Low-cost wheel cylinder pressure sensor testing device

Abstract

The utility model discloses a low-cost wheel cylinder pressure sensor testing device, and belongs to the technical field of pressure sensor testing devices. Comprising a straight cylinder shell, a connecting cylinder is fixedly arranged at the top of the straight cylinder shell, an upper through hole is formed in the top of the connecting cylinder, a lower through hole is formed in the tail of the straight cylinder shell, and a lower through hole inserting plate attached to the interior of the straight cylinder shell is embedded in the lower through hole. According to the utility model, the pressure sensor is arranged in the current hydraulic loop like a T shape by designing the kit with the three-way structure, and the power line and the signal line are connected to the sensor through the sleeve holes, so that the real-time monitoring of the pressure is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensor testing devices, in particular to a low-cost wheel cylinder pressure sensor testing device. Background Art

[0002] A pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to certain rules. Pressure sensors are usually composed of pressure sensitive elements and signal processing units. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. Pressure sensors are the most commonly used sensors in industrial practice. They are widely used in various industrial automatic control environments, involving many industries such as water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemicals, oil wells, electricity, ships, machine tools, pipelines, etc.

[0003] In the field of automotive engineering, the background of pressure sensor test fixtures can be traced back to the growing application and demand for pressure sensors. Pressure sensors are sensor devices widely used in industrial manufacturing, automotive engineering, aerospace, energy and other fields. Their role is to measure and monitor pressure changes. Especially in the automotive braking system, pressure sensors play a vital role because they directly affect braking performance and safety.

[0004] When conducting a brake performance calibration experiment, the pressure performance on the four wheels directly determines the performance of ESC / ABS / ONEBOX products. Normally, the pressure collection in the circuit mainly relies on hydraulic sensors. The working principle of the hydraulic sensor is to directly act on the diaphragm of the sensor through the medium pressure, resulting in a small displacement, thereby changing the resistance value of the sensor. The electronic circuit detects this change and converts and outputs a standard signal corresponding to the pressure. When the liquid medium flows through the integrated sensor, the fluid pressure acts on the stainless steel installed on the sensor housing, and then is transmitted to the diffused silicon diaphragm through the sealing silicone oil, while the pressure at the reference end acts on the other side of the diaphragm. This design causes a pressure difference on both sides of the diaphragm, thereby forming a stress, causing one side of the diaphragm to be compressed and the other side to be pulled, thereby placing a pair of strain gauges in the compression zone and the other pair of strain gauges in the tension zone. The two pairs of strain gauges are connected into a full dynamic bridge to increase the output signal. When the pressure changes, the resistance of the bridge arm changes accordingly, which in turn causes a change in the output voltage. After being amplified and converted by the differential amplifier, it is finally converted into a corresponding current signal, generating a standard output signal of DC 4~20mA with an approximately linear relationship. Utility Model Content

[0005] The purpose of the utility model is to provide a low-cost wheel cylinder pressure sensor test device, which solves the problem of obtaining the pressure of four wheel cylinders in real time in the hydraulic circuit when calibrating the performance parameters of the vehicle brake-by-wire calibration experiment.

[0006] To achieve the above-mentioned purpose, the utility model provides a low-cost wheel cylinder pressure sensor testing device, including a straight cylinder shell, a connecting cylinder body is fixedly arranged on the top of the straight cylinder shell, an upper through hole is opened on the top of the connecting cylinder body, and a lower through hole is opened at the tail of the straight cylinder shell, and a lower through hole plug plate is embedded in the lower through hole and fits with the interior of the straight cylinder shell.

[0007] Preferably, the connecting cylinder is a truncated cone-shaped hollow structure.

[0008] Preferably, the extended lines of the midpoints of the two oblique sides of the inner wall of the connecting cylinder intersect and form an angle of 90°.

[0009] Preferably, the inner diameter and outer diameter of the straight cylindrical shell are both larger than the inner diameter and outer diameter of the upper through hole.

[0010] Preferably, the inner diameter and outer diameter of the straight cylindrical shell are the same as the inner diameter and outer diameter of the lower through hole.

[0011] Preferably, the lower through hole plug plate is a concave plug plate structure.

[0012] Preferably, the inner diameter of the lower through-hole plug plate is the same as the inner diameter of the straight-cylindrical shell.

[0013] Preferably, the inner diameter of the tail portion of the connecting cylinder is the same as the inner diameter of the straight cylinder shell.

[0014] Preferably, the inner diameter of the top of the connecting cylinder is the same as the inner diameter of the upper through hole.

[0015] Therefore, the utility model adopts a low-cost wheel cylinder pressure sensor testing device with the above structure, which has the following beneficial effects:

[0016] The utility model designs a three-way structure kit so that the pressure sensor is installed in the current hydraulic circuit like a T shape, and the power line and the signal line are connected to the sensor through the sleeve hole to realize real-time monitoring of the pressure.

