CN2085521U - Portable pressure signal generator - Google Patents
Portable pressure signal generator Download PDFInfo
- Publication number
- CN2085521U CN2085521U CN 90224619 CN90224619U CN2085521U CN 2085521 U CN2085521 U CN 2085521U CN 90224619 CN90224619 CN 90224619 CN 90224619 U CN90224619 U CN 90224619U CN 2085521 U CN2085521 U CN 2085521U
- Authority
- CN
- China
- Prior art keywords
- circuit
- signal generator
- pressure
- air chamber
- pressure signal
- 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.)
- Withdrawn
Links
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to a portable pressure signal generator, particularly a digital display pressure tester in an electronic instrument field. The portable pressure signal generator is composed of a power switch, a zero potentiometer, a current testing jack, a manual pressure tester, an output tee joint, an input tee joint, a voltage display, a current display, and a low voltage display of a line power supply. The portable pressure signal generator which has the functions of the power supply and an air source can test a pressure transmitter under the conditions of no power supply and no air source. The utility model is especially suitable for the maintenance of a stopped inflammable explosive chemical plant device and the online test of a pressure transmitter and is also capable of being used as a signal source during the online correction of an automatic control system. The utility model has the advantages of small size, light weight and high precision and is an ideal indispensable tool in the work of testing pressure transmitters by instrumentalists.
Description
The utility model relates to the digital display type pressure checking instrument in the electronic device field, is particularly useful for the pressure unit on-line testing, a kind of signal source in the time of also can joining the school as robot control system(RCS).
At present, various signal generators are of a great variety.The mechanical type hydraulic tester is unsuitable for the verification field instrument because volume is big, too heavy.As the digital display type pressure testers, when work, need external power source, (being generally 220 ∨, 50HZ AC power) be not because itself possesses pressure generation function, so can not use in the occasion of no source of the gas.The recent jaw type pressure signal generator that occurs, its source of the gas generator is a clamp type structure.When pressurization, the gas by generator is added to the output threeway, the tested table of a termination of threeway, and another termination pressure display table, 0.35 grade on this common tensimeter, fine setting is to realize by the volume that increases or reduce air chamber.This pressure signal generator, though improved ease of use, because the fine setting air chamber of generator is less, amount trimmed is very little, and simultaneously, this signal generator volume is big, outward appearance is coarse, does not have electric current (or voltage) measuring ability again, brings very big inconvenience for the field maintemance user of service.
Purpose of the present invention is to solve the problem that existing pressure testers exists, and produces a kind of portable pressure signal generator, integrates demonstration, power supply, source of the gas.Can be under the occasion of non-transformer, source of the gas, the verification pressure unit, when being particularly useful for inflammable and explosive chemical plant installations parking maintenance, utilize the manual pressure device in the pressure testers, for tested transmitter provides source of the gas, and on display, demonstrate the size of institute plus-pressure value size and tested transmitter output current.Simultaneously, in circuit, adopt the automatic testing circuit of battery low-voltage, guarantee the precision of this instrument.In circuit, adopt non-linear compensation circuit, guarantee the accuracy of detection of gamut.This instrument volume is little, in light weight, precision is high, is the ideal tools that the instrumentalist must be many.
Portable pressure signal generator of the present invention, it comprises power switch (5), zero potentiometer (4), current detecting jack (6), it is characterized in that manual pressure device (12) is by output threeway (8), the tested transmitter of one termination (13), the current value of corresponding output is gone up at display (1) and is shown, another termination input threeway (7), on display (2), demonstrate institute's plus-pressure value, also comprise automatic testing circuit of circuit supply battery low-voltage and non-linear auto compensatng circuit at circuit part.
Manually pressure device (12) is to go up at inflating bat-handle (10) to connect connecting rod (14), piston (15) is housed on connecting rod to be inserted in the air chamber (16A), stud with ball (17) in the piston hole in the air chamber (16A), move on the ball when inflating, gas enters air chamber, when handle is pulled back, ball withstands aperture, closes gas, at the other end of air chamber (16A), a vernier adjustment knob (11) is housed, the connecting rod of vernier adjustment knob (18) is threaded with air chamber (16B), by moving up and down of fine setting, makes the volume of air chamber increase or reduce, pressure changes, at the air chamber middle part venting button (9) is housed, its structure is that hand is by the bounce-back formula, when venting, press venting button (9), after openhanded the opening, auto-closing, the vertical direction of the venting button (9) in the middle part of air chamber is equipped with output threeway (8), the tested transmitter of one termination (13), another termination input threeway (7).
The circuit of pressure signal generator is to be that undervoltage detection circuit, non-linear auto compensatng circuit, several parts of linear amplification constitute by constant current source, the automatic testing circuit of circuit supply battery low-voltage.
