CN108680073A - A kind of disassembled vernier caliper and its installation method - Google Patents

Abstract

The application discloses a detachable vernier caliper, which includes N sections of scale parts, N is greater than or equal to 2, a detachable connecting part and a detection circuit; the connecting part includes: a connecting body, used to connect the parts to be connected; Two adjacent scale parts; adjusting bolts, used to adjust the degree of tightness between the connecting body and the parts to be connected; strain gauges located on the surface of the connecting body, whose deformation direction is related to the degree of tightness; detection circuits, used to detect the degree of tightness of the strain gauges resistance value, and output the judgment result of whether the resistance value reaches the preset resistance value. In the present invention, the detection circuit is used to adjust the strain gage to the preset resistance value, in fact, the connecting parts are adjusted to the preset degree of tightness, which ensures that the deformation of the connecting parts is consistent each time, so that the vernier caliper can be disassembled. Higher accuracy can be ensured when two or more scale parts are connected to increase the measuring range. The application also discloses a method for installing the detachable vernier caliper.

Description

A detachable vernier caliper and its installation method

technical field

The invention relates to the technical field of measuring tools, in particular to a detachable vernier caliper and an installation method thereof.

Background technique

A vernier caliper is a measuring tool for measuring length, inner and outer diameters, and depth. It is mainly composed of a main ruler and a sliding vernier attached to the main ruler. Vernier calipers have high precision in measurement and are widely used in precision measurement, but traditional vernier calipers cannot be disassembled, so that when a part of the vernier caliper is damaged, it cannot continue to be used, and some large-capacity vernier calipers are larger in size Large, not convenient enough for storage and carrying.

In order to solve the above problems, a detachable vernier caliper has been proposed. This vernier caliper is divided into two or more pieces when it is stored or carried. When it is used, the mechanical card slot structure on the parts is used to combine and install these parts into one. After completing the vernier caliper, use it according to the original usage of the vernier caliper.

However, due to the fact that the accuracy of the mechanical card slot cannot be accurately controlled during production, different installation errors may occur in each installation, and deformation may occur during installation or disassembly, resulting in measurement errors in the vernier caliper originally used for accurate measurement, putting the cart before the horse and destroying the The most basic function of a vernier caliper.

Therefore, how to provide a solution to the above technical problems is a problem that those skilled in the art need to solve.

Contents of the invention

In view of this, the object of the present invention is to provide a detachable vernier caliper and its installation method. In the present invention, the detachable vernier caliper has higher precision and larger measuring range after being installed. The specific plan is as follows:

A detachable vernier caliper, including N-segment scale parts, wherein N is greater than or equal to 2, detachable connecting parts and detection circuits;

The connecting parts include:

A connecting body, used to connect the parts to be connected; the parts to be connected include two adjacent sections of the ruler;

adjusting bolts, used to adjust the degree of tightness between the connecting body and the parts to be connected;

Strain gauges located on the surface of the connecting body whose deformation direction is related to the degree of tightness;

The detection circuit is used to detect the resistance value of the strain gauge, and output a judgment result of whether the resistance value reaches a preset resistance value.

Preferably, the detection circuit includes:

A resistance measuring circuit for detecting the resistance value of the strain gauge;

A logic circuit that outputs a judgment result of whether the resistance value of the strain gauge reaches the preset resistance value.

Preferably, the resistance measuring circuit includes: a first resistor, a second resistor, a third resistor, a first diode and a second diode;

Wherein, the first end of the first resistor is respectively connected to the first end of the strain gauge, the anode of the first diode, and the cathode of the second diode; the first end of the second resistor One end is respectively connected to the first end of the third resistor, the cathode of the first diode, and the anode of the second diode; the second end of the strain gauge is connected to the second end of the second resistor After the second end is connected, it is used as the first end of the detection circuit; the second end of the first resistor is connected with the second end of the third resistor as the second end of the detection circuit; The first terminal is grounded or connected to a DC power supply, and the second terminal of the detection circuit is connected to a DC power supply or grounded;

A ratio of the preset resistance to a resistance of the first resistor is equal to a ratio of a resistance of the second resistor to a resistance of the third resistor.

Preferably, the logic circuit is specifically used for:

When neither the first diode nor the second diode is conducting, a judgment result that the resistance of the strain gauge reaches a preset resistance is output.

Preferably, the resistance measuring circuit includes a preset voltage power supply and an ammeter.

Preferably, the detection circuit also includes:

A display lamp and/or a buzzer connected with the logic circuit.

Preferably, the N segments of the scale component are two segments of the scale component.

Preferably, the measuring range of the detachable vernier caliper is not more than 1 meter.

Correspondingly, the present invention also discloses a method for installing a detachable vernier caliper, which is applied to the detachable vernier caliper described in any one of the above, including:

Connect the parts to be connected through the connecting body;

Adjust the bolt until the judgment result output by the detection circuit is that the resistance of the strain gauge reaches the preset resistance.

The invention discloses a detachable vernier caliper, which comprises N sections of scale parts, wherein N is greater than or equal to 2, a detachable connecting part and a detection circuit; the connecting part includes: a connecting main body, used for connecting parts to be connected; The parts to be connected include two adjacent sections of the scale part; adjusting bolts are used to adjust the degree of tightness between the connecting body and the parts to be connected; the deformation direction on the surface of the connecting body is related to the degree of tightness The strain gauge; the detection circuit is used to detect the resistance value of the strain gauge, and output the judgment result of whether the resistance value reaches the preset resistance value. In the present invention, the detection circuit is used to adjust the strain gage to the preset resistance value, in fact, the connecting parts are adjusted to the preset degree of tightness, which ensures that the deformation of the connecting parts is consistent each time, so that the vernier caliper can be disassembled. Higher accuracy can be ensured when two or more scale parts are connected to increase the measuring range.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a schematic structural view of a detachable vernier caliper in an embodiment of the present invention;

Fig. 2 is a partial schematic diagram of a specific connection part in an embodiment of the present invention;

3 is an overall schematic diagram of a detachable vernier caliper in an embodiment of the present invention;

4 is a circuit topology diagram of a specific resistance measuring circuit in an embodiment of the present invention;

Fig. 5 is a flowchart of steps of a method for installing a detachable vernier caliper in an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The embodiment of the present invention discloses a detachable vernier caliper, as shown in Fig. 1, including N sections of scale parts, where N is greater than or equal to 2, a detachable connecting part 2 and a detection circuit 3;

In fact, on a detachable vernier caliper, when there are N segments of scale parts to be connected, there should be N-1 corresponding connecting parts.

However, considering that the greater the number of scale components, the greater the error in connection, generally the N segments of the scale components are selected as the two segments of the scale components. Moreover, due to the rigidity limitation of the scale parts, if the length of the scale parts after being connected is too long, certain bending will occur, so the measuring range is also limited. Usually, the measuring range of the detachable vernier caliper is set to be no more than 1 meter.

The connecting part 2 includes:

The connecting body 21 is used to connect the parts to be connected; the parts to be connected include two adjacent sections of the scale parts 1a and 1b, where 1≤a≤b≤N;

Specifically, the connection body 21 may be a separate component independent of the components to be connected, or may be a part of the connection end of the scale component 1 a or 1 b located on the components to be connected. The most commonly used connecting body is in the form of a buckle. The partial schematic diagram of the corresponding connecting part 2 is shown in FIG. 2 . In contrast, the overall schematic diagram of the detachable vernier caliper is shown in FIG. 3 .

Adjusting bolts 22, used to adjust the degree of tightness between the connecting body 21 and the parts to be connected;

It can be understood that tightening or loosening the adjusting bolt 22 is a common means for adjusting the degree of tightness.

Strain gauges 23 located on the surface of the connecting body 21, the deformation direction of which is related to the degree of tightness;

The strain gauge 23 has a strain effect. Specifically, when a conductor or semiconductor material undergoes mechanical deformation under the action of an external force, its resistance value changes accordingly. This phenomenon is called "strain effect". In this embodiment, the deformation of the strain gauge 23 is related to the deformation direction of the connecting body 21. When the parts to be connected are connected each time, if the degree of deformation of the strain gauge 23 is always the same, the degree of tightness between the parts to be connected and the connecting body 21 It is always the same, so it can be considered that in this embodiment, the complete detachable vernier caliper is installed from the parts every time, and the degree of deformation does not change. The same measurement object is measured after different installations, and the measurement results are the same. The measurement results with higher accuracy.

The detection circuit 3 is used to detect the resistance value of the strain gauge 23 and output a judgment result of whether the resistance value reaches a preset resistance value.

Wherein, the preset resistance value determines the degree of tightness of the adjusting bolt 22 after adjustment. The preset resistance value can be determined as any value within the changing resistance value range of the strain gauge 23, as long as the preset resistance value is determined, the installation and removal of the parts of the detachable vernier caliper in this embodiment will not lead to detachable The deformation of the vernier caliper eliminates the inaccurate factor of the deformation of the vernier caliper during the disassembly and installation of the parts, making the detachable vernier caliper easy to disassemble and carry, while ensuring the accuracy of repeated disassembly and assembly.

The preset resistance value can also be the resistance value of the strain gauge 23 corresponding to the ideal degree of tightness of the adjusting bolt 22 obtained after comparing the detachable vernier caliper in this embodiment with the integrated standard vernier caliper of the same range. Adjusting and installing according to the preset resistance value obtained by this method, the accuracy of the finally obtained detachable vernier caliper is infinitely close to that of the standard vernier caliper, and the measurement result is more accurate.

The embodiment of the present invention discloses a detachable vernier caliper, which includes N sections of scale parts, wherein N is greater than or equal to 2, a detachable connecting part and a detection circuit; the connecting part includes: a connecting body for connecting the parts to be connected ; The parts to be connected include two adjacent sections of the scale part; Adjusting bolts, used to adjust the degree of tightness between the connecting body and the parts to be connected; Degree-related strain gauges; the detection circuit is used to detect the resistance value of the strain gauges, and output a judgment result of whether the resistance value reaches a preset resistance value. In the present invention, the detection circuit is used to adjust the strain gage to the preset resistance value, in fact, the connecting parts are adjusted to the preset degree of tightness, which ensures that the deformation of the connecting parts is consistent each time, so that the vernier caliper can be disassembled. Higher accuracy can be ensured when two or more scale parts are connected to increase the measuring range.

The embodiment of the present invention discloses a specific detachable vernier caliper. Compared with the previous embodiment, this embodiment further explains and optimizes the technical solution. specific:

The detection circuit 3 includes:

A resistance measuring circuit 31 for detecting the resistance value of the strain gauge 23;

A logic circuit 32 that outputs a judgment result of whether the resistance of the strain gauge 23 reaches the preset resistance.

Further, the detection circuit 3 may also include:

A display lamp and/or a buzzer connected to the logic circuit 32 .

It can be understood that when the logic circuit 32 outputs the judgment result, the display lamp and/or the buzzer outputs a corresponding state change. For example, when the judgment result is yes, the display light is on and the buzzer beeps. This shows that the adjustment bolt 22 has been adjusted in place.

Specifically, the resistance measuring circuit 31 may include a preset voltage power supply and an ammeter, and the resistance of the strain gauge 23 can be calculated through the preset voltage power supply and the ammeter.

In view of the cumbersome process of calculating the resistance using a preset voltage power supply and an ammeter, another resistance measuring circuit 31 is designed in this embodiment, as shown in FIG. Resistor R2, third resistor R3, first diode D1 and second diode D2;

Wherein, the first end of the first resistor R1 is respectively connected to the first end of the strain gauge 23, the anode of the first diode D1, and the cathode of the second diode D2; The first end of the second resistor R2 is respectively connected to the first end of the third resistor R3, the cathode of the first diode D1, and the anode of the second diode D2; the first end of the strain gauge 23 The two ends are connected to the second end of the second resistor R2 as the first end of the detection circuit; the second end of the first resistor R1 is connected to the second end of the third resistor R3 as the first end of the detection circuit. The second end of the detection circuit; the first end of the detection circuit is grounded or connected to a DC power supply, and the second end of the detection circuit is connected to a DC power supply or grounded;

The ratio of the preset resistance to the resistance of the first resistor R1 is equal to the ratio of the resistance of the second resistor R2 to the resistance of the third resistor R3.

It can be understood that the strain gauge 23 in the circuit of Fig. 4 should be regarded as a variable resistor. According to the preset resistance value ratio in the previous paragraph, when the resistance value of the strain gauge 23 is just the preset resistance value, it will reach When the bridge is balanced, the voltage difference across the first diode D1 and the second diode D2 is zero, so the two diodes are not turned on and do not emit light; when the resistance value of the strain gauge 23 is greater than or less than the preset resistance value, the first diode D1 or the second diode D2 will light up accordingly, thereby prompting the user to make corresponding adjustments to the adjusting bolt 22 .

Further, the adjustment direction of the adjustment bolt 22 can be indicated by distinguishing the light-emitting color or marking position of the first diode D1 and the second diode D2 , which is convenient for the user to have a clearer adjustment direction.

At this time, the first diode D1 and the second diode D2 can be regarded as the logic circuit 32, and the logic circuit 32 can also be further provided, specifically for:

When neither the first diode D1 nor the second diode D2 is turned on, a judgment result that the resistance of the strain gauge reaches a preset resistance is output.

Correspondingly, the embodiment of the present invention also discloses a method for installing a detachable vernier caliper, which is applied to the detachable vernier caliper described in any one of the above, as shown in Figure 5, including:

S1: Connect the parts to be connected through the connecting body;

S2: Adjust the bolt until the judgment result output by the detection circuit is that the resistance value of the strain gauge reaches the preset resistance value.

By using the installation method in this embodiment, the detachable vernier caliper can be installed as a vernier caliper with constant range and precision, and accurate measurement results can be obtained.

Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

A detachable vernier caliper provided by the present invention and its installation method have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the present invention. The method of the invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be understood To limit the present invention.

Claims (9)

1. a kind of disassembled vernier caliper, which is characterized in that including N sections of scale members, wherein N is more than or equal to 2, removable company Relay part and detection circuit；

The connecting component includes：

Main body is connected, connecting component is waited for for connecting；It is described to wait for that connecting component includes two sections of adjacent scale members；

Adjustment bolt, for adjusting the connection main body and the tightness waited between connecting component；

Positioned at the connection body surfaces, deformation direction and the relevant foil gauge of the tightness；

The detection circuit, the resistance value for detecting the foil gauge, and export whether the resistance value reaches sentencing for preset resistive value Disconnected result.

2. disassembled vernier caliper according to claim 1, which is characterized in that the detection circuit includes：

Survey resistance circuit for the resistance value for detecting the foil gauge；

Export the foil gauge resistance value whether reach the preset resistive value judging result logic circuit.

3. disassembled vernier caliper according to claim 2, which is characterized in that the survey resistance circuit includes：First resistor, Two resistance, 3rd resistor, the first diode and the second diode；

Wherein, the first end of the first resistor respectively with the first end of the foil gauge, the anode of first diode, institute The cathode for stating the second diode is connected；The first end of the second resistance respectively with the first end of the 3rd resistor, described The cathode of one diode, the anode of second diode are connected；The of the second end of the foil gauge and the second resistance First end after two ends are connected as the detection circuit；The second end of the second end of the first resistor and the 3rd resistor The second end being connected as the detection circuit；The first end of the detection circuit is grounded or connects DC power supply, the detection electricity The second termination DC power supply on road or ground connection；

The ratio of the preset resistive value and the resistance value of the first resistor is equal to the resistance value of the second resistance and the 3rd resistor Resistance value ratio.

4. disassembled vernier caliper according to claim 3, which is characterized in that the logic circuit is specifically used for：

When first diode and second diode do not turn on, the resistance value for exporting the foil gauge reaches pre- handicapping The judging result of value.

5. disassembled vernier caliper according to claim 2, which is characterized in that the survey resistance circuit includes predeterminated voltage power supply And ammeter.

6. according to any one of claim 2 to the 5 disassembled vernier caliper, which is characterized in that the detection circuit further includes：

The display lamp and/or buzzer being connected with the logic circuit.

7. according to any one of claim 1 to the 5 disassembled vernier caliper, which is characterized in that

The N sections of scale member is two sections of scale members.

8. disassembled vernier caliper according to claim 7, which is characterized in that the range of the disassembled vernier caliper does not surpass Cross 1 meter.

9. a kind of installation method of disassembled vernier caliper, which is characterized in that be applied to as described in any one of claim 1 to 8 Disassembled vernier caliper, including：

Connecting component is waited for by connecting main body connection；

Adjustment bolt is until the resistance value that the judging result of detection circuit output is foil gauge reaches preset resistive value.