CN213517194U - Acceleration sensor detection device based on comparison - Google Patents
Acceleration sensor detection device based on comparison Download PDFInfo
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- CN213517194U CN213517194U CN202022879376.8U CN202022879376U CN213517194U CN 213517194 U CN213517194 U CN 213517194U CN 202022879376 U CN202022879376 U CN 202022879376U CN 213517194 U CN213517194 U CN 213517194U
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Abstract
The utility model provides an acceleration sensor detection device based on comparison, which comprises a sensor fixing module, an impact force generation module and an acquisition module; the sensor fixing module is a supporting block vertically arranged on the test platform, and the top of the sensor fixing module is provided with two sensor mounting holes which are bilaterally symmetrical along the center; the impact force generation module comprises an electromagnet and a telescopic impact block; the acquisition module is used for acquiring and confirming parameters of the normal acceleration sensor and the acceleration sensor to be detected. The detection device of the utility model confirms whether the sensor to be detected is normal or not through a comparison mode; compared with the impact output instrument and instrument adopting the calibrated acceleration, speed and force in the prior art, the precision and accuracy of the output impact parameters do not need to be controlled deliberately, the detection cost is greatly saved, and the complicated maintenance is avoided.
Description
Technical Field
The utility model belongs to the technical field of the sensor detects and specifically relates to an acceleration sensor detection device based on contrast is related to.
Background
In the automobile crash test, in order to test the acceleration of the crash, an acceleration sensor and a current clamp sensor are arranged at a plurality of key positions of a vehicle body, and the sensors are multiplexed, so that damage can occur in the using process, and the damage is generally the following conditions: 1. the signal line is disconnected or short-circuited. 2. The exciting power line is disconnected or short-circuited, 3, the chip of the sensor is damaged, and although an output response can be obtained, a serious noise signal exists. 4. The sensor chip is damaged, and the output is deviated under the impact force of a certain interval. Data acquisition of a crash test cannot be acquired or is seriously distorted due to damage of the acceleration sensors, and the test result is greatly influenced, so that the acceleration sensors need to be detected and calibrated before the acceleration sensors are installed and fixed in order to ensure that each acceleration sensor is in a good state. These tests and calibrations are currently performed in several ways, all by docking data acquisition equipment, observing the output of the sensor by tapping or the like. The method can occupy the resources of data acquisition equipment, and can measure 1 and 2 fault sensors but not 3 and 4 fault sensors, and secondly, a universal meter is used for measuring the input and output impedance. This method can only evaluate the fault conditions of items 1 and 2 above. Thirdly, the sensor is fixed on a special calibration table for calibration test, and the method is very complicated and time-consuming.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can detect out whether normal work's of the sensor that awaits measuring acceleration sensor detection device dismantled based on the contrast fast.
In order to solve the technical problem, the utility model provides an acceleration sensor detection device based on comparison, which is characterized in that the acceleration sensor detection device comprises a sensor fixing module, an impact force generation module and an acquisition module;
the sensor fixing module is a supporting block vertically arranged on the test platform, the area of the upper surface of the supporting block is larger than that of the lower surface of the supporting block, and the impact bearing surface is a vertical plane; the top of the supporting block is provided with two sensor mounting holes which are bilaterally symmetrical along the center;
the impact force generation module comprises an electromagnet and a telescopic impact block, the electromagnet is installed on the test platform, and the telescopic impact block is over against a vertical central line of an impact bearing surface of the sensor fixing module;
the acquisition module is respectively connected with the two acceleration sensors and the impact force generation module and is used for controlling the impact force generation module to generate impact and acquiring output parameters of the two acceleration sensors;
one of the two acceleration sensors is an acceleration sensor for confirming normal, and the other is an acceleration sensor to be detected.
Furthermore, the acquisition module comprises a sensor resistance measurement unit which is simultaneously connected with the two acceleration sensors to form four output impedances;
the sensor resistance measuring unit comprises a digital matrix switching circuit and a resistance collector, and the resistance collector collects the four output impedances through a digital matrix switching circuit switching channel.
Further, the support blocks are divided by height into an upper section, a middle section and a lower section, the lower section is from the lower surface of the support block to the height of the support block 1/3, the middle section is from the height of the support block 1/3 to the height of the support block 2/3, and the upper section is from the height of the support block 2/3 to the upper surface of the support block;
the cross section of the lower section is a rectangle same as the lower surface; the cross section of the middle section is a rectangle which has the same thickness as the cross section of the lower section and the width of the left side and the right side extends outwards; the cross section of the upper section is a rectangle which has the same width as that of the cross section of the middle section and the thickness extending to the side which does not bear impact.
Further, the telescopic ram is directly opposite the center point at the height of the support block 2/3.
