JP7048458B2 - Battery voltage drop confirmation method for tongue pressure measuring device and tongue pressure measuring device - Google Patents

Description

The present invention relates to a control circuit, an apparatus, and a method for confirming a battery voltage drop by a control circuit.

A control circuit for controlling the drive of a solenoid valve, a pump, or the like using a primary battery such as an alkaline dry battery as a power source, and a device provided with the control circuit are known. In this device, an alarm may be issued when the battery voltage drops below a predetermined value as the battery is exhausted.

When an alkaline battery or the like is exhausted, it is possible that the internal resistance of the battery increases even if the electromotive force is constant. The internal resistance of the battery is not specified in the specifications and varies depending on the manufacturer and type. When the current consumption of the device is large, the voltage drop becomes large due to the internal resistance of the battery and the load of the solenoid valve, the pump, and the like. If the voltage becomes smaller than the operating voltage of the device due to this voltage drop, the control circuit that controls the drive of the load may operate abnormally.
In order to avoid abnormal operation, it is conceivable to increase the setting for detecting a decrease in battery voltage, but this shortens the product life per battery and requires frequent battery replacement.

Therefore, it is known to detect a decrease in battery voltage by paying attention to the internal resistance of the battery (for example, Patent Document 1).
In the device of Patent Document 1, a step of measuring the internal resistance of the battery, a step of multiplying the measured internal resistance by a preset lower limit current to calculate the battery voltage drop due to the internal resistance, and a step based on the calculated voltage drop. Then, the step of acquiring the lower limit open voltage value of the battery capacity, the relationship table between the open circuit voltage value and the battery charge state are created, and the lower limit value is acquired based on the relationship table between the open circuit voltage value and the battery charge state. The battery health state can be estimated based on the internal resistance of the battery by the step and the step of acquiring the battery health state value by the relational expression between the battery charge state and the lower limit value of the battery charge state.

Japanese Unexamined Patent Publication No. 2015-197435

However, in the device of Patent Document 1, it is necessary to measure the internal resistance of the battery itself in order to estimate the health state of the battery, so that a mechanism for measurement is required and the structure of the device is complicated. There is.
An object of the present invention is to provide a battery voltage drop confirmation method by a control circuit, an apparatus, and a control circuit capable of detecting an abnormality of a voltage drop due to an internal resistance of a battery with a simple structure.

The tongue pressure measuring device of the present invention is provided with an elastic balloon having a restoring force, a flow path connected to the elastic balloon, a pump for supplying air to the flow path, and the pump and the said. An electromagnetic valve that opens and closes the connection with the elastic balloon, a pressure sensor that is connected to the elastic balloon via the flow path and detects a voltage fluctuation due to deformation of the elastic balloon, and a pump, the electromagnetic valve, and the like. The control circuit includes a control circuit for controlling the operation of the pressure sensor, a case for accommodating the pump, the pressure sensor, the control circuit, the electromagnetic valve, and the battery, and the control circuit is the electromagnetic valve which is a load . A storage unit that previously stores the relationship between the permissible allowable voltage drop ΔVt as the voltage drop due to the internal resistance of the battery that can be used to drive the battery and the open circuit voltage Vin1 of the battery in the unloaded state. , A calculation unit that calculates the difference between the open circuit voltage Vin1 and the terminal voltage Vin2 of the battery under the load as an actual voltage drop ΔVn, and an actual voltage drop ΔVn in the open circuit voltage Vin1 calculated by the calculation unit. When the actual voltage drop ΔVn exceeds the allowable voltage drop ΔVt as a result of comparison between the comparison unit and the comparison unit that compares the allowable voltage drop ΔVt in the open circuit voltage Vin1 stored in the storage unit. It has an alarm unit that outputs an alarm signal, and is characterized by including a control unit configured to be able to measure the open circuit voltage Vin1 and the terminal voltage Vin2.

In the present invention, the load means a solenoid valve that requires a large drive current.
In the present invention, an allowable allowable voltage drop ΔVt as a voltage drop due to the internal resistance of the battery is tabulated for each open circuit voltage Vin1 and stored in the storage unit in advance. In the calculation unit, the open circuit voltage Vin1 in the state where the battery actually used is not loaded, that is, the state in which the drive current is not supplied to the load, and the state in which the load is applied, that is, the drive current is applied to the load. The difference from the terminal voltage Vin2 in the supplied state is calculated as the actual voltage drop ΔVn. This actual voltage drop ΔVn is the voltage drop due to the actual internal resistance of the battery. The comparison unit compares the allowable voltage drop ΔVt and the actual voltage drop ΔVn at the open circuit voltage Vin1 based on the data from the storage unit and the data from the calculation unit, and as a result, if ΔVt <ΔVn, the alarm unit Output an alarm signal. That is, when the actual voltage drop ΔVn is larger than the allowable voltage drop ΔVt, it is determined that the internal resistance of the battery has increased, and an alarm signal is output. This makes it possible to avoid abnormal operation of the control circuit due to an increase in the internal resistance of the battery.
As described above, in the present invention, since it is not necessary to directly measure the internal resistance of the battery itself, it is possible to detect an abnormality of the voltage drop due to the internal resistance of the battery with a simple structure.

In the tongue pressure measuring device of the present invention, the battery is preferably a primary battery.
In this configuration, since the battery is a primary battery such as a dry battery, it can be easily obtained. Therefore, when the alarm signal is output from the alarm unit as the internal resistance of the battery increases, the battery can be easily replaced.

The tongue pressure measuring device of the present invention includes a solenoid valve, and the load is the solenoid valve .
In this configuration, the difference between the terminal voltage Vin2 and the open circuit voltage Vin1 when the solenoid valve is driven as a load is calculated as the actual voltage drop ΔVn. Here, since the driving voltage and the driving current when the solenoid valve is driven are stable, the measurement error of the terminal voltage Vin2 of the battery can be reduced. Therefore, it is possible to reliably avoid abnormal operation due to an increase in the internal resistance of the battery.

The tongue pressure measuring device of the present invention includes an elastic balloon having a restoring force, a flow path connected to the elastic balloon having a restoring force, and a pump for supplying air to the flow path .
In this configuration, the above-mentioned control circuit can be applied to a device having an elastic balloon, a flow path and a pump, for example, a tongue pressure measuring device. Therefore, it is possible to prevent the measured value from showing an abnormal value or the tongue pressure measurement from being stopped due to an abnormal operation caused by an increase in the internal resistance of the battery during the measurement of the tongue pressure. can.

The method for confirming the battery voltage drop of the tongue pressure measuring device of the present invention is provided in an elastic balloon having a restoring force, a flow path connected to the elastic balloon, a pump for supplying air to the flow path, and the flow path. An electromagnetic valve that opens and closes the connection between the pump and the elastic balloon, a pressure sensor that is connected to the elastic balloon via the flow path and detects a voltage fluctuation due to deformation of the elastic balloon, and the above. The control circuit comprises a control circuit for controlling the operation of the pump, the electromagnetic valve, and the pressure sensor, and a case for accommodating the pump, the pressure sensor, the control circuit, the electromagnetic valve, and a battery . The relationship between the permissible allowable voltage drop ΔVt as the voltage drop due to the internal resistance of the battery that can be used to drive the electromagnetic valve that is the load and the open circuit voltage Vin1 of the battery in the state where the load is not applied. A calculation unit that calculates the difference between the storage unit that is stored in advance and the terminal voltage Vin2 of the battery in the state where the open circuit voltage Vin1 and the load is applied as the actual voltage drop ΔVn, and the open circuit voltage calculated by the calculation unit. As a result of comparison between the comparison unit for comparing the actual voltage drop ΔVn in Vin1 and the allowable voltage drop ΔVt in the open circuit voltage Vin1 stored in the storage unit, and the comparison unit, the actual voltage drop ΔVn is the allowable voltage drop. A method for confirming a battery voltage drop of a tongue pressure measuring device including an alarm unit that outputs an alarm signal when ΔVt is exceeded, and a control unit configured to be capable of measuring the open circuit voltage Vin1 and the terminal voltage Vin2. The relationship between the allowable voltage drop ΔVt, which is acceptable as the voltage drop due to the internal resistance of the battery that can be used to drive the load, and the open circuit voltage Vin1 of the battery in the state where the load is not applied. In the step of storing in advance in the storage unit, and a step in which the calculation unit calculates the difference between the open circuit voltage Vin1 and the terminal voltage Vin2 of the battery under the load as the actual voltage drop ΔVn. The step of comparing the calculated actual voltage drop ΔVn at the open circuit voltage Vin1 and the allowable voltage drop ΔVt at the open circuit voltage Vin1 stored in the storage unit in the comparison unit, and the result of the comparison. It is characterized by comprising a step of outputting an alarm signal by the alarm unit when the actual voltage drop ΔVn exceeds the allowable voltage drop ΔVt.
In the present invention, the same effect as described above can be obtained.

