Differential pressure sensor detection device

Abstract

The utility model provides a differential pressure sensor detection device. The device comprises a pressure source, a pressure controller and a signal processing module, the pressure source is used for being connected with first air inlet ports of a plurality of differential pressure sensors to be detected; the pressure controller is used for being connected with second air inlet ports of a plurality of differential pressure sensors to be detected; the signal processing module is used for being connected with signal output ports of a plurality of differential pressure sensors to be detected. The detection accuracy and the detection efficiency of the differential pressure sensor can be improved, and the purposes of saving time and labor and being high in automation degree are achieved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of equipment detection, and in particular to a pressure difference sensor detection device. Background Art

[0002] The differential pressure sensor is mainly used in the engine exhaust gas recirculation (EGR) and particulate filter (GPF) system. Its performance has an important impact on the overall performance and environmental friendliness of the engine.

[0003] The existing differential pressure sensor detection methods have problems such as poor accuracy, low efficiency, time-consuming and labor-intensive, and low degree of automation. As the requirements for sensor performance testing gradually increase, the existing detection equipment and methods cannot meet the detection requirements. Utility Model Content

[0004] In view of this, the present disclosure proposes a pressure difference sensor detection device to solve the problems of poor accuracy, low efficiency, time-consuming and labor-intensive, and low automation in existing pressure difference sensor detection methods.

[0005] The first aspect of the present disclosure proposes a pressure differential sensor detection device, which includes a pressure source, a pressure controller and a signal processing module; the pressure source is used to connect to the first air inlet port of multiple pressure differential sensors to be detected; the pressure controller is used to connect to the second air inlet port of the multiple pressure differential sensors to be detected; and the signal processing module is used to connect to the signal output ports of the multiple pressure differential sensors to be detected respectively.

[0006] In an embodiment of the present disclosure, the device includes a detection tool; the upper surface of the mounting surface of the detection tool is used to mount the multiple pressure differential sensors to be detected; the mounting surface is provided with multiple groups of openings, and the multiple groups of openings correspond one-to-one to the multiple pressure differential sensors to be detected; wherein the first opening in each group of openings corresponds to the first air inlet port of the corresponding pressure differential sensor to be detected, and the second opening in each group of openings corresponds to the second air inlet port of the corresponding pressure differential sensor to be detected.

[0007] In the embodiment of the present disclosure, a first air intake duct and a second air intake duct are arranged below the mounting surface; one end of the first air intake duct is connected to the first air intake port of the corresponding pressure differential sensor to be detected through the corresponding first opening; one end of the second air intake duct is connected to the second air intake port of the corresponding pressure differential sensor to be detected through the corresponding second opening.

[0008] In the embodiment of the present disclosure, a third opening and a fourth opening are provided on the side of the detection tooling; the other end of the first air intake pipe is connected to the pressure source through the third opening, and the other end of the second air intake pipe is connected to the pressure controller through the fourth opening.

[0009] In the embodiment of the present disclosure, the detection tooling further includes a pressing plate; a fixed space is formed between the pressing plate and the upper surface of the mounting surface; and the fixed space is used to fix the multiple differential pressure sensors to be detected.

[0010] In the embodiment of the present disclosure, the pressure plate is provided with a plurality of fifth openings, and the mounting surface is provided with a plurality of sixth openings; the plurality of fifth openings correspond one-to-one to the plurality of sixth openings; wherein each fifth opening is connected to the corresponding sixth opening by bolts.

[0011] In the embodiment of the present disclosure, the signal processing module is connected to the signal output ports of the multiple pressure difference sensors to be detected through multiple signal transmission channels; the multiple signal transmission channels correspond one-to-one to the multiple pressure difference sensors to be detected.

[0012] In an embodiment of the present disclosure, the signal processing module includes a signal conversion unit and a signal acquisition unit connected to the signal conversion unit; the signal conversion unit is used to convert the pressure signal transmitted by the signal transmission channel into a voltage signal; the signal acquisition module is used to collect and store the voltage signal.

[0013] In the embodiment of the present disclosure, the signal acquisition module includes a signal acquisition switch, a circuit board, a power supply and multiple wiring harnesses; the signal acquisition switch and the power supply are respectively connected to the circuit board; the circuit board is provided with a communication interface, and the communication interface is connected to the computer port via a data cable; the multiple wiring harnesses are connected to the multiple pressure difference sensors to be detected via the multiple signal transmission channels.

[0014] In an embodiment of the present disclosure, the pressure controller includes a pressure pump and a pressure module connected to the pressure pump; the pressure module is used to control the output pressure of the pressure pump to be a preset pressure.

[0015] Compared with the prior art, the utility model has the following technical effects:

[0016] 1. It can complete the detection of multiple differential pressure sensors at the same time, automatically collect data and generate records, greatly improving work efficiency.

[0017] 2. It can automatically increase or decrease the voltage during the detection process, automatically adjust the voltage at the detection point, and automatically generate records, eliminating human errors and reducing the labor intensity of operators.

[0018] 3. It has the advantages of high detection accuracy, good stability and high degree of automation, can meet production requirements, and can provide reliability guarantee for abnormal data analysis and detection result judgment.

[0019] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will become apparent from the following description or be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present disclosure. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0021] In the attached picture:

[0022] Figure 1 A schematic structural diagram of a detection device for a single differential pressure sensor provided by an embodiment of the present disclosure is shown;

[0023] Figure 2 A schematic structural diagram of a pressure difference sensor detection device provided by an embodiment of the present disclosure is shown;

[0024] Figure 3 A schematic structural diagram of another pressure difference sensor detection device provided by an embodiment of the present disclosure is shown;

[0025] Figure 4 A schematic structural diagram of a multi-channel differential pressure sensor detection system provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0026] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0027] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present disclosure should have the common meanings understood by those skilled in the art to which the present disclosure belongs.

[0028] The following describes the technical scenarios involved in the embodiments of the present disclosure.

[0029] like Figure 1As shown, in the related technology, when testing the differential pressure sensor, one end of the pressure end of the sensor is connected to the pressure source, and the other end is connected to a pressure pump with a digital precision pressure gauge. The pressure source is controlled to output the standard pressure and the pressure pump is adjusted to ensure the zero pressure, and the pressure value of each detection point is detected; the signal end of the differential pressure sensor is connected to a 5V regulated power supply and a multimeter, and the voltage signal value corresponding to the pressure value of each detection point is obtained on the multimeter, and the data is manually recorded. This detection method has the following technical problems:

[0030] 1. Low accuracy: The zero pressure of the differential pressure sensor connected to the pressure pump needs to be adjusted manually. The zero pressure is unstable and prone to numerical drift, resulting in poor accuracy and stability of the test results.

[0031] 2. Low efficiency: Only one differential pressure sensor can be tested at a time, which has low work efficiency and cannot ensure that a large number of differential pressure sensors can be tested in time.

[0032] 3. Time-consuming and labor-intensive: The differential pressure sensor is difficult to connect and has poor sealing during installation. Data must be recorded manually and test reports must be issued manually, which requires a lot of work.

[0033] 4. Low degree of automation: many testing devices, low integration, manual data recording and output reports.

[0034] In view of this, the present application proposes a differential pressure sensor detection device that supports simultaneous detection of multiple differential pressure sensors and supports automatic pressure increase and decrease, etc., which not only has a high degree of automation but also has high detection accuracy.

[0035] The implementation of the pressure difference sensor detection device of the present application is described below with reference to examples.

[0036] In this embodiment, a pressure difference sensor detection device is provided. Figure 2 is a structural diagram of a pressure difference sensor detection device according to an embodiment of the present disclosure, such as Figure 2 As shown, the device includes: a pressure source 101, a pressure controller 102 and a signal processing module 103;

[0037] The pressure source 101 is used to connect to the first air inlet port of multiple pressure differential sensors 104 to be detected; the pressure controller 102 is used to connect to the second air inlet port of the multiple pressure differential sensors 104 to be detected; the signal processing module 103 is used to connect to the signal output ports of the multiple pressure differential sensors 104 to be detected respectively.

[0038] In the embodiment of the present disclosure, the pressure source 101 is used to input the pressure required for the detection process to the first air inlet port of the pressure differential sensor 104 to be detected. The pressure controller 102 is used to ensure the zero point stability of the pressure differential sensor 104 to be detected. The first air inlet port of the pressure differential sensor 104 to be detected can be understood as the air inlet pressure end, and the second air inlet port can be understood as the port to the atmosphere. The signal processing module 103 is used to receive the pressure signal output by each pressure differential sensor 104 to be detected, and convert its pressure signal into an electrical signal for recording and storage.

[0039] In some embodiments, the pressure controller 102 includes a pressure pump and a pressure module connected to the pressure pump, and the pressure module is used to control the output pressure of the pressure pump to be a preset pressure; wherein the preset pressure can be set according to actual conditions and is not specifically limited here.

[0040] The disclosed embodiment can ensure the zero-point stability of the differential pressure sensor by controlling the output pressure of the pressure pump. The zero-point stability refers to whether the electrical signal or digital value output by the sensor can remain stable under the condition of zero pressure difference (i.e., when the pressures on both sides are equal). In other words, when the pressures on both sides measured by the differential pressure sensor are equal, the sensor should output a fixed, pre-set zero-point value, and should not drift or fluctuate.

[0041] In some embodiments, Figure 3 As shown, the device comprises a detection tool 105. The upper surface of the mounting surface 1051 of the detection tool 105 is used to mount the plurality of differential pressure sensors 104 to be detected.

[0042] The mounting surface 1051 is provided with a plurality of groups of openings 1052, and the plurality of groups of openings correspond one-to-one to the plurality of differential pressure sensors 104 to be detected; wherein the first opening in each group of openings corresponds to the first air inlet port of the corresponding differential pressure sensor 104 to be detected, and the second opening in each group of openings corresponds to the second air inlet port of the corresponding differential pressure sensor 104 to be detected, for example Figure 3 The correspondence between the two air inlet ports in the differential pressure sensor "104" to be detected and the two openings of the corresponding group "1052".

[0043] In the disclosed embodiment, the size of the detection tool 105 is 2000mmx400mmx400mm, and the mounting surface 1051 of the detection tool 105 can be evenly drilled according to the size of the two air inlet ports of the multiple pressure differential sensors 104 to be detected, so as to obtain multiple groups of openings 1052. Among them, the aperture of the first air inlet port of the pressure differential sensor, that is, the air inlet pressure port, is 90mm; the aperture of the second air inlet port of the pressure differential sensor, that is, the atmospheric port, is 70mm, the center distance between the two apertures is 200mm, the depth is 230mm, and the interval is 300mm, which is one group, and multiple groups are set. Each opening on the mounting surface is provided with a sealing rubber ring to prevent air leakage in the pipeline, which causes the low accuracy of the detection result.

[0044] In some embodiments, Figure 3 As shown: a first air intake duct 1053 and a second air intake duct 1054 are provided below the mounting surface 1051;

[0045] One end of the first air intake pipe 1053 is connected to the first air intake port of the corresponding pressure difference sensor 104 to be detected through the corresponding first opening; one end of the second air intake pipe 1054 is connected to the second air intake port of the corresponding pressure difference sensor 104 to be detected through the corresponding second opening.

[0046] In the embodiment of the present disclosure, the apertures of the first air intake duct 1053 and the second air intake duct 1054 may both be 100 mm, the center distance between the two apertures is 200 mm, and the height of the centers of the two apertures from the mounting surface 1051 is 230 mm.

[0047] In some embodiments, Figure 3 As shown, a third opening 1055 and a fourth opening 1056 are provided on the side of the detection tooling 105; the other end of the first air intake pipe 1053 is connected to the pressure source 101 through the third opening 1055, and the other end of the second air intake pipe 1054 is connected to the pressure controller 102 through the fourth opening 1056.

[0048] In the embodiment of the present disclosure, multiple pressure differential sensors 104 to be detected and the pressure source 101 are connected through the two ends of the first air intake pipe 1053, and multiple pressure differential sensors 104 to be detected and the pressure controller 102 are connected through the two ends of the second air intake pipe 1054, so that the air intake ports of the pressure differential sensors can be interconnected, and the airway ports are connected with quick-plug connectors, one of which is connected to the pressure source to realize standard pressure entering the airway, and the other is connected to the intelligent pressure controller to realize automatic and accurate control of the zero-point pressure in the airway.

[0049] In some embodiments, the detection tool further includes a pressing plate; a fixed space is formed between the pressing plate and the upper surface of the mounting surface; and the fixed space is used to fix the multiple differential pressure sensors 104 to be detected.

[0050] In some embodiments, the pressure plate is provided with a plurality of fifth openings, and the mounting surface is provided with a plurality of sixth openings; the plurality of fifth openings correspond one-to-one to the plurality of sixth openings; wherein each fifth opening is connected to the corresponding sixth opening by bolts.

[0051] In the disclosed embodiment, the pressure plate may be a V-shaped pressure plate, which is used to press the differential pressure sensor. Both ends of the pressure plate have openings corresponding to the mounting surface of the differential pressure sensor, and are fast and firmly pressed together through bolt connections.

[0052] In some embodiments, the signal processing module 103 is connected to the signal output ports of the plurality of pressure difference sensors 104 to be detected through a plurality of signal transmission channels; the plurality of signal transmission channels correspond one to one with the plurality of pressure difference sensors 104 to be detected.

[0053] In the embodiment of the present disclosure, each pressure differential sensor 104 to be detected can transmit a pressure signal to the signal processing module 103 through a corresponding signal transmission channel. The signal processing module 103 can receive pressure signals output from multiple pressure differential sensors 104 to be detected through multiple signal transmission channels.

