CN201548852U - Interface signal matching device of level transmitter module - Google Patents
Interface signal matching device of level transmitter module Download PDFInfo
- Publication number
- CN201548852U CN201548852U CN2009200946840U CN200920094684U CN201548852U CN 201548852 U CN201548852 U CN 201548852U CN 2009200946840 U CN2009200946840 U CN 2009200946840U CN 200920094684 U CN200920094684 U CN 200920094684U CN 201548852 U CN201548852 U CN 201548852U
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- circuit
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- matching device
- level transmitter
- switching
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Abstract
The utility model relates to an interface signal matching device of a level transmitter module. The utility model is characterized in that the interface signal matching device comprises a power transfer circuit, a sampling-hold circuit, a threshold setting circuit, a signal comparative circuit and an on-off value output circuit. The power transfer circuit is connected with the threshold setting circuit, and the sampling-hold circuit is connected with an inlet circuit of the signal comparative circuit. The signal comparative circuit receives two paths of input signals, which comprise voltage threshold of upper and lower limitations output by the threshold setting circuit and flow switch signals of 1 to 10V acquired by the sampling-hold circuit from a unilateral limitation level transmitter. The signal comparative circuit compares the two paths of input signals, and correspondingly outputs two paths of logic signals into the on-off value output circuit, and the on-off value output circuit correspondingly outputs control parameters of 0 or 24V into a control unit according to logical relations. The interface signal matching device of the level transmitter module can accurately control level height, avoid complex modification of programs, and increase safety of level control.
Description
Technical field
The utility model relates to a kind of fluid level transmitter module interface signal matching device, belongs to the technical field of liquid level control.
Background technology
Germany IFM LK3022 fluid level transmitter module has been widely used in liquid level control field, and it can provide the switching signal with two limit level monitoring functions, thereby guarantees the accuracy and the security of liquid level control.But because LK3022 stops production, substitute can only provide the switching signal with single limit level monitoring function, directly use on the one hand and need carry out complicated modification of program, can't control liquid level exactly on the other hand, and very easily cause the water tank appearance of control module dry, have very big potential safety hazard.
Summary of the invention
The purpose of this utility model is to provide a kind of fluid level transmitter module interface signal matching device, liquid level control signal by the output of monitoring substitute, handle through logical circuit, the satisfactory switching signals of final generation with two limit level monitoring functions, can control liquid level exactly, and avoided complicated modification of program, improved the security of liquid level control.
The technical solution of the utility model is achieved in that a kind of fluid level transmitter module interface signal matching device, it is characterized in that: by power-switching circuit, sampling hold circuit, threshold value circuit, signal comparator circuit, switching value output circuit are set and form; Power-switching circuit is provided with circuit with threshold value and is connected, and sampling hold circuit is connected with the inlet circuit of signal comparator circuit; Signal comparator circuit is accepted the transmission of two paths of signals: the one tunnel is the bound voltage threshold that threshold value is provided with circuit output, and the flow switching signal of the 1-10V that sampling hold circuit collects from single limit fluid level transmitter is accepted on another road; Signal comparator circuit is this two-way input signal relatively, and corresponding output two-way logical signal is in the switching value output circuit, and the switching value output circuit is according to logical relation, and the controlled variable of corresponding output 0 or 24V is in control module.
The chip that described power-switching circuit adopts is L7805CV, and it is the 5V power supply with the 24V power source conversion, provides power supply for threshold value is provided with circuit.
Described threshold value is provided with circuit to be made up of two change resistances of sliding, and the threshold value of 0-5V is provided for signal comparator circuit.
Good effect of the present utility model is the processing by this kind novel liquid level transmitter module interface signal coalignment, the novel sensor compatibility liquid level test function of various retrospective installations, not only can control liquid level exactly, and avoided complicated modification of program, improved the security of liquid level control.
Description of drawings
Fig. 1 is this fluid level transmitter module interface signal matching device internal signal transmission block diagram;
Fig. 2 is the circuit theory diagrams of fluid level transmitter module interface signal matching device of the present utility model;
Fig. 3 is the fundamental diagram of fluid level transmitter module interface signal matching device;
Embodiment
Below in conjunction with accompanying drawing the utility model is further described: as shown in Figure 1, a kind of fluid level transmitter module interface signal matching device is characterized in that: by power-switching circuit, sampling hold circuit, threshold value circuit, signal comparator circuit, switching value output circuit are set and form; Power-switching circuit is provided with circuit with threshold value and is connected, and sampling hold circuit is connected with the inlet circuit of signal comparator circuit; Signal comparator circuit is accepted the transmission of two paths of signals: the one tunnel is the bound voltage threshold that threshold value is provided with circuit output, and the flow switching signal of the 1-10V that sampling hold circuit collects from single limit fluid level transmitter is accepted on another road; Signal comparator circuit is this two-way input signal relatively, and corresponding output two-way logical signal is in the switching value output circuit, and the switching value output circuit is according to logical relation, and the controlled variable of corresponding output 0 or 24V is in control module.