The schematic which shows the tongue pressure measuring apparatus which concerns on 1st Embodiment of this invention. The block diagram which shows the outline of the apparatus main body of the said embodiment. The block diagram which shows the outline of the circuit structure of the sluice valve of the said embodiment. A flowchart illustrating a process of confirming a decrease in battery voltage due to an increase in internal resistance. The figure which shows the relationship between the permissible voltage drop ΔVt and the open circuit voltage Vin1. The block diagram which shows the outline of the pressure generator which concerns on 2nd Embodiment of this invention.

[First Embodiment]
The first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view showing the tongue pressure measuring device 100 of the present embodiment. The tongue pressure measuring device 100 is a battery-powerable device and is an example of the device of the present invention.
In FIG. 1, the tongue pressure measuring device 100 is a device for measuring the tongue pressure of a user, and includes a device main body 110 and an elastic balloon 120.
The elastic balloon 120 includes a balloon body 121 and a tube 122. The balloon body 121 has a restoring force and can be inserted into the oral cavity. The tip side of the tube 122 is connected to the balloon main body 121, and the proximal end side is connected to the device main body 110, so that the air discharged from the device main body 110 can be introduced into the balloon main body 121.
The tongue pressure measuring device 100 is also used as a tongue pressure strengthening training device.

[Device body]
FIG. 2 is a block diagram showing an outline of the apparatus main body 110.
In FIGS. 1 and 2, the apparatus main body 110 includes a case 111, a display unit 112, an operation unit 113, a buzzer 114, a pressure sensor 115, a pump 116, a sluice valve 117, an exhaust valve 118, and air. It includes a flow path 119, a control circuit 1, and a drive circuit 30.

The case 111 is formed in a box shape. The case 111 houses the display unit 112, the operation unit 113, the buzzer 114, the pressure sensor 115, the pump 116, the sluice valve 117, the exhaust valve 118, the air flow path 119, the control circuit 1, and the like. A battery B that can be used to supply electric power is stored. In the present embodiment, two dry batteries, which are temporary batteries, are stored as the battery B.
Further, in the case 111, the pressure sensor 115, the pump 116, the sluice valve 117 and the exhaust valve 118 are connected by an air flow path 119, and one end portion 119A of the air flow path 119 is connected to the tube 122. That is, the air flow path 119 and the tube 122 form the flow path of the present invention. Further, the other end 119B of the air flow path 119 is open to the outside of the case 111.

The pressure sensor 115 is a pressure sensor that detects fluctuations in air pressure due to deformation of the balloon body 121 in the tongue pressure measuring step of measuring the tongue pressure of the user.
The pump 116 is connected to the balloon body 121 via the tube 122 and the air flow path 119, and pressurizes the balloon body 121 by supplying air to the tube 122 and the air flow path 119.

The sluice valve 117 is a solenoid valve for opening and closing the connection between the pump 116 and the balloon main body 121. In the present embodiment, in the tongue pressure measuring step, the sluice valve 117 is "opened" when the pump 116 is driven, then the pump 116 is stopped, and the balloon body 121 is inserted into the oral cavity to apply tongue pressure. It is "closed" when measuring. That is, the sluice valve 117 is opened and closed in the tongue pressure measuring step.

The exhaust valve 118 is a solenoid valve for opening and closing the connection between the outside of the case 111 and the balloon body 121. In the present embodiment, the exhaust valve 118 is set to "open" when the pressure inside the balloon body 121 is released after the tongue pressure is measured. As a result, the air supplied inside the balloon body 121 is discharged to the outside of the case 111 via the tube 122, the air flow path 119, and the exhaust valve 118. Therefore, the inside of the balloon body 121 is at atmospheric pressure when the tongue pressure measurement is not performed.

The display unit 112 is a liquid crystal display (LCD) that digitally displays the pressure value detected by the pressure sensor 115, and is electrically connected to the control circuit 1.
The operation unit 113 is for operating the control circuit 1. Two operation units 113 are arranged on the front side of the case 111, and each of them is electrically connected to the control circuit 1. By operating the operation unit 113, the user can turn on the power of the tongue pressure measuring device 100 or start measuring the tongue pressure.
The buzzer 114 emits an alarm sound by an alarm signal output from the control circuit 1. The details of the output of the alarm signal by the control circuit 1 will be described later.

[Control circuit]
The control circuit 1 is a circuit that controls the operation of the display unit 112, the buzzer 114, the pressure sensor 115, the pump 116, the sluice valve 117, the exhaust valve 118, and the like, and has a storage unit 10 and a control unit 20.
The storage unit 10 stores various programs and various data for controlling the operation of the tongue pressure measuring device 100. As various data, for example, as described later, an allowable voltage drop ΔVt or the like that can be tolerated as a voltage drop due to the internal resistance of the battery B is stored.