[0017] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a low-cost wheel cylinder pressure sensor testing device of the utility model;

[0019] Figure 2This is a schematic diagram of the internal structure of a low-cost wheel cylinder pressure sensor testing device of the utility model;

[0020] Reference numerals

[0021] 1. Straight cylinder shell, 2. Connecting cylinder, 3. Upper through hole, 4. Lower through hole, 5. Lower through hole plug plate. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0023] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] Example

[0025] like Figure 1-2 As shown, the utility model provides a low-cost wheel cylinder pressure sensor testing device, including a straight cylinder shell 1, a connecting cylinder 2 is fixedly arranged on the top of the straight cylinder shell 1, an upper through hole 3 is opened on the top of the connecting cylinder 2, and a lower through hole 4 is opened at the tail of the straight cylinder shell 1. The lower through hole 4 is embedded with a lower through hole plug plate 5 that fits with the interior of the straight cylinder shell 1.

[0026] The connecting cylinder 2 is a truncated cone-shaped hollow structure.

[0027] The extended lines of the midpoints of the two oblique sides of the inner wall of the connecting cylinder 2 intersect and form an angle of 90°.

[0028] The inner diameter and outer diameter of the straight cylindrical housing 1 are both larger than the inner diameter and outer diameter of the upper through hole 3 .

[0029] The inner diameter and outer diameter of the straight cylindrical housing 1 are the same as the inner diameter and outer diameter of the lower through hole 4 .

[0030] The lower through hole plug board 5 is a concave plug board structure.

[0031] The inner diameter of the lower through-hole plug plate 5 is the same as the inner diameter of the straight-cylindrical housing 1 .

[0032] The inner diameter of the tail portion of the connecting cylinder 2 is the same as the inner diameter of the straight cylinder housing 1 .

[0033] The inner diameter of the top of the connecting cylinder 2 is the same as the inner diameter of the upper through hole 3 .

[0034] Working principle: The functions of each component are described as follows:

[0035] Shell: The shell includes a straight shell 1 and a connecting cylinder 2. The shell of the test fixture is used to fix and protect the pressure sensor. It fixes the power line and signal line of the sensor and prevents the brake fluid from splashing and causing a short circuit inside the sensor. This ensures the safety and stability of the sensor.

[0036] Fixing bolts: The pressure sensor is connected to the test fixture through fixing bolts. The bolts are connected to the oil pipe circuit and allow the brake fluid to flow to the pressure sensor collection point through the internal through hole. This ensures that the hydraulic pressure can be smoothly transmitted to the pressure sensor and the pressure is converted into a voltage signal and transmitted to the collection device.

[0037] Three-way module: The three-way module connects the oil pipe, pressure sensor and the hose at the wheel cylinder. The brake fluid flows to the pressure sensor through the three-way module and then connects to the hose at the wheel cylinder to form a complete system, realizing accurate collection of the pressure at the wheel cylinder.

[0038] Therefore, the utility model adopts the above-mentioned low-cost wheel cylinder pressure sensor testing device, and designs a three-way structure kit so that the pressure sensor is installed in the current hydraulic circuit like a T shape, and the power line and signal line are connected to the sensor through the sleeve hole to realize real-time monitoring of the pressure.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. A low-cost wheel cylinder pressure sensor test device, characterized in that: It comprises a straight-cylindrical shell, a connecting cylinder is fixedly arranged on the top of the straight-cylindrical shell, an upper through hole is opened on the top of the connecting cylinder, a lower through hole is opened on the tail of the straight-cylindrical shell, and a lower through hole plug plate which fits the inside of the straight-cylindrical shell is embedded in the lower through hole.

2. A low-cost wheel cylinder pressure sensor testing device according to claim 1, characterized in that: The connecting cylinder is a truncated cone-shaped hollow structure.

3. A low-cost wheel cylinder pressure sensor testing device according to claim 1, characterized in that: The extended lines of the midpoints of the two oblique sides of the inner wall of the connecting cylinder intersect and form an angle of 90°.

4. A low-cost wheel cylinder pressure sensor testing device according to claim 1, characterized in that: The inner diameter and outer diameter of the straight cylindrical shell are both larger than the inner diameter and outer diameter of the upper through hole.

5. A low-cost wheel cylinder pressure sensor testing device according to claim 1, characterized in that: The inner diameter and outer diameter of the straight cylindrical shell are the same as the inner diameter and outer diameter of the lower through hole.

6. A low-cost wheel cylinder pressure sensor testing device according to claim 5, characterized in that: The lower through hole plug plate is a concave plug plate structure.

7. A low-cost wheel cylinder pressure sensor testing device according to claim 6, characterized in that: The inner diameter of the lower through hole plug plate is the same as the inner diameter of the straight cylinder housing.

8. A low-cost wheel cylinder pressure sensor testing device according to claim 7, characterized in that: The inner diameter of the tail portion of the connecting cylinder is the same as the inner diameter of the straight cylinder shell.

9. A low-cost wheel cylinder pressure sensor testing device according to claim 8, characterized in that: The inner diameter of the top of the connecting cylinder is the same as the inner diameter of the upper through hole.

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