CN201562965U - Electrical supply equipment for process transmitter loop - Google Patents
Electrical supply equipment for process transmitter loop Download PDFInfo
- Publication number
- CN201562965U CN201562965U CN2009200978470U CN200920097847U CN201562965U CN 201562965 U CN201562965 U CN 201562965U CN 2009200978470 U CN2009200978470 U CN 2009200978470U CN 200920097847 U CN200920097847 U CN 200920097847U CN 201562965 U CN201562965 U CN 201562965U
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- loop
- process transmitter
- power supply
- control system
- controller
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Abstract
The utility model belongs to the field of electrical supply equipment, which relates to an electrical supply equipment for a process transmitter loop. The utility model provides an electrical supply equipment of a process transmitter loop, which includes a two-wire system loop, a process transmitter, a control system and a power supply for the control system, wherein the control system includes a controller and a memory. The utility model has the advantages that one loop can at least measure two variable quantities, and the utility mode is simple and convenient with strong operability.
Description
Technical field
The utility model belongs to the power supply unit field, relates to a kind of process transmitter loop power supply equipment.
Background technology
Process transmitter is widely used in the detection and the measurement of process variables, and can realize remote transfer of data.At present, general method is that process variables is transmitted by the loop with the form of current value, represents that generally the current value of process variables is redefined for 4mA～20mA.There is very strong anti-interference in this loop, has obtained the extensive approval of industrial quarters.The required power supply of transmitter self is provided by loop current, and it must be generally 4mA when current value is minimum, still can operate as normal.
A key character of existing loop power supply equipment is that every equipment must have an independently power supply.Reason one does not have effective method to distinguish the output of a plurality of equipment in the loop at present; Reason two is limited to 20mA on the loop current, a plurality of equipment in the loop can surpass this restriction very soon, can't realize realizing communication by Current Regulation.That is to say under the situation that does not have other power supply, HART agreement or other digital communication agreement, a loop power supply equipment to be arranged in each loop, can't carry out measurement of a plurality of equipment or multivariable and transmission convenient, effectively.
Summary of the invention
The purpose of this utility model provides a kind of two-wire system process transmitter loop power supply equipment, can be in traditional loop power supply circuit, and in the absence of other power supply, HART agreement or other digital communication agreement, realize carrying out communication with two equipment or a mutiread taking equipment at least, thereby realize the measurement of at least two process variables.
The purpose of this utility model is achieved by following scheme.Process transmitter loop power supply equipment comprises the two-wire system loop, process transmitter, and control system and the power supply of powering to control system, wherein control system comprises controller and memory.
Described process transmitter is used for the numerical value of measured process variable, for semi-intelligent type process transmitter able to programme or configurable, as the circuit that contains timer or timer with, perhaps has counter.Described process variables can be a process condition, as temperature, pressure, pH value, flow, liquid level, or the state of process control equipment, as set point of valve etc.
Whether the effect of described controller is to control in Preset Time transducer to be powered; Simultaneously, controller has reception again, reads the function of process transmitter information.Controller comprises a timing circuit, periodically gives loop power supply.This timing circuit can be the processor of tape timer, or the PLC of a tape timer, or other can be within a preset time interval selectively to the process transmitter power supply or read the device of process transmitter information, can long-rangely send wireless signal sends instruction to controller timer as one by modulator-demodulator or antenna.Controller also comprise one can detect with reading loop in the receiver that changes of electric current, and the storage that will detect and read is in the memory of control system, in order to after read and teletransmission to certain position or directly demonstration.
Described control system can remain electriferous state in the ordinary course of things, but in wireless application, control system can often be in sleep state, the loop is not monitored, and to the transducer power supply, does not reduce power consumption as much as possible.Afterwards, control system can be periodically by timer or the external definition circuit " wakes " measurement of carrying out process variables up.
Described power supply is a DC power supply.
In actual detected, controller receives instruction, and energized is periodically given loop power supply, promptly begins to power to process transmitter.The numerical value of process transmitter measured process variable, because it is able to programme or configurable, can in the time of setting, carry out the measurement and the transmission of various process variable respectively, or detect plural variable simultaneously, in the time of setting, respectively numerical value be transmitted.Receiver detection in the controller or the electric current situation of change in the reading loop save the data in to prepare against in the memory and read or teletransmission afterwards, or directly be presented on the instrument.
Usefulness of the present utility model is, utilizes a loop to measure two variablees at least, and is simple, convenient, workable.
Description of drawings
Fig. 1 is this device structure schematic diagram that contains a process transmitter;
Fig. 2 is this device structure schematic diagram that contains two process transmitters;
Wherein 1,1 ' is process transmitter, and 2 is the two-wire system loop, and 3 is control system, and 4 is controller, and 5 is memory, and 6 is power supply, and 7,8 is different liquid levels.
Specific implementation method
Detailed in conjunction with the accompanying drawings and specific embodiment illustrates the utility model.
Embodiment one: as shown in Figure 1, process transmitter 1 is a liquid level gauge, can measure two process variables liquid levels 7 and liquid level 8 at least, and has a circuit that contains timer.Controller 4 is connected DC power supply 6 after receiving instruction, power up for two-wire system loop 2 according to the time cycle property ground of setting, and powers up promptly for process transmitter 1.Powering up the back certain hour, after process transmitter is stable, testing process variable and transmit data continuously just.The specific implementation method is as follows, and at first process transmitter can detect first process variables liquid level 7 and transmit data, and after through the time interval of setting, transducer can detect second process variables liquid level 8 and transmit data.After electric current in receiver detection and the reading loop changes, data directly are presented on the chart recorder.
Embodiment two: as shown in Figure 1, process transmitter 1 is two liquid level gauges, and has a circuit that contains timer.Controller 4 is connected DC power supply 6 after receiving instruction, power up for two-wire system loop 2 according to the time cycle property ground of setting, and powers up promptly for process transmitter 1.Powering up the back certain hour, after process transmitter was stable, process transmitter 1 can almost detect two process variables liquid levels 7 and 8 simultaneously.This pair liquid level gauge transmits one of them liquid level 7 by the variation of loop current, after through the default time interval, transmits another one liquid level 8 by the variation of loop current once more.Then, the power supply of controller meeting cut-off loop.After receiver detection in the controller and the electric current in the reading loop change, data directly are presented on the chart recorder respectively.
Embodiment three: as shown in Figure 2, in another mode, two process transmitter liquid level gauges 1 and 1 ' are arranged at least simultaneously in the loop, each liquid level gauge all contains timer.When controller 4 is accepted instruction, connect DC power supply 6, after powering up to circuit.Wherein liquid level gauge 1 can be in state of activation, begins to carry out the measurement and the transmission of process variables liquid level 7, another one liquid level gauge 1 ' be in stop or unactivated state to reduce power consumption.After through the default time interval, the liquid level gauge 1 of state of activation becomes unactivated state, and the liquid level gauge 1 ' of unactivated state is activated, and the measurement and the transmission of beginning process variables liquid level 8, and the timer in each liquid level gauge will be controlled the operating time of liquid level gauge.The result that receiver in the controller will detect is stored in the memory 5.
Embodiment four: in another mode, two process transmitters are arranged in the loop, and each process transmitter all has a counter.After controller acceptance instruction powered up to the loop, all process transmitters all were in unactivated state, but counting is but increasing.According to the numerical value of counter, when counting was even number, first process transmitter was activated; Second process transmitter still is unactivated state.When counting was odd number, first process transmitter quit work, and is in unactivated state, and second process transmitter is activated.
Claims (7)
1. process transmitter loop power supply equipment, it is characterized in that, comprise: the two-wire system loop, process transmitter, control system, to the power supply of control system power supply, process transmitter is connected with control system by the two-wire system loop, power supply is connected with control system by lead, and wherein control system comprises controller and memory.
2. equipment according to claim 1 is characterized in that, process transmitter is a semi-intelligent type process transmitter able to programme or configurable.
3. equipment according to claim 1 is characterized in that controller comprises a timing circuit and a receiver.
4. equipment according to claim 3 is characterized in that timing circuit can be the processor of tape timer, or the PLC of a tape timer.
5. equipment according to claim 3 is characterized in that timing circuit is long-rangely to send wireless signal sends instruction to controller timer by modulator-demodulator or antenna.
6. equipment according to claim 1 is characterized in that control system can be electriferous state or sleep state.
7. equipment according to claim 1 is characterized in that power supply is a battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200978470U CN201562965U (en) | 2009-07-22 | 2009-07-22 | Electrical supply equipment for process transmitter loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200978470U CN201562965U (en) | 2009-07-22 | 2009-07-22 | Electrical supply equipment for process transmitter loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201562965U true CN201562965U (en) | 2010-08-25 |
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ID=42628114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200978470U Expired - Lifetime CN201562965U (en) | 2009-07-22 | 2009-07-22 | Electrical supply equipment for process transmitter loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201562965U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104969042A (en) * | 2012-12-05 | 2015-10-07 | 恩德莱斯和豪瑟尔两合公司 | Radar-based filling level measuring device with a synthesizer circuit |
-
2009
- 2009-07-22 CN CN2009200978470U patent/CN201562965U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104969042A (en) * | 2012-12-05 | 2015-10-07 | 恩德莱斯和豪瑟尔两合公司 | Radar-based filling level measuring device with a synthesizer circuit |
| CN104969042B (en) * | 2012-12-05 | 2018-05-25 | 恩德莱斯和豪瑟尔两合公司 | The liquid level emasuring device based on radar with condensating synthesizering circuit |
| US10018495B2 (en) | 2012-12-05 | 2018-07-10 | Endress + Hauser Gmbh + Co. Kg | Radar-based fill-level measuring device having a synthesizer circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: K-Tek (Tianjin) Level Co., Ltd. Document name: Review of business letter |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Wang Xuemei Document name: Notification to Go Through Formalities of Registration |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100825 |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: K-Tek (Tianjin) Level Co., Ltd. Document name: Notification of Expiration of Patent Right Duration |