The control unit 20 is composed of a CPU (Central Processing Unit), and includes a drive control unit 21, a calculation unit 22, a comparison unit 23, an alarm unit 24, and a pressure measurement unit 25.
The drive control unit 21 reads out and executes various programs stored in the storage unit 10 to output a drive signal for driving the pump 116, the sluice valve 117, and the exhaust valve 118. The calculation unit 22 calculates the difference between the open circuit voltage Vin1 and the terminal voltage Vin2 of the battery B as the actual voltage drop ΔVn. The comparison unit 23 compares the actual voltage drop ΔVn calculated by the calculation unit 22 with the allowable voltage drop ΔVt stored in the storage unit 10. The alarm unit 24 controls the output of the alarm signal to the buzzer 114. The pressure measuring unit 25 inputs a signal of the pressure value from the pressure sensor 115, and outputs a display signal corresponding to the input pressure value to the display unit 112.
The details of the function of the control unit 20 will be described later.

[Drive circuit]
FIG. 3 is a schematic diagram showing a circuit configuration of the drive circuit 30 of the sluice valve 117.
As shown in FIG. 3, the gate valve 117 is electrically connected to the battery B, the drive circuit 30, and the control circuit 1. Further, the control circuit 1 is connected to the positive power supply VCS.
The drive circuit 30 of the sluice valve 117 is a circuit for driving the sluice valve 117, and includes a booster circuit 31 and a switch 32.
The booster circuit 31 is a circuit for boosting the terminal voltage Vin2 of the battery B to keep the drive voltage Vc of the sluice valve 117 constant. As a result, even when the terminal voltage Vin2 drops due to the consumption of the battery B or the like, the drive voltage Vc and the drive current Ic of the sluice valve 117 can be kept constant.

The switch 32 is a switch for opening and closing the drive circuit 30 of the sluice valve 117, and when a drive signal is input from the drive control unit 21, the drive circuit 30 is connected and the input of the drive signal is stopped. It is configured to open the drive circuit 30.
Here, in the present embodiment, the sluice valve 117 is opened when the drive circuit 30 is connected, that is, when the drive current Ic is supplied, and when the drive circuit 30 is released, that is, It is configured to be "closed" when the drive current Ic is stopped. Therefore, when the drive signal is input from the drive control unit 21 to the switch 32, the sluice valve 117 is "open", and when the input of the drive signal is stopped, the sluice valve 117 is "closed".
In the present embodiment, the drive circuit 30 of the pump 116 and the exhaust valve 118 is configured in the same manner as the drive circuit 30 of the sluice valve 117. Therefore, the details thereof will be omitted.

[Voltage drop confirmation method]
Next, a method of confirming the battery voltage drop of the battery B by the control circuit 1 will be described.
FIG. 4 is a flowchart illustrating a process of confirming a voltage drop of the battery B.
As shown in FIGS. 2 to 4, the control unit 20 applies the open circuit voltage Vin1 of the battery B in a state where power is not supplied to the pump 116, the sluice valve 117, and the exhaust valve 118, that is, in a state where no load is applied. The measurement is performed and the result is stored in the storage unit 10 (step S1).
In the present embodiment, the control unit 20 includes an A / D converter (not shown), and is configured to be able to measure the voltage of the battery B. However, the present invention is not limited to this, and for example, a voltmeter for measuring the voltage of the battery B may be separately provided, and the open circuit voltage Vin1 may be measured by the voltmeter.

Next, the drive control unit 21 outputs a drive signal to the switch 32 to "open" the sluice valve 117 (step S2).
Here, in the present embodiment, the step S2 is executed as one step of the tongue pressure measuring step by the tongue pressure measuring device 100, that is, as a step of opening the connection between the pump 116 and the balloon main body 121.

In the state where the sluice valve 117 is "opened" in step S2, that is, in the state where the drive current Ic is supplied to the sluice valve 117 and the battery B is loaded, the control unit 20 receives the terminal voltage of the battery B. Vin2 is measured, and the result is stored in the storage unit 10 (step S3). As a result, the open circuit voltage Vin1 and the terminal voltage Vin2 of the battery B are stored in the storage unit 10. That is, the sluice valve 117, which is a solenoid valve, is an example of a load of the present invention that requires a drive current Ic.

