CN218239128U - Portable multifunctional detector for electric tea boiler of railway passenger car - Google Patents
Portable multifunctional detector for electric tea boiler of railway passenger car Download PDFInfo
- Publication number
- CN218239128U CN218239128U CN202222232531.6U CN202222232531U CN218239128U CN 218239128 U CN218239128 U CN 218239128U CN 202222232531 U CN202222232531 U CN 202222232531U CN 218239128 U CN218239128 U CN 218239128U
- Authority
- CN
- China
- Prior art keywords
- electric tea
- signal
- control unit
- plc control
- communication interface
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a multi-functional detector of portable passenger train electric drinking water boiler relates to multi-functional detector technical field. The device comprises a communication interface, a conversion module and an analog potentiometer. The communication interface is matched with the main board interface and is used for receiving input signals from the electric tea stove and transmitting output signals to the main board; the conversion module is used for converting the sensing signal of the dry burning prevention sensor into a voltage signal; the input signal at least comprises a sensing signal of an anti-dry burning sensor; when the communication interface is connected with the interface of the mainboard, the analog potentiometer is connected with the anti-dry-burning sensor in parallel. The utility model provides high multifunctional detector's security and accuracy.
Description
Technical Field
The utility model relates to a multifunctional detector technical field especially relates to a multi-functional detector of portable passenger train electric tea stove.
Background
When the traditional detector detects the dry burning prevention function of the electric tea stove, the design of a whole-course signal cable is adopted from the dry burning prevention sensor of the electric tea stove to the main control board of the electric tea stove, namely the dry burning prevention sensor of the electric tea stove is connected with the main control board of the electric tea stove by adopting the signal cable, and the signal cable has no joint and transition terminal (for example, wsd-98 type electric tea stove, the dry burning prevention sensor to the main control board of the electric tea stove are designed as a connector assembly line, and no joint and connecting terminal exist in the wiring).
Taking wsd-98 type electric tea stove as an example, the anti-dry heating sensor adopts NTC (thermistor, R25=100k, b25/50= 3950k) with negative temperature coefficient, and an operator needs to strip off the insulating layer of the signal cable and connect a 3.9K Ω ± 10% resistor to simulate and test the function of the anti-dry heating sensor and the anti-dry heating function of the electric tea stove.
Specifically, when the anti-dry heating function and the anti-dry heating sensor function of the electric tea stove are tested in a simulation mode, an operator opens a shell of the electric tea stove, and the electric tea stove is electrified and heated (without adding water) after being connected with a resistor of 3.9K omega +/-10%, and after a period of time, if the electric tea stove is not automatically powered off and stops heating, the damage of the anti-dry heating function of the electric tea stove is proved. It should be noted that the electric tea boiler is provided with a power supply, a heating and a water shortage indicator lamp to indicate the operation of the electric tea boiler. Under the normal condition, the three pilot lamps of "power", "heating", "lack of water" of electric drinking water boiler can not all be bright simultaneously, and "lack of water" pilot lamp is bright the back can be converted into lack of water protection state, prevents the dry combustion method function promptly, and electric drinking water boiler can't heat. Therefore, after the resistor is connected in parallel and the electric tea stove is dried, whether the water-shortage indicating lamp is turned on or not can be observed after a period of time, if the water-shortage indicating lamp is turned on, the dry-burning preventing function of the electric tea stove is not damaged, and if the water-shortage indicating lamp is not turned on, the dry-burning preventing function of the electric tea stove is damaged.
Then adding a proper amount of water into the electric tea stove to continue heating, keeping the shell of the electric tea stove in an open state, observing whether the dry burning prevention red light on the mainboard of the electric tea stove is lightened, and indicating that the mainboard performs dry burning prevention protection action if the dry burning prevention red light is lightened. The electric tea stove stops heating after the dry burning prevention protection action. In this scenario, the main board performs the dry-burning prevention protection action according to the sensing signal of the dry-burning prevention sensor. Therefore, if the dry burning prevention red light is lighted, the dry burning prevention sensor is proved to be not damaged, but whether the temperature detected by the dry burning prevention sensor is accurate or not is uncertain. Of course, if not lighted, it is proved that the dry burning prevention sensor may be damaged, or the dry burning prevention function of the electric tea stove main board (especially, the dry burning prevention function control circuit of the electric tea stove) may be damaged.
And then, further confirming whether the dry burning prevention sensor is damaged: the water in the water boiling tank of the electric tea stove is discharged for continuous heating, if the electric tea stove is automatically powered off and stops heating, the anti-dry heating function of the main board of the electric tea stove is proved to be normal, so that the damage of an anti-dry heating sensor can be determined; and if the electric tea stove is not automatically powered off to stop heating, the damage of the control circuit of the anti-dry heating function of the electric tea stove is proved.
In addition, after the resistor is connected with the anti-dry heating sensor (NTC), the real-time resistance value and the real-time temperature of the NTC can be measured. Taking NTC of 25=100k and b25/50=3950k as an example, after connecting 3.9K Ω ± 10% resistors in parallel, the parallel resistance of the resistors at 25 ℃ can be calculated to be about 2805 Ω according to the parallel resistance formula. At different temperatures, the resistance value of the thermistor changes, and the parallel resistance value of the thermistor and the thermistor also changes. Under the condition of obtaining the parallel resistance value, the real-time resistance value of the NTC can be reversely calculated according to a resistance parallel formula, and then the real-time temperature of the NTC can be calculated according to NTC parameters (representing the corresponding relation between the real-time resistance value and the real-time temperature). And then comparing the NTC real-time temperature with the temperature displayed by the temperature display device on the electric tea stove, if the temperature difference is within an acceptable range, indicating that the temperature detected by the dry burning prevention sensor is normal, otherwise, indicating that the temperature detected by the dry burning prevention sensor is inaccurate.
The above detection method has the following problems:
1. because the insulating layer needs to be stripped and connected in parallel, the detection mode can cause poor maintenance process and low safety, and certain potential safety hazards of equipment and running risks of the passenger train are brought to the passenger train. And, the connection lines are complicated.
2.3950K has a large NTC temperature rise amplitude, and the difference between the ambient temperature at 0 ℃ and 30 ℃ is 23K Ω, which results in a large difference between the static initial values at different ambient temperatures, and therefore, only using a fixed resistance of 3.9K Ω ± 10% results in an inaccurate test result.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a portable passenger train electric tea stove multifunctional detector has improved multifunctional detector's security and accuracy.
In order to achieve the above object, the embodiment of the present invention provides the following solutions:
the utility model provides a multi-functional detector of portable railway passenger train electric tea stove, wherein, electric tea stove is including preventing dry combustion method sensor and mainboard, prevent dry combustion method sensor pass through the connecting wire with the interface of mainboard is connected, includes:
the communication interface is matched with the interface of the mainboard and integrates a plurality of connecting wires for receiving input signals from the electric tea stove and transmitting output signals to the mainboard;
the conversion module is connected with the communication interface through a connecting wire and is used for converting the sensing signal of the dry burning prevention sensor into a voltage signal; the input signal comprises at least: a sensing signal of the dry burning prevention sensor;
the analog potentiometer is connected with the conversion module and is used for providing different resistance values; when the communication interface is connected with the interface of the mainboard, the analog potentiometer is connected with the dry burning prevention sensor in parallel.
Optionally, the PLC control unit is connected to the conversion module, the analog potentiometer, and the communication interface, respectively, and configured to:
converting the voltage signal to a digital temperature signal;
controlling the analog potentiometer to provide different resistance values;
sending a sensing signal to the mainboard at least through the communication interface so as to simulate the anti-dry sensor to send the sensing signal to the mainboard; wherein the digital temperature signal is used for displaying a temperature value on a screen; the output signal comprises at least: and the PLC control unit simulates a sensing signal sent by the dry burning prevention sensor to the mainboard.
Optionally, the screen is connected to the PLC control unit, and the screen is configured to display the digital temperature signal.
Optionally, the method further comprises: a voltage detection relay;
the voltage detection relay is connected with the communication interface and is used for converting analog voltage signals of the indicator lamps of the electric tea boiler into switching values; the input signal comprises an analog voltage signal of each indicator light.
Optionally, the voltage detection relay is connected to the PLC control unit, and the PLC control unit converts the switching value into status information of each indicator light; the status information is for display on the screen.
Optionally, the method further comprises:
and the storage module is connected with the PLC control unit and at least used for storing the digital temperature signal.
Optionally, the method further comprises:
and the alarm module is used for giving an alarm according to the control signal.
Optionally, the PLC control unit has a signal interface; the signal interface is at least used for receiving the switching value sent by the voltage detection relay and the sensing signal sent by the dry burning prevention sensor.
Optionally, the PLC control unit is further configured to simulate sensing signals sent by water level sensors at different water level poles; the water level sensor belongs to the electric tea boiler.
Optionally, comprising:
and the power supply module is respectively connected with other devices in the detector and supplies power to the other devices.
According to the utility model provides a specific embodiment discloses following technological effect:
the embodiment of the utility model provides a multi-functional detector of portable passenger train electric tea stove, multi-functional detector includes communication interface, conversion module and analog potentiometer. The communication interface is matched with the interface of the mainboard, integrates a plurality of connecting wires, and can receive input signals from the electric tea stove and transmit output signals to the mainboard.
The function of the analog potentiometer is similar to that of a fixed resistor in the prior art, when analog testing is carried out, the communication interface can be in butt joint with the interface of the electric tea stove main board, and the analog potentiometer can be connected with the anti-dry burning sensor in parallel through the connecting wire in the communication interface. Because the direct communication interface is in butt joint with the interface of the electric tea boiler mainboard, parallel connection can be realized, the insulating layer of the signal cable can be prevented from being stripped, and the safety of maintenance work is improved.
Meanwhile, the analog potentiometer can provide different resistance values, so that the problem that a detection result is not accurate enough due to the fact that a traditional detector only fixedly uses 3.9K omega +/-10% of resistors for parallel detection in daily maintenance can be solved, and accuracy is improved.
Specifically, when the detector is used for simulating and testing the function of the dry burning prevention sensor, water is added into the electric tea stove, the electric tea stove is heated, and all devices are matched as follows: after the communication interface is in butt joint with an interface of the electric tea stove main board, the conversion module converts a sensing signal from the dry burning prevention sensor into a voltage signal, and if no voltage signal exists, the dry burning prevention sensor is proved to be damaged; if the voltage signal exists, the function of the dry burning prevention sensor is proved to be normal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic structural view of a portable multifunctional detector for an electric tea boiler of a railway carriage provided by an embodiment of the utility model;
FIG. 2 is a schematic view of the portable multifunctional detector for electric tea boiler of passenger train according to the embodiment of the present invention;
FIG. 3 is an electrical schematic diagram of a portable multifunctional detector for an electric tea boiler of a passenger train according to an embodiment of the present invention;
FIG. 4 is a schematic view showing the dry combustion preventing real-time temperature of the portable multifunctional detector for an electric tea boiler of a passenger train according to the embodiment of the present invention;
FIG. 5 is a schematic view of the functional selection of the portable multifunctional detector for electric tea boiler of passenger train according to the embodiment of the present invention;
FIG. 6 is a schematic view of setting a dry-heating prevention access mode of the multifunctional detector for an electric tea boiler of a passenger train according to an embodiment of the present invention;
fig. 7 is a schematic view of the state of the electric tea boiler indicating lamp of the portable multifunctional detector for the electric tea boiler of the railway carriage according to the embodiment of the present invention;
fig. 8 is a schematic diagram of historical data of a portable multifunctional detector for an electric tea boiler of a railway carriage provided by the embodiment of the invention;
fig. 9 is a schematic diagram of an alarm display of the portable multifunctional detector for electric tea boiler of a railway carriage according to an embodiment of the present invention;
fig. 10 is a schematic diagram illustrating a water level limit access mode setting of the portable multifunctional detector for an electric tea boiler of a passenger train according to an embodiment of the present invention;
fig. 11 is the embodiment of the utility model provides a portable passenger train electric tea stove multifunctional detector's simulation limit inserts the schematic diagram.
Description of the symbols:
the device comprises a communication interface-1, a conversion module-2, an analog potentiometer-3, a PLC control unit-4, a screen-5, a voltage detection relay-6, a storage module-7, an alarm module-8 and a power supply module-9.
Detailed Description
The structure and scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and it is known by a person skilled in the art that with the occurrence of a new scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.
It is noted that, in the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or illustrations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
The embodiment of the utility model provides a portable passenger train electric tea stove multifunctional detector has solved and has need to shell signal cable insulating layer and carry out and connect resistance, only uses fixed resistance to lead to the problem that the test result is not accurate enough, has improved multifunctional detector's security and accuracy.
Fig. 1 shows an exemplary structure of the portable multifunctional detector for the electric tea boiler of the railway carriage, which comprises a communication interface 1, a conversion module 2 and an analog potentiometer 3.
In other embodiments of the present invention, the multifunctional detecting apparatus may further include a PLC control unit 4 and a screen 5. The screen 5 is connected with the PLC control unit 4, at least for displaying digital temperatures.
Of course, in other embodiments of the present invention, the PLC control unit 4 may also be connected to the screens of other devices, and may also implement the display function.
In other embodiments of the present invention, the multifunctional testing apparatus in all the above embodiments may further include a voltage detection relay 6, a storage module 7, an alarm module 8 and a power module 9.
These are described below:
the communication interface 1 is matched with an interface of a mainboard of the electric tea boiler, and the communication interface 1 integrates a plurality of connecting wires and is used for receiving input signals from the electric tea boiler and transmitting output signals to the mainboard of the electric tea boiler.
In one example, referring to fig. 3 (fig. 3 is an electrical schematic diagram of the multifunctional detector), the communication interface 1 may further include: the input plug-in unit and the output plug-in unit are integrated with a plurality of connecting wires.
The input plug-in is used for receiving input signals from the electric tea stove, and the output plug-in is used for transmitting output signals to the mainboard.
The input signal comprises at least: and (4) preventing sensing signals of the dry burning sensor.
The sensing signal may specifically be a current signal, a voltage signal, a resistance signal, or the like.
The input and output cards may be specifically DB-15 connector interfaces.
The conversion module 2 is electrically connected with the communication interface 1 through a connecting wire, and the conversion module 2 is at least used for converting a sensing signal of the dry burning prevention sensor into a voltage signal.
In one example, the conversion module 2 may specifically be an NTC signal detection conversion module/board.
Still referring to fig. 1, the analog potentiometer 3 is connected to the conversion module 2, and the analog potentiometer 3 is used for providing different resistances. When the communication interface 1 is connected with the interface of the mainboard, the analog potentiometer 3 is connected with the anti-dry heating sensor in parallel to output signals. The analog potentiometer 3 may be embodied as a variable resistance resistor, for example.
The analog potentiometer 3 and the dry burning prevention sensor are connected in parallel in various ways, for example, when the communication interface 1 is connected with an interface of a mainboard, two ends of the dry burning prevention sensor can be respectively connected with two terminals of an input plug-in through the interface on the mainboard, and the two terminals are connected with two pins of a PLC control unit 4 through a connecting wire, so that two ends of the dry burning prevention sensor are connected with two pins of the PLC control unit 4; meanwhile, two ends of the analog potentiometer 3 are respectively connected with two pins which are the same as those of the PLC control unit 4. Then parallel connection of the two may be achieved.
For another example, when the communication interface 1 is connected to an interface of a motherboard, two ends of the dry-burning prevention sensor may be respectively connected to two terminals of the input card through the interface on the motherboard, and two ends of the analog potentiometer 3 are also connected to two terminals of the input card, or the two terminals may be connected in parallel.
In addition, the two terminals can be connected with two pins of other equipment through connecting wires, and meanwhile, the two ends of the analog potentiometer 3 are respectively connected with the two pins of the other equipment. Parallel connection of the two can be achieved as well.
Referring to fig. 1 and 3, the PLC control unit 4 is respectively connected to the conversion module 2, the analog potentiometer 3, and the communication interface 1, and the PLC control unit 4 is configured to:
1) Controlling the analog potentiometer 3 to provide different resistance values; of course, in other embodiments of the present invention, the analog potentiometer 3 can be replaced by a traditional mechanical potentiometer, the mechanical potentiometer is an adjustable potentiometer with a resistance value of 0-5K, and the resistance value can be changed by adjusting the knob of the mechanical potentiometer, in which case the PLC control unit 4 may not be used to control the potentiometer to provide the resistance value.
2) And converting the voltage signal converted by the conversion module 2 into a digital temperature signal. The digital temperature signal is used for displaying a temperature value on the screen 5;
the voltage signal can be a linear voltage value, and a digital signal based on the linear voltage value is more accurate and visual, while the traditional detector cannot convert a temperature signal into a voltage signal.
As mentioned above, the voltage signal is obtained by converting the sensing signal of the NTC sensor by the conversion module 2. The resistance of the NTC is not linearly related to temperature.
In one example, the sensing signal can be used to characterize a resistance value, and a linear relationship between the resistance value and a linear voltage value can be designed. Specifically, the resistance R corresponds to the voltage value a, the resistance 2R corresponds to the voltage value 2a, and the PLC control unit 4 presets a correspondence relationship between the voltage value and the temperature, for example, NTC of R25=100k, and b25/50= 3950k) model, which can be determined based on a parameter relationship between the resistance and the temperature involved in the model, and the PLC control unit 4 can convert the linear voltage value into a corresponding temperature value according to the preset correspondence relationship.
In yet another example, the linear voltage value is linearly related to the temperature value. Specifically, temperature t corresponds to voltage value a, and temperature 2t corresponds to voltage value 2a. Still taking the specific characterization of the resistance value of the sensing signal as an example, for an NTC model of R25=100k and b25/50=3950k, the corresponding relationship between the sensing signal and the linear voltage value may be determined based on the parameter relationship between the resistance value and the temperature related to the model, and the conversion module may convert the sensing signal into the corresponding linear voltage value according to the preset corresponding relationship. In the PLC control unit 4, the linear correspondence between the linear voltage value and the temperature may be preset, and the PLC control unit 4 may convert the linear voltage value into a corresponding temperature value according to the preset linear correspondence.
3) And sending a sensing signal to the mainboard to simulate the dry burning prevention sensor to send the sensing signal to the mainboard.
In one example, the PLC control unit 4 may send the sensing signal to the main board through the conversion module 2, the analog potentiometer 3, and the communication interface 1.
Specifically, the signal sent by the PLC control unit 4 may be: the sensing signal directly identified by the electric tea stove mainboard plays a role in transparent transmission through the conversion module 2, the analog potentiometer 3 and the communication interface 1.
Or, the signal sent by the PLC control unit 4 cannot be directly recognized by the electric tea boiler main board, and the signal sent by the PLC control unit 4 can be converted into the sensing signal by the conversion module 2. For example, assume that the sensing signal is a voltage signal of 0 to aV, and the PLC control unit 4 transmits signals of: and if C is not equal to a, the conversion module 2 can convert the voltage signals of 0 to CV into voltage signals of 0 to aV.
For another example, assume that the sensing signal is a voltage signal of 0 to aV, and the signal sent by the PLC control unit 4 is: the conversion module 2 can convert the current signals of 0 to bA into voltage signals of 0 to aV.
In another example, the PLC control unit 4 may send the sensing signal to the main board directly through the communication interface 1.
Accordingly, the aforementioned output signals comprise at least: and simulating a sensing signal sent to the mainboard by the dry burning prevention sensor.
Specifically, referring to fig. 4, the plc control unit 4 can simulate the sensing signal of the dry-heating preventing temperature sensor of the electric tea boiler within the range of 0 ℃ to 200 ℃, and the specific temperature value is displayed in the D13 display frame. Of course, before using, the communication interface 1 of the multifunctional detector needs to be butted to the interface of the electric tea stove mainboard, and the temperature rise test of the dry burning prevention temperature sensor and the dry burning prevention function detection of the electric tea stove mainboard can be carried out by utilizing the PLC control unit 4.
When the dry burning prevention function of the mainboard is detected, the PLC control unit 4 can simulate and output a sensing signal corresponding to 105 ℃ -200 ℃ (because the boiling of water is 100 ℃ under the condition of water, and the temperature can be above 100 ℃ under the condition of no water, because the dry burning prevention function is required to be tested, the sensing signal corresponding to 105 ℃ -200 ℃) can be selectively output to the electric tea stove mainboard, and the specific expected temperature value is displayed in a D130 display frame. D13 and D130 are code numbers.
In summary, the communication interface 1 is adapted to the interface of the main board, and the communication interface 1 integrates a plurality of connecting wires, and can receive the input signal from the electric tea boiler and transmit the output signal to the main board. The function of the analog potentiometer 3 is similar to that of a fixed resistor in the prior art, when analog test is carried out, the communication interface 1 can be butted with an interface of an electric tea stove main board, and the analog potentiometer 3 can be connected with an anti-dry burning sensor in parallel through a connecting wire in the communication interface. Because the direct communication interface 1 is in butt joint with the interface of the electric tea boiler mainboard, parallel connection can be realized, the insulating layer of the signal cable can be prevented from being stripped, and the safety of maintenance work is improved. Meanwhile, the analog potentiometer 3 can provide different resistance values, so compared with the fixed parallel detection of the resistors of 3.9K omega +/-10%, the analog potentiometer can support the analog test by using different resistance values, and the accuracy of the detection result can be improved.
Specifically, when the dry burning prevention sensor function is simulated and tested by using the detector, water is added into the electric tea boiler and is heated, and all devices are matched as follows: after the communication interface is in butt joint with an interface of the electric tea stove main board, a conversion module converts a sensing signal from the dry burning prevention sensor into a voltage signal, and if no voltage signal exists, the dry burning prevention sensor is proved to be damaged; if the voltage signal exists, the function of the dry burning prevention sensor is proved to be normal.
Besides the dry-burning prevention sensor, a water level sensor is also arranged in the electric tea stove. The water level sensor may also be simulated using a multi-function detector.
In this embodiment, the output signal further includes: and simulating a water level sensing signal sent by the water level sensor.
In one example, the PLC control unit 4 may directly transmit the water level sensing signal to the main board through the communication interface 1. In another example, the PLC control unit 4 may also send the water level sensing signal to the motherboard through the conversion module 2, the analog potentiometer 3, and the communication interface 1. The signals sent by the PLC control unit 4 may be: the water level sensing signal directly identified by the electric tea stove mainboard plays a role in transparent transmission through the conversion module 2, the analog potentiometer 3 and the communication interface 1.
Or, the signal sent by the PLC control unit 4 cannot be directly recognized by the electric tea boiler main board, and the signal sent by the PLC control unit 4 can be converted into the water level sensing signal by the conversion module 2. The specific implementation is similar to the above description, and is not described herein again.
In yet another example, the PLC control unit 4 may also transmit a water level sensing signal to the main board through the voltage detection relay 6 and the communication interface 1. The details will be described later in the voltage detection relay 6 section.
The electric tea boiler comprises a water boiling tank and a water storage tank, wherein the water boiling tank and the water storage tank are both provided with water level sensors for monitoring the water level.
Referring to fig. 10, the plc control unit 4 can simulate the states of the water level poles of the water boiling tank and the water storage tank of the electric tea boiler by simulating the water level sensing signals, i.e. the setting of the water level pole access mode displayed on the screen 5. The water level poles include a maximum water level and a minimum water level.
That is, the water level sensing signal that multi-functional detector sent can be used to the sign: the water level of the water boiling tank is at the highest level, the water level of the water boiling tank is at the lowest level, the water level of the water storage tank is at the highest level, and the water level of the water storage tank is at the lowest level.
Aiming at the water level pole, the electric tea stove main board can perform corresponding actions, and whether the functions of the main board are normal or not can be judged by observing whether the electric tea stove main board performs expected actions or not.
In other embodiments of the present invention, an action signal (e.g., a dry-burning protection action signal) of the motherboard can be transmitted through the communication interface 1, processed by the PLC control unit 4 into a signal suitable for screen display, and displayed on the screen.
The aforementioned input signals may further include: an action signal of the mainboard.
In one example, still referring to fig. 3, the plc control unit 4 has a signal interface. The signal interface is at least used for receiving the switching value converted by the voltage detection relay 6 and the sensing signal sent by the dry burning prevention sensor.
Referring to fig. 5, the plc control unit 4 has an extended function. According to the existing hardware condition of the multifunctional detector, the PLC control unit 4 realizes the detection of the function of the brake monitoring host of the railway passenger car through secondary programming design, and a certain upgrading space is reserved in the later stage, so that the aim of detecting multiple electric devices of the railway passenger car by using the multifunctional detector is fulfilled.
The screen 5 is described below.
Still referring to fig. 1, a screen 5 is connected to the PLC control unit 4, and the screen 5 is used for displaying the digital temperature signal.
In one example, the screen 5 may specifically employ a touch screen or other display. The screen 5 can display different contents, and is convenient for man-machine interaction.
For example, referring to fig. 6, the function of the "dry burning prevention access mode" on the screen 5 includes three detection modes, namely "actual dry burning prevention access output of the electric tea boiler, simulated dry burning prevention output of the detector, and dry burning prevention parallel access output", and can be switched arbitrarily according to actual use requirements, so as to bring good human-computer interaction experience. The three detection modes correspond to three control programs of the PLC control unit 4.
The voltage detection relay 6 will be described below.
Still referring to fig. 1, the voltage detection relay 6 is connected to the communication interface 1, and the voltage detection relay 6 is configured to convert the analog voltage signal of each indicator light of the electric tea boiler into a switching value; the input signal mentioned above may comprise an analog voltage signal of each indicator light.
The voltage detection relay 6 is connected with the PLC control unit 4, and the PLC control unit 4 converts the switching value into the state information of each indicator light; the status information is for display on the screen 5.
In one example, the indicator light includes: power supply, heating and water shortage indicator lights. Accordingly, referring to fig. 7, three indicator light icons "power, heating and water out" are displayed on the screen 5, which are respectively denoted by X0, M0 and X1.
If none of the three indicator light icons is on, the voltage detection relay 6 does not convert the analog voltage signals of the indicator lights of the electric tea stove into switching values or the communication interface 1 is not connected with the main board interface.
After the communication interface 1 is connected with the main board interface, the voltage detection relay 6 converts the analog voltage signals of each indicator lamp of the electric tea stove into switching values, and the PLC control unit 4 converts the switching values into the state information of each indicator lamp to be displayed on the screen 5. If the status information exists, the corresponding indicator light icon on the screen 5 is on, and if a certain indicator light does not have corresponding status information, the corresponding indicator light icon on the screen 5 is not on. Therefore, a judgment basis and a detection means can be provided for the staff to quickly judge whether elements such as the electromagnetic valve, the heating pipe and the like in the electric tea stove have faults.
In addition, when the dry burning prevention function of the electric tea stove is simulated and tested by using the detector, it is mentioned that if the electric tea stove is automatically powered off and stops heating, the dry burning prevention function of the electric tea stove is proved to be normal; otherwise, the anti-dry heating function of the electric tea stove is proved to be abnormal.
In this embodiment, whether "whether electricity tea-urn furnace auto-power-off stop heating" is judged to "water deficiency" pilot lamp icon on the accessible screen lights up, if light, indicates that electricity tea-urn furnace auto-power-off stop heating, and its stove prevents dry combustion method function is normal, otherwise, indicates that electricity tea-urn furnace does not auto-power-off stop heating.
As mentioned above, the PLC control unit 4 may also transmit the water level sensing signal to the main board through the voltage detection relay 6 and the communication interface 1. Specifically, the PLC control unit 4 may preset a relationship between different water level poles and switching values or switching combinations, and send corresponding switching values or switching value combinations to the voltage detection relay 6 according to the relationship, and the voltage detection relay 6 may convert the switching values or switching value combinations into water level sensing signals recognizable by the motherboard, and transmit the water level sensing signals to the motherboard through the communication interface 1.
The memory module 7 is described below.
Still referring to fig. 1, the storage module 7 is connected to the PLC control unit 4, and the storage module 7 is at least used for storing the temperature value in the digital temperature signal.
Of course, the storage module 7 may also store the date, time, etc. corresponding to the temperature value.
Furthermore, the storage module 7 may also be used for storing other data, such as alarm information, as will be described later herein. Referring to fig. 8, the screen 5 may be used to display the history data stored in the storage module 7. Each piece of historical data may illustratively include a date, a time, and a dry-fire prevention real-time temperature.
The alarm module 8 is described below.
Still referring to fig. 1, the alarm module 8 is connected to the PLC control unit 4, and the alarm module 8 is configured to send an alarm according to the control signal;
the PLC control unit 4 sends out a control signal when the heating state duration of the electric tea boiler exceeds the threshold time and/or the temperature value exceeds the threshold temperature; the threshold time and the threshold temperature can be set by the PLC control unit 4.
In one example, please refer to fig. 9, the multifunctional detector has an over-temperature alarm function, when the electric tea stove main board receives a sensing signal of the dry burning prevention sensor or a simulated sensing signal, the screen 5 can accurately display a temperature value of the electric tea stove main board during the dry burning prevention action and a duration time of a heating state of the electric tea stove in real time, and alarm, that is, the over-temperature alarm function is activated when the duration time of the heating state of the electric tea stove exceeds a threshold time and/or a temperature value exceeds a threshold temperature. The storage module 7 can store the alarm data.
The duration may be determined based on status information of the indicator light. The status information of the aforementioned "heating" indicator light can be displayed on the screen 5, and the time when heating is started and the duration of the heating state can be recorded according to the status information of the indicator light. Therefore, the staff can accurately detect the dry burning prevention action parameters of the electric tea stove by looking up historical data and carry out fault analysis and judgment, so that whether the dry burning prevention function of the electric tea stove is qualified or not is judged.
Referring to fig. 9, the alarm information displayed on the screen 5 may exemplarily include time, date and message, wherein a D13 display frame is used for displaying a temperature value, and the lower right corner of the screen 5 displays the current time.
The power supply module 9 is described below.
Still referring to fig. 1, the power module 9 is respectively connected to other devices in the multifunctional detector to supply power to the other devices; other devices include at least: PLC control unit 4, conversion module 2, screen 5 and voltage detection relay 6.
In an example, referring to fig. 3 again, the power module 9 specifically includes a 24V lithium battery, a charging and discharging circuit and a charging interface. The operation of the portable multifunctional detector for the electric tea boiler of the railway carriage is described below.
Referring to fig. 2, the operation steps based on the multifunctional detector illustratively include:
step 1: and pressing a power supply power-on key, powering on and initializing the multifunctional detector, and displaying an initialization interface.
Step 2: entering an electric tea stove water level pole setting interface, and selecting the access of an electric tea stove actual water level sensor or the access of a detector simulation water level sensor.
If the analog water level pole of the detector is selected to be connected, the analog water level sensing signal can be transmitted to the electric tea stove mainboard in real time through the PLC control unit 4 to change the state of the water level pole of the water boiling tank and/or the water storage tank of the electric tea stove, so that different working conditions of the electric tea stove can be simulated.
In one example, the sensing signal currently incoming to the motherboard may be displayed on a screen. Referring to fig. 11, the monitor is displayed on the screen 5 to simulate the connection of the pole, the connection of the long pole of the boiling water tank indicates that the highest water level information of the boiling water tank is inputted into the multifunctional monitor, and the connection of the "M102 off indicator" indicates that the highest water level information of the boiling water tank is not inputted. The pole of the end of the water boiling tank is connected with a multifunctional detector for inputting the information indicating the lowest water level of the water boiling tank, and the information indicating the lowest water level of the water boiling tank is not input when an indicator lamp M113 is turned off. The information of the highest water level of the water storage tank is input into the multifunctional detector when the long pole of the water storage tank is connected, and the information of the highest water level of the water storage tank is not input when the M114 turn-off indicator lamp is turned on. The common end of the pole is connected with a multifunctional detector for inputting the same water level height information of the water boiling tank and the water storage tank, and the fact that the same water level height information of the water boiling tank and the water storage tank is not input is indicated when the M104 off indicator lamp is turned on. "M102, M113, M114 and M104" are code numbers.
And step 3: entering an electric tea stove dry burning prevention access mode setting interface, and selecting actual dry burning prevention access of the electric tea stove or simulating dry burning prevention access by a detector.
If the detection instrument is selected to simulate the dry burning prevention access mode, the PLC control unit 4 can simulate a temperature sensing signal to be transmitted to the NTC detection conversion plate (conversion module 2) in real time, and different resistance values can be provided by adjusting the resistance value of the potentiometer (simulating the potentiometer 3). For a detailed description, reference is made to the preceding description.
If the actual dry-burning prevention access mode of the electric tea boiler is selected, the sensing signal (i.e. the real sensing signal) of the dry-burning prevention probe (dry-burning prevention sensor) of the electric tea boiler is transmitted to the NTC detection conversion board (conversion module 2) through the main board, and the temperature value is finally displayed on the screen through a series of processing (see the above description). The real-time temperature value change of the dry burning prevention sensor of the electric tea stove is detected by the multifunctional detector, and the performance of the dry burning prevention sensor is judged. For a detailed description, reference is made to the preceding description.
And 4, step 4: entering an anti-dry heating real-time temperature display interface of the electric tea stove, and displaying the temperature rise state of an anti-dry heating probe (an anti-dry heating sensor) and the anti-dry heating protection action time in real time. The temperature rise state is the state when the temperature of the anti-dry heating probe continuously rises (specifically, the temperature can comprise the duration, the temperature rising from the starting moment of temperature rising to the current moment, and the like), and the anti-dry heating protection action time is the moment when an anti-dry heating protection action signal is transmitted from the mainboard.
And 5: get into electric drinking water boiler pilot lamp state display interface, the electric work of voltage detection relay 6, show electric drinking water boiler "power", "heating", "lack of water" pilot lamp state in real time, make things convenient for maintenance detection personnel to master electric drinking water boiler current operating mode in real time.
Step 6: entering an alarm and recording interface, checking the temperature and the working time of the electric tea stove during the dry burning prevention action, and simulating the temperature value corresponding to the temperature sensing signal simulated by the potentiometer 3.
When the multifunctional detector detects a temperature sensing signal exceeding a threshold temperature (120 ℃), the alarm module 8 is triggered to buzz and alarm. When the time (30 seconds) of the electric tea stove in the dry-burning state exceeds the threshold value and is not 120 ℃, the alarm module 8 is triggered to give an alarm.
Of course, the order of step 2-step 6 may be interchanged with one another.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and implementation of the embodiments of the present invention are explained herein by applying specific examples, and the above descriptions of the embodiments are only used to help understand the method and core ideas of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the idea of the embodiment of the present invention, there are changes in the specific implementation and application scope. In summary, the content of the present specification should not be construed as limiting the embodiments of the present invention.
Claims (10)
1. The utility model provides a multi-functional detector of portable railway passenger train electric tea stove, wherein, electric tea stove is including preventing dry combustion method sensor and mainboard, prevent dry combustion method sensor pass through the connecting wire with the interface of mainboard is connected, its characterized in that includes:
the communication interface is matched with the interface of the mainboard, and the communication interface integrates a plurality of connecting wires and is used for receiving input signals from the electric tea stove and transmitting output signals to the mainboard;
the conversion module is connected with the communication interface through a connecting wire and is used for converting the sensing signal of the dry burning prevention sensor into a voltage signal; the input signal comprises at least: a sensing signal of the dry burning prevention sensor;
and the analog potentiometer is connected with the conversion module and is connected with the dry burning prevention sensor in parallel when the communication interface is connected with the interface of the mainboard.
2. The portable multifunctional detector for the electric tea boiler of the railway carriage as claimed in claim 1, which comprises:
the PLC control unit is respectively connected with the conversion module, the analog potentiometer and the communication interface and is used for:
converting the voltage signal to a digital temperature signal;
controlling the analog potentiometer to provide different resistance values;
sending a sensing signal to the mainboard at least through the communication interface so as to simulate the anti-dry sensor to send the sensing signal to the mainboard; wherein the digital temperature signal is used for displaying a temperature value on a screen; the output signal comprises at least: and the PLC control unit simulates a sensing signal sent by the dry burning prevention sensor to the mainboard.
3. The portable multifunctional detector for the electric tea boiler of the railway carriage as claimed in claim 2, comprising:
the screen is connected with the PLC control unit and used for displaying the digital temperature signal.
4. The portable multifunctional detector for electric tea stove of railway carriage as claimed in claim 3,
further comprising: a voltage detection relay;
the voltage detection relay is connected with the communication interface and is used for converting analog voltage signals of the indicator lamps of the electric tea boiler into switching values; the input signal comprises an analog voltage signal of each indicator light.
5. The multifunctional detector of claim 4, wherein the voltage detection relay is connected to the PLC control unit, and the PLC control unit converts the switching value into status information of each indicator light; the status information is for display on the screen.
6. The portable multifunctional detector for the electric tea boiler of the railway carriage as claimed in claim 2, further comprising:
and the storage module is connected with the PLC control unit and at least used for storing the digital temperature signal.
7. The portable multifunctional detector for the electric tea boiler of the railway carriage as claimed in claim 2, further comprising:
and the alarm module is used for giving an alarm according to the control signal.
8. The portable multifunctional detector for the electric tea boiler of the railway carriage as claimed in claim 4, wherein the PLC control unit has a signal interface; the signal interface is at least used for receiving the switching value sent by the voltage detection relay and the sensing signal sent by the dry burning prevention sensor.
9. The portable multifunctional detector for the electric tea boiler of the railway carriage as claimed in claim 2, wherein the PLC control unit is further configured to simulate sensing signals sent by water level sensors at different water level poles; the water level sensor belongs to the electric tea boiler.
10. The portable multifunctional detector for the electric tea boiler of the railway carriage as claimed in claim 4, comprising:
the power module is respectively connected with the conversion module, the PLC control unit, the screen and the voltage detection relay, and the power module is used for supplying power to the conversion module, the PLC control unit, the screen and the voltage detection relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222232531.6U CN218239128U (en) | 2022-08-24 | 2022-08-24 | Portable multifunctional detector for electric tea boiler of railway passenger car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222232531.6U CN218239128U (en) | 2022-08-24 | 2022-08-24 | Portable multifunctional detector for electric tea boiler of railway passenger car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218239128U true CN218239128U (en) | 2023-01-06 |
Family
ID=84683690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222232531.6U Active CN218239128U (en) | 2022-08-24 | 2022-08-24 | Portable multifunctional detector for electric tea boiler of railway passenger car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218239128U (en) |
-
2022
- 2022-08-24 CN CN202222232531.6U patent/CN218239128U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8447543B2 (en) | Electric vehicle simulator and analyzer (EVSA) for electric vehicle supply equipment | |
| CN103558487B (en) | A kind of priming system line detection system | |
| CN108362332A (en) | A kind of electrical control cabinet tele-control system based on Internet of Things | |
| CN102236087A (en) | Withstand voltage test device and method of three-phase electric energy meter | |
| CN114295906A (en) | Portable charging pile operation and maintenance patrol instrument, intelligent client, operation and maintenance method and system | |
| CN111313327A (en) | Handheld intelligent electric line parameter inspection device, system and method | |
| CN218239128U (en) | Portable multifunctional detector for electric tea boiler of railway passenger car | |
| CN115200746A (en) | Portable multifunctional detector for electric tea boiler of railway passenger car | |
| CN217605150U (en) | Disconnection diagnosis system of thermal resistor | |
| CN203037844U (en) | Intelligent testing device for electric energy meter built-in load switch | |
| CN211655569U (en) | Handheld intelligent electric line parameter inspection device and system | |
| CN211928099U (en) | Electric control board, control board and test system | |
| CN211263622U (en) | Insulation resistance detection device and system | |
| CN209342812U (en) | A kind of earth-continuity tester | |
| CN108631394B (en) | Internal resistance detection sensor | |
| CN111579873A (en) | Electric heater test method, device, circuit and equipment | |
| CN207022367U (en) | Heat abstractor and battery detection equipment | |
| CN218917542U (en) | Charging and discharging module detection device | |
| CN218788060U (en) | Intelligent current detection recorder | |
| CN205080192U (en) | A intelligent insulation tester for track transportation vehicles | |
| CN220063034U (en) | Portable detection device | |
| CN216746826U (en) | Thermal cycle test device | |
| CN220525903U (en) | Seeker interface voltage measurement control device | |
| CN214669483U (en) | Portable platform door system motor state detection device | |
| CN217213101U (en) | Safety detection circuit of power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |