CN105157965A - Device and system for detecting pressure switch setting value and regulating system - Google Patents
Device and system for detecting pressure switch setting value and regulating system Download PDFInfo
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- CN105157965A CN105157965A CN201510454714.4A CN201510454714A CN105157965A CN 105157965 A CN105157965 A CN 105157965A CN 201510454714 A CN201510454714 A CN 201510454714A CN 105157965 A CN105157965 A CN 105157965A
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Abstract
The invention discloses a device and system for detecting a pressure switch setting value and a regulating system. The detection device includes a monitoring point interface, on-off action indicator lights, a pressure increasing interface, a pressure reducing interface and a pressure detection interface. The pressure increasing interface and the pressure reducing interface which are used for regulating pressure, the pressure detection interface used for detecting a pressure value, and the on-off action indicator lights used for indicating an action state of a pressure switch are integrated on the detection device, thereby ensuring synchronization of three actions which include pressure regulation, observation of whether action of the pressure switch occurs and observation of the pressure value, and solving the problems existing in the prior art that pressure regulation is inconvenient, and an action judgment basis of the pressure switch is not convenient and visual enough.
Description
Technical Field
The invention relates to the technical field of pressure switches, in particular to a pressure switch setting value detection device, system and adjusting system.
Background
The pressure switch is an important component of the locomotive brake cabinet, the pressure switch can sense the air pressure of a monitored point, and when the air pressure of the monitored point is higher or lower than the pressure setting value of the pressure switch, a switch contact inside the pressure switch can be switched on or off, so that the function of controlling circuit conversion by utilizing the change of the air pressure is realized.
It can be seen that the pressure setting is an important parameter of the pressure switch. If the actual pressure setting value of the pressure switch is not consistent with the rated pressure setting value of the pressure switch, the actual action of the switch contact of the pressure switch is inconsistent with the expected action, so that a brake system receives wrong control instructions, and the safe operation of the locomotive is seriously influenced. Therefore, in order to ensure that the pressure setting value of the pressure switch meets the requirement, the pressure setting value of the pressure switch needs to be detected before the pressure switch is put into practical use.
When the prior art is used for detecting the pressure setting value of the pressure switch, a plurality of actions such as pressure regulation, observation of whether the pressure switch acts, observation of the pressure value and the like need to be involved. However, it is difficult to ensure the synchronization among the actions in actual detection, so that the actual pressure setting value of the pressure switch cannot be accurately detected, and the subsequent adjustment precision of the pressure setting value is affected. Meanwhile, the problems that pressure adjustment is inconvenient, the action judgment basis of a pressure switch is not convenient and visual and the like exist in the prior art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a device, a system, and a system for detecting a setting value of a pressure switch, which ensure synchronization between three actions, i.e., pressure adjustment, whether the pressure switch is actuated or not, and pressure value observation, and solve the problems in the prior art, such as inconvenience in pressure adjustment, inconvenience in actuation determination of the pressure switch, and the like. The specific scheme is as follows:
a detection device for a pressure switch setting value comprises:
the monitoring point interface is used for being connected with a quick connector of the pressure switch so as to communicate with an air passage between the detection device and the pressure switch;
the switch action indicator light is connected with the pressure switch and used for acquiring a boosting action signal and a reducing action signal of the pressure switch; when the boosting action signal is acquired, the working state of the pressure switch is changed to prompt the outside to generate boosting action; when the pressure reduction action signal is acquired, the working state of the pressure reduction action signal is changed to prompt the outside that the pressure switch generates pressure reduction action;
the pressure boosting interface is used for transmitting pressure air into the detection device when a pressure setting value corresponding to the pressure boosting action of the pressure switch needs to be detected so as to increase the pressure at the monitoring point interface until the pressure switch generates the pressure boosting action signal;
the pressure reducing interface is used for discharging pressure air out of the interior of the detection device when a pressure setting value corresponding to the pressure reducing action of the pressure switch needs to be detected so as to reduce the pressure at the monitoring point interface until the pressure switch generates a pressure reducing action signal;
and the pressure detection interface is used for being connected with a pressure display instrument and displaying the pressure value of the pressure at the monitoring point interface in real time through the pressure display instrument.