Next, the drive control unit 21 stops the output of the drive signal to the switch 32 and "closes" the sluice valve 117 (step S4). Note that step S4 is executed as one step of the tongue pressure measuring step, similarly to step S2. That is, step S4 is executed as a step of "closing" the sluice valve 117 in order to insert the balloon body 121 into the oral cavity and measure the tongue pressure.

After step S4, the calculation unit 22 reads out the open circuit voltage Vin1 and the terminal voltage Vin2 stored in the storage unit 10, and calculates the difference between them as the actual voltage drop ΔVn (step S5). Here, this actual voltage drop ΔVn is the voltage drop due to the actual internal resistance r of the battery B.
Then, the comparison unit 23 sets the allowable voltage drop ΔVt corresponding to the open circuit voltage Vin1 stored in the storage unit 10 to, for example, the allowable voltage drop ΔVt previously stored in the storage unit 10 and the open circuit voltage as shown in FIG. Refer to from the table showing the relationship with Vin1 (step S6).

FIG. 5 is a diagram showing an example of the relationship between the allowable voltage drop ΔVt and the open circuit voltage Vin1 in the present embodiment.
Here, the internal resistance r of the battery B is expressed by the following equation (1) from the open circuit voltage Vin1 and the terminal voltage Vin2 of the battery B and the current consumption Iin when the sluice valve 117, which is a load, is driven. Can be done.

r = (Vin1-Vin2) / Iin ... (1)

The current consumption Iin when the sluice valve 117 is driven is as follows from the relationship of input power (current consumption Iin × terminal voltage Vin2) × efficiency u = output power (drive voltage Vc × drive current Ic) in the booster circuit 31. It can be obtained as in equation (2).

Iin x Vin2 x u = Vc x Ic
Iin = (Vc × Ic) / (u × Vin2) ... (2)

Then, by expanding the above equations (1) and (2), the following equation (3) can be obtained.

r = (Vin1-Vin2) / ((Vc × Ic) / (u × Vin2))
ΔVt = r × ((Vc × Ic) / (u × Vin2)) ... (3)

Here, in the present embodiment, the efficiency u of the booster circuit 31 is set to, for example, 100%. Further, the drive voltage Vc and the drive current Ic of the sluice valve 117 are set to, for example, 2.9 V and 345 mA, respectively. Then, when the maximum value of the allowable internal resistance r is set to, for example, 1Ω, the allowable voltage drop ΔVt can be obtained from the equation (3). That is, the allowable voltage drop ΔVt can be obtained from the terminal voltage Vin2.
Here, when the open circuit voltage Vin1 is set to a certain value, the terminal voltage Vin2 can be obtained from the equation (1). That is, the terminal voltage Vin2 is determined from the current consumption Iin. Then, this current consumption Iin can be obtained from the equation (2). That is, the current consumption Iin is determined from the terminal voltage Vin2. That is, when the terminal voltage Vin2 and the current consumption Iin determine the other value based on one value, one of the underlying values changes based on the determined other value. Therefore, in the present embodiment, the convergence values of the current consumption Iin and the terminal voltage Vin2 are obtained by iteratively calculating the equations (1) and (2). Then, based on the convergent values of the current consumption Iin and the terminal voltage Vin2, the allowable voltage drop ΔVt is obtained for each open circuit voltage Vin1.
Then, the relationship between the open circuit voltage Vin1 and the allowable voltage drop ΔVt is tabulated as shown in FIG. 5, and stored in the storage unit 10 in advance. The relationship between the open circuit voltage Vin1 and the allowable voltage drop ΔVt is not limited to being tabulated as shown in FIG. 5 and stored in advance in the storage unit 10. For example, an equation showing the relationship between the open circuit voltage Vin1 and the allowable voltage drop ΔVt may be stored in the storage unit 10 in advance.

Returning to FIG. 4, after step S6, the comparison unit 23 determines whether or not the actual voltage drop ΔVn calculated in step S5 is larger than the allowable voltage drop ΔVt referred to in step S6 (step S7). ).
If No is determined in step S7, the process ends as it is.

On the other hand, if Yes is determined in step S7, the alarm unit 24 outputs an alarm signal to the buzzer 114 (step S8). As a result, the buzzer 114 emits an alarm sound, so that the user recognizes that the actual voltage drop ΔVn exceeds the allowable voltage drop ΔVt, that is, the battery B is deteriorated due to an increase in internal resistance. be able to. Therefore, since the battery B can be replaced at this stage, the user can avoid an abnormal operation due to an increase in the internal resistance r of the battery B.

[Effect of the first embodiment]
As described above, in the first embodiment, the following effects can be achieved.
(1) An allowable allowable voltage drop ΔVt as a voltage drop due to the internal resistance r of the battery B is tabulated for each open circuit voltage Vin1 and stored in advance in the storage unit 10 of the control circuit 1. The calculation unit 22 calculates the difference between the open circuit voltage Vin1 in the battery B actually used in the unloaded state and the terminal voltage Vin2 in the loaded state by the sluice valve 117 as the actual voltage drop ΔVn. .. Then, the comparison unit 23 compares the allowable voltage drop ΔVt and the actual voltage drop ΔVn in the open circuit voltage Vin1 based on the data from the storage unit 10 and the data from the calculation unit 22, and as a result, ΔVt <ΔVn. If so, the alarm unit 24 outputs an alarm signal to the buzzer 114 and generates an alarm sound. This makes it possible to avoid abnormal operation due to an increase in the internal resistance r of the battery B. As described above, in the present embodiment, the abnormality of the voltage drop due to the internal resistance r of the battery B can be detected with a simple structure without directly measuring the internal resistance r of the battery B itself.

(2) Since the battery B is composed of two dry batteries, it can be easily obtained. Therefore, when the alarm signal is output from the alarm unit 24 as the internal resistance r of the battery B increases, the battery B can be easily replaced.

(3) The tongue pressure measuring device 100 includes a control circuit 1, a load such as a pump 116, a sluice valve 117, and an exhaust valve 118, and a case 111 accommodating these loads, the control circuit 1, and the battery B. Further, the tongue pressure measuring device 100 includes an elastic balloon 120 having a restoring force, a tube 122 connected to the elastic balloon 120, and an air flow path 119. Therefore, it is possible to prevent the measured value from showing an abnormal value or the tongue pressure measurement from being stopped due to an abnormal operation caused by an increase in the internal resistance r of the battery B during the measurement of the tongue pressure. be able to.

(4) Further, the terminal voltage Vin2 when the sluice valve 117, which is an electromagnetic valve, is driven as a load is measured, and the difference between the terminal voltage Vin2 and the open circuit voltage Vin1 is calculated as the actual voltage drop ΔVn. Here, since the drive voltage Vc and the drive current Ic of the sluice valve 117, which is a solenoid valve, are stable, the measurement error of the terminal voltage Vin2 of the battery B can be reduced. Therefore, it is possible to reliably avoid the abnormal operation due to the increase in the internal resistance r of the battery B.

[Second Embodiment]
Next, the second embodiment of the present invention will be described with reference to the drawings.
The device of the second embodiment is different from the first embodiment in that it is a pressure generating device including a tank and a pressurizing pump.

FIG. 6 is a block diagram showing an outline of the pressure generator 200. The pressure generator 200 is a device for generating a desired pressure, and is a device used for verifying the accuracy of a pressure gauge or the like. The pressure generator 200 is a battery-powerable device and is an example of the device of the present invention.
In FIG. 6, the pressure generator 200 includes a case 211, a display unit 212, an operation unit 213, a buzzer 214, a pressure sensor 215, a tank 216, and a pressurizing pump 217 that supplies fluid to the tank 216. A regulating valve 218, an exhaust valve 219, an air flow path 220, a control circuit 1A, and a drive circuit 30A are provided. In the case 211, the pressure sensor 215, the tank 216, the pressurizing pump 217, the adjusting valve 218 and the exhaust valve 219 are connected by an air flow path 220. One end 220A of the air flow path 220 is connected to a device for introducing air pressurized to an arbitrary pressure, and the other end 220B is open to the outside of the case 211.
Further, the case 211 houses the display unit 212, the operation unit 213, the buzzer 214, the pressure sensor 215, the pressurizing pump 217, the adjusting valve 218, the exhaust valve 219, and the battery B1 for supplying electric power to the control circuit 1A. ing. In the present embodiment, the battery B1 is composed of a dry battery as a primary battery, as in the first embodiment described above.
Of the above, the configurations other than the control circuit 1A are the same as the configurations of the known pressure generators, so the description thereof will be omitted.

[Control circuit]
The control circuit 1A is a circuit that controls the operation of the display unit 212, the buzzer 214, the pressure sensor 215, the pressurizing pump 217, the adjusting valve 218, the exhaust valve 219, and the like, and has a storage unit 10A and a control unit 20A.
The storage unit 10A stores various programs and various data for controlling the operation of the pressure generator 200. As various data, as in the first embodiment described above, an allowable allowable voltage drop ΔVt or the like as a voltage drop due to the internal resistance of the battery B1 is stored.

The control unit 20A is composed of a CPU (Central Processing Unit), and includes a drive control unit 21A, a calculation unit 22A, a comparison unit 23A, an alarm unit 24A, and a pressure setting unit 26.
The drive control unit 21A reads out and executes various programs stored in the storage unit 10A, and outputs a drive signal for driving the pressurizing pump 217, the adjusting valve 218, and the exhaust valve 219.
The pressure setting unit 26 sets the pressure value generated by the pressure generator 200. Based on the pressure value set by the pressure setting unit 26, the drive control unit 21A outputs a drive signal to the pressurizing pump 217 and the adjusting valve 218. The pressure setting control by the drive control unit 21A and the pressure setting unit 26 is the same as the control of the known pressure generator.

The functions of the calculation unit 22A, the comparison unit 23A, and the alarm unit 24A are the same as those in the first embodiment described above. That is, the calculation unit 22A calculates the difference between the open circuit voltage Vin1 and the terminal voltage Vin2 of the battery B1 as the actual voltage drop ΔVn. In the present embodiment, the calculation unit 22A calculates the difference between the open circuit voltage Vin1 of the battery B1 and the terminal voltage Vin2 under the load of the pressurizing pump 217. That is, in the present embodiment, the pressurizing pump 217 is an example of a load that requires a large drive current. The comparison unit 23A compares the actual voltage drop ΔVn calculated by the calculation unit 22A with the allowable voltage drop ΔVt stored in the storage unit 10A. The alarm unit 24A controls the output of the alarm signal to the buzzer 214. As a result, when the comparison unit 23A determines that the actual voltage drop ΔVn calculated by the calculation unit 22A exceeds the allowable voltage drop ΔVt due to the increase in the internal resistance r of the battery B1, the alarm unit 24A sends an alarm signal to the buzzer 214. Output. Therefore, it is possible to avoid an abnormal operation due to an increase in the internal resistance r of the battery B1.

[Effect of the second embodiment]
As described above, in the second embodiment, the following effects can be obtained.
(5) The pressure generating device 200 has a storage unit 10A and a control unit 20A, similarly to the tongue pressure measuring device 100 of the first embodiment described above, and the control unit 20A includes a calculation unit 22A, a comparison unit 23A, and a control unit 20A. The alarm unit 24A is provided. Therefore, it is possible to prevent a pressure different from the set pressure value from being generated due to an abnormal operation due to an increase in the internal resistance of the battery B1.

[Modification example]
The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like to the extent that the object of the present invention can be achieved are included in the present invention.
In the first embodiment, the calculation unit 22 measures the terminal voltage Vin2 when the sluice valve 117 is driven, and calculates the difference between the terminal voltage Vin2 and the open circuit voltage Vin1 as the actual voltage drop ΔVn. , Not limited to this. For example, the terminal voltage Vin2 when the pump 116 or the exhaust valve 118 is driven may be measured to calculate the actual voltage drop ΔVn.

In the first embodiment, the open circuit voltage Vin1 and the terminal voltage Vin2 are measured when the sluice valve 117 is opened and closed in one step of the tongue pressure measuring step, but the present invention is not limited to this. For example, apart from the tongue pressure measurement, a program for confirming the voltage drop of the battery may be stored in the storage unit in advance, and the open circuit voltage Vin1 and the terminal voltage Vin2 may be measured by executing the program. good.

In each of the above embodiments, the batteries B and B1 are composed of a dry battery as a primary battery, but the battery B and B1 are not limited thereto. For example, the battery may be a secondary battery, and may be a battery whose terminal voltage drops as the internal resistance increases.

In each of the above-described embodiments, the alarm units 24 and 24A output alarm signals to the buzzers 114 and 214, but the present invention is not limited to this. For example, the alarm unit may output an alarm signal to the display unit and display the alarm on the display unit, or the alarm unit may output the alarm signal to both the buzzer and the display unit. good.

In each of the above embodiments, the tongue pressure measuring device 100 and the pressure generating device 200 are shown as the devices, but the device is not limited thereto. For example, the device may be an ultrasonic flow meter having a vibrator as a load, and may be a device that drives the load by a battery.

1,1A ... control circuit, 10,10A ... storage unit, 20,20A ... control unit, 21,21A ... drive control unit, 22,22A ... calculation unit, 23,23A ... comparison unit, 24,24A ... alarm unit, 25 ... pressure measuring unit, 26 ... pressure setting unit, 30, 30A ... drive circuit, 31 ... boosting circuit, 32 ... switch, 100 ... tongue pressure measuring device, 110 ... device body, 111 ... case, 112 ... display unit, 113 ... operation unit, 114 ... buzzer, 115 ... pressure sensor, 116 ... pump, 117 ... sluice valve (load), 118 ... exhaust valve, 119 ... air flow path, 120 ... elastic balloon, 121 ... balloon body, 122 ... tube, 200 ... Pressure generator, 211 ... Case, 212 ... Display, 213 ... Operation, 214 ... Buzzer, 215 ... Pressure sensor, 216 ... Tank, 217 ... Pressurized pump (load), 218 ... Adjustment valve, 219 ... Exhaust Valve, 220 ... air flow path, B, B1 ... battery.

Claims (3)

An elastic balloon with restoring force and
The flow path connected to the elastic balloon and
A pump that supplies air to the flow path and
A solenoid valve provided in the flow path that opens and closes the connection between the pump and the elastic balloon.
A pressure sensor that is connected to the elastic balloon via the flow path and detects pressure fluctuations due to deformation of the elastic balloon.
A control circuit that controls the operation of the pump, the solenoid valve, and the pressure sensor.
The pump, the pressure sensor, the control circuit, the solenoid valve, and the case for accommodating the battery are provided.
The control circuit has an allowable allowable voltage drop ΔVt as a voltage drop due to the internal resistance of the battery that can be used to drive the electromagnetic valve that is a load , and an open circuit voltage of the battery in a state where the load is not applied. Calculated by the calculation unit, which calculates the difference between the storage unit that stores the relationship with Vin1 in advance and the terminal voltage Vin2 of the battery under the load, as the actual voltage drop ΔVn. A comparison unit that compares the actual voltage drop ΔVn at the open circuit voltage Vin1 and the allowable voltage drop ΔVt at the open circuit voltage Vin1 stored in the storage unit, and as a result of comparison by the comparison unit, the actual voltage drop ΔVn. Has an alarm unit that outputs an alarm signal when the allowable voltage drop ΔVt is exceeded, and includes a control unit configured to be able to measure the open circuit voltage Vin1 and the terminal voltage Vin2.
A tongue pressure measuring device characterized by this. In the tongue pressure measuring device according to claim 1,
The tongue pressure measuring device, characterized in that the battery is a primary battery. An elastic balloon having a restoring force, a flow path connected to the elastic balloon, a pump for supplying air to the flow path, and a pump provided in the flow path to open and disconnect the connection between the pump and the elastic balloon. Controls the operation of the pump, the electromagnetic valve, and the pressure sensor, which is connected to the elastic balloon via the flow path and detects a voltage fluctuation due to deformation of the elastic balloon. The control circuit comprises a pump, a pressure sensor, a control circuit, a case for accommodating the electromagnetic valve and a battery, and the control circuit can be used to drive the electromagnetic valve which is a load . A storage unit that previously stores the relationship between the permissible allowable voltage drop ΔVt as a voltage drop due to the internal resistance of the battery and the open circuit voltage Vin1 of the battery in a state where the load is not applied, and the open circuit voltage Vin1 and the load are The calculation unit that calculates the difference from the terminal voltage Vin2 of the battery in the applied state as the actual voltage drop ΔVn, the actual voltage drop ΔVn in the open circuit voltage Vin1 calculated by the calculation unit, and the storage unit. It has a comparison unit that compares the allowable voltage drop ΔVt at the open circuit voltage Vin1 and an alarm unit that outputs an alarm signal when the actual voltage drop ΔVn exceeds the allowable voltage drop ΔVt as a result of the comparison by the comparison unit. A method for confirming a battery voltage drop of a tongue pressure measuring device including a control unit configured to be capable of measuring the open circuit voltage Vin1 and the terminal voltage Vin2.
The storage unit describes the relationship between the allowable voltage drop ΔVt, which is acceptable as a voltage drop due to the internal resistance of the battery that can be used to drive the load, and the open circuit voltage Vin1 of the battery in a state where the load is not applied. Steps to memorize in advance and
A step of calculating the difference between the open circuit voltage Vin1 and the terminal voltage Vin2 of the battery under the load as the actual voltage drop ΔVn by the calculation unit.
A step of comparing the calculated actual voltage drop ΔVn at the open circuit voltage Vin1 with the allowable voltage drop ΔVt at the open circuit voltage Vin1 stored in the storage unit in the comparison unit.
As a result of comparison, the battery voltage drop confirmation of the tongue pressure measuring device is provided with a step of outputting an alarm signal by the alarm unit when the actual voltage drop ΔVn exceeds the allowable voltage drop ΔVt. Method.

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