CN211042468U

CN211042468U - Discrimination threshold testing mechanism

Info

Publication number: CN211042468U
Application number: CN201921758946.9U
Authority: CN
Inventors: 林硕; 沈小燕; 谢杰; 赖征创; 梁伟; 王秀荣; 阙鹏峰
Original assignee: Fujian Metrology Institute
Current assignee: Fujian Metrology Institute
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-07-17
Anticipated expiration: 2029-10-18

Abstract

The utility model provides a distinguish threshold accredited testing organization, including leading truck, lead screw, test walking beam and force sensor, sliding connection about the test walking beam in the leading truck, the both ends of lead screw with the leading truck rotates to be connected, the lead screw still with test walking beam threaded connection, force sensor with test walking beam fixed connection. The utility model has the advantages that: load is exerted through the position of adjusting the test walking beam, and the test walking beam operation is stable, and force sensor real-time detection exerts the numerical value of load, and the variable quantity of exerting the load is easily controlled, and the accuracy is high, and the operation is convenient.

Description

Discrimination threshold testing mechanism

[ technical field ] A method for producing a semiconductor device

The utility model relates to a measuring apparatus examination technical field, concretely relates to distinguish threshold accredited testing organization.

[ background of the invention ]

According to the requirements of the national metrological verification regulation JJJG 539-2016 digital indicating scale, when the hook scale is verified, the identification threshold of the hook scale needs to be tested, and the test process is carried out according to the following modes: "on a balance scale, an additional load equal to 1.4 times the actual division (1.4e) is gently placed or removed, and the scale indication should change significantly. "according to the regulation requirements, the verification of the hook scale identification threshold is mainly carried out by manual loading, usually every 0.1e, i.e. small weights with different weights are prepared according to different division values. As shown in table 1 below, the corresponding division values of hook scales with different specifications are different, so that a large number of small weights with different specifications need to be prepared before verification. During testing, the hook scales are manually loaded one by one (each is 0.1e) until the 1.4e small weights are added. The loading mode has the advantages of low automation degree, large workload, low efficiency, poor accuracy and high error rate.

TABLE 1 identification threshold loading List

[ Utility model ] content

For overcoming the defect that current test method exists, the utility model provides an distinguish threshold accredited testing organization comes the accuracy to apply the load through the position of adjusting the test walking beam, has avoided the manual work to add the problem that little weight inefficiency, error rate are high piece by piece.

The utility model discloses a realize like this: the utility model provides an distinguish threshold accredited testing organization, includes leading truck, lead screw, test walking beam and force transducer, sliding connection about the test walking beam in the leading truck, the both ends of lead screw with the leading truck rotates to be connected, the lead screw still with test walking beam threaded connection, force transducer with test walking beam fixed connection.

Further, the guide frame is provided with a guide rod, and the test moving beam is connected with the guide rod in a sliding mode.

Further, still include servo motor, servo motor's fuselage with leading truck fixed connection, servo motor's output shaft with lead screw transmission is connected.

Further, still include the weight connecting piece, the weight connecting piece has the fender ring, the weight connecting piece passes force sensor and sliding connection, keep off the ring and be located force sensor's below.

Furthermore, the weight connecting piece is fixedly connected with the ball-end pull rod, and the ball-end pull rod is positioned above the force sensor.

The utility model has the advantages that: load is exerted through the position of adjusting the test walking beam, and the test walking beam operation is stable, and force sensor real-time detection exerts the numerical value of load, and the variable quantity of exerting the load is easily controlled, and the accuracy is high, and the operation is convenient.

[ description of the drawings ]

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of the structure of the discrimination threshold testing mechanism of the present invention.

Fig. 2 is a schematic diagram of the discrimination threshold testing mechanism of the present invention installed in the verification rack.

Fig. 3 is a partially enlarged view of a in fig. 2.

Figure 4 is the utility model discloses an assembly section schematic diagram of test walking beam, force sensor, weight connecting piece and backup pad.

The labels in the figure are: the device comprises an identification threshold testing mechanism 1, a guide frame 11, a guide rod 111, a screw rod 12, a testing moving beam 13, a force sensor 14, a servo motor 15, a weight connecting piece 16, a stop ring 161, a ball pull rod 17, a verification rack 2, a supporting plate 21, a weight component 3 and a pull head 4.

[ detailed description ] embodiments

Referring to fig. 1-4, a preferred embodiment of the discrimination threshold test mechanism 1 of the present invention; the testing device comprises a guide frame 11, a screw rod 12, a testing moving beam 13 and a force sensor 14, wherein the testing moving beam 13 is connected to the guide frame 11 in an up-and-down sliding manner, the guide frame 11 is provided with a guide rod 111, and the testing moving beam 13 is connected with the guide rod 111 in a sliding manner, so that the testing moving beam 13 runs stably; the two ends of the screw rod 12 are rotatably connected with the guide frame 11, the screw rod 12 is further in threaded connection with the test moving beam 13, and when the screw rod 12 rotates forwards or backwards, the test moving beam 13 can move upwards and downwards. The force sensor 14 is fixedly connected with the test moving beam 13, the test moving beam 13 drives the force sensor 14, and the force sensor 14 detects applied load in real time when contacting an object.

The device also comprises a servo motor 15, a weight connecting piece 16 and a ball head pull rod 17. The body of the servo motor 15 is fixedly connected with the guide frame 11, and an output shaft of the servo motor 15 is in transmission connection with the screw rod 12; the operation of the servo motor 15 is remotely controlled by a worker through a control system, and the screw rod 12 is driven to rotate by the servo motor 15, so that the moving position of the test moving beam 13 is controlled. The weight connecting piece 16 is provided with a stop ring 161, the weight connecting piece 16 penetrates through the force sensor 14 and is connected in a sliding mode, and the stop ring 161 is located below the force sensor 14; when the test moving beam 13 moves downwards and the force sensor 14 contacts the stop ring 161, the load is applied to the weight connecting piece 16, the rotation amount of the screw rod 12 is finely adjusted and controlled, and then the movement amount of the test moving beam 13 is finely adjusted, so that the load applied to the weight connecting piece 16 is finely adjusted. The ball-head pull rod 17 is fixedly connected with the weight connecting piece 16, and the ball-head pull rod 17 is positioned above the force sensor 14; the test moving beam 13 moves the power sensor 14 between the ball tie rod 17 and the stopper ring 161.

The discrimination threshold test mechanism 1 functions as a loading structure required for the discrimination threshold test performed at the time of the hook scale inspection. Referring to fig. 2 and 3 again, in a specific use, the guide frame 11 is fixedly connected to the support plate 21 of the verification rack 2 through screws, the ball-end pull rod 17 passes through a through hole of the support plate 21, the ball-end pull rod 17 is fixedly connected with the pull head 4, the pull head 4 is fixedly connected with the lower hook part of the electronic hanging scale through a bolt, and the upper hook part of the electronic hanging scale is fixed; the weight attachment 16 is also fixedly connected to the weight assembly 3. Through the amount of movement of adjusting test walking beam 13 to the effort size that the control was applyed weight connecting piece 16, this effort passes through weight connecting piece 16 and transmits for electronic hanging balance, and force sensor 14 shows the effort numerical value of applying and changes, and whether staff observes the demonstration numerical value of hanging hook balance and changes and the change volume simultaneously.

During loading: when the electronic hanging scale is loaded in a balanced state (namely, the weight is in a loaded state), the servo motor 15 drives the screw rod 12 to rotate, so that the test moving beam 13 moves downwards along the guide rod 111, a force value is generated after the force sensor 14 on the test moving beam 13 is contacted with the stop ring 161 of the weight connecting piece 16, according to the principle of acting force and reaction force, a load is applied to the weight connecting piece 16 at the moment, namely, the electronic hanging scale, the rotation amount of the servo motor 15 is controlled through the control system at the moment, a load increment of 0.1e is slowly applied to the force sensor 14 until the loading of 1.4e is completed, and at the moment, whether the indication value of the hanging scale is obviously changed or not is observed, namely, the test for identifying the threshold is completed.

Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A discrimination threshold test mechanism, characterized by: including leading truck, lead screw, test walking beam and force sensor, sliding connection about the test walking beam in the leading truck, the both ends of lead screw with the leading truck rotates to be connected, the lead screw still with test walking beam threaded connection, force sensor with test walking beam fixed connection.

2. The discrimination threshold test mechanism of claim 1 wherein: the guide frame is provided with a guide rod, and the test moving beam is connected with the guide rod in a sliding mode.

3. The discrimination threshold test mechanism of claim 1 wherein: the machine body of the servo motor is fixedly connected with the guide frame, and an output shaft of the servo motor is in transmission connection with the lead screw.

4. The discrimination threshold test mechanism of claim 1 wherein: still include the weight connecting piece, the weight connecting piece has and keeps off the ring, the weight connecting piece passes force sensor and sliding connection, keep off the ring and be located force sensor's below.

5. The discrimination threshold test mechanism of claim 4 wherein: the weight connecting piece is fixedly connected with the weight connecting piece, and the ball-end pull rod is positioned above the force sensor.