The automatic testing circuit of circuit supply battery low-voltage is a undervoltage detection circuit, and it is by resistance R 25, R26, R27, potentiometer W6, and voltage comparator A3 and voltage-reference integrated package D2 and triode T3 and light emitting diode D3 constitute.
The voltage rating unit of circuit is by resistance R 26, potentiometer W6, and voltage comparator A3 constitutes.
The display part is by resistance R 27, and triode T3 and light emitting diode D3 constitute.
Non-linear auto compensatng circuit, this circuit is by operational amplifier A 2 triode T2, resistance R 9, R10, R11, R8 and potentiometer W4, W5, D1, formation.
Constant current source is made up of A1, T1, R3, R4, RBG.
Technical solution of the present invention can further also describe with following accompanying drawing in conjunction with the embodiments.
Fig. 1 is pressure signal generator of the present invention and tested table verification connection diagram.
Fig. 2 is the partial sectional view of manual pressure device.
Fig. 3 is the circuit diagram of pressure signal generator.
Concrete job step is the output threeway (8) with manual pressure device (12), one termination input threeway (7), the tested transmitter of another termination (13), the output terminal of tested transmitter is received on the current detecting jack (6), turn on the power switch (5), adjust zero point, then with manual pressure device pressurization, up to satisfying required pressure, on display (2), demonstrate institute's plus-pressure value, on display (1), demonstrate the output current value of tested transmitter, if any pressure divergence, adjust vernier adjustment knob (11), when the needs impressed pressure returns zero, with the emptying of venting button (9).When the under-voltage display of line power (3) when pilot lamp is bright, prompting needs to change the supplying cell of circuit part.
The automatic testing circuit of circuit supply battery low-voltage is that the course of work of undervoltage detection circuit is, '+' of voltage comparator connects reference voltage source, '-' end of voltage comparator is the test side, when circuit voltage just often, test side voltage is higher than reference voltage terminal, comparer output electronegative potential, triode ends, light emitting diode does not work because of electric current is very for a short time, and when circuit voltage was lower than setting value, test side voltage was lower than reference voltage terminal, comparer output noble potential, the triode conducting, LED light lamp is bright, and prompting this moment needs to change supplying cell.
The course of work of non-linear auto compensatng circuit is, when impressed pressure, sensor output correspondent voltage value is after A1 amplifies, by 7, the 8 pin output of A1, this signal one tunnel is added to 41/2 LCD A2 and shows, another road is added to 10,12 ends of A2, and the electric current of A2 output is added on R10, R11 and the W4, and at this moment the adjustable point at W4 is identical with the recruitment of the mid point of R10, R11, feed back to input end and equate, then the input of 13 pin of A1 is constant.When if '+' deviation appears in force value that pressure display unit (2) upward shows and impressed pressure value, then add 5% pressure, then regulate W4, the 13 pin input signals of A1 are reduced, the supply current that causes sensor increases, and output voltage increases, and the pressure displayed value increases, at 100% spot pressure adjusted W3, force value is transferred to standard point then.During as appearance '-' deviation, then W4 is regulated in the other direction.
The course of work of constant current source is, when for a certain reason, when the IC1 electric current was increased, the RBG both end voltage increased, and B point current potential descends, and the 14 pin current potentials of A1 are descended, and this moment, the base potential of T1 descended, and then the IC1 electric current descends, and it is firmly permanent to be about to the electric current that changes.
Portable pressure signal generator of the present invention integrates demonstration, power supply, source of the gas.Can be under the occasion of non-transformer, source of the gas, the verification pressure unit, when being particularly useful for inflammable and explosive chemical plant installations parking maintenance, utilize the manual pressure device in the pressure testers, for tested transmitter provides source of the gas, and on display, demonstrate the size of institute plus-pressure value size and tested transmitter output current.Simultaneously, in circuit, adopt the automatic testing circuit of battery low-voltage, guarantee the precision of this instrument.In circuit, adopt non-linear compensation circuit, guarantee the accuracy of detection of gamut.This instrument volume is little, in light weight, precision is high, is the ideal tools that the instrumentalist must be many.
Claims (4)
1, a kind of portable pressure signal generator, it comprises power switch (5), zero potentiometer (4), current detecting jack (6) is characterized in that manual pressure device (12) is by output threeway (8), the tested transmitter of a termination (13), the current value of corresponding output is gone up at display (1) and is shown, another termination input threeway (7) demonstrates institute's plus-pressure value on display (2), also comprise automatic testing circuit of circuit supply battery low-voltage and non-linear auto compensatng circuit at circuit part.