Preferably, the detection device further comprises a pressure-increasing rate regulating valve arranged at the pressure-increasing interface and a pressure-decreasing rate regulating valve arranged at the pressure-decreasing interface;
and the boosting rate regulating valve is used for regulating the air transmission rate when the boosting interface transmits the pressure air into the detection device.
And the pressure reduction rate regulating valve is used for regulating the air discharge rate when the pressure reduction interface extrudes the pressure air out of the detection device.
Preferably, the detection means comprises one of the switch actuation indicator lights;
when the boosting interface transmits the pressure air into the detection device and before the pressure switch generates the boosting action signal, the working state of the switch action indicator lamp is in an off state; when the pressure switch generates the boosting action signal, the working state of the switch action indicator lamp is a light-emitting state;
when the pressure reducing interface extrudes pressure air out of the detection device and before the pressure switch generates the pressure reducing action signal, the working state of the switch action indicator lamp is a luminous state; when the pressure switch generates the pressure reduction action signal, the working state of the switch action indicator lamp is an off state.
Preferably, the switch operation indicator lamp in the detection device includes a voltage-increasing operation indicator lamp and a voltage-decreasing operation indicator lamp;
the boosting action indicating lamp is used for acquiring the boosting action signal, and when the boosting action signal is acquired, the working state of the boosting action indicating lamp is changed to prompt the outside that the pressure switch generates boosting action;
the pressure reducing action indicator lamp is used for acquiring the pressure reducing action signal, and when the pressure reducing action signal is acquired, the working state of the pressure reducing action indicator lamp is changed to prompt the outside that the pressure switch generates the pressure reducing action.
Preferably, the switch action indicator light, the voltage boosting interface, the voltage reducing interface and the pressure detection interface are all arranged on the same side face of the detection device.
A detection system for a pressure switch setting value comprises the detection device;
the detection device is used for detecting a pressure setting value corresponding to the pressure switch generating the boosting action or detecting a pressure setting value corresponding to the pressure switch generating the pressure reduction action;
the detection system further comprises:
the gas device is used for transmitting pressure air to the detection device through the boosting interface;
and the pressure display instrument is used for detecting and displaying the pressure value of the pressure at the monitoring point interface.
Preferably, the pressure display instrument is a digital pressure display instrument.
A pressure switch setting value adjusting system comprises the detection system; further comprising:
and the setting value adjusting device is used for adjusting the setting value of the pressure switch when the pressure setting value actually detected by the detection device in the detection system is inconsistent with the rated pressure setting value of the pressure switch until the pressure setting value actually detected by the detection device is consistent with the rated pressure setting value.
Preferably, the regulating system further comprises a setting value judging device; the setting value judgment device comprises a setting value judgment unit and a judgment result display unit;
the setting value judging unit is used for acquiring a pressure value detected by the pressure display instrument at the moment when the working state of a switch action indicator lamp of the detection device changes, determining the pressure value as an actual pressure setting value of the switch action, and judging whether the pressure setting value is consistent with a corresponding rated pressure setting value or not;
and the judgment result display unit is used for acquiring the judgment result of the setting value judgment unit and displaying the judgment result.
Preferably, the adjusting system further comprises a voice prompt device;
and the voice prompt device is used for sending voice prompt information when the setting value judgment unit judges that the actual pressure setting value of the switch action is consistent with the corresponding rated pressure setting value.
In the invention, a monitoring point interface, a switch action indicator lamp, a boosting interface, a voltage reducing interface and a pressure detection interface are integrated on the detection device. The monitoring point interface can be used for communicating an air path between the detection device and the pressure switch; the switch action indicator lamp can be used for prompting the outside whether the pressure switch generates a boosting action or a reducing action; the pressure boosting interface can be used for transmitting pressure air into the interior of the detection device so as to enable the pressure switch to generate a pressure boosting action signal; the pressure reducing interface can be used for discharging pressure air out of the interior of the detection device so as to enable the pressure switch to generate a pressure reducing action signal; the pressure detection interface can be used for being connected with a pressure display instrument, and the pressure value of the pressure at the monitoring point interface is displayed in real time through the pressure display instrument. Therefore, the pressure switch and the pressure regulating method have the advantages that the pressure increasing interface and the pressure reducing interface for regulating the pressure, the pressure detecting interface for detecting the pressure value and the switch action indicating lamp for indicating the action state of the pressure switch are integrated on the detecting device, so that the synchronism among three actions of pressure regulation, pressure switch action observation and pressure value observation is ensured, and the problems that the pressure regulation is inconvenient, the action judgment basis of the pressure switch is inconvenient and intuitive and the like in the prior art are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a detection device for a setting value of a pressure switch, which is disclosed by an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a system for detecting a setting value of a pressure switch according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a system for adjusting a setting value of a pressure switch according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a specific pressure switch setting value adjusting system disclosed in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a detection device for a pressure switch setting value, which is shown in figure 1 and comprises the following components:
the monitoring point interface 101 is used for being connected with a quick connector of the pressure switch so as to be communicated with an air passage between the detection device and the pressure switch;
the switch action indicator lamp 102 is connected with the pressure switch and used for acquiring a voltage boosting action signal and a voltage reducing action signal of the pressure switch; when a boosting action signal is acquired, the working state of the pressure switch is changed to prompt the outside to generate boosting action of the pressure switch; when the pressure reduction action signal is acquired, the working state of the pressure reduction action signal is changed to prompt the outside that the pressure switch generates the pressure reduction action;
the pressure boosting interface 103 is used for transmitting pressure air into the detection device when a pressure setting value corresponding to the pressure boosting action of the pressure switch needs to be detected so as to increase the pressure at the monitoring point interface 101 until the pressure switch generates a pressure boosting action signal;
the pressure reducing interface 104 is used for discharging pressure air out of the interior of the detection device when a pressure setting value corresponding to the pressure reducing action of the pressure switch needs to be detected so as to reduce the pressure at the monitoring point interface 101 until the pressure switch generates a pressure reducing action signal;
and the pressure detection interface 105 is used for being connected with a pressure display instrument and displaying the pressure value of the pressure at the monitoring point interface 101 in real time through the pressure display instrument.
In the embodiment of the invention, the detection device is integrated with a monitoring point interface, a switch action indicator lamp, a boosting interface, a voltage reduction interface and a pressure detection interface. The monitoring point interface can be used for communicating an air path between the detection device and the pressure switch; the switch action indicator lamp can be used for prompting the outside whether the pressure switch generates a boosting action or a reducing action; the pressure boosting interface can be used for transmitting pressure air into the interior of the detection device so as to enable the pressure switch to generate a pressure boosting action signal; the pressure reducing interface can be used for discharging pressure air out of the interior of the detection device so as to enable the pressure switch to generate a pressure reducing action signal; the pressure detection interface can be used for being connected with a pressure display instrument, and the pressure value of the pressure at the monitoring point interface is displayed in real time through the pressure display instrument. Therefore, the pressure regulating device integrates the pressure increasing interface and the pressure reducing interface for regulating the pressure, the pressure detecting interface for detecting the pressure value and the switch action indicating lamp for indicating the action state of the pressure switch on the detecting device, so that a technician can conveniently observe the action of the pressure switch and the display value of the pressure display instrument while regulating the pressure, the synchronism among the three actions of regulating the pressure, observing whether the pressure switch acts and observing the pressure value is ensured, and the problems that the pressure regulation is inconvenient, the action judgment basis of the pressure switch is inconvenient and intuitive and the like in the prior art are solved.
The embodiment of the invention discloses a specific pressure switch setting value detection device, and the embodiment further explains the technical scheme in the previous embodiment.
In this embodiment, the detection device may further include a pressure-increasing rate adjustment valve disposed at the pressure-increasing interface and a pressure-decreasing rate adjustment valve disposed at the pressure-decreasing interface.
The pressure boosting rate regulating valve can be used for regulating the air transmission rate when the pressure boosting interface transmits pressure air into the detection device; the pressure-reducing rate adjustment valve may be used to adjust the air discharge rate at which the pressure-reducing interface discharges the pressure air out of the interior of the detection device. Through the pressure increasing rate regulating valve and the pressure reducing rate regulating valve, technicians can conveniently regulate the pressure at the interface of the monitoring point.
In addition, the detection device may be provided with one switch operation indicator lamp, or may be provided with two switch operation indicator lamps.
Under the condition that the detection device is only provided with one switch action indicator lamp, when the boosting interface transmits the pressure air into the detection device, and before the pressure switch generates a boosting action signal, the working state of the switch action indicator lamp is an off state; when the pressure switch generates a boosting action signal, the working state of the switch action indicator lamp is a light-emitting state; when the pressure reducing interface extrudes the pressure air out of the detection device, and before the pressure switch generates a pressure reducing action signal, the working state of the switch action indicator lamp is a luminous state; when the pressure switch generates a voltage reduction action signal, the working state of the switch action indicator lamp is an off state.
When the detection device is provided with two switch action indicating lamps, the two switch action indicating lamps are respectively a voltage boosting action indicating lamp and a voltage reducing action indicating lamp, in this case, the voltage boosting action indicating lamp is used for acquiring a voltage boosting action signal, and when the voltage boosting action signal is acquired, the working state of the voltage boosting action indicating lamp is changed to prompt the outside to prompt that the pressure switch generates a voltage boosting action at the moment; the pressure reducing action indicator lamp is used for acquiring a pressure reducing action signal, and when the pressure reducing action signal is acquired, the working state of the pressure reducing action indicator lamp is changed to prompt the outside to generate a pressure reducing action of the pressure switch.
In order to further improve the synchronism among actions when a technician uses the detection device to detect the pressure setting value, in the embodiment, the switch action indicator lamp, the voltage boosting interface, the voltage reducing interface and the pressure detection interface are preferably arranged on the same side surface of the detection device, so that the technician can conveniently stand on the same side surface to adjust the pressure and observe whether the pressure switch acts and observe the pressure value on the pressure display instrument.
The embodiment of the invention also discloses a detection system for the setting value of the pressure switch, and the detection system comprises the detection device disclosed by the embodiment shown in figure 2; wherein,
the detection device 10 is used for detecting a pressure setting value corresponding to the pressure switch generating the boosting action or detecting a pressure setting value corresponding to the pressure switch generating the pressure reduction action;
the above-mentioned detection system further comprises:
the gas device 11 is used for transmitting pressure air to the detection device through the boosting interface;
and the pressure display instrument 12 is used for detecting and displaying the pressure value of the pressure at the monitoring point interface. Among them, the preferred pressure display instrument is a digital pressure display instrument.
In the present embodiment, the gas discharged through the depressurization interface may be directly discharged to the atmosphere, or may be discharged to a dedicated gas collection device.
In this embodiment, the switch operation indicator lamp on the detection device may be disposed on the dial plate of the pressure display instrument, so as to further improve the synchronism between the pressure adjustment and observation of the pressure switch and the observation of the pressure value.
The embodiment of the invention also discloses a system for adjusting the setting value of the pressure switch, and the system is shown in fig. 3 and comprises the detection system disclosed in the previous embodiment; further comprising:
and the setting value adjusting device 2 is used for adjusting the setting value of the pressure switch when the pressure setting value actually detected by the detection device in the detection system 1 is inconsistent with the rated pressure setting value of the pressure switch until the pressure setting value actually detected by the detection device is consistent with the rated pressure setting value.
Further, referring to fig. 4, the adjusting system in the present embodiment may further include a setting value judging device 3; the setting value judgment device 3 comprises a setting value judgment unit and a judgment result display unit; wherein,
the setting value judging unit is used for acquiring a pressure value detected by the pressure display instrument at the moment when the working state of a switch action indicator lamp of the detection device changes, determining the pressure value as an actual pressure setting value of the switch action, and judging whether the pressure setting value is consistent with a corresponding rated pressure setting value or not;
and the judgment result display unit is used for acquiring the judgment result of the setting value judgment unit and displaying the judgment result.
The setting value determining means stores a rated pressure setting value corresponding to a step-up operation and a rated pressure setting value corresponding to a step-down operation in advance. As can be seen from the above, the setting value judgment unit in the present embodiment may judge whether the actual pressure setting value and the rated pressure setting value are consistent, and display the judgment result through the judgment result display unit. Therefore, by using the setting value judgment device in the embodiment, a technician does not need to manually judge whether the actual pressure setting value is consistent with the rated pressure setting value, and only needs to observe the judgment result displayed by the judgment result display unit, so that the synchronism among actions in the pressure setting value detection process is further improved, and the detection precision is improved.
Further, referring to fig. 4, the adjusting system in this embodiment may further include a voice prompt device 4; wherein,
and the voice prompt device 4 is used for sending voice prompt information when the setting value judgment unit judges that the actual pressure setting value of the switch action is consistent with the corresponding rated pressure setting value. This means that a technician can judge whether the actual pressure setting value is consistent with the rated pressure setting value by listening to the voice prompt device with ears to send voice prompt information, so that the synchronism among actions in the pressure setting value detection process is further improved, and the detection precision is improved.
Finally, it should also be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The detection device, the system and the regulation system for the pressure switch setting value provided by the invention are described in detail, a specific example is applied in the text to explain the principle and the implementation mode of the invention, and the description of the above embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A detection device for a pressure switch setting value is characterized by comprising:
the monitoring point interface is used for being connected with a quick connector of the pressure switch so as to communicate with an air passage between the detection device and the pressure switch;
the switch action indicator light is connected with the pressure switch and used for acquiring a boosting action signal and a reducing action signal of the pressure switch; when the boosting action signal is acquired, the working state of the pressure switch is changed to prompt the outside to generate boosting action; when the pressure reduction action signal is acquired, the working state of the pressure reduction action signal is changed to prompt the outside that the pressure switch generates pressure reduction action;
the pressure boosting interface is used for transmitting pressure air into the detection device when a pressure setting value corresponding to the pressure boosting action of the pressure switch needs to be detected so as to increase the pressure at the monitoring point interface until the pressure switch generates the pressure boosting action signal;
the pressure reducing interface is used for discharging pressure air out of the interior of the detection device when a pressure setting value corresponding to the pressure reducing action of the pressure switch needs to be detected so as to reduce the pressure at the monitoring point interface until the pressure switch generates a pressure reducing action signal;
and the pressure detection interface is used for being connected with a pressure display instrument and displaying the pressure value of the pressure at the monitoring point interface in real time through the pressure display instrument.
2. The apparatus for detecting the setting value of the pressure switch according to claim 1, further comprising a voltage-increasing rate adjusting valve disposed at the voltage-increasing interface and a voltage-decreasing rate adjusting valve disposed at the voltage-decreasing interface;
and the boosting rate regulating valve is used for regulating the air transmission rate when the boosting interface transmits the pressure air into the detection device.
And the pressure reduction rate regulating valve is used for regulating the air discharge rate when the pressure reduction interface extrudes the pressure air out of the detection device.
3. The pressure switch setting detection device of claim 2, wherein said detection device comprises one of said switch actuation indicator lights;
when the boosting interface transmits the pressure air into the detection device and before the pressure switch generates the boosting action signal, the working state of the switch action indicator lamp is in an off state; when the pressure switch generates the boosting action signal, the working state of the switch action indicator lamp is a light-emitting state;
when the pressure reducing interface extrudes pressure air out of the detection device and before the pressure switch generates the pressure reducing action signal, the working state of the switch action indicator lamp is a luminous state; when the pressure switch generates the pressure reduction action signal, the working state of the switch action indicator lamp is an off state.
4. The pressure switch setting value detection device according to claim 2, wherein the switch operation indicator lamp in the detection device comprises a voltage-increasing operation indicator lamp and a voltage-decreasing operation indicator lamp;
the boosting action indicating lamp is used for acquiring the boosting action signal, and when the boosting action signal is acquired, the working state of the boosting action indicating lamp is changed to prompt the outside that the pressure switch generates boosting action;
the pressure reducing action indicator lamp is used for acquiring the pressure reducing action signal, and when the pressure reducing action signal is acquired, the working state of the pressure reducing action indicator lamp is changed to prompt the outside that the pressure switch generates the pressure reducing action.
5. The pressure switch setting value detection device according to any one of claims 1 to 4, wherein the switch operation indicator lamp, the voltage boost interface, the voltage reduction interface and the pressure detection interface are all disposed on the same side of the detection device.
6. A detection system of a pressure switch setting value, characterized by comprising a detection device according to any one of claims 1 to 5;
the detection device is used for detecting a pressure setting value corresponding to the pressure switch generating the boosting action or detecting a pressure setting value corresponding to the pressure switch generating the pressure reduction action;
the detection system further comprises:
the gas device is used for transmitting pressure air to the detection device through the boosting interface;
and the pressure display instrument is used for detecting and displaying the pressure value of the pressure at the monitoring point interface.
7. The system for detecting the setting value of the pressure switch according to claim 6, wherein the pressure display instrument is a digital pressure display instrument.
8. A regulation system of pressure switch settings, characterized in that it comprises a detection system according to claim 6 or 7; further comprising:
and the setting value adjusting device is used for adjusting the setting value of the pressure switch when the pressure setting value actually detected by the detection device in the detection system is inconsistent with the rated pressure setting value of the pressure switch until the pressure setting value actually detected by the detection device is consistent with the rated pressure setting value.
9. The system for adjusting the setting value of the pressure switch according to claim 8, further comprising a setting value judgment device; the setting value judgment device comprises a setting value judgment unit and a judgment result display unit;
the setting value judging unit is used for acquiring a pressure value detected by the pressure display instrument at the moment when the working state of a switch action indicator lamp of the detection device changes, determining the pressure value as an actual pressure setting value of the switch action, and judging whether the pressure setting value is consistent with a corresponding rated pressure setting value or not;
and the judgment result display unit is used for acquiring the judgment result of the setting value judgment unit and displaying the judgment result.
10. The system for adjusting the setting value of the pressure switch according to claim 9, further comprising a voice prompt device;
and the voice prompt device is used for sending voice prompt information when the setting value judgment unit judges that the actual pressure setting value of the switch action is consistent with the corresponding rated pressure setting value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454714.4A CN105157965A (en) | 2015-07-29 | 2015-07-29 | Device and system for detecting pressure switch setting value and regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454714.4A CN105157965A (en) | 2015-07-29 | 2015-07-29 | Device and system for detecting pressure switch setting value and regulating system |
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| CN105157965A true CN105157965A (en) | 2015-12-16 |
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| CN201510454714.4A Pending CN105157965A (en) | 2015-07-29 | 2015-07-29 | Device and system for detecting pressure switch setting value and regulating system |
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| CN109765046A (en) * | 2019-03-14 | 2019-05-17 | 克诺尔车辆设备(苏州)有限公司 | A kind of pressure switch detection device and method of calibration |
| CN112230135A (en) * | 2020-09-27 | 2021-01-15 | 北京康斯特仪表科技股份有限公司 | Detection method and detection system of multi-contact pressure switch |
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| JP2009002875A (en) * | 2007-06-25 | 2009-01-08 | Honda Motor Co Ltd | Calibration device of pressure sensor, and fuel cell system |
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| CN112230135A (en) * | 2020-09-27 | 2021-01-15 | 北京康斯特仪表科技股份有限公司 | Detection method and detection system of multi-contact pressure switch |
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Application publication date: 20151216 |
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| RJ01 | Rejection of invention patent application after publication |