Furthermore, the sensor mounting hole is convex and comprises a main body part and wing parts on two sides, and the wing parts are arranged close to the impact bearing surface; the acceleration sensor is arranged in the sensor mounting hole through a hoop.
Furthermore, the acquisition module comprises a processing unit and a controller unit;
the processing unit is respectively connected with the sensor resistance measuring units and is used for acquiring parameters acquired by the sensor resistance measuring units, generating waveforms of the two acceleration sensors and analyzing the deviation degrees and deviation values of the waveforms;
the controller unit is respectively connected with the processing unit and the impact force generation module and is used for controlling the impact force generation module to apply impact to the acceleration sensor through the processing unit.
Furthermore, the acquisition module comprises a storage unit, and the storage unit is connected with the processing unit and is used for storing the acquired waveform and deviation data.
Furthermore, the acquisition module comprises a human-computer interaction interface which is a touch screen, and the touch screen is connected with the processing unit and used for controlling the processing unit to detect and display a detection result.
Furthermore, the jaws of the two current clamp sensors are surrounded on a line for controlling the electromagnet, and the sensor resistance measuring unit is connected with the output resistances of the two current clamp sensors.
The acquisition contacts of the two current clamp sensors are connected into a loop for controlling the electromagnet, and the sensor resistance measuring unit is connected with the output resistors of the two current clamp sensors.
The utility model discloses the beneficial effect who reaches is:
the detection device of the utility model can collect and confirm the parameters output by the normal acceleration sensor and the acceleration sensor to be detected when the acceleration sensors receive the same impact, and confirm whether the acceleration sensors to be detected are normal or not in a comparison mode; compared with the impact output instrument and instrument adopting the calibrated acceleration, speed and force in the prior art, the impact parameter accuracy of output can be directly confirmed without being regulated and controlled deliberately, and whether the sensor to be detected works normally or not can be directly confirmed; the utility model discloses a detection device compares accurate impact output instrument and instrument low price, and the small in size just does not need regular calibration to maintain, very big saving detection cost.
The utility model discloses a detection device has realized gathering the output impedance of many sensors through matrix switching circuit and a resistance collector, compares the mode of gathering resistance alone to every sensor for prior art and has reduced resistance collector, has further practiced thrift the cost.
The utility model discloses a detection device can effectively utilize supporting shoe self structure to produce deformation more obviously after receiving the impact with acceleration sensor setting on the supporting shoe of cross sectional dimension along with high increase, makes acceleration sensor can gather more obvious impact parameter.
The utility model discloses a detection device has still set up memory cell and human-computer interaction interface, and it is more convenient to make the collection operation and the result display of data through human-computer interaction interface, can save a large amount of sensor parameter data simultaneously, is convenient for to the reexamination of testing process and result.
The utility model discloses a detection device can also set up two current clamp sensors in the electro-magnet return circuit when detecting acceleration sensor, and the electric current that generates driving electromagnet makes the parameter of gathering current clamp sensor output simultaneously, carries out the contrast of same form to current clamp sensor, confirms to detect whether normal work of current clamp sensor is waited to detect.
Drawings
Fig. 1 is a schematic structural diagram of an acceleration sensor detection device based on comparison according to the present invention;
fig. 2 is a schematic structural diagram of a sensor fixing module in a contrast-based acceleration sensor detecting device according to the present invention;
fig. 3 is a schematic diagram illustrating the connection of the acquisition module in the acceleration sensor detection device based on comparison according to the present invention;
fig. 4 is a schematic diagram of the connection of a current clamp sensor in the acceleration sensor detection device based on comparison according to the present invention.
The device comprises a sensor fixing module 100, a supporting block 101, a sensor mounting hole 102, an acceleration sensor 103, an electromagnet 201 and a telescopic impact block 202.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to fig. 1-4. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the utility model provides an acceleration sensor detection device based on contrast, this acceleration sensor detection device include that sensor fixed module 100, impact strength produce module and collection module.
The sensor fixing module 100 is a supporting block 101 which is vertically arranged, the area of the upper surface of the supporting block 101 is larger than that of the lower surface, and the impact bearing surface is a vertical plane; the top of the supporting block 101 is provided with two sensor mounting holes 102 which are bilaterally symmetrical along the center, and the side surface of the supporting block 101 is provided with a screw hole matched with the sensor mounting hole 102 and used for fixing a sensor; the bottom of the supporting block 101 is provided with an installation screw hole for fixing the sensor fixing module 100 on the test platform.
As shown in fig. 2, in one embodiment, the sensor fixing module 100 is a supporting block 101 with a rectangular lower surface, and two threaded holes are symmetrically formed at the bottom of the supporting block 101 along the center in a left-right direction for fixing with the test platform. The supporting block 101 is divided into three sections according to height, the lower section is from the lower surface to the height of the supporting block 1/3, the middle section is from the height of the supporting block 1/3 to the height of the supporting block 2/3, and the upper section is from the height of the supporting block 2/3 to the upper surface. Wherein the cross section of the lower section is rectangular same as the lower surface; the cross section of the middle section is a rectangle with the same thickness as the cross section of the lower section and the width of the left side and the right side extending outwards; the upper section is a rectangle with the same width as the middle section and the thickness extending to the side not bearing impact. The upper surface is provided with two sensor mounting holes 102 which are bilaterally symmetrical along the center, and the sensor mounting holes 102 are convex and comprise a main body part in the middle and wing parts on two sides; the main part is used for accommodating vertically inserted acceleration sensor 103, and the alar part of both sides is used for accommodating acceleration sensor 103's staple bolt, and the alar part setting is being close to and bears impact surface one side, makes acceleration sensor 103 and bears the dorsal part laminating of impact surface.
The impact force generation module is fixed on the test platform and comprises an electromagnet 201 and a telescopic impact block 202, and the electromagnet 201 drives the telescopic impact block 202 to apply impact to the sensor fixing module 100; the telescopic striking block 202 faces the vertical center line of the impact-bearing surface of the sensor fixing module 100 for providing impact force.
In one embodiment, the telescopic impact block 202 faces the center point at the height of the support block 2/3, so that the acceleration sensors 103 disposed on both sides of the center of the support block 101 are subjected to the same impact force; the electromagnet 201 can change the impact strength of the telescopic impact block 202 by adjusting the current flowing through the electromagnet 201, and the impact strength can be adjusted between 100g and 2000 g.
As shown in fig. 3, the acquisition module includes a sensor connected to the acceleration sensor 103 and the impact force generation module, respectively, and is configured to control the impact force generation module to generate an impact and acquire an output parameter of the acceleration sensor 103; the device comprises a resistance measuring unit, a processing unit, a controller unit, a storage unit and a human-computer interaction interface.
The sensor resistance measuring unit is connected with two sensors at the same time, and comprises a digital matrix switching circuit and a resistance collector, wherein the digital matrix switching circuit adopts an analog switch to realize a matrix switching function; the channels are sequentially switched through the digital matrix switching circuit, and the resistance collector respectively obtains four output impedances of the two sensors, so that channel multiplexing of four-wire system resistance measurement is realized.
The processing unit is connected with the sensor resistance measuring unit and used for acquiring the parameters acquired by the sensor resistance measuring unit, generating output waveforms of the two sensors and analyzing the deviation degree and the deviation value of the waveforms.
One end of the controller unit is connected with the processing unit, and the other end of the controller unit is connected with the impact force generation module and used for controlling the impact force generation module to apply impact to the acceleration sensor 103 through the processing unit.
The storage unit is connected with the processing unit and used for storing the acquired sensor waveform and deviation data.
The human-computer interaction interface is connected with the processing unit, is a touch screen and is used for controlling the processing unit to detect and display a detection result.
The utility model provides an acceleration sensor detection device theory of operation as follows:
an acceleration sensor 103 that is confirmed to be good and an acceleration sensor 103 to be detected are disposed in the sensor mounting hole 102 in the sensor fixing module 100 at the main body portion, and both sides of the two hoops are fixed to the wing portions in the sensor mounting hole 102, respectively, so that the acceleration sensor 103 is fixed to the sensor fixing module 100.
The sensor fixing module 100 and the impact force generation module are fixed at corresponding positions on the test platform, and the two sensor connecting wires are connected with the sensor resistance measuring unit to complete the setting of the acceleration sensor detection device.
Through the operation of the human-computer interaction interface, the processing unit drives the telescopic impact block 202 to impact the sensor fixing module 100 through the controller unit, the sensor resistance measuring unit collects sensor output parameters, the processing unit generates collected waveforms and deviation values, whether the acceleration sensor 103 to be detected works normally is judged, and meanwhile, the waveforms, the deviation values and detection results are displayed through the human-computer interaction interface.
As shown in fig. 4, in an embodiment, while detecting the acceleration sensor 103, it is also possible to detect whether the current clamp sensor is working normally by the same method, and two current clamp sensor jaws are arranged around the line of the control electromagnet 201, one of the two current clamp sensors is a current clamp sensor for good confirmation and the other is a current clamp sensor to be detected; and meanwhile, the sensor resistance measuring unit is connected with the output resistors of the two current clamp sensors and is used for acquiring the output parameters of the two current clamp sensors. When the electromagnet 201 is controlled by current, the current parameters acquired by the current clamp sensor to be detected and the current clamp sensor with good confirmation are compared to judge whether the current clamp sensor to be detected works normally.
Although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention.
Claims (9)
1. The acceleration sensor detection device based on comparison is characterized by comprising a sensor fixing module (100), an impact force generation module and an acquisition module;
the sensor fixing module (100) is a supporting block (101) vertically arranged on the test platform, the area of the upper surface of the supporting block (101) is larger than that of the lower surface, and the impact bearing surface is a vertical plane; the top of the supporting block (101) is provided with two sensor mounting holes (102) which are symmetrical left and right along the center;
the impact force generation module comprises an electromagnet (201) and a telescopic impact block (202), the electromagnet (201) is installed on the test platform, and the telescopic impact block (202) is over against a vertical central line of an impact bearing surface of the sensor fixing module (100);
the acquisition module is respectively connected with the two acceleration sensors (103) and the impact strength generation module and is used for controlling the impact strength generation module to generate impact and acquiring output parameters of the two acceleration sensors (103);
one of the two acceleration sensors (103) is the acceleration sensor (103) for confirming normal, and the other is the acceleration sensor (103) to be detected.
2. The acceleration sensor detection device according to claim 1, characterized in that the acquisition module comprises a sensor resistance measurement unit that connects the two acceleration sensors (103) simultaneously for four output impedances;
the sensor resistance measuring unit comprises a digital matrix switching circuit and a resistance collector, and the resistance collector collects the four output impedances through a digital matrix switching circuit switching channel.
3. The acceleration sensor detecting device according to claim 1, characterized in that said supporting block (101) is divided into an upper section, a middle section and a lower section by height, said lower section is from the lower surface of said supporting block (101) to the height of said supporting block 1/3, said middle section is from the height of said supporting block 1/3 to the height of said supporting block 2/3, said upper section is from the height of said supporting block 2/3 to the upper surface of said supporting block (101);
the cross section of the lower section is a rectangle same as the lower surface; the cross section of the middle section is a rectangle which has the same thickness as the cross section of the lower section and the width of the left side and the right side extends outwards; the cross section of the upper section is a rectangle which has the same width as that of the cross section of the middle section and the thickness extending to the side which does not bear impact.
4. The acceleration sensor detecting device according to claim 3, characterized in that the telescopic striking block (202) is facing the center point at the height of the supporting block 2/3.
5. The acceleration sensor detecting device according to claim 1, characterized in that the sensor mounting hole (102) is of a convex type including a main body portion and wing portions on both sides, the wing portions being disposed near the impact receiving surface; the acceleration sensor (103) is arranged in the sensor mounting hole (102) through a hoop.
6. The acceleration sensor detecting device according to claim 2, characterized in that the acquisition module comprises a processing unit and a controller unit;
the processing unit is respectively connected with the sensor resistance measuring units and is used for acquiring parameters acquired by the sensor resistance measuring units, generating waveforms of the two acceleration sensors (103) and analyzing the deviation degrees and deviation values of the waveforms;
the controller unit is respectively connected with the processing unit and the impact strength generation module and is used for controlling the impact strength generation module to apply impact to the acceleration sensor (103) through the processing unit.
7. The acceleration sensor detecting device of claim 6, characterized in that the collecting module comprises a storage unit, which is connected with the processing unit for storing the collected waveform and deviation data.
8. The acceleration sensor detecting device of claim 6, wherein the collecting module comprises a human-computer interface, the human-computer interface is a touch screen, and the touch screen is connected with the processing unit and used for controlling the processing unit to detect and display a detection result.
9. The acceleration sensor detecting device according to claim 6, characterized in that the acceleration sensor detecting device comprises two current clamp sensors, one being a current clamp sensor that is confirmed to be good and one being a current clamp sensor to be detected;
the jaws of the two current clamp sensors are surrounded on a circuit for controlling the electromagnet (201), and the sensor resistance measuring unit is connected with the output resistors of the two current clamp sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022879376.8U CN213517194U (en) | 2020-12-02 | 2020-12-02 | Acceleration sensor detection device based on comparison |
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| CN202022879376.8U CN213517194U (en) | 2020-12-02 | 2020-12-02 | Acceleration sensor detection device based on comparison |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115980391A (en) * | 2023-03-21 | 2023-04-18 | 中国汽车技术研究中心有限公司 | Acceleration sensor testing method, apparatus and medium for event data recording system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115980391A (en) * | 2023-03-21 | 2023-04-18 | 中国汽车技术研究中心有限公司 | Acceleration sensor testing method, apparatus and medium for event data recording system |
| CN115980391B (en) * | 2023-03-21 | 2023-10-10 | 中国汽车技术研究中心有限公司 | Acceleration sensor testing method, equipment and medium of event data recording system |
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