CN212658195U - Electromechanical device and environmental test device - Google Patents

Abstract

The utility model provides an electromechanical device and environmental test device, wherein, electromechanical device includes: frock, coil structure, power, signal amplification circuit and signal generator, wherein, the frock is used for the fixed sensor that awaits measuring, coil structure installs on the frock and is located the sensor below, just coil structure with there is the clearance between the sensor, the negative pole of power with coil structure's first end is connected, the positive pole of power with signal amplification circuit's first end is connected, signal generator's signal output part with signal amplification circuit's second end is connected, coil structure's second end ground connection. The electromechanical device is simple in structure, small in size, easy to move and disassemble, and can be used for exciting the sensor in the environmental device in the environmental test process, and whether the working state of the sensor is abnormal can be comprehensively, timely and accurately judged through the output signal of the sensor.

Description

Electromechanical device and environmental test device

Technical Field

The utility model relates to the technical field of machinery, in particular to electromechanical device and environmental test device.

Background

The Hall type phase sensor is a sensor for detecting the valve timing of the engine based on the Hall principle. The probe of the phase sensor is internally provided with a Hall chip and a permanent magnet, so that the phase sensor can sense the change of a surrounding magnetic field, when the tooth crest or the tooth space of a camshaft signal wheel is close to each other, the phase sensor can respectively output different levels, and when the tooth crest and the tooth space of the camshaft signal wheel are different in width, the continuous time of the levels output by the phase sensor is also different along with the difference, so that the rotation angle of the camshaft signal wheel can be sensed.

When a phase sensor environment test is carried out, a camshaft signal wheel is theoretically needed to excite a sensor and monitor an output signal of the sensor to judge whether the working state of the sensor is abnormal in the test process, and then the accurate failure time of the sensor is recorded for reliability evaluation.

However, the environmental test of the prior phase sensor is not basically excited by the camshaft signal wheel, and the excitation of the sensor by the camshaft signal wheel during the test is not easy to realize, because the mechanism (with the main shaft and the coupling) for fixing the camshaft signal wheel is not necessarily capable of bearing the high-intensity temperature and humidity environment for a long time. Even if the mechanism is capable of withstanding, the associated cost is high and frequent replacement of the wear parts in the mechanism is required. In addition, the whole set of environment test device mainly consisting of the camshaft signal wheel and the mechanism for fixing the camshaft signal wheel is heavy, difficult to transfer and lack of maneuverability.

Therefore, the environmental test of the existing phase sensor is basically loaded by a simple power-on mode, a sample (i.e. the sensor to be tested) is generally taken out of the temperature box at intervals (for example, 100h), and whether the output signal of the sensor is normal or not is measured on a corresponding function table, which also inevitably causes problems: in the process of the environmental test, the test must be interrupted during the measurement, and the temperature box and the sensor are restored to normal temperature, so that the test period is prolonged; each measurement needs manual operation, the preparation work is more, the labor cost is increased, the measurement can be carried out only in a short time, and the test result is not accurate; in an environment test, only power-on can be carried out, the output voltage cannot be comprehensively monitored, the abnormal condition of a test sample cannot be found in time, and the failure time of the sensor cannot be accurately obtained. The above problems are not favorable for failure analysis of the sensor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electromechanical device can encourage the sensor in environmental test to whether the operating condition of judging the sample that can be comprehensive, timely, accurate through the output signal of sensor is unusual, has improved the inefficacy analysis effect of sample.

In order to achieve the above object, the present invention provides an electromechanical device, including: frock, coil structure, power, signal amplification circuit and signal generator, wherein, the frock is used for fixed sensor that awaits measuring, the coil structure is installed on the frock and be located the sensor below, just the coil structure with there is the clearance between the sensor, the negative pole of power with the first end of coil structure is connected, the positive pole of power with the first end of signal amplification circuit is connected, signal generator's signal output part with the second end of signal amplification circuit is connected, the second end ground connection of coil structure.

Optionally, in the electromechanical device, the signal amplification circuit includes a transistor and a resistor, one end of the resistor is connected to a collector of the transistor, and the other end of the resistor is used as a first end of the signal amplification circuit and is connected to a positive electrode of the power supply; the base electrode of the triode is used as the second end of the signal amplification circuit and is connected with the signal output end of the signal generator; and the emitter of the triode is used as the third end of the signal amplification circuit, is mutually connected with the second end of the coil structure and the grounding end of the signal generator and is grounded.

Optionally, in the electromechanical device, the coil structure includes a housing, a coil located inside the housing, an iron core located in the center of the coil, a heat insulating material located at the top of the coil, and an epoxy resin filled inside the housing, wherein a first end and a second end of the coil respectively penetrate through the housing and are connected to corresponding devices, and the epoxy resin is used for fixing the coil and the iron core.

Optionally, in the electromechanical device, the tool includes: the base, be located fixed establishment and Z on the base are to adjusting the hob, wherein, fixed establishment is used for fixed placing the coil structure, Z is to installing regulating block and adjustable ring on adjusting the hob, regulating block and adjustable ring are used for fixing the sensor, and make the sensor is located coil structure top and with the clearance has between the coil structure.

Optionally, in the electromechanical device, the adjusting block includes an X-direction adjusting block and a Y-direction adjusting block, the Y-direction adjusting block is fixed to the Z-direction adjusting screw rod, the X-direction adjusting block is located on the Y-direction adjusting block, and the sensor is fixed to the X-direction adjusting block.

Optionally, in the electromechanical device, the Y-direction adjusting block has a hole structure along a length direction, the Z-direction adjusting screw rod passes through the hole structure, and the Y-direction adjusting block is fixed at a position on the Z-direction adjusting screw rod and can be changed in a Y direction relative to the position of the hole structure, so as to move the Y-direction adjusting block in the Y direction.

Optionally, in the electromechanical device, a sliding groove track along the X direction is formed on the Y-direction adjusting block, and the bottom of the X-direction adjusting block is located in the sliding groove track and moves in the X direction in the sliding groove track.

Optionally, in the electromechanical device, the adjusting ring includes a first adjusting ring and a second adjusting ring, and the first adjusting ring and the second adjusting ring are located on two sides of the Y-direction adjusting block in the Z direction, and are used for fixing the height and the horizontal position of the Y-direction adjusting block, and the first adjusting ring and the second adjusting ring are matched to fix the Y-direction adjusting block at different heights on the Z-direction adjusting screw rod, so as to realize displacement adjustment of the sensor in the Z direction.

Optionally, in the electromechanical device, the sensor is a phase sensor or a rotational speed sensor.

In order to achieve the above objects and other objects, the present invention also provides an environmental test apparatus, including: the sensor testing device comprises an environment device, the electromechanical device and a power-on mode circuit, wherein part of the structure of the electromechanical device is arranged in the environment device, the electromechanical device is used for fixing a sensor to be tested and exciting the sensor in an environment test, and the power-on mode circuit is connected with the sensor and is used for powering on the sensor.

To sum up, the utility model provides an electromechanical device includes: the fixture is used for fixing a sensor to be tested; the signal generator is used for controlling the on-off conversion frequency of the coil structure so as to simulate the rotating speed of a camshaft signal wheel; the signal amplification circuit and the power supply are used for controlling the size of the generated magnetic field so as to simulate the width of a gap between the camshaft signal wheel and the sensor; a coil structure for generating a magnetic field. The electromechanical device can excite the sensor in an environmental test, whether the working state of the sensor is abnormal or not can be judged comprehensively, timely and accurately through the output signal of the sensor, the failure analysis effect of the sensor is improved, and the electromechanical device is simple in structure, small in size, easy to move and disassemble and cost-saving.

Drawings

FIGS. 1-2 are schematic diagrams of a camshaft signal wheel trigger sensor;

FIG. 3 is a schematic illustration of a power-up mode for loading;

fig. 4 is a schematic structural diagram of an electromechanical device according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a coil structure in the electromechanical device of FIG. 4;

FIG. 6 is a CAE electromagnetic simulation of the coil structure of FIG. 5;

FIG. 7 is a normal diagram of the normalized effect of the DOE method for analyzing the magnetic field

FIG. 8 is a normal plot of the normalized effect of the DOE method on the analysis of the heating value;

FIG. 9 is a plot of magnetic field difference versus C (line radius), A (outer radius);

FIG. 10 is a contour plot of magnetic field difference versus C (line radius), A (outer radius);

FIG. 11 is a schematic diagram of the structure of the tooling in the electromechanical device of FIG. 4;

FIGS. 12-13 are functional diagrams of the electromechanical device trigger sensor of FIG. 4;

FIG. 14 is a graph of the output signal of a camshaft signal wheel activated sensor;

FIG. 15 is a graph of the output signal of a coil configuration triggered sensor in the electromechanical device of FIG. 4;

FIG. 16 is a graph of monitoring of a power-up only mode in an environmental test;

FIG. 17 is a graph of monitoring the simultaneous presence of an upper power mode and the electromechanical device of FIG. 4 in an environmental test;

in fig. 1 to 3:

01-sensor, 011-Hall chip, 012-permanent magnet, 02-camshaft signal wheel, 021-tooth top, 022-tooth space, 03-temperature box, 04-loading box, 05-data recorder, 06-power supply;

in fig. 4 to 17:

10-sensor, 101-hall chip, 102-permanent magnet, 20-coil structure, 201-shell, 202-coil, 2021-first end of coil, 2022-second end of coil, 203-heat insulation material, 204-epoxy resin, 30-tooling, 301-base, 302-fixed structure, 303-Z direction adjusting screw rod, 304-X direction adjusting block, 305-Y direction adjusting block, 306-first adjusting ring, 307-second adjusting ring, 40-power supply, 50-signal amplifying circuit, 501-resistance, 502-collector, 503-base, 504-emitter, 60-signal generator.

Detailed Description

The electromechanical device proposed by the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

Referring to fig. 1-2, the working principle of environmental testing of a sensor to be tested (i.e. a camshaft signal wheel excitation sample to be tested) is shown. The sensor 01 has a probe with a hall chip 011 and a permanent magnet 012, so that the sensor 01 can sense the change of the surrounding magnetic field, see the magnetic field curve L1 at the hall chip 011 in fig. 2. When the tooth top 021 or the tooth space 022 of the camshaft signal gear 02 approaches the hall chip 011, the sensor 01 outputs different levels respectively, and when the tooth top 021 and the tooth space 022 are different in width, the duration of the level output by the sensor 01 is also different, which is shown in fig. 2 as an output voltage curve L2 of the sensor 01, so that the rotation angle of the camshaft signal gear 02 can be sensed.

However, the environmental test of the existing sensor is not basically excited by the camshaft signal wheel 02, mainly because the mechanism (having the main shaft and the coupling) for fixing the camshaft signal wheel 02 cannot necessarily endure a high-intensity temperature and humidity environment for a long time, and even if the mechanism can endure, the corresponding manufacturing cost is high, and the wearing parts in the mechanism need to be frequently replaced, and in addition, the whole environmental test device mainly composed of the camshaft signal wheel 02 and the mechanism for fixing the camshaft signal wheel 02 is heavy, difficult to transfer, and lacks maneuverability. The camshaft signal wheel 02 is not typically placed in a temperature chamber of an environmental test, and therefore, the sensor cannot be activated during the environmental test.

The general environmental test of the sensor is basically loaded by a simple power-on mode, then the sensor 01 to be tested is taken out of a temperature box at intervals (for example, 100h), and is placed on a function table to measure whether the output signal of the sensor 01 is normal, namely, the power-on is only carried out in the environmental test process, then the environmental test is interrupted, the sensor 01 is taken out of the temperature box and is placed on the function table, a motor of the function table is used for driving a camshaft signal wheel 02, the camshaft signal wheel 02 is used for exciting the sensor 01, and finally, whether the output signal of the sensor 01 is normal is measured. As shown in fig. 3, the environmental test device loaded in the power-on mode generally includes a temperature box 03 for placing a sensor 01, a loading box 04 connected to the sensor 01, a data recorder 05 connected to the loading box 04, and a power supply 06. Wherein, the power 06 provides the required current, the data recorder 05 is used for acquiring the output signal of the sensor 01 and storing the acquired result for standby, and the loading box 04 is used for circuit connection.

The environmental testing of the above-described sensors inevitably entails some problems:

firstly, in the process of environmental test, the test must be interrupted during measurement, and the temperature box and the sensor are restored to normal temperature, so that the test period is prolonged;

secondly, each measurement needs manual operation, and preparation work is more, so that the labor cost is increased, the measurement can be carried out only in a short time, and the test result is not accurate;

thirdly, in the environmental test process, only the sensor can be electrified, the output signal is a certain value, and the abnormal condition of the sensor cannot be found in time (for example, the output electricity is usually high due to the open circuit of the Hall chip and the circuit, and the high and low levels are narrowed or normally low due to the short circuit of the circuit); the failure time of the sensor cannot be accurately obtained.

The above problems are not favorable for failure analysis of the product.

In order to improve the failure analysis effect of sensor, the utility model provides an electromechanical device adopts the alternating magnetic field that coil structure among the electromechanical device produced to trigger the sensor work of examination of awaiting measuring promptly to need not to interrupt the environmental test, consequently, coil structure among the electromechanical device triggers stably continuously, and can be comprehensive, timely and the accurate dead time who acquires the sensor.

Referring to fig. 4, the electromechanical device includes: the coil structure comprises a coil structure 20, a tool 30, a power supply 40, a signal amplification circuit 50 and a signal generator 60, wherein the tool 30 is used for fixing a sensor 10 to be tested, the coil structure 20 is located below the sensor 10 to be tested, a gap exists between the coil structure 20 and the sensor 10 to be tested, the gap is preferably 1 mm-5 mm, the negative electrode of the power supply 40 is connected with the first end of the coil structure 20, the positive electrode of the power supply 40 is connected with the first end of the signal amplification circuit 50, the signal output end of the signal generator 60 is connected with the second end of the signal amplification circuit 50, and the grounding end of the signal generator 60 is connected with the second end of the coil structure 20 and the third end of the signal amplification circuit 50 and grounded.

The coil structure 20 is used for generating a magnetic field, and its main structure is shown in fig. 5, and includes: the coil comprises a shell 201, a coil 202 positioned inside the shell 201, a core (not shown in the figure) positioned in the center of the coil 202, an insulating material 203 positioned on the top of the coil 202, and an epoxy resin 204 filled inside the shell 201, wherein a first end 2021 of the coil 202 and a second end 2022 of the coil 202 penetrate out of the shell 201 and are connected with corresponding devices, for example, the first end 2021 of the coil is connected with the negative electrode of the power supply 40, the second end 2022 of the coil is grounded, and the epoxy resin 204 is used for fixing the coil 202 and the core.

The housing 201 is preferably a material resistant to high and low temperatures, humidity and/or salt spray chemicals, and more preferably a PA (Polyamide) plastic. The epoxy resin 204 is poured into the housing 201 to fix the coil 202 and the iron core. The iron core is located at the center of the coil 202 for concentrating the generated magnetic field. At least one layer of heat insulating material 203 is added on top of the coil 202 to prevent heat from the coil structure 20 from being transferred to the sensor 10 to be tested, which is fixed at the tool 30. Referring to fig. 6 to 10, a CAE (Computer Aided Engineering) simulation and a DOE (Design of experimental Design) method may be adopted to solve the main factors affecting the magnitude of the magnetic field generated by the coil structure and the heat generation amount, and establish a database of coil structure parameter Design, so as to facilitate screening of optimal parameters for balancing the magnetic field and the heat generation amount. FIG. 7 is a normal plot of normalized effect with a significance factor of 0.03 in response to a magnetic field strength of 1500Hz, and it can be seen that A (outer radius) and C (wire radius) of the coil are significant factors affecting the magnetic field, i.e., A (outer radius) and C (wire radius) of the coil have a relatively large effect on the magnetic field; fig. 8 is a normal diagram of a normalized effect in which the significant factor is 0.03 in response to the current being carried, and it can be found that a (outer radius), C (wire radius), and B (height) of the coil are significant factors that affect the amount of heat generation, that is, a (outer radius), C (wire radius), and B (height) of the coil have a relatively large influence on the amount of heat generation. FIG. 9 is a graph of the difference in magnetic field versus the values of C (line radius) and A (outer radius), which is obtained under the conditions of a height of 0.01m and an inner diameter of 0.003 m. FIG. 10 is a contour plot of magnetic field difference versus C (line radius), A (outer radius), and the dashed area in FIG. 10 is the sensor transition switching field threshold. As can be seen from fig. 9 and 10, the coil has a C (wire radius) in the range of 0.000053m to 0.00009m, and the coil has an a (outer radius) in the range of 0.0015m to 0.012 m. Namely, the optimal parameters for balancing the magnetic field and the heat productivity can be screened out through CAE simulation and DOE method.

The fixture 30 is mainly used for fixing the sensor 10 to be tested, the sensor 10 to be tested is preferably a phase sensor and a rotation speed sensor, and the structure of the fixture 30 is shown in fig. 11, and includes: the coil structure comprises a base 301, a fixing mechanism 302 positioned on the base 301, and a Z-direction adjusting screw rod 303, wherein the fixing mechanism 302 is used for placing the coil structure 20, the fixing mechanism 302 is directly fixed on the base 301 through rivets or adhesives, the fixing mechanism 302 may be a hollow structure without a top cover, and the coil structure 20 is directly placed in the fixing mechanism 302. An adjusting block and an adjusting ring are mounted on the Z-direction adjusting screw rod 303, and the sensor 10 to be tested is fixed through the adjusting block and the adjusting ring, so that the sensor 10 is located above the coil structure 20 and has a gap with the coil structure 20.

The Z-adjusting screw 303 may be a screw having a thread, and preferably has a cylindrical shape at a portion lower than the fixing mechanism 302, and has four faces at a portion higher than the fixing mechanism 302, wherein two opposite faces are rectangular, and two rectangles are parallel in the Y direction, and the other two faces are curved faces having a thread thereon. The Z-direction adjusting screw 303 may be directly fixed to the base 301 or may slide on the base 301. The scheme that the Z-direction adjusting screw rod 303 slides on the base 301 can be specifically realized by adopting the following mode: be provided with the spout track on the base 301, the bottom of Z to adjusting hob 303 is located in the spout track, the spout track can be the spout track of X direction or the spout track of Y direction, consequently, Z can to adjusting hob 303 realize in the spout track that X direction or Y direction remove.

The adjusting block comprises an X-direction adjusting block 304 and a Y-direction adjusting block 305, the Y-direction adjusting block 305 is fixed on the Z-direction adjusting screw rod 303, the X-direction adjusting block 304 is located on the Y-direction adjusting block 305, and the sensor 10 to be tested can be fixed on the X-direction adjusting block 304 through bolts.

The Y-adjustment block 305 has a hole structure along the length direction, which may be rectangular-like, for the Z-adjustment screw 303 to pass through. The Z-direction adjusting screw 303 passes through the hole structure, and the position of the Y-direction adjusting block 305 fixed on the Z-direction adjusting screw 303 can be changed relative to the position of the hole structure, thereby realizing the movement of the Y-direction adjusting block 305 in the Y direction.

A chute track along the X direction is formed on the Y-direction adjusting block 305, and the bottom of the X-direction adjusting block 304 is located in the chute track and realizes the movement in the X direction in the chute track. Thus, the position of the sensor 10 to be tested can be adjusted to a suitable position and fixed by the engagement of the Y-direction adjusting block 305 and the X-direction adjusting block 304.

The adjusting rings include a first adjusting ring 306 and a second adjusting ring 307, and the first adjusting ring 306 and the second adjusting ring 307 are located on two sides (i.e., upper and lower sides) of the Y-direction adjusting block 305 in the Z direction, and are used for fixing the height and horizontal position of the Y-direction adjusting block 305, and realizing displacement adjustment of the sensor 10 in the Z direction through height change of the Y-direction adjusting block 305 fixed on the Z-direction adjusting screw rod 303.

The X-direction adjusting block 304, the Y-direction adjusting block 305 and the Z-direction adjusting screw rod 303 on the tool 30 are used as supporting points for fixing the sensor 10 to be tested, and the position of the sensor 10 to be tested can be adjusted in three directions to adjust the relative position between the sensor and the coil structure 20, so as to meet the requirements of sensors with different sizes. The method for adjusting the displacement in the X direction comprises the steps that the X-direction adjusting block 304 moves in the X direction and/or the Z-direction adjusting screw 303 moves in the X direction; the method for adjusting the displacement in the Y direction comprises the movement of the Y-direction adjusting block 305 in the Y direction and/or the movement of the Z-direction adjusting screw 303 in the Y direction; the method of Z-direction adjustment displacement includes height adjustment of the Y-direction adjustment block 305 in the Z-direction.

From the above, the tool 30 has a simple structure, a small volume, is easy to move and disassemble, and saves cost.

The signal amplifying circuit 50 has a transistor and a resistor 501, wherein the resistor 501 mainly plays a role of current limiting and protects the transistor from being burned out. One end of the resistor 501 is connected with a collector 502 of the triode, and the other end of the resistor 501 is a first end of the signal amplification circuit 50 and is connected with the positive electrode of the power supply 40; a base 503 of the triode is a second end of the signal amplifying circuit 50, and is connected with a signal output end of the signal generator 60; the emitter 504 of the triode is the third terminal of the signal amplifying circuit 50, and is connected to the second terminal of the coil structure 20 and the ground terminal of the signal generator 60 and grounded.

The signal generator 60 controls the on-off conversion frequency of the coil structure 20 so as to simulate the rotating speed of a camshaft signal wheel. The signal amplification circuit 50 and the power supply 40 are used for controlling the magnitude of the generated magnetic field so as to simulate the width of a gap between the camshaft signal wheel and a sensor to be tested.

The electromechanical device can act on a phase sensor, the center of the phase sensor and the center of the coil structure are on the same vertical line, the electromechanical device is also suitable for a rotating speed sensor, but the center of the sensor and the center of the coil structure need to be offset by about 1-5 mm.

The utility model provides an electromechanical device simple structure, easy removal and easy disassembly, moreover electromechanical device is small, and its coil structure and frock can directly be placed in the environment device, only need be in set up corresponding perforation on the environment device to supply corresponding wire to pass can, and need not reform transform the environment device, save the cost. Because the coil structure and the tool are arranged in the environment device, the coil structure can excite the sensor to be tested, and the measurement of the sensor does not need to be carried out on a function table, so that the continuous and stable excitation and measurement can be directly carried out in the environment device without interrupting the test when the sensor is used for measurement, and the test period is effectively shortened. And through the adjustment of functional parameters, the environment device and the sensor do not need to be cooled.

The utility model also provides an environmental test device, include: the sensor testing device comprises an environment device, the electromechanical device and a power-on mode circuit (see fig. 3), wherein the electromechanical device is used for fixing a sensor to be tested and exciting the sensor to be tested in an environment test, and the power-on mode circuit is connected with the sensor to be tested and is used for powering on the sensor to be tested. The environmental device includes a test chamber for simulating various environmental conditions, and a part of the structure of the electromechanical device, such as a coil structure and a tool of the electromechanical device in place of the camshaft signal wheel, may be disposed in the test chamber of the environmental device. During test, the environment test device can continuously measure the sensor without interrupting the test.

In order to simulate the working state of a sample (the sensor 10 to be tested) in the environmental test process, a coil structure in an electromechanical device is used for replacing a camshaft signal wheel to generate an alternating magnetic field for triggering the sensor 10 to work. Referring to fig. 12, the sensor 10 is preferably a phase sensor, and the probe of the phase sensor has a hall chip 101 and a permanent magnet 102, when the coil structure 20 is energized (Y), the magnetic induction lines near the hall chip 101 become dense, the magnetic induction intensity increases, similar to the effect of increasing the magnetic induction intensity generated by the tooth top of the camshaft signal wheel through the end surface of the sensor (see the magnetic field curve L3 at the hall chip 101 in fig. 13), and when the magnetic induction intensity exceeds the switching threshold, the output level of the sensor is caused to change (see the output voltage curve L4 of the sensor in fig. 13). When the coil structure 20 is powered off (N), the magnetic induction intensity near the hall chip 101 is restored to the initial state, similar to the effect generated by the gear groove of the camshaft signal wheel passing through the end face of the sensor, and when the magnetic induction intensity is reduced to exceed the switching threshold value, the output level of the sensor is restored to the initial state again. Therefore, the switching on and off of the coil structure 20 can simulate the tooth crest and tooth space of the camshaft signal wheel, and the switching on and off time can be equivalent to simulate the lengths of the tooth crest and the tooth space.

The signal results obtained by the coil structure in the electromechanical device triggering the sensor are shown in fig. 14, and the signal results obtained by the camshaft signal wheel triggering the sensor are shown in fig. 15, and the level values, the level duration and the rising and falling of the two are consistent in terms of the sensor output signals, namely, the output signal line L5 obtained by the coil structure in the electromechanical device triggering the sensor and the output signal line L6 obtained by the camshaft signal wheel triggering the sensor. Thus, the coil structure of the electromechanical device can be used to activate the sensor instead of the camshaft signal wheel.

The monitoring curve in the case of a circuit having only a power-on mode is shown in fig. 16, in which the sensor is placed in an environmental apparatus and an environmental test is performed; the monitoring curve for the case of a coil structure with a power-up mode circuit, together with electromechanical means for exciting the sensor (i.e. with the environmental test apparatus) is shown in fig. 17. In both fig. 16 and 17, where the line L7 is temperature and the line L8 is output signal strength, it can be seen from a comparison of fig. 16 and 17 that the monitoring curve under the excitation of the coil structure of the electromechanical device better conforms to the actual operating output curve of the sensor. When only the power-on mode circuit is provided, the level of the sensor output is a certain value, the reaction is a straight line in the test chart, and only partial element abnormality can be measured, for example, the element is disconnected, and the output signal becomes 0. Many abnormal components can not be measured, for example, the output power is normally high due to the hall chip and the circuit break, the high and low levels are narrowed or normally low due to the circuit short circuit, and the like, so that the sensor is only electrified but not excited, and the output signal can not comprehensively, accurately and timely find the abnormal condition of the sensor for the environmental test. If the sensor is excited by a camshaft signal wheel, the test must be interrupted, the sensor is taken out of the environment device and placed on a functional table for excitation, the test period is prolonged, manual operation is needed in the measuring process, preparation work is more, and labor cost is increased. And when having last electric mode circuit and electromechanical device, adopt promptly environmental test device, electromechanical device's coil structure excitation the sensor, the output signal of sensor can change along with the magnetic field change that coil structure produced, the component in the sensor is unusual all can reflect in output signal, consequently, can be comprehensive, timely, accurate judge whether the operating condition of sensor is unusual. And electromechanical device's partial structure can set up in environmental device, for example be used for triggering the coil structure of sensor work and be used for fixing the frock of sensor, consequently need not interrupt test in the test process, can continuous stable trigger sensor, and need not adopt the great function platform operation of volume moreover, promptly the utility model discloses an electromechanical device is small, can directly place in environmental device, need not reform transform environmental device, practices thrift the cost.

It is thus clear that the embodiment of the utility model provides an electromechanical device simple structure easily removes and easily disassembles, saves the cost. And the electromechanical device can excite the sensor to be tested in an environmental test, and the output signal of the sensor can comprehensively, timely and accurately judge whether the working state of the sensor is abnormal or not, so that the failure analysis effect of the sensor is improved.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims (10)

1. An electromechanical device, comprising: frock, coil structure, power, signal amplification circuit and signal generator, wherein, the frock is used for fixed sensor that awaits measuring, the coil structure is installed on the frock and be located the sensor below, just the coil structure with there is the clearance between the sensor, the negative pole of power with the first end of coil structure is connected, the positive pole of power with the first end of signal amplification circuit is connected, signal generator's signal output part with the second end of signal amplification circuit is connected, the second end ground connection of coil structure.

2. The electromechanical device according to claim 1, wherein the signal amplification circuit includes a transistor and a resistor, one end of the resistor is connected to a collector of the transistor, and the other end of the resistor is connected to a positive terminal of the power supply as a first end of the signal amplification circuit; the base electrode of the triode is used as the second end of the signal amplification circuit and is connected with the signal output end of the signal generator; and the emitter of the triode is used as the third end of the signal amplification circuit, is mutually connected with the second end of the coil structure and the grounding end of the signal generator and is grounded.

3. The electromechanical device of claim 1, wherein the coil structure comprises a housing, a coil inside the housing, a core in the center of the coil, a thermal insulation material on top of the coil, and an epoxy resin filling the inside of the housing, wherein the first and second ends of the coil each exit the housing and are connected to a respective component, the epoxy resin securing the coil and core.

4. The electromechanical device of claim 1, wherein the fixture includes a base, a fixing mechanism disposed on the base, and a Z-direction adjusting screw rod, wherein the fixing mechanism is used for fixing and placing the coil structure, and an adjusting block and an adjusting ring are mounted on the Z-direction adjusting screw rod, and the adjusting block and the adjusting ring are used for fixing the sensor and enabling the sensor to be located above the coil structure with a gap therebetween.

5. The electromechanical device according to claim 4, wherein the adjusting block includes an X-direction adjusting block and a Y-direction adjusting block, the Y-direction adjusting block is fixed to the Z-direction adjusting screw, the X-direction adjusting block is located on the Y-direction adjusting block, and the sensor is fixed to the X-direction adjusting block.

6. The electromechanical device of claim 5, wherein the Y-adjustment block has a hole structure along a length direction thereof, and the Z-adjustment screw rod passes through the hole structure, and the Y-adjustment block is fixed to the Z-adjustment screw rod at a position that can be changed in the Y-direction with respect to the position of the hole structure to realize the movement of the Y-adjustment block in the Y-direction.

7. The electromechanical device according to claim 5, wherein the Y-direction adjustment block is formed with a chute track along the X-direction, and a bottom portion of the X-direction adjustment block is located in the chute track and performs X-direction movement in the chute track.

8. The electromechanical device according to claim 5, wherein the adjusting rings include a first adjusting ring and a second adjusting ring, and the first adjusting ring and the second adjusting ring are located on both sides of the Y-direction adjusting block in the Z direction for fixing the height and the horizontal position of the Y-direction adjusting block, and the first adjusting ring and the second adjusting ring are engaged to fix the Y-direction adjusting block at different heights on the Z-direction adjusting screw rod to achieve the displacement adjustment of the sensor in the Z direction.

9. The electromechanical device of claim 1, wherein the sensor is a phase sensor or a rotational speed sensor.

10. An environmental test apparatus, comprising: the sensor testing device comprises an environment device, an electromechanical device and a power-on mode circuit, wherein part of the structure of the electromechanical device is arranged in the environment device, the electromechanical device is used for fixing a sensor to be tested and exciting the sensor in an environment test, and the power-on mode circuit is connected with the sensor and is used for powering on the sensor.

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