[0054] In some embodiments, the signal processing module 103 includes a signal conversion unit and a signal acquisition unit connected to the signal conversion unit; the signal conversion unit is used to convert the pressure signal transmitted by the signal transmission channel into a voltage signal; the signal acquisition module is used to collect and store the voltage signal.

[0055] In some embodiments, the signal acquisition module includes a signal acquisition switch, a circuit board, a power supply and multiple wiring harnesses; the signal acquisition switch and the power supply are respectively connected to the circuit board; the circuit board is provided with a communication interface, and the communication interface is connected to the computer port via a data cable; the multiple wiring harnesses are connected to the multiple pressure difference sensors 104 to be detected through the multiple signal transmission channels.

[0056] In the disclosed embodiment, the signal acquisition module is mainly composed of a wiring harness, a high-precision circuit board, an integrated box, and a 5V stable power supply; the signal acquisition switch and the 5V power supply are connected to the high-precision circuit board, and the high-precision circuit board is provided with a communication interface, which is connected to the computer port through a data cable. The connection with the pressure difference sensor to be tested is achieved through the wiring harness. When the pressure source automatic control device outputs the standard pressure value, the signal acquisition system can realize the conversion of the pressure signal into a voltage signal. Through the voltage measurement software system, the measurement value is automatically collected and the record is automatically generated.

[0057] The embodiments of the present disclosure have the following technical effects:

[0058] 1. It can complete the detection of multiple differential pressure sensors at the same time, automatically collect data and generate records, greatly improving work efficiency.

[0059] 2. The detection process automatically increases and decreases the voltage, the detection point automatically adjusts the voltage, and automatically generates records, eliminating human errors and reducing the labor intensity of operators.

[0060] 3. It has high detection accuracy, good stability and high degree of automation, can meet production requirements, and can provide reliability guarantee for abnormal data analysis and detection result judgment.

[0061] Corresponding to the implementation of the above differential pressure sensor detection device, the embodiment of the present disclosure also provides a multi-channel differential pressure sensor detection system, such as Figure 4 As shown, the multi-channel differential pressure sensor detection system includes an intelligent pressure controller, a multi-channel differential pressure sensor detection tooling, a signal acquisition module, and a software automatic acquisition system. The intelligent pressure controller is equipped with a pressure module, which can automatically adjust the pressure pump to ensure zero point stability. The specific structure of the differential pressure sensor detection tooling: the appearance size is 2000mmx400mmx400mm, and the differential pressure sensor installation surface of the detection tooling is drilled evenly according to the size of the differential pressure sensor inlet port. The aperture of the differential pressure sensor inlet pressure end is 90mm, the aperture of the atmospheric end is 70mm, the center distance between the two is 200mm, the depth is 230mm, and the interval is 300mm for 1 group. There are 6 groups in total, and the countersunk holes are placed with sealing rubber rings; the detection tooling is provided with a V-shaped pressure plate, which is used to press the differential pressure sensor. The two ends of the pressure plate are corresponding to the differential pressure sensor installation surface. Holes are opened, and fast and firm press-fitting is achieved through bolt connection. Two independent airways are opened on the side of the differential pressure sensor detection tooling, with an aperture of 100mm and a center distance of 200mm. The center of the aperture is 230mm from the installation surface of the differential pressure sensor, which enables intercommunication with the air inlet port of the differential pressure sensor. The airway port is connected with a quick-plug connector. One is connected to the pressure source to achieve standard pressure entering the airway, and the other is connected to the intelligent pressure controller to achieve automatic and accurate control of the zero-point pressure in the airway. The signal acquisition module is mainly composed of a wiring harness, a high-precision circuit board, an integrated box, and a 5V stable power supply. The signal acquisition switch and the 5V power supply are connected to the high-precision circuit board. The high-precision circuit board is provided with a communication interface and connected to the computer port through a data cable. The connection with the differential pressure sensor to be tested is achieved through the wiring harness. When the pressure source automatic control device outputs the standard pressure value, the signal acquisition system can realize the conversion of the pressure signal into a voltage signal. The voltage measurement software system is used to realize automatic acquisition of measurement values ​​and automatic generation of records.

[0062] The specific method of using the multi-channel differential pressure sensor detection system provided by the utility model is as follows: 1. Connecting the pressure source and the intelligent pressure controller to the air inlet port of the multi-channel differential pressure sensor detection tooling through pipelines; 2. Installing the differential pressure sensor to the multi-channel differential pressure sensor detection tooling; 3. Using a multi-channel wiring harness to respectively connect the two ends to the corresponding channels of the differential pressure sensor and the signal acquisition module; 4. Connecting the port of the signal acquisition module to the computer software system through a data cable; 5. Performing performance testing of the differential pressure sensor, according to the testing requirements, by controlling the pressure source to output standard pressure and automatically adjusting the pressure pump to ensure zero point stability to each testing point, the high-precision signal acquisition module converts the pressure signal into a voltage signal, and automatically collects data and automatically generates records through the software system.

[0063] It should be noted that:

[0064] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present disclosure can be practiced without these specific details. In some instances, well-known structures and technologies are not shown in detail so as not to obscure the understanding of this description.

[0065] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various utility model aspects, in the above description of the exemplary embodiments of the present disclosure, the various features of the present disclosure are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed method should not be interpreted as reflecting the following schematic diagram: the claimed disclosure requires more features than the features explicitly recited in each claim. More specifically, as reflected in the claims below, the utility model aspects lie in less than all the features of the single embodiment disclosed above. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present disclosure.

[0066] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of this disclosure and form different embodiments. For example, in the claims below, any one of the claimed embodiments may be used in any combination.

[0067] The above is only a preferred specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A differential pressure sensor detection device, characterized in that: The device includes a pressure source, a pressure controller and a signal processing module; The pressure source is used to be connected to the first air inlet ports of a plurality of pressure difference sensors to be detected; The pressure controller is used to be connected to the second air inlet ports of the plurality of pressure difference sensors to be detected; The signal processing module is used to be connected to the signal output ports of the multiple pressure difference sensors to be detected respectively.

2. The pressure difference sensor detection device according to claim 1, characterized in that: The device includes a detection tool; The upper surface of the mounting surface of the detection tool is used to mount the plurality of pressure difference sensors to be detected; The mounting surface is provided with a plurality of groups of openings, and the plurality of groups of openings correspond one-to-one to the plurality of pressure differential sensors to be detected; wherein the first opening in each group of openings corresponds to the first air inlet port of the corresponding pressure differential sensor to be detected, and the second opening in each group of openings corresponds to the second air inlet port of the corresponding pressure differential sensor to be detected.

3. The pressure difference sensor detection device according to claim 2, characterized in that: A first air intake duct and a second air intake duct are arranged below the mounting surface; One end of the first air intake pipe is connected to the first air intake port of the corresponding pressure differential sensor to be detected through the corresponding first opening; one end of the second air intake pipe is connected to the second air intake port of the corresponding pressure differential sensor to be detected through the corresponding second opening.

4. The pressure difference sensor detection device according to claim 3, characterized in that: The side of the detection tool is provided with a third opening and a fourth opening; The other end of the first air intake pipeline is connected to the pressure source through the third opening, and the other end of the second air intake pipeline is connected to the pressure controller through the fourth opening.

5. The pressure difference sensor detection device according to claim 2 or 3, characterized in that: The detection tooling also includes a pressing plate; A fixed space is formed between the pressure plate and the upper surface of the mounting surface; the fixed space is used to fix the multiple differential pressure sensors to be detected.

6. The pressure difference sensor detection device according to claim 5, characterized in that: The pressing plate is provided with a plurality of fifth openings, and the mounting surface is provided with a plurality of sixth openings; the plurality of fifth openings correspond one to one with the plurality of sixth openings; Wherein, each fifth opening is connected to the corresponding sixth opening by bolts.

7. The pressure difference sensor detection device according to claim 1 or 2, characterized in that: The signal processing module is connected to the signal output ports of the plurality of pressure difference sensors to be detected through a plurality of signal transmission channels; the plurality of signal transmission channels correspond one to one to the plurality of pressure difference sensors to be detected.

8. The pressure difference sensor detection device according to claim 7, characterized in that: The signal processing module includes a signal conversion unit and a signal acquisition unit connected to the signal conversion unit; The signal conversion unit is used to convert the pressure signal transmitted by the signal transmission channel into a voltage signal; The signal acquisition unit is used to acquire and store the voltage signal.

9. The pressure difference sensor detection device according to claim 8, characterized in that: The signal acquisition unit includes a signal acquisition switch, a circuit board, a power supply and a plurality of wiring harnesses; The signal acquisition switch and the power supply are connected to the circuit board respectively; the circuit board is provided with a communication interface, and the communication interface is connected to the computer port through a data line; the multiple wiring harnesses are connected to the multiple pressure difference sensors to be detected through the multiple signal transmission channels.

10. The differential pressure sensor detection device according to claim 1 or 2, characterized in that: The pressure controller includes a pressure pump and a pressure module connected to the pressure pump; the pressure module is used to control the output pressure of the pressure pump to be a preset pressure.

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