2, pressure signal generator according to claim 1, it is characterized in that manual pressure device (12) is to go up at inflating bat-handle (10) to connect connecting rod (14), piston (15) is housed on connecting rod to be inserted in the air chamber (16A), stud with ball (17) in the piston hole in the air chamber (16A), the other end at air chamber (16A), the connecting rod (18) that a vernier adjustment knob (11) vernier adjustment knob is housed is threaded with air chamber (16B), at the air chamber middle part venting button (9) is housed, its structure be hand by the bounce-back formula, in the vertical direction of the venting knob (9) at air chamber middle part output threeway (8) is housed.
3, pressure signal generator according to claim 1, it is characterized in that the automatic testing circuit of circuit supply battery low-voltage is a undervoltage detection circuit, it is by resistance R 25, R26, R27, potentiometer W6, voltage comparator A3 and voltage-reference integrated package D2 and triode T3 and light emitting diode D3 constitute.
4, pressure signal generator according to claim 1, its feature be at non-linear auto compensatng circuit, and this circuit is by operational amplifier A 2, triode T2, resistance R 9, R10, R11, R8 and potentiometer W4, W5, D1, formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90224619 CN2085521U (en) | 1990-12-13 | 1990-12-13 | Portable pressure signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90224619 CN2085521U (en) | 1990-12-13 | 1990-12-13 | Portable pressure signal generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2085521U true CN2085521U (en) | 1991-09-25 |
Family
ID=4902169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90224619 Withdrawn CN2085521U (en) | 1990-12-13 | 1990-12-13 | Portable pressure signal generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2085521U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107928641A (en) * | 2017-12-12 | 2018-04-20 | 吉林大学 | Pulse signal extraction element for pulse wave spectrum |
| CN107928638A (en) * | 2017-12-12 | 2018-04-20 | 吉林大学 | A kind of pulse signal extraction and transmission circuit |
| CN107928636A (en) * | 2017-12-12 | 2018-04-20 | 吉林大学 | A kind of pulse-taking instrument with temperature compensation function |
| CN111256907A (en) * | 2020-01-03 | 2020-06-09 | 武汉钢铁有限公司 | Intelligent line inspection checking device of transmitter |
-
1990
- 1990-12-13 CN CN 90224619 patent/CN2085521U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107928641A (en) * | 2017-12-12 | 2018-04-20 | 吉林大学 | Pulse signal extraction element for pulse wave spectrum |
| CN107928638A (en) * | 2017-12-12 | 2018-04-20 | 吉林大学 | A kind of pulse signal extraction and transmission circuit |
| CN107928636A (en) * | 2017-12-12 | 2018-04-20 | 吉林大学 | A kind of pulse-taking instrument with temperature compensation function |
| CN111256907A (en) * | 2020-01-03 | 2020-06-09 | 武汉钢铁有限公司 | Intelligent line inspection checking device of transmitter |
| CN111256907B (en) * | 2020-01-03 | 2021-08-17 | 武汉钢铁有限公司 | Intelligent line inspection checking device of transmitter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101477150B (en) | Method for implementing fast measurement of inductive winding DC resistance by using constant voltage source | |
| CN207114635U (en) | Portable-type loop resistor test device | |
| CN201056209Y (en) | Vehicle mounted synthetic alarm circuit breaker | |
| CN203688108U (en) | Transformer temperature measurement system calibration meter | |
| CN2085521U (en) | Portable pressure signal generator | |
| CN206848388U (en) | A kind of straight-flow system exchange is scurried into and insulation detection device | |
| CN211014495U (en) | AC-DC integrated charging pile test platform | |
| CN201327522Y (en) | Polarity tester of electromagnetic type current transformer | |
| CN101144405A (en) | Thermometer for stepper motor drive finger | |
| DE2659363A1 (en) | TEST DEVICE FOR ELECTRIC CIRCUITS | |
| CN210863881U (en) | Improved generation segmentation return circuit resistance tester | |
| CN2304130Y (en) | D. C. resistance detecting instrument | |
| CN211347216U (en) | Alarm device for quick test of control end of electric contact pressure gauge | |
| CN201203593Y (en) | Instrument for measuring combustible gas concentration | |
| CN2214010Y (en) | Gear-shifting protection type voltage-stabilized power supply | |
| CN2458610Y (en) | Portable medical intelligent vacuum-meter check meter | |
| CN202631640U (en) | Pocket digital milliohmmeter | |
| CN2146003Y (en) | Self-stabilizing D.C-D.C conversion milli-ohmmeter and million-ohmmeter | |
| CN2032714U (en) | Digital electric transferring device checker | |
| CN201083554Y (en) | Stepping motor driven thermometer | |
| CN215728466U (en) | Circuit for measuring output value and resistance value of sensor with high precision | |
| CN2394221Y (en) | Portable intellectual and multifunctional methane detecting alarm instrument | |
| CN2248338Y (en) | Digital multifunctional tester | |
| CN102621392A (en) | Pocket-size digital milliohmmeter | |
| CN2186394Y (en) | High-precision checking table |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |