Debugging protection type transmitter

Abstract

The utility model belongs to the technical field of transmitters, and mainly provides an adjustable protective transmitter, which comprises a signal input module, a signal output module, a signal processing module and a signal calibration module, and is characterized in that the signal input module comprises at least one input channel used for connecting an external sensor and receiving an electric signal input by the sensor; the signal output module comprises at least one output channel which is arranged in one-to-one correspondence with the signal input modules and used for outputting the electric signals received by the signal input modules, and the signal output module transmits the multiple received electric signals to the controller in a voltage or current mode. The real-time change of a plurality of measured physical quantities can be observed conveniently, and adjustment can be carried out in time.

Description

Technical Field

[0001] The present invention relates to the field of transmitter technology, and in particular to an adjustable protective transmitter. Background Art

[0002] Industry generally requires measuring various electrical and non-electrical quantities, such as current, voltage, power, frequency, temperature, weight, position, pressure, speed, and angle. These quantities must be converted into receivable DC analog signals before being transmitted to a control room or display device hundreds of meters away. A device that converts the measured quantity into a transmittable DC signal is called a transmitter.

[0003] In other words, a transmitter is a converter that converts the output signal of a sensor into a signal that can be recognized by a controller (or converts the non-electrical quantity input by the sensor into an electrical signal and amplifies it for remote measurement and control). Together, the sensor and transmitter constitute the monitoring signal source for automatic control. Different physical quantities require different sensors and corresponding transmitters. There are many types of transmitters, and the transmitters used in industrial control instruments mainly include temperature transmitters, pressure transmitters, flow transmitters, current transmitters, voltage transmitters, and so on. However, in complex industrial sites, it is often necessary to monitor multiple physical quantities, which requires more sensors and transmitters. Not only is installation time-consuming and labor-intensive, but when a failure occurs, workers have to constantly travel back and forth between various devices, increasing maintenance costs and time.

[0004] In addition, the transmitter can output voltage signals or current signals, but conventional transmitters can only output one of the signals and cannot choose between voltage and current, which cannot meet the complex industrial site conditions. This is because the current output transmitter has strong anti-interference ability and long transmission distance, while the voltage output transmitter has a short transmission distance, simple output signals, easy to understand, and low price. Users cannot switch freely when faced with complex and changing situations.

[0005] Secondly, traditional transmitters generally only have one range for outputting DC signals, such as 0-5V or 0-10V output voltage, or 0-20mA or 4-20mA output current. They cannot switch between multiple ranges, so if users need transmitters with multiple ranges, they have to purchase multiple transmitters. Therefore, facing the complex and ever-changing industrial scene, there is an urgent need to provide users with a transmitter with multiple ranges, multiple output modes, and the ability to work with multiple sensors simultaneously. Utility Model Content

[0006] In order to solve the technical problems in the above-mentioned prior art that the transmitter cannot be used with multiple sensors, cannot freely switch between multiple ranges, and cannot output signals in multiple ways, the main purpose of this application is to provide a debuggable protective transmitter.

[0007] To achieve the above-mentioned invention objectives, this application adopts the following technical solutions:

[0008] An embodiment of the present application provides a debuggable protective transmitter, comprising a signal input module, a signal output module, a signal processing module, and a signal calibration module, wherein:

[0009] A signal input module, comprising at least one input channel for connecting to an external sensor and receiving an electrical signal input by the sensor;

[0010] a signal output module, the signal output module comprising at least one output terminal, provided in one-to-one correspondence with the signal input module, and configured to output the electrical signal received by the signal input module;

[0011] a signal processing module, the signal processing module being located between the signal input module and the signal calibration module, and / or the signal processing module being located between the signal calibration module and the signal output module;

[0012] a signal calibration module, the signal calibration module being located between the signal processing modules;

[0013] The sensor converts the collected measured physical quantities into electrical signals and outputs them to the signal input module in the form of voltage or current. The multiple input channels in the signal input module respectively output the received electrical signals to the signal processing module. The signal processing module preprocesses the received electrical signals to form stable and standardized electrical signals, and transmits the electrical signals to the multiple output ends of the signal output module respectively. The signal output module transmits the multiple received electrical signals to the controller in the form of voltage or current, which facilitates the observation of real-time changes in multiple measured physical quantities and enables timely adjustments.

[0014] According to an embodiment of the present application, the signal input module includes input channel 1, input channel 2, input channel 3, and input channel 4, and the input channels 1 to 4 are independently connected to or not connected to the input channel 1 to 4 resistor devices.

[0015] According to an embodiment of the present application, the input channels 1, 2, 3, and 4 are connected to resistive devices, respectively. The resistive devices have different resistance values and are connected to the input channels 1 to 4 independently and without affecting each other, according to the following formula:

[0016] Vox=A×Vix Aox=f(Vox)(x=1,2,3,4)

[0017] in:

[0018] Vix is the input signal of the xth input channel

[0019] Vox, Aox are the output voltage and current signals corresponding to the x input channel

[0020] The signal output by the signal output module can be adjusted.

[0021] According to an embodiment of the present application, the signal output module includes output channel 1, output channel 2, output channel 3, and output channel 4, and the output channels 1 to 4 are respectively provided with a voltage output terminal x and a current output terminal x, where x=1, 2, 3, 4, and the voltage output terminal x and the current output terminal x are connected to the input channels 1 to 4 in a one-to-one correspondence.

[0022] According to an embodiment of the present application, the signal processing module includes:

[0023] a first-stage preamplifier circuit, the first-stage preamplifier circuit being arranged between the signal input module and the signal calibration module;

[0024] A voltage-current V / I conversion circuit, wherein the voltage-current V / I conversion circuit is provided between the signal output module and the signal calibration module;

[0025] A two-stage amplification and filtering circuit is provided between the signal calibration module and the voltage-current V / I conversion circuit.

[0026] According to an embodiment of the present application, the signal processing module is provided in the circuit formed by the input channels 1 to 4 and the voltage output terminal x and the current output terminal x.

[0027] According to an embodiment of the present application, the signal processing modules are all composed of a combination of integrated circuit devices, resistor devices, and capacitor devices.

[0028] According to an embodiment of the present application, the signal processing module adopts a three-wire wiring principle.

[0029] According to an embodiment of the present application, the signal calibration module includes a zero-point adjuster and a full-scale adjuster.

[0030] According to an embodiment of the present application, a power supply module is further included, which is composed of a power supply and a power line. The power supply uses an instrument power supply, and the power line uses a shielded cable.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] In this embodiment, the input module of the transmitter has multiple input channels, and the multiple input channels can be connected to multiple transmitters, that is, one transmitter can synchronously monitor multiple measured physical quantities; the output module of the transmitter has multiple output terminals, and can output electrical signals in multiple forms, such as voltage or current; when facing complex and changeable industrial sites, users can connect different sensors according to the site conditions to monitor different physical quantities, such as temperature, pressure, liquid level, etc., and can also output signals in different forms according to the site conditions, such as voltage or current, to meet the different needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] Figure 1 This is a schematic diagram of the PCB component layout and wiring definition of a debuggable protective transmitter provided in an embodiment of the utility model.

[0036] Figure 2 This is a schematic diagram of the definition and dimensions of the wiring terminals of an adjustable protective transmitter provided in an embodiment of the utility model.

[0037] Figure 3 This is a schematic diagram of the PCB structure and assembly of an adjustable protective transmitter provided in an embodiment of the present utility model.

[0038] Figure 4 This is a schematic diagram of the overall structure and dimensions of an adjustable protective transmitter provided in an embodiment of the present utility model.

[0039] Figure 5 This is a schematic diagram of the input terminal structure and signal definition of an adjustable protective transmitter provided in an embodiment of the present utility model.

[0040] Figure 6 This is a schematic diagram of the output terminal structure and signal definition of an adjustable protective transmitter provided in an embodiment of the utility model.

[0041] Figure 7This is a schematic diagram of the wiring principle of a signal processing module of an adjustable protective transmitter provided in an embodiment of the utility model.

[0042] Description of reference numerals:

[0043] 1. Signal input module; 11. Input channel 1; 12. Input channel 2; 13. Input channel 3; 14. Input channel 4;

[0044] 2. Signal output module; 21. Output channel 1; 22. Output channel 2; 23. Output channel 3; 24. Output channel 4; 211. Voltage output terminal 1; 212. Current output terminal 1; 221. Voltage output terminal 2; 222. Current output terminal 2; 231. Voltage output terminal 3; 232. Current output terminal 3; 241. Voltage output terminal 4; 242. Current output terminal 4;

[0045] 3. Signal processing module; 31. First-stage preamplifier circuit; 32. Second-stage amplifier and filter circuit; 33. Voltage-current V / I conversion circuit;

[0046] 4. Signal calibration module; 41. Zero point regulator; 42. Full scale regulator;

[0047] 5. Power module. DETAILED DESCRIPTION

[0048] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] To facilitate a more specific understanding of the technical concept of the present application, the following exemplary embodiments of the present application are described with reference to the accompanying drawings:

[0050] refer to Figures 1 to 4 The embodiment of the present application provides a debuggable protective transmitter, which mainly includes a signal input module 1, a signal output module 2, a signal processing module 3 and a signal calibration module 4, wherein:

[0051] The signal input module 1 includes at least one input channel for connecting to an external sensor and receiving the electrical signal input by the sensor. The sensor converts the measured physical quantity into an electrical signal and outputs it to the signal input module 1. Multiple input channels are set in the input module 1 in order to be able to connect with more sensors, that is, a transmitter can be connected to multiple sensors at the same time, such as pressure sensors, temperature sensors, liquid level sensors, etc. By setting multiple input channels in the input module 1 of the transmitter, the effect of simultaneously monitoring multiple physical variables can be achieved.

[0052] Preferably, the signal input module 1 includes input channel 1, input channel 2, input channel 3, and input channel 4. Figure 2 As can be seen from Table 1, the input channels 1 to 4 are connected to resistor devices independently and do not interfere with each other;

[0053] Table 1:

[0054]

[0055] The purpose is to be able to flexibly, freely and selectively match multiple sensors and different types of sensors in complex industrial sites according to different scenarios and different needs, so that users can monitor different physical quantities such as temperature, pressure, liquid level and other physical quantities.

[0056] according to Figure 1 and Figure 2 Preferably, the input channel 1, input channel 2, input channel 3, and input channel 4 are independently connected to resistance devices without interfering with each other, according to the following formula:

[0057] Vox=A×Vix Aox=f(Vox)(x=1,2,3,4)

[0058] in:

[0059] Vix is the input signal of the xth input channel

[0060] Vox, Aox are the output voltage and current signals corresponding to the x input channel

[0061] The output voltage Vox is directly proportional to the input signal Vix. When the input signal Vix is constant, the amplification factor A can be adjusted to achieve different outputs. The amplification factor A is accurately achieved by selecting different feedback resistors for initial adjustment and potentiometer Wsx for fine adjustment through a combination of a 4-position swing switch. The 4-position swing switch has 16 combinations. With this design, users can freely combine switches according to industrial site conditions to meet the needs of different ranges or different input signals. It can be used with sensors of different ranges to monitor a wider range of physical variables.

[0062] according to Figures 1 to 6 As can be seen from Table 2;

[0063] Table 2

[0064] 211 212 221 222 Voltage output terminal 1 Current output 1 Voltage output 2 Current output 2 231 232 241 242 Voltage output terminal 3 Current output terminal 3 Voltage output terminal 4 Current output terminal 4

[0065] Preferably, the signal output module 2 includes an output channel 121, an output channel 222, an output channel 323, and an output channel 424. The output channels 1 to 4 are respectively provided with a voltage output terminal x and a current output terminal x, where x=1, 2, 3, and 4, and the voltage output terminal x and the current output terminal x are connected to the input channels 1 to 4 in a one-to-one correspondence. It is not difficult to understand that the input module 1 is provided with multiple input channels, and correspondingly, the output module 2 is also provided with multiple output terminals, which has the following functions:

[0066] 1. To facilitate the output of electrical signals from different sensors to corresponding input terminals, so as to achieve real-time monitoring of different physical variables;

[0067] 2. Current output can transmit over long distances and has strong anti-interference ability. Voltage output signals are simple and have a relatively short transmission distance, which is easy for users to understand. Therefore, users can choose different output methods according to different scenarios.

[0068] according to Figure 1 and Figure 3 As can be seen from Table 3;

[0069] Table 3

[0070] U C R integrated circuit devices Capacitive devices Resistor devices

[0071] Preferably, the signal processing module 3 includes:

[0072] A first-stage preamplifier circuit 31, which is provided between the signal input module 1 and the signal calibration module 4;

[0073] A secondary amplifying and filtering circuit 32 , which is provided between the signal calibration module 4 and the linear voltage-current V / I conversion circuit 33 ;

[0074] The linear voltage-current V / I conversion circuit 33 is provided between the signal output module 2 and the signal calibration module 4; the function of the linear voltage-current V / I conversion circuit 33 is to convert the signal transmitted from the calibration module 4 into a voltage / current signal;

[0075] The first-stage preamplifier circuit 31, the second-stage amplifier filter circuit 32, and the voltage-current V / I conversion circuit 33 are all composed of integrated circuit devices, resistor devices, and capacitor devices.

[0076] The main functions are as follows:

[0077] 1. It can remove interference or clutter within a certain frequency range from the signal received by the input module 1, so that the output signal is cleaner, more stable and reliable. According to the actual situation of the industrial site, the user can select a specific frequency range as needed, pass the signal within the frequency range, and block the transmission of signals of other frequencies, thereby improving the performance and reliability of the equipment.

[0078] 2. It can amplify the signal received by the input module 1 and increase the amplitude of the electrical signal. Especially when the input signal in the circuit is too weak or the transmission distance between the signal source and the load is large, the signal will gradually attenuate. At this time, the signal processing module 4 can amplify the weak signal to ensure the accurate transmission of the signal.

[0079] according to Figure 1 、 Figure 3 and Figure 7 Preferably, the signal processing module 3 adopts a three-wire wiring principle, in which the third wire is equivalent to the 0 wire and is connected to the bottom line, which not only plays a protective role, but also eliminates the impact of temperature changes caused by the resistance device, thereby improving safety performance and reliability.

[0080] according to Figures 1 to 6 , preferably, the signal calibration module 4 includes a zero point regulator 41 and a full scale regulator 42, the purpose of which is to calibrate the accuracy of the output signal;

[0081] For newly installed systems, or after a period of use, or when replacing sensors, or when removing additional loads, zero adjustment should be performed. Adjust the zero adjuster 41 to make the output signal zero. Clockwise adjustment increases the data, and counterclockwise adjustment decreases the data. The zero adjustment range is full scale × 25%. Considering various possible situations, the actual adjustment range may be wider. Be careful and cautious when adjusting, and move slowly and steadily.

[0082] For a newly installed system, or after a period of use, or when replacing sensors, or when removing additional loads, the output full-scale adjustment should be performed. By adjusting the full-scale adjuster 42, the output signal is equal to the rated output signal. Clockwise adjustment increases the data, and vice versa.

[0083] according to Figures 1 to 3Preferably, the transmitter also includes a power supply module 5, which is composed of a power supply and a power cord. The power supply uses an instrument power supply, and the power cord uses a shielded cable. When the power is turned on, AC signals and signals of different frequencies will be generated in the circuit. The instrument power supply can filter out the AC signal well and allow the DC signal to pass through. The use of a shielded cable can well isolate the signal of a specific frequency and allow a stable signal to pass through, thereby improving the safety performance and stable output performance of the equipment.

[0084] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0085] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0086] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0087] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A debuggable protective transmitter, characterized in that: It includes a signal input module, a signal output module, a signal processing module and a signal calibration module, wherein: A signal input module, comprising at least one input channel for connecting to an external sensor and receiving an electrical signal input by the sensor; a signal output module, the signal output module comprising at least one output terminal, provided in one-to-one correspondence with the signal input module, and configured to output the electrical signal received by the signal input module; a signal processing module, the signal processing module being located between the signal input module and the signal calibration module, and / or the signal processing module being located between the signal calibration module and the signal output module; a signal calibration module, the signal calibration module being located between the signal processing modules; The sensor converts the collected measured physical quantities into electrical signals and outputs them to the signal input module in the form of voltage or current. The multiple input channels in the signal input module respectively output the received electrical signals to the signal processing module. The signal processing module preprocesses the received electrical signals to form stable and standardized electrical signals, and transmits the electrical signals to the multiple output ends of the signal output module respectively. The signal output module transmits the multiple received electrical signals to the controller in the form of voltage or current, which facilitates the observation of real-time changes in multiple measured physical quantities and enables timely adjustments.

2. The adjustable protective transmitter according to claim 1, characterized in that: The signal input module includes input channel 1, input channel 2, input channel 3, and input channel 4. The input channels 1 to 4 are independently connected to or not connected to the resistor devices of the input channels 1 to 4.

3. The adjustable protective transmitter according to claim 1, characterized in that: Input channel 1, input channel 2, input channel 3, and input channel 4 are respectively connected to resistive devices. The resistive devices have different resistance values and are connected to input channels 1 to 4 independently without affecting each other, according to the following formula: Vox=A×Vix Aox=f(Vox) (x=1,2,3,4) in: Vix is the input signal of the xth input channel; Vox, Aox are the output voltage and current signals corresponding to the x input channel; The signal output by the signal output module can be adjusted.

4. The adjustable protective transmitter according to claim 2, characterized in that: The signal output module includes output channel 1, output channel 2, output channel 3, and output channel 4. The output channels 1 to 4 are respectively provided with a voltage output terminal x and a current output terminal x, where x=1, 2, 3, 4, and the voltage output terminal x and the current output terminal x are connected to the input channels 1 to 4 in a one-to-one correspondence.

5. The adjustable protective transmitter according to claim 1, characterized in that: The signal processing module further includes: a first-stage preamplifier circuit, the first-stage preamplifier circuit being arranged between the signal input module and the signal calibration module; A voltage-current V / I conversion circuit, wherein the voltage-current V / I conversion circuit is provided between the signal output module and the signal calibration module; A two-stage amplification and filtering circuit is provided between the signal calibration module and the voltage-current V / I conversion circuit, and the voltage-current V / I conversion circuit is provided between the signal output module and the signal calibration module.

6. The adjustable protective transmitter according to claim 4, characterized in that: The signal processing module is provided in the circuit formed by the input channels 1 to 4, the voltage output terminal x, and the current output terminal x.

7. The adjustable protective transmitter according to claim 5, characterized in that: The signal processing modules are composed of integrated circuit devices, resistor devices and capacitor devices.

8. The adjustable protective transmitter according to claim 5, characterized in that: The signal processing module adopts a three-wire wiring principle.

9. The adjustable protective transmitter according to claim 1, characterized in that: The signal calibration module includes a zero-point regulator and a full-scale regulator.

10. The adjustable protective transmitter according to claim 1, characterized in that: It also includes a power supply module, which consists of a power supply and a power line. The power supply uses an instrument power supply, and the power line uses a shielded cable.

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