure signal is transformed to 4-20mA, is convenient to the user and makes centralized control.Designed A/D conversion and display can show the upper and lower limit reference value of each road control and the pressure measuring value of sensor.
Below in conjunction with an enforcement structure, further specify technology of the present utility model with pressure inverting controller of No. five relay-operated controllers.
Fig. 1. the pressure unit theory diagram
Fig. 2. voltage amplifier and voltage current transducer are implemented circuit diagram among Fig. 1
Fig. 3. reference voltage circuit and hysteresis loop comparator are implemented circuit diagram among Fig. 1
Fig. 4. A/D conversion and display circuit among Fig. 1
Fig. 5. Fig. 1 repeat circuit controller circuitry figure
Fig. 6. pressure inverting controller contour structures planimetric map
Fig. 7. pressure inverting controller contour structures side view
Referring to Fig. 1,10 is pressure transducer among the figure, embodiment adopts foil resistance strain transducer (Ministry of Aerospace Industry 701 produces), though the sensitivity of resistance strain type sensor is lower, but because the popularizing of the operational amplifier of high-gain, low noise, low drift in the current electronic technology, be not difficult to solve for the amplification of tiny signal, so get the characteristics that its long-time stability are good, the nonlinearity erron index is good, whole pressure inverting controller is remained in the design accuracy for a long time because sensor performance is stable.P is a pressure spot among the figure.
20 is regulator rectifier circuit, output ± 5V voltage and+18V voltage.
40 for voltage amplifier is amplified to 0-1V with the pressure transducer output voltage of 0-10mV, and voltage amplifier 40 outputs are sent the pressure signal input end of voltage current transducer 50, hysteresis loop comparator 61,62,63,64,65 and sent A/D conversion and display 30 through switch SW 6A, SW6B.
A/D conversion and display 30 are used to show the force value of detection or pass through switch SW 1H ... SW5H, SW1L ... SW5L shows the upper and lower limit reference value that sets.Embodiment adopts 31/2 display.
Potentiometer W1H ... W5H, W1L ... W5L constitutes reference voltage circuit, is used to adjust upper limit reference voltage value and lower limit reference voltage value, is independent adjustment.
61 ... 65 is hysteresis loop comparator, and the upper and lower limit reference value of detected pressure value and setting is made comparisons, and comparative result is used for pilot relay controller 71 to 75.J1 among the figure (19,20,21) ... J5 (7,8,9) is the contact of each relay, is the hysteresis comparative characteristic relay output contact that five tunnel bounds can be adjusted respectively, can participate in electrical equipment control directly.If bound is set at identical value, then the characteristic of relay is single limit comparative characteristic.Redirect switch S 1 among the figure ... S5 is the hysteretic characteristic selector switch, can change the direction of each hysteresis loop comparator hysteretic characteristic.
Referring to Fig. 2, be the enforcement circuit of voltage amplifier and voltage current transducer.The low drift of employing, chopping modulation demodulator amplifier IC2 (ICL7650) and transport and placing device IC3 (CA741T) that the amplifier performance is good constitute voltage amplifier, IC3 output 0-1V detection voltage, and connector J2 is used to connect pressure transducer.A, B are connected with A, B among Fig. 3 respectively among the figure.
Transport and placing device IC4, IC5, IC12 (CA741T), triode T2 and peripheral cell thereof constitute voltage current transducer (comprising summation, anti-phase and V/I conversion), and the normalized current signal of 4-20mA is exported by connector J21.Summer IC4 is set is when in pressure detection being zero, still can keep the normalized current output of 4mA.
Referring to Fig. 3, be five road hysteresis loop comparators and reference voltage circuit.Transport and placing device IC8:A, IC8:B (CA324) and Sheffer stroke gate IC6:A, IC6:B (74LSOO) constitute one road hysteresis loop comparator, and all the other four line structures are identical with it, repeat no more.The redirect switch is used to select original state (0 or 1).Potentiometer P1-P10 is used to adjust the upper and lower limit reference voltage on each road, and C, D are connected with C, D among Fig. 4 respectively among the figure.
Referring to Fig. 4, A/D conversion and display adopt 31/2 digital indicator IC1 (ICL7107) and anode LED altogether, have good performance index, show that eye-catching, penetration power is convenient to reading by force, can show detected pressure value and 5 road upper and lower limit reference voltage values.
Referring to Fig. 5, be No. five relay-operated controllers, connector J4 is connected with J1 among Fig. 3, is used to insert each road hysteresis loop comparator output state.Relay K 1-K5 is driven by transistor circuit T3-T7 respectively, and relay contact connects each electric equipment by connector J10.
Referring to Fig. 6, Fig. 7 is the contour structures of pressure inverting controller, is of a size of full-size among the figure, and its installation dimension and spring mechanical formula tensimeter are compatible entirely.
Pressure inverting controller of the present utility model, integrate pressure survey demonstration, pressure signal 4-20mA become give, three kinds of functions of relay control, in industrial systems such as electric power, oil, chemical industry, metallurgy, have broad application prospects, especially be lower than or be bordering in 100 ℃ the systems such as water, oil, gas in the actuating medium temperature and can replace original tensimeter, and the change that can carry out pressure signal is on the spot sent and parameter is controlled, and remote transfer signal to central control room can increase new control function.The pressure inverting controller also can cooperate with variable-frequence governor, silicon controlled speed regulator forms Closed-Loop Speed Governing System, realizes the automatic control of high building water tank water tower, and energy-saving effect is good.
Claims (4)
1. pressure inverting controller by pressure transducer, sensor amplifier, finish pressure signal and become voltage current transducer, A/D conversion and the display and the relay-operated controller that send and constitute, is characterized in that:
Reference voltage circuit and hysteresis loop comparator that described sensor amplifier produces upper limit reference voltage value and lower limit reference voltage value by voltage amplifier, respectively connect and compose, the described pressure transducer of voltage amplifier input termination, voltage amplifier output terminal and reference voltage circuit output terminal connect the hysteresis loop comparator input end respectively, the control end of the described relay-operated controller of hysteresis loop comparator output termination.
2. pressure inverting controller according to claim 1 is characterized in that:
Described hysteresis loop comparator comprises first, second integrated operational amplifier and the trigger that is made of the cross connection of two Sheffer stroke gate head and the tail, the in-phase input end of first, second integrated operational amplifier connects the upper and lower limit reference voltage value output terminal of described reference voltage circuit respectively, the inverting input of first, second integrated operational amplifier also connects described voltage amplifier output terminal, and the output terminal of first, second integrated operational amplifier connects an input end of two Sheffer stroke gates respectively.
3. pressure inverting controller according to claim 1 is characterized in that:
Described pressure transducer is the foil resistance strain pressure transducer.
4. pressure inverting controller according to claim 1 is characterized in that:
Described relay-operated controller is provided with the 2-10 road, described hysteresis loop comparator, the corresponding setting of reference voltage circuit with relay-operated controller, and the pressure signal input end of each hysteresis loop comparator is attempted by on the output terminal of described voltage amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95222644 CN2231413Y (en) | 1995-10-06 | 1995-10-06 | Pressure transmitting controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95222644 CN2231413Y (en) | 1995-10-06 | 1995-10-06 | Pressure transmitting controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2231413Y true CN2231413Y (en) | 1996-07-17 |
Family
ID=33869927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95222644 Expired - Fee Related CN2231413Y (en) | 1995-10-06 | 1995-10-06 | Pressure transmitting controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2231413Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325890C (en) * | 2005-06-14 | 2007-07-11 | 浙江中控技术有限公司 | Circuit of testing capacitance and capacitance type pressure transmitter |
| CN103726771A (en) * | 2013-12-24 | 2014-04-16 | 苏州承腾电子科技有限公司 | Security door |
| CN104615167A (en) * | 2014-11-28 | 2015-05-13 | 中国科学院长春光学精密机械与物理研究所 | Output protection circuit of active optical force actuator of telescope |
| CN113207100A (en) * | 2020-06-11 | 2021-08-03 | 江苏方天电力技术有限公司 | Ultra-low power consumption intelligent well lid monitoring device and method |
-
1995
- 1995-10-06 CN CN 95222644 patent/CN2231413Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325890C (en) * | 2005-06-14 | 2007-07-11 | 浙江中控技术有限公司 | Circuit of testing capacitance and capacitance type pressure transmitter |
| CN103726771A (en) * | 2013-12-24 | 2014-04-16 | 苏州承腾电子科技有限公司 | Security door |
| CN104615167A (en) * | 2014-11-28 | 2015-05-13 | 中国科学院长春光学精密机械与物理研究所 | Output protection circuit of active optical force actuator of telescope |
| CN113207100A (en) * | 2020-06-11 | 2021-08-03 | 江苏方天电力技术有限公司 | Ultra-low power consumption intelligent well lid monitoring device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |