A force sensor with status indication function

Abstract

The utility model discloses a force sensor with a status indication function, including a sensor elastic body, an electronic compartment is provided on the outer surface of the sensor elastic body, a circuit board is provided in the electronic compartment, a status indication control circuit is provided on the circuit board, a status indicator light is provided outside the electronic compartment, and the status indicator light is connected to the status indication control circuit. The utility model discloses a force sensor with a status indication function, wherein the status indicator light is designed and installed on the force sensor body, and the status indicator light is controlled by the control circuit in the sensor electronic compartment, and the current status of the force sensor can be displayed in real time, including whether it is powered on, whether it is working normally, whether it is fully loaded, whether it is overloaded, etc. Compared with the traditional solution of external display instrument or status indicator light, the cost is lower, and the installation structure and wiring become simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a force sensor with a state indication function. Background Art

[0002] Existing force sensors do not have a status indication function on the body, and the status of the sensor can only be indicated through external indicator lights, display instruments, etc. The sensor status includes whether the sensor is powered on, whether it is working normally, whether it is fully loaded, whether it is overloaded, etc.

[0003] Some application scenarios require real-time understanding of the working status of the force sensor. However, existing technologies on the market can only display the above status through external instruments, indicator lights, etc., which have high external costs, complex systems, and are not conducive to installation. Utility Model Content

[0004] Therefore, one purpose of the present invention is to provide a force sensor with a state indication function to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A force sensor with a status indication function comprises a sensor elastomer, an electronic compartment is provided on the outer surface of the sensor elastomer, a circuit board is provided in the electronic compartment, a status indication control circuit is provided on the circuit board, a status indicator light is provided outside the electronic compartment, and the status indicator light is connected to the status indication control circuit.

[0007] Furthermore, the status indication control circuit includes a control chip U1, and there are three status indicator lights, namely a first status indicator light, a second status indicator light and a third status indicator light. The first constant current source pin of the control chip U1 is connected to the first status indicator light, the second constant current source pin of the control chip U1 is connected to the second status indicator light, and the filter pin of the control chip U1 is connected to the third status indicator light.

[0008] Furthermore, the sensor elastomer includes a force-bearing part and a strain part, the force-bearing part is connected to the strain part, the strain part is provided with a strain bin, a Wheatstone bridge detection circuit is provided in the strain bin, the Wheatstone bridge detection circuit includes a plurality of resistance strain gauges, and the resistance strain gauges are pasted on the inner surface of the strain bin.

[0009] Furthermore, a first wire passing hole and a second wire passing hole are provided in the sensor elastic body, the first wire passing hole is connected to the second wire passing hole, one end of the first wire passing hole is connected to the electronic compartment, and one end of the second wire passing hole is connected to the strain compartment.

[0010] Furthermore, the force sensor also includes a plug, which is arranged on the electronic compartment, one end of the plug is connected to the status indication control circuit and the Wheatstone bridge detection circuit, and the other end of the plug is used to connect an external cable.

[0011] Furthermore, the force-bearing portion and the strain portion are both cylindrical with openings at both ends, the inner diameters of the force-bearing portion and the strain portion are equal, and the outer diameter of the force-bearing portion is greater than the outer diameter of the strain portion.

[0012] Furthermore, the axis of the force-bearing portion and the axis of the strain portion are located on the same straight line, and the force-bearing portion and the strain portion are integrated.

[0013] Furthermore, the force sensor also includes a fixing ring, which is connected to the strain portion and is arranged on a side surface of the strain portion.

[0014] Therefore, the utility model has the following beneficial effects:

[0015] The utility model discloses a force sensor with a status indication function, in which a status indicator light is designed and installed on the force sensor body. The status indicator light is controlled by a control circuit in an electronic compartment of the sensor, and the current status of the force sensor can be displayed in real time, including whether it is powered on, whether it is working normally, whether it is fully loaded, whether it is overloaded, etc. Compared with the traditional external display instrument or status indicator light solution, the cost is lower, and the installation structure and wiring become simpler.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a schematic diagram of the overall structure of the force sensor of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the force sensor of the utility model after removing the compartment cover;

[0020] Figure 3 It is a front view of the force sensor of the utility model;

[0021] Figure 4 It is a top view of the force sensor of the utility model;

[0022] Figure 5yes Figure 4 AA section view shown;

[0023] Figure 6 It is a principle diagram of a status indication control circuit of the utility model.

[0024] In the figure: 1. sensor elastomer; 2. electronic compartment; 3. first status indicator light; 4. second status indicator light; 5. third status indicator light; 6. force-bearing part; 7. strain part; 8. fixing ring; 9. strain compartment; 10. compartment cover; 11. plug; 12. first wire hole; 13. second wire hole. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1 and Figure 2 As shown, a force sensor with a status indication function includes a sensor elastomer 1, an electronic compartment 2 is provided on the outer surface of the sensor elastomer 1, a circuit board is provided inside the electronic compartment 2, a status indication control circuit is provided on the circuit board, a status indicator light is provided outside the electronic compartment 2, and the status indicator light is connected to the status indication control circuit.

[0028] The utility model discloses a force sensor with a status indication function, in which a status indicator light is designed and installed on the force sensor body. The status indicator light is controlled by a control circuit in the sensor electronic compartment 2, and the current status of the force sensor can be displayed in real time, including whether it is powered on, whether it is working normally, whether it is fully loaded, whether it is overloaded, etc. Compared with the traditional external display instrument or status indicator light solution, the cost is lower, and the installation structure, wiring, etc. become simpler.

[0029] like Figure 6 As shown, the status indication control circuit includes a control chip U1, such as Figure 2 , Figure 3As shown, there are three status indicator lights, namely the first status indicator light 3, the second status indicator light 4 and the third status indicator light 5. The first constant current source pin of the control chip U1 is connected to the first status indicator light 3, the second constant current source pin of the control chip U1 is connected to the second status indicator light 4, and the filter pin of the control chip U1 is connected to the third status indicator light 5.

[0030] In this embodiment, the state indication control circuit of the utility model is described in detail. Figure 6As shown, the status indication control circuit includes a control chip U1, a bidirectional voltage regulator diode D5, an inductor L1, an inductor L2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a segment R1, a resistor R2, a resistor R3, a resistor R11, a diode D1, a voltage regulator diode ZD3, and a field effect transistor Q1. The model of the control chip U1 is specifically NSA2860. The VGATE pin of the control chip U1 is connected to the gate of the field effect transistor Q1, the AVDD pin of the control chip U1 is connected to the source of the field effect transistor Q1, and the control chip The VREFP pin of U1 is connected to the external reference voltage source VREFP, the GND pin of the control chip U1 is grounded, the VIP pin of the control chip U1 is connected to one end of the capacitor C5, one end of the capacitor C6, and one end of the resistor R1 respectively, the other end of the capacitor C5 is grounded, the other end of the resistor R1 is connected to the external analog input positive terminal, the VIN pin of the control chip U1 is connected to the other end of the capacitor C6, one end of the capacitor C7, and one end of the resistor R11 respectively, the other end of the capacitor C7 is grounded, the other end of the resistor R11 is connected to the external analog input negative terminal, the IEXC1 pin (the first constant current source pin) of the control chip U1 is connected to LED1 (the first state indicator) Light 3), the IEXC2 pin (the second constant current source pin) of the control chip U1 is connected to LED2 (the second status indicator light 4), the Filter pin (filter pin) of the control chip U1 is connected to LED3 (the third status indicator light 5), the FBN pin of the control chip U1 is connected to one end of the capacitor C4 and one end of the inductor L2 through the resistor R3, the other end of the capacitor C4 is grounded, the OUT pin of the control chip U1 is short-circuited with the OWI pin, the OWI pin of the control chip U1 is connected to one end of the capacitor C4 and one end of the inductor L2 through the resistor R2, the other end of the inductor L2 outputs the VOUT voltage, and the DVD of the control chip U1 The D pin is grounded via capacitor C3, the drain of field effect transistor Q1 is connected to one end of capacitor C1 and the negative terminal of diode C1 respectively, the other end of capacitor C1 is grounded, the positive terminal of diode C1 is connected to one end of inductor L1 and one end of capacitor C10 respectively, the other end of capacitor C10 is grounded via capacitor C9, the other end of inductor L1 is connected to VCC power supply, one end of bidirectional zener diode D5 is connected to VCC power supply, the other end of bidirectional zener diode D5 is grounded, the positive terminal of zener diode ZD3 is grounded, the negative terminal of zener diode ZD3 is connected to the source of field effect transistor Q1, and capacitors C2 and C8 are both connected in parallel with zener diode ZD3.

[0031] The utility model is to design and install the status indicator light on the force sensor body, and realize the control of the status indicator light through the control circuit in the sensor. The status of the sensor includes whether the sensor is powered on, whether it is working normally, whether it is fully loaded, whether it is overloaded, etc. The above status is reflected by the different flashing frequencies of the indicator light.

[0032] The status indicated by the status indicator light of the utility model is not limited to the above content, and can be selectively set according to the specific application scenario of the force sensor. For example, it can also be used to indicate whether the working environment temperature of the force sensor is within a specified range, whether the force sensor is impacted, etc.

[0033] As an implementation manner, the first status indicator light 3 is a power-on status indicator light, which is red when powered on and not lit when not powered on.

[0034] As an implementation manner, the second status indicator light 4 is a fault indicator light: solid green means no fault, slow flashing means open circuit, and fast flashing means short circuit.

[0035] As an implementation manner, the third status indicator light 5 is a load indicator light: solid green for not fully loaded, slow flashing for fully loaded, and fast flashing for overloaded.

[0036] like Figure 2 As shown, the sensor elastomer 1 includes a force-bearing part 6 and a strain part 7. The force-bearing part 6 is connected to the strain part 7. The strain part 7 is provided with a strain bin 9. A Wheatstone bridge detection circuit is provided in the strain bin 9. The Wheatstone bridge detection circuit includes a plurality of resistance strain gauges. The resistance strain gauges are pasted on the inner surface of the strain bin 9.

[0037] When in use, the sensor is installed and connected to the assembly, and the force to be detected acts on the force-bearing part 6 of the sensor elastomer 1. The force-bearing part 6 transmits the force to the strain part 7 of the sensor elastomer 1, causing the strain part 7 to deform. The resistive strain gauge in the strain bin 9 detects the strain of the sensor elastomer 1 and converts it into resistance change, which is then converted into the magnitude of the measured force.

[0038] As an implementation method, the Wheatstone bridge detection circuit includes a plurality of resistors, a plurality of resistive strain gauges, a transmitter, a protection board, a housing shielding terminal, etc., which together constitute the Wheatstone bridge detection circuit. The Wheatstone bridge detection circuit belongs to the existing mature technology and will not be described in detail here.

[0039] The utility model does not impose any specific restriction on the number of resistance strain gauges, and the number of resistance strain gauges can be set according to the actual detection and stress conditions of the sensor.

[0040] In one embodiment, there are two resistance strain gauges, and the two resistance strain gauges are respectively arranged on two opposite sides of the inner surface of the strain bin 9 .

[0041] In one embodiment, there may be four resistance strain gauges, and the four resistance strain gauges are respectively arranged on the front, back, left and right sides of the inner surface of the strain bin 9 that are opposite to each other.

[0042] like Figure 5As shown, a first wire passing hole 12 and a second wire passing hole 13 are provided in the sensor elastic body 1, the first wire passing hole 12 is connected to the second wire passing hole 13, one end of the first wire passing hole 12 is connected to the electronic compartment 2, and one end of the second wire passing hole 13 is connected to the strain compartment 9.

[0043] The first wire hole 12 and the second wire hole 13 connect the strain bin 9 and the electronic bin 2, so that the connection wire or signal wire of the strain bin 9 can enter the electronic bin 2 through the second wire hole 13 and the first wire hole 12, and be connected to the status indication control circuit on the circuit board of the electronic bin 2, and be connected to the plug 11, and the relevant signals inside the force sensor are output through the plug 11 and the external cable vector.

[0044] like Figure 1-Figure 5 As shown, the force sensor also includes a plug 11, which is arranged on the electronic compartment 2, one end of the plug 11 is connected to the status indication control circuit and the Wheatstone bridge detection circuit, and the other end of the plug 11 is used to connect an external cable.

[0045] As an embodiment, the plug 11 is a waterproof plug, more specifically, a M12A1 type 12-core waterproof aviation plug. The M12A1 type 12-core waterproof aviation plug outputs a collection signal as an output end of a Wheatstone bridge detection circuit and / or a status indication control circuit.

[0046] like Figure 2 and Figure 4 As shown, the force-bearing part 6 and the strain part 7 of the sensor elastic body 1 are both cylindrical with openings at both ends. The inner diameters of the force-bearing part 6 and the strain part 7 are equal, and the outer diameter of the force-bearing part 6 is larger than the outer diameter of the strain part 7.

[0047] The strain bin 9 is arranged inside the strain part 7 of the sensor elastic body 1, and the strain bin 9 is annular in shape, and a bin cover 10 is arranged at the opening of the strain bin 9. The resistance strain gauge is arranged in the strain bin 9. The bin cover 10 and the opening of the strain bin 9 can be connected by a card joint or a thread.

[0048] like Figure 4 As shown, the axis of the force-bearing portion 6 and the axis of the strain portion 7 are located on the same straight line, and the force-bearing portion 6 and the strain portion 7 are integrated, that is, the force-bearing portion 6 and the strain portion 7 are integrally formed.

[0049] like Figure 1 , Figure 2 and Figure 3 As shown, the force sensor further includes a fixing ring 8 , which is connected to the strain portion 7 of the sensor elastic body 1 , and is disposed on a side of the strain portion 7 .

[0050] The difference between the utility model and the traditional force sensor is that an indicator light for state detection is added to the body of the sensor, and the indicated state of the indicator light is controlled by a control circuit in the sensor.

[0051] The utility model can display the current status of the force sensor in real time, including whether it is powered on, whether it is working normally, whether it is fully loaded, and whether it is overloaded. Compared with traditional solutions (external display instruments or status indicator lights), the cost is lower, and the installation structure and wiring are simpler.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] It is not difficult for those skilled in the art to understand that the utility model includes any combination of the utility model content and the specific implementation method part of the above specification and the various parts shown in the drawings. Due to the limited space and to make the specification concise, the various schemes composed of these combinations are not described one by one. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0054] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A force sensor with a state indication function, characterized in that: It comprises a sensor elastic body, the outer surface of the sensor elastic body is provided with an electronic compartment, a circuit board is provided in the electronic compartment, a status indication control circuit is provided on the circuit board, a status indicator light is provided outside the electronic compartment, and the status indicator light is connected to the status indication control circuit; The status indication control circuit includes a control chip U1, and there are three status indicator lights, namely a first status indicator light, a second status indicator light and a third status indicator light. The first constant current source pin of the control chip U1 is connected to the first status indicator light, the second constant current source pin of the control chip U1 is connected to the second status indicator light, and the filter pin of the control chip U1 is connected to the third status indicator light.

2. A force sensor with a state indication function according to claim 1, characterized in that: The sensor elastomer includes a force-bearing part and a strain part, the force-bearing part is connected to the strain part, the strain part is provided with a strain bin, a Wheatstone bridge detection circuit is provided in the strain bin, the Wheatstone bridge detection circuit includes a plurality of resistance strain gauges, and the resistance strain gauges are pasted on the inner surface of the strain bin.

3. A force sensor with a state indication function according to claim 2, characterized in that: The sensor elastic body is provided with a first wire passing hole and a second wire passing hole, the first wire passing hole is connected to the second wire passing hole, one end of the first wire passing hole is connected to the electronic compartment, and one end of the second wire passing hole is connected to the strain compartment.

4. A force sensor with a state indication function according to claim 2 or 3, characterized in that: It also includes a plug, which is arranged on the electronic compartment, one end of the plug is connected to the status indication control circuit and the Wheatstone bridge detection circuit, and the other end of the plug is used to connect an external cable.

5. The force sensor with state indication function according to claim 2, characterized in that: The force-bearing portion and the strain portion are both cylindrical with openings at both ends. The inner diameters of the force-bearing portion and the strain portion are equal, and the outer diameter of the force-bearing portion is greater than the outer diameter of the strain portion.

6. A force sensor with a state indication function according to claim 5, characterized in that: The axis of the force-bearing portion and the axis of the strain portion are located on the same straight line, and the force-bearing portion and the strain portion are integrated.

7. A force sensor with a state indication function according to claim 2 or 5, characterized in that: It also includes a fixing ring, which is connected to the strain part and is arranged on the side of the strain part.

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