The chip that described power-switching circuit adopts is L7805CV, and it is the 5V power supply with the 24V power source conversion, provides power supply for threshold value is provided with circuit.
Described threshold value is provided with circuit to be made up of two change resistances of sliding, and the threshold value of 0-5V is provided for signal comparator circuit.
Control module is accepted the controlled variable of coalignment output, and high water tank is carried out corresponding closed-loop control.Move in circles, finally realized accurate control and monitoring liquid level.
As Fig. 2, a kind of power-switching circuit acp chip of fluid level transmitter module interface signal matching device is L7805CV, and it is the 5V power supply with the 24V power source conversion, provides power supply for threshold value is provided with circuit.Threshold value is provided with circuit to be made up of two change resistances of sliding, and the threshold value of 0-5V can be provided for signal comparator circuit as required.Sampling hold circuit is gathered the control signal that the fluid level transmitter module is exported with higher sample frequency, is sent to the input end of signal comparator circuit.When the application of sampling hold circuit had guaranteed liquid level near limit value, the switching value of device output can not occur bigger shake with the fluctuation of liquid level.Signal comparator circuit comparator input signal and threshold value, output 0 or the comparison signal of 24V, the two-way comparison signal is through thinking and, needed switching signals with two limit level monitoring functions of the system that finally produces with gate output circuit of being made of diode.
As shown in Figure 3, single limit fluid level transmitter becomes the liquid level control signal of 0-10V with the liquid level conversion of signals, and the liquid level control signal is sent to the interface signal coalignment.According to practical experience for many years, when the liquid level control signal between 0.7V-3.5V, just can guarantee that the water level in the water tank is in the operation height of a safety.So when the water level in the water tank was low, the interface signal coalignment provided low level level switch signal for control module, opened small pump, was cistern water supply.When liquid level was in the safe operation height, device output high level switching signal was closed small pump.When liquid level surpasses last prescribing a time limit, open suction pump, outwards draining.Practice shows: use this kind fluid level transmitter module interface signal matching device, both guaranteed the accuracy of liquid level control, improved the security of liquid level control again, and during whole installation cost is lower and portable uses to the Signal Matching of transmitters such as temperature, pressure, therefore has certain popularization value.
Claims (3)
1. fluid level transmitter module interface signal matching device is characterized in that: by power-switching circuit, sampling hold circuit, threshold value circuit, signal comparator circuit, switching value output circuit are set and form; Power-switching circuit is provided with circuit with threshold value and is connected, and sampling hold circuit is connected with the inlet circuit of signal comparator circuit; Signal comparator circuit is accepted the transmission of two paths of signals: the one tunnel is the bound voltage threshold that threshold value is provided with circuit output, and the flow switching signal of the 1-10V that sampling hold circuit collects from single limit fluid level transmitter is accepted on another road; Signal comparator circuit is this two-way input signal relatively, and corresponding output two-way logical signal is in the switching value output circuit, and the switching value output circuit is according to logical relation, and the controlled variable of corresponding output 0 or 24V is in control module.
2. a kind of fluid level transmitter module interface signal matching device according to claim 1 is characterized in that the chip that described power-switching circuit adopts is L7805CV, and it is the 5V power supply with the 24V power source conversion, provides power supply for threshold value is provided with circuit.
3. a kind of fluid level transmitter module interface signal matching device according to claim 1 is characterized in that described threshold value is provided with circuit and is made up of two change resistances of sliding, and the threshold value of 0-5V is provided for signal comparator circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200946840U CN201548852U (en) | 2009-11-11 | 2009-11-11 | Interface signal matching device of level transmitter module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200946840U CN201548852U (en) | 2009-11-11 | 2009-11-11 | Interface signal matching device of level transmitter module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201548852U true CN201548852U (en) | 2010-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200946840U Expired - Lifetime CN201548852U (en) | 2009-11-11 | 2009-11-11 | Interface signal matching device of level transmitter module |
Country Status (1)
| Country | Link |
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| CN (1) | CN201548852U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108981848A (en) * | 2018-08-28 | 2018-12-11 | 山东中车华腾环保科技有限公司 | Level display device and its application with analog-digital conversion function |
| CN110031094A (en) * | 2019-04-24 | 2019-07-19 | 中国科学院上海微系统与信息技术研究所 | Improve the system and method for the number of photons resolution capabilities of single-photon detector |
-
2009
- 2009-11-11 CN CN2009200946840U patent/CN201548852U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108981848A (en) * | 2018-08-28 | 2018-12-11 | 山东中车华腾环保科技有限公司 | Level display device and its application with analog-digital conversion function |
| CN110031094A (en) * | 2019-04-24 | 2019-07-19 | 中国科学院上海微系统与信息技术研究所 | Improve the system and method for the number of photons resolution capabilities of single-photon detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100811 |